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    Process for the preparation of thermoplastic copolymers
    1.
    发明专利
    Process for the preparation of thermoplastic copolymers 未知

    公开(公告)号：DE3430247A1

    公开(公告)日：1986-02-27

    申请号：DE3430247

    申请日：1984-08-17

    Applicant: BASF AG

    Inventor： REFFERT RUDI WILHELM ,  HAMBRECHT JUERGEN DR ,  JUNG RUDOLF H DR ,  SCHAECH HANSJOERG ,  GAUSEPOHL HERMANN DR ,  SIEBEL PETER DR ,  SCHWAAB JOSEF DR ,  ECHTE ADOLF DR

    IPC: C08F212/00 ,  C08F212/08

    Abstract: The invention relates to a process for the preparation of thermoplastic copolymers by continuous polymerisation of a mixture of a) a vinylaromatic monomer and b) a monomer from the group consisting of nitriles and esters of (meth)acrylic acid and of maleic anhydride, in bulk or in solution in the presence of small amounts of water, it being possible for an elastomer having a glass transition temperature of below 0 DEG C which may already be dissolved in the mixture or the components of the mixture to be present, in at least one mixed (stirred) reactor under steady-state conditions with dissipation of the heat of reaction by evaporative cooling, and subsequent discharge of the reaction products from the reactor and conventional isolation of the copolymers and recovery of the unreacted monomers, alone or together with a solvent, if one was used, and recycling thereof into the reactor together with the mixture of a) and b), where the polymerisation is carried out with the proviso that from 1 to 25% by weight of steam, based on the gases present in the vapour space of the reactor, are present in the vapour space and the reactor discharge contains less than 0.1% by weight of water.

    5.
    发明专利
    未知

    公开(公告)号：DE3578428D1

    公开(公告)日：1990-08-02

    申请号：DE3578428

    申请日：1985-11-07

    Applicant: BASF AG

    Inventor： BRANDT HERMANN DR ,  FISCHER HERMANN DR ,  DREHER HERMANN DR ,  HEIL EDUARD ,  HAMBRECHT JUERGEN DR ,  NAARMANN HERBERT DR ,  ECHTE ADOLF DR ,  GAUSEPOHL HERMANN DR ,  SIEBEL PETER DR ,  SWOBODA JOHANN DR ,  SCHWOEBEL GERD ,  NIKLES ALBERT

    IPC: B01J10/00 ,  B01J19/18 ,  C08G65/44

    Abstract: Polyphenylene ethers are prepared from monohydric phenols, which possess alkyl substituents in the two ortho-positions and, if desired, in the meta-position, but not in the para-position, by an oxidative coupling reaction with oxygen at from 15 DEG to 50 DEG C. and under from 1 to 10 bar in the presence of a catalyst complex, of a solvent and, if required, of an activator, by a method in which the conversion of the phenols is carried out in two more reaction zones, in which some or all of the solvent, the catalyst complex and the phenols and, where relevant, the activator is initially taken and is circulated by means of a conveying unit, and about 60-100% of the stoichiometric amount of oxygen required for the oxidative coupling is introduced into the first reaction zone and from 0 to about 40% of the said stoichiometric amount is introduced into the second reaction zone.

    PROCESS FOR REMOVING CATALYSTS FROM POLYPHENYLENE ETHERS
    7.
    发明专利
    PROCESS FOR REMOVING CATALYSTS FROM POLYPHENYLENE ETHERS 未知

    公开(公告)号：DE3462510D1

    公开(公告)日：1987-04-09

    申请号：DE3462510

    申请日：1984-07-03

    Applicant: BASF AG

    Inventor： BERGER ROSEMARIE ,  DREHER HERMANN DR ,  HAMBRECHT JUERGEN DR ,  HEIL EDUARD ,  REFFERT RUDI WILHELM ,  SWOBODA JOHANN DR ,  ECHTE ADOLF DR ,  SIEBEL PETER DR

    IPC: C08G65/46

    Abstract: The catalyst is removed in the preparation of high molecular weight polyphenylene ethers from monohydric phenols, which are alkyl-substituted at the two ortho-positions but not at the para-position and may or may not be alkyl-substituted at the meta-position, by an oxidative coupling reaction with oxygen at from 15 DEG to 50 DEG C. in the presence of a catalyst complex obtained from a copper salt and an organic amine, in the presence of from 1 to 20 parts by weight of a solvent per part by weight of the monomeric phenol, and in the presence or absence of an activator, and removal of the metal component of the catalyst from the polyphenylene ether solution with a complex-forming or chelate-forming compound in aqueous solution, in the presence or absence of reducing and stabilizing substances and assistants for accelerating the interphase reactions and for phase separation, by a method in which the continuous removal of the copper catalyst is carried out in one or more mixer-settler stages at a phase volume ratio of the organic phase to the aqueous phase of from 1:0.1 to 1:1.0, preferably from 1:0.4 to 1:0.6.

    THERMOPLASTIC MOULDING COMPOSITIONS
    10.
    发明专利
    THERMOPLASTIC MOULDING COMPOSITIONS 未知

    公开(公告)号：DE3561736D1

    公开(公告)日：1988-04-07

    申请号：DE3561736

    申请日：1985-04-01

    Applicant: BASF AG

    Inventor： MITULLA KONRAD DR ,  HAMBRECHT JUERGEN DR ,  ECHTE ADOLF DR ,  SWOBODA JOHANN DR ,  SIEBEL PETER DR ,  SCHWAAB JOSEF DR ,  FRANK HERBERT

    IPC: C08L51/00 ,  C08L51/04 ,  C08L69/00

    Abstract: A thermoplastic molding material consists of a polycarbonate A and a graft copolymer B, the latter consisting of an elastomer (rubber) (b1) and a shell (b2) grafted onto the elastomer. The elastomer (b1) contains, as copolymerized units, from 35 to 100% by weight of a diene from the group consisting of the conjugated dienes of 4 to 5 carbon atoms, and can contain, as copolymerized units, from 0 to 65% by weight of a monomer from the group consisting of the alkyl acrylates or alkyl methacrylates, where alkyl is of 1 to 8 carbon atoms. The shell (b2) is obtained in a conventional manner by successive polymerization of the monomers constituting the shell, in two process steps, in the presence of the elastomer (b1); in a first process step, from 10 to 90% by weight of a mixture of a vinylaromatic hydrocarbon and one or more ethylenically unsaturated monomers which differ from the said hydrocarbon, in a weight ratio of from 90:10 to 60:40, are first incorporated as copolymerized units, followed by the polymerization of from 90 to 10% by weight of a monomer from the group consisting of the alkyl acrylates or of the alkyl methacrylates, where alkyl is of 1 to 8 carbon atoms. The molding material is used for the production of shaped articles.

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