Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Tetsujiro Takahashi

Michiei Nakamura

Hitoshi Takeuchi

Shojiro Horiguchi

Minoru Takizawa

Takamitsu Shinoda

Yoshitake Kori

A pigment composition contains a pigment and a dispersant. The dispersant is a polyester compound which contains, per molecule, a residuum of at least two benzene rings coupled together, an aromatic ring having at least 8 carbon atoms or a heterocyclic ring having at least 8 carbon atoms, and at least one ester bond as a principal bond.

Pigment composition

A pigment composition contains a pigment and a dispersant. The dispersant is a phosphoric ester compound represented by the following general formula: ##STR1## wherein at least one of the three Rs is a residuum of a polyester chain containing as principal bonds thereof ester bonds of a polycarboxylic acid and a polyalcohol.

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Koshigaya, Japan

Tetsujiro Takahashi