Spinel black pigments based on copper-chromium-manganese mixed o

Details Spinel black pigments based on copper-chromium-manganese mixed o Spinel black pigments based on copper-chromium-manganese mixed o

1992-11-20

1993-10-05

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

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

106480, C09C 134

Patent

active

052501124

ABSTRACT:
Spinel black pigments are prepared by annealing oxides, hydroxides or carbonates of copper, chromium and manganese and grinding the product. The manganese-yielding component is Mn.sub.3 O.sub.4.

REFERENCES:
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patent: 4205996 (1980-06-01), Eppler
patent: 5080718 (1992-01-01), Sullivan et al.
Ullmanns Encyklopadie der technischen Chemi, Verlag Chemie, Weinheim 1979, 4th Edition, vol. 18, pp. 607-608.
P. A. Lewis, Pigment Handbook, John Wiley & Sons, New York 1988. 2nd Edition, vol. 1, pp. 777-784.
Gmelins Handbuch der anorganischen Chemie, Verlag Chemie, Weinheim 1973, 8th Edition, vol. 56, Part C1, p. 77.
DIN 55 986; Testing of pigments: determination of relative tinting strength and colour difference after colour reduction; colorimetric method 1983.
DIN 66 131; Determination of specific surface area of solids by gas adsorption using the method of Brunauer, Emmett and Teller (BET); fundamentals, 1973.
DIN 5033; Colorimetry; basic concepts, 1979.
DIN 6174; Colorimetric evaluation of colour differences of surface colours according to the CIELAB formula, 1979.
ISO/DIS 10527; CIE Standard colorimetric observers, 1989.
ISO/7724/1; Paints and varnishes--Colorimetry--Part 1: Principles, First Edition, 1984.
ISO/7724/2; Paints and varnishes--Colorimetry--Part 2: Colour measurement, First Edition, 1984.
ISO/7724/3; Paints and varnishes--Colorimetry--Part 3: Calculation of colour differences, First Edition, 1984.

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