Curable Silicone Composition And Cured Product Thereof

摘要

A curable silicone composition comprising: (A) an organopolysiloxane that has at least a straight-chain polysiloxane block represented by the general formula: —R1R2SiO)m—, wherein R1 is a C1-6 alkyl group or the phenyl group, R2 is a C2-10 alkenyl group, and m is a positive number from 5 to 50; (B) an organopolysiloxane that has at least a straight-chain polysiloxane block represented by the general formula: —(R3HSiO)n—, wherein R3 is a C1-6 alkyl group or the phenyl group and n is a positive number from 10 to 100; and (C) a hydrosilylation reaction catalyst, cures to form a cured product that has a small thermal expansion coefficient.

主权项

1. A curable silicone composition comprising:
(A) an organopolysiloxane that has at least a straight-chain polysiloxane block represented by the following general formula:
—(R1R2SiO)m—  wherein R1 is a C1-6 alkyl group or a phenyl group, R2 is a C2-10 alkenyl group, m is a positive number from 5 to 50, and the content of this straight-chain polysiloxane block is 20 to 60 mass % of the total amount of the organopolysiloxane in this composition; (B) an organopolysiloxane that has at least a straight-chain polysiloxane block represented by the following general formula:
—(R3HSiO)n—  wherein R3 is a C1-6 alkyl group or a phenyl group, and n is a positive number from 10 to 100, in a quantity that provides from 0.5 to 5 moles of the silicon-bonded hydrogen atoms in this component per 1 mole of the alkenyl groups in component (A); and (C) a hydrosilylation reaction catalyst in a catalytic quantity.