Compound for bonded magnet, bonded magnet, method of producing same, and resin composition for bonded magnets
AssigneeNichia Corporation
InventorsSatoshi Yamanaka, Takayuki Yano, Shuichi Tada, Masahiro Abe, Kenta Iwai
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Abstract
A method of producing a compound for bonded magnets, the method including: heat-curing a thermosetting resin and a curing agent having a ratio of the number of reactive groups of the curing agent to the number of reactive groups of the thermosetting resin of at least 2 but not higher than 11 to obtain an additive for bonded magnets; and kneading the additive for bonded magnets, magnetic powder, and a thermoplastic resin to obtain a compound for bonded magnets in which a filling ratio of the magnetic powder is at least 91.5% by mass.
Claims13
A compound for thermoplastic resin-containing bonded magnets, comprising
- an additive for thermoplastic resin-containing bonded magnets, wherein the additive for thermoplastic resin-containing bonded magnets is a cured product of a thermosetting resin and a curing agent having a ratio of a number of reactive groups of the curing agent to a number of reactive groups of the thermosetting resin of at least 2 but not higher than 11;
- magnetic powder;
- and
- a thermoplastic resin,
- wherein a filling ratio of the magnetic powder is at least 91.5% by mass.
A resin composition for thermoplastic resin-containing bonded magnets, comprising
- a cured product of a thermosetting resin and a curing agent having a ratio of a number of reactive groups of the curing agent to a number of reactive groups of the thermosetting resin of at least 2 but not higher than 11;
- and
- a thermoplastic resin.
A resin composition for thermoplastic resin-containing bonded magnets, comprising
- a melt-kneaded mixture of a thermoplastic resin with a cured product of a thermosetting resin and a curing agent having a ratio of a number of reactive groups of the curing agent to a number of reactive groups of the thermosetting resin of at least 2 but not higher than 11.
Dependencies are inferred from the claim text.