U.S. patent application number 12/727459 was filed with the patent office on 2010-09-23 for flexible laminated hip and ridge shingle.
Invention is credited to Jennifer L. Frey, Lawrence J. Grubka, Jason D. Guerra, James E. Loftus, Donn R. Vermilion.
Application Number | 20100239807 12/727459 |
Document ID | / |
Family ID | 42736284 |
Filed Date | 2010-09-23 |
United States Patent
Application |
20100239807 |
Kind Code |
A1 |
Grubka; Lawrence J. ; et
al. |
September 23, 2010 |
FLEXIBLE LAMINATED HIP AND RIDGE SHINGLE
Abstract
A laminated asphalt shingle including a base layer, a first
decorative layer, and a second decorative layer is provided. The
first decorative layer may be affixed to the base layer and to the
second decorative layer by a flexible adhesive that permits the
first decorative layer to move relative to both the base layer and
the second decorative layer without de-bonding. The relative
movement of the shingle layers permits the shingle to be folded
over the ridge line of a roof without de-bonding or breaking the
layers. Additionally, the relative movement of the layers when the
shingle is installed over a ridge creates opposing transverse edges
in which each layer is offset from the other layers as a result of
the shingle bending about a different radius of curvature, thereby
providing a dimensional appearance along the transverse edges.
Inventors: |
Grubka; Lawrence J.;
(Westerville, OH) ; Frey; Jennifer L.; (Monclova,
OH) ; Loftus; James E.; (Newark, OH) ;
Vermilion; Donn R.; (Newark, OH) ; Guerra; Jason
D.; (Tinley Park, IL) |
Correspondence
Address: |
MacMillan, Sobanski & Todd, LLC
One Maritime Plaza, Fifth Floor, 720 Water Street
Toledo
OH
43604
US
|
Family ID: |
42736284 |
Appl. No.: |
12/727459 |
Filed: |
March 19, 2010 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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61161996 |
Mar 20, 2009 |
|
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61162111 |
Mar 20, 2009 |
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Current U.S.
Class: |
428/79 ;
428/101 |
Current CPC
Class: |
B32B 2255/26 20130101;
Y10T 428/24025 20150115; C09J 195/00 20130101; C08L 53/00 20130101;
B32B 3/26 20130101; C09J 11/06 20130101; C08L 95/00 20130101; B32B
2255/24 20130101; C08L 55/00 20130101; E04D 1/30 20130101; B32B
2419/06 20130101; E04D 1/20 20130101; E04D 1/26 20130101; C09J
11/08 20130101; B32B 7/12 20130101; B32B 1/00 20130101; B32B
2307/546 20130101; C08L 95/00 20130101; C08L 2666/04 20130101; C08L
95/00 20130101; C08L 2666/24 20130101 |
Class at
Publication: |
428/79 ;
428/101 |
International
Class: |
E04D 1/30 20060101
E04D001/30; B32B 3/06 20060101 B32B003/06 |
Claims
1. A shingle for use as a hip and ridge shingle: a base layer
having a first length dimension and a first width dimension; and a
first decorative layer having a second length dimension and a
second width dimension, wherein at least one of said second length
dimension and said second width dimension is the same as or smaller
than said first length dimension and said first width dimension,
and wherein said first decorative layer is affixed to said base
layer by a flexible adhesive that allows a movement of said first
decorative layer relative to said base layer without cracking or
breaking said first decorative layer.
2. The shingle of claim 1, further comprising: a second decorative
layer affixed to said first decorative layer by said flexible
adhesive, said flexible adhesive permitting said second decorative
layer to move relative to said first decorative layer without
cracking or breaking said first or second decorative layer.
3. The shingle of claim 1, wherein at least one of said second
length and width dimensions is the same as or smaller than the
corresponding first length and width dimension.
4. The shingle of claim 1, wherein said flexible adhesive
comprises: a hydrocarbonaceous material; a linear copolymer having
an A-B di-block or an A-B-A tri-block structure; and an oil.
5. The shingle of claim 4, wherein said oil is selected from
petroleum-based oils, naphthenic oils, paraffinic oils and
combinations thereof.
6. The shingle of claim 4, further comprising a member selected
from one or more fillers, a radial copolymer and combinations
thereof, said radial copolymer being selected from a block
copolymer having an (A-B).sub.n radial structure where n is an
integer of at least 4 and a block copolymer having a tri-block
(A-B-A) radial structure having from 4-8 arms.
7. The shingle of claim 6, wherein said radial copolymer is
selected from styrene-butadiene-styrene (SBS) radial copolymers and
styrene-isoprene radial copolymers, and wherein the copolymer
forming said linear copolymer is selected from styrene-butadiene
block copolymers and styrene-isoprene block copolymers.
8. The shingle of claim 4, wherein said adhesive provides
flexibility at temperatures as less than or equal to about
40.degree. F.
9. A hip and ridge shingle for covering a ridge line or hip of a
roof comprising: a base layer having a first length dimension and a
first width dimension; and a first decorative layer having a second
length dimension and a second width dimension, at least one of said
second length and width dimensions being smaller than the
corresponding first length and width dimensions, wherein said first
decorative layer is affixed to said base layer by a flexible
adhesive that allows a limited movement of said first decorative
layer relative to said base layer to permits said first decorative
layer to bend about a different radius of curvature than said base
member when said hip and ridge is bent over said ridge line or said
hip.
