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US 6,359,098 B1Granted
Curable organopolysiloxane materials
AssigneeWacker Chemie AG
InventorsArmin Fehn, Frank Achenbach
Life of this patent
Estimating the term…
Abstract
Curable addition crosslinkable organopolysiloxane materials employing a platinum catalyst selected from the group consisting of compounds of the formula and/or oligomeric or polymeric compounds which are composed of structural units of the general formula and optionally structural units of the general formula R9rSiO(4−r)/2 in which R2, R3, R4, R6, R7, R8, R9, r, s and t have the meanings stated in claim 1, may be prepared as one-component formulations having prolonged shelf life, or as two-component formulations having prolonged pot life, while maintaining desirable chemical and physical properties.
Claims17
A curable organopolysiloxane composition comprising as curable components (A), (B), and/or (C):
- (A) one or more compounds which bear radicals having aliphatic carbon-carbon multiple bonds,
- (B) one or more organopolysiloxanes having Si-bonded hydrogen atoms, and
- (C) one or more organopolysiloxanes which have SiC-bonded radicals bearing aliphatic carbon-carbon multiple bonds and Si-bonded hydrogen atoms,
- wherein said curable component contains at least one of components (A) and (C) having aliphatic carbon-carbon multiple bonds and at least one of components (B) and (C) having Si-bonded hydrogen atoms, and
- (D) a platinum catalyst comprising at least one platinum catalyst of the formula III
- or an oligomeric or polymeric compound comprising structural units of the general formula
- and optionally structural units of the general formula
- R9rSiO(4−r)/2 (VI)
- in which
- R2 is an optionally substituted diene which is linked by at least one η-bond to platinum and represents a straight or a branched chain having 4 to 18 carbon atoms or a cyclic ring having 6 to 28 carbon atoms,
- R3 is identical or different and is a hydrogen atom, a halogen atom, —SiR43, —OR6, or a monovalent, optionally substituted hydrocarbon radical having 1 to 24 carbon atoms, with the proviso that, in the compounds of the formula (III), at least one radical R3 denotes —SiR43,
- R4 is identical or different and is hydrogen, a halogen atom, —OR6, or a monovalent, optionally substituted hydrocarbon radicals having 1 to 24 carbon atoms,
- R6 is identical or different and is a hydrogen atom, —SiR43, or a monovalent, optionally substituted hydrocarbon radical having 1 to 20 carbon atoms,
- R7 is identical or different and is a hydrogen atom, a halogen atom, —SiR43, —SiR4(3−t)[R8SiR9sO(3−s)/2]t, —OR6, or a monovalent, optionally substituted hydrocarbon radical having 1 to 24 carbon atoms, with the proviso that, in formula (V), at least one radical R7 denotes —SiR4(3−t)[R8SiR9sO(3−s)/2]t,
- R8 is identical or different and is oxygen, or a divalent, optionally substituted hydrocarbon radical having 1 to 24 carbon atoms, which may be bonded to the silicon via an oxygen atom,
- R9 is identical or different and is hydrogen or an organic radical,
- r is 0, 1, 2 or 3,
- s is 0, 1, 2 or 3 and
- t is 1, 2 or 3.
16 more elements
A platinum complex of the formula (III):
- R2 is an optionally substituted diene which is linked by at least one η-bond to platinum and represents a straight or a branched chain having 4 to 18 carbon atoms or a cyclic ring having 6 to 28 carbon atoms,
- R3 is identical or different and is a hydrogen atom, a halogen atom, —SiR43, —OR6, or a monovalent, optionally substituted hydrocarbon radical having 1 to 24 carbon atoms, with the proviso that, in the compounds of the formula (III), at least one radical R3 denotes —SiR43,
- R4 is identical or different and is hydrogen, a halogen atom, —OR6, or a monovalent, optionally substituted hydrocarbon radicals having 1 to 24 carbon atoms,
- R6 is identical or different and is a hydrogen atom, —SiR43, or a monovalent, optionally substituted hydrocarbon radical having 1 to 20 carbon atoms.
1 more element
A platinum complex comprising structural units of the formulae (V)
- R2 is an optionally substituted diene which is linked by at least one η-bond to platinum and represents a straight or a branched chain having 4 to 18 carbon atoms or a cyclic ring having 6 to 28 carbon atoms,
- R4 is identical or different and is hydrogen, a halogen atom, —OR6, or a monovalent, optionally substituted hydrocarbon radicals having 1 to 24 carbon atoms,
- R6 is identical or different and is a hydrogen atom, —SiR43, or a monovalent, optionally substituted hydrocarbon radical having 1 to 20 carbon atoms,
- R7 is identical or different and is a hydrogen atom, a halogen atom, —SiR43, —SiR4(3−t)[R8SiR9sO(3−s)/2]t, —OR6, or a monovalent, optionally substituted hydrocarbon radical having 1 to 24 carbon atoms, with the proviso that, in formula (V), at least one radical R7 denotes —SiR4(3−t)[R8SiR9sO(3−s)/2]t,
- R8 is identical or different and is oxygen, or a divalent, optionally substituted hydrocarbon radical having 1 to 24 carbon atoms, which may be bonded to the silicon via an oxygen atom,
- R9 is identical or different and is hydrogen or an organic radical,
- is 0, 1, 2 or 3,
- s is 0, 1, 2 or 3 and
- is 1, 2 or 3;
- and optionally (VI)
- R9rSiO(4−r)/2 (VI)
- R9 is identical or different and is hydrogen or an organic radical.
9 more elements
Dependencies are inferred from the claim text.