What material is SEBS?
SEBS is a linear triblock with polystyrene as the terminal block and ethylene-butene copolymer obtained by hydrogenation of polybutadiene as the middle elastic block. Copolymer. SEBS does not contain unsaturated double bonds, so it has good stability and aging resistance.
SEBS is saturated SBS, or hydrogenated SBS, which is made by hydrogenating special linear SBS to saturate double bonds. SBS is appropriately oriented in the presence of a catalyst Hydrogenation will hydrogenate the polybutadiene segment into polyethylene (E) and polybutene (B) chain drums, so it is called SEBS. Similarly, after SIS is hydrogenated, the polyisoprene is converted into polyethylene (E) and polypropylene segments to obtain saturated SIS (SEPS).
Hydrogenated SBS is generally harder, more rigid, and has a higher modulus. The tensile strength is significantly higher than before hydrogenation, and the elongation at break is reduced. Since SEBS has no or few double bonds in the molecular chain, its aging resistance to photooxygen and ozone is obviously better.
1. Better temperature resistance, good solubility
2. Excellent aging resistance, excellent electrical properties
3. An elastomer that can be used without vulcanization. Its processing performance is similar to that of SBS. The scrap can be reused. It meets environmental requirements, is non-toxic, and meets FDA requirements.
4. The specific gravity is lighter, about 0.91. The same weight can produce more bulky products.
SEBS has excellent aging resistance, both plasticity and high elasticity. It can be processed and used without vulcanization. The leftover material can be reused. SEBS is widely used in production. High-grade elastomers, plastic modification, adhesives, lubricating oil tackifiers, fillers and sheathing materials for wires and cables, etc.