| 摘要 |
<p>The invention relates to a magnetic recording medium, for example a magnetic tape, which comprises a carrier and a magnetizable coating provided thereon which comprises a binder as well as a magnetic pigment dispersed in the binder by means of a dispersing agent. As a dispersing agent is used an N-acylsarcosine derivative. Herewith an optimum dispersion of the pigment in the binder is obtained in a short dispersion time. An excess of dispersing agent serves as a lubricant upon migration. The acyl group comprises preferably an aliphatic or olefinic hydrocarbon chain having 12-22 carbon atoms. Furthermore are to be preferred salts of N-acrylsarcosine, in particular metal salts, alkali metal salts, alkaline earth metal salts and amine salts.</p> |
