Moisture curable organopolysiloxane compositions
AssigneeMomentive Performance Materials Inc.
InventorsSumi Dinkar, Anantharaman Dhanabalan
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Abstract
The present invention provides curable compositions that are substantially free of metal catalysts including both tin and non-tin metal catalysts. The curable compositions employ a catalyst system comprising the combination of a carboxylic acid, an amino-containing adhesion promoter or a mixture of amine-containing adhesion promoters and an amino-containing siloxane. The combination of these materials accelerates the condensation curing of moisture curable silicones/non-silicones even in the absence of a metal-based catalyst.
Claims28
A composition for forming a cured polymer composition comprising:
- (A) a polymer having at least a reactive silyl group;
- (B) a crosslinker or chain extender chosen from an alkoxysilane, an alkoxysiloxane, an oximosilane, an oximosiloxane, an enoxysilane, an enoxysiloxane, an aminosilane, a carboxysilane, a carboxysiloxane, an alkylamidosilane, an alkylamidosiloxane, an arylamidosilane, an arylamidosiloxane, an alkoxyaminosilane, an alkarylaminosiloxane, an alkoxycarbamatosilane, an alkoxycarbamatosiloxane, and combinations of two or more thereof;
- (C) a carboxylic acid component;
- (D) at least one amino-containing adhesion promoter chosen from a silane or siloxane other than the compounds listed under (B);
- (E) optionally an amino-functional siloxane;
- and
- (F) optionally a filler component, wherein the composition is substantially free of a metal-based catalyst.
Dependencies are inferred from the claim text.