Process for forming a resinous coating from an autodepositing composition which includes internally stabilized vinylidene chloride copolymer

US6224947A · kind A · utility

Assignee

• Henkel Limited

Inventors

• Wilbur S. Hall · Conshohocken, US
• Herbert Fischer · Goldkronach, DE
• Roland Morlock · Bergheim, DE

Key dates

• Filing date: Jun 6, 1995
• Grant date: May 1, 2001
• Expiry date: Jun 6, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31699
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Improved autodeposited coatings on metallic surfaces are formed by contacting the metallic surfaces with an autodepositing composition comprising an acidic aqueous coating solution containing dispersed solid resin particles or either an internally stabilized or externally stabilized vinylidene chloride polymer, an exemplary internally stabilized polymer being prepared from vinylidene chloride and a monomeric surfactant which includes an inorganic ionizable group, and an exemplary externally stabilized polymer being prepared from vinylidene chloride and a reactive comonomer, the resulting resin particles having surfactant adsorbed thereon, said autodeposited coatings having extremely good corrosion resistant properties without treatment with a reaction rinse such as a chromium rinse.