U.S. patent application number 14/648297 was filed with the patent office on 2015-10-29 for epoxy-based substance for fixing purposes, the use thereof and the use of specific components.
The applicant listed for this patent is fisherwerke GmbH & Co. KG. Invention is credited to Jurgen GRUN, Christian SCHLENK, Martin VOGEL, Christian WEINELT.
Application Number | 20150307702 14/648297 |
Document ID | / |
Family ID | 49886861 |
Filed Date | 2015-10-29 |
United States Patent
Application |
20150307702 |
Kind Code |
A1 |
GRUN; Jurgen ; et
al. |
October 29, 2015 |
EPOXY-BASED SUBSTANCE FOR FIXING PURPOSES, THE USE THEREOF AND THE
USE OF SPECIFIC COMPONENTS
Abstract
Compositions for a curable substance for fixing purposes,
comprising an epoxy component (a), which contains curable epoxides,
and a hardener component (b), which comprises a Mannich base
formulation, obtainable by reaction of specific amines, and/or
mixtures of styrenated phenols with low molecular weight amines, to
novel Mannich base formulations or mixtures of styrenated phenols
with low molecular weight amines, and to the use of such Mannich
base formulations and/or of such mixtures of styrenated phenols
with low molecular weight amines, and in each case especially
further additional ingredients, especially in hardener components
for epoxy resins.
Inventors: |
GRUN; Jurgen; (Boetzingen,
DE) ; VOGEL; Martin; (Glottertal, DE) ;
SCHLENK; Christian; (Denzlingen, DE) ; WEINELT;
Christian; (Emmendingen, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
fisherwerke GmbH & Co. KG |
Waldachtal |
|
DE |
|
|
Family ID: |
49886861 |
Appl. No.: |
14/648297 |
Filed: |
December 4, 2013 |
PCT Filed: |
December 4, 2013 |
PCT NO: |
PCT/EP2013/003655 |
371 Date: |
May 29, 2015 |
Current U.S.
Class: |
523/400 |
Current CPC
Class: |
C08G 59/245 20130101;
C08G 59/56 20130101; C08G 59/623 20130101; C04B 24/281 20130101;
C08G 59/02 20130101; C08L 2205/06 20130101; C08L 63/00 20130101;
C08J 5/04 20130101; C08J 2363/00 20130101; C08G 59/621
20130101 |
International
Class: |
C08L 63/00 20060101
C08L063/00; C08G 59/02 20060101 C08G059/02 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 11, 2012 |
DE |
10 2012 112 053.6 |
Claims
1. A composition for a curable substance for fixing purposes,
comprising an epoxy component (a), which contains curable epoxides,
and a hardener component (b), which comprises (i) a Mannich base
formulation obtainable by reaction of one or more specific amines
with phenols and aldehydes, the specific amines being those of the
formula ##STR00006## wherein "CYC" is a monocyclic saturated ring
having from 3 to 12 ring atoms or a condensed dicyclic saturated
ring system having from 6 to 12 ring atoms, wherein in each case
the ring atoms are selected from 0 to 2 nitrogen atoms, 0 to 1
oxygen atoms and 0 to 1 sulfur atoms and from carbon atoms; X is
CH.sub.2, wherein for each group --[X].sub.n--NH.sub.2 one X can be
NH, O or S, with the proviso that in the case of an X.dbd.O or S,
in the group --[X].sub.n--NH.sub.2 in question n is at least 2 and
the O or S is not bonded directly to a nitrogen atom and in the
case of one X.dbd.NH, n is at least 2 and the X.dbd.NH is bonded
neither directly to a nitrogen ring atom nor to a nitrogen atom
present in the group --[X].sub.n--NH.sub.2 in question; n is from 0
to 5, with the proviso that at least in one of the groups
--[X].sub.n--NH.sub.2 n is from 1 to 5; and m is a whole positive
number greater than or equal to 2, especially 2 to 3; or salts
thereof, and/or (ii) mixtures of styrenated phenols with one or
more low molecular weight amines, which are di- or poly-amines, or
salts thereof.
2. The composition according to claim 1, wherein, in the case of
(ii), the low molecular weight amine(s) are those of the formula
shown under (i) in claim 1.
3. The composition according to claim 1, wherein, in the case of
(ii), the low molecular weight amine(s) are xylylenediamines,
aliphatic polyamines, oligomeric diamines of the formula
H.sub.2N--(CH.sub.2).sub.i--NH--[(CH.sub.2).sub.j--NH].sub.k--(CH.sub.2).-
sub.l--NH.sub.2, wherein i, j and l are each independently of the
others from 2 to 4 and k is 0, 1 or 2; cycloaliphatic amines; or
amine adducts; or mixtures of two or more thereof.
4. The composition according to claim 1, wherein, in the case of
(ii), the low molecular weight amine(s) are selected from
m-xylylenediamine, 1,3-bis(aminomethyl)cyclohexane (BAC),
triethylenetetraamine and isophoronediamine, or mixtures of two or
more thereof, especially from BAC and m-xylylenediamine or mixtures
thereof.
5. The composition according to claim 1, wherein, in the case of
(i), the specific amines(s) are selected from
1,3-bis(aminomethyl)cyclohexane (BAC), 4-(2-aminoethyl)piperazine,
N,N'-bis(3-amino-n-propyl)piperazine, and mixtures of two or more
thereof, with special preference being given to BAC.
