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47 records (took 0.022 seconds)

    43.
    发明专利
    未知

    公开(公告)号：DE69922544D1

    公开(公告)日：2005-01-13

    申请号：DE69922544

    申请日：1999-12-07

    Applicant: GEN ELECTRIC

    Inventor： BRAAT J ,  LANDA ADRIE ,  LISKA JURAJ

    IPC: C08G65/46 ,  C08G65/48

    Abstract: The invention relates to methods of capping poly(phenylene ether) resin having an intrinsic viscosity between 0.05 and 0.35 dl/g. More particularly, the methods comprise capping a poly(phenylene ether) resin having an intrinsic viscosity between 0.05 and 0.35 dl/g in a solvent to produce a capped poly(phenylene ether) resin having an intrinsic viscosity between 0.05 and 0.35 dl/g and isolating the capped poly(phenylene ether) resin by removal of the solvent, preferably in a process other than precipitation. The invention also relates to the capped poly(phenylene ether) resin having an intrinsic viscosity between 0.05 and 0.35 dl/g.

    44.
    发明专利
    未知

    公开(公告)号：ES2169588T3

    公开(公告)日：2002-07-01

    申请号：ES99300224

    申请日：1999-01-14

    Applicant: GEN ELECTRIC

    Inventor： WILLEMS GEERT-JAN ,  LISKA JURAJ

    IPC: B01J31/10 ,  C07B61/00 ,  C07C51/353 ,  C07C51/367 ,  C07C59/52 ,  C07C59/56

    Abstract: A method of making a functionalized substituted bisphenol compound of the formula: comprises heating a mixture comprising a 2,6-dimethylphenol and levulinic acid in the presence of an effective amount of a macroreticular ion-exchange resin, optionally with removal of the water of reaction.

    Process for the manufacture of functionalized polyphenylene ethers
    46.
    发明专利
    Process for the manufacture of functionalized polyphenylene ethers 未知

    公开(公告)号：AU2046200A

    公开(公告)日：2000-08-25

    申请号：AU2046200

    申请日：1999-12-07

    Applicant: GEN ELECTRIC

    Inventor： BRAAT ADRIANUS J F M ,  JONGH RENE DE ,  LISKA JURAJ

    IPC: C08G65/48

    Abstract: The invention relates to a novel process for preparing functionalized PPE, the process comprising oxidative coupling in a reaction solution at least one monovalent phenol species using an oxygen containing gas and a complex metal catalyst to produce a PPE; and functionalizing the PPE prior to and/or during at least one isolation step for devolatilization of the reaction solvent. The invention also relates to the polyphenylene ether resin made by the process as well as blends and articles containing the polyphenylene ether resin made by the process.

    REDISTRIBUTION PROCESS OF POLYPHENYL ETHERS AND THE POLYPHENYL ETHERS WITH NEW STRUCTURE
    47.
    发明专利
    REDISTRIBUTION PROCESS OF POLYPHENYL ETHERS AND THE POLYPHENYL ETHERS WITH NEW STRUCTURE 未知

    公开(公告)号：CZ325898A3

    公开(公告)日：1999-08-11

    申请号：CZ325898

    申请日：1998-01-08

    Applicant: GEN ELECTRIC

    Inventor： LISKA JURAJ ,  VAN AERT HUBERTUS ADRIANUS MAR ,  DE WIT GERT

    IPC: C08G65/48

    Abstract: The present invention deals with the distribution of polyphenylene ethers 1. by reacting the polyphenylene ether in solution with a phenolic compound, wherein special phenolic compounds are used. The redistribution reaction can be performed in toluene or in toluene/alcohol blends. The reaction can be run in the presence or the absence of a catalyst. By using a process for the redistribution of polyphenylene ethers by reacting the polyphenylene ether in solution with a phenolic compound, wherein the polyphenylene ether is reacted with a phenolic compound with formula 3 wherein the phenolic rings are disubstituted with methyl groups or ethyl groups in the ortho positions and the group X is separated from the phenolic ring through at least two carbon atoms and the phenolic compound has a molecular weight of not more than 400 g/mol, preferably not more than 300 g/mol and the redistribution is performed in a mixture of toluene and methanol with 1-30 volume % of methanol or in toluene in the presence of a phase transfer catalyst such as tri (C8-C1O alkyl) methyl ammonium chloride as a promoter; and a diphenoquinone, preferably of 3,3',5,5'-tetramethyl-4,4'-diphenoquinone is used as a catalyst and the molar concentration of the phenolic compound is chosen between 0.9 to 1.1 times the molar quantity of monomeric units in the polyphenylene ether in the reaction solution, more than 90% of the phenolic compound can be incorporated in the polyphenylene.

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