U.S. patent application number 13/943273 was filed with the patent office on 2014-03-20 for fluid applied silicone air & water barrier system and process thereof.
The applicant listed for this patent is Gene E. Dorman. Invention is credited to Gene E. Dorman.
Application Number | 20140079887 13/943273 |
Document ID | / |
Family ID | 45003075 |
Filed Date | 2014-03-20 |
United States Patent
Application |
20140079887 |
Kind Code |
A1 |
Dorman; Gene E. |
March 20, 2014 |
FLUID APPLIED SILICONE AIR & WATER BARRIER SYSTEM AND PROCESS
THEREOF
Abstract
There is provided herein a one-part room temperature vulcanizing
(RTV) silicone based air and water barrier composition comprising
silanol-terminated diorganopolysiloxane polymer; fumed silica;
stearic acid treated ground calcium carbonate extending filler;
polyalkoxy crosslinking agent; metal chelate condensation cure
catalyst; and, an adhesion promoter. There is also provided a wall
assembly comprising said composition.
Inventors: |
Dorman; Gene E.; (Corona,
CA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Dorman; Gene E. |
Corona |
CA |
US |
|
|
Family ID: |
45003075 |
Appl. No.: |
13/943273 |
Filed: |
July 16, 2013 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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13289799 |
Nov 4, 2011 |
8513328 |
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13943273 |
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61411222 |
Nov 8, 2010 |
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61411198 |
Nov 8, 2010 |
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Current U.S.
Class: |
427/387 ;
523/122; 524/400; 524/425 |
Current CPC
Class: |
C08K 5/5435 20130101;
C08G 77/16 20130101; C08L 83/06 20130101; C08K 5/5419 20130101;
C08K 5/5425 20130101; C09D 7/61 20180101; C08K 5/5442 20130101;
C08K 5/5415 20130101; C09D 7/63 20180101 |
Class at
Publication: |
427/387 ;
524/400; 524/425; 523/122 |
International
Class: |
C09D 7/12 20060101
C09D007/12 |
Claims
1-20. (canceled)
21. A one-part room temperature vulcanizing (RTV) silicone coating
composition comprising: about 20 wt. % to about 80 wt. %, of
silanol-terminated diorganopolysiloxane polymer having a viscosity
between about 100 centipoise to about 500,000 centipoise at about
25.degree. C. wherein the organo groups are monovalent hydrocarbon
radicals containing up to about 30 carbon atoms; up to about 20 wt.
% of a treated fumed silica reinforcing filler; up to about 60 wt.
% of at least one of a stearic acid treated ground calcium
carbonate extending filler; and, a precipitated calcium carbonate
filler; about 0.5 wt. % to about 10 wt. % of a polyalkoxy
crosslinking agent having the general formula:
(R.sup.1O).sub.4-a--Si--R.sup.2.sub.a where R.sup.1 and R.sup.2 are
monovalent hydrocarbon radicals of up to about 30 carbon atoms, and
a is zero, 1 or 2; about 0.05 wt. % to about 5 wt. % of a metal
chelate condensation cure catalyst having the general formula:
##STR00011## where Me is a metal selected from the group consisting
of lead, tin, zirconium, antimony, iron, cadmium, barium,
manganese, zinc, cobalt, nickel, aluminum, gallium, germanium and
titanium, s is from about 0.7 to about 1.3, and t is from 1.2 to
0.8, R.sup.6 is a divalent hydrocarbon radical containing from
about 2 to about 20 carbon atoms, optionally substituted with a
hydrocarbon group containing up to 8 carbon atoms, R.sup.2 is
hydrogen or an organic radical selected from the group consisting
of hydrocarbyl, halohydrocarbyl and acyl each containing up to
about 8 carbon atoms, R.sup.3 is hydrogen or an organic radical
selected from the group consisting of hydrocarbyl, halohydrocarbyl
and acyl containing up to about 8 carbon atoms, or R.sup.3 is part
of a cyclic hydrocarbon group formed by a bond to a carbon atom of
the adjacent R.sup.2 and/or R.sup.3 group wherein the cyclic
hydrocarbon group contains up to about 12 carbon atoms and is
optionally substituted with one or more functional groups selected
from the group consisting of chloro, nitro, ester, cyano, and
carboxy ester substituents; R.sup.4 is defined the same as R.sup.2;
R.sup.5 is a monovalent organic radical selected from the group
consisting of hydrocarbyl, halohydrocarbyl and ether containing up
to 60 carbon atoms, cyanoalkyl containing up to 12 carbon atoms,
amino, and polyether groups of the formula
(C.sub.qH.sub.2qO).sub.vR.sup.30, where q is from 2 to 4, and v is
from 1 to 20, and R.sup.30 is a monovalent hydrocarbon radical of
from 1 to 30 carbon atoms; up to about 5 wt. % of an adhesion
promoter selected from the group consisting of an organofunctional
polyalkoxy silane adhesion promoter having the general formula:
##STR00012## where R.sup.11 and R.sup.12 are monovalent hydrocarbon
radicals containing up to about 8 carbon atoms, t is 0 to 3 and Z
is a saturated, unsaturated, or aromatic hydrocarbon containing up
to about 30 carbon atoms, which is further functionalized by a
group selected from the group consisting of ether, epoxy,
isocyanato, cyano, acryloxy, and acyloxy; an isocyanato-functional
polyalkoxy silane adhesion promoter of the general formula:
##STR00013## wherein G is selected from R.sup.11 radicals as
defined above, styryl, vinyl, allyl, chloroallyl, cyclohexenyl, and
radicals of the formula ##STR00014## wherein R.sup.11 and R.sup.12
are monovalent hydrocarbon radicals containing up to about 8 carbon
atoms, where R.sup.13 is a monovalent hydrocarbon radical
containing up to about 8 carbon atoms or a monovalent cyanoalkyl
radical containing up to 8 carbon atoms, and wherein R.sup.15 is a
divalent hydrocarbon radical selected from the group consisting of
alkylenearylene, alkylene, and cycloalkylene and halogenated
alkylenearylene, alkylene, and cycloalkylene each containing from 2
to about 12 carbon atoms, and where b is 0 or an integer from 1 to
2; and, combinations thereof, and wherein the silicone composition
can function as at least one of a sealant, an adhesive, a water
barrier and an air barrier.
22. The silicone coating composition of claim 21, wherein the
composition is effective to function simultaneously as a sealant,
an adhesive, a water barrier and an air barrier.
23. The composition of claim 21 further comprising up to about 60
wt % of a hydrocarbon processing aid.
24. The composition of claim 21 wherein the silanol-terminated
diorganopolysiloxane polymer is of the general formula:
##STR00015## where R.sup.1 and R.sup.2 are monovalent hydrocarbon
radicals containing up to about 12 carbon atoms, and where "p"
varies such that the viscosity of the polymer varies from about 100
centipoise to about 500,000 centipoise at 25.degree. C.
25. The composition of claim 21 wherein p is from 10 to about
4000.
26. The composition of claim 21 where in the formula for the
polyalkoxy silane crosslinking agent a is zero, 1, or 2.
27. The composition of claim 21 wherein the polyalkoxy silane
crosslinking agent is selected from the group consisting of
methyltrimethoxysilane, vinyltrimethoxysilane, tetramethoxysilane,
methyltriethoxysilane, vinyltrimethoxysilane and
tetraethoxysilane.
28. The composition of claim 21 wherein Me is titanium.
29. The composition of claim 21 wherein R.sup.6 is propylene,
R.sup.3 is hydrogen, R.sup.2 and R.sup.4 are methyl and R.sup.5 is
ethyl.
30. The composition of claim 21 wherein the metal chelate
condensation catalyst is of the general formula: ##STR00016##
wherein Ti is titanium and s and t are each 1.
31. The composition of claim 21 wherein the adhesion promoter is
selected from the group consisting of
1,3,5-tristrimethoxysilylpropylisocyanurate,
bis-1,3-trimethoxysilylpropylisocyanurate,
1,3,5-tristrimethoxysilylethylisocyanurate,
1,3,5-trismethyldimethoxysilylpropylisocyanurate,
1,3,5-trismethyldiethoxysilylpropylisocyanurate,
n-2-aminoethyl-3-aminopropyltriethoxysilane,
methacryloxypropyltrimethoxysilane,
methylaminopropyltrimethoxysilane,
.gamma.-glycidoxypropylethyldimethoxysilane,
.gamma.-glycidoxypropyltrimethoxysilane,
.gamma.-glycidoxyethyltrimethoxysilane,
.beta.-(3,4-epoxycyclohexyl)propyltrimethoxysilane,
.beta.-(3,4-epoxycyclohexyl) ethylmethyldimethoxysilane,
isocyanatopropyltriethoxysilane,
isocyanatopropylmethyldimethoxysilane,
.beta.-cyanoethyltrimethoxysilane,
.gamma.-acryloxypropyltrimethoxysilane,
.gamma.-methacryloxypropylmethyldimethoxysilane,
4-amino-3,3,-dimethylbutyltrimethoxysilane,
n-ethyl-3-trimethoxysilyl-2-methylpropanamine, and combinations
thereof.
32. The composition of claim 21 wherein the adhesion promoter is
1,3,5-tristrimethoxysilylpropylisocyanurate.
33. The composition of claim 21 wherein the hydrocarbon processing
aid is based on 100 parts of the hydrocarbon fluid, greater than 40
parts by weight cyclic paraffinic hydrocarbons and less than 60
parts by weight noncyclic paraffinic hydrocarbons.
34. The composition of claim 33 wherein the cyclic paraffinic
hydrocarbons are selected from the group consisting of cyclohexane,
cyclooctane, cyclononane, and cyclododecane and combinations
thereof.
35. The composition of claim 33 wherein the non-cyclic paraffinic
hydrocarbons are selected from the group consisting of n-heptane,
n-octane, iso-octane, n-nonane, n-decane, n-undecane, n-dodecane,
iso-decane, n-heptadecane, n-octadecane, n-eicosane, isoeicosane
and combinations thereof.
36. The composition of claim 21 further comprising at least one of
a flame retardant, a fungicide, a pigment and a colorant.
