The acceleration potential of ZNIBU [tetrabutyl ammonium bis(4-methylphenyldithiocarbimatozincate(II))] in the vulcanization process of natural rubber compounds was investigated. The vulcanized compounds were tested for hardness, resilience and density and compared with those vulcanized with commercial accelerators such as CBS (N-cyclohexyl-2-benzothiazolesulphenamide), TMTD (tetramethyl thiuram disulphide) and MBTS (dibenzothiazole disulphide). The new accelerator tested was found to be too slow for a commercial application, but its properties were similar to those of other accelerators.
Vulcanization; accelerators; natural rubber (NR); dithiocarbimates
