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    26.
    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.

    27.
    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).

    30.
    发明专利
    未知

    公开(公告)号：DE3785743D1

    公开(公告)日：1993-06-09

    申请号：DE3785743

    申请日：1987-12-22

    Applicant: BASF AG

    Inventor： SCHWABEN HANS-DIETER DR ,  ECHTE ADOLF DR ,  BUESCHL RAINER DR ,  SCHLICHTMANN RAINER ,  KLAERNER PETER DR ,  KINDLER HUBERT DR

    IPC: C08F2/18 ,  C08F287/00 ,  C08L25/06 ,  C08L51/00

    Abstract: Thermoplastic moulding compsn. contains w.r.t. (A+B), (A) 80-60 (wt.)% rigid polystyrene matrix and (B) 20-40% soft phase, obtd. by polymerising styrene in the presence of a linear styrene-butadiene block copolymer with indistinct transition, which contains 35-45% styrene and 65-55% butadiene with a block polystyrene content of 25-35%. (B) is uniformly distributed in (A) and has a particle dia. of less than 0.8 micron. The average particle dia., d50 value (by vol.) of (B) is 0.252-0.38 micron, the particle size distribution range (d95-d5) value, is 0.2-0.6 micron, the d60 value, is in the 0.26-0.40 micron range and the d90 value is 0.40-0.75. (B) pref. contains 38-42% styrene and 62-58% butadiene with 25-35, esp. 30-32% block polystyrene. The average mol.wt. of (B) is 180000-250000 and the mol.wt. of the styrene block 50000-70000.

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