EP0028796A3 - Magnetic metal or alloy pigments, process for their production, and their use - Google Patents

Magnetic metal or alloy pigments, process for their production, and their use Download PDF

Info

Publication number
EP0028796A3
EP0028796A3 EP80106768A EP80106768A EP0028796A3 EP 0028796 A3 EP0028796 A3 EP 0028796A3 EP 80106768 A EP80106768 A EP 80106768A EP 80106768 A EP80106768 A EP 80106768A EP 0028796 A3 EP0028796 A3 EP 0028796A3
Authority
EP
European Patent Office
Prior art keywords
production
magnetic metal
alloy pigments
pigments
alloy
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.)
Granted
Application number
EP80106768A
Other languages
German (de)
Other versions
EP0028796B1 (en
EP0028796A2 (en
Inventor
Hans-Peter Dr. Biermann
Helmut Dr. Steinberger
Arthur Dr. Botta
Rolf Dr. Naumann
Lutz Dr. Leitner
Heinrich Dr. Heine
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.)
Bayer AG
Original Assignee
Bayer 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 DE19792945687 external-priority patent/DE2945687A1/en
Priority claimed from DE19803027757 external-priority patent/DE3027757A1/en
Application filed by Bayer AG filed Critical Bayer AG
Publication of EP0028796A2 publication Critical patent/EP0028796A2/en
Publication of EP0028796A3 publication Critical patent/EP0028796A3/en
Application granted granted Critical
Publication of EP0028796B1 publication Critical patent/EP0028796B1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/061—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder with a protective layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B22F1/102—Metallic powder coated with organic material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • Y10T428/257—Iron oxide or aluminum oxide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated
    • Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
    • Y10T428/2995—Silane, siloxane or silicone coating

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Paints Or Removers (AREA)
EP80106768A 1979-11-13 1980-11-04 Coated magnetic metal or alloy pigments, process for their production, and their use Expired EP0028796B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2945687 1979-11-13
DE19792945687 DE2945687A1 (en) 1979-11-13 1979-11-13 Coated magnetic metal or alloy pigment useful in recording material - has ortho-silicate ester coating to prevent corrosion in humid aid
DE19803027757 DE3027757A1 (en) 1980-07-22 1980-07-22 Coated magnetic metal or alloy pigment useful in recording material - has ortho-silicate ester coating to prevent corrosion in humid aid
DE3027757 1980-07-22

Publications (3)

Publication Number Publication Date
EP0028796A2 EP0028796A2 (en) 1981-05-20
EP0028796A3 true EP0028796A3 (en) 1981-05-27
EP0028796B1 EP0028796B1 (en) 1983-07-13

Family

ID=25781971

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80106768A Expired EP0028796B1 (en) 1979-11-13 1980-11-04 Coated magnetic metal or alloy pigments, process for their production, and their use

Country Status (7)

Country Link
US (1) US4325739A (en)
EP (1) EP0028796B1 (en)
AU (1) AU534438B2 (en)
BR (1) BR8007358A (en)
CA (1) CA1148309A (en)
DE (1) DE3064151D1 (en)
PL (1) PL135721B1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3603267A1 (en) * 1986-02-04 1987-08-06 Roehm Gmbh DEVICE FOR REVERSIBLE, OPTICAL DATA STORAGE (I)
DE3603268A1 (en) * 1986-02-04 1987-09-24 Roehm Gmbh METHOD FOR REVERSIBLE, OPTICAL DATA STORAGE (III)
US4780148A (en) * 1988-01-25 1988-10-25 Dow Corning Corporation Stabilized magnetic metal pigment
FI85157C (en) * 1988-12-28 1992-03-10 Kemira Oy FOER FARING FOR FRAMSTAELLNING AV ETT TRANSPARENT METALLOXIDPIGMENT.
DE4226546A1 (en) * 1992-08-11 1994-02-17 Huels Chemische Werke Ag Binder for storable coating compositions
US5512094A (en) * 1992-11-20 1996-04-30 E. I. Du Pont De Nemours And Company Metal oxide coated silica shells
US6156428A (en) * 1995-06-02 2000-12-05 Gibson; Charles P. Base metal particles having anisometric morphology
GB0003782D0 (en) * 2000-02-17 2000-04-05 Dumex Ltd As Process
DE10201084A1 (en) * 2002-01-14 2003-07-24 Bayer Ag Magnetic particles containing silicon, process for their production and use of the particles
CN111116615B (en) * 2019-10-18 2023-08-18 青岛大学 Metal phosphonate material with room temperature demagnetizing effect and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE893566C (en) * 1944-08-13 1953-10-15 Telefunken Gmbh Ground iron for high frequency technology
FR1081148A (en) * 1952-03-25 1954-12-16 Gen Aniline & Film Corp Process for preparing iron powder with improved electromagnetic and mechanical properties
US4133677A (en) * 1976-04-05 1979-01-09 Toda Kogyo Corp. Process for producing acicular magnetic metallic particle powder

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2744040A (en) * 1952-03-25 1956-05-01 Gen Aniline & Film Corp Process of preparing iron powder for magnetic cores
US3520676A (en) * 1968-05-28 1970-07-14 Eastman Kodak Co Stabilization of pyrophoric metal powder
JPS5240847B2 (en) * 1972-10-05 1977-10-14
US4014710A (en) * 1973-08-02 1977-03-29 Bayer Aktiengesellschaft Magnetic pigments with improved orientability and a process for their production
DE2611281A1 (en) * 1975-03-17 1976-09-30 Hitachi Ltd PROCESS FOR THE MANUFACTURING OF FERROMAGNETIC METAL POWDER
DE2535277C2 (en) * 1975-08-07 1984-10-18 Basf Ag, 6700 Ludwigshafen Use of alkylene oxides to stabilize pyrophoric metal powder particles
JPS5843815B2 (en) * 1975-10-23 1983-09-29 富士写真フイルム株式会社 Jikiki Loc Tape
JPS6044805B2 (en) * 1976-08-27 1985-10-05 日本ビクター株式会社 Method for manufacturing magnetic recording media

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE893566C (en) * 1944-08-13 1953-10-15 Telefunken Gmbh Ground iron for high frequency technology
FR1081148A (en) * 1952-03-25 1954-12-16 Gen Aniline & Film Corp Process for preparing iron powder with improved electromagnetic and mechanical properties
US4133677A (en) * 1976-04-05 1979-01-09 Toda Kogyo Corp. Process for producing acicular magnetic metallic particle powder

Also Published As

Publication number Publication date
CA1148309A (en) 1983-06-21
PL135721B1 (en) 1985-12-31
EP0028796B1 (en) 1983-07-13
PL227770A1 (en) 1981-07-24
AU6423880A (en) 1981-05-21
DE3064151D1 (en) 1983-08-18
US4325739A (en) 1982-04-20
EP0028796A2 (en) 1981-05-20
AU534438B2 (en) 1984-01-26
BR8007358A (en) 1981-05-26

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