Patent ID: 6265474
Filing Date: 2001-07-24
Classification: C08K

Abstract:
A rubber composition comprising:a solid NBR;(A) a carbocyclic phosphite compound represented by the following general formula, ##STR5##wherein R is an alkyl group having a carbon number of integer of 8 to 24, or a mono-, di- or tri- submitted phenyl group by alkyl group having a carbon number of integer of 1 to 10;(B) an ester compound of phosphoric acid represented by the following general formula and having an acid value of about 150 to 800 KOHmg/g. ##STR6##wherein R' is hydrogen or an alkyl group having a carbon number of integer of 1 to 13, and R"" is an alkyl group having a carbon number of integer of 1 to 13;(C) an ethylene-.alpha.-olefin copolymer rubber having a number average molecular weight (Mn) of 10.sup.4 to 10.sup.6 ; and(D) a liquid NBR.