Patent ID: 6825251
Filing Date: 2004-11-30
Classification: C01P,C09C,Y10T

Abstract:
A process for preparing a polymer matrix, said process comprising:(a) combining a dry inorganic pigmentary base and an organo-acid phosphate compound, wherein said inorganic pigmentary base is titanium dioxide and said organo-acid phosphate compound has the formula: (Râ€”O)xPO(OH)y wherein x=1 or 2; y=3âˆ’x, and R is an organic group having from 2 to 22 carbon atoms, to form a treated pigment; (b) micronizing the treated pigment; and (c) after said micronizing, combining the treated pigment with a polymer to form a polymer matrix, wherein said polymer matrix has an essential absence of water and an essential absence of organic solvents.