METHOD FOR JUDGING WHETHER THERMOSETTING EPOXY RESIN IS SUITED FOR MANUFACTURE OF MAGNET BONDED BODY

摘要

PPROBLEM TO BE SOLVED: To provide a method for judging simply and accurately whether or not a thermosetting epoxy resin is suited for the manufacture of a magnet bonded body that is incorporated into a motor for automobile and the like. PSOLUTION: This method comprises measuring the dynamic viscoelasticity of a heat cured resin and judging that the resin is suitable if all the requirements (a)-(c) mentioned below are satisfied: (a) the storage modulus at 120°C is ≥500 MPa; (b) the phase difference tanδ of the dynamic viscoelasticity at -40°C is ≥0.033; and (c) the integrated value of tanδin the range of -40°C to 50°C is ≥2.00. PCOPYRIGHT: (C)2005,JPO&NCIPI