METHOD FOR PRODUCING PIGMENTS Russian patent published in 1997 - IPC

FIELD: chemical industry, pigment production. SUBSTANCE: particulate filler, such as calcium chemicals or ground natural minerals, is ground in planetary-type grinding mill under effect of centrifugal force, at acceleration 20-55 g for 15 minutes, whereafter filler thus-ground is subjected to identical treatment with admixture of dyeing components at weight ratio 80-85 : 15-20. For instance, using 80 wt.% synthetic calcium silicate and 20 wt.% titanium dioxide pigment is produced having following parameters: hiding power 44.9 g/sq.m, oil absorption 20 g/100 g pigment and whiteness degree 97.5%. EFFECT: finely dispersed pigment is produced. 3 cl, 2 tbl