Japan Synthetic Rubber Co., Ltd.

Toshio Ohhara

Toshio Miyabayashi

Hiroshi Ise

Hozumi Sato

Hiroji Enyo

Nobuyuki Sakabe

Yosihiro Ohira

Yukihiro Sawada

A hydrogenated copolymer rubber which is a hydrogenation product of a random copolymer rubber consisting of:

Hydrogenated copolymer rubber, rubber composition comprising said rubber

A novel ester group-containing (meth)acrylic acid ester represented by the general formula (I): ##STR1## wherein R.sup.1 is a hydrogen atom or a methyl group, R.sup.2 is a C.sub.3-20 alkylene group, R.sup.3 is a C.sub.1-20 hydrocarbon group or its derivative, and l is an integer of 1-20, and a (co)polymer composed of said ester group-containing (meth)acrylic acid ester and other monomer(s) copolymerizable therewith. This (co)polymer gives a crosslinked product superior in heat resistance, low-temperature resistance and oil resistance.

Novel ester group-containing (meth)acrylic acid ester, novel (co)polymer

An acrylic rubber obtainable by copolymerizing a monomer mixture of:

Acrylic rubber, acrylic rubber composition and cured rubber article

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Yokkaichi, Japan

Toshio Ohhara