METHOD OF MAKING IRON PHOSPHATE-CONTAINING PIGMENT Russian patent published in 2010 - IPC C09C1/22 

FIELD: chemistry.

SUBSTANCE: invention can be used to make an anticorrosion pigment which contains iron phosphate. The method of making the pigment involves addition of phosphoric acid to an iron salt solution, treatment of the mixture of solutions with ammonia, filtration, washing and drying. The iron alt used is FeSO₄ and the mixture of solutions is treated with ammonia to pH=3.5-8.

EFFECT: invention enables to obtain an anticorrosion pigment with grey, blue and green colour, reduction of pigment opaqueness to 19-64 g/m² and up to 25-69 g/100 g increase in oil consumption.

4 cl, 1 tbl, 6 ex