Methylene bis(alkylsulfides)as antioxidant synergists in rubber.

摘要

This invention is concerned with compounds of the structural formula: <CHEM> wherein R<1> and R<2> may be the same or different radical selected from the group consisting of hydrogen and methyl radicals; when R<1> is a hydrogen radical, R is an alkyl radical of 5 to 13 carbon atoms; when R<1> is a methyl radical, R is a radical of 4 to 12 carbon atoms; when R<2> is a hydrogen radical, R<3> is an alkyl radical of 5 to 13 carbon atoms; when R<2> is a methyl radical, R<3> is an alkyl radical of 4 to 12 carbon atoms. These compounds have utility as synergists for phenolic type and amine type antioxidants in the stabilization of natural and synthetic rubbers.