公开(公告)号：JPH0725525B2

公开(公告)日：1995-03-22

申请号：JP2629784

申请日：1984-02-14

Applicant: KAO CORP

Inventor： YAMAUCHI MICHIHIDE ,  KISHINE NOBUYUKI ,  IMAMURA TETSUYA

IPC: G11B5/31 ,  C01B31/02 ,  C04B35/52 ,  G11B5/187 ,  G11B5/60 ,  H01F10/26 ,  H01F10/28

公开(公告)号：JPH0757249A

公开(公告)日：1995-03-03

申请号：JP19963793

申请日：1993-08-11

Applicant: KAO CORP

Inventor： KISHINE NOBUYUKI ,  IMAMURA TETSUYA ,  KOBAYASHI TOSHIO

IPC: G11B5/78 ,  C09D5/23 ,  G11B5/64 ,  G11B5/73 ,  G11B5/738

Abstract: PURPOSE:To improve the durability of a tape by regulating the modulus of elasticity of the tape in the longitudinal direction to a prescribed value, that in the transverse direction to a prescribed value and the total thickness of the tape to

公开(公告)号：JPH0625871B2

公开(公告)日：1994-04-06

申请号：JP7532183

申请日：1983-04-28

Applicant: KAO CORP

Inventor： IMAMURA TETSUYA ,  TAKEUCHI SETSU ,  TETSUYA TAKASHI ,  YASUDA SHINICHIRO

IPC: G03G9/08 ,  G03G9/083 ,  G03G9/097

公开(公告)号：JPH0556566B2

公开(公告)日：1993-08-19

申请号：JP28235485

申请日：1985-12-16

Applicant: KAO CORP

Inventor： KANAI HIROYUKI ,  IMAMURA TETSUYA ,  TAKEUCHI SETSU ,  SUZUE SHIGETOSHI

IPC: G11B5/708 ,  C09D5/23 ,  C09D7/12 ,  C10M105/32 ,  C10N40/18

公开(公告)号：JPH0370315B2

公开(公告)日：1991-11-07

申请号：JP5829583

申请日：1983-04-01

Applicant: KAO CORP

Inventor： KISHINE NOBUYUKI ,  IMAMURA TETSUYA ,  TAKEUCHI SETSU ,  YAMAUCHI MICHIHIDE

IPC: G11B23/033 ,  G11B23/02 ,  G11B23/03

公开(公告)号：JPS6412313B2

公开(公告)日：1989-02-28

申请号：JP7178681

申请日：1981-05-13

Applicant: KAO CORP

Inventor： TODA SHOICHI ,  IMAMURA TETSUYA

IPC: C09G1/00 ,  C09G1/12

公开(公告)号：JPS64321B2

公开(公告)日：1989-01-06

申请号：JP3970983

申请日：1983-03-09

Applicant: KAO CORP

Inventor： YAMAUCHI MICHIHIDE ,  KISHINE NOBUYUKI ,  IMAMURA TETSUYA

IPC: C04B35/52 ,  C01B31/02

公开(公告)号：JPS6256572B2

公开(公告)日：1987-11-26

申请号：JP18877982

申请日：1982-10-27

Applicant: KAO CORP

Inventor： TAKEUCHI SETSU ,  KOBAYASHI SHOJI ,  OOTANI TAKESHI ,  IMAMURA TETSUYA

IPC: C09D5/23 ,  C09D7/12 ,  G11B5/712 ,  H01F1/032

公开(公告)号：JPS6278156A

公开(公告)日：1987-04-10

申请号：JP21833085

申请日：1985-09-30

Applicant: KAO CORP

Inventor： WAKASA MASANOBU ,  YAMAUCHI MICHIHIDE ,  IMAMURA TETSUYA ,  KISHINE NOBUYUKI

IPC: C04B35/52

公开(公告)号：JPS6253885A

公开(公告)日：1987-03-09

申请号：JP19346985

申请日：1985-09-02

Applicant: KAO CORP

Inventor： KISHINE NOBUYUKI ,  ISHIKAWA AKIRA ,  IMAMURA TETSUYA ,  TAKEUCHI SETSU

IPC: B41M5/26 ,  G11B7/24 ,  G11B7/244

Abstract: PURPOSE:To provide an optical recording medium capable of high-density recording, free of toxicity and having excellent stability, by using a specified condensed polycyclic aromatic compound the transmittance of which is greatly changed by irradiation with rays, as a main constituent of a recording layer. CONSTITUTION:A condensed polycyclic aromatic compound having a basic skeleton of formula (1), preferably, tetrabenzopentacene, is used. Also, tetrabenzopentaphene, 5.6.11.12-tetraphenylnaphthacene or the like may be used. Each of these compounds has an absorption band at wavelengths of 400-800nm, and when being irradiated with rays in the band, it reacts with oxygen to be a peroxide which does not absorb rays in the band. A thin film of the condensed polycyclic aromatic compound is provided on a base, whereby the optical recording medium is obtained. The base 1 if formed from an organic resin material such as an acrylic resin and a polycarbonate resin, a glass, quartz, a ceramic or the like.