Transparent iron oxide pigments

Details Transparent iron oxide pigments Transparent iron oxide pigments

Filed on

1990-02-26

Date issued

1991-04-02

Examiner

Dixon, Jr., William R.

Patent Class

Compositions: coating or plastic

SubClass

Materials or ingredients

SubSubClass

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

Other Related Categories

423633, C09C 122

Type

Patent

Status

active

Patent number

050045040

Description

ABSTRACT:
In accordance with the instant invention red transparent iron oxide pigment is prepared from yellow transparent iron oxide pigment filter cake by drying and calcining in a single operation using a spray dryer employing a nozzle of the two fluid design.

REFERENCES:
patent: 3533820 (1970-10-01), Lewis et al.

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