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US 6,190,523 B1Granted
Electrocoat coating composition and process for electrocoating a substrate
AssigneeBASF SE
InventorCharles L. Tazzia
Life of this patent
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Abstract
An electrocoat coating composition includes an anionic addition polymer latex and a water-insoluble crosslinking resin that is dispersed with an anionic dispersing resin.
Claims23
An electrocoat coating composition, comprising, in an aqueous medium, an anionic addition polymer latex and a water-insoluble crosslinking resin dispersed with an anionic dispersing resin.
A method of coating a conductive substrate, including steps of:
- (a) immersing a conductive substrate in an electrocoat coating composition comprising, in an aqueous medium, an anionic addition polymer latex and a water-insoluble crosslinking resin dispersed with an anionic dispersing resin;
- (b) applying a potential of electric current between a cathode and the conductive substrate to deposit a coating layer onto the conductive substrate;
- and
- (c) curing the deposited coating layer.
1 more element
A method of coating a conductive substrate, including steps of:
- (a) electrocoating the conductive substrate with a first layer of a first electrocoat coating composition containing a conductive pigment;
- (b) sufficiently drying or curing the first layer to provide a conductive first layer;
- (c) electrocoating the substrate with a second layer from a second electrocoat coating composition;
- and
- (d) fully curing the second layer and, if necessary, the first layer, wherein at least one of said first electrocoat coating composition and said second electrocoat coating composition comprises, in an aqueous medium, an anionic addition polymer latex and a water-insoluble crosslinking resin dispersed with an anionic dispersing resin.
2 more elements
Dependencies are inferred from the claim text.