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    41.
    发明专利
    未知

    公开(公告)号：DE59600015D1

    公开(公告)日：1997-08-28

    申请号：DE59600015

    申请日：1996-03-21

    Applicant: BASF AG

    Inventor： GUENTHERBERG NORBERT ,  HOFMANN JUERGEN ,  OHLIG HILMAR ,  MAILAHN ELMAR ,  BUS KLAUS ,  CZAUDERNA BERNHARD ,  GRABOWSKI SVEN

    IPC: B29B7/88 ,  B29B7/48 ,  B29B7/58 ,  B29B13/06 ,  B29C47/40 ,  B29C48/395 ,  B29C48/76 ,  C08G85/00 ,  C08J3/20 ,  C08J3/205 ,  C08L25/04 ,  C08L27/06 ,  C08L33/04 ,  C08L33/12 ,  C08L33/18 ,  C08L33/20 ,  C08L51/00 ,  C08L51/04 ,  C08L55/02 ,  C08L101/00 ,  B29C47/38 ,  B29C47/76

    Abstract: A process is claimed for the prodn. of impact-modified thermoplastics (I) by (a) mechanical dehydration of a moist elastomer component (A) contg. up to 60 wt% residual water and (b) mixing the dried elastomer obtd. (A') with a thermoplastic polymer (B) in a screw machine. The process is carried out in a twin screw extruder with synchronous double-threaded screws and with the following sequence in the direction of feed: (1) a metering section for introducing component (A) into the extruder via a metering device, (2) squeezing section(s) for removing the water, with accumulator element(s) and associated water outlet(s), (3) section(s) fitted with a feeder screw or with mixing, kneading and/or other plasticising elements, (4) section(s) in which polymer (B) is added as a melt, (5) section(s) fitted with mixing, kneading and/or other plasticising elements, (6) degassing section(s) with gas outlets, in which residual water is removed as vapour, and (7) a discharge zone. The water emerging from the outlets in section (2) is partly or completely in the liq. phase, and the extruder is operated at a screw speed of 50-600 r.p.m., with a mean shear rate of 20-240 s . Also claimed are impact-modified thermoplastic moulding materials (I) obtd. by this process.

    THERMOPLASTGRANULATE
    42.
    发明专利
    THERMOPLASTGRANULATE 未知

    公开(公告)号：DE502004006130D1

    公开(公告)日：2008-03-20

    申请号：DE502004006130

    申请日：2004-03-10

    Applicant: BASF AG

    Inventor： GUENTHERBERG NORBERT ,  CZAUDERNA BERNHARD ,  SAUER MICHAEL ,  BARDON RAINER ,  AN YOHWAN

    IPC: B29B9/12 ,  B29B9/06

    Abstract: Granule surface contours include less than 10% concave locations, the remainder being convex, as determined by incident-light interference contrast spectroscopy. Independent claims are included for the following: (1) a method of manufacturing polymer granules comprising forcing a polymer melt through a nozzle into a cutting chamber flooded with coolant and dividing the polymer; (2) a method of manufacturing moldings, film or fibers; and (3) a method of quality control employing incident light interference contrast spectroscopy to measure and control concave inclusions in their surfaces. The interval between emerging from the nozzle and cutting to granules is less than 20 ms. The granules are cooled in liquid coolant to a temperature of 60-130[deg]C at a rate of 2-30[deg]C/s. Granule/coolant ratio is 0.03:1 to 0.12:1. Coolant is introduced into the chamber at a pressure of 1.1 bar. The quality control method, without consideration of granule surface curvature, determines ring-shaped reflections arising from concave locations, and the surface area they enclose. These areas are expressed as a ratio of the total observed surface area.