37. A one-part room temperature vulcanizing (RTV) silicone coating
composition applicable in the manner of a coat of paint wherein the
composition comprises: about 20 wt. % to about 80 wt. %, of
silanol-terminated diorganopolysiloxane polymer having a viscosity
between about 100 centipoise to about 500,000 centipoise at about
25.degree. C. wherein the organo groups are monovalent hydrocarbon
radicals containing up to about 30 carbon atoms; up to about 20 wt.
% of a treated fumed silica reinforcing filler; up to about 60 wt.
% of at least one of a stearic acid treated ground calcium
carbonate extending filler; and, a precipitated calcium carbonate
filler; about 0.5 wt. % to about 10 wt. % of a polyalkoxy
crosslinking agent having the general formula:
(R.sup.1O).sub.4-a--Si--R.sup.2.sub.a where R.sup.1 and R.sup.2 are
monovalent hydrocarbon radicals of up to about 30 carbon atoms, and
a is zero, 1 or 2; about 0.05 wt. % to about 5 wt. % of a metal
chelate condensation cure catalyst having the general formula:
##STR00017## where Me is a metal selected from the group consisting
of lead, tin, zirconium, antimony, iron, cadmium, barium,
manganese, zinc, cobalt, nickel, aluminum, gallium, germanium and
titanium, s is from about 0.7 to about 1.3, and t is from 1.2 to
0.8, R.sup.6 is a divalent hydrocarbon radical containing from
about 2 to about 20 carbon atoms, optionally substituted with a
hydrocarbon group containing up to 8 carbon atoms, R.sup.2 is
hydrogen or an organic radical selected from the group consisting
of hydrocarbyl, halohydrocarbyl and acyl each containing up to
about 8 carbon atoms, R.sup.3 is hydrogen or an organic radical
selected from the group consisting of hydrocarbyl, halohydrocarbyl
and acyl containing up to about 8 carbon atoms, or R.sup.3 is part
of a cyclic hydrocarbon group formed by a bond to a carbon atom of
the adjacent R.sup.2 and/or R.sup.3 group wherein the cyclic
hydrocarbon group contains up to about 12 carbon atoms and is
optionally substituted with one or more functional groups selected
from the group consisting of chloro, nitro, ester, cyano, and
carboxy ester substituents; R.sup.4 is defined the same as R.sup.2;
R.sup.5 is a monovalent organic radical selected from the group
consisting of hydrocarbyl, halohydrocarbyl and ether containing up
to 60 carbon atoms, cyanoalkyl containing up to 12 carbon atoms,
amino, and polyether groups of the formula
(C.sub.qH.sub.2qO).sub.vR.sup.30, where q is from 2 to 4, and v is
from 1 to 20, and R.sup.30 is a monovalent hydrocarbon radical of
from 1 to 30 carbon atoms; up to about 5 wt. % of an adhesion
promoter selected from the group consisting of an organofunctional
polyalkoxy silane adhesion promoter having the general formula:
##STR00018## where R.sup.11 and R.sup.12 are monovalent hydrocarbon
radicals containing up to about 8 carbon atoms, t is 0 to 3 and Z
is a saturated, unsaturated, or aromatic hydrocarbon containing up
to about 30 carbon atoms, which is further functionalized by a
group selected from the group consisting of ether, epoxy,
isocyanato, cyano, acryloxy, and acyloxy; an isocyanato-functional
polyalkoxy silane adhesion promoter of the general formula:
##STR00019## wherein G is selected from R.sup.11 radicals as
defined above, styryl, vinyl, allyl, chloroallyl, cyclohexenyl, and
radicals of the formula ##STR00020## wherein R.sup.11 and R.sup.12
are monovalent hydrocarbon radicals containing up to about 8 carbon
atoms, where R.sup.13 is a monovalent hydrocarbon radical
containing up to about 8 carbon atoms or a monovalent cyanoalkyl
radical containing up to 8 carbon atoms, and wherein R.sup.15 is a
divalent hydrocarbon radical selected from the group consisting of
alkylenearylene, alkylene, and cycloalkylene and halogenated
alkylenearylene, alkylene, and cycloalkylene each containing from 2
to about 12 carbon atoms, and where b is 0 or an integer from 1 to
2; and, combinations thereof, and wherein the silicone composition
can function as at least one of a sealant, an adhesive, a water
barrier and an air barrier.
38. A method for applying a one-part room temperature vulcanizing
silicone polymer composition to a substrate, the method comprising:
(a) applying the one-part room temperature vulcanizing silicone
polymer composition to the substrate to the desired thickness,
wherein the one-part room temperature vulcanizing silicone polymer
composition comprises: about 20 wt. % to about 80 wt. %, of
silanol-terminated diorganopolysiloxane polymer having a viscosity
between about 100 centipoise to about 500,000 centipoise at about
25.degree. C. wherein the organo groups are monovalent hydrocarbon
radicals containing up to about 30 carbon atoms; up to about 20 wt.
% of a treated fumed silica reinforcing filler; up to about 60 wt.
% of at least one of a stearic acid treated ground calcium
carbonate extending filler; and, a precipitated calcium carbonate
filler; about 0.5 wt. % to about 10 wt. % of a polyalkoxy
crosslinking agent having the general formula:
(R.sup.1O).sub.4-a--Si--R.sup.2.sub.a where R.sup.1 and R.sup.2 are
monovalent hydrocarbon radicals of up to about 30 carbon atoms, and
a is zero, 1 or 2; about 0.05 wt. % to about 5 wt. % of a metal
chelate condensation cure catalyst having the general formula:
##STR00021## where Me is a metal selected from the group consisting
of lead, tin, zirconium, antimony, iron, cadmium, barium,
manganese, zinc, cobalt, nickel, aluminum, gallium, germanium and
titanium, s is from about 0.7 to about 1.3, and t is from 1.2 to
0.8, R.sup.6 is a divalent hydrocarbon radical containing from
about 2 to about 20 carbon atoms, optionally substituted with a
hydrocarbon group containing up to 8 carbon atoms, R.sup.2 is
hydrogen or an organic radical selected from the group consisting
of hydrocarbyl, halohydrocarbyl and acyl each containing up to
about 8 carbon atoms, R.sup.3 is hydrogen or an organic radical
selected from the group consisting of hydrocarbyl, halohydrocarbyl
and acyl containing up to about 8 carbon atoms, or R.sup.3 is part
of a cyclic hydrocarbon group formed by a bond to a carbon atom of
the adjacent R.sup.2 and/or R.sup.3 group wherein the cyclic
hydrocarbon group contains up to about 12 carbon atoms and is
optionally substituted with one or more functional groups selected
from the group consisting of chloro, nitro, ester, cyano, and
carboxy ester substituents; R.sup.4 is defined the same as R.sup.2;
R.sup.5 is a monovalent organic radical selected from the group
consisting of hydrocarbyl, halohydrocarbyl and ether containing up
to 60 carbon atoms, cyanoalkyl containing up to 12 carbon atoms,
amino, and polyether groups of the formula
(C.sub.qH.sub.2qO).sub.vR.sup.30, where q is from 2 to 4, and v is
from 1 to 20, and R.sup.30 is a monovalent hydrocarbon radical of
from 1 to 30 carbon atoms; up to about 5 wt. % of an adhesion
promoter selected from the group consisting of an organofunctional
polyalkoxy silane adhesion promoter having the general formula:
##STR00022## where R.sup.11 and R.sup.12 are monovalent hydrocarbon
radicals containing up to about 8 carbon atoms, t is 0 to 3 and Z
is a saturated, unsaturated, or aromatic hydrocarbon containing up
to about 30 carbon atoms, which is further functionalized by a
group selected from the group consisting of ether, epoxy,
isocyanato, cyano, acryloxy, and acyloxy; an isocyanato-functional
polyalkoxy silane adhesion promoter of the general formula:
##STR00023## wherein G is selected from R.sup.11 radicals as
defined above, styryl, vinyl, allyl, chloroallyl, cyclohexenyl, and
radicals of the formula ##STR00024## wherein R.sup.11 and R.sup.12
are monovalent hydrocarbon radicals containing up to about 8 carbon
atoms, where R.sup.13 is a monovalent hydrocarbon radical
containing up to about 8 carbon atoms or a monovalent cyanoalkyl
radical containing up to 8 carbon atoms, and wherein R.sup.15 is a
divalent hydrocarbon radical selected from the group consisting of
alkylenearylene, alkylene, and cycloalkylene and halogenated
alkylenearylene, alkylene, and cycloalkylene each containing from 2
to about 12 carbon atoms, and where b is 0 or an integer from 1 to
2; and, combinations thereof; and (b) curing the substrate coated
with the one-part room temperature vulcanizing silicone polymer
composition.
39. The method of claim 38 wherein the substrate is selected from
the group consisting of a construction sheathing substrate, a metal
substrate and a wood framing substrate.
Description
[0001] The present application is a divisional of copending U.S.
application Ser. No. 13/289,799 filed Nov. 4, 2011 which claims
priority to Provisional U.S. Patent Application Nos. 61/411,222 and
61/411,198, the entire contents of which are incorporated herein by
reference in their entirety.
FIELD OF THE INVENTION
[0002] The present invention relates to silicone based air and
water barrier compositions and barrier systems utilizing the same.
The present invention is also directed to items of construction,
particularly wall assemblies, comprising the silicone air and water
barrier system of the present invention.
BACKGROUND OF THE INVENTION
[0003] Any publications or references discussed herein are
presented to describe the background of the invention and to
provide additional detail regarding its practice. Nothing herein is
to be construed as an admission that the inventors are not entitled
to antedate such disclosure by virtue of prior invention.
[0004] New and remedial construction projects utilize a myriad of
air and water barriers systems in order to keep the structures dry
and free from drafts. These barrier systems are manufactured from
components that are mostly incompatible with silicone weather
sealants and often do not allow for sustainable adhesion of the
commonly used silicone weather sealant. This often adds cost to
jobs by requiring additional labor and adding complexities to the
design architect in order to provide a weather-tight building.
