Patent · US Expired

Latent hardeners for melamine resin moulding compositions

US4925887A · kind A · utility

3Cited by

4References

9Claims

0Family size

Assignee

Ciba-Geigy · US

Inventors

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

Key dates

Filing date	Apr 7, 1989
Grant date	May 15, 1990
Priority date	—
Expiry date	Apr 7, 2009

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08K5/053
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Moulding compositions comprising PA0 (a) a melamine/formaldehyde resin, a melamine/phenol/formaldehyde resin or a mixture of said resins, PA0 (b) organic and/or inorganic fillters, PA0 (c) a lubricant, and PA0 (d) 0.1 to 2% by weight, based on 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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.