Process for coating pigment particles with organic polymers

Details Process for coating pigment particles with organic polymers Process for coating pigment particles with organic polymers

C - Chemistry, Metallurgy

09

C

117/48.1

C09C 1/36 (2006.01) C08F 2/44 (2006.01) C08F 292/00 (2006.01)

Patent

CA 1051284

PROCESS FOR COATING PIGMENT PARTICLES WITH ORGANIC POLYMERS ABSTRACT OF THE DISCLOSURE Dispersed solid particles of titanium dioxide pigment in water containing a dispersing agent are treated with an anchoring agent which is adsorbed on the pigment surface and is capable of copolymerization with other vinyl monomers. The desired monomer or mixture of monomers is added with a polymerization catalyst and heated to effect polymerization. Among the monomers employed are the acrylates, methacrylates, styrene, acrylonitrile, and vinyl sulfonate. The process provides for the coating of individual pigment particles with- out the undesirable coating of pigment agglomerates. Pigments coated by the process exhibit good dispersion and wetting properties when incorporated in vehicles such as paints and plastics.

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