6. The composition according to claim 1 as a substance for drilled
holes.
7. The composition according to claim 1, wherein, in the case of
(i), for the Mannich base preparation there are used as phenols
styrenated phenol or phenol and as aldehydes formaldehyde or a
precursor thereof.
8. The composition according to claim 7, wherein the content of
free phenol is less than 1% by weight.
9. The composition according to claim 1 in the form of a
multi-component kit, especially a two-component kit, wherein at
least an epoxy component (a) and a hardener component (b) are
housed in different compartments of a container or in a plurality
of containers in a common packaging.
10. A multi-component kit, especially a two-component kit,
according to claim 9, wherein the ratio by weight of components (a)
to (b) is 10 to 1 or less, especially 5 to 1 or less, preferably 3
to 1 or less, the lower limit advantageously being 1 to 1 in each
case.
11. The composition according to claim 1, wherein, in the case of
(i), the proportion of Mannich base, based on the total weight of
the component (b) introduced, has a proportion of from 10 to 100%
by weight, preferably from 30 to 75% by weight.
12. The composition according to claim 1, wherein, in the case of
(ii), the proportion of the mixture of styrenated phenols and low
molecular weight amines, based on the total weight of the component
(b) introduced, has a proportion of from 10 to 100% by weight,
preferably from 30 to 75% by weight.
13. Use of a composition according to claim 1, especially in the
form of a two-component kit, for the fixing of anchoring elements,
wherein the components thereof are mixed and introduced into
surface hollows, especially drilled holes, in a substrate and the
anchoring elements are introduced simultaneously or
subsequently.
14. Use of a composition according to claim 1, especially in the
form of a two-component kit, for the fixing of fibres, non-crimp
fabrics, woven fabrics or composites for reinforcement of
buildings.
15. Use of a Mannich base as described in claim 1 in the production
of a composition, especially the hardener component of a
multi-component kit containing the components of such a
composition, for the fixing of anchoring elements in drilled
holes.
16. Use of a mixture of one or more styrenated phenols with one or
more low molecular weight amines, as described in claim 1, in the
production of a composition, especially the hardener component of a
multi-component kit containing the components of such a
composition, for the fixing of anchoring elements in drilled holes.
Description
TECHNICAL FIELD OF INVENTION
[0001] The invention relates to compositions for a curable
substance for fixing purposes, comprising an epoxy component (a),
which contains curable epoxides, and a hardener component (b),
which comprises a Mannich base formulation, obtainable by reaction
of specific amines, and/or mixtures of styrenated phenols with low
molecular weight amines; to novel Mannich base formulations or
mixtures of styrenated phenols with low molecular weight amines,
and to the use of such Mannich base formulations and/or of such
mixtures of styrenated phenols with low molecular weight amines,
and in each case especially further additional ingredients,
especially in hardener components for epoxy resins.
DISCUSSION OF RELATED ART
[0002] Hardenable multi-component (such as two-component)
epoxy-based substances are known in principle. For example, they
can be used in the production of lacquers, in the production of
coatings and as moulding compounds and the like.
[0003] Synthetic mortar substances based on epoxy resins and amine
hardeners are also known in the fixings sector, for example for the
fixing of anchoring means, such as anchor rods.
[0004] Statutory regulations mean that an increasingly small number
of amines can be used without major restrictions for the
formulation of hardeners for epoxy resins in the fixings field,
especially in the building sector. The remaining amines often
provide only very little scope or poor scope for establishing
desirable properties (high bond stress, high pull-out values, rapid
curing, high thermal strength, curing even at low temperature,
water-resistance for use in a wet substrate (for example wet
concrete), chemical stability and so forth) that should be
achievable in the finished products.
[0005] In particular, the achievement of high bond stresses, and
also the improvement of one or more of the other properties
mentioned, by the provision of new components and, in particular,
new amine components as hardeners, therefore remain objectives to
be pursued.
SUMMARY OF THE INVENTION
[0006] The problem of the present invention is therefore to provide
new epoxy resins for fixing purposes, especially in the building
sector, which make it possible to achieve properties that are
advantageous in comparison with the epoxy resins known hitherto,
especially one or more of the properties improved, as above, in
comparison with known substances, and more especially high pull-out
values and high bond stresses, in particular also at elevated
temperatures.
[0007] Surprisingly, it has now been found that this problem can be
solved by the use of special Mannich base formulations as amine
hardeners, it being possible for such Mannich base formulations to
be produced using very specific amines; and/or by the use of
mixtures of styrenated phenols with low molecular weight
amines.
[0008] The "specific amines" to be used according to the invention
are especially cycloaliphatic or heterocycloaliphatic di- or
poly-amines, in which at least one amino group, but better all
amino groups, is/are not bonded directly to the cycloaliphatic or
heterocycloaliphatic nucleus but bonded thereto via a linker with a
spacing one or more atoms (carbon and/or hetero atoms).
[0009] Without wishing to be bound to this explanation, it appears
that the additional degrees of freedom of movement resulting from
the short-chain/not excessively long-chain linker molecule
portions, which could give rise to better reactivity, in
combination with the cyclic constituents of the amine molecules,
which contribute a stable, more or less rigid structure, contribute
to the advantages observed, such as, especially, good bond
stresses.
