| 摘要 |
PURPOSE:To obtain a compsn. which can be firmly bonded to various adherends, by blending two specified organopolysiloxanes with a platinum catalyst and a specified bonding accelerator. CONSTITUTION:The following components (A) to (D) are blended. Namely, (A) an organopolysiloxane having at least two lower alkenyl groups per mole cule, represented by the average unit formula I, (B) an organopolyxiloxane having at least two hydrogen atoms attached to silicon atom per molecule and no alkenyl group, (C) a platinum catalyst and a reaction product (D) com posed of one pt.wt. tetraalkoxysilane (a) of formula II (wherein R<2> is an alkyl group), 0.1-100 pts.wt. organopolysiloxane or organosiloxane (b) having at least one alkenyl group or hydrogen atom attached to the silicon atom per molecule, represented by formula III (wherein R<3> is H or a monovalent org. group) and 0-19 pts.wt. alkoxysilane (c) of formula IV (wherein R<4> is H or a monovalent org. group; R<5> is an alkylene group; R<6> is a monovalent org. group; R<2> is as defined above; x is 0 or 1). |