[0005] In addition, the air and water barriers available on the
market have limited ultraviolet exposure time before they need to
be covered, removed, or re-applied. This also adds to the costs of
a remolding and/or new construction. Accordingly, what is needed is
a silicone air and water barrier composition/system that is
compatible with silicone compositions, can be easily applied, has
enhanced water and air sealing characteristics and is not as
sensitive to ultraviolet light as other sealants available on the
market today.
SUMMARY OF THE INVENTION
[0006] The present invention provides a fluid applied silicone
based composition for use in construction as air and water one-part
and barrier system that satisfies the deficiencies that exist in
current state-of-the-art products and technologies.
[0007] The present invention is directed to a one-part room
temperature vulcanizing (RTV) silicone based air and water barrier
composition comprising:
[0008] about 20 weight percent (wt. %) to about 80 wt. %, of
silanol-terminated diorganopolysiloxane polymer having a viscosity
between about 100 centipoise to about 500,000 centipoise at about
25 degrees Celsius (.degree. C.) wherein the organo groups are
monovalent hydrocarbon radicals containing up to about 30 carbon
atoms;
[0009] up to about 20 wt. % of a treated fumed silica reinforcing
filler;
[0010] up to about 60 wt. % of at least one of a stearic acid
treated ground calcium carbonate extending filler; and, a
precipitated calcium carbonate filler
[0011] about 0.5 wt. % to about 10 wt. % of a polyalkoxy
crosslinking agent having the general formula:
(R.sup.1O).sub.4-a--Si--R.sup.2.sub.a
where R.sup.1 and R.sup.2 are monovalent hydrocarbon radicals of up
to about 30 carbon atoms, and a is zero or an integer that varies
such that the viscosity of the polymer varies from about 100 to
about 500,000 centipoise at 25.degree. C.;
[0012] up to about 0.05 wt. % to about 5 wt. % of a metal chelate
condensation cure catalyst having the general formula:
##STR00001##
[0013] where Me is a metal selected from the group consisting of
lead, tin, zirconium, antimony, iron, cadmium, barium, manganese,
zinc, cobalt, nickel, aluminum, gallium, germanium and
titanium,
[0014] s is from about 0.7 to about 1.3, and t is from 1.2 to
0.8,
[0015] R.sup.6 is a divalent hydrocarbon radical containing from
about 2 to about 20 carbon atoms optionally substituted with a
hydrocarbon group containing up to 8 carbon atoms,
[0016] R.sup.2 is hydrogen or an organic radical selected from the
group consisting of hydrocarbyl, halohydrocarbyl and acyl each
containing up to about 8 carbon atoms,
[0017] R.sup.3 is hydrogen or an organic radical selected from the
group consisting of hydrocarbyl, halohydrocarbyl and acyl
containing up to about 8 carbon atoms, or R.sup.3 is part of a
cyclic hydrocarbon group formed by a bond to a carbon atom of the
adjacent R.sup.2 and/or R.sup.3 group wherein the cyclic
hydrocarbon group contains up to about 12 carbon atoms and is
optionally substituted with one or more functional groups selected
from the group consisting of chloro, nitro, ester, cyano, and
carboxy ester substituents,
[0018] R.sup.4 is defined the same as R.sup.2;
[0019] R.sup.5 is a monovalent organic radical selected from the
group consisting of hydrocarbyl, halohydrocarbyl and ether
containing up to 60 carbon atoms, cyanoalkyl containing up to 12
carbon atoms, amino, and polyether groups of the formula
(C.sub.qH.sub.2qO).sub.vR.sup.30, where q is from 2 to 4, and v is
from 1 to 20, and R.sup.30 is a monovalent hydrocarbon radical of
from 1 to 30 carbon atoms;
[0020] up to about 5 wt. % of an adhesion promoter selected from
the group consisting of an organofunctional polyalkoxy silane
adhesion promoter having the general formula:
##STR00002##
[0021] where R.sup.11 and R.sup.12 are monovalent hydrocarbon
radicals containing up to about 8 carbons, t is 0 to 3 and
[0022] Z is a saturated, unsaturated, or aromatic hydrocarbon which
is further functionalized by a group selected from the group
consisting of ether, epoxy, isocyanato, cyano, acryloxy, and
acyloxy; an isocyanato-functional polyalkoxy silane adhesion
promoter of the general formula:
##STR00003##
[0023] wherein G is selected from R.sup.11 radicals as defined
above, styryl, vinyl, allyl, chloroallyl, cyclohexenyl, and
radicals of the formula
##STR00004##
[0024] wherein R.sup.11 and R.sup.12 are monovalent hydrocarbon
radicals containing up to about 8 carbon atoms, where R.sup.13 is a
monovalent hydrocarbon radical containing up to about 8 carbon
atoms or a monovalent cyanoalkyl radical containing up to about 8
carbon atoms,
[0025] and wherein R.sup.15 is a divalent hydrocarbon radical
selected from the group consisting of alkylenearylene, alkylene,
and cycloalkylene and halogenated alkylenearylene, alkylene, and
cycloalkylene each containing from 2 to about 12 carbon atoms,
[0026] and where b is 0 or an integer from 1 to about 2; and,
combinations thereof.
[0027] Another embodiment herein is directed to a wall assembly
comprising the silicone polymer composition described herein.
[0028] The present invention is further described in the detailed
description section including the examples provided below.
BRIEF DESCRIPTION OF THE DRAWINGS
[0029] FIG. 1 is a view of a red and grey heat cure elastomer
adhered to a glass fiber sheathing substrate using a silicone
coating material;
[0030] FIG. 2 is a view of a red and grey heat core elastomer
adhered to a glass fiber sheathing substrate using a neutral cure
silicone sealant;
[0031] FIG. 3 is a view of a red and grey heat cure elastomer
adhered at a 90 degree angle to a painted aluminum substrate using
a silicone sealant;
[0032] FIG. 4 is a view of the results of one silicone coating
material 3 sealants and one MS polymer sealant in a dry adhesion
test to a glass fiber sheathing substrate;
[0033] FIGS. 5A-5D are views of the results of an adhesion test
using a silicone coating material as the adhesive on a galvanized
metal substrate; and
[0034] FIGS. 6A-6C are views of a miniature wood stud framed
mock-up utilizing a silicone sealant as the adhesive to adhere an
elastomer transition strip to the wood stud framing and glass fiber
sheathing substrate.
DESCRIPTION OF THE INVENTION
[0035] The present invention is directed to a one-part room
temperature vulcanizing (RTV) silicone polymer composition for use
as a fluid applied silicone air and water barrier system. The water
and air barrier system of the present invention has superior
sealant properties over other sealants available on the market. The
one-part room temperature vulcanizing (RTV) silicone polymer
composition herein (sealant composition) adheres to standard
silicone weather stripping used universally in construction making
it easier to use than other sealants that are not compatible with
standard weather stripping. The compatibility of the present
composition along with the superior properties it exhibits reduces
the cost of construction and improves protection of a building from
adverse weather conditions. The composition and its uses are
further described in greater detail below.
[0036] As used herein, "homopolymers" are polymers made from the
same repeating monomer and `copolymers" are polymers wherein the
polymer contains at least two structurally different monomers.
Notations such as (meth)acrylate denote monomer with either
acrylate or methacrylate functionality.
[0037] Also, as used in the specification and including the
appended claims, the singular forms "a," "an," and "the" include
the plural, and reference to a particular numerical value includes
at least that particular value, unless the context clearly dictates
otherwise.
[0038] Ranges may be expressed herein as from "about" or
"approximately" one particular value and/or to "about" or
"approximately" another particular value. When such a range is
expressed, another embodiment includes from the one particular
value and/or to the other particular value. Similarly, when values
are expressed as approximations, by use of the antecedent "about,"
it will be understood that the particular value forms another
embodiment.
[0039] All methods described herein may be performed in any
suitable order unless otherwise indicated herein or otherwise
clearly contradicted by context. The use of any and all examples,
or exemplary language (e.g., "such as") provided herein, is
intended merely to better illuminate the invention and does not
pose a limitation on the scope of the invention unless otherwise
claimed. No language in the specification should be construed as
indicating any non-claimed element as essential to the practice of
the invention.
[0040] As used herein, "comprising," "including," "containing,"
"characterized by," and grammatical equivalents thereof are
inclusive or open-ended terms that do not exclude additional,
unrecited elements or method steps, but will also be understood to
include the more restrictive terms "consisting of" and "consisting
essentially of."
[0041] One embodiment of the present invention is directed to a
one-part room temperature vulcanizing (RTV) silicone based air and
water barrier composition that is curable in the presence of
moisture.
[0042] A general description of each of the components of the
one-part RTV composition for use as a sealant composition is
provided below.
[0043] The air and water barrier sealant composition herein
comprises the following components: (1) about 20 wt. % to 80 wt. %,
specifically about 25 wt. % to about 75 wt. %, and more
specifically about 30 wt. % to about 50 wt. % of a
silanol-terminated diorganopolysiloxane polymer having a viscosity
varying from about 100 centipoise to about 500,000 centipoise at
about 25.degree. C., where the organo groups are monovalent
hydrocarbon radicals containing up to about 60 carbon atoms.
[0044] In one specific embodiment the viscosity of the
silanol-terminated diorganopolysiloxane polymer varies from about
1,000 centipoise to about 20,000 centipoise at 25.degree. C., and
in a even more specific embodiment the viscosity ranges from about
2,000 centipoise to about 10,000 centipoise at 25.degree. C.
[0045] The organo group in the silanol-terminated
diorganopolysiloxane polymer can be a monovalent hydrocarbon
radical, for example, alkyl radicals containing from 1 to about 8
carbon atoms, such as the non-limiting embodiments of methyl,
ethyl, propyl, etc; cyclo alkyl radicals such as the non-limiting
embodiments of cyclopentyl, cyclohexyl, and so forth; alkenyl such
as the non-limiting embodiments of vinyl, allyl and so forth;
mononuclear aryl radicals such as the non-limiting embodiments such
as phenyl, methylphenyl, ethylphenyl, and so forth; and fluoroalkyl
radicals such as the non-limiting embodiment of
3,3,3-trifluropropyl. In one-non-limiting embodiment, the
silanol-terminated diorganopolysiloxane polymer can have only one
terminus being silanol with the other terminus being a monovalent
hydrocarbon radical as described above.
