| 摘要 |
<p>The present invention provides magnetic recording media comprising a magnetic layer and optionally a backside coating provided on a substrate. At least one of the magnetic layer and the optional backside coating comprises a polymeric binder, wherein the polymeric binder is an electron beam radiation cross-linked matrix of ingredients comprising a binder polymer component and a polymeric radiation cross-linking agent. The polymeric radiation cross-linking agent comprises a plurality of (meth)acrylate-functional chain segments of formula (I), wherein B1 is a segment of the polymer backbone, X1 is a single bond or a divalent organic linking group, n has a value in the range from 2 to 6, and R9 is H or -CH¿3?. The polymeric radiation cross-linking agent has a molecular weight of at least 4000 and has sufficiently high molecular flexibility to effectively cross-link the polymeric binder upon exposure of the polymeric radiation cross-linking agent to electron beam radiation.</p> |
