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    LINEAR AROMATIC POLYMER, ITS MANUFACTURING METHOD AND COATING FLUID FOR FORMING INSULATING FILM
    21.
    发明专利
    LINEAR AROMATIC POLYMER, ITS MANUFACTURING METHOD AND COATING FLUID FOR FORMING INSULATING FILM 失效

    公开(公告)号：JP2002020482A

    公开(公告)日：2002-01-23

    申请号：JP2000203650

    申请日：2000-07-05

    Applicant: SUMITOMO CHEMICAL CO

    Inventor： IWASE SADANOBU ,  YOKOTA AKIRA ,  CHE HYONCHORU

    IPC: C08J3/24 ,  C08G63/91 ,  C08G65/48 ,  C08G75/23 ,  C09D5/25 ,  C09D171/12 ,  H01B3/30 ,  H01B3/42 ,  H01B3/46

    Abstract: PROBLEM TO BE SOLVED: To obtain a linear aromatic polymer which comprises a thermosetting resin curable through a crosslinking reaction even at 280 deg.C or below, and can be used as a material for an interlayer insulating film, to provide its manufacturing method, and to obtain a coating liquid which can form an insulating film excellent in chemical resistance. SOLUTION: The linear aromatic polymer has a structure wherein a functional group represented by formula (1) is directly bonded to an aromatic ring. The manufacturing method involves the steps of metallizing the polymer and then subjecting a compound represented by formula (4) to substitution reaction. The coating liquid for forming an insulating film contains the aromatic polymer. In the formulas, A is C or Si; B1, B2 and B3 are each a 2-10C alkenyl, alkynyl, a 1-10C alkyl, methoxy, ethoxy or phenyl, provided that at least two of B1, B2 and B3 are each a 2-10C aklkenyl or alkynyl; and X is a halogen atom.

    MODIFIED CYANATE ESTER RESIN VANISH FOR PRINTED CIRCUIT BOARD AND PREPARATION THEREOF
    22.
    发明专利
    MODIFIED CYANATE ESTER RESIN VANISH FOR PRINTED CIRCUIT BOARD AND PREPARATION THEREOF 失效

    公开(公告)号：JPH1121506A

    公开(公告)日：1999-01-26

    申请号：JP18114397

    申请日：1997-07-07

    Applicant: HITACHI CHEMICAL CO LTD

    Inventor： SASE SHIGEO ,  MIZUNO YASUYUKI ,  SUGIMURA TAKESHI ,  NEGISHI HARUMI

    IPC: C07D251/34 ,  B32B5/28 ,  C08G73/06 ,  C08K5/03 ,  C08K5/13 ,  C08K5/24 ,  C08K5/3477 ,  C08L79/00 ,  C09D7/12 ,  C09D171/12 ,  C09D179/00 ,  C09K21/10 ,  H05K1/03

    Abstract: PROBLEM TO BE SOLVED: To obtain a vanish having a low dielectric loss tangent, by reacting respective specific amounts of a cyanate ester type compound and a phenolic compound, in the presence of a metal-containing reaction catalyst, in a solution of a polyphenylene ether resin in an aromatic hydrocarbon type solvent prepared by heating and dissolution of the resin in the solvent, to thereby produce a solution of a uniform blend of resins, and then adding with agitation a ketone type solvent into the resulting solution to thereby form a suspension of the uniform blend of resins. SOLUTION: In a solution which has been prepared by heating and dissolving a polyphenylene ether resin in an aromatic hydrocarbon type solvent, a cyanate ester type compound of formula I and a phenolic compound of formula II are reacted in the presence of a metal-containing reaction catalyst (for example, cobalt naphthenate), to thereby produce a solution in which a uniform blend of a modified cyanate ester resin and a polyphenylene ether resin is dissolved. A ketone type solvent is then added to the solution with agitation to produce a suspension of the above uniform blend of resins. In above formulae, R1 is -CH2 -, -CH(CH3 )- or the like; R2 and R3 are each is H or CH3 ; and R4 is CH3 , C2 H5 or CH2 -CH(CH3 )3 .

