Stabile silane modified polymer composition and method
AssigneeMomentive Performance Materials Inc.
InventorsMisty Weiyu Huang, Lesley Hwang, Matthew J. Pinnow
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Abstract
An alkoxysilyl-containing polyurethane polymer composition is prepared using a urethane-forming organometallic catalyst which is then stabilized to moisture exposure by the addition of a mercapto-containing compound. The stabilized moisture-curable alkoxsilyl-containing polyurethane polymer composition is activated to moisture curing by the addition of a hydrolysis and condensation catalysts. The stabilized moisture-curable alkoxsilyl-containing polyurethane polymer composition is useful as a component in the preparation of coatings, adhesives, sealants, consumer goods and industrial goods.
Claims26
A stabilized moisture curable alkoxysilyl-containing polyurethane polymer composition comprising:
- (a) at least one alkoxysilyl-containing polyurethane polymer;
- (b) at least one urethane-forming organometallic catalyst selected from the group consisting of:
- (i) catalytic organometallic salts of Sn, and (ii) catalytic organometallic complexes of Sn;
- and
- (c) at least one mercapto-containing compound in the amount of from about 100 to about 5,000 parts per million (ppm), based on the weight of the alkoxysilyl-containing polyurethane polymer;
- wherein the urethane-forming organometallic catalyst is used in the amount of from 1 to 100 parts per million, based on the weight of the metal in the polyol brought to reaction with isocyanato-containing alkoxysilane or polyisocyanate in the preparation of the alkoxysilyl-containing polyurethane, wherein the metal is the metal portion of the organometallic catalyst.
Dependencies are inferred from the claim text.