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Full Description

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


    Cross References:
    ISO 385
    ISO 648
    ISO 1772
    ISO 3819
    ISO 4788
    ISO 4793
    ISO 6556
    ISO 15528
    ISO/TR 9272


    All current amendments available at time of purchase are included with the purchase of this document.
 

Document History

  1. BS ISO 11235:2023


    Rubber compounding ingredients. Sulfenamide accelerators. Test methods

    • Most Recent
  2. BS ISO 11235:2016

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    Rubber compounding ingredients. Sulfenamide accelerators. Test methods

    • Historical Version
  3. BS ISO 11235:1999


    Rubber compounding ingredients. Sulfenamide accelerators. Test methods

    • Historical Version