CA2132710A1 - Flexible magnetic recording medium containing polybenzazole polymers - Google Patents

Flexible magnetic recording medium containing polybenzazole polymers

Info

Publication number
CA2132710A1
CA2132710A1 CA002132710A CA2132710A CA2132710A1 CA 2132710 A1 CA2132710 A1 CA 2132710A1 CA 002132710 A CA002132710 A CA 002132710A CA 2132710 A CA2132710 A CA 2132710A CA 2132710 A1 CA2132710 A1 CA 2132710A1
Authority
CA
Canada
Prior art keywords
substrate
film
recording medium
polymer
magnetizable
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.)
Abandoned
Application number
CA002132710A
Other languages
English (en)
French (fr)
Inventor
Donald J. Perettie
Timothy M. Mccarthy
Peter E. Pierini
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.)
Dow Chemical Co
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2132710A1 publication Critical patent/CA2132710A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
    • C08G73/22—Polybenzoxazoles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
    • C08G75/32—Polythiazoles; Polythiadiazoles
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73923—Organic polymer substrates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Magnetic Record Carriers (AREA)
CA002132710A 1992-03-24 1993-03-11 Flexible magnetic recording medium containing polybenzazole polymers Abandoned CA2132710A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US85704392A 1992-03-24 1992-03-24
US07/857,043 1992-03-24

Publications (1)

Publication Number Publication Date
CA2132710A1 true CA2132710A1 (en) 1993-09-30

Family

ID=25325052

Family Applications (2)

Application Number Title Priority Date Filing Date
CA002132710A Abandoned CA2132710A1 (en) 1992-03-24 1993-03-11 Flexible magnetic recording medium containing polybenzazole polymers
CA002132545A Abandoned CA2132545A1 (en) 1992-03-24 1993-03-11 Flexible magnetic recording medium containing polybenzazole polymers

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA002132545A Abandoned CA2132545A1 (en) 1992-03-24 1993-03-11 Flexible magnetic recording medium containing polybenzazole polymers

Country Status (6)

Country Link
EP (1) EP0632921A1 (zh)
JP (1) JPH07504291A (zh)
KR (2) KR950701116A (zh)
CA (2) CA2132710A1 (zh)
TW (2) TW240311B (zh)
WO (2) WO1993019461A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3669457B2 (ja) * 1996-03-19 2005-07-06 富士通株式会社 磁気記録媒体及びその製造方法
EP0927992A4 (en) * 1997-07-17 1999-09-15 Sony Corp MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING / REPRODUCING DEVICE COMPRISING SAME

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3449296A (en) * 1967-05-29 1969-06-10 Du Pont Polybenzoxazole film
JPS58122622A (ja) * 1982-01-18 1983-07-21 Hitachi Ltd 磁気記録媒体に有機保護膜を形成する方法
US5124432A (en) * 1989-08-31 1992-06-23 The Dow Chemical Company Branched polybenzazole polymer and method of preparation

Also Published As

Publication number Publication date
CA2132545A1 (en) 1993-09-30
KR950701116A (ko) 1995-02-20
EP0632921A1 (en) 1995-01-11
WO1993019461A1 (en) 1993-09-30
KR950701115A (ko) 1995-02-20
JPH07504291A (ja) 1995-05-11
TW240311B (zh) 1995-02-11
WO1993019462A1 (en) 1993-09-30
TW216460B (zh) 1993-11-21

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Legal Events

Date Code Title Description
FZDE Dead