ISO 11235:2016

Rubber compounding ingredients — Sulfenamide accelerators — Test methods

ISO 11235:2016 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.

NOTE Although MBTS is not a sulfenamide, it is the primary decomposition product of these accelerators and quantitatively determined by the method specified in 5.2.

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 (5.2) to determine purity by high performance liquid chromatography (HPLC) is the preferred method.

Edition	2016
Published Date	2016
Published By	International Standardization Organisation
Page Count	25