| 摘要 |
PURPOSE:To enhance electromagnetic conversion characteristics and magnetic characteristics, by coating magnetic powder with an organosilicon polymer having mol.wt. in a specified range and uniformly dispersing it. CONSTITUTION:The magnetic powder is coated with an organosilicon polymer having 500-8,000, preferably, 1,000-6,000mol.wt. This polymer is a vinyl type polymer contg. silyl groups, composed of a copolymer consisting of at least one kind of monovinyl monomer and at least one kind of divinyl monomer as its main chain, and contains silicon groups added to the terminals or side chains of the main chain, combined with the hydrolyzed groups. |
