Process for preparing liquid compositions of etherified melamine formaldehyde resins

US11739235B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Stephan Weinkoetz · Ludwigshafen am Rhein, DE
• Dieter Weilacher · Ludwigshafen, DE
• Guenter Scherr · Ludwigshafen, DE
• Jens Steinbeck · Ludwigshafen, DE
• Evelyn Fuchs · Mannheim, DE
• Ralf Strohmeier · Ludwigshafen, DE
• Daniel Flojhar · Ludwigshafen, DE

Key dates

• Filing date: Dec 20, 2017
• Grant date: Aug 29, 2023
• Expiry date: Oct 1, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F220/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing liquid compositions of etherified melamine formaldehyde resins, namely melamine formaldehyde resins etherified with a primary C1-C6-alkanol, which have low formaldehyde contents. The invention also relates to such liquid compositions of etherified melamine formaldehyde resins having a content of free formaldehyde of less than 0.3% by weight. The liquid compositions of etherified melamine formaldehyde resins are useful as crosslinking agents in coating compositions.