Patent ID: 8404141

Claim:
A rare earth bonded magnet produced such that a mixture, which comprises: a rare earth magnet powder; a resin binder comprising a thermosetting resin; an organic phosphorus compound; and a coupling agent, is compress-molded, heated and cured, wherein the organic phosphorus compound is an organophosphate ester compound defined by a formula below: where: R 1 and R 2 are an organic group of at least one kind including a hydrocarbon group; when R 1 and R 2 have two or more kinds of organic groups, the organic groups can be either identical to or different from one another; and the hydrocarbon group is one of an alkyl group and aryl group with a carbon number of 3 to 18 which can be either straight-chained, branched or cyclic in formation, and wherein the coupling agent is defined by a formula below: where: R 3 , R 4 and R 5 are an organic group of at least one kind including a hydrocarbon group; M is one element selected from Si, Ti and Zr; when R 3 , R 4 and R 5 have two or more kinds of organic groups, the organic groups can be either identical to or different from one another; n is an integer which corresponds to a number of coupling hands of M and which ranges from 1 to 3; and the hydrocarbon group is one of an alkyl group and aryl group with a carbon number of 3 to 18 which can be either straight-chained, branched or cyclic in formation.