[0010] The "specific amines" to be used according to the invention
are in particular those of the formula
##STR00001##
wherein "CYC" is a monocyclic saturated ring having from 3 to 12
ring atoms or a condensed di- or (further) poly-cyclic saturated
ring system having from 6 to 12 ring atoms, wherein in each case
the ring atoms are selected from 0 to 3 nitrogen atoms, 0 to 3
oxygen atoms and 0 to 1 sulfur atoms and from carbon atoms; X is
CH.sub.2, wherein for each group --[X].sub.n--NH.sub.2 one X can be
NH, O or S, with the proviso that in the case of X.dbd.O or S, n is
at least 2 and the O or S is not bonded directly to a nitrogen atom
present in the group --[X].sub.n--NH.sub.2 and in the case of one
X.dbd.NH, n is at least 2 and the X.dbd.NH is bonded neither
directly to a nitrogen ring atom nor to a nitrogen atom present in
the group --[X].sub.n--NH.sub.2 in question; n is from 0 to 5, with
the proviso that at least in one of the groups
--[X].sub.n--NH.sub.2 n is from 1 to 5; wherein generally n=1 to 3,
especially n=1, is preferred; and m is a whole positive number
greater than or equal to 2, especially 2 to 3; or salts
thereof.
[0011] The constituent [X].sub.n is one of the mentioned
linkers.
[0012] Preferred compounds of this type are
N,N'-bis(3-amino-n-propyl)piperazine (BAPP),
1,3-bis(aminomethyl)cyclohexane (BAC) or, further,
N-(2-aminoethyl)piperazine (AEP) or
3-aminomethyl-3,5,5-trimethylcyclohexylamine
(isophoronediamine=IPDA).
[0013] Special preference is given to
1,3-bis(aminomethyl)cyclohexane (BAC) of the formula
##STR00002##
[0014] In comparison with Mannich base formulations from the prior
art used hitherto, which do not fall under this definition because
they differ in at least one, especially two and more especially all
of the mentioned parameters, the multi-component mortars which can
be produced according to the invention exhibit significantly higher
bond stress after curing, even at relatively high temperatures,
such as at 80.degree. C., so that they are still usable even at
such a temperature. Furthermore, even on being cured at -5.degree.
C. they generally exhibit better, or at least equally good, bond
stresses in comparison with mortars produced using Mannich base
formulations from the prior art employed hitherto.
[0015] The Mannich bases to be used according to the invention are
the reaction products of phenols, such as phenol, pyrocatechol,
resorcinol, hydroquinone, hydroxyhydroquinone, phloroglucinol,
pyrogallol, o-cresol, m-cresol, p-cresol, or bisphenols, such as
bisphenol F or bisphenol A, especially phenol, or of styrenated
phenols, as defined hereinbelow, with the "specific amines" defined
hereinabove and aldehydes, or compounds yielding aldehydes by
decomposition, especially aliphatic aldehydes, such as, in
particular, formaldehyde (which term can also include compounds
yielding formaldehyde by decomposition, such as trioxane or
paraformaldehyde), the aldehydes advantageously being added and
reacted in the form of an aqueous solution (especially at elevated
temperature, such as at from 50 to 90.degree. C.).
[0016] According to the invention, the preparation of the Mannich
bases can be effected in accordance with methods known per se,
using the above-defined "specific amines".
[0017] For example, they can be carried out as follows, for example
using the amines mentioned in the Examples (the specific details
(characterised by "e.g." and "for example") refer to the Mannich
bases used in the Examples):
[0018] Amine (e.g. 2 mol) is introduced as initial charge (for
example in a 250 ml three-necked flask equipped with a thermometer,
a dropping funnel and a stirring device). With stirring, phenol or
styrenated phenol (e.g. 1 mol) is added to the amine initially
introduced. Heating is carried out (e.g. at 80.degree. C.). When
the temperature has been reached (e.g. within a period of 45 min)
formaldehyde is added dropwise (e.g. 0.7 mol in the form of 37%
formaldehyde solution), especially with vigorous stirring. When
addition is complete, further heating is carried out (for example
at 105.degree. C.) and the reaction conditions are maintained for a
period of time (e.g. 120 min). Water is then distilled off--for
example under an increasing vacuum--at a suitable temperature (e.g.
about 110.degree. C.); as soon as the pressure has fallen
sufficiently (e.g. to 50 mbar), the temperature is increased again
(e.g. to 130.degree. C.) and then maintained for a period of time
(e.g. 60 min). The resulting product is the Mannich base
formulation which can contain further additional ingredients
selected from benzyl alcohol, further (styrenated) phenol, further
amine for dilution. Such additional constituents of the Mannich
base total formulation can be up to a maximum of 15% by weight
benzyl alcohol, up to a maximum of 30% by weight free phenol
component (e.g. also styrenated phenol) and up to a maximum of 75%
by weight free amine, based on the mass of the Mannich base
formulation.
[0019] The "low molecular weight amines" to be used in the mixture
with styrenated phenols (which amines can be present as such or in
salt form) are the above-mentioned "specific amines", especially
those mentioned as being preferred, or other low molecular weight
polyamines ("polyamines" also including diamines), especially
oligomeric or monomeric aliphatic, cycloaliphatic,
cycloheteroaliphatic, aromatic or araliphatic diamines, such as
especially xylylenediamines, more especially m-xylylenediamine
(1,3-bis(aminomethyl)benzene, MXDA); aliphatic polyamines, for
example C.sub.1-C.sub.10alkane-di- or -poly-amines, e.g.
