Anti-coking agents: substances used to prevent premature vulcanization of rubber materials during processing. Usually, it includes nitroso compounds, organic acids and thiocarbamides. The commonly used ones are oxalic acid, succinic acid, lactic acid, phthalic anhydride, salicylic acid, benzoic acid, oleic acid, etc. Among them, phthalic anhydride and salicylic acid are used more often.

Anti-coke agent CTP plays an obvious role in the vulcanization system, but if sulfur is not added, the role of anti-coke agent CTP is weaker. When CTP is used with sulfur, the delayed action of sulfinyl phthalamide promoter is due to the fact that sulfinyl phthalamide must first be converted to polysulfide benzene and expose the intermediate before cross-linking can take place.

To date, the intermediate 2-lyluloylbenzene-bubbling agent (MBT) has been used as an autocatalyst for the reaction between sulfinylamide and sulfur. In this continuous autocatalytic reaction, the anti-coking agent CTP removes MBT, thereby delaying the formation of polysulfobenzene and the chemical reactions that occur prior to cross-linking. The anti-coking agent CTP reacts with MBT to form N,N-dicyclohexyl-dithiobenzene. The effect of the anti-coking agent CTP on the content of the vulcanizing agent and intermediates is that a significant amount of the anti-coking agent CTP is consumed before the content of the sulfinyl phthalamide promoter changes significantly, so that the coking time is significantly delayed.