Patent ID: 11862372
Assignee: NICHIA CORPORATION
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 6:
7. A method of manufacturing a composition for bonded magnets, the method comprising:
introducing a rare earth-iron-nitrogen-based magnetic powder and an acid-modified polypropylene resin in a kneading machine,
kneading the rare earth-iron-nitrogen-based magnetic powder and the acid-modified polypropylene resin to obtain a first kneaded mixture; and
introducing a first polypropylene resin and an amorphous resin having a glass transition temperature of 120° C. or higher and 250° C. or lower in the kneading machine; and
kneading the first kneaded mixture, the first polypropylene resin and the amorphous resin to obtain a second kneaded mixture,
wherein, with respect to 100 parts by weight of the rare earth-iron-nitrogen-based magnetic powder, an amount of the acid-modified polypropylene resin is 3.5 parts by weight or greater and less than 10.4 parts by weight, and a total amount of the first polypropylene resin and the amorphous resin is 0.35 part by weight or greater and less than 3.88 parts by weight.