1,2-diaminoethane, trimethylhexane-1,6-diamine, diethylenetriamine
or triethylenetetraamine; oligomeric diamines of the formula
H.sub.2N--(CH.sub.2).sub.i--NH--[(CH.sub.2).sub.j--NH].sub.k--(CH.sub.2).-
sub.l--NH.sub.2, wherein i, j and l are each independently of the
others from 2 to 4 and k is 0, 1 or 2, especially
"triethylenetetramine" (TETA=N,N'-bis(2-aminoethyl)ethylenediamine)
or tetraethylenepentamine (TEPA); cycloaliphatic amines, such as
1,2-diaminocyclohexane or bis(aminomethyl)tricyclodecane (TCD) or
bis(4-aminocyclohexyl)methane (PACM), or amine adducts; or mixtures
of two or more thereof; especially mixtures of one or more
araliphatic diamines, more especially m-xylylenediamine, with one
or more other polyamines, especially BAC, or more especially one or
more araliphatic diamines, especially m-xylylenediamine itself, or
mixtures of BAC and m-xylylenediamine.
[0020] Surprisingly, it has been found that instead of using
Mannich base formulations the preparation of which involves the
reaction of phenols and the "specific amines", it is possible to
use simply mixtures of (i) styrenated phenols with (ii) the "low
molecular weight amines". Here too, the mentioned advantages are
achieved. It is also possible for the preparation of the mentioned
mixtures, by mixing components (i) and (ii) or mixtures containing
them with further additional ingredients, not to take place until
at the site of use. Furthermore, a further advantage over mixtures
with Mannich bases is that a relatively low viscosity can be
achieved without taking further measures.
[0021] Styrenated phenols are to be understood as being the
reaction products (electrophilic substitution products) of phenols
(such as phenol, pyrocatechol, resorcinol, hydroquinone,
hydroxyhydroquinone, phloroglucinol, pyrogallol, o-cresol, m-cresol
or p-cresol, especially phenol) with styrene or styrene analogues,
such as vinyltoluene, divinylbenzene or 4-vinylpyridine, especially
with styrene, especially "styrenated phenol" itself (reaction
product of styrene and phenol; CAS Reg. No. 61788-44-1), which, by
way of example, can contain mixtures of compounds or individual
compounds of the following formulae:
##STR00003##
or 2,6-distyryl phenol, and also oligo- and poly-styrene portions
or compounds (oligomeric or polymeric products obtained from
cationic polymerisation of styrenes in phenols), for example of the
formula
##STR00004##
wherein a is 1 or a larger whole number, or branching products--in
general, mixtures of a plurality of products formed during the
reaction (including poly-substituted products) are obtained, so
that the mentioned formulae are at most to be understood as being
exemplary and are not necessarily--at least not in all
cases--obtained as such.
[0022] Parameters, insofar as they are described in the context of
the present application, are determined as follows in accordance
with methods known to the person skilled in the art:
[0023] For the production of test specimens for compression and
tension tests, the epoxy resin component (example of a component
(a) to be used according to the invention) is mixed with the
corresponding Mannich base or mixture of styrenated phenol and low
molecular weight amine (example of a component (b) to be used
according to the invention) in stoichiometric amounts (the mixture
stoichiometry is determined by the epoxy equivalent values and the
H equivalents by calculation (e.g. from manufacturer's data)) and
cured for 24 h at room temperature (about 23.degree. C.). The epoxy
resin component in the Examples is a mixture of 40% by weight
bisphenol A/F diglycidyl ether, 15% by weight trimethylolpropane
triglycidyl ether and 45% by weight Portland cement. Further
additional ingredients are possible.
[0024] To determine the compressive strength (in accordance with
DIN EN ISO 604), a cylindrical test specimen is produced. The test
specimen has the following dimensions: diameter 12 mm, length 40
mm. When curing is complete, the test specimen is axially
compressed parallel to its main axis at a constant rate of 1 mm/min
until it breaks or until the stress or decrease in length has
reached a pre-set value. During the operation the force absorbed by
the test specimen is measured. The compressive strength is the
maximum compressive stress borne by a test specimen during a
compression test.
[0025] To determine the tensile properties (tensile strength--in
accordance with DIN EN ISO 527), a dumbbell test specimen in
accordance with DIN EN ISO 527-2 Type 1BA is produced. For testing,
the test specimen is clamped in a jig and stretched along its main
axis at a constant rate of 5 mm/min until it breaks. During this
operation, the load borne by the test specimen and the change in
length are measured. The tensile strength is the maximum stress
borne by the test specimen during a tensile test.
[0026] For pull-out tests using threaded rods M12 the following
procedure, in accordance with ETAG 001 PART 5, is carried out:
[0027] First of all, a hammer drill and a hammer drill bit are used
to drill holes (diameter 14 mm; depth 72 mm) in a concrete test
specimen (concrete type C20/25) lying in a horizontal position. The
drilled holes are cleaned using a hand blower and a hand brush.
Starting from the base, the drilled holes are then filled
two-thirds full with the particular curable substance for fixing
purposes to be tested (Mannich base and/or mixture of styrenated
phenols with the specific amines, in the form of an epoxy resin
component a mixture of 40% by weight bisphenol A/F diglycidyl
ether, 15% by weight trimethylolpropane triglycidyl ether and 45%
by weight Portland cement). A threaded rod is pushed into each
drilled hole by hand. The excess mortar is removed using a trowel.
