| 摘要 |
PURPOSE:To obtain the subject composition outstanding in heat resistance and electrical properties, by incorporating a vinyl group-contg. organopolysiloxane with an organic solvent-soluble platinum compound and a specific organosilicon compound. CONSTITUTION:The objective composition can be obtained by incorporating (A) 100 pts.wt. of an organopolysiloxane of the formula [R<1> are the same or different kinds of (substituted) monovalent hydrocarbon groups, 0.1-30mol% of them being vinyl group; a is 1.8-2.3) with (B) 0.0001-0.1 pts.wt. on a platinum basis, of an organic solvent-soluble platinum compound, e.g., a complex compound from vinylsiloxane and platinum compound and (C) 0.01-10 pts.wt. of an organosilicon compound selected from C1; methalosiloxane compounds, C2; organosilanes or organopolysiloxanes containing aromatic amine structure respectively, and C3; organosilanes or organopolysiloxanes containing hindered phenol structure. |
