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:
Feb. 28, 1978
Filed:
Dec. 10, 1976
Horst Bernhard, Darmstadt, DT;
Reiner Esselborn, Darmstadt, DT;
Merck Patent Gesellschaft mit beschrankter Haftung, Darmstadt, DT;
Abstract
A process for the preparation of carbon black-containing pigments consists essentially of precipitation of a carbon black-containing metal hydroxide or bismuth oxychloride layer on substrate particles in an aqueous suspension containing carbon black particles of particle size of below 1 mn. and washing, drying and optionally calcining the products. Flaky substrates, e.g., mica flakes coated with TiO.sub.2, are preferably employed. Carbon black-containing pigments obtained have carbon black particles incorporated in a metal hydroxide, metal oxide or bismuth oxychloride layer precipitated on the substrate in the presence of the carbon black.