| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermoplastic polyurethane manufacturing process which uses a high melting point macro-polyol, a high melting point chain extending agent, and a slowly reacting polyisocyanate, can reduce the amount of a catalyst for manufacturing, generates less gelatinized substance and burning, can manufacture a thermoplastic polyurethane having less decrease in physical properties and deterioration with time and a thermoplastic polyurethane having low hardness, to provide a thermoplastic polyurethane manufacturing apparatus to carry out this thermoplastic polyurethane manufacturing process and to provide a thermoplastic polyurethane obtained by this thermoplastic polyurethane manufacturing process. SOLUTION: A polyisocyanate and a macro-polyol are mixed by a high speed stirrer 9. During this process or after this process, a chain extending agent is added to the obtained mixture to obtain a reaction raw material. Then, the reaction raw material is passed through two or more static mixers 17 in a static mixer part 4 to cause the reaction. COPYRIGHT: (C)2004,JPO&NCIPI
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