Dic Corporation

Nissin Chemical Industry Co., Ltd.

Seiko Pmc Corporation

Kenji Nasu

Shinichi Okada

Yoshinosuke Shimamura

Yasuhiro Mitta

Hiroyuki Buei

Shiro Umeuchi

Takashi Yoshinari

The invention provides a cationic emulsion having a polymer core-shell structure that exhibits excellent substrate adhesiveness, water resistance, alcohol resistance, and high gloss when used in an aqueous ink, and exhibits excellent color developing properties and water resistance when used in a recording medium, specifically, a cationic emulsion having a polymer core-shell structure comprising component (A) and component (B) and having a mass ratio of component (A):component (B) of 25:75-75:25. 

Cationic emulsion having polymer core-shell structure, aqueous ink, and recording medium

A resin for aqueous pigment dispersion that allows the production of an aqueous pigment dispersion for ink jet recording that contains only a few coarse particles and has excellent ejection stability, an aqueous pigment dispersion containing the resin for aqueous pigment dispersion, an ink jet recording ink, and a method for producing an aqueous pigment dispersion. A resin for aqueous pigment dispersion produced by copolymerization of a composition that contains (a) one or two or more compounds selected from the group consisting of alkenylsuccinic acids, alkenylsuccinic anhydrides, alkylsuccinic acids, and alkylsuccinic anhydrides, and (b) a styrene monomer, wherein the (a) component constitutes 5% by mass or more and the (b) component constitutes 30% by mass or more of the total amount of all the monomer component(s) and the (a) component of the composition.

Resin for aqueous pigment dispersion, aqueous pigment dispersion, ink jet recording ink, and method for producing aqueous pigment dispersion

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Akashi, Japan

Kenji Nasu