To provide a dispersant for an inorganic pigment, by which the variation of viscosity of the inorganic pigment slurry by affection of shearing becomes small and which can also lower a viscosity value, and to provide a pigment-dispersed composition containing the dispersant.
The dispersant for an inorganic pigment contains (A) a salt of a copolymer of an unsaturated monobasic acid and an unsaturated dibasic acid, having 91/9-74/26 constitutional unit ratio of the unsaturated monobasic acid/unsaturated dibasic acid (molar ratio) and 25,000-60,000 weight average molecular weight (Mw), and (B) a salt of a copolymer of an unsaturated monobasic acid and an unsaturated dibasic acid, having 63/37-47/53 constitutional unit ratio of the unsaturated monobasic acid/unsaturated dibasic acid and 25,000-60,000 weight average molecular weight (Mw), by the ratio of (A)/(B)=50/50-96/4 (weight ratio). The pigment-dispersed composition containing the dispersant, is also provided.
| JPH08188986A | 1996-07-23 | |||
| JPS5957913A | 1984-04-03 | |||
| JPS59193964A | 1984-11-02 | |||
| JPS60137429A | 1985-07-22 |
Takahiko Mizobe
Shinji Mochida
Yoshitsune Kazumasa