Patent ID: 6641919
Filing Date: 2003-11-04
Classification: H01F,Y10S,Y10T

Abstract:
A resin-bonded type magnet prepared by molding a composition comprising a magnetic powder and resin binder using injection molding, injection compression molding or transfer molding, said magnet powder having an anisotropic magnetic field (HA) of 50 KOe or more, and said resin binder including at least one unsaturated polyester resin hardened material as a major component and containing a peroxide, or a reaction product thereof, that can be hardened at a temperature of 150Â° C. or lower said composition having a viscosity at a molding temperature, as measured by a rotational viscometer, in a mixed and conditioned state before adding the magnetic powder, of from 100 mPaÂ·s to 5,000 mPaÂ·s.