| 摘要 |
<p>The present invention has for its object to provide an ester elastomer having a high block of the hard and soft segment components, high flexibility, and good mechanical properties at high temperature, particularly high temperature creep resistance and a process for producing said ester elastomer. The present invention relates to an ester elastomer which is a block copolymer comprising a polyester copolymer (A) and a polymer having hydroxyl groups at both terminal ends (B) coupled to each other through the intermediary of a urethane component (C) consisting in a group of the general formula (1): -O-CO-NH-R1-NH-CO-O-, (wherein R1 represents an alkylene group containing 2 to 15 carbon atoms, -C¿6?H4-, -C6H4-CH2-, -C6H4-CH2-C6H4- (where -C6H4- represents phenylene)) or a group of the general formula (2): -O-CO-NH-R?2¿-NH-CO- (wherein R2 represents an alkylene group containing 2 to 15 carbon atoms, -C¿6?H4-, -C6H4-CH2- or C6H4-CH2-C6H4- (wherein -C6H4- represents phenylene)).</p> |
