公开(公告)号：US5120385A

公开(公告)日：1992-06-09

申请号：US691868

申请日：1991-04-26

申请人： Masaharu Takahashi ,  Jun Hatakeyama ,  Ken-ich Takita

发明人： Masaharu Takahashi ,  Jun Hatakeyama ,  Ken-ich Takita

IPC分类号： G03G15/20 ,  B29D99/00 ,  C08J9/10 ,  C08K3/36 ,  C08K5/14 ,  F16C13/00

CPC分类号： C08J9/103 ,  C08K3/36 ,  C08K5/14 ,  C08J2383/04

摘要： A process for preparing a silicone sponge roll, which comprises uniformly mixing a foamable silicone composition comprising (A) a vinyl-free organopolysiloxane R.sub.a SiO.sub.(4-a)/2 wherein R is a monovalent hydrocarbon or hydroxyl group and a is 1.95 to 2.05, (B) a finely divided silica filler, (C) an azodicarbonamide foaming agent, and (D) a diacyl peroxide, thereafter extruding the composition through an extruder, and thereafter foaming and vulcanizing the composition. The silicon sponge roll produced is suitable to form a fixing roll for use in electrographic copying machines.