The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 1982
Filed:
Oct. 03, 1980
Klaus Hestermann, Erftstadt, DE;
Alexander Maurer, Hurth-Knapsack, DE;
Joachim Kandler, Erftstadt, DE;
Gerhard Mietens, Hurth-Knapsack, DE;
Herbert Beumling, Bergisch-Gladbach, DE;
Hoechst Aktiengesellschaft, , DE;
Abstract
The invention relates to a corrosion-inhibiting active pigment for use in the surface protection of iron and iron alloys. The pigment consists of a mixture of calcium hydrogen phosphate dihydrate, magnesium hydrogen phosphate trihydrate and zinc oxide. More specifically, the mixture contains 2 to 98 weight % of ZnO and 98 to 2 weight % of phosphate components. These in turn contain 3 to 97 weight % of CaHPO.sub.4 .multidot.2 H.sub.2 O and 97 to 3 weight % of MgHPO.sub.4 .multidot.3 H.sub.2 O. The active pigment is suitable for use in painting compositions or lacquers.