Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1992-11-16
1994-04-12
Bell, Mark L.
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106415, 106472, 106474, C09C 144
Patent
active
053021991
ABSTRACT:
The invention is interference pigments having improved covering power and high luster based on platelet-shaped substrates which, if desired, are coated with one or more films comprising one or more metal oxides and are obtainable by adding an aqueous carbon black dispersion and a solution of one or more metal salts to an aqueous suspension of the substrate at a pH suitable for hydrolysis of a film comprising the metal oxide(s) or hydroxide(s) and containing carbon black, in which the product obtained, after being separated off and, if desired, after washing and drying, is ignited at 700.degree.-900.degree. C. in an oxygen-containing atmosphere, during which carbon oxides escape.
REFERENCES:
patent: 3087827 (1963-04-01), Klenke, Jr. et al.
patent: 3107173 (1963-10-01), Klenke
patent: 4076551 (1978-02-01), Bernhard et al.
Bernhardt Klaus
Prengel Constanze
Bell Mark L.
Merck Patent Gesellschaft mit beschrankter Haftung
Thompson Willie J.
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