Ihara Chemical Industry Co., Ltd.

Susumu Shimoyama

Satoru Shimoyama

Eiichi Eto

Yasuko Noda

Kunio Kataoka

Ujo Maeda

Keiko Maeda

Tasuku Shimoyama

Masamichi Shimizu

Teiichi Kanazawa

Yoshio Hara

Kazumi Konya

Mieko Goto

Process for production of black coloring material and cosmetics

A novel black coloring material is obtained by treating a chitosan with a dyestuff of the lithospermum root. If a water-insoluble chitosan is used as the chitosan, a finely divided black coloring material is obtained, and if a gelatinous chitosan salt is used as the chitosan, a gelatinous black coloring material is obtained. If a water-soluble chitosan, chitosan oligosaccharide or D-glucosamine, or a salt thereof is used as the chitosan, a liquid black coloring material is obtained. If a powdery polymeric substance is treated with such a black coloring material, a polymer-based black coloring material is obtained, and if a fiber is dyed with such a black coloring material, the fiber is dyed to a black color having a low lightness.

Process for preparation of black coloring materials and application

Phenylacetic acid is produced by reacting chlorotoluene with sodium to form tolylsodium, rearranging the product to benzyl sodium and then reacting the benzyl sodium with a carboxylating agent.

Process for producing benzyl sodium, phenylacetic acid and derivative

Growing community of inventors

Hasuda, Japan

Susumu Shimoyama