Polymer-modified particulate titanium dioxide

Details Polymer-modified particulate titanium dioxide Polymer-modified particulate titanium dioxide

C - Chemistry, Metallurgy

09

C

C09C 1/36 (2006.01) C08J 3/215 (2006.01) C09C 1/00 (2006.01) C09C 3/10 (2006.01) C09D 5/02 (2006.01) C09D 7/14 (2006.01) C09D 17/00 (2006.01)

Patent

CA 2085779

PAI 36702 ABSTRACT POLYMER-MODIFIED PARTICULATE TITANIUM DIOXIDE The tendency for hard and irregular particles of titanium dioxide pigment to adversely affect the sheen and coin mar resistance of a dried coating into which they have been incorporated is reduced by modifying the particles with polymer particles which have been preformed and are therefore of a more pre-determinable shape and size. The polymer particles are chemically bonded to a polymeric water-soluble compound containing moieties which are adsorbable onto the titanium dioxide particles so that on mixing a colloidally stabilised aqueous dispersion of the polymer particles with a colloidally stabilised aqueous dispersion of titanium dioxide particles, the moieties adsorb onto the titanium dioxide to form a colloidally stable aqueous dispersion of polymer-modified titanium dioxide which is useful in coating compositions.

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