中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

7 records (took 0.037 seconds)

    MAGNETIC RECORDING MEDIUM
    1.
    发明专利
    MAGNETIC RECORDING MEDIUM 失效

    公开(公告)号：JPH0676275A

    公开(公告)日：1994-03-18

    申请号：JP14930093

    申请日：1993-06-21

    Applicant: BASF MAGNETICS GMBH

    Inventor： URURITSUHI IEEGAA ,  MIHIYAERU BOBURITSUHI ,  HERUMUUTO KOPUKE ,  RAINAA EDAA ,  HANSUUPEETAA SHIRUTOBERUKU ,  KURAUSU DEIITAA SHIYOOMAN ,  HAARARUTO KERAA

    IPC: C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/64 ,  G11B5/72

    Abstract: PURPOSE: To improve wear resistance and corrosion resistance by forming a protective layer comprising a specified polyurethane having specified mol.wt. obtd. by specified reaction on a ferromagnetic metal layer. CONSTITUTION: A protective layer formed on a metal layer consists of a polyurethane having 500 to 10000 average mol.wt. This polyurethane is obtd. by the following reaction. An isocyanate expressed by formula Q-(NCO)z is made to react with a compd. expressed by formula Rf -A-B and/or a compd. expressed by formula X-RH-B. In formulae, Q is an alkyl, cycloalkyl or heterocycloalkyl group, (z) is an integer 1 to 5, Rf is a perfluoro (cyclo) alkyl or perfluoroalkyl aryl group having 3 to 30 carbon atoms, A is -(CH2 )n -, wherein(n)= 1 to 10, B is -OH, =NK, -NH2 or -(COOH), RH is an alkyl or cycloalkyl group having 1 to 30 carbon atoms, and X is -H, -OH, =NH, -NH2 , -SO3 H or -SO3 Na.

    MAGNETIC RECORDING MEDIUM
    3.
    发明专利
    MAGNETIC RECORDING MEDIUM 失效

    公开(公告)号：JPH06295430A

    公开(公告)日：1994-10-21

    申请号：JP161594

    申请日：1994-01-12

    Applicant: BASF MAGNETICS GMBH

    Inventor： HAARARUTO KERAA ,  URURIHI IEEGAA ,  HERUMUUTO SHIYUTAININGAA ,  HERUMUUTO KOPUKE ,  KURAUSU DEIITAA SHIYOOMAN ,  HANSUUPEETAA SHIRUTOBERUKU

    IPC: C09D5/00 ,  C10M105/54 ,  C10M105/72 ,  C10N40/18 ,  G11B5/64 ,  G11B5/72 ,  G11B5/725

    Abstract: PURPOSE: To obtain a magnetic recording medium having a ferromagnetic metal layer on a nonmagnetic substrate and having a protective layer thereon which shows excellent durability against repeated use by constituting the protective layer of a component expressed by specified formula. CONSTITUTION: This magnetic recording medium consists of a nonmagnetic substrate, at least one ferromagnetic metal layer on the substrate and a protective layer on the metal layer. This protective layer is formed of a compsn. expressed by formula Z-(CF2 )m -(CH2 )n -X-Y-(CH2 )n -(CF2 )m -Z. In formula, X is -S- or -CHOH, Y is -S- or -C=O, Z is -CH3 , -CF3 or -CH=CH2 , n is an integer 2 to 17, and m is an integer 0 to 7. Thereby, the obtd. magnetic recording medium has excellent surface mechanical characteristics showing special durability even when it is repeatedly used, and the medium is extremely stable against corrosion of the metal thin film by air of humidity in air. Therefore, a recording medium having excellent wear resistance and corrosion resistance can be obtd.

    METHOD FOR EXECUTION OF THIN-METAL LAYER ON POLYMER STRUCTURE
    5.
    发明专利
    METHOD FOR EXECUTION OF THIN-METAL LAYER ON POLYMER STRUCTURE 失效

    公开(公告)号：JPH06187638A

    公开(公告)日：1994-07-08

    申请号：JP15353393

    申请日：1993-06-24

    Applicant: BASF MAGNETICS GMBH

    Inventor： HANSUUPEETAA SHIRUTOBERUKU ,  GERUTO FUITSUSHIYAA ,  HARUTOMUUTO HIBUSUTO

    IPC: C23C14/20 ,  C23C14/56 ,  G11B5/85

    Abstract: PURPOSE: To maximize the yield of a magnetic material by using a PVD method by vapor deposition of the magnetic material in an oblique angle direction at the time of forming a thin-film metallic layer on a polymer substrate. CONSTITUTION: The web-like substrate 2 passes over such a drum-like supporting body 1 which has a radius R and of which the revolving shaft is the origin of an x/y coordinate system. Coating screens 3, 3' condense the metallic vapor jet from a crucible evaporator 4 onto the substrate 2 at the point of a range 5. The angel range opened for coating on the substrate 2 is regulated by graduation angles Φ1 , Φ2 and is determined by the position of the evaporator 4. The coordinate base point of the angles Φ2, Φ1 is calculated in the counterclockwise direction starting from the position Xaxis of the coordinate system existing at the revolving shaft of the drum-like supporting body 1. The coordinate system of the evaporator 4 is like equation I. In the equation, A: the max. value of the quantity of the metal vapor butting against the substrate 2, β1 , β2 : the angles between the central perpendicular line of the evaporator 4 and the line connecting the center of the evaporator 4 and the ends of the coating screens 3, 3', (n): the evaporation rate specific to the evaporating metal source and is a value of 2 to 5.

Patent Agency Ranking