GB1132956A - Binder system for magneto recording medium - Google Patents

Binder system for magneto recording medium

Info

Publication number
GB1132956A
GB1132956A GB22677/66A GB2267766A GB1132956A GB 1132956 A GB1132956 A GB 1132956A GB 22677/66 A GB22677/66 A GB 22677/66A GB 2267766 A GB2267766 A GB 2267766A GB 1132956 A GB1132956 A GB 1132956A
Authority
GB
United Kingdom
Prior art keywords
binder
recording medium
polyurethane
contain
binder system
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
GB22677/66A
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 GB1132956A publication Critical patent/GB1132956A/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
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08L27/06—Homopolymers or copolymers of vinyl chloride
    • 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

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

1,132,956. Magnetic compositions. AMPEX CORP. 20 May, 1966 [24 May, 1965], No. 22677/66. Heading H1H. The binder for coating magnetic particles on a backing comprises a vinyl acetate-vinyl chloride copolymer mixed with a polyurethane. The copolymer may constitute 10-77À5% of the binder, and may contain 91% chloride, 3% acetate, and 6% alcohol. The polyurethane may be obtained by reacting 2,4-toluene-, hexamethylene-, or p-p<SP>1</SP>-diphenylmethane-diisocy - anate with adipic or phthalic acid and glycerin, hexanetriol, or butanediol-1,4. The coating may contain 70-80% b.w. magnetic particles. In the examples, Fe oxide is dispersed in solvents and combined with the resins solution in a ball mill; the mixture is then coated on to a polyester base and dried at 175‹ and 225‹ F.
GB22677/66A 1965-05-24 1966-05-20 Binder system for magneto recording medium Expired GB1132956A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US45847965A 1965-05-24 1965-05-24

Publications (1)

Publication Number Publication Date
GB1132956A true GB1132956A (en) 1968-11-06

Family

ID=23820945

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22677/66A Expired GB1132956A (en) 1965-05-24 1966-05-20 Binder system for magneto recording medium

Country Status (4)

Country Link
BE (1) BE680984A (en)
DE (1) DE1282700B (en)
GB (1) GB1132956A (en)
NL (1) NL6606745A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409299A (en) 1981-03-02 1983-10-11 Fuji Photo Film Co., Ltd. Magnetic recording medium
US4430362A (en) 1981-12-28 1984-02-07 Basf Aktiengesellschaft Production of magnetic recording media
US4597990A (en) * 1984-08-31 1986-07-01 Basf Aktiengesellschaft Preparation 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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986006088A1 (en) * 1985-04-08 1986-10-23 Minnesota Mining And Manufacturing Company Chip- and abrasion-resistant polyurethane coating composition having improved adhesion
DE3707440A1 (en) * 1987-03-07 1988-09-15 Basf Ag MAGNETIC RECORDING CARRIERS

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909442A (en) * 1949-07-15 1959-10-20 Minnesota Mining & Mfg Transfer ribbon
DE1130612B (en) * 1961-01-03 1962-05-30 Agfa Ag Process for the production of layered magnetic memories for sound, image and pulse recording

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409299A (en) 1981-03-02 1983-10-11 Fuji Photo Film Co., Ltd. Magnetic recording medium
US4430362A (en) 1981-12-28 1984-02-07 Basf Aktiengesellschaft Production of magnetic recording media
US4597990A (en) * 1984-08-31 1986-07-01 Basf Aktiengesellschaft Preparation 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

Also Published As

Publication number Publication date
BE680984A (en) 1966-10-17
DE1282700B (en) 1968-11-14
NL6606745A (en) 1966-11-25

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