Process for preparing colored aluminum powder

Details Process for preparing colored aluminum powder Process for preparing colored aluminum powder

1978-02-21

1979-06-12

Silverberg, Sam

Coating processes

Particles, flakes, or granules coated or encapsulated

Applying superposed diverse coatings or coating a coated base

427216, 106308B, 106290, 106288B, C09C 100

Patent

active

041580745

ABSTRACT:
Colored aluminum powder is prepared by immersing finely divided aluminum in a weak alkali solution maintained at a temperature of 50.degree. C. to the boiling point of the solution and having a pH of 8 to 12, said solution containing a salt of iron, nickel, cobalt, zinc or copper, and at least one aliphatic amine having a chelating ability for the metal salt, to form a composite film which consists of a hydrated aluminum oxide and a hydrated oxide of the metal, and separating the aluminum from the solution.

REFERENCES:
patent: 2008733 (1935-07-01), Tosterud
patent: 3007052 (1962-12-01), Frieser
patent: 3152970 (1964-10-01), Jensen
patent: 3545994 (1970-12-01), Lott
patent: 3825438 (1974-07-01), Pritchard et al.
patent: 4045599 (1977-08-01), Ramaley

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