Styrene-butadiene-styrene block copolymer (SBS) is white granular, has excellent tensile strength, elasticity and electrical properties, and is permanent Small deformation, good flexibility and resilience, and large surface friction. Resistant to ozone, oxygen, and ultraviolet radiation, its performance is similar to that of styrene-butadiene rubber. Excellent breathability. Due to the double bonds contained in the main chain, SBS has poor aging resistance. Under the oxidation conditions of high-temperature air, the butadiene block will be cross-linked, thereby increasing the hardness and viscosity. Soluble in cyclohexane, toluene, benzene, methyl ethyl ketone, ethyl acetate, dichloroethane, but insoluble in water, ethanol, solvent gasoline, etc.
Production method:
Styrene-butadiene block copolymer rubber has three synthesis routes: monomer sequential addition method, mixed monomer copolymerization Both the method and the coupling method use butyllithium as the initiator, and the production equipment consists of butyllithium synthesis, polymerization, solvent recovery, coagulation and post-processing, which is similar to the production of butadiene rubber.
Usage:
SBS is mainly used in four major application areas: rubber products, resin modifiers, adhesives and asphalt modifiers. In terms of rubber products, SBS molded products are mainly used in the shoemaking (sole) industry, and extruded products are mainly used in hoses and tapes; as a resin modifier, a small amount of SBS is used with polypropylene (PP), polyethylene (PE), Polystyrene (PS) blending can significantly improve the low-temperature performance and impact strength of products; SBS as a binder has the characteristics of high solid content, quick drying, and low temperature resistance; SBS can be used as a modifier for construction asphalt and road asphalt. Significantly improves the weather resistance and load resistance of asphalt.
微信扫一扫打赏
