Process for preparing stable inorganic pigment

Details Process for preparing stable inorganic pigment Process for preparing stable inorganic pigment

1979-12-31

1982-06-15

McCarthy, Helen M.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106288B, 106308B, 106309, C09C 100

Patent

active

043349331

ABSTRACT:
A process for preparing a stable inorganic pigment coated with a fine amorphous silica which comprises forming a silica sol in an aqueous prepared slurry of an inorganic pigment by reacting an alkali silicate solution with one or more acid gases so that a fine silica sol covers the surfaces of the particles of the inorganic pigment.

REFERENCES:
patent: 2296638 (1942-09-01), Hanahan
patent: 2731326 (1956-01-01), Alexander et al.
patent: 2913419 (1959-11-01), Alexander
patent: 3337299 (1967-08-01), Burke
patent: 3454513 (1969-07-01), Azarian
patent: 3639133 (1972-02-01), Linton
patent: 3954496 (1976-05-01), Batzar
patent: 4082905 (1978-04-01), Stephan et al.
patent: 4132560 (1979-01-01), Marquisee et al.
patent: 4158074 (1979-06-01), Uchiyama et al.
Iler, R. K.-The Colloid Chemistry of Silica and Silicates"-(1955) pub. by Cornell Univ., N.Y. pp. 91-92.

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