Patent ID: 11965094
Assignee: WACKER CHEMIE AG
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A composition, comprising:
(A) at least one organopolysiloxane resin consisting of units of the formula

RaR1b(OR2)cSiO(4−a−b−c)/2   (I),, wherein
R are the same or different and are hydrogen or monovalent, SiC-bonded, optionally substituted hydrocarbon radicals free of aliphatic carbon-carbon multiple bonds,
R1 are the same or different and are monovalent, SiC-bonded, optionally substituted hydrocarbon radicals having aliphatic carbon-carbon multiple bonds,
R2 are the same or different and are a hydrogen or monovalent, optionally substituted hydrocarbon radicals,
a is 0, 1, 2 or 3,
b is 0 or 1 and
c is 0, 1, 2 or 3,
with the proviso that in formula (I) the sum of a+b+c≤3, in 15-30% of units of the formula (I) b=1, in at least 50% of the units of the formula (I) a+b=1, and in at most 10% of the units of the formula (I) a+b=3, based in each case on all siloxane units of the formula (I) in organopolysiloxane resin (A),
(B) organic compounds having at least one unit of the formula

CR32=CR3—CO—Z—  (II),, wherein
R3 are the same or different and are hydrogen, the cyano radical —CN, or a monovalent, optionally substituted hydrocarbon radical, optionally interrupted by heteroatoms,
Z are the same or different and are —O— or —NR5—, and
R5 are the same or different and are hydrogen or a monovalent, optionally substituted hydrocarbon radical optionally interrupted by heteroatoms
(C) initiators,
(D1) fine grained fillers having particle sizes less than 200 μm and coarse grained fillers having particle sizes of at least 0.2 mm, and
(K) amines,

wherein the initiators (C) are organic peroxides, and
wherein the amines (K) are organic compounds (K1) which do not comprise any silicon atoms, or are organosilicon compounds (K2)
wherein the amines (K1) are amines of the formula

R73N   (III),, where
R7 are the same or different and are hydrogen or a monovalent or divalent hydrocarbon radical which may be interrupted by heteroatoms and are optionally substituted by hydroxyl groups, halogen atoms, amino groups, ether groups, ester groups, epoxy groups, mercapto groups, cyano groups or (poly)glycol radicals,
with the proviso that in formula (III) at most two radicals R7 have the definition of a hydrogen atom, or an aliphatic cyclic amine, and
amines (K2) are amines consisting of units of the formula

R8kR10lSi(OR9)mO(4−k−l−m)/2   (IV),, in which
R8 are the same or different and are monovalent, SiC-bonded organic radicals free of basic nitrogen,
R9 are the same or different and have the definition specified for radical R2,
R10 are the same or different and are monovalent, SiC-bonded radicals having basic nitrogen,
k is 0, 1, 2, or 3,
l is 0, 1, 2, 3 or 4, and
m is 0, 1, 2 or 3,
with the proviso that the sum of k+l+m is less than or equal to 4 and at least one radical R10 is present per molecule, and wherein said composition comprises component (K) in amounts of from 0.001 to 5 parts by weight, based on 100 parts by weight of the total weight of components (A) and (B).