Patent ID: 6540823
Filing Date: 2003-04-01
Classification: C01G,C01P

Abstract:
A process for preparing a flake inorganic pigment coated with zinc magnesium titanate defined by the following formula:Zn2âˆ’xMgx.yTiO4â€ƒâ€ƒ(I) in whichx denotes a real number of 0.5 to 1.5; and y denotes an integer of 1 or 2 said process comprising the steps of dispersing a flake inorganic pigment in an aqueous phase, and dissolving water-soluble salts of titanium, zinc and magnesium in the aqueous phase according to the constitutional ratio given in the formula (I) and heating the resulting mixture to a temperature in the range of 40Â° C. to 80Â° C., titrating the mixture with an alkali, filtering the mixture, washing the mixture with water, drying the mixture, and sintering the mixture at a temperature in the range of from 700Â° C. to 1300Â° C.