Peroxide-free grafting of homopolymers and copolymers of ethylene having densities less than 0.930 g/cm.sup.3, and use of the graft copolymers for the preparation of ionomers or adhesion promoters

US5189120A · kind A · utility

Assignee

• BASF SE

Inventors

• Norbert Hasenbein · Dirmstein, DE
• Peter Bauer · Ludwigshafen, DE
• Lothar Schlemmer · Frankenthal (Pfalz), DE
• Alfred F. Hauss
• Hans Gropper · Schifferstadt, DE
• Rainer Ohlinger · Hannover, DE

Key dates

• Filing date: Oct 30, 1990
• Grant date: Feb 23, 1993
• Expiry date: Oct 30, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F255/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a process for the peroxide-free grafting of ethylenically unsaturated carboxylic acids, carboxylic anhydrides and/or their derivatives to a homopolymer or copolymer of ethylene having a density less than 0.930 g/cm.sup.3, the monomers to be grafted are used in a concentration of from 0.01 to 0.5% by weight and the grafting reaction is carried out at from 210.degree. to 300.degree. C. in a conventional extruder or mixer in the absence of a free radical initiator. The graft copolymers are used for the preparation of ionomers and adhesion promoters.