Process for the production of fluorinated surfaces of polymers

US4869859A · kind A · utility

Assignee

• Messer Griesheim GmbH · DE

Inventors

• Manfred Eschwey · Düsseldorf, DE
• Rolf van Bonn · Duisburg, DE
• Horst Neumann · Ludwigshafen, DE

Key dates

• Filing date: Nov 20, 1987
• Grant date: Sep 26, 1989
• Expiry date: Nov 20, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2323/06
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for blow molding and fluorination of a hollow thermoplastic article includes bringing a blank to rest against the inside wall of the blow mold as a result of introducing an inert blow gas. An inert gas/reaction mixture is then introduced in the hollow article for fluorinating the inside surface of the hollow article. After the inside surface of the hollow article has cooled off, the inert gas/reaction gas mixture is blown in below the melting point of the thermoplastic material.