Patent ID: 6545087
Filing Date: 2003-04-08
Classification: C08G,C09K

Abstract:
A polyurethane prepolymer having alkoxysilane terminal groups which are produced by the reaction ofA) a linear polyurethane prepolymer with a number-average molecular weight from 15,000 to 50,000, as calculated from its NCO content and NCO functionality, produced by the reaction of i) an aromatic, aliphatic or cycloaliphatic diisocyanate component having an NCO content of 20% to 60% by weight, with ii) a polyol component which comprises a polypropylene oxide polyether diol having a maximum total degree of unsaturation of 0.04 milliequivalents/g and a number average molecular weight from 8000 to 20,000, as calculated from its OH content and functionality, with B) a compound of formula (I) â€ƒwherein R and Râ€² represent identical or different alkyl radicals comprising 1 to 8 carbon atoms, and X, Y, Z represent identical or different alkyl or alkoxy radicals comprising 1 to 4 carbon atoms, with the proviso that at least one of the radicals represents an alkoxy group.