Iron oxide black pigment granules, processes for their preparati

Details Iron oxide black pigment granules, processes for their preparati Iron oxide black pigment granules, processes for their preparati

1990-03-26

1991-03-26

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

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

423634, 252 6256, C09C 300

Patent

active

050026097

ABSTRACT:
A process is disclosed for preparing dispersant-free iron oxide pigment granules by spraying or atomizing an iron oxide black pigment suspension and heating the resulting granules at a temperature of 400.degree.-800.degree. C. The granules are useful for coloring building materials such as concrete.

REFERENCES:
patent: 3843380 (1974-10-01), Beyn et al.
patent: 4261966 (1981-04-01), Portes

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