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    PROCESS FOR PREPARING DIESTERS OF MALONIC ACID
    1.
    发明专利
    PROCESS FOR PREPARING DIESTERS OF MALONIC ACID 未知

    公开(公告)号：DE3266416D1

    公开(公告)日：1985-10-24

    申请号：DE3266416

    申请日：1982-10-15

    Applicant: UBE INDUSTRIES

    Inventor： ITATANI HIROSHI ,  KASHIMA MIKITO ,  SUEHIRO TSUTOMU

    IPC: B01J31/00 ,  C07B61/00 ,  C07C67/46 ,  C07C69/38

    Abstract: Disclosed is an improved process for preparing diesters of malonic acid by subjecting ketene, carbon monoxide and an ester of nitrous acid to a liquid phase reaction in an organic solvent, in which the reaction is carried out in the presence of a catalyst of a platinum group metal complex represented by the formula: L2MX2 wherein, L represents a ligand selected from the group consisting of triorganophosphines, triorganophosphite and triorganoarsines; M represents a platinum group metal; and X represents a halogen or an acetic acid ion.

    CUBIC NONLINEAR OPTICAL MATERIAL
    3.
    发明专利
    CUBIC NONLINEAR OPTICAL MATERIAL 失效

    公开(公告)号：JPH06102549A

    公开(公告)日：1994-04-15

    申请号：JP25296092

    申请日：1992-09-22

    Applicant: UBE INDUSTRIES

    Inventor： SUEHIRO TSUTOMU ,  MORITA KAZUHIRO ,  YOKOO YASUHIKO ,  ASHITAKA HIDETOMO

    IPC: C09K9/02 ,  G02F1/35 ,  G02F1/355 ,  G02F1/361

    Abstract: PURPOSE:To provide the org. nonlinear optical material which exhibits a high cubic nonlinear optical effect by two-dimensionally expanding a pi conjugation system effective for the cubic nonlinear optical effect. CONSTITUTION:This cubic nonlinear optical material contains the compd. expressed by general formula (where R1 denotes any one kind among a hydrogen atom, alkoxy group, alkyl group, cyano group, nitro group, hydroxyl group and halogen atom; R2 denotes any one kind among an amino group, dialkyl amino group, nitro group, cyano group, dicyanovinyl group, hydroxyl group and halogen atom; Ar denotes any one kind among benzene, naphthalene and anthracene).

    TERTIARY NONLINEAR OPTICAL MATERIAL
    4.
    发明专利
    TERTIARY NONLINEAR OPTICAL MATERIAL 失效

    公开(公告)号：JPH0527281A

    公开(公告)日：1993-02-05

    申请号：JP24425091

    申请日：1991-08-30

    Applicant: UBE INDUSTRIES

    Inventor： ASHITAKA HIDETOMO ,  TANIOKA RIKIO ,  SUEHIRO TSUTOMU ,  ISHII MASAYOSHI

    IPC: C09K9/02 ,  G02F1/35 ,  G02F1/355 ,  G02F1/361

    Abstract: PURPOSE:To allow the use of the above-mentioned tertiary nonlinear optical material as a device material for optical communication, optical information processing, etc., by consisting this material of carbohelicene or heterohelicene to obtain a high tertiary nonlinear characteristic and eliminating the thermal and optical damages by a laser. CONSTITUTION:This nonlinear optical material consists of the carbohelicene or heterohelicene. The carbohelicene is a compd. having a spiral structure connected with >=5 pieces, more preferably 6 to 20 pieces of a rings and the heterohelicene is a compd. consisting of a cocodensed ring of benzene and a heterocycle, such as furan, pyridine or pyrrole, and chiahelicene is not included therein. Further, the carbohelicene or heterohelicene may be attached with various kinds of substituents in its arom. ring or heterocycle. While the method for synthesizing the carbohelicene or heterohelicene is not particularly limited, the carbohelicene or heterohelicene is obtd. by photocyclization of the 1, 2- diarylethyelnes, etc., synthesized by a Witting reaction or Siegrist reaction.

    THERMOPLASTIC AROMATIC POLYIMIDE
    10.
    发明专利
    THERMOPLASTIC AROMATIC POLYIMIDE 失效

    公开(公告)号：JPH0370736A

    公开(公告)日：1991-03-26

    申请号：JP20664289

    申请日：1989-08-11

    Applicant: UBE INDUSTRIES

    Inventor： ASHITAKA HIDEKAZU ,  TANIOKA RIKIO ,  SUEHIRO TSUTOMU

    IPC: C08G73/10

    Abstract: PURPOSE:To provide the subject polyimide giving molded products having excellent mechanical strengths by subjecting an aromatic tetracarboxylic acid component, an aromatic diamine component containing a specific aromatic diamine compound as a main component and an aromatic dicarboxylic anhydride component to a polymerization reaction and subsequently to an imitation reaction. CONSTITUTION:(A) An aromatic tetracarboxylic acid component comprising a 3,3',4,4'-biphenyltetracarboxylic acid and a 2,3,3',4'-biphenyltetracarboxylic acid in a molar ratio of 85:15 to 0:100, (B) an aromatic diamine component mainly comprising an aromatic diamine compound of the formula (n is 0-4) (e.g. a diaminodiphenyl ether) and (C) an aromatic dicarboxylic anhydride component are subjected to a polymerization reaction and subsequently to an imitation reaction to provide the objective polyimide having a reducing viscosity of 0.25-1.0 (in N-methylpyrrolidone, at 30 deg.C, 0.5g/dl) and moldable at

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