[0046] In one specific non-limiting embodiment the
silanol-terminated diorganopolysiloxane polymer can have the
generic formula (I):
##STR00005##
where R.sup.1 and R.sup.2 are monovalent hydrocarbon radicals of
from 1 to about 12 carbon atoms, and where "p" varies such that the
viscosity of the polymer varies from about 100 centipoise to about
500,000 centipoise at 25.degree. C., and more specifically from
about 1,000 centipoise to about 20,000 centipoise at 25.degree. C.,
and even more specifically from about 2,000 centipoise to about
10,000 centipoise at 25.degree. C. In a specific embodiment the
value of p in formula (I) can be from 1 to about 4,000, more
specifically from about 10 to about 1000, and most specifically
from about 100 to about 500.
[0047] The R.sup.1 and R.sup.2 groups of formula (I) may be the
same or different and are generally selected from the same groups
as the monovalent hydrocarbon radicals defined above for the organo
groups of the silanol-terminated diorganopolysiloxane polymer.
Specifically, at least about 50% of the total number of R.sup.1 and
R.sup.2 radicals are alkyl radicals containing from 1 to about 8
carbon atoms, and any remaining R.sup.1 and R.sup.2 radicals are
aryl radicals. More specifically, at least about 75% of the total
number of R.sup.1 and R.sup.2 radicals are alkyl radicals
containing from 1 to about 8 carbon atoms, and any remaining
R.sup.1 and R.sup.2 radicals are aryl radicals. Most specifically,
at least about 50% of the total number of R.sup.1 and R.sup.2
radicals are alkyl radicals containing from 1 to about 8 carbon
atoms, and any remaining R.sup.1 and R.sup.2 radicals are aryl
radicals.
[0048] In an even more specific embodiment, at least about 50% of
the total number of R.sup.1 and R.sup.2 radicals are methyl
radicals and the remaining are aryl radicals such as phenyl
radicals. In another embodiment herein the R.sup.1 and R.sup.2
radicals are selected from alkyl radicals containing from 1 to
about 8 carbon atoms such as methyl or a mixture of alkyl radicals
containing from 1 to about 8 carbon atoms and fluoroalkyl radicals
such as 3,3,3-trifluoropropyl.
[0049] The air and water barrier sealant composition herein further
comprises (2) up to about 20 wt. %, specifically from 1 wt. % to
about 15 wt. %, and most specifically from about 3 wt. % to about
10 wt. % of a treated fumed silica reinforcing filler.
[0050] In one embodiment herein the treated fumed silica
reinforcing filler is a fumed silica that has been treated with
cyclic siloxanes, such as D4 and/or with silazanes, such as
hexamethyldisilazane (HMDZ), as is well known in the art.
[0051] The air and water barrier sealant composition herein further
comprises (3) up to about 60 wt. %, specifically from about 10 wt.
% to about 50 wt. %, and most specifically from about 25 wt. % to
about 45 wt. % of at least one of a stearic acid treated ground
calcium carbonate extending filler; and, a precipitated calcium
carbonate filler.
[0052] The air and water barrier sealant composition herein further
comprises (4) about 0.5 wt. % to about 10 wt. %, specifically from
about 1.0 wt. % to about 5 wt. %, and most specifically from about
1.5 wt. % to about 3.0 wt. % of a polyalkoxy crosslinking agent
having the general formula (II):
(R.sup.1O).sub.4-a--Si--R.sup.2.sub.a (II)
where R.sup.1 and R.sup.2 are as defined in formula (I) where "a"
can be 0, 1, or 2.
[0053] Particular compounds that fall within the scope of formula
(II) are selected from the group consisting of
methyltrimethoxysilane, vinyltrimethoxysilane, tetramethoxysilane,
methyltriethoxysilane, vinyltrimethoxysilane and tetraethoxysilane.
In a most specific embodiment, the polyalkoxy silane crosslinking
agent is methyltrimethoxysilane.
[0054] The air and water barrier sealant composition herein further
comprises (5) from about 0.05 wt. % to about 5 wt. %, specifically,
from about 0.1 wt. % to about 3.0 wt. % and most specifically from
about 0.5 wt. % to about 2.0 wt. % of a titanium chelate
condensation cure catalyst having the general formula (III):
##STR00006##
wherein Me, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, s and t
are as defined above.
[0055] In formula (III), "s" is in the range of about 0.7 to about
1.3. In one specific embodiment herein "s" is from about 0.8 to
about 1.2 and t is from about 1.2 to about 0.8, in a most specific
embodiment s is equal to 1, and t is equal to 1. In one particular
embodiment of the present invention, the composition contains a
titanium chelate wherein R.sup.6 is propylene and R.sup.3 is
hydrogen, R.sup.2 and R.sup.4 are methyl and R.sup.5 is ethyl.
[0056] In one embodiment, R.sup.6 is a divalent hydrocarbon radical
containing from about 2 to about 20 carbon atoms and may be
substituted with a hydrocarbon group of up to 8 carbon atoms,
including halohydrocarbon groups and carboxyl groups and, in
addition to hydrocarbon substituent groups, the non-terminal
moieties of the R.sup.6 group may include other substituent groups
such as at least one of a halogen, cyano, nitro, carboxy ester and
acyl group.
[0057] In one specific non-limiting embodiment, the total number of
carbon atoms in the R.sup.6 group does not exceed about 20 carbon
atoms. The preparation of compounds of formula (III) are described
in U.S. Pat. Nos. 3,689,454 and 3,779,986 both of which are
incorporated herein by reference.
[0058] Most specifically the titanium chelate catalyst herein is
represented by the structure (IV):
##STR00007##
where, most specifically "s" and "t" are 1.
[0059] The air and water barrier sealant composition herein further
comprises 6) up to about 5 wt. %, specifically from about 0.1 wt. %
to about 2.0 wt. %, and most specifically from about 0.2 wt. % to
about 0.7 wt. % of an organofunctional polyalkoxysilane adhesion
promoter having the general formula (V):
##STR00008##
wherein R.sup.11 and R.sup.12 are monovalent hydrocarbon radicals
containing up to about 8 carbon atoms, t is 0 to about 3 and Z is a
saturated, unsaturated, or aromatic hydrocarbon of up to about 30
carbon atoms, specifically about 12 carbon atoms, more specifically
about 8 carbon atoms, which is further functionalized by a group
selected from the group consisting of amino, ether, epoxy,
glycidoxy, isocyanato, cyano, acryloxy, methacryloxy and
acyloxy.
[0060] Adhesion promoting compounds, within the scope of formula
(V), and suitable for use herein, as well as methods for preparing
them, are disclosed, for example, in U.S. Pat. Nos. 4,483,973;
4,528,353; 3,821,218 and 4,100,129 each of which are incorporated
herein by reference.
[0061] In addition to, or alternatively to compounds of the formula
(V), the air and water barrier sealant composition herein can
alternatively, or in addition, comprise an isocyanato-functional
polyalkoxy silane adhesion promoter.
[0062] Isocyanato-functional polyalkoxy silane adhesion promoters
suitable for use herein have the general formula (VI):
##STR00009##
[0063] wherein G is selected from R.sup.11 radicals as defined
above, styryl, vinyl, allyl, chloroallyl, cyclohexenyl, and
radicals having the general formula (VII)
##STR00010##
where R.sup.11 and R.sup.12 are as defined above, and R.sup.15 is a
divalent hydrocarbon radical selected from alkylenearylene,
alkylene, cycloalkylene and halogenated alkylenearylene each
containing from 2 to about 12 carbon atoms, where b varies from 0
to about 3.
[0064] wherein R.sup.13 and R.sup.14 are each either a monovalent
hydrocarbon radical containing up to about 8 carbon atoms or a
monovalent cyanoalkyl radical containing up to 8 carbon atoms,
[0065] wherein R.sup.15 is as defined above, and where b varies
from 0 to about 3.
[0066] Most specifically the adhesion promoter within the scope of
formula (VI) is 1,3,5-tristrimethoxysilylpropylisocyanurate. This
compound can be prepared by taking the corresponding alkoxy hydride
silane and reacting it with the unsaturated isocyanurate or
cyanurate in the presence of a platinum catalyst whereupon the
hydride adds on to the unsaturated group such as the allyl group of
the isocyanurate nucleus.
[0067] Other specific compounds within the scope of formula (VI)
above are selected from the group consisting of
bis-1,3-trimethoxysilylpropylisocyanurate;
1,3,5-tristrimethoxysilylethylisocyanurate;
1,3,5-trismethyldimethoxysilylpropylisocyanurate; and
1,3,5-trismethyldiethoxysilylpropylisocyanurate, and combinations
thereof.
[0068] The isocyanato-functional alkoxysilane adhesion promoter of
formula (VI) can be present in the RTV compositions herein in an
amount of up to about 2.0 wt. %, specifically from about 0.1 wt. %
to about 1.0 wt. %, and most specifically from about 0.3 wt. % to
about 0.7 wt. %.
[0069] In one non-limiting embodiment, the air and water barrier
sealant composition herein can comprise adhesion promoters selected
from the group consisting of
1,3,5-tristrimethoxysilylpropylisocyanurate,
bis-1,3-trimethoxysilylpropylisocyanurate,
1,3,5-tristrimethoxysilylethylisocyanurate,
1,3,5-trismethyldimethoxysilylpropylisocyanurate,
1,3,5-trismethyldiethoxysilylpropylisocyanurate,
n-2-aminoethyl-3-aminopropyltriethoxysilane,
methacryloxypropyltrimethoxysilane,
methylaminopropyltrimethoxysilane,
.gamma.-glycidoxypropylethyldimethoxysilane,
.gamma.-glycidoxypropyltrimethoxysilane,
.gamma.-glycidoxyethyltrimethoxysilane,
.beta.-(3,4-epoxycyclohexyl)propyltrimethoxysilane,
.beta.-(3,4-epoxycyclohexyl) ethylmethyldimethoxysilane,
isocyanatopropyltriethoxysilane,
isocyanatopropylmethyldimethoxysilane,
.beta.-cyanoethyltrimethoxysilane,
.gamma.-acryloxypropyltrimethoxysilane,
.gamma.-methacryloxypropylmethyldimethoxysilane,
4-amino-3,3,-dimethylbutyltrimethoxysilane,
n-ethyl-3-trimethoxysilyl-2-methylpropanamine, and combinations
thereof.
