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US 5,470,385 AGranted
Water resistant metal pigment particles
AssigneeSilberline Manufacturing Co., Inc.
InventorsCraig B. Keemer, William G. Jenkins, H. Taylor Lamborn, Joseph B. Scheller
Life of this patent
Estimating the term…
Abstract
Metal pigment particles treated with an organic phosphate or a pentavalent vanadium compound and a nitro-containing compound show increased stability against attack by water. The particles are especially useful in aqueous coating compositions. The nitro-containing compound also may be included in the vehicle of the coating composition separately from the paste of metal pigment particles.
Claims19
An aqueous coating composition comprising:
- metal pigment paste which comprises metal pigment particles and a member selected from the group consisting of an organic phosphate, an organic phosphite and a pentavalent vanadium compound;
- an alkyl or aryl compound having 1 to 20 carbon atoms or a halo or amino substituted alkyl or aryl compound having 1 to 20 carbon atoms and wherein said compound contains a nitro functional group and
- an aqueous carrier.
A method of making a coating composition, comprising:
- adding a solvent comprising an alkyl or aryl compound having 1 to 20 carbon atoms or a halo or amino substituted alkyl or aryl compound having 1 to 20 carbon atoms and wherein said compound contains a nitro functional group to a vehicle suitable for forming a coating composition;
- and
- adding to the vehicle containing said solvent a paste comprising metal pigment particles which have been treated with at least one of an organic phosphate, an organic phosphite or a pentavanadium compound.
Dependencies are inferred from the claim text.