The 1,4-cis of Low cis BR(LBR) can be controlled by the mehtod of production and the type of catalyst. KUMHO KBR has 34.5% of 1,4-cis content. It is used as a base polymer in the production of HIPS(High Impact Polystyrene), which is the main material applied to the manufacture of cabinets for home appliances, interior goods, toys, and everyday goods, due to its excellent elasticity and 1,2-vinyl content around 14.5%, giving it excellent reactivity. In addition, it is used in motorcycle tires, footwears, and general mechanical products.
KUMHO KBR 710S has a mooney viscosity of around 50, 34.5% of 1,4-cis and 14.5% of 1,2-vinyl content. When melted in styrene to 5% concentration, it is transformed into a bright color rubber with the tone of APHA color 5. Having a low gel content and solution viscosity near 173 cps, KUMHO KBR 710S is used as a base polymer of HIPS products.