A study of curative interactions in the presence of cobalt(II) stearate

The curative interactions with the participation of dicyclohcxylbenzothiazo le-2-sulfenamide (DCBS), stearic acid (SA), ZnO, S, and Co(II) stearate (oc tadccanoate-CoC18) as adhesive promoter have been investigated by means of DSC calorimetry, EPR, and IR spectroscopy in the absence of rubber. It has been found that in the presence of CoC18, DCBS, and S, structural changes h ave been observed on the action of heat, which are connected with the forma tion of polysulfide complexes between Co2+ ions, DCBS fragments, and sulphu r. In the presence of SA and ZnO in the five-component system, zinc(II) oct adecanoate is formed. (C) 2001 John Wiley & Sons, Inc.