FR2295096A1 - PROCESS FOR STABILIZING MAGNETIC CHROMATE CHROMATE PIGMENTS - Google Patents

PROCESS FOR STABILIZING MAGNETIC CHROMATE CHROMATE PIGMENTS

Info

Publication number
FR2295096A1
FR2295096A1 FR7538432A FR7538432A FR2295096A1 FR 2295096 A1 FR2295096 A1 FR 2295096A1 FR 7538432 A FR7538432 A FR 7538432A FR 7538432 A FR7538432 A FR 7538432A FR 2295096 A1 FR2295096 A1 FR 2295096A1
Authority
FR
France
Prior art keywords
chromate
pigments
stabilizing magnetic
stabilizing
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.)
Pending
Application number
FR7538432A
Other languages
French (fr)
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 DE19742459766 external-priority patent/DE2459766A1/en
Priority claimed from DE19752538792 external-priority patent/DE2538792A1/en
Application filed by BASF SE filed Critical BASF SE
Publication of FR2295096A1 publication Critical patent/FR2295096A1/en
Pending 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)
FR7538432A 1974-12-18 1975-12-16 PROCESS FOR STABILIZING MAGNETIC CHROMATE CHROMATE PIGMENTS Pending FR2295096A1 (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
FR2295096A1 true FR2295096A1 (en) 1976-07-16

Family

ID=25768117

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7538432A Pending FR2295096A1 (en) 1974-12-18 1975-12-16 PROCESS FOR STABILIZING MAGNETIC CHROMATE CHROMATE PIGMENTS

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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2349629A1 (en) * 1976-04-23 1977-11-25 Basf Ag PROCESS FOR STABILIZING MAGNETIC CHROMATE CHROMATE PIGMENTS

Families Citing this family (4)

* 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
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2349629A1 (en) * 1976-04-23 1977-11-25 Basf Ag PROCESS FOR STABILIZING MAGNETIC CHROMATE CHROMATE PIGMENTS

Also Published As

Publication number Publication date
IT1060452B (en) 1982-08-20
GB1527760A (en) 1978-10-11
CA1079057A (en) 1980-06-10
JPS5186796A (en) 1976-07-29
NL7514524A (en) 1976-06-22

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Legal Events

Date Code Title Description
TP Transmission of property