Preparation of metal oxide-doped zinc oxide pigments

Details Preparation of metal oxide-doped zinc oxide pigments Preparation of metal oxide-doped zinc oxide pigments

1991-09-19

1993-03-30

Group, Karl

Compositions: coating or plastic

Materials or ingredients

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

106419, 106425, C04B 1400

Patent

active

051980258

ABSTRACT:
Metal oxide-doped zinc oxide pigments are produced by processing an oxide, carbonate, hydroxide of hydroxycarbonate of zinc in the presence of water and an oxide, carbonate, hydroxide, hydroxy-carbonate, oxalate or formate of the doping metal into a paste using formic acid or oxalic acid in an amount which is at least sufficient for converting the oxides, carbonates, hydroxides or hydroxycarbonates mentioned into formates or oxalates, drying, grinding and calcining at from 700.degree. to 1100.degree. C. in an inert gas atmosphere.

REFERENCES:
patent: 2028980 (1936-01-01), Korinth et al.
patent: 2579020 (1951-12-01), Smith
patent: 2887632 (1959-05-01), Dalton
patent: 3264229 (1966-08-01), Klein
patent: 5094693 (1992-03-01), Cordaro et al.

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