申请人:JSR Corporation
公开号:EP1306396A1
公开(公告)日:2003-05-02
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°C, the viscosity η measured with a slit die rheometer at a shear rate of 5113sec-1 is in a range of 400-1200 poises at 120°C in a range of 300-1000 poises at 150°C, and in a range of 200-800 poises at 180°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°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.
本发明的 1,2-聚丁二烯,丁二烯单元中的 1,2 键含量为 70%(重量比)或更高,熔点在 50-140°C 范围内,在剪切速率为 5113sec-1 时用缝模流变仪测量的粘度 η 在 120°C 时在 400-1200 poises 范围内,在 150°C 时在 300-1000 poises 范围内,在 180°C 时在 200-800 poises 范围内,总卤素含量在 30ppm 及以下。在高温下成型时,模具污染、热变质和物性随时间变化的问题得到改善,成型品具有良好的成型性、透明性、机械强度特性、防滑性等特性,适合用作热塑性弹性体,如工业部件和各种成型品,如鞋类、各种片材、薄膜等。此外,本发明的 1,2-聚丁二烯的成型温度约为 15°C,在热塑性弹性体中较低,在能量方面也具有优势。此外,由于本发明的 1,2-聚丁二烯可以硫化,并且在一定程度上具有优异的过氧化物交联活性以及填充剂和药物的填充性能,因此可以用作硫化橡胶或其他硫化橡胶的反应助剂。此外,本发明的热塑性弹性体组合物含有其他热塑性弹性体和上述 1,2-聚丁二烯,在模塑时,可表现出良好的可模塑性、模塑品外观和抗划伤性。