| 摘要 |
A thermoplastic polyester elastomer having a crystalline melting point which satisfies the relationship: y>=200+0.5x, a Vicat softening point which satisfies the relationship: z>=50+1.5x, and a tensile elongation of at least 100% which is measured according to JIS K 6251, in which x is a weight percentage of polymeric units which substantially constitute hard segments of the elastomer; y is a crystalline melting point (°C.); and z is a Vicat softening point (°C.), which elastomer has a high melting point, while it has good heat resistance, water resistance and weather resistance.
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