Process for activating vulcanized waste rubber particles and a process for producing a rubber-like article using said activated waste rubber particles

摘要

A process for activating vulcanized waster rubber particles by treating the waste rubber particles with a rubber latex and a curing system and drying the treated waste rubber particles. The waste rubber particles are preferably treated with 1 to 4% by weight of rubber latex (calculated as dry substance) and 0.5 to 3% by weight of sulfur as vulcanizing agent, both being calculated on the waster rubber particles. The treatment is carried out conveniently by mixing the waste rubber particles with the vulcanizing agent, adding the latex at a temperature of from 70 to 90 C. and stirring the obtained mixture for 5 to 10 min. so as to evaporate the water. Also disclosed are processes for producing a rubber-like article by molding the activated waste rubber particles, whether or not mixed with a non-vulcanized rubber compound, while applying heat and pressure.