10. The hip and ridge shingle of claim 9, further comprising: a
second decorative member affixed to said first decorative member by
said flexible adhesive to allow a limited movement of said second
decorative layer relative to said first decorative layer, thus
allowing said second decorative layer to bend at a different radius
of curvature than said first decorative layer.
11. The hip and ridge shingle of claim 9, wherein each of said base
layer, said first decorative layer, and said second decorative
layer have opposing transverse edges, the corresponding said
transverse edges of said first decorative layer being offset
relative to said base layer and relative to said second decorative
layer when said hip and ridge shingle is installed on said ridge
line or said hip.
12. The hip and ridge shingle of claim 9, wherein said adhesive
provides flexibility at temperatures less than or equal to about
40.degree. F.
13. The hip and ridge shingle of claim 12, wherein said flexible
adhesive comprises: a hydrocarbonaceous material; a linear
copolymer having an A-B di-block or an A-B-A tri-block structure;
and an oil.
14. The hip and ridge shingle of claim 13, wherein said oil is
selected from petroleum-based oils, naphthenic oils, paraffinic
oils and combinations thereof.
15. The hip and ridge shingle of claim 13, further comprising a
member selected from one or more fillers, a radial copolymer and
combinations thereof, said radial copolymer being selected from a
block copolymer having an (A-B).sub.n radial structure where n is
an integer of at least 4 and a block copolymer having a tri-block
(A-B-A) radial structure having from 4-8 arms.
16. A hip and ridge shingle for mounting on a roof to cover a ridge
line or hip of said roof, comprising: a base layer having a first
length dimension and a first width dimension; a first decorative
layer having a second length dimension and a second width
dimension; a second decorative layer affixed to said first
decorative layer to provide areas of greater thickness on said base
member; and a flexible adhesive securing said first decorative
layer to said base layer and said first decorative layer to said
second decorative layer such that said first layer is operable to
move relative to both said base layer and said second decorative
layer to permit each of said base layer, said first decorative
layer and said second decorative layer to bend with a different
radius of curvature when said hip and ridge shingle is applied to
said roof over said ridge line or said hip.
17. The hip and ridge shingle of claim 16, wherein said flexible
adhesive permits said first and second decorative layers to move
relative to each other and said base layer said without cracking or
breaking said first or second decorative layer.
18. The hip and ridge shingle of claim 16, wherein at least one of
said second length and width dimensions is smaller than the
corresponding first length and width dimensions, said first
decorative layer being affixed to said base layer.
19. The hip and ridge shingle of claim 18, wherein each of said
base layer, said first decorative layer, and said second decorative
layer have opposing transverse edges, the corresponding said
transverse edges of said first decorative layer being offset
relative to said base layer and relative to said second decorative
layer when said hip and ridge shingle is installed on said ridge
line or said hip.
20. The hip and ridge shingle of claim 16, wherein said flexible
adhesive comprises: a hydrocarbonaceous material; a linear
copolymer having an A-B di-block or an A-B-A tri-block structure;
and an oil.
21. The hip and ridge shingle of claim 14, wherein said oil is
selected from petroleum-based oils, naphthenic oils, paraffinic
oils and combinations thereof.
22. The hip and ridge shingle of claim 15, further comprising a
member selected from one or more fillers, a radial copolymer and
combinations thereof, said radial copolymer being selected from a
block copolymer having an (A-B).sub.n radial structure where n is
an integer of at least 4 and a block copolymer having a tri-block
(A-B-A) radial structure having from 4-8 arms.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is related to and claims domestic priority
benefits from U.S. Provisional Patent Application Ser. No.
61/161,996 entitled "Low Temperature Shingle Sealant Composition"
filed Mar. 20, 2009 and U.S. Provisional Patent Application Ser.
No. 61/162,111 entitled "Low Temperature Shingle Sealant
Composition" filed Mar. 20, 2009, the entire contents of which are
expressly incorporated herein by reference in their entireties.
TECHNICAL FIELD AND INDUSTRIAL APPLICABILITY
[0002] The present invention relates generally to roofing shingles,
and more particularly, to a flexible laminating adhesive for use
with a multi-layered shingled product that permits the shingle
product to be bent, such as over an apex of a roof, without
cracking or breaking. In addition, flexible adhesive provides
flexibility at temperatures lower than or equal to about 40.degree.
F.
BACKGROUND
[0003] Roofs are typically formed so as to present at least two
non-parallel planes that meet at a peak, usually the uppermost
point of the roof. This peak is typically referred to as the ridge.
Roofs can also be formed to present other non-parallel planes that
are often formed at the ends of the ridge to form other
diagonally-extending plane intersections similar to the ridge, but
are referred to as hips. Whereas, the covering of the planar
portions of a roof typically involve the laying of shingles in
overlapping, transversely parallel courses from the bottom roof
edge to the ridge or hip, the ridges and hips require a different
technique to cover the intersection of the two or more roof planes.
A conventional technique for covering the ridges and hips is to cut
the shingles into appropriate width and to bend the cut shingle
over the ridge or hip so as to overlap the shingles placed on the
opposing roof planes, and then starting at one end of the ridge or
hip and overlap the cut shingles along the length of the ridge or
hip.