[0070] The air and water barrier sealant composition herein can
optionally further comprise up to about 60 wt. %, specifically from
about 5 wt. % to about 40 wt. %, and most specifically from about
15 wt. % to about 25 wt. % of a hydrocarbon processing aid
comprising, based on 100 parts by weight of the hydrocarbon fluid,
greater than 40 parts by weight cyclic paraffinic hydrocarbons and
less than 60 parts by weight noncyclic paraffinic hydrocarbons.
[0071] In one specific embodiment of the present invention, the
hydrocarbon fluid comprises one or more cyclic paraffinic
hydrocarbons containing about 5 to about 24 carbon atoms per
molecule and, optionally, one or more non-cyclic paraffinic
hydrocarbons containing from about 5 to about 24 carbons per
molecule. In one specific embodiment of the present invention, the
cyclic and non-cyclic hydrocarbons of the hydrocarbon fluid each
contain from about 8 to about 20, more specifically, from about 10
to about 15 carbon atoms per molecule.
[0072] Suitable cyclic paraffinic hydrocarbons include, but are not
limited to, cyclohexane, cyclooctane, cyclononane, cyclododecane
and combinations thereof. Suitable non-cyclic paraffinic
hydrocarbons include but are not limited to n-heptane, n-octane,
iso-octane, n-nonane, n-decane, n-undecane, n-dodecane, iso-decane,
n-heptadecane, n-octadecane, n-eicosane, isoeicosane and
combinations thereof. In a specific embodiment of the composition
herein, the hydrocarbon fluid comprises less than about 0.5% by
weight aromatic hydrocarbons.
[0073] In one further embodiment, the air and water barrier sealant
composition herein can optionally further comprise other additives
including, for example, flame-retardants, fungicides, pigments,
colorants, and the like.
[0074] There is also provided herein a wall assembly comprising the
one-part room temperature vulcanizing (RTV) silicone based air and
water barrier composition herein. The wall assembly described
herein can comprise the use of the one-part room temperature
vulcanizing (RTV) silicone based air and water barrier composition
as an adhesive to bond elastomer material(s) to construction
sheathing substrate(s), metal substrate(s) such as painted or
unpainted aluminum substrates, galvanized metal substrate(s), wood
framing substrate(s) and the like.
[0075] As discussed herein, the compositions of the present
invention can be used in construction as a one-part room
temperature vulcanizing (RTV) silicone polymer air and water
sealant composition. Set forth below are various construction
applications of the composition of the present invention followed
by experimental data showing unexpected favorable results
realized.
EXPERIMENTAL
[0076] To expand an understanding of the present invention the
examples below are provided.
Example 1
[0077] The silicone coating material as the adhesive (base) to
adhere a Red 0.022 inch thick and Grey 0.015 inch thick heat cure
elastomer to a glass fiber sheathing substrate (DensGlass.RTM.
sheathing substrate). The substrate surface was prepared in
accordance with method P15. (To test the substrate(s) as received,
no surface preparation=P15. To test using a natural bristle brush
to remove dirt/dust debris=P9.)
[0078] The silicone coating material used comprised by weight
percent: [0079] (a) 14.6% of a 25,000 cps silanol terminated
polydimethylsiloxane polymer. [0080] (b) 17.9% of a 3,000 cps
silanol-terminated polydimethylsiloxane polymer. [0081] (c) 39.0%
stearic acid treated ground calcium carbonate filler; [0082] (d)
3.6% D.sub.4 and HMDZ treated fumed silica filler (88318-MOMENTIVE)
[0083] (e) 20.8% of a C.sub.12-C.sub.20 linear organic aliphatic
solvent (CONOSOL C200 FROM PENRECO) [0084] (f) 0.47% of tris
(trimethoxysilylpropyl) isocyanurate adhesion promoter; [0085] (g)
2.37% methyltrimethoxysilane; and, [0086] (h) 1.26% diisopropoxy
titanium bis(acetylacetonate) cure catalyst. The silicone coating
mixture was made in a continuous compounding extruder
[0087] Example 1: The resulting outcome (shown in FIG. 1) exhibited
curling with both the Red and Grey elastomer as the Silicone
Coating material began to crosslink for the adhesive (base). Point
Contact Adhesion of both the Red and Grey elastomer was observed.
In this example, it was attempted to determine if the freshly "wet"
applied silicone coating could be used as the adhesive (base)
instead of a silicone sealant. The observation outcome resulted in
both the red and grey elastomer curled to freshly "wet" applied
silicone coating.
Example 2
[0088] To expand an understanding of the combination for the
product(s)/detail condition, a Silicone Sealant (SCS2000) comprised
of: [0089] (a) 34% of a 130,000 cps silanol terminated
polydimethylsiloxane polymer. [0090] (b) 44.0% stearic acid treated
ground calcium carbonate filler; [0091] (c) 4.5% D.sub.4 treated
fumed silica filler (88049-MOMENTIVE) [0092] (d) 14% of a linear,
trimethylstopped PDMS fluid [0093] (e) 0.30% of tris
(trimethoxysilylpropyl) isocyanurate adhesion promoter; [0094] (f)
2.2% methyltrimethoxysilane; and, [0095] (j) 1% propanediol
titanium (acetylacetonate) (ethylacetoacetate) cure catalyst; was
continuously mixed in a compounding extruder.
[0096] SCS2000 is a thixotropic paste and was utilized as the
adhesive (base) to adhere a Red 0.022 inch thick and Grey 0.015
inch thick heat cure elastomer to a glass fiber sheathing substrate
(DensGlass.RTM. sheathing substrate). The substrate surface was
prepared in accordance with method P15.
[0097] Example 2: The resulting outcome (shown in FIG. 2) exhibited
no curling of the Red and Grey elastomer using neutral cure
Silicone Sealant as the adhesive (base) during the cure process.
Full contact adhesion of both the Red and Grey elastomer was
observed.
Example 3
[0098] To expand an understanding of the combination for the
product(s)/detail condition, Silicone Sealant SCS2000 as described
above was utilized as the adhesive (base) to adhere a Red 0.022
inch thick and Grey 0.015 inch thick heat cure elastomer at a 90
Degree Angle to a painted aluminum substrate, as pictured below
(Example 3). The painted metal was used only for the purpose to
have a smooth finish to ascertain if the heat cure elastomer would
curl with the sealant as was observed when tested with the silicone
coating. The substrate surface was prepared in accordance with
method P15.
[0099] Example 3: The resulting outcome (shown in FIG. 3) exhibited
no curling of the Red and Grey elastomer using neutral cure
Silicone Sealant as the adhesive (base) during the cure process.
Adhesion of both the Red and Grey elastomer was observed.
Example 4
[0100] To expand an understanding for the combination of the
product(s)/detail condition, one silicone coating material
(SEC2400), three sealants (SilPruf SCS2000, SCS2700 and SCS9000)
and MS polymer sealant (SCS7000) were utilized as the adhesive
(base) to perform a (dry) adhesion test to a DensGlass.RTM. glass
fiber sheathing substrate which substrate had its surface prepared
in accordance with method P15 Prior to conducting adhesion pull
test(s) both the coating and sealants cured for 14 days after
application.
[0101] The SEC2400 formulation was given in example 1.
[0102] The SCS2000 composition was given in example 2.
[0103] The SCS2700 composition is: [0104] (a) 34% of a 130,000 cps
silanol terminated polydimethylsiloxane polymer. [0105] (b) 40.0%
stearic acid treated ground calcium carbonate filler; [0106] (c)
4.5% D.sub.4 treated fumed silica filler (88049-MOMENTIVE) [0107]
(d) 18% of a linear, trimethylstopped PDMS fluid [0108] (e) 0.30%
of tris (trimethoxysilylpropyl) isocyanurate adhesion promoter;
[0109] (f) 2.2% methyltrimethoxysilane; and, [0110] (g) 1%
propanediol titanium (acetylacetonate) (ethylacetoacetate) cure
catalyst. The above SCS2700 ingredients were continuously mixed in
a compounding extruder.
[0111] The SCS9000 composition is: [0112] (a) 48% of a 80,000 cps
silanol and methyl terminated polydimethylsiloxane polymer. [0113]
(b) 44.0% stearic acid treated ground calcium carbonate filler;
[0114] (c) 4.5% D.sub.4 treated fumed silica filler
(88049-MOMENTIVE) [0115] (d) 0.30% of tris (trimethoxysilylpropyl)
isocyanurate adhesion promoter; [0116] (e) 2.2%
methyltrimethoxysilane; and, [0117] (f) 1% propanediol titanium
(acetylacetonate) (ethylacetoacetate) cure catalyst. The above
SCS9000 ingredients are continuously mixed in a compounding
extruder.
[0118] The SCS7000 composition is: [0119] (a) 28.5% of a
methyldimethoxysilyl terminated polyether polymer; [0120] (b) 20%
of diisodecylphthalate; [0121] (c) 2% TiO2; [0122] (d) 30%
UltraPflex stearic acid treated precipitated calcium carbonate;
[0123] (e) 15% Hi-Pflex 100 stearic acid treated ground calcium
carbonate; [0124] (f) 3% methyltrimethoxysilane crosslinker; [0125]
(g) 1% aminoethylaminopropyltrimethoxysilane adhesion promoter;
and, [0126] (h) 0.5% solubilized dibutyltinoxide cure catalyst.
[0127] The above SCS7000 ingredients were mixed together using a
500-gallon planetary batch mixer. In one embodiment, SCS7000 was
primarily tested to determine compatibility to the silicone coating
SEC2400 and to determine its adhesion characteristics to the
substrates tested.
[0128] Example 4: The resulting outcome (shown in FIG. 4) exhibited
with the identified silicone coating and sealant to glass fiber
sheathing substrate failed within itself. Because the bond strength
of the silicone coating and the sealant was greater than the
component materials of the glass fiber sheathing, hence causing the
substrate to fail within itself. Adhesion was fully attained.
