Mitsui Chemicals, Inc.

Mitsui Toatsu Chemicals, Incorporated

Jotaro Kida

Yoshimitsu Tanabe

Masakatsu Nakatsuka

Kiyoharu Hasegawa

Masayuki Furuya

Takeshi Nishimura

Nobuhiro Takizawa

A color developer composition comprising (A) a color developer containing a polyvalent metal salt of a salicylic acid derivative, and (B) a polyester polyol having in the molecule skeleton at least one carbonate bond or ester bond, and a derivative thereof, an aqueous dispersion and a color developing ink using this color developer composition, and a recording sheet having a layer containing this color developer composition on a base material.

Color developer composition, aqueous dispersion, recording sheet and color developing ink

A process for preparing a polyvalent metal salt of a salicylic acid resin which comprises the steps of reacting salicylic acid or its derivative with styrene or its derivative at a temperature of -20.degree. C. or higher but lower than 40.degree. C. in the presence of sulfuric acid, and then reacting the resulting reaction product with a polyvalent metal compound; an aqueous dispersion in which the polyvalent metal salt of the resin is dispersed in water; and a developing sheet in which the polyvalent metal salt of the salicylic acid resin is used.

Polyvalent metal salt of salicyclic acid resin and process for preparing

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Chiba, Japan

Jotaro Kida