[0004] Asphalt composite shingles are one of the most commonly used
roofing products. These asphalt composite shingles typically
incorporate a base material made from a fiberglass mat, or other
suitable reinforcement member, such as an organic felt material.
This reinforcing base material serves as a matrix to support an
asphalt coating and gives the shingle strength. The asphalt coating
is formulated for the particular service application and has a
long-term ability to resist weathering and provide stability for
the structure under extreme temperature conditions. An outer layer
of granules is applied to the asphalt coating to form an outer
surface that the asphalt coating from direct sunlight. This outer
layer of granules also offers resistance to fire. Utilizing
differently colored granules provides a variety in the surface
appearance of the shingle to establish color variations.
[0005] Conventional laminated shingles, for example, as well as hip
and ridge shingles, are generally multilayered and the separate,
individual layers are held together with an adhesive material. One
problem associated with conventional adhesives is that the adhesive
can be too strong for a particular application. For instance, hip
and ridge shingles are often formed of multiple layers or chips
adhered to a base sheet in order to achieve a dimensional
appearance when attached to a roof. However, when placing these
multi-layered shingles along ridge or hip lines of a roof using
conventional adhesives, a problem may occur when bending the
shingle over the ridge or hip. In particular, because the thickest
areas of the shingle include two or three layers of material,
bending the shingle to cover the ridge or hip often results in a
crack along the outer layer of the dimensional composite shingle,
which compromises the integrity of the ridge or hip covering.
Furthermore, if the adhesive holding the various layers together is
too aggressive, the layers providing the dimensional appearance of
the shingle may tear apart or otherwise cause the shingle to
fail.
[0006] Thus, there exists a need in the art for an adhesive that
will permit a multilayer shingle product to bend over the ridge or
hip of a roof without failing, that does not pose any additional
health or safety issues, is cost effective, and where the
performance of the adhesive is sustainable over time
SUMMARY
[0007] In accordance with embodiments of the present invention, an
adhesive composition that includes a base asphalt, a linear
copolymer, and an oil is provided. In some exemplary embodiments,
the adhesive composition also contains a radial copolymer and/or
one or more fillers. The base asphalt used in the inventive
adhesive composition may be a viscosity graded asphalt, such as
AC-10 or AC-20, or a paving graded asphalt, such as PG58 or PG64.
The linear copolymer has an A-B di-block or A-B-A tri-block
structure where blocks A and B may individually represent (1)
styrene and butadiene or (2) styrene and isoprene. The oil is a
petroleum-based oil that both "softens" the asphalt in the
composition and reduces the viscosity of the adhesive composition.
In some exemplary embodiments, the adhesive composition also
contains a radial copolymer having an (A-B).sub.n radial structure,
where n is an integer of at least 4, or a tri-block (A-B-A) radial
structure having from 4-8 arms. The inventive adhesive composition
permits a multilayered shingle to have a degree of flexibility,
such as to permit the shingle to be bent over the ridge line or hip
of a roof.
[0008] In other embodiments to shingles for use as a hip and ridge
shingle that includes a base layer having a first length dimension
and a first width dimension and a first decorative layer having a
second length dimension and a second width dimension are provided.
The first decorative layer is affixed to the base layer by a
flexible adhesive that allows the first decorative layer to move
relative to the base layer without cracking or breaking the first
decorative layer. In the shingle, at least one of the second length
dimension and second width dimension is the same as or smaller than
the corresponding first length dimension and the first width
dimension. In exemplary embodiments, a second decorative layer is
affixed to the first decorative layer by the flexible adhesive.
Similar to the first layer, the adhesive permits the second
decorative layer to move relative to said first decorative layer
without cracking or breaking either the first or second decorative
layer. The second decorative layer may have a length and/or width
dimension that is the same as or smaller than the corresponding
length and width dimension of the first decorative layer. The
adhesive composition includes a base asphalt, a linear copolymer,
an oil, and optionally, a radial copolymer and/or one or more
fillers. Additionally, the adhesive possesses sufficient
flexibility and shear to permit a multilayered hip and ridge
shingle to be bent over the ridge or hip of a roof without cracking
or breaking, even at temperatures lower than or equal to about
40.degree. F.
[0009] In yet other embodiments, hip and ridge shingles for
covering a ridge line of a roof that includes (1) a base layer
having a first length dimension and a first width dimension and (2)
a first decorative layer having a second length dimension and a
second width dimension where at least one of the second length and
width dimensions is smaller than the corresponding first length and
width dimensions are provided. The first decorative layer is
affixed to the base layer by a flexible adhesive that allows a
limited movement of the first decorative layer relative to the base
layer to permit the first decorative layer to bend about a
different radius of curvature than the base member when the hip and
ridge shingle is bent over a ridge line. The hip and ridge shingle
may also include a second decorative member affixed to the first
decorative member by the flexible adhesive to allow a limited
movement of the second decorative layer relative to the first
decorative layer, thus allowing the second decorative layer to bend
at a different radius of curvature than the first decorative layer.
Additionally, each of the base layer, the first decorative layer,
and the second decorative layer have opposing transverse edges that
are offset when the hip and ridge shingle is installed on a ridge
line or a hip of a roof.