Example 5
[0129] To expand an understanding for the combination of the
product(s)/detail condition a silicone coating material SilShield
SEC2400 was used as the adhesive to perform an adhesion test to a
galvanized metal substrate. Prior to conducting adhesion pull test,
the silicone coating cured for 14 days after application. The
photograph in FIG. 5 shows that the adhesive bond of the silicone
material(s) is stronger than the substrate itself. That is, when
the sealant is tested (to see if it adheres to the underlying
substrate) by pulling the sealant away from the substrate, the
substrate is pulled away (the photos show yellow glass fibers in
the sealant bond area).
[0130] Example 5: The silicone coating attained adhesion to the
galvanized metal when it was preceded with the xylene or acetone
wipe procedure. The silicone coating attained minimal or no
adhesion when it was preceded by the (IPA) isopropyl alcohol wipe
procedure.
[0131] The solvent wipe procedure (using the respective solvents)
for galvanized metal was as follows:
[0132] Dual-Rag Solvent Wipe procedure was as follows: A rag wetted
with solvent was used to wipe the surfaces. Immediately follow the
wet rag wipe a clean dry rag wipe was used to carry away any
contaminants that were removed/dissolved from the wet rag wipe.
[0133] The photo in FIG. 5A shows the results following the "P2-P5"
procedure (a xylene wipe followed by a dry wipe as the surface
cleaning preparation) and the photo in FIG. 5B shows the results
following the "Ace-P5" (an acetone wipe followed by a dry wipe as
the surface cleaning preparation) with cohesive failure of the
silicone materials; revealing that when utilizing these cleaning
preparatory steps, the adhesive bond to the underlying material
(galvanized metal in this case) is stronger than the silicone
material itself; tearing the silicone material during the test.
This is compared to the photo in FIG. 5C, with the specimen labeled
as "A" which received a "P1-P5" surface prep (isopropyl alcohol
wipe followed by a dry wipe as the surface cleaning preparation).
This combination of surface preparation and silicone material when
tested for adhesion revealed that the silicone material released
adhesively from the underlying substrate when tested (an
undesirable result). The primary purpose of the silicone coating
tests was to ascertain if primerless adhesion could be achieved to
substrates. Specimen C in FIG. 5D was tested with Primer.
Example 6
[0134] To expand an understanding for the combination of the
product(s)/detail condition a miniature wood stud framed mock-up
utilizing a silicone sealant as the adhesive (base) to adhere an
elastomer transition strip to the wood stud framing and glass fiber
sheathing substrate, wherein surface preparation method P15 was
preformed, to simulate a rough wall opening. As pictured below
(FIGS. 6a, 6b and 6c):
Example 6: The resulting outcome exhibited consistent transition of
the Silicone Sealant as the adhesive (base) to adhere the elastomer
to the Wood Stud Framing and Glass Fiber Sheathing Substrate, and a
Silicone Coating applied over elastomer to the Wood Stud Framing
and Glass Fiber Sheathing Substrate.
Adhesion Test Results
[0135] Adhesion testing is conducted according to ASTM C 794
(modified), Adhesion in Peel of Elastomeric Joint Sealants. Testing
is conducted on each substrate with and without primer for each
sealant tested. Results in the table(s) below are based on 14-day
ambient condition cure. Results of the substrates and sealants are
shown in the table(s) below.
CA09-1583 Glass Fiber Sheathing Substrate
TABLE-US-00001 [0136] TABLE 1 Cure Cure Legend Submitted Substrate
Condition Time Sealant Primer (prep) Adhesion % Comments: Glass
Fiber Sheathing RT Cure 14 days A2 W/O P9 90% Adhesion observed.
Glass Fiber Sheathing RT Cure 14 days A2 W/O P9 80% Adhesion
observed. Glass Fiber Sheathing RT Cure 14 days A2 W/O P9 100%
Adhesion observed. Glass Fiber Sheathing RT Cure 14 days A1 W/O P9
100% Adhesion observed. Glass Fiber Sheathing RT Cure 14 days A2
W/O P15 95% Adhesion observed. Glass Fiber Sheathing RT Cure 14
days A2 W/O P15 85% Adhesion observed. Glass Fiber Sheathing RT
Cure 14 days A2 W/O P15 100% Adhesion observed. Glass Fiber
Sheathing RT Cure 14 days A1 W/O P15 95% Adhesion observed. Glass
Fiber Sheathing RT Cure 14 days A2 SS4044P P9 90% Adhesion
observed. Glass Fiber Sheathing RT Cure 14 days A2 SS4044P P9 80%
Adhesion observed. Glass Fiber Sheathing RT Cure 14 days A2 SS4044P
P9 100% Adhesion observed. Glass Fiber Sheathing RT Cure 14 days A1
SS4044P P9 100% Adhesion observed. Glass Fiber Sheathing RT Cure 14
days A2 SS4044P P15 95% Adhesion observed. Glass Fiber Sheathing RT
Cure 14 days A2 SS4044P P15 85% Adhesion observed. Glass Fiber
Sheathing RT Cure 14 days A2 SS4044P P15 100% Adhesion observed.
Glass Fiber Sheathing RT Cure 14 days A1 SS4044P P15 95% Adhesion
observed. LEGEND A1 = Silicone sealant SCS2000 A2 = Silicone
coating SilShield SEC2400 RT Cure--14-day ambient condition cure
W/O--without primer applied SS4044P = Momentive Primer P9--natural
bristle brush used on surface P15--as received (no surface
preparation) Legend for Adhesion Rating 0-100% percent cohesive
failure SF = substrate failure P = pass rating adhesion
Adhesion Test Results
[0137] Adhesion testing is conducted to ASTM C 794 (modified),
Adhesion in Peel of Elastomeric Joint Sealants. Testing is
conducted on each substrate with and without primer for each
sealant tested. Results in the table(s) below are typically based
on 14-day ambient condition cure, 1-day water immersion and 7-day
water immersion. The substrate with silicone product is completely
immersed into water. After the sample has been immersed for 1 day
the silicone product is assessed for adhesion values. The substrate
is then placed back into water immersion for an additional 6 days
for a total of 7 days water immersion from which the silicone
product is assessed for adhesion values. Results of the substrates
and sealants are shown in the table(s) below.
CA10-1692 Galvanized Break Metal--which is sheet metal which is
simply metal formed into thin and flat pieces; the metal is cleaned
then coated with a galvanized treatment to prevent rust.
TABLE-US-00002 TABLE 2 Cure Cure Legend Submitted Substrate
Condition Time Sealant Primer (prep) Adhesion % Comments:
Galvanized Break RT Cure 14 days A1 W/O A-P5 90% Adhesion Metal
observed Galvanized Break 1 day water 15 days A1 W/O A-P5 90%
Adhesion Metal observed. Galvanized Break 7 day water 21 days A1
W/O A-P5 98% Adhesion Metal observed. Galvanized Break RT Cure 14
days A1 SS4044P A-P5 100% Adhesion Metal observed. Galvanized Break
1 day water 15 days A1 SS4044P A-P5 100% Adhesion Metal observed.
Galvanized Break 7 day water 21 days A1 SS4044P A-P5 100% Adhesion
Metal observed. Galvanized Break RT Cure 14 days A1 W/O P2-P5 90%
Adhesion Metal observed. Galvanized Break 1 day water 15 days A1
W/O P2-P5 100% Adhesion Metal observed. Galvanized Break 7 day
water 21 days A1 W/O P2-P5 100% Adhesion Metal observed. Galvanized
Break RT Cure 14 days A1 SS4044P P2-P5 100% Adhesion Metal
observed. Galvanized Break 1 day water 15 days A1 SS4044P P2-P5
100% Adhesion Metal observed. Galvanized Break 7 day water 21 days
A1 SS4044P P2-P5 100% Adhesion Metal observed. Galvanized Break RT
Cure 14 days A1 W/O P1-P5 80% Adhesion Metal observed. Galvanized
Break 1 day water 15 days A1 W/O P1-P5 95% Adhesion Metal observed.
Galvanized Break 7 day water 21 days A1 W/O P1-P5 85% Adhesion
Metal observed. Galvanized Break RT Cure 14 days A1 SS4044P P1-P5
100% Adhesion Metal observed. Galvanized Break 1 day water 15 days
A1 SS4044P P1-P5 100% Adhesion Metal observed. Galvanized Break 7
day water 21 days A1 SS4044P P1-P5 100% Adhesion Metal observed.
Galvanized Break RT Cure 14 days A2 W/O A-P5 90% Adhesion Metal
observed. Galvanized Break 1 day water 15 days A2 W/O A-P5 90%
Adhesion Metal observed. Galvanized Break 7 day water 21 days A2
W/O A-P5 98% Adhesion Metal observed. Galvanized Break RT Cure 14
days A2 SS4044P A-P5 100% Adhesion Metal observed. Galvanized Break
1 day water 15 days A2 SS4044P A-P5 100% Adhesion Metal observed.
Galvanized Break 7 day water 21 days A2 SS4044P A-P5 100% Adhesion
Metal observed. Galvanized Break RT Cure 14 days A2 W/O P2-P5 90%
Adhesion Metal observed. Galvanized Break 1 day water 15 days A2
W/O P2-P5 100% Adhesion Metal observed. Galvanized Break 7 day
water 21 days A2 W/O P2-P5 100% Adhesion Metal observed. Galvanized
Break RT Cure 14 days A2 SS4044P P2-P5 100% Adhesion Metal
observed. Galvanized Break 1 day water 15 days A2 SS4044P P2-P5
100% Adhesion Metal observed. Galvanized Break 7 day water 21 days
A2 SS4044P P2-P5 100% Adhesion Metal observed. Galvanized Break RT
Cure 14 days A2 W/O P1-P5 10% Poor Metal adhesion observed.
