Michael T. Issel - Emeryville CA Derek W. Bannister - Toms River NJ Shao H. Long - Guangzhou, CN Quilin Wang - Guangzhou, CN Xiang L. Zhong - Guangzhou, CN Guiping Xiao - Guangzhou, CN
Assignee:
Sino-American Pigment Systems, Inc., Inc. - Emeryville CA Guangzhou Hauli Pigment Chemical Industrial Co. - Guangzhou
International Classification:
C09C 104
US Classification:
106423
Abstract:
The invention relates to extended, organic pigments, their method of manufacture and their use in paint formulations, particularly those suitable for road or traffic markings. The subject pigments typically comprise a particulate lithopone core coated with a layer of an organic pigment. According to preferred embodiments, the pigment comprises an azo compound, the pigments are rosinated, and/or the core also contains a colorant or doping material, typically a metal oxide or metal salt. An exemplary method involves mixing particulate lithopone with a coupler such as acetoacet-o-anisidide. A coupler precipitator, typically an acidifier, is then added in an amount sufficient to precipitate the coupler onto the lithopone. The lithopone-bound coupler is then reacted with a diazonium ion in an azo-coupling reaction to form a pigment. The pigment-coated lithopone particles may then be heated and coated with a rosin or modified rosin soap.
Name / Title
Company / Classification
Phones & Addresses
Michael Issel Director
Law Office of Ken Lipson Administrative Management and General Management Consulting
580 California St STE 500, San Francisco, CA 94104 4152833292
Michael Issel (1962-1966), Linda Rusk (1964-1968), Thomas Frye (1980-1984), George Malton (1984-1988), Joseph Zebro (1977-1981), Christina Wolfe (1992-1996)