Green nacreous pigments having calcined Cr oxide and phosphate l

Details Green nacreous pigments having calcined Cr oxide and phosphate l Green nacreous pigments having calcined Cr oxide and phosphate l

1982-09-22

1984-07-03

McCarthy, Helen M.

Compositions: coating or plastic

Coating or plastic compositions

Carbohydrate or derivative containing

106302, 106308B, 424 63, C09C 100

Patent

active

044577842

ABSTRACT:
Nacreous pigments comprise a mica platelet coated with a first layer of a metal oxide and a second layer of chromium(III) oxide, wherein the chromium oxide layer further contains at least 0.05 mol % of phosphate ion based on the number of moles of chromium ion therein. Because of the phosphate ion, the chromium layer is continuous and essentially crack-free even at larger thicknesses, and contributes to the interference effect. The pigments are particularly useful as lustrous agents in cosmetics.

REFERENCES:
patent: 3087828 (1963-04-01), Linton
patent: 3087829 (1963-04-01), Linton
patent: 3127280 (1964-03-01), Whatley
patent: 3342617 (1967-09-01), Jackson
patent: 3650790 (1972-03-01), Klenke et al.
patent: 3832208 (1974-07-01), Jackson
patent: 3926659 (1975-12-01), Bernhard et al.
patent: 4134776 (1979-01-01), Rieger et al.
patent: 4192691 (1980-03-01), Armanini

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