| US 7,601,395 B2 | ||
| Magnetic recording medium and method for manufacturing the same | ||
| Takayoshi Kuwajima, Tokyo (Japan); and Sadafumi Iijima, Tokyo (Japan) | ||
| Assigned to TDK Corporation, Tokyo (Japan) | ||
| Filed on Jan. 11, 2005, as Appl. No. 11/32,080. | ||
| Claims priority of application No. 2004-005884 (JP), filed on Jan. 13, 2004. | ||
| Prior Publication US 2005/0208342 A1, Sep. 22, 2005 | ||
| Int. Cl. B05D 3/02 (2006.01) | ||
| U.S. Cl. 427—372.2 [427/127; 427/128; 427/130] | 11 Claims |
| 1. A method for manufacturing a magnetic recording medium comprising at least one magnetic layer on one surface of a non-magnetic
support, comprising:
(a) applying a magnetic paint to the non-magnetic support, wherein the magnetic paint comprises:
a magnetic powder;
binder resins, comprising at least: a vinyl chloride resin having a degree of polymerization of at least 270 and an aliphatic
polyester polyurethane resin;
an aromatic compound selected from the group consisting of phthalic acid, isophthalic acid, terephthalic acid, benzoic acid,
phenylphosphonic acid, and benzenesulfinic acid; and
a phosphoric acid ester having a number average molecular weight of from 500 to 2000;
and
(b) regulating the concentration of the magnetic paint during the application in (a) to be 2.0 percent by weight or less in
terms of a ratio of the binder resins to a total sum of the binder resins and a solvent.
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