Yellow pigments stable at high temperatures

Details Yellow pigments stable at high temperatures Yellow pigments stable at high temperatures

1980-01-25

1981-09-29

Carter, Herbert T.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

252 6263, 106304, 106292, C01G 4100

Patent

active

042922941

ABSTRACT:
A yellow pigment capable of withstanding elevated temperatures such as 200.degree. C. is provided by the formation of a spinel of iron and other metal, such as Mg, Zn, and Sn. The pigment is made by a method which does not involve a step of calcining at high temperature, such as 600.degree. to 1100.degree. C., but rather involves precipitation from aqueous solution and subsequent exposure to elemental oxygen, as by aeration, to form submicron-sized particles of desired spinel.

REFERENCES:
patent: 2904395 (1959-09-01), Downs et al.
patent: 3822210 (1974-07-01), Iwase et al.
patent: 3832455 (1974-08-01), Smith et al.
patent: 3887479 (1975-06-01), McLain
patent: 4075029 (1978-02-01), Nuss
patent: 4097392 (1978-06-01), Goldman et al.
Lih, "Color Technology", Chemical Engineering, Aug. 12, 1968, pp. 146-158.

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