Toyo Ink Mfg. Co., Ltd.

Toyo Ink Co., Ltd.

Artience Co., Ltd.

Tetsuya Sai

Takashi Kamikubo

Daisuke Tanabe

Naohiro Hamada

Yuika Hayasaka

Hideki Yasuda

Tomoe Yamagami

Riho Hayama

A pigment dispersant represented by the following general formula (1) is provided: wherein R, R, R, R, R, R, R, R, Rand Reach independently is &#x2014;H, &#x2014;Cl, &#x2014;CH, &#x2014;CF, &#x2014;NO, &#x2014;COOCH(CH)or &#x2014;COOCHCHCl; R, R, Rand Reach independently is &#x2014;H, &#x2014;Cl, &#x2014;CHor &#x2014;CN; M is one equivalent of a bivalent or trivalent metal; and n is an integer of 1 to 3.

Pigment dispersant, and pigment composition, pigment dispersion and printing ink using the same

A pigment dispersing agent of the formula (1) capable of providing a printing ink or a coating composition excellent in fluidity and dispersion stability and a dry coating excellent in gloss, a pigment composition containing the same and a pigment dispersion containing the same,  wherein Xis &#x2014;NH&#x2014;, &#x2014;O&#x2014;, &#x2014;CONH&#x2014;, &#x2014;SONH&#x2014;, &#x2014;CHNH&#x2014;, &#x2014;CHNHCOCHNH&#x2014; or &#x2014;X&#x2014;Y&#x2014;X&#x2014;, Xand Xare &#x2014;NH&#x2014; or &#x2014;O&#x2014;, Xis &#x2014;CONH&#x2014;, &#x2014;SONH&#x2014;, &#x2014;CHNH&#x2014;, &#x2014;NHCO&#x2014; or &#x2014;NHSO&#x2014;, Y is an alkylene group, an alkenylene group or an arylene group, Z is &#x2014;SOM or &#x2014;COOM, Ris a heterocyclic ring residue or an aromatic ring residue, Q is &#x2014;O&#x2014;R, &#x2014;NH&#x2014;R, a halogen group, &#x2014;X&#x2014;Ror &#x2014;X&#x2014;Y-Z, Ris a hydrogen atom, an alkyl group or an alkenyl group, and M is one equivalent of a monovalent to trivalent cation.

Pigment dispersing agent, pigment composition containing the same and pigment dispersion containing the same

Growing community of inventors

Tokyo, Japan

Tetsuya Sai