クロム含有めっきスラッジによる破砕タイヤスクラップの再生

Abstract

The reclamation of the crushed tire scrap of the truck or bus and passenger car was carried out by the mechano-chemical procedure with sludge which is formed by chemical treatment of waste plating bath and contains chromium as the main component. The sludge was found to serve as a degradation agent of main chain of rubber and the binary mixture of the sludge and thiophenol, n-butylamine or dimethylsulfoxide which act as a breaker of crosslinking points were found to be the most effective reclaiming agents. The reclaimed rubbers could be re-vulcanized with the use of a conventional sulfur-accelerator vulcanizing system and the tensile properties of the re-vulcanizates were superior to those of a commercially reclaimed one.