Preparation of effect pigments coated with metal oxides

Details Preparation of effect pigments coated with metal oxides Preparation of effect pigments coated with metal oxides

1983-10-03

1985-11-12

Cockeram, Herbert S.

Compositions: coating or plastic

Coating or plastic compositions

Carbohydrate or derivative containing

106288B, 106308B, C04B 3126, C04B 3100, C08K 700

Patent

active

045525935

ABSTRACT:
Effect pigments are prepared by a process in which a pigment substrate comprising flaky particles, of which from 10 to 90% by weight have a longest dimension of from 60 to 400 .mu.m and the remainder have a longest dimension of from 3 to 30 .mu.m, are treated, in a fluidized bed, with one or more metal chlorides and steam in the gas phase, at elevated temperatures. During this procedure, the particles are coated with metal oxide. After coating, the fraction having a particle size of from 3 to 30 .mu.m is separated off as the effect pigment.
The coatings obtained adhere very firmly to the flaky particles.
The pigments are used for coloring finishes, plastics, cosmetic products and glasses.

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patent: 3087828 (1963-04-01), Linton
patent: 3342617 (1967-09-01), Jackson
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patent: 4086100 (1978-04-01), Esselborn et al.
patent: 4134776 (1979-01-01), Rieger et al.
patent: 4146403 (1979-03-01), Armanini et al.
patent: 4344987 (1982-08-01), Ostertag et al.

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