Patent ID: 7345130
Filing Date: 2008-03-18
Classification: C09J,Y10T

Abstract:
1. An adhesive composition comprising a blend of: a) one or more silane functional prepolymers comprising a polyether or a polyolefin backbone and silane moieties capable of silanol condensation; b) one or more isocyanate functional prepolymers comprising a polyether backbone and isocyanate moieties wherein the isocyanate used is 1,3 phenylene diisocyanate, 1,4 phenylene diisocyanate, 2,4 tolylene diisocyanate, 2,6 tolylene diisocyanate, mixtures of 2,4 tolylene diisocyanate and 2,6 tolylene diisocyanate, diphenyl methane 2,4′ diisocyanate, diphenyl methane 4,4′ diisocyanate, mixtures of diphenyl methane 2,4′ diisocyanate and diphenyl methane 4,4′ diisocyanate, naphthalene 1,5 diisocyanate, triphenyl methane 4,4′, 4″ triisocyanate or polymeric derivatives of such isocyanates; c) one or more organotin compounds, titanates or zirconates having one or more ligands comprising a hydrocarbyl phosphate ester or a hydrocarbyl sulfonate ester, or a mixture thereof; and d) one or more anhydrous strong organic acids which are miscible with the prepolymers and enhances the bonding of the adhesive to a coated unprimed substrate.