| 摘要 |
PURPOSE:To obtain a resin composition of high thermal stability and good magnetic properties, suitable for rotary equipment such as small-sized precision motor, etc., by incorporating specific polyester with specified amount of rare earth metal-contg. magnetic powder of specific particle size. CONSTITUTION:The objective composition can be obtained by incorporating (A) 75-20vol% of a polyester from 4-10C glycol (e.g., 1,4-butanediol) and 4-22C aromatic and/or aliphatic dicarboxylic acid(s) (e.g., terephthalic acid, adipic acid) (e.g., polytetramethylene terephthalate) with (B) 25-80vol% of rare earth metal-contg. magnetic powder of an average particle size 0.05-500(pref. 0.1-10)mum (e.g., samarium-cobalt alloy). |
