Patent ID: 6447620
Filing Date: 2002-09-10
Classification: C09D,C23C

Abstract:
A water-based surface-treating agent for metallic materials that has a pH of 5 or less and comprises water and a synthetic resin emulsion obtained by emulsion polymerizing the following ingredients:(1) a first monomer component consisting of one or more ethenic unsaturated carboxylic acids; (2) a second monomer component consisting of functional acrylic monomers that contain at least one of N-(unsubstituted or methylol substituted)carbamoyl, phosphonate, alkoxy, cyano, and carbamoyl groups; and (3) a third monomer component that is not included in components (1) or (2), is copolymerizable with the monomers of components (1) and (2), and forms the skeleton of the copolymer to be obtained, the emulsifier for emulsion polymerizing comprising:a reactive emulsifier that: is nonionic; has at least one reactive carbon-carbon double bond per molecule; and has radical polymerization ability; and a nonionic emulsifier with no radical polymerization property.