Stabilized polyester molding compositions

US5733959A · kind A · utility

Assignee

• BASF SE

Inventors

• Thomas Heitz · Ludwigshafen am Rhein, DE
• Manfred Heym · Bad Dürkheim, DE
• Klaus Mühlbach · Grünstadt, DE
• Christoph Plachetta · Schifferstadt, DE

Key dates

• Filing date: May 30, 1997
• Grant date: Mar 31, 1998
• Expiry date: May 30, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L67/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Thermoplastic molding compositions comprise A) from 20 to 99% by weight of a polyester, up to 90% by weight of which may be replaced by a polycarbonate or a polyamide, B) from 0.1 to 7% by weight of a carbodiimide of the formula I ##STR1## where R.sup.1 are identical or different radicals selected from the group consisting of --NCO, --NHCONHR.sup.5, --NHCONR.sup.5 R.sup.6 and --NHCOOR.sup.7, where R.sup.5 , R.sup.6 are identical or different and are alkyl, cycloalkyl or aralkyl, R.sup.7 is the same as R.sup.5 or is alkoxy(poly)oxyalkylene and R.sup.2 , R.sup.3 are identical or different aliphatic radicals having from 1 to 18 carbon atoms or cycloaliphatic radicals having from 5 to 15 carbon atoms or aromatic radicals having from 6 to 15 carbon atoms, R.sup.4 are identical or different aliphatic radicals having from 2 to 20 carbon atoms or halogen or alkoxy, x is an integer from 0 to 4 and n is an integer from 0 to 10, C) from 0 to 75% by weight of conventional additives and processing aids, where the sum of the percentages by weight of components A) to C) is 100%.