[0010] It is an advantage of the present inventions that the
adhesive composition is flexible such that the layers of a
multilayer shingle can be bent over the ridge or hip of a roof with
out breaking or cracking.
[0011] It is a further advantage of the present inventions that the
adhesive provides for more flexibility at lower temperatures, such
as temperatures lower than or equal to about 40.degree. F.
[0012] It is also an advantage of the present inventions that the
decorative layers of a laminated asphalt composite shingle are
secured by a flexible adhesive that permits the decorative layers
to shift transversely to allow the respective decorative layers to
bend at different radii of curvature when the shingle is placed
over a roof ridge or hip.
[0013] It is a further advantage of the present inventions that the
respective decorative layers of a laminated asphalt composite
shingle can bend at respective radii of curvature so that the
decorative layers will not crack along the bend line.
[0014] It is yet another advantage of the present inventions that
the adhesive composition does not pose any safety or health issues
to workers involved in their manufacture and/or application.
[0015] It is also an advantage of the present inventions that the
asphaltic adhesive is useful in winter applications and in colder
climates.
[0016] It is an advantage of the present inventions that the
individual layers of the shingle will bend at a radius of curvature
that accommodates the thickness of the shingle being bent to cover
the ridge or hip of a roof.
[0017] It is yet another advantage of the present inventions that
the exposed portion of the hip and ridge shingle is positioned on
the decorative layers of a previously laid hip and ridge single
when affixed to a ridge or hip of a roof, thereby providing a three
dimensional, aesthetically pleasing appearance.
[0018] It is a further advantage of the present inventions that the
slipping of the individual decorative layers of a laminated
composite shingle when bent to cover a ridge or hip of a roof
results in an exposure of the underlying layer along the
longitudinal length of the shingle.
[0019] The foregoing and other objects, features, and advantages of
the inventions will appear more fully hereinafter from a
consideration of the detailed description that follows.
BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The advantages of this invention will be apparent upon
consideration of the following detailed disclosure of the
invention, especially when taken in conjunction with the
accompanying drawings wherein:
[0021] FIG. 1 is a schematic top plan view of an embodiment of a
hip and ridge shingle formed according to the principles of the
instant invention, the shingle being shown in a flat orientation
with the decorative layers being representatively placed on a
central portion of the shingle;
[0022] FIG. 2 is a schematic end elevational view of the hip and
ridge shingle depicted in FIG. 1;
[0023] FIG. 3 is a schematic front elevational view of the hip and
ridge shingle depicted in FIG. 1; and
[0024] FIG. 4 is a schematic top plan view of an embodiment of a
hip and ridge shingle formed according to the principles of the
instant invention, the shingle being shown in a flat orientation
with the decorative layers being representatively placed on a
central portion of the shingle;
[0025] FIG. 5 is a schematic end elevational view of the hip and
ridge shingle depicted in FIG. 4;
[0026] FIG. 6 is a schematic top plan view of a base shingle
containing three separate hip and ridge shingles with perforations
therebetween to facilitate separation of the hip and ridge shingles
from the base shingle; and
[0027] FIG. 7 is a schematic front elevational view of the hip and
ridge shingle being bent to form a ridge or hip cover, the slippage
of the individual layers being seen along the sides of the bent
shingle.
DETAILED DESCRIPTION
[0028] Unless defined otherwise, all technical and scientific terms
used herein have the same meaning as commonly understood by one of
ordinary skill in the art to which the invention belongs. All
references cited herein, including published or corresponding U.S.
or foreign patent applications, issued U.S. or foreign patents, or
any other references, are each incorporated by reference in their
entireties, including all data, tables, figures, and text presented
in the cited references. The terms "adhesive", "inventive
adhesive", "adhesive composition", "laminating adhesive", and
"laminating adhesive composition" may interchangeably be used
herein. In addition, the terms "cap shingle", "cap", or "hip and
ridge shingle" may be used interchangeably herein.
[0029] The present inventions relate, at least in part, to a
flexible adhesive composition for use with hip and ridge shingles
(cap shingle) that includes a base asphalt, a linear copolymer, an
oil, and, optionally, a radial copolymer and/or one or more
fillers. The adhesive possesses sufficient flexibility and shear to
permit a multilayered hip and ridge shingle to be bent over the
ridge or hip of a roof without cracking or breaking. In addition,
the adhesive provides for more flexibility at lower temperatures,
such as temperatures lower than or equal to about 40.degree. F.
[0030] The laminating adhesive composition contains, as one
component, a base asphalt or other hydrocarbonaceous material. As
used herein, the term "asphalt" is meant to include any of a
variety of materials that are solid or semi-solid materials at room
temperature that gradually liquefy when heated and are formed
predominantly of naturally occurring bitumens obtained as residue
in petroleum refining. The base asphalt used in the inventive
adhesive composition is desirably a viscosity graded asphalt or an
AC-10 paving grade asphalt such as PG58-22, which is commercially
available British Petroleum and Conoco Philips and/or an AC-20
paving grade asphalt such as PG64-22, which is also commercially
available from British Petroleum and Conoco Philips. The base
asphalt may be generally present in the adhesive composition in an
amount from about 79.0% to about 90.5% by weight of the
composition. In exemplary embodiments, the base asphalt may be
present in the adhesive composition in an amount from about 81% to
about 88% by weight of the composition. As used herein, and unless
defined otherwise, the phrase "% by weight" is meant to denote % by
weight of the total adhesive composition.
