Moisture-Curable Hot Melt Silicone Adhesive Compositions Including An Alkoxy-Functional Siloxane Reactive Resin

摘要

A moisture-curable silicone adhesive composition is provided that comprises (A) a reactive resin, (B) a reactive polymer, (C) a moisture cure catalyst, and (D) a crosslinker resin. The reactive resin (A) comprises the reaction product of a reaction of an alkenyl-functional siloxane resin comprising R3SiO1/2 units and SiO4/2 units and an alkoxysilane-functional organosiloxane compound having at least one silicon-bonded hydrogen atom in the presence of a hydrosilylation catalyst. The reactive polymer (B) comprises the reaction product of a reaction of an alkoxysilane-functional organosiloxane compound having at least one silicon-bonded hydrogen atom and a polyorganosiloxane having an average, per molecule, of at least 2 aliphatically unsaturated organic groups in the presence of a hydrosilylation catalyst.

主权项

1. A moisture-curable hot melt silicone adhesive composition comprising:
(A) a reactive resin comprising the reaction product of a reaction of:an alkenyl-functional siloxane resin comprising R3SiO1/2 units and SiO4/2 units, wherein each R is independently a monovalent hydrocarbon radical having 1 to 6 carbon atoms with the proviso that at least one R is an alkenyl radical,wherein the molar ratio of the R3SiO1/2 units to SiO4/2 units has a value of from 0.5/1 to 1.5/1, a first alkoxysilane-functional organosiloxane compound having at least one silicon-bonded hydrogen atom; andin the presence of a first hydrosilylation catalyst;
(B) a reactive polymer comprising the reaction product of a reaction of:a second alkoxysilane-functional organosiloxane compound having at least one silicon-bonded hydrogen atom; anda polyorganosiloxane having an average, per molecule, of at least 2 aliphatically unsaturated organic groups;in the presence of a second hydrosilylation catalyst;
(C) a catalyst; and (D) a crosslinker.