| 摘要 |
This invention relates to a composition for devulcanization of sulfur-cured rubber and a method of devulcanization of sulfur-cured rubber, and can be used to recycle used rubber articles. A composition for devulcanization of sulfur-cured rubber, which contains a devulcanizing agent for the selective destruction of sulfide bonds according to this invention, has a secondary imine as a devulcanizing agent. Further, it contains a compatibilizer compatible with both the secondary imine and the sulfur-cured rubber, at a weight ratio of the secondary imine to the compatibilizer from 1:9 to 1:20. Secondary imines break sulfide bonds in sulfur-cured rubber very effectively and selectively, while the experimentally selected compatibilizer ensures an effective penetration of the secondary imines into the rubber crumbs. As a consequence, the required concentration of secondary imines in the resulting compounded rubber does not exceed 1% (preferably, 0.1-0.5%). |
