Protective covering for magnetic recording medium

Details Protective covering for magnetic recording medium Protective covering for magnetic recording medium

G - Physics

11

B

117/24.2, 204/91

G11B 5/72 (2006.01) B05D 1/36 (2006.01) B05D 3/06 (2006.01) B05D 5/08 (2006.01) G11B 5/725 (2006.01)

Patent

CA 1199234

Abstract Magnetic recording medium protected by an ultra-thin, composite low surface energy covering provided by an inner layer of insoluble polymer and an outer layer of insoluble polymer which are made by in situ polymerization. The inner layer is made from two monomers such as a hydantoin hexacrylate and alpha-methyl styrene. The outer layer is made from polymerizable perfluoro- polyether monomer having ethylenicaly unsaturated polymerizable groups. The composite low surface energy covering is especially useful for providing lubricity and corrosion resistance to a metallic thin-film magnetic recording coating.

428847

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