Iron blue pigment, process for making the same and use

Details Iron blue pigment, process for making the same and use Iron blue pigment, process for making the same and use

1981-10-06

1983-04-05

Morris, Theodore

Compositions: coating or plastic

Coating or plastic compositions

Contains fireproofing or biocidal agent

106 22, 106171, 106304, 423367, C09D 1100, C01C 312

Patent

active

043789951

ABSTRACT:
Iron blue pigment (DIN 55 906) is produced by white paste precipitation and subsequent oxidation of the white paste. Alakli or alkali metal ions i.e. sodium and potassium ions, cyanide or complex iron cyanide ions and iron ions are used as raw materials. The iron blue pigment according to the invention is characterized by a potassium content of 0.5-4.5% by weight, preferably 0.5-2.0% by weight, a sodium content of 0.2-1.0% by weight, an ammonium content of 2.0-4.5% by weight, preferably 3.0-4.5% by weight, a coloring power in accordance with DIN 53 204 and DIN 53 234 of 5-15% above the Vossen Blue 705 Standard and the following color intervals (determined in accordance with DIN 53 204 and DIN 53 234 in conjunction with DIN 6174, in relation to Vossen Blue 705 as standard):

REFERENCES:
patent: 3985571 (1976-10-01), Reinhardt et al.
patent: 4046861 (1977-09-01), Reinhardt et al.

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