MAGNETIC COMPOSITE BODY FOR ANTENNA AND ANTENNA ELEMENT USING SAME

摘要

A graft copolymer (P) is obtained by graft-polymerizing 18-67 parts by mass of a monomer (B) to 100 parts by mass of a polymer (A).  The polymer (A) is obtained by polymerizing an a-olefin, a conjugated diene, an unsaturated cyclic hydrocarbon or an ethylenically unsaturated bond-containing aromatic monomer.  The monomer (B) is composed of an aromatic monofunctional ethylenically unsaturated monomer (b1) and a bifunctional ethylenically unsaturated monomer (b2), and the mass ratio (b1)/(b2) is within the range from 70/30 to 95/5.  A magnetic composite body for an antenna is obtained by kneading a composition which contains the graft copolymer (P) and a spinel ferrite powder (F) having an average particle diameter of 0.05-20 µm at a mass ratio (P)/(F) of from 10/90 to 60/40.