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    11.
    发明专利
    未知

    公开(公告)号：DE3234034A1

    公开(公告)日：1984-03-15

    申请号：DE3234034

    申请日：1982-09-14

    Applicant: BASF AG

    Inventor： HAMBRECHT JUERGEN DR ,  REFFERT RUDI WILHELM ,  ECHTE ADOLF DR ,  SWOBODA JOHANN DR

    IPC: C08G65/46 ,  C08G65/44

    Abstract: A process for the preparation of high molecular weight polyphenylene ethers from alkyl-substituted monohydric phenols by an oxidative coupling reaction with oxygen in the presence of a catalyst complex of a copper salt and an organic amine, subsequent stopping of the reaction and removal of the metal component of the catalyst by addition of chelating and/or salt-forming agents, wherein the polymer solution is treated with a compound having the general structure: where R2 and R3 can be identical or different and each is OH, NH2, NHR5, where R5 is alkyl or cycloalkyl, or SH, and where R1 and R4 are identical or different, being hydrogen, alkyl, cycloalkyl, aryl, carbonyl, carboxyl, carboxyalkyl or nitrile, and can be linked to form a ring, advantageously in an amount of from 0.1 to 100 mmoles and advantageously in from 1 to 20% strength aqueous solutions.

    12.
    发明专利
    未知

    公开(公告)号：DE3228662A1

    公开(公告)日：1984-02-02

    申请号：DE3228662

    申请日：1982-07-31

    Applicant: BASF AG

    Inventor： HAMBRECHT JUERGEN DR ,  REFFERT RUDI WILHELM ,  MUENCH VOLKER DR ,  ECHTE ADOLF DR ,  SWOBODA JOHANN DR

    IPC: C08G65/46 ,  C08G65/44

    Abstract: High molecular weight polyphenylene ethers are prepared from monohydric phenols by an oxidative coupling reaction with oxygen in the presence of a catalyst complex obtained from a copper salt and an organic amine by a method wherein the metal component of the catalyst is separated off, after the polymerization, by the addition of a polymeric polycarboxylic acid which is essentially composed of unsaturated monofunctional or difunctional carboxylic acids and/or their anhydrides. Advantageously, the polymeric polycarboxylic acids used are homopolymers or copolymers of (a) from 50 to 100% by weight of one or more unsaturated monofunctional acids of 3 to 10 carbon atoms and/or one or more difunctional acids or their anhydrides of 4 to 6 carbon atoms and from 0 to 50% by weight of one or more monomers which do not possess an acid function and can be copolymerized with (a).

    TREATMENT PROCESS FOR (CO)POLYMERS TO ELIMINATE REST MONOMERS
    15.
    发明专利
    TREATMENT PROCESS FOR (CO)POLYMERS TO ELIMINATE REST MONOMERS 未知

    公开(公告)号：DE3365251D1

    公开(公告)日：1986-09-18

    申请号：DE3365251

    申请日：1983-04-21

    Applicant: BASF AG

    Inventor： REFFERT RUDI WILHELM ,  HAMBRECHT JUERGEN DR ,  JUNG RUDOLF H DR ,  ECHTE ADOLF DR

    IPC: C08F6/00 ,  C08F6/10 ,  C08F6/16 ,  C08F6/24 ,  C08F6/28

    Abstract: (Co)polymers which are composed of one or more monomers from the group comprising (a) the vinyl-aromatic monomers and (b) the ethylenically unsaturated monomers and furthermore contain one or more monomer components (a) or (b), or (a) and (b), as unreacted residual monomers are treated at above the glass temperature of the (co)polymer and in the presence of one or more assistants, which have been added to the (co)polymer. The assistant used is a bicyclic compound of the general formula I where X is a methylene, ethylene, 1,1-ethenyl, 1,2-ethenyl, carbonyl, azo, amino, ether or thioether group which is unsubstituted or substituted by halogen, alkyl, alkenyl, cycloalkyl, aryl, carboxyl, carboxyalkyl, an ether group or a thioether group, R1, R2, R3 and R4 are each hydrogen, halogen, alkyl, alkenyl, cycloalkyl, aryl, carboxyalkyl or nitrile, R5 and R6 are each hydrogen, halogen, alkyl or carboxyalkyl, and R7 and R8 are each hydrogen, halogen, alkyl, alkenyl, aryl, carboxyalkyl, carboxyl or nitrile.

    19.
    发明专利
    未知

    公开(公告)号：NO770026L

    公开(公告)日：1977-08-22

    申请号：NO770026

    申请日：1977-01-05

    Applicant: BASF AG

    Inventor： FINK PETER ,  WILD HANS ,  ZIZLSPERGER JOHANN ,  REFFERT RUDI WILHELM ,  THIELEN GUNTER

    IPC: B01D1/22 ,  B01D19/00 ,  B29B13/02 ,  C08F6/10 ,  F28F7/02 ,  C08F

    Abstract: A process for removing vaporizable constituents from high-viscosity solutions or melts of thermoplastics by continuous evaporation along a heated devolatilization zone and separation of the vapor phase from the liquid phase in a downstream separating vessel. The plastic solution or melt is first heated stepwise in increments, in the devolatilization zone, while the product is in the form of thin layers from about 0.5 to 4 mm, so as to maintain a temperature difference of less than 50 DEG C. between the heat transfer medium and the plastic solution or melt until the devolatilization temperature is reached, the distribution of the solution or melt to form thin layers of product taking place while the temperature conditions still correspond to those of the feed of solution or melt, after which the vaporizable constituents are evaporated so as to form a two-phase system of vapor and melt, and the heat of evaporation absorbed is substantially returned to the product during the evaporation along the devolatilization zone. The process permits the removal of vaporizable constituents under mild conditions.

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