Water-based coating composition having carbonate—amine cross-linking, method of preparing the same, and a cured film thereof

US6403709B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Swaminathan Ramesh · Canton, US
• Paul Lessek · Milford, US
• Wolfgang Bremser · Münster, DE

Key dates

• Filing date: Dec 22, 2000
• Grant date: Jun 11, 2002
• Expiry date: Dec 22, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F8/32
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention is directed to a curable, water-based coating composition utilized in waterborne coating systems. The coating composition is the reaction product of a water-based copolymer prepared by free-radical polymerization, and a cross-linking agent. The copolymer is the reaction product of a first block and a second block. The first block is the reaction product of a first ethylenically unsaturated monomer, acrylic acid, and a second ethylenically unsaturated monomer, methyl methacrylate, as wells as the reaction product of a vinylaromatic hydrocarbon monomer, diphenylethylene. The second block is the reaction product of a plurality of ethylenically unsaturated monomers, styrene, 2-ethylhexyl methacrylate, cyclohexyl methacrylate, and carbonate-modified glycidyl methacrylate including a carbonate functional group. The cross-linking agent, triaminononane, includes amino functional groups that react with the carbonate functional group to establish a coating composition having of carbonate—amine cross-linking. Methods for preparing the coating composition and a cured film are also disclosed.