Polyacetals having an improved maximum sustained-use temperature

US4386178A · kind A · utility

Assignee

• BASF SE

Inventors

• Wilhelm Schuette · Speyer, DE
• Albrecht Hilt · Ludwigshafen, DE
• Manfred Walter · Nuremberg, DE
• Klaus Boehlke

Key dates

• Filing date: Oct 28, 1981
• Grant date: May 31, 1983
• Expiry date: Oct 28, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L61/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyacetal molding materials which contain, as a stabilizer, from 0.1 to 10% by weight of a melamine resin, the latter being a melamine-formaldehyde condensate, having a mean degree of polymerization of from 1.2 to 6.0 and a melamine:formaldehyde ratio of from 1:2 to 1:5.5, which has been partially etherified with a C.sub.1 -C.sub.4 -alkanol so that the ratio melamine:ether radicals is from 1:1.5 to 1:5.0 and the ratio melamine:free methylol groups is from 1:0.5 to 1:3. The molding materials can be converted to moldings which can be used industrially at elevated ambient temperatures.