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    Transparent, thermoplastic moulding composition, process for its preparation, and its use
    3.
    发明专利
    Transparent, thermoplastic moulding composition, process for its preparation, and its use 未知

    公开(公告)号：DE3914812A1

    公开(公告)日：1989-11-23

    申请号：DE3914812

    申请日：1989-05-05

    Applicant: BASF AG

    Inventor： WALTER HANS-MICHAEL DR ,  BRONSTERT KLAUS DR ,  HECKMANN WALTER DR ,  POHRT JUERGEN ,  BENEDIX FRANZ

    IPC: C08L25/06 ,  C08L53/02

    Abstract: The invention relates to a transparent, thermoplastic moulding composition containing, based on A + B, A from 5 to 95% by weight of polystyrene which has been produced in a manner known per se by free-radical polymerisation, B from 95 to 5% by weight of a non-elastomeric block copolymer which is branched in a star-shaped manner, built up from, based on B, b1 from 60 to 95% by weight of styrene and b2 from 5 to 40% by weight of at least one conjugated diene having 4 or 5 carbon atoms, which has been prepared by sequential anionic polymerisation using at least one organolithium compound as initiator and in the presence of a solvent, where firstly, in a first process step, an amount of styrene S1 of from 50 to 80% by weight of the styrene, based on the total amount of styrene, is polymerised in the presence of an amount of initiator I1 and then, in a second process step, a smaller amount of styrene S2 is polymerised with simultaneous addition of a further amount of initiator I2, and, in a third process step of the polymerisation, a mixture of a residual amount of styrene, S3, and the total amount of the diene are reacted, followed by coupling and work-up of the reaction product, characterised in that the amount of initiator I1 in the 1st process step is from 0.05 to 1.0 mmol/100 g of total monomer and that, in the 2nd process step, an amount of styrene S2 of from 12 to 47% by weight of styrene, based on the total amount of styrene, ... in the presence of from 0.5 to 10 mmol/100 g ... Original abstract incomplete.

    4.
    发明专利
    未知

    公开(公告)号：DE3816294A1

    公开(公告)日：1989-11-23

    申请号：DE3816294

    申请日：1988-05-13

    Applicant: BASF AG

    Inventor： WALTER HANS-MICHAEL DR ,  BRONSTERT KLAUS DR ,  GAUSEPOHL HERMANN DR ,  POHRT JUERGEN

    IPC: C08F4/42 ,  C08F4/48 ,  C08F297/04 ,  C08L25/06 ,  C08L53/00 ,  C08L53/02

    Abstract: The invention relates to a transparent, thermoplastic moulding composition containing, based on A + B,… A 5 to 95% by weight of polystyrene and… B 95 to 5% by weight of a non-elastomeric block copolymer with stellate branches, built up from, based on B,… b1 60 to 95% by weight of styrene and… b2 5 to 40% by weight of at least one conjugated diene having 4 or 5 carbon atoms,… prepared in a conventional manner by sequential anionic polymerisation by means of at least one organolithium compound as initiator and in the presence of a solvent, with subsequent coupling, characterised in that component A is produced by conventional anionic polymerisation by means of at least one organolithium compound in the presence of an organic solvent. … The moulding composition is prepared by conventional mixing of components A and B and, if used, C, and is used for the production of mouldings.

    6.
    发明专利
    未知

    公开(公告)号：DE3880792D1

    公开(公告)日：1993-06-09

    申请号：DE3880792

    申请日：1988-11-04

    Applicant: BASF AG

    Inventor： WALTER HANS-MICHAEL DR ,  POHRT JUERGEN ,  GAUSEPOHL HERMANN DR ,  BRONSTERT KLAUS DR ,  BENEDIX FRANZ

    IPC: C08F2/06 ,  C08F297/04

    Abstract: Discontinuous processes (A, B, C) for prepn. of the copolymers (I) contg. polymerised 50-95 wt.% styrene (S) and 50-5 wt.% 4 or 5C conjugated diene (B) on (I) comprise (1) sequential anionic polymerisation of (S) and (B) in presence of solvent using Li-organic cpd. as initiator (Ir), of which minor proportion is added at beginning of sequential polymerisation and major proportion afterwards, the sequentially added (S) and (B) portions each being completely polymerised (2) coupling mixt. of living block copolymer anions of bimodal mol. wt. distribution obtd. by this sequential anionic polymerisation with a polyfunctional coupling agent (3) opt. treatment with proton donor, (4) removal of solvent.

    7.
    发明专利
    未知

    公开(公告)号：DE4018230A1

    公开(公告)日：1991-12-12

    申请号：DE4018230

    申请日：1990-06-07

    Applicant: BASF AG

    Inventor： BLUMENSTEIN UWE DR ,  KLAERNER PETER DR ,  SCHUCH HORST DR ,  WALTER HANS-MICHAEL DR

    IPC: C08L51/04 ,  C08L25/06

    Abstract: The thermoplastic moulding compositions contain - based on the sum of A and B - A: from 75 to 97% by weight of a polystyrene A as the hard matrix, B: from 3 to 25% by weight of a particulate, rubber-elastic (co)polymer B essentially based on butadiene or copolymers thereof, itself comprising - based on B - B1: from 40 to 98% by weight of a (co)polymer B1 having a mean particle size of from 100 to 600 nm, B2: from 2 to 60% by weight of a particle mixture B2 which is itself built up from - based on B2 - B21: from 1 to 60% by weight of a (co)polymer B21 having a mean particle size of from 200 to 1200 nm, and B22: from 40 to 99% by weight of a (co)polymer B22 having a mean particle size of from 1200 to 8000 nm, where the (co)polymer B1 has a capsule particle morphology and the (co)polymers B21 and B22 have a cell and/or entangled particle morphology.

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