Patent ID: 6191212
Filing Date: 2001-02-20
Classification: C08G

Abstract:
A moisture-curing hotmelt adhesive containing:a) polyurethane prepolymers with a content of NCO groups of 0.16 to 0.84 moles of NCO groups per kg of prepolymer formed by reaction of (i) at least partly crystalline polyester polyols which are solid at room temperature and have a degree of crystallization of at least 30% and a number average molecular weight in the range from 2000 to 10,000, optionally in admixture with liquid polyester polyols which are liquid at 20.degree. C. and have a glass temperature below 0.degree. C., with amorphous polyester polyols which are solid at ambient temperature and have a glass temperature above 0.degree. C., with polyether polyols having a number average molecular weight of 500 to 10,000, or with mixtures of any two or more of said liquid polyester polyols, amorphous polyester polyols, and polyether polyols with (ii) isocyanates; having a functionality of more than 1 which are not isocyanurates andb) isocyanurates that are trimers of diisocyanates.