Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – With liberating or forming of particles
Patent
1990-12-26
1992-03-31
Dawson, Robert A.
Plastic and nonmetallic article shaping or treating: processes
Forming articles by uniting randomly associated particles
With liberating or forming of particles
264109, 419 35, B29C 4300
Patent
active
051006049
ABSTRACT:
A method for making a resin-bonded magnet of flaky pieces of a ferromagnetic alloy and a resin composition which comprises providing composite granules obtained from a mixture of magnetically isotropic pieces of an Fe-B-R alloy, in which R is Nd and/or Pr, in the form of fine pieces and a resin composition comprised of at least one film-forming polymer having a functional group reactive with isocyanate groups and a blocked isocyanate. The granules are compression molded to obtain a green compact and subsequently thermally treated to allow reaction between the at least one film-forming polymer and the isocyanate by dissociation of the blocking groups by heating, thereby obtaining a resin-bonded magnet.
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Kunststoff-Taschenbuch, 22nd edition, Carl-Hanser Verlag, Munich 1983, pp. 379-388.
Kitayama Shuichi
Wada Masami
Yamashita Fumitoshi
Dawson Robert A.
Kuhns Allan R.
Matsushita Electric - Industrial Co., Ltd.
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