WHITE PIGMENT Russian patent published in 2017 - IPC C09C1/36 C09D7/12 C01B33/26 C01F7/02 B01J13/02 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry and can be used for making pigments for varnishes and paints. Pigment consists of shell and core. Shell is made of titanium dioxide. Core is made of a mixture of kaolin and aluminium hydroxide with total weight content of aluminium silicates aluminium hydroxide not less than 98 %. Weight ratio of aluminium hydroxide to weight of core varies from 10 to 25 pts.wt. Weight ratio of shell material to core material is 0.66–2.33 at fractional composition of core material from 2 to 5 mcm and shell material from 0.2 to 0.5 mcm.

EFFECT: invention improves quality of pigment, increases resistance to destruction in operating conditions at acidic precipitation, storage and transportation.

1 cl, 8 ex