Hodogaya Chemical Co., Ltd.

Oji Paper Co., Ltd.

Mochida Seiyaku Kabushiki Kaisha

Shigeo Maeda

Minoru Ozutsumi

Takahiro Tsunoda

Susumu Suzuka

Hidetoshi Komiya

Nobuo Suzuki

Takayuki Sakai

Hideaki Shinohara

Isao Niimura

Hideo Okazaki

Takeo Kurahashi

Sanai Seki

There are disclosed azo compounds represented by the formula: ##STR1## wherein X is hydrogen or halogen. The azo compounds are useful as precursors of disperse dyes and basic dyes and are effective for therapeutic treatment.

2-[(2-Methoxy-5-halo)azo]-1-H-imidazoles and method of production of

A heat transfer printing is carried out by quaternizing an indolenine methine compound with acidic groups of an acidic modified synthetic fiber.

Heat transfer printing on acidic modified synthetic fiber

A photosensitive color-forming element comprises a support and a photosensitive color-forming layer formed on said support and containing therein at least one photosensitive color-forming azido compound of the formula ##STR1## wherein [A] is a benzene ring or naphthalene ring, R.sub.1 and R.sub.2 each is a hydrogen or halogen atom or alkyl, alkoxyl, dialkylamino, acyl, acylamino, nitro or hydroxyl radical, and R.sub.3 is a hydrogen or halogen atom, or alkyl, alkoxyl, nitro, carboxyl, alkylcarboxyl, dialkylcarbamoyl, sulfonic acid, dialkylaminosulfonyl, alkylsulfonyl or acyl radical or a group of the formula (II), (III), (IV) or (V): ##STR2## in which formula X is an --O-- bonding or --NH-- bonding.

Photosensitive azido color-forming element

A photosensitive color-forming element comprises a support and a photosensitive color-forming layer carried on the support and containing therein a color-forming coupler, for example, 1-naphthol, 2-naphthol and 2,4-dichloro-1-naphthol, and a photosensitive azido compound of the formula (I) or (II): ##STR1## wherein R.sub.1 represents a hydrogen or halogen atom or an alkyl, alkoxyl, diethylamino or hydroxyl radical R.sub. 2 an alkyl, alkoxyl or hydroxyl radical, and R.sub.3 a hydrogen atom or an alkyl or phenyl radical, and, if necessary, a polymeric material capable of hardening or being insolubilized in solvent when the polymeric material is exposed to radiation rays in the presence of the above azido compound, the above-mentioned azido compound and color-forming coupler being capable of forming a dark color upon exposure to radiation rays, without a color-developing agent.

Photosensitive azide compound containing color-forming element

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Tokyo, Japan

Shigeo Maeda