Prevulcanisation inhibitors

Accelerated sulphur systems also require the use of an activator comprising a metal oxide, usually zinc oxide, and a fatty acid, commonly stearic acid. For some purposes, for example where a high degree of transparency is required, the activator may be a fatty acid salt such as zinc stearate. Thus a basic curing system has four components sulphur vulcanising agent, accelerator (sometimes combinations of accelerators), metal oxide and fatty acid. In addition, in order to improve the resistance to scorching, a prevulcanisation inhibitor such as A -cyclohexylthiophthalimide may be incorporated without adverse effects on either cure rate or physical properties. 

Abbreviation for A-isopropylthio-A-cyclohexylbenzothiazyl-2-sulphenamide, a prevulcanisation inhibitor. 

More recently, prevulcanisation inhibitors based on thioketals have been introduced ... 

Antidegradants including waxes, antiozonants, antioxidants, and prevulcanisation inhibitors are also necessary for good processability and performance of rubbery parts. Unfortunately, these materials are also had for adhesion because they can also migrate to the rubber surface and interfere with crosshridging reactions. The lowest possible amount of these materials necessary to get acceptable part performance without causing blooming to the surface of the rubber is preferred. 

STUDIES OF VULCANISING AGENTS AND ACCELERATORS. IX. SULPHYLIMINES AS PREVULCANISATION INHIBITORS... 

C YCLOHEXYLTHIO)PHTHALIMIDE AS A PREVULCANISATION INHIBITOR OF 2-BISBENZOTHIAZOLE-2,2 -DISULPHIDE ACCELERATED SULPHUR VULCANISATION... 

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