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Title:
MAGNETIC RECORDING MEDIUM
Document Type and Number:
Japanese Patent JPS56134320
Kind Code:
A
Abstract:

PURPOSE: To obtain a magnetic recording medium which is low in dynamical friction characteristic, excellent in surface characteristic and also satisfactory in high- pass sensitivity, by using a magnetic paint containing a hardening agent, to which glyceride and phosphoric acid ester have been added.

CONSTITUTION: Glyceride and phosphoric acid ester are used together and are further added to a magnetic paint which has mixed magnetic powder (example: γ-Fe2O3), a binder (example: polyurethane resin, vinylidene chloride-vinyl chloride copolymer, etc.), and a hardening agent, and a magnetic paint which has been obtained in this way is applied and stuck on the supporting body, and a magnetic recording medium is formed. As for said magnetic paint, since a hardening reaction by a hardening agent is made slow, a magnetic layer applied film whose surface characteristic is satisfactory can be obtained even if it is used after a long time has passed after preparation, and also since a dispersion property of magnetic powder in the paint is satisfactory, a magnetic layer whose high-pass sensitivity is satisfactory can be formed.


Inventors:
NISHIMATSU MASAHARU
Application Number:
JP3806380A
Publication Date:
October 21, 1981
Filing Date:
March 24, 1980
Export Citation:
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Assignee:
TDK ELECTRONICS CO LTD
International Classes:
G11B5/708; C09D5/23; C09D7/12; G11B5/71; (IPC1-7): G11B5/70



 
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