FR2446855A1 - COATING OF FINE PARTICLES IN A POLYURETHANE SEQUENCE COPOLYMER BINDER AND MAGNETIC RECORDING MEDIUM COMPRISING SUCH A COATING - Google Patents

COATING OF FINE PARTICLES IN A POLYURETHANE SEQUENCE COPOLYMER BINDER AND MAGNETIC RECORDING MEDIUM COMPRISING SUCH A COATING

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
French (fr)
Other versions
FR2446855B1 (en
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/en
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.The invention relates to the plastics and magnetic recording industry. Coating of fine particles, in particular magnetizable, containing as binder a polyurethane block copolymer consisting of: a. segments of polyester or polyether; b. short chain aliphatic segments comprising tertiary and / or quaternary nitrogen and c. symmetrical unbranched aromatic urethane segments joining segments a and b; the preferred block copolymers comprise flexible blocks synthesized from polyesterdiols or polyetherdiols and hard blocks synthesized from aliphatic diols containing a tertiary amine function and from p, p'diphenyl-methane diisocyanato. The copolymer acts as both a binder and a dispersant. Application to the production of magnetic recording media.

FR8001044A 1979-01-19 1980-01-18 COATING OF FINE PARTICLES IN A POLYURETHANE SEQUENCE COPOLYMER BINDER AND MAGNETIC RECORDING MEDIUM COMPRISING SUCH A COATING Granted FR2446855A1 (en)

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 (en) 1980-08-14
FR2446855B1 FR2446855B1 (en) 1983-11-10

Family

ID=21712670

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8001044A Granted FR2446855A1 (en) 1979-01-19 1980-01-18 COATING OF FINE PARTICLES IN A POLYURETHANE SEQUENCE COPOLYMER BINDER AND MAGNETIC RECORDING MEDIUM COMPRISING SUCH A COATING

Country Status (4)

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

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891524A (en) * 1981-11-24 1983-05-31 Hitachi Maxell Ltd Magnetic recording medium
JPS58115629A (en) * 1981-12-28 1983-07-09 Fuji Photo Film Co Ltd Magnetic recording medium
JPS58122619A (en) * 1982-01-14 1983-07-21 Sony Corp Magnetic recording medium
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 (en) * 1986-10-21 1988-05-09 Dainichi Color & Chem Mfg Co Ltd Magnetic recording medium
JPH0191317A (en) * 1987-09-30 1989-04-11 Sony Corp Magnetic recording medium
JPH0191315A (en) * 1987-10-01 1989-04-11 Sony Corp Magnetic recording medium
JPH02108225A (en) * 1988-10-17 1990-04-20 Tdk Corp Magnetic recording medium
JP2764736B2 (en) * 1989-03-15 1998-06-11 チッソ株式会社 Magnetic paint
JP2663184B2 (en) * 1989-11-10 1997-10-15 日本ポリウレタン工業株式会社 Method for producing polyurethane resin binder for magnetic recording medium
JP2663186B2 (en) * 1989-11-29 1997-10-15 日本ポリウレタン工業株式会社 Method for producing polyurethane resin binder for magnetic recording medium
FR2815350B1 (en) * 2000-10-17 2006-12-29 Oreal CATIONIC POLYURETHANES WITH ELASTIC CHARACTERISTICS

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 (en) * 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 (en) * 1966-03-12 1969-09-18 Bayer Ag Process for the production of polyurethane plastics

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 (en) * 1972-11-15 1974-06-07 Basf Ag

Also Published As

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

Similar Documents

Publication Publication Date Title
FR2446855A1 (en) COATING OF FINE PARTICLES IN A POLYURETHANE SEQUENCE COPOLYMER BINDER AND MAGNETIC RECORDING MEDIUM COMPRISING SUCH A COATING
JPS57150129A (en) Magnetic recording medium
ES8303468A1 (en) Thermosetting mixtures of polyisocyanate and polyol having an extended pot life, process for their preparation and their use.
CA2028177A1 (en) Filtration media with low protein adsorbability
DE69302681D1 (en) FIBER GRINDING BODIES THE ABRASIVES CONTAIN FILLED THERMOPLASTIC ELASTOMERS, PRODUCTION METHODS, OBJECTS THAT CONTAIN SUCH BODIES
ATE117012T1 (en) PLATE-SHAPED GRINDING BALLS.
MX9702267A (en) Coated abrasive article, method for preparing the same, and method of using.
EP0393230A3 (en) Functionalized fluoropolyethers
AU573918B2 (en) Composition comprising ceramic particles
CA2094921A1 (en) Hard segment size control in polyurethane formation
EP0544636A3 (en) Filter sector
KR950018162A (en) Polyurethane Compositions for Use as Dispersing Binders
FR2387912A1 (en) MAGNETIC PARTICLES OF IRON OXIDE CONTAINING COBALT AND THEIR PREPARATION PROCESS
JPS56137522A (en) Magnetic recording material
IE812187L (en) Magnetic medium
JPS5792422A (en) Magnetic recording medium
FR2708934B1 (en) Friction material containing copper oxide particles.
DE3274998D1 (en) Flexible, flat, sand containing laminated article for external use in body treatment
EP0081650A3 (en) Angularly multiplexed optical recording medium
JPS62187798A (en) Method of pretecting and lubricating friction and abrasion surface
ES2043077T3 (en) MAGNETIC RECORDING MEDIA.
FR2672070B1 (en) INJECTION PRODUCT FOR SEALING INTERSTICES, PARTICULARLY FOR THE CONSOLIDATION OF LAND AND OTHER APPLICATIONS.
EP0377297A3 (en) Sulfonated hydroxy-functional polyurethanes for use in magnetic recording media and its method for preparation
JPS57183627A (en) Magnetic recording medium
DE3262859D1 (en) Hydrostatic bearing

Legal Events

Date Code Title Description
ST Notification of lapse