Osaka Yuki Kagaku Kogyo Kabushiki Kaisha

Kabushiki Kaisha Alpha Giken

Osaka Yuki Kagako Kogyo Kabushiki Kaisha

Akio Tani

Minoru Fukuzawa

Eisuke Hirakawa

Shigeaki Matsumoto

Takashi Kato

Shinobu Nishimoto

Yukio Tanaka

Mitsumasa Matsunaga

The invention provides a shaped resin article for optical use which is a three-dimensional reaction product cast from a molding composition essentially comprising a tetrahalobisphenol A epichlorohydrin polycondensate-(meth)acrylic acid adduct (A) and a polyisocyanate compound (B). In another aspect of the invention, the resin article is cast from a composition containing a styrenic or ester monomer (C) in addition to (A) and (B). In still another aspect, the resin article is cast from a composition containing a phenolic compound (D) in addition to (A), (B) and (C).

Optical resin articles

This invention relates to a method for the purification of glycidyl acrylate or glycidyl methacrylate. Specifically, the invention effects the purification by using a residual catalyst-inactivating additive and consequently produces highly purified glycidyl acrylate or glycidyl methacrylate containing substantially no epichlorohydrin and having a low chlorine content.

Method for purification of glycidyl acrylate or glycidyl methacrylate

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Habikino, Japan

Akio Tani