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    Appts. for the polymerisation of vinyl] monomers - by utilising remixing process cycle with monomer added during the reaction via at least three feed points
    22.
    发明专利
    Appts. for the polymerisation of vinyl] monomers - by utilising remixing process cycle with monomer added during the reaction via at least three feed points 未知

    公开(公告)号：DE4240983A1

    公开(公告)日：1994-06-09

    申请号：DE4240983

    申请日：1992-12-05

    Applicant: BASF AG

    Inventor： BRANDSTETTER FRANZ DR ,  WITTMER PAUL PROF DR ,  THIELE REINER PROF DR

    IPC: B01J19/24 ,  C08F2/00

    Abstract: Process for the prepn. of copolymers of radical-polymerisable vinyl monomers having vastly different copolymerisation parameters, by polymerisation under conditions that avoid a change in concn. with increasing polymer mass fraction, and where one or more monomers are added during at least part of the reaction. The process is characterised by the use of a cycle reactor having an essentially remixing operating ratio as a polymerisation vessel, with the monomer(s) being added to the reactor at 3 or more different positions. The no. of feed positions, N, is given by equation N is at least Yp/(deltaYP,Z.Kr) (I) Yp = polymer mass fraction of the reacted mixt.; delta Yp,z = difference in polymer mass fraction between two consequent feed positions; and Kr = cycle ratio. USE/ADVANTAGE - Suitable for the polymerisation of the following monomer pairs: acrylonitrile-vinyl acetate, methylmethacrylate-maleinimide and styrene-ethyl acetate. The process avoids the need for high solvent and/or initiator concns. which reduce the rate of polymerisation, increases the area of cooling surface without creating dead zones, improves the homogeneity of the reaction mixt. and requires less powerful mixing performance.

    25.
    发明专利
    未知

    公开(公告)号：DE3682918D1

    公开(公告)日：1992-01-30

    申请号：DE3682918

    申请日：1986-02-20

    Applicant: BASF AG

    Inventor： ZIEGLER WALTER DR ,  BRANDSTETTER FRANZ DR ,  WEISS FRANK DR ,  SCHLEMMER LOTHAR

    IPC: C08J3/205 ,  C08J3/24 ,  C08K5/09 ,  C08K5/098 ,  C08L23/08

    Abstract: Prepn. of ionically crosslinked ethylene copolymers is claimed. Ethylene copolymers contg. 0.1-20 mol.% comonomers carrying alpha, beta-ethylenically unsatd.carboxylic acids or carboxylic gps. are homogeneously mixed with a water soluble metal salt at temp. higher than the melt. pt. of the ethylene copolymer. The melted copolymer and the aq. soln. of the metal salt are mixed in a mixing zone of a twin extruder at 140-200 deg.C followed by increasing the temp. of the mixt. up to 230 deg.C in the next. zone. The concn. of the metal salt in the aq. soln. is pref. at least 10 wt.%. The temp. of the mixing zone = 160-180 deg.C and that of the next zone = 200-225 deg.C.

    Thermoplastic moulding composition based on polysulphone resins, polycarbonates, styrene- and acrylonitrile-containing copolymers and a graft copolymer
    29.
    发明专利
    Thermoplastic moulding composition based on polysulphone resins, polycarbonates, styrene- and acrylonitrile-containing copolymers and a graft copolymer 未知

    公开(公告)号：DE3601418A1

    公开(公告)日：1987-07-23

    申请号：DE3601418

    申请日：1986-01-20

    Applicant: BASF AG

    Inventor： MITULLA KONRAD DR ,  BRANDSTETTER FRANZ DR ,  HEINZ GERHARD DR ,  SEILER ERHARD DR ,  HAMBRECHT JUERGEN DR ,  BLINNE GERD DR

    IPC: C08L81/06 ,  C08L25/12 ,  C08L51/04 ,  C08L69/00

    Abstract: The invention relates to a thermoplastic moulding composition containing A from 20 to 80% by weight of a thermoplastic polysulphone resin (polyarylene-polyether-polysulphone), B from 10 to 60% by weight of a polycarbonate, C from 5 to 50% by weight of at least one copolymer based on c1) at least one vinylaromatic monomer from the group consisting of styrene, alpha -methylstyrene and p-methylstyrene, or mixtures thereof, and c2) acrylonitrile, and D from 5 to 50% by weight of at least one graft copolymer comprising, in each case based on C, d1) from 50 to 90% by weight of at least one elastomer (rubber) and d2) from 10 to 50% by weight of at least one shell grafted onto the elastomer, is characterised in that the copolymer C used contains, based on C, from 88 to 73% by weight of the vinylaromatic monomer c1) and from 12 to 27% by weight of acrylonitrile c2) in copolymerised form, and the viscosity indices are in the range from 50 to 100, and that furthermore, a graft copolymer D having a mean particle size in the range from 80 to 500 nm is used whose elastomer d1) contains, in copolymerised form, d11 at least 80% by weight of butadiene and d12 from 0 to 20% by weight of styrene and/or acrylonitrile, and whose shell c2 contains, based thereon, d21 from 90 to 10% by weight of styrene and d22 from 10 to 90% by weight of methyl methacrylate. The moulding composition is used for the production of mouldings.

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