Stable melamine polyol dispersions, a process for their manufacture and for the preparation of foamed polyurethane plastics

US4293657A · kind A · utility

Assignee

• BASF SE

Inventors

• Dietmar Nissen · Heidelberg, DE
• Matthias Marx · Fürstenfeldbruck, DE
• Wolfgang Jarre · Ludwigshafen, DE
• Ernst Schoen · Diepholz, DE
• Walter Decker · Ludwigshafen, DE

Key dates

• Filing date: Jul 7, 1980
• Grant date: Oct 6, 1981
• Expiry date: Jul 7, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Stable melamine-polyoxyalkylene polyether polyol dispersions are prepared by the in situ reduction of melamine particles wherein 90 percent of the melamine particles have a particle size of less than 10 microns. Stabilizers for the melamine-polyol dispersion are selected from the group consisting of PA0 (a) silicic acids and silicates, PA0 (b) salts of perfluorinated alkyl carboxylic acids having 4 to 20 carbon atoms, salts of alkyl sulfonic acids and perfluorinated alkylsulfonic acids having 4 to 20 carbon atoms and polyperfluoroether polyols having molecular weights of 300 to 6000, and PA0 (c) salts of fatty alcohol sulfates having 6 to 30 carbon atoms. These dispersions are useful for the preparation of polyurethane foams.