Study on Reduction of Zinc Oxide Level in Rubber Compounds Part I

摘要

The impact of reducing zinc oxide content in IR and E-SBR compounds on vulcanisation kinetics and vulcanisate properties was investigated by using active ZnO(100 nm) and standard ZnO (1 mu m) and by considering the activation of ZnO by the phase transfer catalyst 18-crown-6. It was found that active ZnO tends to agglomerate in rubber compounds. The difference in activity between active and standard ZnO grades is smaller in IR compounds than in SBR ones. It was proven that 18-cown-6 can play an active role in catalyzing the cross-linking reaction, while causing increased reversion in IR compounds. It is shown that the ZnO content can be reduced in carbon black filled IR compounds to 2 phr and in E-SBR compounds even to 1 phr without affecting vulcanisation kinetics and vulcanisate properties.