Acrylic copolymer elastomer, its blend rubber and blend rubber composition

摘要

A novel acrylic copolymer elastomer comprising [I] an alkyl acrylate; [II] (a) CH.sub.a ═CRCOOR.sub.2 OCOR.sub.1, (b) CH.sub.2 . dbd. CRCO[O(CH.sub.2) pCO]qOR.sub.1 or (c) CH.sub.2 ═CRCOOR.sub.2 [CO(CH. sub.2)pO]qCOR.sub.1 ; and [III] (1) CH.sub.2 ═CRCOO(CH.sub. 2)nPhOR', (2) CH.sub.2 ═CRCOO(CH.sub.2)nOCO(CH.sub.2)mPhOR', (3) CH. sub.2 ═ CHOCO(CH.sub.2)mPhOR', (4) CH.sub.2 ═CHOCO(CH.sub. 2) nOCO(CH.sub.2) mPhOR', (5) CH.sub.2 ═CHO(CH.sub.2)nOCO(CH.sub. 2) mPhOR' or (6) CH. sub.2 ═CHPh(CH.sub.2)nOCO(CH.sub.2)mPhOR' where R is a hydrogen atom or a methyl group, R.sub.1 is an alkyl group, R.sub.2 is an alkylene group, R' is a hydrogen atom, an acyl group or a trialkylsilyl group and Ph is a phenylene group, provides a blend rubber having an improved cold resistance and an intermediate heat resistance between the heat resistance of acrylic copolymer elastomer and that of fluorine-containing elastomer, when blended with the fluorine-containing elastomer.