Vulcanizing agent for EPDM rubber mixtures, e.g. for production of profiles for use in cars and building, contains a mixture of poly-alkylphenol polysulfides and an optionally N-substituted urea

摘要

A Vulcanizing agent comprising 10-90 wt.% of a mixture of poly-alkylphenol polysulfides and 10-90 wt% of an optionally N-substituted urea. A sulfur-donor Vulcanizing agent comprising (A) 10-90 wt.% of a mixture of poly-alkylphenol polysulfides of formula (I) and (B) 10-90 wt.% of a compound of formula R'NHCONHR (II); [Image] R : 1- 20C alkyl; n, n' : 1-8; p : 0-50; R', R'' : H or a 1-20C alkyl or aryl group. An independent claim is also included for a method for the vulcanization of EPDM-type elastomer compositions without any risk from nitrosamines, by incorporating an effective amount of the above Vulcanizing agent into the elastomer composition.