The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 16, 2011
Filed:
May. 12, 2010
Hans Rasmusen, Hvalso, DK;
Jorn R. Thorsson, Virum, DK;
James E. Moore, Cincinnati, OH (US);
Charles W. Perry, Boiling Springs, SC (US);
Joseph Labazzo, Sr., Mason, OH (US);
Hans Rasmusen, Hvalso, DK;
Jorn R. Thorsson, Virum, DK;
James E. Moore, Cincinnati, OH (US);
Charles W. Perry, Boiling Springs, SC (US);
Joseph LaBazzo, Sr., Mason, OH (US);
Sun Chemical Corporation, Parsippany, NJ (US);
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.