Leafing aluminum pigments of improved quality
OwnerTom Kondisinventor
Life of this patent
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Abstract
Aluminum pigments are produced by wet milling in the presence of water, employing a coupling agent to allow miscibility of water in the milling slurry, in order to compensate for inefficient aeration of commercial ball mills. Hydrogen peroxide may be employed to the same purpose without a coupling agent. This process assures the production of high quality leafing aluminum pigments.
Claims20
A process for producing leafing pigments which comprises milling aluminum particles in the presence of a liquid hydrocarbon, a milling lubricant, a coupling agent and water.
A process for producing leafing pigments which comprises milling aluminum particles in the presence of a liquid hydrocarbon, a milling lubricant and hydrogen peroxide.
The method of producing leafing-quality aluminum pigment which comprises, in a ball mill of such substantial size as to yield a poor product because of oxygen starvation, the step of milling together, in appropriate proportions, a mixture of aluminum pieces, long-chain organic acid, liquid hydrocarbon, and mixture of water plus coupling agent, said milling operation being one which comminutes the aluminum particles and generates new surfaces of aluminum.
In the method of producing leafing-quality aluminum pigment in a ball mill of such substantial size as to yield a poor product because of oxygen starvation, the step of
- milling together, in appropriate proportions, a mixture of aluminum pieces, long-chain organic acid, liquid hydrocarbon, and aqueous hydrogen peroxide, said milling operation being one which comminutes the aluminum particles and generates new surfaces of aluminum.
Dependencies are inferred from the claim text.