Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yoshiaki Takeuchi0
Kazuhisa Kajihara0
Date of Patent
March 31, 2009
0Patent Application Number
108925990
Date Filed
July 16, 2004
0Patent Primary Examiner
Patent abstract
A coating composition, a method for producing the coating composition, a coating film and magnetic recording medium are described. The coating composition comprises a binder, a solvent, and an α-alumina powder, wherein the α-alumina powder satisfies the following (a) and (b):(a) when the α-alumina powder is pressed to obtain a green body and the green body is sintered at 1250° C. under the atmospheric pressure, a relative density of the obtained sintered body is about 80% or more, and(b) a BET specific surface area of the α-alumina powder is about 10 m2/g or more.
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