Low molecular weight copolymers and covulcanisates produced therefrom

US4647627A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hartmuth Buding · Titz, DE
• Zsolt Szentivanyi · Leverkusen, DE
• Joachim Thormer · Leverkusen, DE

Key dates

• Filing date: Aug 28, 1985
• Grant date: Mar 3, 1987
• Expiry date: Aug 28, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Statistical copolymers of from 85 to 52% by weight of a conjugated diene, from 15 to 48% by weight of at least one unsaturated nitrile and from 0 to 10% by weight of further monomers, copolymerizable with diene and nitrile, which have a molecular weight M.sub.n of from 0.5 to 30 kg/mol and a degree of hydrogenation of the double bonds of greater than 80%, give nitrile rubbers, which are mixed and colvulcanized with these copolymers, an increased ozone resistance.