NL7514524A - METHOD OF STABILIZING CHROME DIOXIDE MAGNETIC DEPIGMENTS. - Google Patents

METHOD OF STABILIZING CHROME DIOXIDE MAGNETIC DEPIGMENTS.

Info

Publication number
NL7514524A
NL7514524A NL7514524A NL7514524A NL7514524A NL 7514524 A NL7514524 A NL 7514524A NL 7514524 A NL7514524 A NL 7514524A NL 7514524 A NL7514524 A NL 7514524A NL 7514524 A NL7514524 A NL 7514524A
Authority
NL
Netherlands
Prior art keywords
depigments
stabilizing
dioxide magnetic
chrome dioxide
chrome
Prior art date
Application number
NL7514524A
Other languages
Dutch (nl)
Original Assignee
Basf 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/en
Priority claimed from DE19752538792 external-priority patent/DE2538792A1/en
Application filed by Basf Ag filed Critical Basf Ag
Publication of NL7514524A publication Critical patent/NL7514524A/en

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)
NL7514524A 1974-12-18 1975-12-12 METHOD OF STABILIZING CHROME DIOXIDE MAGNETIC DEPIGMENTS. NL7514524A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19742459766 DE2459766A1 (en) 1974-12-18 1974-12-18 Stabilised chromium dioxide magnetic pigments - obtd. by treatment with a hydrolysis prod. of an alkoxy silane and heat treating the prod.
DE19752538792 DE2538792A1 (en) 1975-09-01 1975-09-01 Stabilising magnetic chromium dioxide pigments - by suspending in aqueous medium, treating with hydrolysable organic silane, and drying

Publications (1)

Publication Number Publication Date
NL7514524A true NL7514524A (en) 1976-06-22

Family

ID=25768117

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7514524A NL7514524A (en) 1974-12-18 1975-12-12 METHOD OF STABILIZING CHROME DIOXIDE MAGNETIC DEPIGMENTS.

Country Status (6)

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

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 (en) * 1976-04-23 1984-09-20 Basf Ag, 6700 Ludwigshafen Process for the stabilization of chromium dioxide magnetic pigments and its use
JPS56130822A (en) * 1980-03-19 1981-10-14 Hitachi Maxell Ltd Magnetic recording medium
JPH0677310B2 (en) * 1986-08-29 1994-09-28 富士写真フイルム株式会社 Magnetic recording medium
JPH04184903A (en) * 1990-11-19 1992-07-01 Toda Kogyo Corp Manufacture of magnetic particle power for magnetic recording

Also Published As

Publication number Publication date
FR2295096A1 (en) 1976-07-16
IT1060452B (en) 1982-08-20
GB1527760A (en) 1978-10-11
CA1079057A (en) 1980-06-10
JPS5186796A (en) 1976-07-29

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Legal Events

Date Code Title Description
BV The patent application has lapsed