Patent ID: 8247079

Claim:
A laminate comprising a backing material having a cured pressure sensitive adhesive composition applied thereto, the adhesive composition including a silylated polyurethane prepolymer prepared from a process which comprises: (a) reacting a polyol being a blend of two or more polyester polyols possessing an average of hydroxyl group of the blend ranging from about 2.05 to about 2.75 with at least one polyisocyanate in the presence of a catalyst at a molar ratio of NCO to OH from about 0.3 to about 0.95 to provide a hydroxyl-terminated polyurethane prepolymer, (b) reacting said hydroxyl-terminated polyurethane prepolymer with an isocyanatosilane to form said silylated polyurethane prepolymer, wherein less than 95% of the hydroxyl-terminated polyurethane prepolymer is silylated, and wherein the weight percent of Si in the silylated polyurethane prepolymer is from 0.098% to 0.118%, with the proviso that if said polyester polyol comprises a crystalline polyester diol, said diol has a melting point of less than 50° C.