| abstract |
PURPOSE: To obtain a cationic fixed pigment dispersoid having a high solid content, a low viscosity and good adsorptivity to negative charge paper fibers by adding a pigment component such as calcium sulfate, a specific dispersant, and a specific polymer as a protective colloid. n CONSTITUTION: This dispersoid is obtained by adding (B) a cationic polymer or a quaternary ammonium compound as a dispersant and/or (C) a cationic polymer obtained from hydrophilic poly(meth)acrylate, degraded (modified) starch, degraded (modified) galactomannan, (hydroxy)methylcellulose, carboxymethylcellulose, degraded alginate, proteins and/or PVA as a protective colloid for coating a component A to (A) a pigment component containing calcium sulfate, talc and/or aluminum hydroxide. n COPYRIGHT: (C)1989,JPO |