| 摘要 |
<p>A silicone rubber composition comprising (A) 100 parts by weight of a polyorganosiloxane having, per molecule, at least two structural units represented by the following formula: (R<1>)a(R<2>)bSiO(4-(a+b))/2 (I> wherein R<1> represents an alkenyl group; R<2> represents a substituted or unsubstituted monovalent hydrocarbon group containing no aliphatic unsaturated bonds; a represents 1 or 2; b represents 0, 1, or 2; and a+b represents 1, 2, or 3, (B) a polyorganohydrogensiloxane comprising structural units shown by the following formula: (R<3>)cHdSiO(4-(c+d))/2 (II> wherein R<3> represents a substituted or unsubstituted monovalent hydrocarbon group; c represents 0, 1, or 2; d represents 1 or 2; and c+d represents 1, 2, or 3 and having at least three silicon-bonded hydrogen atoms per molecule, the amount of component (B) being such that the number of silicon-bonded hydrogen atoms in component (B) is from 0.5 to 4.0 per R<1> group in the structural units shown by formula (I) of component (A), (C) from 0.1 to 10 parts by weight of a compound selected from the group consisting of an organosilicon compound having, per molecule, at least one silicon-bonded hydrogen atom and at least one group represented by the following formula: <CHEM> wherein Q<1> and Q<2> each represents a divalent hydrocarbon group; c 4> and R<3> each represents a monovalent hydrocarbon group having from 1 to 4 carbon atoms; and e represents 0 or 1 and an acrylic- or methacrylic-functional silane coupling agent, (D) from 0.1 to 10 parts by weight of an epoxyalkylalkoxysilane represented by the following formula: X-Q<3>-Si(R<6>)f(OR<7>)3-f (IV> wherein Q<3> represents a divalent hydrocarbon group having from 1 to 4 carbon atoms; R<6> and R<7> each represents a monovalent hydrocarbon group having from 1 to 4 carbon atoms; X represents glycidoxy group or epoxycyclohexyl group; and f represents 0 or 1, (E) from 0 to 5 parts by weight of an aluminum chelate compound, and (F) platinum and/or a platinum compound in an amount of from 1 to 100 ppm of the polyorganosiloxane, component (A), in terms of the amount of platinum atoms. e</p> |
