Cationic polyurethane-based polymer dispersions
First Claim
1. A cationically depositable electrodeposition bath comprising a cathodically depositable binder, and an aqueous dispersion prepared by free-radically initiated emulsion polymerization, in water in the presence of a cationically stabilized polyurethane emulsifier, of (i) one or more vinyl monomers and (ii) a molar proportion of from 0.001 to 15%, based on the sum of molar amounts of olefinically unsaturated monomers of one or more polyolefinically unsaturated monomers selected from the group consisting of divinyl benzene, butanediol diacrylate, glycol divinyl ether, divinyl adipate, allyl vinyl ether, triallyl cyanurate, and diallyl fumarate.
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Accused Products
Abstract
Process for preparing aqueous dispersions by free-radically initiated emulsion polymerization of one or more vinyl monomers in water in the presence of a cationically stabilized polyurethane as emulsifier.
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Citations
14 Claims
- 1. A cationically depositable electrodeposition bath comprising a cathodically depositable binder, and an aqueous dispersion prepared by free-radically initiated emulsion polymerization, in water in the presence of a cationically stabilized polyurethane emulsifier, of (i) one or more vinyl monomers and (ii) a molar proportion of from 0.001 to 15%, based on the sum of molar amounts of olefinically unsaturated monomers of one or more polyolefinically unsaturated monomers selected from the group consisting of divinyl benzene, butanediol diacrylate, glycol divinyl ether, divinyl adipate, allyl vinyl ether, triallyl cyanurate, and diallyl fumarate.
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14. A process for coating an electrically conductive substrate by an electrodeposition technique, comprising immersing the substrate in a bath liquid and connecting the substrate as a cathode, wherein the bath liquid includes 0.1 to 10% of an aqueous dispersion prepared by free-radically initiated emulsion polymerization, in water in the presence of a cationically stabilized polyurethane emulsifier of (i) one or more vinyl monomers and (ii) a molar proportion of from 0.001 to 15%, based on the sum of molar amounts of olefinically unsaturated monomers of one or more polyolefinically unsaturated monomers selected from the group consisting of divinyl benzene, butanediol diacrylate, glycol divinyl ether, divinyl adipate, allyl vinyl ether, triallyl cyanurate, and diallyl fumarate.
Specification