Liquid rubber technology:-)

Kuraray CO. LTD. is a producer of specialty chemicals and now, has developed Liquid Rubber (KLR). It was driven to transition from solid polyisoprene (IR) to liquid polyisoprene for improved rubber properties. This development dates back to the early 1970s when the isoprene rubber market was becoming more commoditized. Kuraray launched its liquid rubber as a niche product and high value-added material.

KLR function as reactive plasticizers but have far higher molecular weight than normal plasticizers. They are co-vulcanizable and reduce migration significantly, which improves the product’s shelf life. This property is valued highly in the tire industry. While improving the processability of rubber compounding in tires, KLR enhances the performance of tires greatly by simultaneously controlling the balance of grip, fuel efficiency and wear resistance.
The material is mainly used as a structural and functional additive for high performance rubbers to meet customer needs. The key properties are molecular weight and a unique structure. This includes copolymer content, hydrogenation, and vinyl content or functionalized groups. KLR has a narrow molecular weight distribution which comes from our synthesizing technologies. KLR provides customers with the largest amount of possibilities for molecular designs with narrower molecular weight distribution.
Once KLR is in the mixing stage it is easily processed. Due to its high viscosity, it is ready packed in polyolefin pouches (e.g. 2 kg), which can be poured directly into the mixer. Another option is to prepare liquid rubber in pre-heated drums to reduce the viscosity.

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