Moisture cured polyurethane hot melt adhesives with reactive tackifiers

摘要

This invention relates to hot melt polyurethane adhesive or sealant compositions which are solid at room temperature. The adhesive or sealant compositions comprise a hot melt polyurethane adhesive or sealant composition comprising (a) a urethane prepolymer; (b) a polyester resin; and (c) a reactive tackifier represented by the formula: wherein R is selected from the group consisting of tall oils, abietic acid, isomeric mixtures of abietic acid, and mixtures thereof, and n is an integer from 1 to about 4.