| 摘要 |
<p>PURPOSE:The titled composition, excellent in wear resistance, oil resistance, durability and motor oil-sealing property, which comprises an organosiloxane raw rubber, a reinforcing silica filler, diatomaceous earth, an organohydrogenpolysiloxane and an organic peroxide. CONSTITUTION:A composition which comprises (A) 100pts.wt. of an organopolysiloxane raw rubber of average unit formula RaSiO(4-a)/2 (wherein R is a monovalent hydrocarbon group; a is 1.98-2.02), (B) 5-100pts.wt. of a reinforcing silica filler, (C) 5-100pts.wt. of diatomaceous earth, (D) 0.01-10pts.wt. of an organohydrogenpolysiloxane of average unit formula RbHcSiO(4-b-c)/2 (wherein R is a nomovalent hydrocarbon group; b is 1-2; C is 0.1-1.2; b+c=1.8-2.2) and (E) 0.1-10pts.wt. of an organic peroxide.</p> |
