MAGNETIC RECORDING MEDIUM

Title:

MAGNETIC RECORDING MEDIUM

Document Type and Number:

WIPO Patent Application WO/1994/027290

Kind Code:

A1

Abstract:

A magnetic recording medium having a magnetic layer on one surface of a nonmagnetic support and a back coat layer on the other surface, wherein the back coat layer contains two kinds of carbon black having different average particle sizes and a binder containing two kinds of copolymer. One of the copolymers is copolymer A comprising vinyl chloride, alkylcarboxylic acid/vinyl ester and vinyl alcohol and having an average degree of polymerisation of 300 to 600, and the other is copolymer B further containing an amino group and having an average degree of polymerisation of 200 to 800. The present invention accomplishes a magnetic recording medium having a back coat layer having an excellent surface property, high electromagnetic conversion characteristics, high travel stability and high travel durability.

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Inventors:

KUROSE SHIGEO
HONJO YOSHIHIRO
SOMIYA AKIRA

Application Number:

PCT/JP1994/000711

Publication Date:

November 24, 1994

Filing Date:

April 27, 1994

Export Citation:

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Assignee:

TDK CORP (JP)

International Classes:

C08F214/06; C08F16/02; C08F214/00; C08F216/06; C09D5/23; C09D127/04; C09D127/06; C09D129/04; C09D131/02; G11B5/73; G11B5/735; (IPC1-7): G11B5/704

Foreign References:

JPS6045937A	1985-03-12
JPS6045938A	1985-03-12
JPH0481256B2	1992-12-22
US4582757A	1986-04-15

Other References: