Nippon Kayaku Kabushiki Kaisha

Toru Tabei

Yasuo Shirasaki

Takashi Miyazawa

Yoshitaka Kajiwara

Isao Yamaguchi

Shoji Oiso

Kumiko Ishii

Hiroyuki Matsumoto

Hiroaki Ono

Yasuo Murakami

Katsunori Fujii

Eiichi Ogawa

Junko Yoshioka

Hirokazu Kitayama

Kazunobu Nagasaki

Shin-ichi Namba

This invention relates to a polyvinyl alcohol type polarizing film or plate which comprises a water-soluble dye having the formula (1) in a free acid form or a copper complex salt thereof. The said polarizing plate has excellent polarizing performance capability and durability, and is suitably used for the green channel of a liquid crystal projector when B in formula (1) is a benzoylamino group and the water-soluble dye has a wave length for maximum absorption (&#x3bb;max) of 520 nm or more and less than 580 nm 

Dye type polarizing plate

An aqueous ink composition which comprises a compound represented by the formula (1) or the salt thereof: (1) wherein Rand Rindependently represent a hydrogen atom, an alkyl group, an alkoxy group, an alkanoylamino group, an alkoxyalkoxy group, a sulfonic acid group, a carboxyl group or an ureido group, m and n independently represent 1 or 2, and Mrepresents a cation from a hydrogen atom, an alkali metal, an alkaline earth metal or an organic amine, or an ammonium ion. The composition has a hue and clarity suitable for the ink-jet recording, and can provide a recorded matter which is excellent in light resistance, water resistance and moisture resistance and can be controlled with respect to the degree of the discoloration or fading by the action of ozone. 

Aqueous ink composition, water-soluble dye composition and ink-jet recording method

This invention relates to a polyvinyl alcohol type polarizing film or plate which comprises a water-soluble dye having the formula (1) in a free acid form or a copper complex salt thereof. The said polarizing plate has excellent polarizing performance capability and durability, and is suitably used for the green channel of a liquid crystal projector when B in formula (1) is a benzoylamino group and the water-soluble dye has a wavelength for maximum absorption (&lgr;max) of 520 nm or more and less than 580 nm.

Anthrapyridone compounds, water-based magenta ink composition, and method of ink-jet recording

A black recording having high solubility, being stable even after being stored for long, and capable of forming a printed image with a high optical density and excellent water and light resistances. The recording fluid contains a trisazo compound of general formula (1): wherein D is an 8-hydroxy-1-naphtyl group substituted with one or two sulfo groups; A is a 1,4-phenylene group or 1,4-naphtylene group which may be substituted with amino, hydroxy, alkyl, alkoxy, acylamino or ureido; and B is a phenyl group which may be substituted with hydroxy, amino or sulfo, or a salt thereof and is used for the recording.

Water-soluble trisazo compounds, aqueous ink composition and colored article

Water-soluble disazo compounds, aqueous ink compositions, and colored

Formazan compounds and method of dyeing therewith

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Saitama, Japan

Toru Tabei