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

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry and can used in production of pigments for varnishes and paints. Pigment contains shell and core. Shell is made of titanium dioxide. Core is made of a mixture of kaolin, aluminium hydroxide and aluminium oxide with total content of aluminium silicates, aluminium hydroxide and aluminium oxide of not less than 97 %. Weight ratio of total content of aluminium oxide and aluminium hydroxide to content of aluminium silicates ranges from 1:1 to 1:2. Weight content of aluminium hydroxide ranges from 10 to 25 wt% with respect to total weight of core. Weight ratio of shell material to material of core varies from 0.66 to 4 at ratio of core material 2–5 mcm, and shell material from 0.2 to 0.5 mcm.

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

1 cl, 10 ex