| 摘要 |
The 1,2-polybutadiene of the present invention, the 1,2- bond content in butadiene unit is 70% by weight or more, a melting point is in a range of 50-140 DEG C, the viscosity eta measured with a slit die rheometer at a shear rate of 5113sec<-1> is in a range of 400-1200 poises at 120 DEG C in a range of 300-1000 poises at 150 DEG C, and in a range of 200-800 poises at 180 DEG C, and a total halogen content is 30ppm and less. When this is molded at a high temperature, a problem of the mold contamination, the thermal deterioration and change in the physical properties with time is improved, the molded article has the excellent properties such as the moldability, the transparency, the mechanical strength property, the wet skid resistance and the like, and is suitably used as a thermoplastic elastomer such as industrial parts and various molded articles such as footwears, various sheets, films and the like. In addition, 1,2-polybutadiene of the present invention has a molding temperature of about 15 DEG C, being low among thermoplastic elastomers, and is also advantageous in respect of the energy. In addition, since 1,2-polybutadiene of the present invention can be vulcanized, and is excellent in a degree of the peroxide cross-linking activity and the filling property for a filler and a drug, it can be utilized as a vulcanizing rubber, or as a reaction aid for other vulcanizing rubbers. In addition, the thermoplastic elastomer composition of the present invention contains other thermoplastic elastomer and the aforementioned 1,2-polybutadiene and, when this is molded, the excellent nature such as moldability, the molded article appearance and the scratch resistance is exhibited. <IMAGE>
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