Overcoat for optical recording media

Details Overcoat for optical recording media Overcoat for optical recording media

B - Operations, Transporting

05

D

204/91.4

B05D 3/06 (2006.01) B05D 5/00 (2006.01) G11B 7/24 (2006.01) G11B 7/254 (2006.01) G11C 13/04 (2006.01)

Patent

CA 1267379

ABSTRACT OF THE DISCLOSURE IMPROVED OVERCOAT FOR OPTICAL RECORDING MEDIA This disclosure concerns protective overcoatings for an information storage record which includes an information-layer adapted for optical data recording. The protective overcoatings are transparent to recording radiation and especially adapted to enhance service life and recording characteristics. A typical coating comprises the polymerization product of a formulation including at least one "bulk resin" (e.g., an acrylamide or an acrylate monomer or pre-polymer), plus an associated non-yellowing photo-initiator, and a non-yellowing adhesion-promoter. Once applied, this coating is cured by exposure to UV radiation so as to cure it without heating it significantly so that said radiation functions as the sole or principal polymerizing agent, acting quickly, and with little or no supplemental heat, and without extended "tackiness". This formulation will readily "level" to enable the desired coating to serve as a mechanical/chemical barrier.

463654

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