CA1079057A - Stabilisation de pigments magnetiques de dioxyde de chrome - Google Patents

Stabilisation de pigments magnetiques de dioxyde de chrome

Info

Publication number
CA1079057A
CA1079057A CA241,679A CA241679A CA1079057A CA 1079057 A CA1079057 A CA 1079057A CA 241679 A CA241679 A CA 241679A CA 1079057 A CA1079057 A CA 1079057A
Authority
CA
Canada
Prior art keywords
magnetic
chromium dioxide
pigment
silane
pigments
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
CA241,679A
Other languages
English (en)
Other versions
CA241679S (en
Inventor
Manfred Ohlinger
Dieter Schaefer
Paul Deigner
Eduard Schoenafinger
Eberhard Koester
Werner Stumpfi
Juergen Amort
Claus-Dietrich Seiler
Heinz Nestler
Otto Ambros
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.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
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 DE19742459766 external-priority patent/DE2459766A1/de
Priority claimed from DE19752538792 external-priority patent/DE2538792A1/de
Application filed by Dynamit Nobel AG filed Critical Dynamit Nobel AG
Application granted granted Critical
Publication of CA1079057A publication Critical patent/CA1079057A/fr
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
    • G11B5/706—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 composition of the magnetic material
    • G11B5/70626—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 composition of the magnetic material containing non-metallic substances
    • G11B5/70636—CrO2
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/34—Compounds of chromium
    • C09C1/346—Chromium oxides
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/12—Treatment with organosilicon compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)
CA241,679A 1974-12-18 1975-12-11 Stabilisation de pigments magnetiques de dioxyde de chrome Expired CA1079057A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19742459766 DE2459766A1 (de) 1974-12-18 1974-12-18 Verfahren zur stabilisierung von chromdioxid-magnetpigmenten
DE19752538792 DE2538792A1 (de) 1975-09-01 1975-09-01 Verfahren zur stabilisierung von chromdioxid-magnetpigmenten

Publications (1)

Publication Number Publication Date
CA1079057A true CA1079057A (fr) 1980-06-10

Family

ID=25768117

Family Applications (1)

Application Number Title Priority Date Filing Date
CA241,679A Expired CA1079057A (fr) 1974-12-18 1975-12-11 Stabilisation de pigments magnetiques de dioxyde de chrome

Country Status (6)

Country Link
JP (1) JPS5186796A (fr)
CA (1) CA1079057A (fr)
FR (1) FR2295096A1 (fr)
GB (1) GB1527760A (fr)
IT (1) IT1060452B (fr)
NL (1) NL7514524A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51134899A (en) * 1975-05-17 1976-11-22 Hitachi Maxell Ltd Processing method of magnetic powder
DE2617809C2 (de) * 1976-04-23 1984-09-20 Basf Ag, 6700 Ludwigshafen Verfahren zur Stabilisierung von Chromdioxid-Magnetpigmenten und seine Verwendung
JPS56130822A (en) * 1980-03-19 1981-10-14 Hitachi Maxell Ltd Magnetic recording medium
JPH0677310B2 (ja) * 1986-08-29 1994-09-28 富士写真フイルム株式会社 磁気記録媒体
JPH04184903A (ja) * 1990-11-19 1992-07-01 Toda Kogyo Corp 磁気記録用磁性粒子粉末の製造法

Also Published As

Publication number Publication date
GB1527760A (en) 1978-10-11
IT1060452B (it) 1982-08-20
FR2295096A1 (fr) 1976-07-16
NL7514524A (nl) 1976-06-22
JPS5186796A (fr) 1976-07-29

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Legal Events

Date Code Title Description
MKEX Expiry