Method of stabilizing metal pigments against gassing
AssigneePPG Industries Ohio, Inc.
InventorsCathy A. Taylor, Daniel Rardon, Paul Lamers, Kapiappa G. Ragunathan, Shanti Swarup, Michael Hart
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Abstract
The present invention is directed to a passivating material suitable for passivating a metal surface. The passivating material comprises a polymer which comprises (a) at least one nitro group, and/or pyridine group, and/or phenolic hydroxyl group; and (b) at least one group selected from a phosphorous-containing group and/or a carboxylic acid group, wherein the at least one phosphorous-containing group is selected from a phosphate, a phosphite, or a non-nitrogen substituted phosphonate.
Claims12
A passivating material suitable for passivating a metal surface, the passivating material comprising:
- a polymer comprising or derived from a polyester polymer, a glycidyl group containing polymer, copolymers thereof, or mixtures thereof, the polymer further comprising:
- (a) at least one nitro group;
- and
- (b) an organic ester of phosphoric acid or an organic ester of phosphorous acid.
A passivating material suitable for passivating a metal surface, the passivating material comprising:
- a polymer comprising:
- (a) at least one nitro group;
- and
- (b) an organic ester of phosphoric acid or an organic ester of phosphorous acid;
- wherein the polymer comprises the reaction product of reactants comprising an aromatic epoxy group-containing compound, an aromatic nitro compound;
- and a phosphorous-containing compound.
A passivating material suitable for passivating a metal surface, the passivating material comprising:
- a polymer comprising:
- (a) at least one nitro group;
- and
- (b) an organic ester of phosphoric acid or an organic ester of phosphorous acid;
- wherein the polymer comprises the reaction product of:
- a diglycidyl ether of a polyhydric aromatic alcohol;
- a nitro compound selected from the group consisting of 2-nitrobenzoic acid, 4-nitrobenzoic acid, 2-4-dinitrobenzoic acid, and mixtures thereof;
- and
- a phosphorous-containing compound selected from the group of phosphoric acid, an alkyl, an aryl, and/or an alkyl aryl phosphonic acid, and mixtures thereof.
Dependencies are inferred from the claim text.