Asahi Kasei Kogyo Kabushiki Kaisha

Asahi Kasei Kabushiki Kaisha

Asahi Kasei Chemicals Corporation

Masahiko Otsuka

Hidekazu Ishimura

Hiroki Keno

Tadayoshi Ishikawa

Yasushi Takahashi

Daigo Satou

Provided is a multimaterial joint material that contributes to multimaterialization and a reduction in weight of a transport apparatus, the multimaterial joint material being configured from: a flame-retardant magnesium alloy; and a metal or alloy selected from the group consisting of aluminum alloys, titanium alloys, stainless steel, and steel. This multimaterial joint material is such that two or more layers of different types of metal materials are joined, wherein the multimaterial joint material is characterized in that: of the two or more layers of metal materials, at least one layer comprises a flame-retardant magnesium alloy, and another layer comprises a metal or alloy selected from the group consisting of aluminum alloys, titanium alloys, stainless steel, and steel; and the two or more layers of metal materials are joined together across the entire surface of joining surfaces that overlap each other.

Dissimilar metal joint including flame-retardant magnesium alloy layer

A master batch of hardener for curable one-package epoxy resin system which comprises (I) a hardener consisting of

Hardener for curable one-package epoxy resin system

There is provided a novel polymaleimide compound represent by the formula (a) ##STR1## The present polymaleimide compound has a curability comparable to that of an epoxy resin. In addition, it is noted that a cured product prepared from the present polymaleimide compound is excellent in heat resistance and adhesion property and has a low linear expansion coefficient as compared with an epoxy resin. The above-mentioned excellent characteristics of the present polymaleimide compound are never observed with respect to conventional maleimide resins. There is also provided specific compositions containing the present polymaleimide compound for exerting the excellent effects of the present polymaleimide compound most effectively.

Polymaleimide compound and composition containing the same

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Kurashiki, Japan

Masahiko Otsuka