| abstract |
An acrylic copolymer rubber which is a random copolymer ofn (A) a cyano group-containing acrylate or methacrylate of the following formula (I):n nwherein R 1 is hydrogen or methyl, and R 2 is -C n H 2n - or -CH 2 CH 2 -O-CH 2 CH 2 -, wherein n is an integer of from 2 to 4, (B) at least one of ethyl acrylate and n-butyl acrylate, and (C) at least one of glycidyl methacrylate and allyl glycidyl ether, or vinyl chloroacetate, nwherein the amounts of units derived from the above (A), (B) and (C) in said copolymer are from 5 to 70% by weight, from 20 to 94.5% by weight and from 0.5 to 10% by weight, respectively, and which has a Mooney viscosity ML 1 + 4 (100° C) of at least 5. |