Iron oxide pigments with improved color strength

Details Iron oxide pigments with improved color strength Iron oxide pigments with improved color strength

1979-06-29

1981-03-17

Vertiz, O. R.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

106309, C09C 124

Patent

active

042565081

ABSTRACT:
Improved transparent iron oxide pigments having increased color strength are achieved through the incorporation of fluoride with the crystals or particles of the iron oxide. These pigments may be prepared by the process which comprises reacting an aqueous solution of a water-soluble iron salt with an alkaline precipitating agent wherein a fluoride salt is added to the solution or to the reaction product.

REFERENCES:
patent: 1967235 (1934-07-01), Ferkel
patent: 2558302 (1951-06-01), Marcot et al.
patent: 3166430 (1965-01-01), Seabright
patent: 3171753 (1965-03-01), Olby
patent: 3189475 (1965-06-01), Marquis et al.
patent: 3442678 (1969-05-01), Ross
patent: 3946134 (1976-03-01), Sherman

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