Transparent iron oxide pigments

Details Transparent iron oxide pigments Transparent iron oxide pigments

1984-10-04

1986-10-21

Yarbrough, Amelia B.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106309, 423140, C08K 320

Patent

active

046183752

ABSTRACT:
The present invention relates to a process for preparing transparent iron oxide pigments comprising reacting an iron compound, an ammonia releasing compound and water in a non-aqueous solvent in which both the iron compound and the ammonia-releasing compound have appreciable solubility. The reaction is performed by refluxing this composition. Where a red pigment is desired, a high boiling alcohol may be employed whereby the refluxing is carried out above 200.degree. C. which thus converts the pigment to a red iron oxide pigment during the reflux step. In order to get a metallic finish, aluminum flake pigment may be added to a mixture of the iron compound and solvent prior to addition of the ammonia-releasing salt.

REFERENCES:
patent: 4414033 (1983-11-01), Patil et al.
Derwent Abstract, Accession No. 83-31187k/13, Japanese Pat. No. J58029863, Feb. 22, 1983.

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