    MODIFIED CYANATE ESTER RESIN VANISH FOR PRINTED CIRCUIT BOARD AND PREPARATION THEREOF
    23.
    发明专利
    MODIFIED CYANATE ESTER RESIN VANISH FOR PRINTED CIRCUIT BOARD AND PREPARATION THEREOF 失效

    公开(公告)号：JPH1121504A

    公开(公告)日：1999-01-26

    申请号：JP17957197

    申请日：1997-07-04

    Applicant: HITACHI CHEMICAL CO LTD

    Inventor： SASE SHIGEO ,  MIZUNO YASUYUKI ,  SUGIMURA TAKESHI ,  NEGISHI HARUMI

    IPC: C07D251/34 ,  B32B5/28 ,  C08G73/06 ,  C08K5/03 ,  C08K5/13 ,  C08K5/24 ,  C08K5/3477 ,  C08L79/00 ,  C09D7/12 ,  C09D171/12 ,  C09D179/00 ,  C09K21/10 ,  H05K1/03

    Abstract: PROBLEM TO BE SOLVED: To obtain a vanish having a low dielectric constant, by reacting respective specific amounts of a cyanate ester type compound and a phenolic compound, in the presence of a metal-containing reaction catalyst, in a solution of a polyphenylene ether resin in an aromatic hydrocarbon type solvent prepared by heating and dissolution of the resin in the solvent, to thereby produce a solution of a uniform blend of resins, and then adding with agitation a ketone type solvent into the resulting solution to thereby form a suspension of the uniform blend of resins. SOLUTION: In a solution which has been prepared by heating and dissolving a polyphenylene ether resin in an aromatic hydrocarbon type solvent, a cyanate ester type compound of formula I and a phenolic compound of formula II are reacted in the presence of a metal-containing reaction catalyst (for example, cobalt naphthenate), to thereby produce a solution in which a uniform blend of a modified cyanate ester resin and a polyphenylene ether resin is dissolved. A ketone type solvent is then added to the solution with agitation to produce a suspension of the above uniform blend of resins. In above formulae, R1 is -CH2 - or the like; R2 and R3 are each H or CH3 ; R4 and R5 are each H or a 1-4C alkyl; and n is 1 to 2.

    MAGNETIC RECORDING MEDIUM
    27.
    发明专利
    MAGNETIC RECORDING MEDIUM 失效

    公开(公告)号：JPH06208716A

    公开(公告)日：1994-07-26

    申请号：JP32318892

    申请日：1992-12-02

    Applicant: KONISHIROKU PHOTO IND ,  TDK CORP

    Inventor： ITO TAKESHI ,  NAKANO YASUSHI ,  MATSUZAWA TAKAHIRO

    IPC: G11B5/66 ,  C09D127/06 ,  C09D167/00 ,  C09D169/00 ,  C09D171/12 ,  C09D177/00 ,  C09D183/04 ,  G11B5/738

    Abstract: PURPOSE:To obtain a magnetic recording medium having excellent abrasion resistance and corrosion resistance by forming a water insoluble resin layer in specified thickness, a water insoluble resin layer in specified thickness containing fillers having fixed particle size on the water insoluble resin layer and a constituting layer comprising a ferromagnetic metallic thin-film layer onto the surface of a nonmagnetic supporter on the side, where a magnetic recording constituting layer is formed. CONSTITUTION:Water insoluble resin layers 6, 7 are shaped onto a nonmagnetic supporter 1, and a magnetic layer 2 and a protective layer 4 are formed onto the layer 7. A back coating layer 3 and a lubricating layer 5 are often formed. The resin layer 6 is formed in thickness of 0.05-1.0mum and the resin layer 7 in thickness of 0.0005-0.05mum, and silica having particle size of 0.01-0.1mum is contained in the resin layer 7 as fillers. The magnetic layer 2 is shaped through a vacuum deposition method, etc., in thickness of 500-10000Angstrom from Fe, Co, a Co-Ni alloy, etc. Accordingly, a magnetic recording medium having high abrasion resistance and strong corrosion resistance is acquired.

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