| 摘要 |
PURPOSE:To provide the titled composition having high rate of cure and low peeling resistance, and resistant to the viscosity lowering of the adhesive, by compounding a specific organopolysiloxane with an organohydrogen polysiloxane and platinum or a platinum compound catalyst. CONSTITUTION:The objective composition can be prepared by compounding (A) an organopolysiloxane of formula II (R<3> is univalent hydrocarbon group; b<=3) having molecular chain terminals blocked with the organosiloxy group of formula I (R<1> is univalent aliphatic unsaturated hydrocarbon group; R<2> is univalent hydrocarbon group; a is 2 or 3) and an unsaturated group content of 0.05-15mol% with (B) the organohydrogen polysiloxane of formula III (c+d<=3) containing preferably >=3 identicalSiH bonds in a molecule and (C) platinum or a platinum compound catalyst. The molar ratio of the unsaturated group in the component A to the identicalSiH group in the component B is 0.2-2, and the amount of the component C is 0.01-0.1% based on the sum of the components A and B, in terms of platinum. |
