Nippon Shokubai Kagaku Kogyo Co., Ltd.

Sokubai Kagaku Kogyo, Co., Ltd.

Masakazu Nakagawa

Yuichi Kita

Hitoshi Kanei

Kazuo Kishino

Kentaro Sakamoto

Akio Fukui

Takeshi Okuno

The present invention is directed to an acrylonitrile maleimides solution composition of highly desirable shelf like, having the acid component in said acrylonitrile maleimides soltuion adjusted to a level of no more than 0.1% by weight based on the amount of said maleimides contained in said solution and having a polymerization inhibitor in said solution adjusted to a level in the range of 0.0001 to 1% by weight based on the amount of said solution, and a method for the production thereof.

Acrylonitrile maleimides solution composition of improved shelf life and

A method for the production of a maleimide, which comprises effecting a former-stage reaction by adding maleic anhydride and a primary amine in amounts such that the molar ratio of said maleic anhydride to said primary amine is less than 1 under application of heat to a water-insoluble or water-immisible inert organic solvent containing an acid catalyst and subsequently carrying out a latter-stage reaction by adding to the reaction system maleic anhydride in an amount such that the molar ratio of the total amount of maleic anhydride to be added to said reaction system to the total amount of said primary amine added to said reaction system exceeds 1.

Method for production of maleimides

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Himeji, Japan

Masakazu Nakagawa