JPS5515279A - Processing method for magnetic powder - Google Patents

Processing method for magnetic powder

Info

Publication number
JPS5515279A
JPS5515279A JP8900778A JP8900778A JPS5515279A JP S5515279 A JPS5515279 A JP S5515279A JP 8900778 A JP8900778 A JP 8900778A JP 8900778 A JP8900778 A JP 8900778A JP S5515279 A JPS5515279 A JP S5515279A
Authority
JP
Japan
Prior art keywords
mole
thereafter
powder
magnetic powder
metacrylic
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
JP8900778A
Other languages
Japanese (ja)
Inventor
Kenji Sumiya
Sadamu Kuze
Seiji Wataya
Tsunetaka Matsumoto
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 JP8900778A priority Critical patent/JPS5515279A/en
Publication of JPS5515279A publication Critical patent/JPS5515279A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To improve a dispersion property in a binder by adding monomer such as metacrylic acid and others, acryl series monomer and copolymer starter and precipitate to a water medium containing a dispersed magnetic powder and thereafter by covering the powder surface with those components.
CONSTITUTION: A monomer containing 10 mole % of metacrylic acid, 45 mole % of metacrylic methyl and 45 mole % of acrylic acid ethyl is primarily added to 10 part of γ-Fe2O3 magnetic powder. Successively, karium sulfide 0.003 part, sodium sulfate 0.5 part and water 100 part are added to the above composition to heat and provide a repolymer for them, thereafter being washed, filtered and dried. Thereafter this powder is mixed together with vinyl chloride - vinyl acetate - vinyl alcohol copolymer and methyl isobutyl ketone - toluen mixed solvent to be kneaded together and is coated and dried on a polyester film. By such a process, a magnetic tape with a great retangular rate can be prepared.
COPYRIGHT: (C)1980,JPO&Japio
JP8900778A 1978-07-20 1978-07-20 Processing method for magnetic powder Pending JPS5515279A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8900778A JPS5515279A (en) 1978-07-20 1978-07-20 Processing method for magnetic powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8900778A JPS5515279A (en) 1978-07-20 1978-07-20 Processing method for magnetic powder

Publications (1)

Publication Number Publication Date
JPS5515279A true JPS5515279A (en) 1980-02-02

Family

ID=13958785

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8900778A Pending JPS5515279A (en) 1978-07-20 1978-07-20 Processing method for magnetic powder

Country Status (1)

Country Link
JP (1) JPS5515279A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS573224A (en) * 1980-06-05 1982-01-08 Toshiba Corp Magnetic recording body
JPS5834368U (en) * 1981-08-31 1983-03-05 エスエムケイ株式会社 Contacts for sliding connectors
US5015384A (en) * 1988-05-25 1991-05-14 Burke Dennis A Anaerobic digestion process
WO1992020628A1 (en) * 1988-05-25 1992-11-26 Burke Dennis A Anaerobic digestion process
US5306422A (en) * 1988-09-07 1994-04-26 Lenox Institute Of Water Technology, Inc. Compact clarifier system for municipal waste water treatment
US5310485A (en) * 1992-09-30 1994-05-10 Darling-Delaware Company, Inc. Process for dissolved gas flotation in anaerobic wastewater treatment
US5419833A (en) * 1987-06-24 1995-05-30 Amoco Corporation Apparatus for treatment of wastewater
US5501903A (en) * 1994-07-29 1996-03-26 Minnesota Mining And Manufacturing Company Magnetic recording medium having a binder system including a non halogenated vinyl polymer and a polyurethane polymer each with specified pendant groups
US5510187A (en) * 1993-04-27 1996-04-23 Minnesota Mining And Manufacturing Company Magnetic recording medium whose magnetic layer incorporates nonhalogenated vinyl copolymer and specified polyurethane polymer
US5674604A (en) * 1995-03-31 1997-10-07 Minnesota Mining And Manufacturing Company Magnetic recording medium comprising magnetic particles, binder, and a non halogenated vinyl oligomer dispersant
US6113786A (en) * 1996-04-15 2000-09-05 Western Environmental Engineering Company Anaerobic treatment process with removal of inorganic material
US6309547B1 (en) 1996-04-15 2001-10-30 Western Environmental Engineering Company Anaerobic treatment process with removal of nonbiodegradable organic material

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS573224A (en) * 1980-06-05 1982-01-08 Toshiba Corp Magnetic recording body
JPS5834368U (en) * 1981-08-31 1983-03-05 エスエムケイ株式会社 Contacts for sliding connectors
US5419833A (en) * 1987-06-24 1995-05-30 Amoco Corporation Apparatus for treatment of wastewater
WO1992020628A1 (en) * 1988-05-25 1992-11-26 Burke Dennis A Anaerobic digestion process
US5015384A (en) * 1988-05-25 1991-05-14 Burke Dennis A Anaerobic digestion process
US5306422A (en) * 1988-09-07 1994-04-26 Lenox Institute Of Water Technology, Inc. Compact clarifier system for municipal waste water treatment
US5310485A (en) * 1992-09-30 1994-05-10 Darling-Delaware Company, Inc. Process for dissolved gas flotation in anaerobic wastewater treatment
US5437785A (en) * 1992-09-30 1995-08-01 Darling International Apparatus for dissolved gas flotation in anaerobic wastewater treatment
US5510187A (en) * 1993-04-27 1996-04-23 Minnesota Mining And Manufacturing Company Magnetic recording medium whose magnetic layer incorporates nonhalogenated vinyl copolymer and specified polyurethane polymer
US5501903A (en) * 1994-07-29 1996-03-26 Minnesota Mining And Manufacturing Company Magnetic recording medium having a binder system including a non halogenated vinyl polymer and a polyurethane polymer each with specified pendant groups
US5712345A (en) * 1994-07-29 1998-01-27 Minnesota Mining And Manufacturing Company Binder system for magnetic media
US5674604A (en) * 1995-03-31 1997-10-07 Minnesota Mining And Manufacturing Company Magnetic recording medium comprising magnetic particles, binder, and a non halogenated vinyl oligomer dispersant
US6113786A (en) * 1996-04-15 2000-09-05 Western Environmental Engineering Company Anaerobic treatment process with removal of inorganic material
US6309547B1 (en) 1996-04-15 2001-10-30 Western Environmental Engineering Company Anaerobic treatment process with removal of nonbiodegradable organic material

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