Method for electrodeposition
AssigneePPG Industries, Inc.
InventorsEdward L. Jozwiak, Jr., Suryya K. Das
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Abstract
A method of preparing resinous vehicles in aqueous medium by addition polymerizing a material having CH.sub.2 .dbd.C< moieties with a partially neutralized reaction product of an unsaturated carboxylic acid or anhydride and polybutadiene is disclosed. The resinous vehicles are prepared in a manner such that they are useful for electrodeposition.
Claims7
A method of coating an electrically conductive surface which comprises passing electric current between an electrically conductive anode and an electrically conductive cathode in contact with a water-dispersed coating composition comprising a resinous vehicle which is the addition polymerization reaction product of:
- (A) a material having CH.sub.2 .dbd.C<
- moieties,
- (B) an at least 30 percent neutralized reaction product of:
- (1) an alpha, beta-ethylenically unsaturated dicarboxylic acid or its anhydride containing from 4 to 11 carbon atoms, and
- (2) polybutadiene which is a liquid at room temperature and which has a molecular weight of 700-5000;
- said polymeric reaction product having been produced in aqueous medium in the presence of an oil-soluble free radical polymerization catalyst and a chain transfer agent.
Dependencies are inferred from the claim text.