Magnetic recording medium having a perfluoropolyether...

Details Magnetic recording medium having a perfluoropolyether... Magnetic recording medium having a perfluoropolyether...

C - Chemistry, Metallurgy

08

F

117/149, 117/24.

C08F 299/02 (2006.01) C09D 171/02 (2006.01) G11B 5/725 (2006.01)

Patent

CA 1225546

33425 CAN 6A MAGNETIC RECORDING MEDIUM HAVING A PERFLURORPOLYETHER POLYMER PROTECTIVE COATING Abstract of the Disclosure A magnetic recording medium protected by a very thin, composite low surface energy covering is disclosed. The covering comprises a primer layer of a polymerized phosphorylated monomer or oligomer and an outer lubricant layer of perfluoropolyether polymer. The two layers may be polymerized in situ. The primer layer is made from monomers such as phosphorylated bis[4?methacryloyloxyhy droxypropylcarbamato?cyclohexyl]methane. The outer layer is made from a polymerizable perfluoropolyether monomer such as Image The composite low surface energy covering is especially useful for providing lubricity and corrosion resistance to a metallic thin-film magnetic recording coating.

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