The biggest dosage of coupling agent with sulfur is Si – 69 which mainly used in tire industry.

Si – 69 can increase the tyres friction, especially increase wet tyres grip ability, but in fact silicon carbon black is better, Si - 69 can improve the combination of white carbon black and rubber, besides, it is becoming a mainstream of vulcanizing agent

White carbon black can improve sliding friction, reduce the effect of rolling friction, also give the tyres a so-called hysteresis properties, these performance must rely on sulfur coupling agent which play as a bridge.

Mercapto-coupling agent’s performance is very good, but the bad smell problem restricts the play, One way to solve this problem is closing mercapto, and unlock when necessary;The other is to connect on amino, carboxyl which can reduce the volatility of compounds.

Coupling agent contain sulfuric acid base is also belong to this catalogue, the product has a very good performance: hydrophilic, resistance to metal ion, it has applied in special industry.