Heat-stable zinc ferrite colour pigments, process for...

Details Heat-stable zinc ferrite colour pigments, process for... Heat-stable zinc ferrite colour pigments, process for...

2007-11-13

2007-11-13

Lorengo, J. A. (Department: 1755)

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

C106S419000

Reexamination Certificate

active

10970249

ABSTRACT:
The present invention relates to zinc ferrite colour pigments, including a process for preparing and using them and, more particularly, the present invention relates to light-coloured zinc ferrite colour pigments having enhanced thermal stability, a magnesium content of from 0.01%-0.4% by weight, a color difference ΔE* according to DIN 53 772 at 260° C. of <3.0, a color difference ΔE* according to DIN 53 772 at 300° C. of <5.0, and a lightness of L*, measured in PE-HD full shade according to DIN 55 772 of >52.5.

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T.C. Patton in Pigment Handbook, vol. 1, Properties and Economics, pp. 347-348, John Wiley and Sons, New York 1973.
A. Kalendova, et al, “Anticorrosive Pigments for Chemically and Thermally Resistant Coatings”, Macromol. Symp., Bd. 187, 2002, Seiten 97-107, XP001204358, Seite 102.

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