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GB1375295A - - Google Patents

Info

Publication number
GB1375295A
GB1375295A GB1382672A GB1382672A GB1375295A GB 1375295 A GB1375295 A GB 1375295A GB 1382672 A GB1382672 A GB 1382672A GB 1382672 A GB1382672 A GB 1382672A GB 1375295 A GB1375295 A GB 1375295A
Authority
GB
United Kingdom
Prior art keywords
magnetic
march
coatings
weight
recording media
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.)
Expired
Application number
GB1382672A
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 filed Critical
Publication of GB1375295A publication Critical patent/GB1375295A/en
Expired 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
    • G11B5/7022—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 containing mixtures of polyurethanes or polyisocyanates with other polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • C08L75/06—Polyurethanes from polyesters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

1375295 Magnetic recording media BADISCHE ANILIN- & SODA-FABRIK AG 24 March 1972 [26 March 1971] 13826/72 Heading C3R Magnetic coatings for the manufacture of magnetic recording media comprise a solvent dispersion of a magnetic pigment in a binder comprising a mixture of 10 to 50% by weight of a polycarbonate derived from a bis-(4-hydroxyaryl) alkane and 90 to 50% by weight of a polyester urethane derived from a diisocyanate, a polyester which is the reaction product of an aliphatic dicarboxylic acid and a C 4-10 aliphatic diol, and a C 4-10 glycol. The coatings are applied to non-magnetic supports, in particular films of linear polyesters, such as polyethylene terephthalate to form magnetic tapes.
GB1382672A 1971-03-26 1972-03-24 Expired GB1375295A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712114611 DE2114611A1 (en) 1971-03-26 1971-03-26 Magnetic recording media

Publications (1)

Publication Number Publication Date
GB1375295A true GB1375295A (en) 1974-11-27

Family

ID=5802789

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1382672A Expired GB1375295A (en) 1971-03-26 1972-03-24

Country Status (7)

Country Link
BE (1) BE781192A (en)
CA (1) CA969433A (en)
DE (1) DE2114611A1 (en)
FR (1) FR2130654B1 (en)
GB (1) GB1375295A (en)
IT (1) IT952402B (en)
NL (1) NL7203689A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4430362A (en) 1981-12-28 1984-02-07 Basf Aktiengesellschaft Production of magnetic recording media
US5130202A (en) * 1989-08-22 1992-07-14 Basf Aktiengesellschaft Magnetic recording medium containing an isocyanate-free branched thermoplastic polyurethane binder resin with urea groups at the chain ends
US6720025B2 (en) 2002-07-01 2004-04-13 3M Innovative Properties Company Slot extrusion coating methods

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4430362A (en) 1981-12-28 1984-02-07 Basf Aktiengesellschaft Production of magnetic recording media
US5130202A (en) * 1989-08-22 1992-07-14 Basf Aktiengesellschaft Magnetic recording medium containing an isocyanate-free branched thermoplastic polyurethane binder resin with urea groups at the chain ends
US6720025B2 (en) 2002-07-01 2004-04-13 3M Innovative Properties Company Slot extrusion coating methods

Also Published As

Publication number Publication date
IT952402B (en) 1973-07-20
DE2114611A1 (en) 1972-10-05
NL7203689A (en) 1972-09-28
CA969433A (en) 1975-06-17
FR2130654A1 (en) 1972-11-03
FR2130654B1 (en) 1975-04-25
BE781192A (en) 1972-09-25

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee