Method for molding magnets and compositions for use therein
AssigneeGeneral Electric Company
InventorsJohn W. Carbone, James Day, Michael L. Todt
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Abstract
Blends of metallic, preferably ferromagnetic, particles, macrocyclic oligomer compositions, especially poly(alkylene dicarboxylate) oligomers, and catalysts/initiators for polymerization of said macrocyclic oligomers are molded into magnets having high metal loadings, typically about 60-85% by volume. Compression molding of such blends can be conducted at relatively low pressures.
Claims9
A method for producing a permanent magnet which comprises intimately blending ferromagnetic metallic particles with at least one macrocyclic condensation oligomer composition in the solid state and with macrocyclic oligomer polymerization catalysts and initiators in amounts effective to convert said oligomer composition to a linear polymer, to form a solid mixture in which the proportion of said metallic particles is at least about 60% by volume, and compression molding said mixture at a temperature and pressure effective to convert said oligomer composition to a linear polymer.
Dependencies are inferred from the claim text.