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    2.
    发明专利
    未知

    公开(公告)号：DE19524182A1

    公开(公告)日：1997-01-09

    申请号：DE19524182

    申请日：1995-07-03

    Applicant: BASF AG

    Inventor： FISCHER WOLFGANG DR ,  BAUMGAERTEL MICHAEL DR

    IPC: C08F2/00 ,  B01J19/00 ,  B01J19/24 ,  C08F2/02 ,  C08F2/04 ,  C08F212/08 ,  C08F220/12 ,  C08F220/44

    Abstract: The novel features in bulk or soln. polymerisation (esp. styrene/acrylonitrile copolymer mfr.) involving feed of the reaction components to a recycle reactor are that: (a) the reactor has at least one tubular bundle reactor (1) with straight or upright tubes sprinkled with a fluid heat-exchange medium; and (b) each tubular bundle reactor (1) consists of at least two tubular bundle heat exchangers (1A, 1B) linked to each other via at least one intermediate mixing zone, pref. a static mixer (12). The appts. is also claimed per se.

    4.
    发明专利
    未知

    公开(公告)号：DE19748833A1

    公开(公告)日：1999-05-06

    申请号：DE19748833

    申请日：1997-11-05

    Applicant: BASF AG

    Inventor： FISCHER WOLFGANG DR ,  BAUMGAERTEL MICHAEL DR ,  LOTH WOLFGANG DR ,  SCHADE CHRISTIAN DR ,  WITTSTOCK KLAUS DR

    IPC: B01J19/24 ,  C08F2/00 ,  C08F36/04 ,  C08F36/00

    Abstract: The invention relates to a continuous method for producing slightly gelified diene rubber, through anionic polymerisation or copolymerisation of a diene and, optionally, of a vinyl aromatic compound, in a tubular reactor. The method is characterised in that the reaction is performed at a pressure greater than the atmospheric pressure, in a hydraulically filled closed loop reactor (recirculation reactor) composed of tubular reactor members, and in that the method parameters are selected so that the concentration in diene monomers in the reaction mixture in a spatial medium is lower than 10 % wt.

    7.
    发明专利
    未知

    公开(公告)号：DE19638094A1

    公开(公告)日：1998-03-19

    申请号：DE19638094

    申请日：1996-09-18

    Applicant: BASF AG

    Inventor： HUNGENBERG KLAUS-DIETER DR ,  BAUMGAERTEL MICHAEL DR ,  KOCH JUERGEN DR ,  FISCHER WOLFGANG DR ,  THIELE REINER PROF DR

    IPC: B01J19/24 ,  C08F2/02 ,  C08F20/14

    Abstract: The invention concerns methyl-methacrylate polymers with an heterogeneity of 1.0 to 1.2. Said polymers are obtained continuously by polymerization of monomers consisting of no less than 90 % by weight methyl-methacrylate in a recycle reactor, which has preferably at least a tubular reactor or a multitube-flow reactor, avoiding unwarranted wall deposits. Said polymers are produced in such a way that temperature during polymerization stands at 135-150 DEG C, the recycle relation is bigger than 20 when divided by the number of chargings per circulation loop, the mean effective axial circulation is faster than 5 cm/s, a polymerization initiator having a batch half change value of 3 to 10 min. is used, and the inflow concentration of the initiator is set in such a way that by a mean residence time of 1.3 to 2.5 hours a polymer rupture of 0.50 to 0.70 at the output of the reactor is achieved. Preforms having very good optical properties can be produced with the homogeneous polymers.

    8.
    发明专利
    未知

    公开(公告)号：DE19701865A1

    公开(公告)日：1998-07-23

    申请号：DE19701865

    申请日：1997-01-21

    Applicant: BASF AG

    Inventor： FISCHER WOLFGANG DR ,  BAUMGAERTEL MICHAEL DR ,  GAUSEPOHL HERMANN DR ,  HASENBEIN NORBERT DR ,  KICK ROLF ,  LOTH WOLFGANG DR ,  WARZELHAN VOLKER DR

    IPC: B01J19/18 ,  B01J19/24 ,  C08F279/02 ,  B29B15/00 ,  C08F212/08 ,  C08F236/06

    Abstract: The invention concerns a process for continuously producing impact-resistant modified thermoplastic moulding compounds which contain a rubber-elastic soft phase dispersed in a vinylaromatic hard matrix. In a first reaction zone the rubber necessary for forming the soft phase is polymerized anionically in solution substantially without re-mixing until the reaction is complete. The rubber is fed, directly or after the addition of a breaking or coupling agent, to a second reaction zone in which it is polymerized until the phases are inverted with the addition of an amount of vinylaromatic monomer sufficient for phase inversion and a further anionic initiator. In a third reaction zone polymerization is terminated anionically with as many vinylaromatic monomers as are required to form the impact-resistant modified thermoplastic moulding compound.

    9.
    发明专利
    未知

    公开(公告)号：DE19646066A1

    公开(公告)日：1998-05-14

    申请号：DE19646066

    申请日：1996-11-08

    Applicant: BASF AG

    Inventor： JUENGLING STEPHAN DR ,  GAUSEPOHL HERMANN DR ,  WEIS HORST DR ,  BAUMGAERTEL MICHAEL DR

    IPC: C08F4/46 ,  C08F4/48 ,  C08F4/50 ,  C08F12/00

    Abstract: Initiator systems for anionic polymerization of vinyl monomers with polar groups, containing A) a1) at least one starter having general formula R -M or R -M -RC, wherein R , R or R independently stand for branched or straight-chain alkyl radicals of 1-6 carbon atoms, aryl radicals of 6-20 carbon atoms or alkyl radicals with 1-6 carbon atoms carrying at least one phenyl radical and M stands for a metal selected from the group of alkaline metals, and M stands for a metal selected from the group of alkaline earth metals, or a2) as a starter "living" polymer chains, whose chain ends are possibly stabilized by sterically demanding and/or aromatic radicals and B) at least one alkaline (I) or alkaline earth metal alcoholate (II) or at least one alkaline (I) and at least one alkaline earth metal alcoholate (II) which have at least one amino or one phosphino substituent or at least one amino and one phosphino substituent.

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