Method of producing polyvinylidene fluoride coatings

US4255462A · kind A · utility

Assignee

• Dynamit Nobel GmbH · DE

Inventors

• Peter Gebauer · Troisdorf, DE
• Wilhelm Kaufer · Troisdorf, DE
• Helmut Mohrke · Troisdorf, DE

Key dates

• Filing date: Jul 31, 1978
• Grant date: Mar 10, 1981
• Expiry date: Jul 31, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/3154
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A powder coating composition comprising a homopolymer or copolymer of polyvinylidene fluoride having a melt flow index of 10 to 300 grams per ten minutes, determined in accordance with ASTM D 1238, Condition J and 5 to 50 weight percent of a glass having a grain size of 1 to 300 .mu.m; an improvement in a method of coating a metal or inorganic oxidic surface wherein a powder coating composition containing polyvinylidene fluoride is applied to such surface and fused thereon, the improvement residing in employing as the powder coating composition one containing 5 to 50 weight percent glass, based upon the weight of the polyvinylidene fluoride polymer; a coated object having a metallic or inorganic oxidic surface which is coated with a polyvinylidene fluoride homopolymer or copolymer which coating contains 5 to 50 weight percent, based upon the weight of the polyvinylidene fluoride, of glass particles, especially glass particles of a grain size of 1 to 300 .mu.m.