Phosphonite-hals and phosphite-hals compounds as stabilizers

US5616636A · kind A · utility

Assignee

• Sandoz AG · CH

Inventors

• Lajos Avar · Oberwil, CH
• Peter Staniek · Binzen, DE
• Klaus Stoll · Binzen, DE
• Wolf-Dieter Habicher · Dresden, DE
• Uwe Hahner · Dresden, DE

Key dates

• Filing date: Feb 27, 1995
• Grant date: Apr 1, 1997
• Expiry date: Feb 27, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D7/48
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A composition comprising: PA1 a) a compound containing a phosphite or phosphonite group and at least one 2,2,6,6-tetraalkylpiperidinyl group, and PA1 b) a polyolefin which has been produced in the presence of a catalyst which is either PA2 i) a supported Zeigler catalyst or PA2 ii) a metallocene catalyst, from which polyolefin the catalyst has not been removed.