JPS55129932A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS55129932A
JPS55129932A JP3581079A JP3581079A JPS55129932A JP S55129932 A JPS55129932 A JP S55129932A JP 3581079 A JP3581079 A JP 3581079A JP 3581079 A JP3581079 A JP 3581079A JP S55129932 A JPS55129932 A JP S55129932A
Authority
JP
Japan
Prior art keywords
vinyl
tri
binder
magnetic
molecular weight
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
JP3581079A
Other languages
Japanese (ja)
Inventor
Takeshi Matsuura
Seiji Wataya
Akira Morioka
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 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 JP3581079A priority Critical patent/JPS55129932A/en
Publication of JPS55129932A publication Critical patent/JPS55129932A/en
Pending legal-status Critical Current

Links

Landscapes

  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE: To improve durability and dispersion of magnetic powder by using a material where the mixture material of a tri-functional low-molecular weight isocyanate compound and a polyurethane pre-polymer and a vinyl chloride-vinyl acetate-vinyl alcohol copolymer are mixed in a specific proportion.
CONSTITUTION: The material, where 95W80pts.wt. of a vinyl chloridevinyl acetate-vinyl alcohol copolymer is mixed for 5W20pts.wt. of the mixture material of a tri-functional low-molecular weight isocyanate compound (Desmodur L, etc.,) and a liner chain polyurethane prepolymer having a quantity 1W4 times as large as the quantity of the compound above and having isocyanate radicals at both ends, is used as a binder to form a magnetic layer containing γ-Fe2O3, etc., or magnetic powder of Fe3O4, etc., containing Co, which has a bad dispersion property in the binder, on the polyester film, thereby producing a magnetic tape. Thus, a magnetic tape for, specially, high-density recording for video, etc., is produced which is superior in durability and has a good S/N ratio.
COPYRIGHT: (C)1980,JPO&Japio
JP3581079A 1979-03-26 1979-03-26 Magnetic recording medium Pending JPS55129932A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3581079A JPS55129932A (en) 1979-03-26 1979-03-26 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3581079A JPS55129932A (en) 1979-03-26 1979-03-26 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS55129932A true JPS55129932A (en) 1980-10-08

Family

ID=12452276

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3581079A Pending JPS55129932A (en) 1979-03-26 1979-03-26 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS55129932A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49109007A (en) * 1973-02-13 1974-10-17

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49109007A (en) * 1973-02-13 1974-10-17

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