| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly magnetic power-packed fluorine rubber composition which can effectively be used as bond magnet, etc., for sensors by using a polyol vulcanization-based fluorine rubber as a binder. SOLUTION: The fluorine rubber composition is obtained by adding 200-500 pts.wt. polyol vulcanization-based fluorine rubber having 8-15 Mooney viscosity ML<SB>1+10</SB>(at 121°C). Since the fluorine rubber composition enables high filling content of magnetic powder by selecting the polyol vulcanization-based fluorine rubber having ultra-low Mooney viscosity ML<SB>1+10</SB>(at 121°C), the rubber composition is excellent in viewpoint of magnetic characteristics. In the resin composition, magnetic characteristics which are compatible with those obtained when the rubber composition uses NBR as binder can be obtained by packing magnetic powder in half quality of a quality required when using NBR as binder and the magnetic characteristics exhibit heat resistance entirely not impaired even at high temperature, e.g. 230°C. Therefore, the rubber composition can effectively used as a bond magnet for sensors used as magnetic encoder, etc., e.g. as rubber magnet for encoder in a part around an engine. COPYRIGHT: (C)2008,JPO&INPIT |
