PIGMENT DISPERSION Russian patent published in 2012 - IPC C09C1/30 C09D7/12 C09D17/00 

FIELD: chemistry.

SUBSTANCE: described is a method of producing an essentially aqueous pigment dispersion which is essentially free from organic binder and dispersions obtained using said method. The method involves mixing a water-soluble or water-dispersable silane compound and particles of colloidal silicon dioxide with weight ratio of silane to silicon dioxide from 0.25 to 1.5 to form particles of silanised colloidal silicon dioxide in an aqueous dispersion. Said particles of colloidal silicon dioxide are further mixed with an organic and/or inorganic pigment with weight ratio of silicon dioxide to pigment from about 0.001 to about 0.8, to form said essentially aqueous pigment dispersion. Described also is use of the disclosed pigment dispersion when applying coatings and for reducing formation of bubbles on non-absorbent substrates.

EFFECT: disclosed pigment dispersion has high resistance to flocculation and high stability over time.

20 cl, 5 tbl, 13 ex