| 摘要 |
<p>A magnetic coating composition in which magnetic iron oxide particles are dispersed into a solution of three components, which upon evaporation of the solvent and curing with elevated temperatures, results in a very smooth durable polymer coating having the magnetic particles dispersed uniformly therein. The three components in solution are an epoxy resin having an epoxide equivalent weight of approximately 400 or above, a polyamine whch has a minimum of one primary amine group and a cellulose acetate butyrate resin which has approximately 17 weight % butyral content or above. The polyamine, which acts as a catalyst to crosslink the composition, can be substituted for by hydroxyl compounds, a preferred one being formic acid (HCOOH) - an organic acid.</p> |
