Gel-forming silicone composition
First Claim
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1. A gel-forming silicone composition comprising:
- (A) an organopolysiloxane containing a silicon-bonded vinyl group in an average amount of from 0.15 to 0.35 mol % based on the amount of all the silicon-bonded organic groups contained in its molecule;
(B) from 10 to 150 parts by weight per 100 parts by weight of the component (A), a non-functional organopolysiloxane other than (C) having the following average composition formula (2);
space="preserve" listing-type="equation">(R.sup.3).sub.c Sio.sub.(4-c)/2 (
2) wherein R3 is a substituted or unsubstituted non-functional monovalent hydrocarbon group, and c has a value of from 2.0 to 2.2, component (B) having a viscosity at 25°
C. not higher than the viscosity at 25°
C. of the component (A);
(C) an organohydrogenpolysiloxane containing an average of from 1 to 3 silicon-bonded hydrogen atoms per molecule present in an amount such that the amount of the silicon-bonded hydrogen atoms in the component (C) is from 0.8 to 2.0 moles per mole of the vinyl groups in the component (A); and
(D) an addition reaction catalyst.
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Abstract
A gel-forming silicone composition comprising (A) an organopolysiloxane containing a silicon-bonded alkenyl group or groups in an average amount of from 0.15 to 0.35 mol % based on all silicon-bonded organic groups contained per molecule, (B) a non-functional organopolysiloxane, (C) an organohydrogenpolysiloxane containing an average of 2 silicon-bonded hydrogen atoms per molecule, and (D) an addition reaction catalyst. The silicone composition is able to give a gel-like cured silicone product with low modulus of elasticity while retaining flexibility.
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Citations
6 Claims
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1. A gel-forming silicone composition comprising:
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(A) an organopolysiloxane containing a silicon-bonded vinyl group in an average amount of from 0.15 to 0.35 mol % based on the amount of all the silicon-bonded organic groups contained in its molecule; (B) from 10 to 150 parts by weight per 100 parts by weight of the component (A), a non-functional organopolysiloxane other than (C) having the following average composition formula (2);
space="preserve" listing-type="equation">(R.sup.3).sub.c Sio.sub.(4-c)/2 (
2)wherein R3 is a substituted or unsubstituted non-functional monovalent hydrocarbon group, and c has a value of from 2.0 to 2.2, component (B) having a viscosity at 25°
C. not higher than the viscosity at 25°
C. of the component (A);(C) an organohydrogenpolysiloxane containing an average of from 1 to 3 silicon-bonded hydrogen atoms per molecule present in an amount such that the amount of the silicon-bonded hydrogen atoms in the component (C) is from 0.8 to 2.0 moles per mole of the vinyl groups in the component (A); and (D) an addition reaction catalyst. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification