US4741966A
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Organopolysiloxane composition curable by hydrosilylation containing platinum/triene complexes
Assignee: Rhone Poulenc Specialites Chimiques
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Filing: 1986-11-20
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Granted: 1988-05-03
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Expires: 2006-11-20
Abstract
Abstract Novel platinum/olefin complexes, useful for the hydrosilylation curing catalysis of hardenable organopolysiloxane compositions, are facilely prepared by reacting a platinum halide with at least one alkali or alkaline earth metal carbonate or bicarbonate in the presence of an aliphatic triene ligand having the general formula: <IMAGE> (I) wherein R1 is a linear or branched chain alkyl radical having from 1 to 6 carbon atoms, and R2 is R1 or a linear or branched chain alkenyl radical having from 2 to 16 carbon atoms and at least one site of ethylenic unsaturation, and said complex having a ratio, in gram-atoms of halogen to gram-atoms of platinum, ranging from virtually 0 to 4.
Inventors
- 👤 Jacques Cavezzan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:15
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/56; B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2282; B01J31/2291; C08L; C08L83/00; C08L83/04; B01J2231/00; B01J2231/10; B01J2231/14; B01J2231/30; B01J2231/32; B01J2231/323; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/828; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/20; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
142 words
A composition of matter comprising an organopolysiloxane curable by hydrosilylation comprising (1) at least one organopolysiloxane having, per molecule, at least two alkylenically unsaturated groups bonded to a silicon atom and (2) at least one organohydropolysiloxane having, per molecule, at least three .tbd.SiH groups, and a catalytically effective amount of a hydrosilylation catalyst which comprises a platinum/olefin complex comprising halogen values, the olefin moiety thereof which comprises an aliphatic triene having the general formula: ##STR11## wherein R 1 is a linear or branched chain alkyl radical having from 1 to 6 carbon atoms, and R 2 is R 1 or a linear or branched chain alkenyl radical having from 2 to 16 carbon atoms and at least one site of ethylenic unsaturation, and said complex having a ratio, in gram-atoms of halogen to gram-atoms of platinum, ranging from virtually 0 to 4.
Claim 2
Dependent Claim
142 words
A composition of matter comprising an organopolysiloxane curable by hydrosilylation comprising (1) at least one organopolysiloxane having, per molecule, at least two alkylenically unsaturated groups bonded to a silicon atom and (2) at least one organohydropolysiloxane having, per molecule, at least three .tbd.SiH groups, and a catalytically effective amount of a hydrosilylation catalyst which comprises a platinum/olefin complex comprising halogen values, the olefin moiety thereof which comprises an aliphatic triene having the general formula: ##STR11## wherein R 1 is a linear or branched chain alkyl radical having from 1 to 6 carbon atoms, and R 2 is R 1 or a linear or branched chain alkenyl radical having from 2 to 16 carbon atoms and at least one site of ethylenic unsaturation, and said complex having a ratio, in gram-atoms of halogen to gram-atoms of platinum, ranging from virtually 0 to 4.
Claim 3
Dependent Claim
149 words
The organopolysiloxane composition as defined by claim 1, comprising: (1) at least one organopolysiloxane containing silyloxy units of the formula: ##STR12## in which Y is an alkylenically unsaturated hydrocarbon group having from 2 to 4 carbon atoms, Z is an inert monovalent hydrocarbon, a ranges from 1 to 3; b ranges from 0 to 2 and the sum a+b ranges from 1 to 3, with any remaining units comprising units of the formula: ##STR13## in which Z is as defined above and c ranges from 0 to 3; and (2) at least one organohydropolysiloxane containing silyloxy units of the formula: ##STR14## in which W is Z, d ranges from 1 to 3, e ranges from 0 to 2, and d+e ranges from 1 to 3, with any remaining units comprising units of the formula: ##STR15## in which W is as defined above and g ranges from 0 to 3.
Claim 4
Dependent Claim
15 words
The organopolysiloxane composition as defined by claim 2, diluted in an organic solvent compatible therewith.
Claim 5
Dependent Claim
21 words
The organopolysiloxane composition as defined by claim 2, solvent-free, and having a viscosity no greater than 5000 mPa.s at 25° C.
Claim 6
Dependent Claim
12 words
A substrate coated with the organopolysiloxane composition as defined by claim 2.
Claim 7
Dependent Claim
13 words
The organopolysiloxane composition as defined by claim 2, further comprising a filler material.
References Cited (Backward Citations)
US4051454A
Cited
US4699813A
Cited
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