Method and chemical composition for reclaiming of cured elastomer materials

A method of reclaiming of a cured elastomer material, comprising the steps of:

• a) mixing said cured elastomer in form of crumbs or chips with a devulcanization-aiding chemical composition, and
• b) devulcanizing said cured material by applying a shear-stress deformation to said mixture of the crumbs or chips with a devulcanization-aiding chemical while performing a mechanical disintegration of the cured elastomer into fine-ground crumbs under controllable temperature not exceeding about 90 degrees C.;
• wherein said chemical composition comprises ingredients as follows:
• (i) first agent promoting scission of sulfide bonds of free radicals formed under said shear-stress deformation, which is selected from the following classes:
• of amines and sulfides and their derivatives;
• (ii) second agent providing the pre-set acidity in the course of the process and thus inhibiting recombination of sulfide bonds, which is selected from the following classes:
• organic acids and their anhydrides;
• (iii) third agent contributing to fast stabilization of the free radicals, which is selected from the class of oxidants, and
• (iv) fourth agent promoting redox reaction, which is selected from oxides of metals with variable valence.