Chalking-resistant titanium dioxide pigment

Details Chalking-resistant titanium dioxide pigment Chalking-resistant titanium dioxide pigment

1976-05-05

1977-12-13

Douglas, Winston A.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106308M, 106309, C09C 136

Patent

active

040626920

ABSTRACT:
A chalking-resistant titanium dioxide pigment is produced by mixing the pigment with a vinyl polymer, in form of an aqueous latex, applying the polymer to the pigment in quantities of about 0.1 to 30% by weight based on the final pigment and the mixture containing at least about 30% of water by weight. The polymer is then coagulated, the aqueous phase separated and the pigment-plus-polymer dried. Due to some apparent complexing, the polymer cannot be quantitatively dissolved away from the pigment. The pigment produces chalking-resistant lacquers, paints and coating compositions.

REFERENCES:
patent: 3133893 (1964-05-01), Newman
patent: 3393165 (1968-07-01), Evans et al.
patent: 3563932 (1971-02-01), Varnazy et al.

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