Process for producing a surface treated pigment

Details Process for producing a surface treated pigment Process for producing a surface treated pigment

1988-02-03

1989-07-11

Lieberman, Paul

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

427214, 427221, 4274071, 428407, C08J 704, B05D 702

Patent

active

048468932

ABSTRACT:
A process for producing a surface treated pigment wherein pigment particles are dispersed in a solution of a water soluble high polymer having radical generation sites to adsorb the water soluble high polymer on the surfaces of the pigment particles, adding a vinyl monomer to the resulting aqueous liquid dispersion of the pigment particles subjected to the adsorption treatment and polymerizing in the presence of a polymerization initiator, if desired, to form a polymer layer on the surfaces of the pigment particles. Formation of the white polymer particles composed only of polymer can be prevented and dispersion stability can be improved.

REFERENCES:
patent: 3291859 (1966-12-01), Tobolsky
patent: 3945831 (1976-03-01), Satomura
patent: 4127422 (1978-11-01), Guzi, Jr. et al.
patent: 4315959 (1982-02-01), Brandtsbuys et al.
Derwent Abstracts, an 75-11178W/07, "Aqueous Dispersions of Water-Insolo Dyes and Pigment", German Pat. No. DE2336777, 2/6/75.
Derwent Abstracts, AN 86-062537/10, "Reduction of Molecular Weight of Polyacrylic Acids", German Pat. No. DE 3430233, 2/27/86.
Terada and Murashige, (Journal of Colorant Association, vol. 51, pp. 465 to 472 (1978)).
Ohkita et al. (Journal of Colorant Association, vol. 41, p. 187 (1968)).
Furusawa et al. (Kobunshi Ronbunchu, vol. 40, No. 10, pp. 697 to 702 (1983)).

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