| 摘要 |
<p>PURPOSE:To improve a dispersion property and abrasion resistance, by using a bonding material constituting a magnetic layer, which contains a cellulose derivative having a residual OH group of prescribed %, synthetic rubber and a polyisocyanate compound. CONSTITUTION:A magnetic tape is prepared by coat-sticking a magnetic coating material which has used as a bonding material a cellulose derivative whose residual OH group is 7.5-40%, diolefin or olefin synthetic rubber and a polyisocyanate compound, on a non-magnetic supporting body. As the cellulose derivatives, nitrocellulose, cellulose acetate butylate, etc. are used, and as the polyisocyanate compounds, aliphatic, cycloaliphatic and aromatic di-, tri- and tetraisocyanate having at least 2 isocyanate groups are used. According to such a constitution, it is possible to obtain a magnetic tape having a magnetic layer which is excellent in its dispersion property and abrasion resistance.</p> |
