| 摘要 |
PURPOSE:To prepare the title compsn. having excellent lubricity and heat resis tance, by compounding a particular polyorganosiloxane oil with a polymethyl silsesquioxane powder. CONSTITUTION:100pts.wt. polyorganosiloxane oil (A) having a viscosity (25 deg.C) of at least 50cSt, pref. 1,000-500,000cSt and an Si-bonded organic group composed of a monovalent hydrocarbon group free from an aliph. unsatd. bond, pref. a straight-chain polydiorganosiloxane (e.g., polydimethylsiloxane) is compounded with 0.01-20pts.wt., pref. 0.1-5pts.wt. polymethylsilsesquioxane powder (B) having an average particle diameter of 0.05-50mum, pref. 0.1-20mum and, if necessary, additives (C) such as organic acid salts of metals, antioxidants, heat resistance improver, and oiliness improvers. |
