JPS57135435A - Magnetic recording agent - Google Patents

Magnetic recording agent

Info

Publication number
JPS57135435A
JPS57135435A JP2249181A JP2249181A JPS57135435A JP S57135435 A JPS57135435 A JP S57135435A JP 2249181 A JP2249181 A JP 2249181A JP 2249181 A JP2249181 A JP 2249181A JP S57135435 A JPS57135435 A JP S57135435A
Authority
JP
Japan
Prior art keywords
layer
lower layer
magnetic recording
isocyanate
magnetic layer
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.)
Pending
Application number
JP2249181A
Other languages
Japanese (ja)
Inventor
Akira Miyake
Yoshinori Yamamoto
Hiroshi Zaitsu
Masahiro Amamiya
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.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell 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 Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP2249181A priority Critical patent/JPS57135435A/en
Publication of JPS57135435A publication Critical patent/JPS57135435A/en
Pending 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
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/716—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by two or more magnetic layers

Abstract

PURPOSE:To reduce uneven sensitivity and an output variation, by using a binder component which is excellent in its solvent resisting property, as that which is used for a magnetic layer to be a lower layer of a magnetic recording medium having a multi-layer structure. CONSTITUTION:As for a binder component for forming a magnetic layer of a lower layer, phenoxy resin, polyurethane resin which has at least 2 or more hydroxyl groups and 10,000-30,000 molecular weight, and also an isocyanate compound having at least 2 or more isocyanate radicals are used jointly, 2 or more isocyanate radicals in the isocyanate compound are made to react to both a hydroxyl group in the phenoxy resin and 2 or more hydroxyl groups in the polyurethane resin so as to form a three-dimensional cross-linked structure, and a magnetic layer of a lower layer which has elevated its solvent dissolution resisting property is obtained.
JP2249181A 1981-02-17 1981-02-17 Magnetic recording agent Pending JPS57135435A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2249181A JPS57135435A (en) 1981-02-17 1981-02-17 Magnetic recording agent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2249181A JPS57135435A (en) 1981-02-17 1981-02-17 Magnetic recording agent

Publications (1)

Publication Number Publication Date
JPS57135435A true JPS57135435A (en) 1982-08-21

Family

ID=12084194

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2249181A Pending JPS57135435A (en) 1981-02-17 1981-02-17 Magnetic recording agent

Country Status (1)

Country Link
JP (1) JPS57135435A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022538726A (en) * 2019-05-15 2022-09-06 ダウ グローバル テクノロジーズ エルエルシー Two-component adhesive composition, article prepared therewith, and method of preparation thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4965203A (en) * 1972-10-20 1974-06-25
JPS52155505A (en) * 1976-06-18 1977-12-24 Hitachi Maxell Method of producing magnetic recording media having multiple magnetic layers
JPS55139634A (en) * 1979-04-16 1980-10-31 Hitachi Maxell Ltd Magnetic recording medium

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4965203A (en) * 1972-10-20 1974-06-25
JPS52155505A (en) * 1976-06-18 1977-12-24 Hitachi Maxell Method of producing magnetic recording media having multiple magnetic layers
JPS55139634A (en) * 1979-04-16 1980-10-31 Hitachi Maxell Ltd Magnetic recording medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022538726A (en) * 2019-05-15 2022-09-06 ダウ グローバル テクノロジーズ エルエルシー Two-component adhesive composition, article prepared therewith, and method of preparation thereof

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