| 摘要 |
<p>Electron beam curable polyurethane resin comprising the reaction product of a hydroxyl terminated polyester; a compound having ethylenic unsaturation and at least 2 hydroxyl moieties; optionally, a chain extender which is a lower aliphatic or cycloaliphatic diol; and an approximately stoichiometric proportion of an aliphatic, cycloaliphatic, or aromatic diisocyanate. The ethylenically unsaturated component has an essentially aliphatic backbone, and optionally can include carbamate linkages. Magnetic coatings incorporating these resins are adapted to be applied to a substrate, calendared, then crosslinked by exposure to electron beam radiation. Magnetic media made with such coatings are also disclosed. The present resins, and coatings made from them, have superior properties to other coatings of this type.</p> |
