| abstract |
PURPOSE: To provide the title compsn. having excellent resistance to oils and solvents, compression recovery and mechanical strengths, consisting of a specified organopolysiloxane, a silical filler and a curing catalyst. n CONSTITUTION: 100pts.wt. organopolysiloxane (A) wherein at least one molecular terminal is blocked with a vinyl group, represented by formulas I and/or II [wherein R 1 , R 2 , R 3 and R 4 are each a 1W6C (un)substituted monovalent hydrocarbon group; R 5 is a 1W6C (un)substituted satd. monovalent hydrocarbon group; X is an atom or a group selected from the group consisting of H, R 5 and silyl groups (wherein R 6 and R 7 are each R 5 ); m=0W30; n≥500; p=2W4] is blended with 5W100pts.wt. silicon filler (B) having a specific surface area of 50m 2 /g or above (e.g., silica hydrogel) and 0.1|W10pts.wt. curing catalyst (C) (e.g., benzoyl peroxide). n COPYRIGHT: (C)1987,JPO&Japio |