Method for producing a coating powder composition

US6368725B1 · kind B1 · utility

Assignee

• E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

• Knut Graf · Hattingen, DE
• Hans-Ulrich Simmrock · Düsseldorf, DE
• Alexandra Jacobs · Niedernhausen, DE
• Volker Mörs · Frankfurt, DE
• Bennett C. Ward · Charlotte, US

Key dates

• Filing date: Oct 13, 2000
• Grant date: Apr 9, 2002
• Expiry date: Oct 13, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31794
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Process for the preparation of a powder lacquer composition based on polyester bya) common or separate heating to a temperature of 120-200° C. of A) 99-40 wt. % polyester precondensates, and/or of monomers usable for the preparation thereof, B) 1-60 wt. % pigments and C) 0-10 wt. % wetting additives and/or further additives which are conventionally used for lacquers, wherein the percentages by weight total 100%,b) homogeneous mixing of the components A), B) and C) with the application of shear forces and with the heating temperature maintained,c) dispersion of the mixture obtained in a dispersing medium at a temperature equal to or above the melting temperature of the starting components A), B) and C) with further polycondensation of the polyester precondensate A), and/or of the monomers,d) cooling of the dispersion and addition of a conventional cross-linking agent for the polyester and optionally of conventional additives, within the temperature range 60 to 140° C.