摘要 |
A cationic dispersion which includes at least one pigment, water, and at least one quaternary salt of a styrene maleimide imide resin in an amount effective to disperse the organic pigment. A method for preparing the cationic dispersion includes (i) mixing, at 500 to 10,000 rpm, at least one pigment; water; and either (a) at least one a quaternary salt of a styrene maleimide imide resin or (b) at least one styrene maleimide imide resin in combination with at least one weak acid, thereby forming a dispersion premix; (ii) milling the dispersion premix in a mixter filled with ceramic, metal or glass beads or a period of time sufficient to reduce pigment agglomerates to primary particles, thereby forming a non-standardized dispersion; and (iii) standardizing the dispersion against a color standard by adding water. The resulting cationic dispersion exhibits good alkali resistance and lightfastness, and can be used to integrally color concrete and other building materials.
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申请人 |
SUN CHEMICAL CORPORATION;RASMUSEN, HANS;THORSSON, JORN, R.;MOORE, JAMES, E.;PERRY, CHARLES, W.;LABAZZO, JOSEPH, P. |
发明人 |
RASMUSEN, HANS;THORSSON, JORN, R.;MOORE, JAMES, E.;PERRY, CHARLES, W.;LABAZZO, JOSEPH, P. |