Iron oxide black pigments, processes for their preparation and t

Details Iron oxide black pigments, processes for their preparation and t Iron oxide black pigments, processes for their preparation and t

1990-03-23

1991-05-07

Dixon, Jr., William R.

Compositions: coating or plastic

Materials or ingredients

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

423634, 252 6256, C09C 122

Patent

active

050133659

ABSTRACT:
A process is disclosed for preparing iron oxide black pigments obtained by the nitrobenzene reduction process, wherein the iron oxide black is heated to 400.degree.-800.degree. C. in a slightly oxidizing atmosphere with optional milling. The pigments are useful for coloring plastics, coatings and building materials.

REFERENCES:
patent: 4631089 (1986-12-01), Rademachers
Chemical Abstracts, vol. 58, Ref. 4744C, Mar. 4, 1963--"Black iron pigment".

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