Color intensive iron oxide black pigments obtained by the nitrob

Details Color intensive iron oxide black pigments obtained by the nitrob Color intensive iron oxide black pigments obtained by the nitrob

1988-12-07

1990-10-30

Lieberman, Paul

Compositions: coating or plastic

Materials or ingredients

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

106460, C09C 124

Patent

active

049666410

ABSTRACT:
Iron oxide black pigment with improved color intensity is produced by subjecting finely divided pigment obtained from reaction of metallic iron with aromatic nitro compounds to a heat treatment of 200.degree. to 800.degree. C. under a non-oxidizing atmosphere for a time of 2 minutes to 5 hours.

REFERENCES:
patent: 4358431 (1982-11-01), Brunn et al.
patent: 4491619 (1985-01-01), Biermann et al.
patent: 4631089 (1986-12-01), Rademachers et al.

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