Patent ID: 8304458

Claim:
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.