Rutile-coated mica nacreous pigments and process for the prepara

Details Rutile-coated mica nacreous pigments and process for the prepara Rutile-coated mica nacreous pigments and process for the prepara

1971-08-30

1977-07-26

Douglas, Winston A.

Compositions: coating or plastic

Coating or plastic compositions

Carbohydrate or derivative containing

106300, 106308B, 106309, C09C 100

Patent

active

040380998

ABSTRACT:
Nacreous pigment products comprising mica particles coated with translucent layers consisting essentially of titanium dioxide in the rutile form. A process for the preparation of such pigment products is disclosed, involving treatment with tin compounds, so that the TiO.sub.2 coating will crystallize mainly in the rutile form rather than as anatase during calcination of the pigment. The rutile-coated mica exhibits markedly enhanced light stability as compared with anatase-coated mica pigment products.

REFERENCES:
patent: 2933408 (1960-04-01), Dempster et al.
patent: 3087828 (1963-04-01), Linton
patent: 3331699 (1967-07-01), Marshall
patent: 3861946 (1975-01-01), DeLuca, Jr. et al.

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