Galvanized Break 1 day water 15 days A2 W/O P1-P5 0% No Metal
adhesion observed. Galvanized Break 7 day water 21 days A2 W/O
P1-P5 35% Poor Metal adhesion observed. Galvanized Break RT Cure 14
days A2 SS4044P P1-P5 100% Adhesion Metal observed. Galvanized
Break 1 day water 15 days A2 SS4044P P1-P5 100% Adhesion Metal
observed. Galvanized Break 7 day water 21 days A2 SS4044P P1-P5
100% Adhesion Metal observed. LEGEND A1 and A2 defined as in Table
1 RT Cure--14 Day Ambient Condition Cure W/O--Without Primer
Applied P1--Isopropyl Alcohol Wipe*(IPA) P2--Xylene Wipe P5--Dry
Wipe A--Acetone/Dry Wipe Legend for Adhesion Rating 0-100% percent
cohesive failure P = Pass Rating Adhesion F = Total Adhesive
Failure
CA09-1583 DensGlass.RTM. Gold Sheathing Substrate
TABLE-US-00003 [0138] TABLE 3 Submitted Cure Cure Legend Force
Substrate Condition Time Sealant Primer (prep) (lbs/inch) Adhesion
% Rating Comments: DensGlass Gold RT Cure 14 days SCS2000 W/O P9
T11 90% SF Adhesion observed. DensGlass Gold RT Cure 14 days
SCS2700 W/O P9 T11 80% SF Adhesion observed. DensGlass Gold RT Cure
14 days SCS9000 W/O P9 T11 100% P Adhesion observed. DensGlass Gold
RT Cure 14 days SCS7000 W/O P9 T11 98% SF Adhesion observed.
DensGlass Gold RT Cure 14 days SEC2400 W/O P9 T11 100% P Adhesion
observed. DensGlass Gold RT Cure 14 days SCS2000 W/O P15 T11 95% SF
Adhesion observed. DensGlass Gold RT Cure 14 days SCS2700 W/O P15
T11 85% SF Adhesion observed. DensGlass Gold RT Cure 14 days
SCS9000 W/O P15 T11 100% P Adhesion observed. DensGlass Gold RT
Cure 14 days SCS7000 W/O P15 T11 100% SF Adhesion observed.
DensGlass Gold RT Cure 14 days SEC2400 W/O P15 T11 95% SF Adhesion
observed. RT, W/O, Adhesion %, P, P9 and P15 are as defined above.
SF = substrate failed within itself T11 = beads of sealant/coating
at a given thickness applied onto the substrate The sealant
thickness in Table 3 is approximately 0.125 inches and the coating
thickness in table 4 is approximately 12 (dry) mils
CA10-1692 Galvanized Break Metal
TABLE-US-00004 [0139] TABLE 4 Submitted Cure Cure Legend Force
Substrate Condition Time Sealant Primer (prep) (lbs/inch) Adhesion
% Rating Comments: Galvanized Break RT Cure 14 days SEC2400.04 W/O
A-P5 T11 90% P Adhesion observed. Metal Galvanized Break 1 day
water 15 days SEC2400.04 W/O A-P5 T11 90% P Adhesion observed.
Metal Galvanized Break 7 day water 21 days SEC2400.04 W/O A-P5 T11
98% P Adhesion observed. Metal Galvanized Break RT Cure 14 days
SEC2400.04 W/O P2-P5 T11 90% P Adhesion observed. Metal Galvanized
Break 1 day water 15 days SEC2400.04 W/O P2-P5 T11 100% P Adhesion
observed. Metal Galvanized Break 7 day water 21 days SEC2400.04 W/O
P2-P5 T11 100% P Adhesion observed. Metal Galvanized Break RT Cure
14 days SEC2400.04 W/O P1-P5 T11 10% F Poor adhesion observed.
Metal Galvanized Break 1 day water 15 days SEC2400.04 W/O P1-P5 T11
0% F No adhesion observed. Metal Galvanized Break 7 day water 21
days SEC2400.04 W/O P1-P5 T11 35% F Poor adhesion observed. Metal
Galvanized Break RT Cure 14 days SCS2000 W/O P1-P5 38.0 80% P
Adhesion observed. Metal Galvanized Break 1 day water 15 days
SCS2000 W/O P1-P5 44.0 95% P Adhesion observed. Metal Galvanized
Break 7 day water 21 days SCS2000 W/O P1-P5 42.0 85% P Adhesion
observed. Metal RT, W/O, Adhesion %, P, P1, P2, P5 and T11 are as
defined above. SEC2400.04 = SEC2400 with the .04 portion of
SEC2400.04 indicating a limestone color.
Test Methods
[0140] The test specimens were evaluated in accordance with the
following methods:
ASTM D 1653-03, Standard Test Methods for Water Vapor Transmission
of Organic Coating Films, Wet Cup Method.
ASTM D 1970-09, Standard Specification for Self-Adhering Polymer
Modified Bituminous Sheet Materials Used as Steep Roofing
Underlayment for Ice Dam Protection, Self Sealability Test.
ASTM E 2178-03, Standard Test Method for Air Permeance of Building
Materials.
[0141] The test specimens were evaluated in general accordance with
the following methods:
ASTM D 4541-09, Standard Test Method for Pull-Off Strength of
Coatings Using Portable Adhesion Testers.
ASTM D7234-05, Standard Test Method for Pull-Off Adhesion Strength
of Coatings on Concrete Using Portable Pull-Off Adhesion
Testers.
Product: SilShield AWB Silicone Air & Water Barrier Coating
(SilShield AWB)=SEC2400.
TABLE-US-00005 [0142] TABLE 5 SilShield AWB at 17 mil Dry Thickness
Parameter Test Result Water Vapor Permeance 5.5 perms ASTM D
1653-03 Self sealability around nails Pass ASTM D 1979-09
TABLE-US-00006 TABLE 6 SilShield AWB at 12 mil Dry Thickness
Parameter Test Results Water vapor permeance ASTM D 1653-03 8.4
perms Self sealability around nails ASTM D 1979-09 Fail Calculated
air permeance at 25 Pa ASTM E 2178-03 <0.00001 L/Pa m.sup.2 s
Calculated air permeance at 50 Pa ASTM E 2178-03 <0.00001 L/Pa
m.sup.2 s Calculated air permeance at 75 Pa ASTM E 2178-03
<0.00001 L/Pa m.sup.2 s Calculated air permeance at 100 Pa ASTM
E 2178-03 <0.00001 L/Pa m.sup.2 s Calculated air permeance at
150 Pa ASTM E 2178-03 <0.00001 L/Pa m.sup.2 s Calculated air
permeance at 300 Pa ASTM E 2178-03 <0.00001 L/Pa m.sup.2 s
Tensile Stress at Maximum Load-Dens-Glass Substrate* 33.1 psi
Tensile Stress at Maximum Load-Concrete Substrate 112.1 psi *Full
strength of silicone not realized due to the failure of Dens-Glass
substrate prior to coating failure.
Test Procedures and Test Results: The results are reported in the
following tables. All test conditions were at standard laboratory
conditions unless otherwise noted.
Water Vapor Permeance--Wet Cup Method
[0143] The test specimen film was secured between two gaskets to a
water-filled aluminum test dish. The resulting open area of each
test specimen for testing was 1.8 in.sup.2. The weights of the test
specimens were recorded once a day during normal business days
utilizing a Mettler Toldeo AX504 Balance (ICN 003449). The lab
environmental conditions were recorded at the same time. The
permeance was calculated in accordance with the test method. The
test for tables 7-8 was done under ASTM D 1653-03.
TABLE-US-00007 TABLE 7 SilShield AWB-17 mil Dry Thickness Test
Average Average Relative Permeance, Specimen Temperature, .degree.
C. (.degree. F.) Humidity, % perms 1 20.8 (69.4) 48.1 5.5 2 20.8
(69.4) 48.1 4.7 3 20.8 (69.4) 48.1 6.3 Average 5.5
TABLE-US-00008 TABLE 8 SilShield AWB-12 mil Dry Thickness Test
Average Average Relative Permeance, Specimen Temperature, .degree.
C. (.degree. F.) Humidity, % perms 1 20.8 (69.4) 48.1 8.0 2 20.8
(69.4) 48.1 8.9 3 20.8 (69.4) 48.1 8.4 Average 8.4
Self Sealability
[0144] The SilShield AWB coating was applied to
12''.times.12''.times.3/8'' thick APA Grade, Exposure 1 pieces of
plywood. The ASTM D 1970-09 test was performed with a water depth
of 5'' and at 4.degree. C..+-.2.degree. C. (40.degree.
F..+-.5.degree. F.) for a period of three days then the test
specimens were observed for water leakage.
TABLE-US-00009 TABLE 9 SilShield AWB-17 mil Dry Thickness Test
Specimen Observations Pass/Fail 1 No water in tub under test
specimen, on nail shanks, on underside Pass of plywood or between
plywood and SilShield AWB 2 No water in tub under test specimen, on
nail shanks, on underside Pass of plywood or between plywood and
SilShield AWB
TABLE-US-00010 TABLE 10 SilShield AWB-12 mil Dry Thickness Test
Specimen Observations Pass/Fail 1 Water in tub under test specimen,
and between plywood and Fail SilShield AWB; no water on nail shanks
or on underside of plywood 2 Water in tub under test specimen, on
nail shanks, on underside of Fail plywood and between plywood and
SilShield AWB
Air Permeance
[0145] The SilShield AWB coating was applied to 1/2'' thick
Dens-Glass. The test specimen was then prepared according to the
method ASTM E 2178-03 utilizing self-adhesive gaskets and 4 mil
thick polyethylene sheeting and placed SilShield AWB coated side up
on top of the test chamber (ICN 004933). The test specimen was
tightly secured to the top of the test chamber utilizing a metal
frame with a 1 meter.times.1 meter interior dimension to expose 1
meter.times.1 meter of the test specimen. The frame was secured by
several pressure clamps.
[0146] The test specimen was then tested at preset air pressures
ranging from 25 Pa to 300 Pa. Upon completion of the cycle, the
polyethylene sheet was sliced and peeled away from the test
specimen's surface. The test specimen was tested again at preset
air pressures ranging from 25 Pa to 300 Pa. The calculated flow
rate column in the table immediately below table 11 is an average
of the measured flow rates of specimens 1-5 at each respective air
pressure in table 11. Likewise, the calculated air permeance column
in the table immediately below table 11 is the mathematical product
of the average of the inverse of measured actual pressures for each
of specimens 1-5.
