Patent ID: 8394909

Claim:
A silane-terminated polyurethane composition comprising the reaction product of: a) a silane-terminated polyurethane prepolymer component comprising at least one of: a prepolymer reaction product of at least one diisocyanate and at least one polyol with a mole ratio of isocyanate groups to hydroxy groups of about 1.1:1 to about 2:1, said prepolymer reaction product terminated with an aminosilane endcapper of the formula: R—NH—A 1 —Si(R 1 ) x (OR 2 ) 3-x wherein R represents a C 1 to C 10 alkyl group, a group having the formula —A 1 —Si(R 1 ) x (OR 2 ) 3-x , or a group having the formula —CH(COOR 3 )—CH 2 (COOR 4 ); A 1 represents a C 1 to C 10 linear, branched or cyclic alkylene group; R 1 represents a CH 3 or C 2 H 5 group; R 2 represents a C 1 to C 4 alkyl group; R 3 represents a C 1 to C 13 alkyl group; R 4 represents a C 1 to C 13 alkyl group; and x is 0 or 1; b) a silane-terminated monomeric diisocyanate component comprising at least one monomeric diisocyanate fully reacted with an aminosilane endcapper of the formula: R—NH—A 1 —Si(R 1 ) x (OR 2 ) 3-x wherein R represents a C 1 to C 10 alkyl group, a group having the formula —A 1 —Si(R 1 ) x (OR 2 ) 3-x , or a group having the formula —CH(COOR 3 )—CH 2 (COOR 4 ); A 1 represents a C 1 to C 10 linear, branched or cyclic alkylene group; R 1 represents a CH 3 or C 2 H 5 group; R 2 represents a C 1 to C 4 alkyl group; R 3 represents a C 1 to C 13 alkyl group; R 4 represents a C 1 to C 13 alkyl group; and x is 0 or 1; and c) optionally a trisilane or tetrasilane component comprising at least one of a polyether trisilane component, a polyether tetrasilane component, or a silane adduct comprising at least one of a trisilane adduct or a tetrasilane adduct; wherein the reaction product has a tensile strength of about 4 MPa or greater and an elongation of about 200% or greater.