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Title:
MAGNETIC RECORDING MEDIUM
Document Type and Number:
Japanese Patent JPS5829144
Kind Code:
A
Abstract:

PURPOSE: To obtain a magnetic recording medium having superior magnetic characteristcs and superior surface smoothness of the magnetic layer and contg. magnetic powder with high dispersibility and fillability by hardening a coated film contg. a specified coupling agent and a specifiec oligomer under radiation so as to produce the magnetic layer.

CONSTITUTION: A coated film contg. a titanium coupling agent represented by the general formula, an oligomer obtd. by bonding acrylic acid or methacrylic acid to both the terminals of the condensation product of bisphenol-A with an alkylene glycol polymer by esterification, and magnetic powder, is formed on a substrate and hardened by irradiation to produce a magnetic layer. The preferred amount of the coupling agent to be used is 0.1W10wt% of the amount of the magnetic powder in the magnetic layer, and that of the oligomer to be used is 20W60wt% of the total amount of the powder and the coupling agent.


Inventors:
YAMAGUCHI ATSUTAKA
YASUI MASAAKI
Application Number:
JP12802581A
Publication Date:
February 21, 1983
Filing Date:
August 15, 1981
Export Citation:
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Assignee:
HITACHI MAXELL
International Classes:
C09D5/23; C09D171/00; C10M105/38; C10M139/00; G11B5/702; G11B5/708; C10N10/08; C10N40/18; C10N70/00; (IPC1-7): G11B5/70
Attorney, Agent or Firm:
Takaoka Kazuharu



 
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