Process for modifying visosity of ethylene copolymers

US5194516A · kind A · utility

Assignee

• E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

• John R. Fisher · Langhorne, US
• Jerald Harrell · Wilmington, US
• Wolfgang Honsberg · Wilmington, US
• John W. Paul · Beaumont, US

Key dates

• Filing date: Oct 1, 1991
• Grant date: Mar 16, 1993
• Expiry date: Oct 1, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2800/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The viscosity of copolymers of a) ethylene and C.sub.1 -C.sub.8 acrylate or methacrylates or b) ethylene, vinyl esters of C.sub.1 -C.sub.4 carboxylic acids, and another comonomer selected from the group consisting of carbon monoxide, acrylic acid, methacrylic acid, or a glycidyl ester of acrylic or methacrylic acid is increased, while maintaining gel content at a level of less than 3%, by treatment with a free radical generating agent.