Pigment preparations From CIBA Specialty chemicals
Patent No. U.S. 6,800,127 B2
Ciba Specialty Chemicals Corporation has received a patent for a pigment preparation comprising from 55 to 99 parts by weight of polyamide particles having an average particle size below 50 mm and one to 45 parts by weight of a pigment absorbed on or therein, wherein the parts by weight of the polyamide particles and pigment total 100 parts by weight and wherein the polyamide particles and pigment are combined by a wet blending process in a liquid media.