[0031] As discussed above, the adhesive composition contains a
linear copolymer, and, optionally, a radial copolymer, each of
which is described in detail below. The copolymers are
thermoplastic and are selected for their ability to impart strength
to the adhesive at colder temperatures and to provide sufficient
flexibility and/or shear. As with conventional thermoplastic
organic polymers, the copolymers used in the inventive adhesive can
be processed (i.e., melted and extruded) and can be repeatedly
heated and cooled with no substantial loss in their properties,
including elastomeric properties. Accordingly, the copolymers used
herein substantially retain their properties when subjected to
heating and cooling cycles. One particular advantageous feature is
the ability of the copolymers to retain strength upon cooling the
copolymers, which gives both strength and flexibility to the
adhesive at colder temperatures.
[0032] The adhesive composition contains a linear copolymer having
an A-B di-block or A-B-A tri-block structure. In particular, the
linear copolymer has a di-block content greater than 50%. Blocks A
and B may individually represent (1) styrene and butadiene or (2)
styrene and isoprene. Either block, A or B, may include more than
one monomer. Additionally, each block segment may include 100 or
more monomer units. The linear copolymer may have a styrene content
of less than 50%, from about 20% to about 40% styrene, or from
about 20% to about 35% styrene. In some embodiments, the linear
copolymer has a styrene/butadiene ratio of 33/67. In some examples
the linear copolymer have styrene or polystyrene as the A block or
end block units. Suitable copolymers include styrene-butadiene
block copolymers and styrene-isoprene block copolymers. Specific,
non-limiting examples include D1118K, a styrene-butadiene-styrene
di-block copolymer, and D1113K, and D1119K,
styrene-isoprene-styrene linear polymers with a high-di-block
content (all are commercially available from Kraton.RTM.). In some
examples, the linear copolymer is a styrene-butadiene di-block
copolymer, such as D1118K, commercially available from Kraton.RTM..
The linear di-block copolymer may be present in the inventive
adhesive composition in an amount from about 2.5% to about 11.0% by
weight of the composition. In some embodiments, the linear
copolymer is present in the adhesive composition in an amount from
about 2.5% to about 6.5% by weight of the composition. In some
exemplary embodiments, the linear copolymer may be present in the
adhesive composition in a greater amount, such as, for example,
from about 10.0-14.0% by weight of the composition, or from
11.0-12.0% by weight.
[0033] Optionally, the adhesive composition may contain a radial
copolymer. The radial copolymer may have an (A-B).sub.n radial
structure, where n is an integer of at least 4, or from 4-20, or a
tri-block (A-B-A) radial structure having from 4-8 arms. Block
copolymers are well known and are described in numerous patents,
including, for example, U.S. Pat. No. 4,738,884 to Algrim, et al.,
U.S. Pat. No. 4,824,880 to Algrim, et al., and U.S. Pat. No.
6,759,454 to Stephens, et al., each of which is incorporated by
reference in their entirety. Similar to the linear copolymer, block
A and/or B in the radial copolymer may include more than one
monomer and each block segment may include 100 or more monomer
units. Additionally, blocks A and B may individually represent (1)
styrene and butadiene or (2) styrene and isoprene. It is desirable
that the radial polymer have styrene or polystyrene as the A block
or end block units. The radial copolymer may have a styrene content
of less than 50%, from about 20% to about 40% styrene, or from
about 20% to about 35% styrene. In some examples, the
styrene/butadiene ratio is 31/69.
[0034] Exemplary radial copolymers include D4158K (includes 33%
oil), D1184K, D1116K, and D1144K, all of which are
styrene-butadiene-styrene (SBS) radial copolymers (commercially
available from Kraton.RTM.), and D1124K and D1126P, both of which
are styrene-isoprene radial copolymers (commercially available from
Kraton.RTM.). In some embodiments, the radial copolymer is a
styrene-butadiene radial copolymer, such as D4158K or D1184K
(commercially available from Kraton.RTM.). The radial copolymer may
be present in the adhesive composition in an amount from 0% to
about 9.0% by weight of the composition. In exemplary embodiments,
the radial copolymer may be present in the adhesive composition in
an amount from about 3.5% to about 7.0% by weight of the
composition.
[0035] When both a linear and a radial copolymer are present in the
inventive adhesive, the total amount of the radial copolymer and
the linear copolymer present in the adhesive composition may range
from about 6.5% to about 14.0%, or from about 8.0% to about 11.0%
of the total composition. Additionally, the ratio of radial
copolymer to linear copolymer present in the adhesive composition
may range from 6:3 to 2:6 (radial copolymer:linear copolymer). In
some examples, the ratio of radial copolymer to linear copolymer
present in the adhesive composition is 5:4.
