scope:

NEN-ISO 11235 specifies the methods to be used for the evaluation of sulfenamide accelerators: - MBTS: benzothiazyl disulphide; - CBS: N-cyclohexylbenzothiazole-2-sulfenamide; - TBBS: N-tert-butylbenzothiazole-2-sulfenamide; - DIBS: N,N'-diisopropylbenzothiazole-2-sulfenamide; - DCBS: N,N'-dicyclohexylbenzothiazole-2-sulfenamide; - MBS: N-oxydiethylenebenzothiazole-2-sulfenamide. The analytical methods are applicable for most commercial sulfenamide accelerators: - sulfenamides of primary amines (type I); - sulfenamides of unhindered secondary amines (type II); - sulfenamides of hindered secondary amines (type III). The method to determine purity by high performance liquid chromatography (HPLC) is the preferred method.