Polyolefin stabilization

US5488079A · kind A · utility

Assignee

• Sandoz AG · CH

Inventor

• Peter Staniek · Binzen, DE

Key dates

• Filing date: Oct 17, 1994
• Grant date: Jan 30, 1996
• Expiry date: Oct 17, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/50
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A polyolefinic composition comprising as component a) one or more compounds of formula I to III ##STR1## in which each R.sub.1 independently is selected from linear or branched C.sub.1-30 alkyl, C.sub.5-12 cycloalkyl, C.sub.2-24 alkenyl, C.sub.2-18 alkoxyalkyl, C.sub.2-19 methoxyalkanoyl, C.sub.7-30 alkaryl, C.sub.7-30 aralkyl, C.sub.4-24 heteroaryl PA1 R.sub.4 and R.sub.5 independently are selected from hydrogen, C.sub.1-30 alkyl C.sub.5-12 cycloalkyl, C.sub.6-24 aryl, C.sub.7-30 alkaryl or C.sub.7-30 aralkyl; PA1 A is a direct bond, a group --(P--R.sub.1).sub.p -- or an n-valent aliphatic or aromatic residue; provided that when n is 2 then A is --CH.sub.2 -- or C.sub.5-30 alkylene; PA1 m is 3 to 12; PA1 n is 2 to 5; PA1 p is 1 to 12; and PA0 component b) a polyolefin which has been produced in the presence of a Ziegler or metallocene type catalyst which has not been removed.