FR2446855A1 - Revetement de particules fines dans un liant en copolymere sequence de polyurethane et milieu d'enregistrement magnetique comportant un tel revetement - Google Patents

Revetement de particules fines dans un liant en copolymere sequence de polyurethane et milieu d'enregistrement magnetique comportant un tel revetement

Info

Publication number
FR2446855A1
FR2446855A1 FR8001044A FR8001044A FR2446855A1 FR 2446855 A1 FR2446855 A1 FR 2446855A1 FR 8001044 A FR8001044 A FR 8001044A FR 8001044 A FR8001044 A FR 8001044A FR 2446855 A1 FR2446855 A1 FR 2446855A1
Authority
FR
France
Prior art keywords
coating
magnetic recording
segments
fine particles
binder
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
FR8001044A
Other languages
English (en)
Other versions
FR2446855B1 (fr
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of FR2446855A1 publication Critical patent/FR2446855A1/fr
Application granted granted Critical
Publication of FR2446855B1 publication Critical patent/FR2446855B1/fr
Granted 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
    • G11B5/702—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 the bonding agent
    • G11B5/7021—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 the bonding agent containing a polyurethane or a polyisocyanate
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/0804—Manufacture of polymers containing ionic or ionogenic groups
    • C08G18/0809—Manufacture of polymers containing ionic or ionogenic groups containing cationic or cationogenic groups
    • C08G18/0814—Manufacture of polymers containing ionic or ionogenic groups containing cationic or cationogenic groups containing ammonium groups or groups forming them
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Laminated Bodies (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

L'invention concerne l'industrie des matières plastiques et de l'enregistrement magnétique. Revêtement de particules fines, notamment aimantables, renfermant comme liant un copolymère séquence de polyuréthane constitué de : a. des segments de polyester ou de polyéther; b. des segments aliphatiques à chaîne courte comportant de l'azote tertiaire et/ou quaternaire et c. des segments d'uréthane aromatique non ramifié symétrique réunissant les segments a et b; les copolymères séquencés préférés comportent des blocs souples synthétisés à partir de polyesterdiols ou de polyétherdiols et des blocs durs synthétisés à partir de diols aliphatiques à fonction amine tertiaire et de diisocyanato p,p'diphényl-méthane. Le copolymère agit à la fois comme liant et dispersant. Application à la réalisation de milieux d'enregistrement magnétique.
FR8001044A 1979-01-19 1980-01-18 Revetement de particules fines dans un liant en copolymere sequence de polyurethane et milieu d'enregistrement magnetique comportant un tel revetement Granted FR2446855A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US481679A 1979-01-19 1979-01-19

Publications (2)

Publication Number Publication Date
FR2446855A1 true FR2446855A1 (fr) 1980-08-14
FR2446855B1 FR2446855B1 (fr) 1983-11-10

Family

ID=21712670

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8001044A Granted FR2446855A1 (fr) 1979-01-19 1980-01-18 Revetement de particules fines dans un liant en copolymere sequence de polyurethane et milieu d'enregistrement magnetique comportant un tel revetement

Country Status (4)

Country Link
JP (1) JPS55100157A (fr)
DE (1) DE3002164C2 (fr)
FR (1) FR2446855A1 (fr)
GB (1) GB2039930B (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891524A (ja) * 1981-11-24 1983-05-31 Hitachi Maxell Ltd 磁気記録媒体
JPS58115629A (ja) * 1981-12-28 1983-07-09 Fuji Photo Film Co Ltd 磁気記録媒体
JPS58122619A (ja) * 1982-01-14 1983-07-21 Sony Corp 磁気記録媒体
US4525424A (en) * 1983-12-30 1985-06-25 International Business Machines Corporation Flexible magnetic recording media having a polyester-polyurethane binder and chromium dioxide pigment
JPS63103416A (ja) * 1986-10-21 1988-05-09 Dainichi Color & Chem Mfg Co Ltd 磁気記録媒体
JPH0191317A (ja) * 1987-09-30 1989-04-11 Sony Corp 磁気記録媒体
JPH0191315A (ja) * 1987-10-01 1989-04-11 Sony Corp 磁気記録媒体
JPH02108225A (ja) * 1988-10-17 1990-04-20 Tdk Corp 磁気記録媒体
JP2764736B2 (ja) * 1989-03-15 1998-06-11 チッソ株式会社 磁性塗料
JP2663184B2 (ja) * 1989-11-10 1997-10-15 日本ポリウレタン工業株式会社 磁気記録媒体用ポリウレタン樹脂バインダーの製造方法
JP2663186B2 (ja) * 1989-11-29 1997-10-15 日本ポリウレタン工業株式会社 磁気記録媒体用ポリウレタン樹脂バインダーの製造方法
FR2815350B1 (fr) * 2000-10-17 2006-12-29 Oreal Polyurethanes cationiques a caractere elastique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1066488A (en) * 1962-10-26 1967-04-26 Bayer Ag A process for the production of elastic synthetic polyurethanes
US3490945A (en) * 1966-11-15 1970-01-20 Rca Corp Magnetic recording element and method for preparing same
FR2206547A1 (fr) * 1972-11-15 1974-06-07 Basf Ag

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1595602A1 (de) * 1966-03-12 1969-09-18 Bayer Ag Verfahren zur Herstellung von Polyurethan-Kunststoffen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1066488A (en) * 1962-10-26 1967-04-26 Bayer Ag A process for the production of elastic synthetic polyurethanes
US3490945A (en) * 1966-11-15 1970-01-20 Rca Corp Magnetic recording element and method for preparing same
FR2206547A1 (fr) * 1972-11-15 1974-06-07 Basf Ag

Also Published As

Publication number Publication date
FR2446855B1 (fr) 1983-11-10
DE3002164A1 (de) 1980-07-31
JPS55100157A (en) 1980-07-30
GB2039930B (en) 1983-05-25
GB2039930A (en) 1980-08-20
DE3002164C2 (de) 1994-05-05
JPS6321613B2 (fr) 1988-05-09

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Legal Events

Date Code Title Description
ST Notification of lapse