Patent ID: 11939472
Assignee: DUPONT TORAY SPECIALTY MATERIALS KABUSHIKI KAISHA
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  H | IPC C

Claim 0:
1. A curable silicone composition comprising:
(A) a resinous alkenyl group-containing organopolysiloxane including at least two alkenyl groups per molecule and at least one siloxane unit represented by SiO4/2 wherein the component (A) is represented by the following average unit formula(I);

(R13SiO1/2)a(R12SiO2/2)b(R1SiO3/2)c(SiO4/2)d(XO1/2)e   (I)

wherein
R1 may be the same or different and each is independently selected from the group consisting of C1-12 alkyl groups and C2-12 alkenyl groups, where at least two R1 in one molecule are alkenyl groups, 0<a<1, 0<b<1, 0<c<0.9, 0<d<1, 0<e<0.4, and a+b+c+d=1.0; and
X is a hydrogen atom or an alkyl group;

(B) an organohydrogenpolysiloxane having at least two silicon atom-bonded hydrogen atoms in one molecule wherein the organohydrogenpolysiloxane is a linear organohydrogenpolysiloxane having silicon atom-bonded hydrogen atoms on a side chain;
(C) an alkyne group-containing compound that is an alkyne group-containing silane selected from the group consisting of methyl-tris(1,1-dimethyl-2-butynoxy)silane, methyl-tris(3-methyl-1-butyn-3-oxy)silane, vinyl-tris (1,1-dimethyl-2-butynoxy)silane, and combinations thereof; and
(D) a curing catalyst, wherein the content of the resinous alkenyl group-containing organopolysiloxane (A) is 20 mass % or more based on the total mass of the organopolysiloxanes.