| 摘要 |
PURPOSE:The titled composition, obtained by incorporating a specific amount of a specific organosiloxane with an organopolysiloxane, and having improved heat aging resistance for a long period. CONSTITUTION:An organopolysiloxane composition obtained by incorporating (A) 100pts.wt. chain organopolysiloxane which is an oil at ordinary temperature and has 20-10,000cs viscosity, e.g. straight chain diorganopolysiloxane having molecular chain ends blocked with triorganosilyl groups with (B) 0.01-20pts.wt., preferably 1-10pts.wt. organosiloxane expressed by formula I or II [Q is formula III or IV; R<1> is methyl or phenyl; R<2> and R<3> are 1-14C alkyl, phenyl, etc.; a is 0-50; b+c is 1-50; c/(b+c) is 0.1-1]. |
