GB1528787A - Magnetic recording media of abrasion resistance - Google Patents

Magnetic recording media of abrasion resistance

Info

Publication number
GB1528787A
GB1528787A GB4794775A GB4794775A GB1528787A GB 1528787 A GB1528787 A GB 1528787A GB 4794775 A GB4794775 A GB 4794775A GB 4794775 A GB4794775 A GB 4794775A GB 1528787 A GB1528787 A GB 1528787A
Authority
GB
United Kingdom
Prior art keywords
magnetic recording
weight
abrasion resistance
nov
magnetic
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
GB4794775A
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.)
BASF SE
Original Assignee
BASF SE
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
Priority claimed from DE19742455288 external-priority patent/DE2455288C3/en
Application filed by BASF SE filed Critical BASF SE
Publication of GB1528787A publication Critical patent/GB1528787A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/302—Polyurethanes or polythiourethanes; Polyurea or polythiourea
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/10—Esters; Ether-esters
    • C08K5/101—Esters; Ether-esters of monocarboxylic acids
    • 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
    • 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
    • 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
    • G11B5/71—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 lubricant

Abstract

1528787 Magnetic recording media BASF AG 21 Nov 1975 [22 Nov 1974] 47947/75 Heading C3R A magnetic recording medium comprises a non-magnetizable base having bonded to a surface thereof a magnetic layer which comprises a finely divided magnetic pigment dispersed in a binder comprising more than 50% by weight of a polyesterurethane or polyetherurethane, the layer containing 1 to 8% by weight of a monocarboxylic acid ester which is liquid at room temperature, and which is derived from a C 12-20 saturated fatty acid component comprising at least 60% by weight of isomerized C 12-20 saturated fatty acid and a saturated aliphatic alcohol of 3 to 8 carbon atoms. Preferred pigments are iron oxide and chromium dioxide. Suitable acid components for the production of the esters contain isopalmitic and/or isostearic acids. Conventional additives such as dispersing agents, fillers and flow control agents may be incorporated in the layers. The non-magnetizable base may be of polyvinyl chloride or a polyester. The magnetic recording medium may be used in the form of video tapes which have improved life in stop motion and improved abrasion resistance.
GB4794775A 1974-11-22 1975-11-21 Magnetic recording media of abrasion resistance Expired GB1528787A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742455288 DE2455288C3 (en) 1974-11-22 Layered magnetogram carrier with improved abrasion resistance

Publications (1)

Publication Number Publication Date
GB1528787A true GB1528787A (en) 1978-10-18

Family

ID=5931467

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4794775A Expired GB1528787A (en) 1974-11-22 1975-11-21 Magnetic recording media of abrasion resistance

Country Status (4)

Country Link
FR (1) FR2292301A1 (en)
GB (1) GB1528787A (en)
IT (1) IT1052364B (en)
NL (1) NL181893C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2496113A1 (en) * 1980-12-15 1982-06-18 Ashland Oil Inc COATING COMPOSITIONS FOR FLEXIBLE CARRIERS BASED ON POLYESTER RESINS CURABLE BY VAPOR PERMEATION

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6028052B2 (en) * 1977-06-01 1985-07-02 ソニー株式会社 magnetic recording medium
US4666784A (en) * 1985-07-26 1987-05-19 Toyo Boseki Kabushiki Kaisha Magnetic recording medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2496113A1 (en) * 1980-12-15 1982-06-18 Ashland Oil Inc COATING COMPOSITIONS FOR FLEXIBLE CARRIERS BASED ON POLYESTER RESINS CURABLE BY VAPOR PERMEATION
NL8105646A (en) * 1980-12-15 1982-07-01 Ashland Oil Inc VAPOR PERFORATION CURABLE POLYESTER RESIN COATING COMPOSITIONS FOR FLEXIBLE SUBSTRATES.

Also Published As

Publication number Publication date
NL7513465A (en) 1976-05-25
FR2292301B3 (en) 1978-08-25
IT1052364B (en) 1981-06-20
DE2455288A1 (en) 1976-06-24
NL181893B (en) 1987-06-16
FR2292301A1 (en) 1976-06-18
DE2455288B2 (en) 1977-05-18
NL181893C (en) 1987-11-16

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Legal Events

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

Effective date: 19941121