After 24 hours (minimum curing time) at room temperature, the
threaded rod is subject to pulling until it fails, the failure load
being measured.
[0028] The measurement of the viscosities is carried out with a
Brookfield rotational viscometer using spindle 3 at 23.degree. C.
at from 10 to 50 rev/min, preferably 10 rev/min.
[0029] The measurement of the glass transition temperature (an
indirect measure inter alia of the thermal dimensional stability)
is effected by means of dynamic differential calorimetry (DSC) in
accordance with ISO 11357-2 on samples cured for 24 h.
[0030] The glass transition temperature or glass transformation
temperature (the temperature above which the solid, glassy material
changes into a softer, rubber-like material), which is a measure of
the usability of the cured mortars at high temperatures, is
increased according to the invention and accordingly their scope
for use, even at high temperatures, can be further enhanced.
[0031] The permissible temperature range for the cured product can
likewise be determined by pull-out tests after treatment with
different temperatures (for example 24 h curing at room
temperature, at 50.degree. C. and/or at 80.degree. C.).
[0032] Instead of the term "curable substance" the term "mortar" is
also used in some instances hereinbelow.
[0033] The mixtures according to the invention can be used in the
form of single-component systems or preferably in the form of
multi-component systems (with separation especially of component
(b), which contains hardener=Mannich base or mixture of styrenated
phenol with low molecular weight amine to be used according to the
invention, from component (a), which contains epoxy compound(s),
e.g. in different compartments of a container or in a plurality of
containers in a common packaging, so that they are unable to react
with one another prior to use for fixing purposes), for example in
the form of a multi-component kit.
[0034] A multi-component kit (or set) is to be understood as being
especially a two-component kit (preferably a two-component kit
containing components (a) and (b)), preferably a two-chamber or,
further, multi-chamber device, in which the components (a) and (b)
that are capable of reacting with one another are contained in such
a way that they are unable to react with one another during
storage, the components preferably being contained in such a way
that they do not come into contact with one another prior to use.
Capsules are a possibility. Especially suitable, however, are
cartridges or foil sachets having two or more chambers, or
containers, such as buckets or tubs, having a plurality of
chambers, or sets (e.g. bundles) of two or more such containers,
wherein two or more components of the curable substance in
question, especially two components (a) and (b) as defined above
and below, are physically separated from one another, in the form
of a kit or set in which the contents, after being mixed together
or while being mixed together, are applied to the site of use
(especially by means of application tools such as trowels or
brushes or a static mixer), for example are applied to a surface
for the fixing of fibres, non-crimp fabrics, woven fabrics,
composites or the like, or introduced into a cavity, such as a
drilled hole, especially for the fixing of anchoring means, such as
anchor rods or the like; and also multi-component or, especially,
two-component cartridges, the chambers of which contain the
plurality of components or, preferably, two components (especially
(a) and (b)) for a curable substance for fixing purposes having the
compositions mentioned hereinabove and hereinbelow, for storage
prior to use, such a kit preferably also including a static mixer.
In the case of foil sachets and multi-component cartridges, the
multi-component kit can also include a discharge device, but this
can preferably also be separate from the kit (for example for
multiple use).
[0035] Unless otherwise indicated, hereinabove and hereinbelow
proportions or contents given in percent relate to percent by
weight in each case.
[0036] For example, a single-component or multi-component kit,
especially a two-component kit, as described hereinabove and
especially hereinbelow, is a possible embodiment preferred for use,
wherein, based on the total weight of the mortar component (b)
introduced, the Mannich base formulation has a proportion of from
10 to 100% by weight, preferably from 30 to 75% by weight.
[0037] A single-component or multi-component kit, especially a
two-component kit, in which the mixture of styrenated phenols and
low molecular weight amines, based on the total weight of the
mortar component (b) introduced, has a proportion of from 10 to
100% by weight, preferably from 30 to 75% by weight, is likewise a
preferred embodiment, as is also the use thereof.
[0038] Special preference is also given to a multi-component kit as
described hereinabove and hereinbelow and especially to the use
thereof according to the invention, characterised in that the
Mannich base formulation or the mixture of styrenated phenols and
low molecular weight amines has H equivalents in the range of from
30 to 105 and a viscosity in the range of from 50 to 10,000 mPas,
and preferably a content of free phenol of 20% by weight or less,
for example of less than 1% by weight, e.g. of 0.1% by weight or
less, based on the Mannich base formulation or the mixture of
styrenated phenols and low molecular weight amines.
[0039] The determination of the H equivalents (amount of resin that
contains 1 mol of reactive H) is effected in a manner known to the
person skilled in the art, with reference to the formulation of the
reaction mixture, from the known H equivalents of the starting
materials and raw materials used, from which they are
calculated.
[0040] For a simple amine, the calculation of the H equivalent will
be explained, purely by way of example, using the example of
meta-xylylenediamine:
General Formula:
[0041] H eq . = Mw functionality ##EQU00001##
##STR00005##
applie d: H eq . = 136 4 [ g eq ] = 34 [ g eq ] ##EQU00002##
[0042] The epoxy equivalent values are generally indicated on the
starting materials by the manufacturers or they are determined or
calculated in accordance with known methods. They indicate the
amount in g of resin that contains 1 mol of epoxy groups.
