Latent hardeners for melamine resin moulding compositions

US5021474A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

• Peter Gunther · Lampertheim, DE
• Hermann O. Wirth · Bensheim, DE
• Wilhelm Endlich · Munich, DE

Key dates

• Filing date: Feb 26, 1990
• Grant date: Jun 4, 1991
• Expiry date: Feb 26, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/053
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Moulding compositions comprising PA1 (a) a melamine/formaldehyde resin, a melamine/phenol/formaldehyde resin or a mixture of said resins, PA1 (b) organic and/or inorganic fillers, PA1 (c) a lubricant, and PA1 (d) 0.1 to 2% by weight, based on the total composition, of 3-chloro-1,2-propanediol as latent hardener, are suitable for the production of mouldings by injection moulding. The latent hardener employed permits extremely short cycle times coupled with long residence times at the cylinder temperature of the injection moulding machine. The moulding compositions are distinguished at the same time by very good flow properties.