GB1079609A - Improvements in or relating to magnetic iron oxide dispersions suitable for magnetic recording media - Google Patents

Improvements in or relating to magnetic iron oxide dispersions suitable for magnetic recording media

Info

Publication number
GB1079609A
GB1079609A GB24004/66A GB2400466A GB1079609A GB 1079609 A GB1079609 A GB 1079609A GB 24004/66 A GB24004/66 A GB 24004/66A GB 2400466 A GB2400466 A GB 2400466A GB 1079609 A GB1079609 A GB 1079609A
Authority
GB
United Kingdom
Prior art keywords
relating
iron oxide
recording media
magnetic
magnetic iron
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
GB24004/66A
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.)
Ampex Corp
Original Assignee
Ampex Corp
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 Ampex Corp filed Critical Ampex Corp
Publication of GB1079609A publication Critical patent/GB1079609A/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
    • G11B5/7013—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 dispersing agent
    • 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
    • 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

Abstract

The dispersion of a magnetic iron-oxide in an organic solvent comprising employing as dispersing agent a long chain fatty acid-diamine soap, mixed with or without lecithin. These soaps may be prepared by reacting stoichiometric amounts of a saturated fatty acid having from 12 to 18 carbon atoms and a diamine having from 12 to 18 carbon atoms in each chain. Such a soap is known under the Trade Name "Troykyd 98C," and has a molecular weight of about 490.
GB24004/66A 1965-06-03 1966-05-27 Improvements in or relating to magnetic iron oxide dispersions suitable for magnetic recording media Expired GB1079609A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US461170A US3412044A (en) 1965-06-03 1965-06-03 Diamine soap as dispersant in magnetic tape formulations

Publications (1)

Publication Number Publication Date
GB1079609A true GB1079609A (en) 1967-08-16

Family

ID=23831478

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24004/66A Expired GB1079609A (en) 1965-06-03 1966-05-27 Improvements in or relating to magnetic iron oxide dispersions suitable for magnetic recording media

Country Status (5)

Country Link
US (1) US3412044A (en)
BE (1) BE681701A (en)
DE (1) DE1285004B (en)
GB (1) GB1079609A (en)
NL (1) NL6607670A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1431854A (en) * 1972-04-07 1976-04-14 Sony Corp Magnetic recording media and methods of making them
DE3128013C1 (en) * 1981-07-15 1982-11-11 Siemens Ag Control circuit for at least one light emitting diode

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149996A (en) * 1960-11-16 1964-09-22 Basf Ag Magnetic record member
US3262812A (en) * 1964-03-26 1966-07-26 Gen Electric Magnetic recording tape with magnetic layer of oxide coated iron-cobalt alloy particles in a binder

Also Published As

Publication number Publication date
DE1285004B (en) 1968-12-12
NL6607670A (en) 1966-12-05
US3412044A (en) 1968-11-19
BE681701A (en) 1966-10-31

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