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:
Apr. 09, 1985
Filed:
Dec. 27, 1982
Applicant:
Inventor:
Horst Bernhard, Schwarzenberg, AT;
Assignee:
Merck Patent Gesellschaft mit beschraHaftung, Darmstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; C04B / ; C09C / ; C09C / ;
U.S. Cl.
CPC ...
1063 / ; 1063 / ; 1063 / ; 106291 ; 427215 ; 428363 ; 428404 ;
Abstract
Nacreous pigments having improved light fastness are based on mica flakes coated with metal oxides, wherein the metal oxide layer is formed as a homogeneous mixed layer in which, in addition to titanium dioxide, silicon dioxide and iron oxide are also present. To produce these pigments, mica is coated in an aqueous suspension by coprecipitation of a titanium dioxide hydrate, iron hydroxide and silicon dioxide to form a uniform layer. The flakes are then washed, dried and calcined. The pigments can be used for the pigmenting of plastics, lacquers, paints and toiletries.