[0043] In a multi-component kit, especially a two-component kit,
according to the invention or for use according to the invention,
as described hereinabove and hereinbelow, in an advantageous
embodiment of the invention the ratio by volume of components (a)
to (b) is 10 to "1 or less", especially 5 to "1 or less",
preferably 3 to "1 or less", the lower limit advantageously being 1
in each case.
[0044] Curable epoxy resins (present in component (a) in the case
of multi-component systems) are preferably polyglycidyl ethers of
at least one polyvalent alcohol or phenol, such as novolak, or
especially bisphenol F or bisphenol A, or mixtures of two or more
of those compounds, or other aromatic or heteroaromatic glycidyl
ethers having an epoxy functionality of at least 2 or especially
tri- or higher glycidyl ethers, or likewise mixtures of two or more
of all the mentioned alternatives. The epoxy resins have, for
example, an epoxy equivalent of from 100 to 2000, preferably from
120 to 400. The proportion in the epoxy component (a) is >0 to
100%, preferably from 10 to 60%.
[0045] In addition to the constituents mentioned hitherto, the
mortars according to the invention or for use according to the
invention (especially multi-component kits), as mentioned
hereinabove and hereinbelow, may contain further customary
additional ingredients in one or more of their components
(especially component (a), (b) or (a) and (b)) (the person skilled
in the art will know to what extent such constituents should not
come into contact with the components of a multi-component kit
according to the invention or in accordance with the invention,
such as especially a two-component kit with the components (a) and
(b), prior to mixing for use).
[0046] As reactive diluents (which should not be present in a
hardener component, that is to say are preferably contained (in the
case of a two-component system solely) in component (a)) there can
be used glycidyl ethers of aliphatic, cycloaliphatic, araliphatic
or aromatic mono- or especially poly-alcohols, such as monoglycidyl
ethers, e.g. o-cresyl glycidyl ether, and/or especially glycidyl
ethers having an epoxy functionality of at least 2, such as
1,4-butanediol diglycidyl ether, cyclohexanedimethanol diglycidyl
ether, hexanediol diglycidyl ether and/or especially tri- or higher
glycidyl ethers, e.g. glycerol triglycidyl ether, pentaerythritol
tetraglycidyl ether or trimethylolpropane triglycidyl ether, or,
further, mixtures of two or more of those reactive diluents.
Special preference is also given to glycidyl silanes, e.g.
according to WO 2011/113533. The reactive diluents are preferably
present in amounts of from 0 to 60% by weight, especially from 1 to
30% by weight, based on the total weight of the epoxy component
(a).
[0047] Fillers can be present in one or more components, for
example of a multi-component kit according to the invention, for
example in one or both components of a corresponding two-component
kit; the proportion of fillers is preferably from 0 to 90% by
weight, for example from 10 to 90% by weight.
[0048] As fillers there are used customary fillers, such as
hydraulically curable fillers, such as gypsum, quicklime, water
glass or active aluminium hydroxides, or especially cements, such
as Portland cement or high-alumina cements, chalks, quartz powder,
corundum or the like, which can be added in the form of powder, in
granular form or in the form of shaped bodies, or other fillers,
such as mentioned, for example, in WO 02/079341 and WO 02/079293
(which in this regard are incorporated herein by reference), or
mixtures thereof; it being further or especially possible for the
fillers also to be silanised, for example in the form of amino- or
epoxy-silane-treated quartz powder, such as Silbond AST or EST.RTM.
from Quarzwerke GmbH, in the form of amino- or
glycidyl-silane-treated silica, such as Aktisil AM or EM.RTM. from
Hoffmann Mineral, or amino- or glycidyl-silane-treated pyrogenic
silicic acids. The fillers can be present in one or more components
of a multi-component kit according to the invention, for example in
one or both components (a) and (b) of a corresponding two-component
kit; the proportion, based on the total weight of the curable
substance, is preferably from 0 to 70% by weight, preferably from 5
to 60% by weight.
[0049] As further additional ingredients for individual components
or for a plurality of components of the compositions according to
the invention or for use according to the invention there can be
present plasticisers, non-reactive diluents or flexibilisers,
stabilisers, catalysts, such as e.g. curing catalysts (for example
salicylic acid), rheology auxiliaries, thixotropic agents, agents
for controlling the reaction rate, e.g. accelerators, wetting
agents, colouring additives, such as dyes or especially pigments,
for example for staining the components different colours for
better monitoring of the intermixing thereof, or additives, or the
like, or mixtures of two or more thereof. Such further additional
ingredients can preferably be present, in total, in proportions by
weight of in total from 0 to 30%, for example from 0 to 5%, based
on the total curable substance. They can be present in individual
components or in a plurality of components, e.g. (a) and/or (b), or
in the Mannich base formulation (which is accordingly to be
referred to as an "extended Mannich base formulation") or can have
been added to the mixtures of styrenated phenols with low molecular
weight amines themselves.
[0050] In a special embodiment, the invention relates to the use of
a Mannich base, as described above, in the production of hardeners
for epoxy resins, especially having an enlarged processing
temperature range, for increasing the load-bearing capacity at
temperatures above room temperature or above 50.degree. C., and/or
for increasing the bond stress in the cured state, even at high
temperatures, for example at from 70 to 80.degree. C., in
comparison with other Mannich bases, such as especially those
produced with 1,2-diaminocyclohexane as amine.
[0051] A variant of the invention relates to the use of the Mannich
bases mentioned above (especially as described above further as
being preferred) or mentioned in the Examples in a multi-component
kit characterised above and below as being preferred.
