Vulcanization system, rubber mixture containing said system and a process of vulcanization

US4340695A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Rudiger Schubart · Wittlich, DE
• Ulrich Eholzer
• Theo Kempermann
• Ernst Roos

Key dates

• Filing date: Apr 8, 1981
• Grant date: Jul 20, 1982
• Expiry date: Apr 8, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/41
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A vulcanization system consisting of PA0 (a) 20-50 parts by weight of sulphur or 20-50 parts by weight of a sulphur donor, PA0 (b) 20-50 parts by weight of an accelerator of the mercapto or sulphenamide group, PA0 (c) 0-10 parts by weight of a conventional accelerator additive, and PA0 (d) 20-50 parts by weight of a compound corresponding to the general formula (i): ##STR1## wherein R.sub.1 to R.sub.5 are identical or different and denote hydrogen, halogen, nitro, cyano, CF.sub.3, CCl.sub.3, carboxyl, an alkoxy group containing 1-4 C-atoms in the alkyl part, or a C.sub.1 -C.sub.4 alkyl group but the groups R.sub.1 -R.sub.5 must not all be hydrogen; PA0 x represents 1-4, preferably 2-3, PA0 y represents 0 or 1, and PA0 Z denotes divalent groups such as ##STR2## C.sub.1 -C.sub.12 alkylene, C.sub.4 -C.sub.12 cycloalkylene, C.sub.6 -C.sub.10 arylene or C.sub.8 -C.sub.12 arylalkylene, and PA0 R.sub.6 denotes the group corresponding to the formula: ##STR3## wherein R.sub.1 -R.sub.5 have the meaning indicated above and may all be hydrogen; PA0 C.sub.1 -C.sub.12 alkyl or a C.sub.4 -C.sub.12 cycloalkylene optionally substituted by OH and/or alkoxy with 1-4 C-atoms in the alkoxy group; PA0 b…