Title:
OPTICAL RECORDING MEDIUM
Document Type and Number:
Japanese Patent JP2674393
Kind Code:
B2
Abstract:
PURPOSE: To record information through a brand-new mechanism utilizing chromic resin which develops a color upon irradiation with ultrasonic ray and decolors upon heating.
CONSTITUTION: The optical recording medium comprises a recording layer composed of a chromic resin containing structural unit wherein two nitrogen atoms are bonded directly to one aromatic ring at the farthest position thereof and an alkylene group is bonded to at least a part of the nitrogen atom so that the two nitrogen atoms are subjected to tertiary substitution. The resin can be produced through reaction of an epoxy resin, paraphenylenediamine and 2,6-naphthalenediamine wherein coloring and decoloring are realized by means of halogen and cation radical stabilizer. Coloring and decoloring properties are utilized for recording of information. Since a chromic resin is employed, contrast is enhanced between coloring and decoloring resulting in a highly sensitive optical recording medium.
Inventors:
Takeuchi Kazumasa
Yasuo Miyadera
Takashi Yamadera
Ritsuko Obata
Yasuo Miyadera
Takashi Yamadera
Ritsuko Obata
Application Number:
JP31453091A
Publication Date:
November 12, 1997
Filing Date:
November 28, 1991
Export Citation:
Assignee:
Hitachi Chemical Co., Ltd.
International Classes:
B41M5/26; G03C1/73; G11B7/24; G11B7/244; (IPC1-7): G03C1/73; G11B7/24
Domestic Patent References:
| JP55021A |
Attorney, Agent or Firm:
Kunihiko Wakabayashi
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