Process for the production of ethylene graft copolymers containing anhydride or carboxyl groups

US4347341A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Herbert Bartl · Odenthal, DE
• Klaus Schuster · Leverkusen, DE

Key dates

• Filing date: Aug 24, 1981
• Grant date: Aug 31, 1982
• Expiry date: Aug 24, 2001

Classification

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

Abstract

A process for the production of ethylene graft copolymers containing anhydride or carboxyl groups in homogeneous or heterogeneous phase in tert.-butanol or methylene chloride wherein (A) from 5 to 70% by weight of a monomer mixture of: (a) from 10 to 80% by weight of a vinyl ester of an aliphatic C.sub.1 -C.sub.18 -monocarboxylic acid; and (b) from 90 to 30% by weight of maleic acid anhydride and/or its C.sub.1 -C.sub.20 -alkyl semiesters; are radically polymerized in the presence of (B) from 95 to 30% by weight of an ethylene homopolymer or an ethylene/vinyl ester copolymer as the graft substrate.