| 摘要 |
<p>PURPOSE:To obtain a magnetic recording material with superior electromagnetic converting characteristics, runnability and durability by adding a specified branched satd. fatty acid to a magnetic layer. CONSTITUTION:To a magnetic layer composed of a binder and ferromagnetic fine powder is added >=12 C branched satd. fatty acid having <=20 deg.C m.p. such as branched lauric acid, branched myristic acid, branched stearic acid or other fatty acid having a branched alkyl group. The preferred amount of the added fatty acid is 0.1- about 10wt%, especially 0.5-5wt% basing on the amount of the fine powder. Said binder, ferromagnetic fine powder, branched fatty acid and additives are dispersed in an org. solvent, and the resulting magnetic coating is applied to a support and dried to manufacture a magnetic recording material.</p> |
