Patent ID: 7482420
Filing Date: 2009-01-27
Classification: C08G,C09D

Abstract:
1. A method for making a silane-terminated polyurethane composition comprising: a) providing a prepolymer component, a monomeric component, and optionally at least one multifunctional component, wherein the prepolymer component comprises a silane-terminated polyurethane prepolymer, the monomeric component comprises a silane-terminated monomeric diisocyanate, and the optional multifunctional component comprises at least one of a trisilane, a tetrasilane, or a silane adduct component; and b) combining and reacting the prepolymer component, the monomeric component, and optionally the at least one multifunctional component to form a silane-terminated polyurethane reaction product; wherein the silane-terminated polyurethane reaction product has a tensile strength of about 4 MPa or greater and an elongation of about 200% or greater; and, wherein the prepolymer component comprises a silane-terminated polyurethane prepolymer component comprising a prepolymer reaction product of at least one diisocyanate and at least one polyol with a mole ratio of isocyanate groups to hydroxyl groups of about 0.5:1 to about 0.9:1, said prepolymer reaction product is further reacted with a monomeric diisocyanate, followed by termination with an aminosilane endcapper of the formula: or a mercaptosilane endcapper of the formula: wherein R represents a C