Resin-bonded magnet comprising a specific type of ferromagnetic powder dispersed in a specific type of resin binder
US4689163A · kind A · utility
30Cited by
7References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1986 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Dec 3, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A resin-bonded magnet comprising particles of a melt-quenched ferromagnetic material of the formula, Fe-B-R, in which R represents Nd and/or Pr, and a binder resin dispersing the particles throughout the resin and fixing the particles. The binder resin comprises an oligomer having at least an alcoholic hydroxyl group and a block isocyanate with an active hydrogen-bearing compound. The resin-bonded magnet is preferably used in the from of a cylinder, ring or column having a defined outer diameter and a defined density when applied to permanent magnet motors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.