JPS6487622A - Polycarbonate copolymer - Google Patents

Polycarbonate copolymer

Info

Publication number
JPS6487622A
JPS6487622A JP62242472A JP24247287A JPS6487622A JP S6487622 A JPS6487622 A JP S6487622A JP 62242472 A JP62242472 A JP 62242472A JP 24247287 A JP24247287 A JP 24247287A JP S6487622 A JPS6487622 A JP S6487622A
Authority
JP
Japan
Prior art keywords
laser beam
copolymer
recurring units
units expressed
polycarbonate copolymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP62242472A
Other languages
Japanese (ja)
Other versions
JP2565718B2 (en
Inventor
Ikuo Takahashi
Tatsuya Sugano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daicel Corp
Original Assignee
Daicel Chemical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daicel Chemical Industries Ltd filed Critical Daicel Chemical Industries Ltd
Priority to JP62242472A priority Critical patent/JP2565718B2/en
Publication of JPS6487622A publication Critical patent/JPS6487622A/en
Application granted granted Critical
Publication of JP2565718B2 publication Critical patent/JP2565718B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
    • G11B7/2533—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins
    • G11B7/2534—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins polycarbonates [PC]

Landscapes

  • Polyesters Or Polycarbonates (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

PURPOSE:To obtain the titled copolymer for optical information recording and disc, consisting of specific two kind of recurring units, having excellent heat resistance and transparency and capable of recording signals by laser beam or carrying out readout of signals recorded by reflection and permeation of laser beam. CONSTITUTION:The aimed copolymer having recurring units expressed by formula I and II, molar ratio of units expressed by formulas I and II of 1:99-99:1 and preferably 13,000-50,000 viscometric average molecular weight and obtained by subjecting 99-1mol.% 1,1-bis(4-hydroxy-3-tert.-butylphenyl)-1-phenylethane to carbonate binding with 1-99mol.% bisphenol AP.
JP62242472A 1987-09-29 1987-09-29 Polycarbonate copolymer Expired - Lifetime JP2565718B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62242472A JP2565718B2 (en) 1987-09-29 1987-09-29 Polycarbonate copolymer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62242472A JP2565718B2 (en) 1987-09-29 1987-09-29 Polycarbonate copolymer

Publications (2)

Publication Number Publication Date
JPS6487622A true JPS6487622A (en) 1989-03-31
JP2565718B2 JP2565718B2 (en) 1996-12-18

Family

ID=17089593

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62242472A Expired - Lifetime JP2565718B2 (en) 1987-09-29 1987-09-29 Polycarbonate copolymer

Country Status (1)

Country Link
JP (1) JP2565718B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01178519A (en) * 1988-01-11 1989-07-14 Daicel Chem Ind Ltd Resin for optical material

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6368632A (en) * 1986-09-10 1988-03-28 Idemitsu Kosan Co Ltd Novel polymer and its production

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6368632A (en) * 1986-09-10 1988-03-28 Idemitsu Kosan Co Ltd Novel polymer and its production

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01178519A (en) * 1988-01-11 1989-07-14 Daicel Chem Ind Ltd Resin for optical material

Also Published As

Publication number Publication date
JP2565718B2 (en) 1996-12-18

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