[0036] Another component present in the adhesive composition is an
oil. The oil can be any oil recognized in the art to enhance the
"softness" of the asphalt in the adhesive composition. The oil also
aids in reducing the viscosity of the adhesive composition. In
general, the oil is added in an amount necessary to achieve a
desired viscosity for the adhesive composition, and to improve
flexibility and low temperature bonding. The viscosity of the
adhesive composition desirably does not exceed approximately 1500
cps as measured by a Brookfield LVF Viscometer using spindle number
7 at 350.degree. F. The oil utilized in the adhesive composition
may be a petroleum-based oil or other naphthenic or paraffinic oils
identified by one of ordinary skill in the art. One particularly
useful oil is Hydrolene SP-125, a severely solvent modified heavy
petroleum oil commercially available from Sunoco, Inc. (CAS No.
63741-88-4). The oil, in combination with the selected copolymers,
acts to give the flexibility and shear so that the adhesive can be
used in conjunction with hip and ridge shingles, even at colder
temperatures. The oils and copolymer(s) permit the adhesive to flex
and/or shear so that the layers of the hip and ridge shingle
"slide" over each other upon bending and remain laminated together,
without cracking or breaking the dimensional elements adhering to
the base of the shingle. The oil may be present in the adhesive
composition in a total amount from about 2.0% to about 7.0% of the
total adhesive composition, or from about 4.0% to about 6.0%. It is
to be appreciated that a portion of the total oil content may be
derived from another component of the adhesive composition, such
as, for example, an oil-containing copolymer.
[0037] In some exemplary embodiments, fillers may be added to any
of the adhesive roofing sealant compositions. For example, up to
about 30% by weight of a filler may be used. Suitable fillers
include, but are not limited to, limestone (calcium carbonate),
dolomite (calcium magnesium carbonate), wollastonite, talc, silica,
and others known to those skilled in the art. The filler may have a
median particle size from about 5 microns to about 50 microns, or
from about 10 microns to about 30 microns.
[0038] One adhesive composition is set forth in Table 1.
TABLE-US-00001 TABLE 1 Components of Alternate % By Roofing Shingle
% By Weight of Weight of Adhesive Composition Composition
Composition PG64-22.sup.(1) 79.0-86.0 82.0-84.0 Kraton 1111.sup.(2)
10.0-14.0 11.0-12.0 Hydrolene SP-125.sup.(3) 4.0-7.0 5.0-6.0
.sup.(1)performance grade asphalt (commercially available from
British Petroleum and Conoco Philips)
.sup.(2)styrene-isoprene-styrene tri-block copolymer (commercially
available from Kraton .RTM.) .sup.(4)petroleum-based oil
(commercially available from Sunoco, Inc.)
[0039] A second adhesive composition is set forth in Table 2.
TABLE-US-00002 TABLE 2 Components of Alternate % By Roofing Shingle
% By Weight of Weight of Adhesive Composition Composition
Composition PG58-22.sup.(1) 79.5-88.5 81.0-86.0 Kraton 4158.sup.(2)
5.55-8.55 6.3-7.8 Kraton 1118.sup.(3) 4.6-7.6 5.6-7.6 Hydrolene
SP-125.sup.(4) 1.35-4.35 2.1-3.6 .sup.(1)performance grade asphalt
(commercially available from British Petroleum and Conoco Philips)
.sup.(2)styrene-butadiene radial copolymer containing oil
(commercially available from Kraton .RTM.)
.sup.(3)styrene-butadiene di-block copolymer (commercially
available from Kraton .RTM.) .sup.(4)petroleum-based oil
(commercially available from Sunoco, Inc.)
[0040] A third adhesive composition is set forth in Table 3. The
inventive adhesive compositions described herein can be reacted
with elemental sulfur to vulcanize in situ. Table 3 depicts an
exemplary composition containing a mixture of two linear copolymers
(i.e., di-block and tri-block styrene-butadiene copolymers). After
dispersion in the base asphalt and oil, the copolymer blend may be
crosslinked with sulfur. The addition of the sulfur to polymer
modified asphalts enhances dispersion stability and improves
mechanical properties.
TABLE-US-00003 TABLE 3 Components of Alternate % By Roofing Shingle
% By Weight of Weight of Adhesive Composition Composition
Composition PG64-22.sup.(1) 79.7-89.4 82.3-86.4 Kraton 1101.sup.(2)
4.0-8.0 6.0-7.0 Kraton 1118.sup.(3) 2.5-5.0 2.5-3.5 Hydrolene
SP-125.sup.(4) 4.0-7.0 5.0-6.0 Elemental sulfur 0.1-0.3 0.1-0.2
.sup.(1)performance grade asphalt (commercially available from
British Petroleum and Conoco Philips)
.sup.(2)styrene-butadiene-styrene linear tri-block copolymer
(commercially available from Kraton .RTM.)
.sup.(3)styrene-butadiene di-block copolymer (commercially
available from Kraton .RTM.) .sup.(4)petroleum-based oil
(commercially available from Sunoco, Inc.)
[0041] Conventional mixing or blending techniques may be used to
make the adhesive composition. In at least one exemplary
embodiment, the base asphalt is heated to a temperature of
approximately 350.degree. F. and the oil is blended into the molten
asphalt. The linear copolymer is added to the molten asphalt/oil to
form a mixture. If a radial copolymer is included in the
composition, it may be added along with the linear copolymer. The
mixture is then placed into a conventional milling apparatus where
the polymers are sheared into smaller polymeric pieces. The mixture
is ground in the milling apparatus for a period of time sufficient
to mill (grind) the polymers to a size that is no longer visible to
the naked eye under UV light. The adhesive composition is cooled
for packaging and then melted for application to a shingle. It may
be desirable to circulate and maintain the adhesive at an elevated
temperature during processing and application to the shingles to
aid in the prevention of phase separation.
