Toyoda Gosei Co., Ltd.

Sumitomo Chemical Company, Limited

Kabushiki Kaisha Toyota Chuo Kenkyusho

Masataka Sasayama

Tadanobu Iwasa

Isao Kurimoto

Masahiro Sugiura

Mitsumasa Horii

Hidenori Hayashi

Masaki Ohashi

Rikizou Nakata

Takayoshi Saiki

An ethylene propylene rubber composition is disclosed, comprising 100 parts by weight of a polymer component, at least 5 parts by weight of a softener, and a hydrated magnesium silicate-based clay mineral in an amount of from 0.05 to 0.5 times the weight of said softener. The rubber composition provides a molded article free from bleeding of softeners.

Ethylene propylene rubber composition

A rubber composition for producing sponge rubber products which comprises 1 to 20 parts by weight of a blowing agent and 0.1 to 0.8 part by weight of sulfur relative to 100 parts by weight of an ethylene-.alpha.-olefin-non-conjugated dienes tetrapolymer containing as non-conjugated dienes the ethylidene-norbornene component amounting to 15 to 30 in terms of iodine value and the dicyclopentadiene component amounting to 1 to 10 in terms of iodine value and having a branching index of at least 2.

Rubber composition for producing sponge rubber product

Growing community of inventors

Aichi, Japan

Masataka Sasayama