Process for producing durable titanium dioxide pigment

Details Process for producing durable titanium dioxide pigment Process for producing durable titanium dioxide pigment

1990-08-20

1991-08-20

Dixon, Jr., William R.

Compositions: coating or plastic

Materials or ingredients

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

106442, 106400, 106401, C09C 136

Patent

active

050411624

ABSTRACT:
An improved process is provided for preparing durable titanium dioxide pigments having discrete layers of silica and alumina deposited thereon. The improved process includes careful control of the operating conditions of pH end temperature of a slurry of titanium dioxide pigment during the addition of the coating materials to the slurry and the deposition of the silica and alumina onto the pigment.

REFERENCES:
patent: Re27818 (1973-11-01), Werner
patent: 3876442 (1975-04-01), Thomas
patent: 3928057 (1975-12-01), DeColibus
patent: 3954496 (1976-05-01), Batzar
patent: 4075031 (1978-02-01), Allen
patent: 4125412 (1978-11-01), West
patent: 4199370 (1980-04-01), Brand

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