| 摘要 |
PROBLEM TO BE SOLVED: To provide a water hosepipe which has the same mechanical characteristics as those of a vulcanized rubber which is obtained by using a conventional ethylene/α-olefin non-conjugated diene copolymer rubber with maintaining an excellent balance between the residual compressional stress ratio available as an index of the shape retentive characteristics and the BIT available as the blendability. SOLUTION: The water hosepipe can be obtained by using an ethylene/α-olefin non-conjugated diene copolymer rubber which has a ratio of Az/An in the range of 20-30, with a Z-average molecular chain length (Az) and a number-average molecular chain length (An) being measured by a gel-permeation chromatography (GPC), which has a ratio of Aw (an weight-average molecular chain length)/An of 5 or larger, with the ratio being an index of a molecular weight distribution, which has a molecular-weight distribution structure with a single or double peaks having the peaks in the range of 3.8<Log Aw<4.5, and which has a viscosity measured by an ML viscometer in the range of 60<ML<SB>1+4'</SB>121°C<160. COPYRIGHT: (C)2005,JPO&NCIPI
|