[0052] In a further embodiment, the invention relates also to a
curable substance or especially to the use thereof in fixing, which
curable substance contains an epoxy component (a) which contains
curable epoxides (epoxy component), and a hardener component (b)
which comprises a mixture of styrenated phenols with low molecular
weight amines.
[0053] In a further embodiment, the invention relates also to the
use of a mixture of styrenated phenols with low molecular weight
amines as hardener component in the production of a curable
substance having curable epoxides for fixing purposes. Herein the
mixture of styrenated phenols with low molecular weight amines and
the curable epoxides are mixed together and brought to reaction,
preferably on-site, with the fixing of fixing elements, such as
anchoring elements, taking place simultaneously or immediately
afterwards.
[0054] An embodiment of the invention relates also to the use of a
Mannich base described hereinabove and hereinbelow in the
production of a composition, especially the hardener component of a
multi-component kit containing the components of such a
composition, for the fixing of anchoring elements in drilled
holes.
[0055] An embodiment of the invention relates also to the use of a
mixture of one or more styrenated phenols with one or more low
molecular weight amines, as described hereinabove and hereinbelow,
in the production of a composition, especially the hardener
component of a multi-component kit containing the components of
such a composition, for the fixing of anchoring elements in drilled
holes.
[0056] In a further embodiment, the invention relates also to the
use of a mixture of styrenated phenols with low molecular weight
amines as hardener component in the production of a curable
substance containing curable epoxides for fixing purposes for
increasing the load-bearing capacity at temperatures above room
temperature or above 50.degree. C., and/or for increasing the bond
stress in the cured state in comparison with corresponding curable
substances without the styrenated phenols.
[0057] Enhanced thermal stability results, for example, in better
scope for use for fixing purposes, even in the event of relatively
high temperatures e.g. in the drilled hole region of facade
anchorings that are exposed to strong sunlight or otherwise
increased temperatures.
[0058] Further additional ingredients are possible, for example
tertiary amino compounds, organic acids, such as carboxylic acids,
e.g. salicylic acid, or sulfonic acids, e.g. p-toluenesulfonic
acid, advantageously a tert-aminophenol (preferably added to
component (b)), especially a
2,4,6-tris(di-C.sub.1-C.sub.6alkylamino)phenol, preferably
2,4,6-tris(dimethylamino)phenol, in hardener components (b)
(especially containing Mannich base formulations used according to
the invention) as a constituent of (especially multi-component,
such as two-component) epoxy mortars.
[0059] In further advantageous embodiments, the invention relates
also to the use of curable substances according to the invention,
especially in the form of multi-component kits, especially
two-component kits, for the fixing of fibres, non-crimp fabrics,
woven fabrics or composites, especially made of high-modulus
fibres, preferably of carbon fibres, especially for reinforcement
of buildings, for example of walls or ceilings or floors; or,
further, for the fixing of building components, such as panels or
blocks, e.g. made of stone, glass or plastics, to structures or
building components; but especially for the fixing of anchoring
means, such as anchor rods, bolts or the like, in cavities, such as
drilled holes, wherein the components of the multi-component kit,
after being mixed beforehand and/or while being mixed (for example
by means of a static mixer or by rupturing a capsule or foil sachet
or by mixing components from multi-chambered buckets or sets of
buckets) are applied to the surface of a substrate or, in the case
of anchoring means, introduced into cavities, such as drilled
holes, in a substrate (e.g. masonry or concrete, or wood or
metal).
[0060] The invention relates especially to those variants of the
embodiments of the invention in which the compositions are not
aliphatic monoamines, or are not (meth)acrylate copolymers or they
are non-aqueous, or those variants wherein two or more of those
properties are realised.
EXAMPLES
[0061] The following Examples serve to illustrate the invention but
do not limit the scope thereof:
Abbreviations Used:
[0062] AEP N-(2-aminoethyl)piperazine BAC
1,3-bis(aminomethyl)cyclohexane BAPP
N,N'-bis(3-amino-n-propyl)piperazine DCH (comparison)
1,2-diaminocyclohexane IPDA
3-aminomethyl-3,5,5-trimethylcyclohexylamine MXDA m-xylylenediamine
TETA triethylenetetramine T.sub.g glass transition temperature
Example 1
Mortars Obtained with Mannich Base Formulations? for Use According
to the Invention and, as Comparison Tests, with Mannich Bases that
have been Obtained Using Amines Already Known in the Fixings
Sector
[0063] Using the amines AEP, BAC, BAPP, IPDA and, as comparison,
DCH, the corresponding Mannich base formulations were produced as
described at the beginning. The formulations were mixed together
with epoxy resin component and Portland cement in stoichiometric
amounts in accordance with the following Table.
[0064] An epoxy resin based on bisphenol A/F having a viscosity of
6000-8000 mPas/25.degree. C. and an epoxy equivalent of 175 is
mixed, in the amount indicated in the Table, with a further epoxy
resin based on trimethylolpropane having a viscosity of 120-180
mPas/25.degree. C. and an epoxy equivalent of 140, likewise in the
amount indicated in the Table. The mixture, consisting of the two
epoxy resins and the filler dispersed therein, is hardened at RT
for 24 h with the amount of the respective Mannich base
corresponding to the hydrogen equivalent, as listed in the
following Tables (e.g. stoichiometrically in this case, but greater
or lesser crosslinking can also be chosen).
