Silicone Composition, Silicone Adhesive, Coated and Laminated Substrates

摘要

A silicone composition and more particularly to a silicone composition comprising at least one organosilicon compound having an average of at least two silicon-bonded hydrogen atoms per molecule, at least one silicone resin having the formula (R1R4R5SiO1/2)w(R12SiO2/2)x(R4SiO3/2)y(SiO4/2)z (II), wherein R1 is C1 to C10 hydrocarbyl or C1 to C10 halogen-substituted hydrocarbyl, both free of aliphatic unsaturation, R4 is C2 to C4 alkenyl, R5 is R1 or R4, w is from 0.01 to 0.6, x is from 0 to 0.5, y is from 0.1 to 0.95, z is from 0 to 0.4, and w+x+y+z)=1, and a hydrosilylation catalyst; a silicone adhesive comprising a cured product of the silicone composition, and a coated substrate and a laminated substrate, each comprising the silicone adhesive.

主权项

1. A silicone composition, comprising:
(A) at least one organosilicon compound having an average of at least two silicon-bonded hydrogen atoms per molecule; (B) at least one silicone resin having the formula (R1R4R5SiO1/2)w(R12SiO2/2)x(R4SiO3/2)y(SiO4/2)z (II), wherein R1 is C1 to C10 hydrocarbyl or C1 to C10 halogen-substituted hydrocarbyl, both free of aliphatic unsaturation, R4 is C2 to C4 alkenyl, R5 is R1 or R4, w is from 0.01 to 0.6, x is from 0 to 0.5, y is from 0.1 to 0.95, z is from 0 to 0.4, and w+x+y+z≈0.1; and (C) a hydrosilylation catalyst; wherein the ratio of the number of moles of alkenyl groups in the silicone resin (B) to the number of moles of silicon-bonded hydrogen atoms in the organosilicon compound (A) is from 0.005 to 0.83.