Osaka Soda Co., Ltd.

Yukinari Bunnomori

Tetsuya Nakata

Nobuo Yamada

Akira Hashimoto

Yasuto Takata

A cured or uncured composition of a homopolymer or copolymer of an epihalohydrin comprising a homopolymer or copolymer of an epihalohydrin, a curing amount of a curing agent therefor and an acid acceptor, characterized in that the curing agent and acid acceptor are free from a cyclic carboxylic acid anhydride and consist, based on 100 parts by weight of the epihalohydrin homopolymer or copolymer, of (a) a component selected from the group consisting of 1 to 200 parts by weight of an acid salt of 1 mole of a polybasic carboxylic acid with 1 mole of 1,8-diazabicyclo(5,4,0)undecene-7 and a mixture of 1 to 200 parts by weight of a polybasic carboxylic acid and 1 to 10 parts by weight of a neutral salt of 1,8-diazabicyclo(5,4,0)undecene-7, and (b) 1 to 20 parts by weight of a specific metal compound of Group II and Group IVa of the periodic table of elements.

Cured or uncured compositions of homopolymers and copolymers of

A cured or uncured rubber composition comprising 1. a rubber component about 1 to 100% of which consists of a homopolymer or copolymer of an epihalohydrin, 2. a curing amount of a curing agent therefor consisting of a salt of an ethylenically unsaturated monocarboxylic acid with 1,8-diazabicyclo(5,4,0) undecene-7 and an organic peroxide, and 3. an acid acceptor.

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Amagasaki, Japan

Yukinari Bunnomori