[0065] Mortar component A (corresponding to (a) in the general
part) is produced in accordance with the following formulation:
TABLE-US-00001 Weight EP Hydrogen introduced Percent by Ingredient
equivalent equivalent [g] weight [%] EP resin based 175 -- 20.00
40.00 on bisphenol A/F EP resin based 140 -- 7.50 15.00 on
trimethylol- propane Cement -- -- 22.50 45.00 Total 50.00
100.00
[0066] (1) Analogously, the following amounts of component B, based
on 50 g of component A, are weighed out and introduced (Mannich
bases based on phenol and corresponding amine in brackets):
TABLE-US-00002 [0066] Weight Hydrogen introduced Ingredient
equivalent [g] MB 1 (BAC) 53 8.90 MB 2 (BAPP) 69 11.58 MB 3 (AEP)
68 11.41 MB 4 (IPDA) 61 10.24 MB 5 (DCH 45 7.55 comparison example
not according to the invention)
[0067] (2) Alternatively, the following amounts of component B,
based on 50 g of component A, are weighed out and introduced
(Mannich bases based on styrenated phenol and corresponding amine
in brackets):
TABLE-US-00003 [0067] Weight Hydrogen introduced Ingredient
equivalent [g] MB 6 (BAC) 77 12.93 MB 7 (BAPP) 92 15.44 MB 8 (AEP)
101 16.95 MB 9 (IPDA) 84 14.10 MB 10 (DCH 69 11.58 comparison
example not according to the invention)
[0068] The components listed here are weighed out and introduced in
succession and carefully mixed together. The resulting mixture is
then introduced into the corresponding moulds and hardened at RT
for 24 h and then tested. [0069] The following measured values are
obtained: [0070] In the case of mixtures containing component B
according to (1) with Mannich base from phenol itself and the amine
indicated in each case:
TABLE-US-00004 [0070] Compressive Tensile Bond strength strength
T.sub.g Viscosity Pull-out stress Amine [MPa] [MPa] [.degree. C.]
[mPas] [kN] [n/mm.sup.2] BAC 81 39 52 314 87 32 (MB1) BAPP 75 39 48
774 53 20 (MB2) AEP 69 29 50 497 70 26 (MB3) IPDA 66 11 44 1990 81
29 (MB4) DCH 66 6 43 203 58 22 (MB5)
[0071] Compared with the comparison using DCH, which is not
according to the invention, increased pull-out and bond stress
values and increased T.sub.g values (being an indirect measure of
increased thermal dimensional stability) as well as increased
tensile strength in all cases and increased compressive strength in
almost all cases are observed, with comparable viscosities. [0072]
In the case of mixtures containing component B according to (2)
with Mannich base from styrenated phenol and the amine indicated in
each case:
TABLE-US-00005 [0072] Compressive Tensile Bond strength strength
T.sub.g Viscosity Pull-out stress Amine [MPa] [MPa] [.degree. C.]
[mPas] [kN] [n/mm.sup.2] BAC 73 20 50 1259 83 28 (MB6) BAPP 68 30
50 2108 77 28 (MB7) AEP 59 5 47 2200 76 27 (MB8) IPDA 40 6 37 9427
52 19 (MB9) DCH 54 5 32 1720 34 12 (MB10)
[0073] Compared with the comparison using DCH, which is not
according to the invention, increased pull-out and bond stress
values and increased T.sub.g values (being an indirect measure of
increased thermal dimensional stability) as well as increased or
identical tensile strength in all cases and increased compressive
strength in almost all cases are observed, with comparable
viscosities.
Example 2
Mortars Obtained with Mixtures of Styrenated Phenol and Low
Molecular Weight Amine According to the Invention and for Use
According to the Invention
[0074] (3) Alternatively, the following amounts of component B,
based on 50 g of component A as described above, are weighed out
and introduced: (hardener without Mannich bases)
TABLE-US-00006 [0074] Weight Hydrogen introduced Ingredient
equivalent [g] Mixture 1 47 7.89 (MXDA/BAC) Mixture 2 47 7.89 (BAC)
Mixture 3 45 7.55 (MXDA) Mixture 4 57 9.57 (IPDA) Mixture 5 32 5.37
(TETA)
[0075] Using the amines BAC in admixture with MXDA (14 parts by
weight BAC to 1 part MXDA); BAC; MXDA; IPDA; and TETA, in each case
there was produced a mixture consisting of the amine in question
(without the presence of Mannich base), styrenated phenol (Novares
LS 500) and salicylic acid in a mixing ratio of 75:20:5 (w/w). The
mixtures were mixed in stoichiometric amounts (in respect of the
functionalities amino and epoxy) with component A (see Table in
Example 1) and used as a "curable substance" as described above for
the parameter determination.
[0076] Using the methods of parameter determination described at
the beginning, the following results were obtained:
TABLE-US-00007 Compressive Tensile Bond strength strength T.sub.g
Viscosity Pull-out stress Amine [MPa] [MPa] [.degree. C.] [mPas]
[kN] [n/mm.sup.2] BAC + 83 30 51 72 96 34 MXDA BAC 83 38 50 72 82
30 MXDA 84 39 50 58 90 33 IPDA 66 12 44 311 76 28 TETA 70 36 45 140
46 17
[0077] The mentioned mixtures exhibit very good values which, for
the most part, are even higher than when Mannich bases are used in
Example 1.
* * * * *