Patent ID: 7319128
Filing Date: 2008-01-15
Classification: C08G,Y10S

Abstract:
1. A process for preparing storage stable organyloxysilyl-terminated polymers (A) having a plurality of terminal groups of the formula comprising reacting an organic polymer having at least six carbon atoms which may be interrupted with heteroatoms, and which contains a plurality of hydroxyl groups, with one or more isocyanate-functional silanes of the formula in the presence of at least one urethane reaction promoting catalyst selected from the group consisting of bismuth and zinc compounds, wherein R are each divalent, optionally substituted hydrocarbon radicals having from 1 to 12 carbon atoms which may be interrupted by heteroatoms, R R n is 1, 2 or 3, and packaging said polymers as a one-component moisture-curable composition, wherein the polymers (A) are stable with respect to moisture curing in the absence of a moisture cure catalyst other than the bismuth or zinc compounds used to prepare the polymer wherein said organyloxysilyl-terminated polymer (A) is one of the formula prepared by reacting one or more α,ω-dihydroxy-terminated polymers of the formula with said isocyanato-functional silane(s), where A is a divalent, optionally substituted hydrocarbon radical having at least six carbon atoms, optionally interrupted by one or more O, N, or S heteroatoms with the proviso that radical A does not contain a polyurethane.