The aim of this work was to study the activity of novel benzalkonium and ammonium ionic liquids with 2mercaptobenzothiazolate as accelerators in the sulfur vulcanization of butadiene−styrene elastomer (SBR). In this Article, the effect of the ionic liquids on the vulcanization kinetics of the rubber compounds, the cross-link density, and the mechanical properties of the vulcanizates, as well as their resistance to thermal and UV aging, was studied. The application of novel ionic liquids allowed for the elimination of N-cyclohexyl-2-benzothiazolesulfenamide from SBR compounds and for the considerable reduction of the amount of 2-mercaptobenzothiazole present in rubber products. Synthesized salts seem to be good substitutes for standard accelerators in the sulfur vulcanization of SBR rubber, without the observation of any detrimental effects on the vulcanization process, the physical properties, or the thermal stability of the obtained vulcanizates.

The synthesis, physical properties, and antimicrobial activity of imidazolium, benzalkonium, and phosphonium ionic liquids with 2-mercaptobenzothiazolate has been studied. Synthesized ionic liquids were used as acceleration agents in the vulcanization of rubber. Use of synthesized salts allows to reduce amount of 2-mercaptobenzothiazole, which is commonly used in vulcanization but is an allergenic agent. We obtain in our research shorter vulcanization time, no loss of mechanical properties of rubber, and reduction of the allergen from 56 to 87% in comparison with the vulcanization without ILs.

The aim of this work was to study the activity of several alkylimidazolium salts of bis(trifluoromethylsulfonyl)imides to obtain a very fast vulcanization of the butadiene-styrene (SBR) elastomer. Ionic liquids (ILs) such as alkylimidazolium salts with ethyl-, propyl-, butyl-, hexyl-, decyl-, dodecyl-, and hexadecyl chains in the cation together with nanosized zinc oxide are used to develop elastomer composites with very short vulcanization time and a reduced amount of vulcanization activator. In this article, we discuss the effect of the ILs with respect to the length of alkyl chain in their cation on the vulcanization kinetics of rubber compounds. The influence of ILs on the crosslink density as well as the mechanical properties of the vulcanizates and their resistance to thermo-oxidative and UV aging were also studied. ILs resulted in a shortened optimal vulcanization time and reduced the onset vulcanization temperature compared to zinc oxide containing rubber compound. This is very important from a technological point of view. A considerable increase in the crosslink density of vulcanizates was also observed.

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