Process for the preparation of diene rubber vulcanizates

US5342900A · kind A · utility

Assignee

• Huls Aktiengesellschaft · DE

Inventors

• Jurgen Wolpers · Bochum, DE
• Dieter Zerpner
• Karl-Heinz Nordsiek

Key dates

• Filing date: Aug 31, 1992
• Grant date: Aug 30, 1994
• Expiry date: Aug 31, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/39
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Vulcanization of diene rubbers at a temperature of from 140.degree. to 200.degree. C. in the presence of 1 to 4.5 parts of a crosslinker having the formula ##STR1## wherein n denotes 2 or 6 and Bz denotes benzyl, in the simultaneous presence of a very small amount of sulfur and a small amount of a mercapto or sulfenamide accelerator or mixtures thereof affords elastomers having a previously unachieved outstanding ageing stability and reversion stability, after relatively short vulcanization times using economical amounts of chemicals while avoiding blooming phenomena in the vulcanizate.