Nacreous pigments having improved light-fastness, a process...

Details Nacreous pigments having improved light-fastness, a process... Nacreous pigments having improved light-fastness, a process...

C - Chemistry, Metallurgy

09

C

6/208

C09C 1/00 (2006.01) C09C 1/36 (2006.01)

Patent

CA 1184003

"NACREOUS PIGMENTS HAVING IMPROVED LIGHT-FASTNESS, A PROCESS FOR THEIR PREPARATION, AND THEIR USE" ABSTRACT OF THE DISCLOSURE Nacreous pigments having a yellow powder color and an improved light-fastness comprise a mica platelet coated with titanium dioxide and on the titanium dioxide layer, a thin layer of calcined chromium oxide and/or chromium phosphate as a protective layer. The pigments are produced by coating mica platelets coated with metal oxides and/or hydroxides, with a thin layer of a sparingly soluble chromium(III) compound and calcining at about 500 - 1000° C.

411906

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