Inventors:
Hans Rasmusen - Hvalso, DK
Jorn Thorsson - Virum, DK
James Moore - Cincinnati OH, US
Charles Perry - Boiling Springs SC, US
Joseph LaBazzo - Mason OH, US
International Classification:
C08L095/00, C04B016/00, C04B024/00, C04B014/00, C09C001/22, C09C001/44, C08K005/48, C08K003/18
US Classification:
524088000, 106499000, 106493000, 106498000, 106476000, 106460000, 106479000, 106480000, 106712000, 106281100, 524430000
Abstract:
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 mixer filled with ceramic, metal or glass beads for 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.