[0042] Turning to FIGS. 1-3, a hip and ridge shingle according to
at least one exemplary embodiment of the invention can best be
seen. The laminated hip and ridge shingle 10 may include a base
layer 12. The base layer 12 may be formed in a conventional manner,
and in some embodiments includes a reinforcement member, such as a
fiberglass mat, on which asphalt and decorative granules are
placed. As one example, chopped glass fibers may be dispersed into
a water slurry which may contain surfactants, viscosity modifiers,
or other chemical agents. The slurry containing the dispersed
fibers is then deposited onto a moving screen where a substantial
portion of the water is removed. Next, a binder (e.g., a urea
formaldehyde binder or a polycarboxylic acid based binder) is
applied, and the resulting mat is dried to remove the remaining
water and cure the binder. The mat, formed of an assembly of
randomly oriented, dispersed individual glass filaments, may be
dried in any conventional manner, such as by passing the mat
through an oven. Asphalt may then be applied to the dried/cured mat
in any known manner, such as by passing the mat through a bath
containing an asphalt mix that may include molten asphalt, fillers,
and optionally sulfur, to place a layer of asphalt on at least one
side of the mat and fill in the interstices between the individual
glass fibers. The asphalt-coated mat is then cut to the appropriate
shape and size to form the base layer 12. The hot, asphalt-coated
mat may also be passed beneath one or more granule applicators that
apply protective surface granules to portions of the asphalt-coated
mat prior to cutting into the desired shape.
[0043] A similarly constructed first decorative or dimensional
layer 14 is positioned on and adhered to the base layer 12 to
provide a desired aesthetic appearance. Optionally, a second
decorative (dimensional) layer 16 may be affixed on the first
decorative layer 14 to provide greater depth to the composite
shingle 10 and an enhanced three dimensional aesthetic appearance,
particularly when viewed from a distance. It is to be appreciated
that although the drawings reflect two decorative layers 14, 16
that are positioned across the width of the base layer 12, one
skilled in the art will recognize that the decorative layers 14, 16
can be placed in any appropriate arrangement or orientation on the
base layer 12 to provide a desired aesthetic appearance.
Accordingly, the principles of the present invention are not
limited to the specific location, size of the layers, or
positioning of the decorative layers 14, 16, or the bending of the
shingle to form a ridge or hip cap, as described in greater detail
below, that requires the bending of all layers of the shingle
irrespective of the location of the decorative layers 14, 16.
[0044] The respective layers 12, 14, 16 of the hip and ridge
shingle 10 are adhered to one another via the flexible adhesive
described in detail above. To form the hip and ridge shingle 10,
the first decorative layer 14 is positioned at a desired location
on the base layer 12 and affixed thereto with the inventive
adhesive composition. The adhesive can be applied in a continuous
or discontinuous fashion, such as in the form of beads or "dashes".
In at least one embodiment (not illustrated), the first decorative
layer 14 may be the same size or substantially the same size as the
base layer 12. In other embodiments, the first decorative layer 14
may have a width that is smaller then the width of the base layer
12, such as is shown in FIGS. 1-3. In general, the first decorative
layer 14 has a length and a width dimension and at least one of the
length and width dimensions is smaller than the length and/or width
dimension of the base layer 12. Subsequent layers, such as, for
example, the second decorative layer 16, may have a length and/or a
width dimension that is the same as or smaller that of the first
decorative layer 14. For instance, the second decorative layer 16
may be affixed to the first decorative layer 14 such that the
second layer 16 substantially covers the first decorative layer 14.
As used herein, the phrase "substantially covers" is intended to
denote that the second layer 16 completely covers or nearly
completely covers the first decorative layer 14. In FIGS. 1-3, the
first and second decorative layers have approximately the same
length and width (i.e., are substantially the same size). Also, it
is to be appreciated that the addition of the first and/or second
decorative layer provides areas of greater thickness on the base
layer, which provides a dimension to the shingle and an aesthetic
appearance when viewed from a distance.
[0045] In an alternate embodiment, the second decorative layer 16
may have a length and/or a width dimension that is smaller than
that of the first decorative layer 14 to offset the second
decorative layer 14 from the first decorative layer 14 with only a
partial overlap of the second decorative layer 16 on the first
decorative layer. As shown in FIGS. 4 and 5, the first decorative
layer 14 is affixed to the base layer 12 with the adhesive
composition. The first decorative layer 14 has a size in a width
dimension that is less than a size in the width dimension of the
base layer 12. The second decorative layer 16, which has a size in
the width dimension that is less than the width dimensions of both
the first decorative layer 14 and the base layer 12, is affixed to
the top surface of the second decorative layer 14 to form a hip and
ridge shingle 10 in accordance with at least one embodiment of the
invention. It is to be appreciated that any number of
configurations of the arrangements of the first and second
decorative layers 14, 16 on the base layer 12 and the sizes of the
first and second decorative layers with respect to the base layer
12 are envisioned and are considered to be within the purview of
the invention.
