Aqueous wax dispersions as preservatives for metal surfaces and surfaces of coatings, their use and a process for preserving metal surfaces and surfaces of coatings

US4693909A · kind A · utility

Assignee

• BASF SE

Inventors

• Walter Ziegler · Trier, DE
• Wolfram Dietsche · Bischofswerda, DE
• Stefan Weiss · Trostberg, DE
• Richard W. Mueller · Bad Dürkheim, DE
• Albert Hettche · Heßheim, DE
• Klaus Glaser · Mutterstadt, DE
• Christos Vamvakaris · Kallstadt, DE

Key dates

• Filing date: Mar 24, 1986
• Grant date: Sep 15, 1987
• Expiry date: Mar 24, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D123/08
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A liquid preservative for plated or unplated metal surfaces and surfaces of coatings, in the form of an aqueous wax dispersion which contains a special ethylene/acrylic acid copolymer wax, consisting of from 8 to 25% by weight of acrylic acid units and from 92 to 75% by weight of ethylene units, in partially or completely neutralized form, if appropriate as a mixture with waxes based on polyethylene oxidation products and/or hydrocarbon waxes, the use of this special ethylene/acrylic acid copolymer wax for preserving plated or unplated metal surfaces and surfaces of coatings, and a process for temporarily preserving metal surfaces and surfaces of coatings.