
US Patent No: 5,972,098
Number of patents in Portfolio can not be more than 2000
Titanate-containing pearlescent pigments
Stats
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Oct 26, 1999
Issued date -
Jan 9, 1998
filing date -
08/983,347
serial no -
Expired
status
Importance
Abstract
Single-layer or multilayer titanate-containing pearlescent pigments comprising iron titanate and, if appropriate, titanium oxide and/or iron oxide, which is obtainable by solidification of an aqueous solution of a thermally hydrolysable titanium compound on a continuous belt, detachment of the layer formed, coating of the resulting titanium dioxide platelets, after or without intermediate drying, with iron oxide in a wet process, and drying and calcining of the resulting material in an oxidizing or reducing gas atmosphere at not less than 500.degree. C., the layer thicknesses of the titanium dioxide layer and iron dioxide layer being adjusted such that either the stoichiometric ratio between iron oxide and titanium dioxide necessary for the formation of pseudo-brookite or ilmenite is obtained or an excess of iron oxide or titanium dioxide is present.
First Claim
Related Publications
International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,744,832 Iron oxide coated perlescent pigments | 28 | 1986 | |
| 5,009,711 Golden color luster pigments | 17 | 1988 | |
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| 4,344,987 Preparation of flaky mica pigments coated with metal oxides, and use of these pigments | 33 | 1981 | |