SBS elastomer simultaneously having high transmittance, high twisting resistance and high foaming efficiency, and production method thereof

The invention provides an SBS elastomer simultaneously having high transmittance, high twisting resistance and high foaming efficiency, and a production method thereof. The SBS elastomer includes one of or a combination containing at least two of polymers with the following structures: PS-PB-PB/PS-PB and (PS-PB-PB/PS-PB)n-R, wherein PS is a polystyrene chain segment, PB is a polybutadiene chain segment, PB/PB is a butadiene and styrene random copolymer chain segment, the donor of R is an organosiloxane compound or an epoxy compound, and n is an integer in a range of 1-4. A result of shoe material test of the produced SBS elastomer shows that no cracks appear after 50000 times twisting test and the lowest sole density can reach 0.65-0.78 g/cm , and a result of transparence test of a thin sheet with the thickness of 2.0 mm shows that the light transmittance is 88-90.6% and the haze is 4.2-8.3%, so the produced SBS has the characteristics of high transmittance, high twisting resistance, high foaming efficiency and wide application prospect.