The Cross-Linking of Methyl-Vinyl Silicones with Organic Peroxides

摘要

A study of the cross-linking efficiency of selected organic peroxides in silicone gum and of the mechanical properties, heat stability, and processing of the resulting vulcanisates indicates that 2,5-dimethyl 2,5-ditertiary butyl peroxy hexane is to be preferred to the dichlorobenzoyl peroxide normally used. Vulcanisates produced with this peroxide give a better all around level of properties with a much more economical cure cycle, and there are indications that substantially improved heat aging properties could be obtained if a suitable alternative to fine silica as a reinforcing filler could be found. (Author)