Patent ID: 7147906
Filing Date: 2006-12-12
Classification: C08G,G11B,Y10S,Y10T

Abstract:
1. A storage medium for data, the storage medium comprising: a) a substrate, a physical portion of which comprises at least one polyimide, and b) at least one data layer on the substrate; wherein said polyimide has a mechanical damping coefficient of at least about 0.028 at a temperature of about 50° C. at a frequency of about 1.6 hertz; and wherein the at least one polyimide comprising structural units of the formula: or mixtures of the foregoing structural units; wherein “D” is a divalent aromatic group, R3 and R10–R12 are independently selected from hydrogen, halogen, and C1–C6 alkyl groups; “q” is an integer having a value of 1 up to the number of positions available on the aromatic ring for substitution; “W” is a linking group; and wherein B comprises a divalent organic radical selected from aromatic hydrocarbon radicals having 6 to about 30 carbon atoms and substituted derivatives thereof.