TABLE-US-00011 TABLE 11 SilShield AWB-12 mil Dry Thickness Air
Measured Flow Rate, L/(s m.sup.2) Pressure, Test Specimen Pa 1 2 3
4 5 25 <0.00001 <0.00001 <0.00001 <0.00001 <0.00001
50 <0.00001 <0.00001 <0.00001 <0.00001 <0.00001 75
<0.00001 <0.00001 <0.00001 <0.00001 <0.00001 100
<0.00001 0.000009 <0.00001 <0.00001 <0.00001 150
<0.00001 0.00030 <0.00001 <0.00001 <0.00001 300
<0.00001 0.00029 0.00018 0.00006 <0.00001 Air Calculated
Pressure, Calculated Flow Rate, Air Permeance, Pa L/(s m.sup.2)
L/(Pa m.sup.2 s) 25 <0.00001 <0.00001 50 <0.00001
<0.00001 75 <0.00001 <0.00001 100 0.00002 <0.00001 150
0.00006 <0.00001 300 0.00011 <0.00001
Error Analysis: Meaningful regression analysis could not be
performed due to the very low permeance through the test specimens.
The majority of the measured flow rates of the test specimens were
lower than the corresponding measured flow rates thus resulting in
a negative calculated permeance.
Air Permeance
(Continued)
TABLE-US-00012 [0147] Dens-Glass Only (One Specimen) Air Pressure,
Measured Flow Rate, Calculated Air Permeance, Pa L/(s m.sup.2)
L/(Pa m.sup.2 s) 25 0.00335 1.34 E-4 50 0.00726 1.45 E-4 75 0.01150
1.53 E-4 100 0.01495 1.50 E-4 150 0.02242 1.49 E-4 300 0.04488 1.50
E-4 Note: The air leakage of the Dens-Glass does not exceed 0.02
L/(s m.sup.2) at a pressure differential of 75 Pa for regular
gypsum board as outlined in Section 8.1.2 of ASTM E2178-03. The
actual pressure and flow values are presented in Appendix A.
TABLE-US-00013 APPENDIX A Test Specimen Actual Pressure and Flow
Values Target Pressure, Actual Pressure, Actual Flow, Pa Pa L/s
Appendix A Test Specimen 1 Tare (Leakage) 25 25.10370 0.00115 50
50.11327 0.00173 75 74.81364 0.00247 100 99.82074 0.00289 150
150.18632 0.00400 300 300.31243 0.00653 Test 25 24.93956 0.00064 50
50.06867 0.00151 75 75.36660 0.00195 100 100.09791 0.00284 150
149.82711 0.00364 300 300.03640 0.00643 Appendix A Test Specimen 2
Tare (Leakage) 25 24.94161 0.00150 50 50.20697 0.00254 75 75.19572
0.00372 100 99.66818 0.00451 150 149.47475 0.00594 300 301.16027
0.01030 Test 25 25.02425 0.00142 50 49.90279 0.00248 75 75.01252
0.00362 100 100.39615 0.00460 150 149.70303 0.00624 300 301.03016
0.01059 Appendix A Test Specimen 3 Tare (Leakage) 25 24.94980
0.00184 50 50.16573 0.00264 75 75.14905 0.00384 100 100.38617
0.00493 150 150.10671 0.00639 300 300.02593 0.01076 Test 25
25.04859 0.00133 50 50.18470 0.00263 75 75.30957 0.00383 100
100.07077 0.00464 150 150.05679 0.00630 300 300.47623 0.01094
Appendix A Test Specimen 4 Tare (Leakage) 25 24.93848 0.00349 50
50.11862 0.00540 75 74.64652 0.00754 100 100.17459 0.00919 150
149.89230 0.01292 300 300.96119 0.02123 Test 25 25.06189 0.00273 50
50.20727 0.00517 75 75.12398 0.00711 100 99.96632 0.00919 150
150.04643 0.01272 300 300.65762 0.02129 Appendix A Test Specimen 5
Tare (Leakage) 25 25.12002 0.00084 50 50.07670 0.00122 75 75.35053
0.00174 100 100.28851 0.00214 150 149.52513 0.00288 300 300.08907
0.00445 Test 25 25.05494 0.00031 50 50.20336 0.00071 75 75.19595
0.00127 100 100.07904 0.00189 150 150.11995 0.00239 300 300.14558
0.00412 Appendix A Dens-Glass Only Tare (Leakage) 25 24.96279
0.00187 50 49.90708 0.00326 75 75.18611 0.00407 100 99.63309
0.00547 150 149.91431 0.00746 300 301.29634 0.01351 Test 25
25.03834 0.00522 50 49.80435 0.01052 75 74.64378 0.01557 100
99.80172 0.02042 150 150.01917 0.02988 300 300.26842 0.05839
Pull-Off Strength
[0148] The SilShield AWB coating was applied to 1/2'' thick
Dens-Glass and CMU (Concrete Masonry Unit). After the SilShield AWB
coating had cured for two weeks, 1'' by 1'' t-blocks were adhered
to the test specimens with GE SilPruf SCS2003 silicone rubber
sealant. The CMU test specimens were scored through the SilShield
AWB to the substrate before testing. SCS2003 is the same as SCS2000
in example 2 but contains 3% carbon black colorant.
[0149] The tensile strength was determined utilizing an Instron
Model 3369 Universal Test Machine (ICN 005740) operating at a cross
head speed of 150 psi/s for the Dens-Glass substrate and 30 psi/s
for the CMU substrate. The data in Table 12 was obtained under test
method ASTM D 4541-09 and the data in Table 13 was obtained under
test method ASTM D7234-05. The stress strain results are easily
calculated since the test patch is one inch square--the force is
divided by the area, the square of one is one--the calculated
result is simply the force divided by one and the average values
are simply the sum of the tests divided by the number of individual
tests.
TABLE-US-00014 TABLE 12 SilShield AWB Applied on Dens-Glass-12 mil
Dry Thickness Test Maximum Tensile Stress at Specimen Load (lbs)
Maximum Load (psi) Comments 1 52.99 53.0 Peeled face off Dens-Glass
2 29.77 29.8 Peeled face off Dens-Glass 3 32.26 32.3 Peeled face
off Den-Glass and SCS2003 had cohesive failure 4 20.15 20.2 Peeled
face off Dens-Glass 5 30.12 30.1 Peeled face off Dens-Glass Average
33.06 33.1* *Full strength of silicone not realized due to the
failure of Dens-Glass substrate prior to coating failure.
TABLE-US-00015 TABLE 13 SilShield AWB applied on CMU-12 mil Dry
Thickness Test Maximum Tensile Stress at Specimen Load (lbs)
Maximum Load (psi) Comments 1 116.56 116.6 50% failure at the
coating/substrate interface 2 104.31 104.3 25% failure at the
coating/substrate interface 3 108.86 108.9 25% failure at the
coating/substrate interface 4 113.82 113.8 40% failure at the
coating/substrate interface 5 116.79 116.8 30% failure at the
coating/substrate interface Average 112.07 112.1
Conditions for Table 14 and FIG. 7
[0150] Test Speed=150.00000 psi/s
Lab Conditions=70.2.degree. F./48.4% R.H.
Frame=INSTRON 3369/005740
[0151] Load Cell 2kN/005742
TABLE-US-00016 TABLE 14 Measured Values Tensile stress at Specimen
Thickness Maximum Maximum ID Width (in) (in) Load (lbf) Load (psi)
Comment 1 SEC2400 1.00 1.00 52.99 53.0 Peeled face SilShield off
Dens- Glass 2 SEC2400 1.00 1.00 29.77 29.8 Peeled face SilShield
off Dens- Glass 3 SEC2400 1.00 1.00 32.26 32.3 Peeled face
SilShield off Dens- Glass and SCS200 had cohesive failure 4 SEC2400
1.00 1.00 20.15 20.2 Peeled face SilShield off Dens- Glass 5
SEC2400 1.00 1.00 30.12 30.1 Peeled face SilShield off Dens- Glass
Mean 1.00 1.00 33.06 33.1 Standard 0.00 0.00 12.08 12.08
Deviation
The tensile stress data in Table 14 can be plotted against tensile
strain (in/in) and the results for specimens 1-5. The data in Table
14 was obtained under test method ASTM D 4541-09 and the data in
Table 15 was obtained under test method ASTM D7234-05
Conditions for Table 15 and FIG. 8
[0152] Test Speed=30.00000 psi/s
Lab Conditions=70.2.degree. F./48.4% R.H.
Frame=INSTRON 3369/005740
[0153] Load Cell 2kN/005742
TABLE-US-00017 TABLE 15 Measured Values Tensile stress at Maximum
Specimen Thickness Maximum Load ID Width (in) (in) Load (lbf) (psi)
Comment 1 SEC2400 1.00 1.00 116.56 116.6 50% failure at the
SilShield- coating/substrate Concrete interface 2 SEC2400 1.00 1.00
104.31 104.3 25 failure at the SilShield- coating/substrate
Concrete interface 3 SEC2400 1.00 1.00 108.86 108.9 25 failure at
the SilShield- coating/substrate Concrete interface 4 SEC2400 1.00
1.00 113.82 113.8 40 failure at the SilShield- coating/substrate
Concrete interface 5 SEC2400 1.00 1.00 116.79 116.8 30 failure at
the SilShield- coating/substrate Concrete interface Mean 1.00 1.00
112.07 112.1 Standard 0.00 0.00 5.39 5.39 Deviation
The tensile stress data in Table 15 can be plotted against tensile
strain (in/in) and the results for specimens 1-5 are shown in FIG.
8
[0154] While the invention has been described with reference to a
specific embodiment, those skilled in the art will understand that
various changes may be made and equivalents may be substituted for
elements thereof without departing from the scope of the invention.
It is intended that the invention not be limited to the particular
embodiment disclosed as the best mode for carrying out this
invention, but that the invention will include all embodiments
falling within the scope of the appended claims. All citations
referred herein are expressly incorporated herein by reference.
* * * * *