[0046] The shingle may be advantageously formed in-line using
conventional roofing machines and existing roofing lines.
Initially, a base layer 12 is formed of a size large enough to
accommodate several individual hip and ridge shingles. Turning to
FIG. 6, a base shingle 40 formed of a base layer 12 including three
separate hip and ridge shingles 10 can be seen. To form a hip and
ridge shingle 10, a first decorative layer 14 and a second
decorative layer 16 may be affixed to the base layer 12 in-line
with the inventive adhesive being placed at each interface of the
layers 12, 14, and 16. Perforations 15 separating the three
separate shingles 10 may then be punched or otherwise formed into
the base layer 12. In some embodiments, the perforations 15 may be
punched prior to the application of the first and second decorative
layers. The perforations 15 permit a worker to easily detach one
hip and ridge shingle 10 from another at the jobsite without the
need for any additional equipment. Alternatively, the shingle 40
may not include perforations (not illustrated). If no perforations
are present, the worker must cut or otherwise similarly detach the
individual hip and ridge shingles 10 from the base shingle 40. The
distance between the perforations and the resulting final size of
the shingle 10 is dependent on the end use of the shingle 10, and
may include considerations such as the location where the shingle
10 will be used. For example, some regions of the United States use
a smaller hip and ridge shingle than other regions. Generally, the
perforations are about 12 inches or less from each other, thus
forming shingles with a width of approximately 12 inches (or less).
The length of the shingle 10 may also be about 12 inches or less,
and may or may not form a square shape.
[0047] FIG. 7 schematically illustrates the use of the hip and
ridge single 10. Although the placement of shingles on the opposing
planar portions 31, 33 of the roof 30 which are overlapped by the
hip and ridge shingle 10 have not been shown, one skilled in the
art will understand that before the hip and ridge shingle 10 is
folded over the ridge 35 of the roof 30, the ridge 35 (which could
also be a hip) being formed by the intersection of the two opposing
planar surfaces 31, 33 of the roof 30, the shingles on the planar
portions 31, 33 are affixed to the roof 30 up to the ridge 35. The
base shingle 40 starts in a flat orientation, such as is depicted
in FIG. 7, for the ease of shipping and because the ridges and hips
are formed at variable angles. For instance, one building may have
a roof slope of 6:12, while another may have a 4:12 slope, thus
resulting in the need for a ridge cap that can be mated to the
roof.
[0048] In use, the shingle 10 is detached from the base shingle 40
and is folded over the top of the ridge line 35 and secured in
place, typically by nailing or otherwise mechanically affixing the
hip and ridge shingle 10 to the roof. Subsequent shingle pieces 10
are then placed in an overlapping arrangement, similar to the
orientation of the courses of conventional shingles (e.g. three-tab
shingles) on the planar portions of the roof 30, beginning at one
end of the ridge 35 and continuing to the opposing or distal end of
the ridge 35. In particular, a first hip and ridge shingle may be
mechanically affixed to the roof, such as by nailing through the
first and second decorative layers and the base layer. A subsequent
hip and ridge shingle is then placed over the first shingle such
that the exposed portion of the second hip and ridge shingle is
positioned over the decorative layers of the first hip and ridge
shingle. This process is repeated with additional hip and ridge
shingles until the end of the ridge line or hip is reached. The
exposed portion of each subsequent shingle is thus raised, thereby
providing a three dimensional, aesthetically pleasing appearance to
the ridge line or hip.
[0049] It is to be appreciated that if the topmost decorative layer
16 were required to bend at the radius of curvature corresponding
to the base layer 12 in a conventional shingle, the cap 10 would be
likely to crack or break because of the thickness of the shingle 10
and because of the use of rigid adhesives. However, due to the
flexibility of the inventive adhesive, the respective layers can
move relative to the adjacent layer to accommodate the increasing
radius of curvature, as is reflected in the offset edges 27 along
the transverse sides of the cap 10. In the three-layer shingle 10
depicted in FIG. 7, the first decorative layer 14 is moved a
distance of S1 relative to the base member 12 and the second
decorative layer 16 is moved a distance S2 relative to the first
decorative layer 14. The adhesive permits the relative movement and
relaxes the stresses crated by folding the shingle 10 over the
ridge. An incidental benefit of this movement between the layers
12, 14, 16 is that the offset edges 27 along the transverse sides
of the cap 10 provide an additional three dimensional depth to the
cap 10.
[0050] The adhesive composition of the present invention provides
numerous advantages, such as, for example, flexibility at
temperatures lower than or equal to about 40.degree. F. In
addition, it is envisioned that the hip and ridge shingle using the
adhesive composition described herein can be manufactured in-line
with conventional roofing machines on existing roofing lines.
Incorporating the lamination of the decorative layers via the
inventive adhesive in-line provides significant savings and an
economic advantage. Further, the adhesive composition has little or
no toxicity or safety issues, and, as a result, no additional
safety precautions or equipment are needed to apply the adhesive to
the layers forming the hip and ridge shingle.
[0051] The invention of this application has been described above
both generically and with regard to specific embodiments.
Therefore, it is to be understood that a wide variety of
alternatives known to those of skill in the art can be selected
within the generic disclosure. The invention is not otherwise
limited, except for the recitation of the claims set forth
below.
* * * * *