    43.
    发明专利
    未知

    公开(公告)号：DE50210766D1

    公开(公告)日：2007-10-04

    申请号：DE50210766

    申请日：2002-09-20

    Applicant: BASF AG

    Inventor： GUENTHERBERG NORBERT ,  CZAUDERNA BERNHARD ,  SAUER MICHAEL ,  BARDON RAINER ,  AN YOHWAN

    IPC: B29C48/395 ,  B29C48/76

    Abstract: The extruder has one or more degassing openings which are fitted with either a woven metal wire mesh, a finely perforated plate or a slit screen. Water is extracted either partially or completely in the fluid state. At least one dewatering opening is located upstream in front of a first metering unit and another downstream from the latter. Meshes are held in a frame pressed against the openings and in particular are folded onto an opening or attached to the latter by a bayonet connection. A preferred extruder has twin screws and: a) one or more metering sections in which thermoplastic material containing water or another vaporizable fluid is fed into the barrel and one or more dewatering openings; b) a compression section for dewatering a thermoplastic and including a restrictor and a dewatering opening; c) a feed section in which further thermoplastic melt is added; d) a mixing, kneading and/or plasticizing section; e) a degassing section in which residual water is extracted as steam via a dewatering opening; f) a metering section. All dewatering openings are fitted with a woven mesh, fine perforated plate or slit screen. Initial thermoplastic components contain not more than90wt% and are mixed with additional components while degassing and dewatering. Independent claims are included for: a) a process for manufacturing thermoplastics in which thermoplastic materials are fed into the claimed equipment, degassed and then metered; b) use of a metal wire mesh, fine perforated plate and/or slit screen for covering a degassing and/or dewatering opening in the claimed extruder.

    44.
    发明专利
    未知

    公开(公告)号：AT366280T

    公开(公告)日：2007-07-15

    申请号：AT05701330

    申请日：2005-02-03

    Applicant: BASF AG

    Inventor： STORK MARTIN ,  WEBER MARTIN ,  GOTTSCHALK AXEL ,  RIECHERS SVEN ,  GUENTHERBERG NORBERT ,  FISCHER WOLFGANG ,  LEBER LUDGER ,  ITTEMANN PETER ,  JUENGLING STEPHAN ,  DUIJZINGS WIL

    IPC: C08L51/04 ,  C08F279/02 ,  C08F279/04 ,  C08F285/00 ,  C08L55/02

    Abstract: The invention relates to thermoplastic moulding materials containing a mixture of (A) between 30 and 69 wt. %, in relation to the sum of the constituents (A), (B) and (C), of a methylmethacrylate polymer, (B) between 30 and 69 wt. %, in relation to the sum of the constituents (A), (B) and (C), of a copolymer that can be obtained by the polymerisation of a vinylaromatic monomer and a vinylcyanide, and (C) between 1 and 40 wt. %, in relation to the sum of the constituents (A), (B) and (C), of a graft copolymer that can be obtained from (C1) between 60 and 90 wt. %, in relation to (C), of a core, (C2) between 5 and 20 wt. %, in relation to (C), of a first graft envelope consisting of a vinylaromatic monomer, an alkylmethacrylate and optionally a cross-linking monomer, and (C3) between 5 and 20 wt. %, in relation to (C), of a second graft envelope consisting of an alkyl(meth)acrylate polymer, on the proviso that the quantitative ratio of (C2) to (C3) is between 2:1 and 1:2. The invention is characterised in that the average particle size D50 of the core (C1) is between 50 and 250 nm, the average particle size D90 of the core (C1) is between 60 and 1000 nm, the average particle size D90 of the core (C1) being larger than the average particle size D50 of the core (C1), by a factor between 1.15 and 20, and the core (C1) can be obtained by the polymerisation of a monomer mixture comprising (C11) between 65 and 89 wt. %, in relation to (C1), of a 1,3-diene, (C12) between 10 and 34.9 wt. %, in relation to (C1), of a vinylaromatic monomer, and (C13) between 0.1 and 5 wt. %, in relation to (C1), of an agglomeration polymer. The invention also relates to a method for producing said moulding masses, to the use thereof, and to the moulded bodies obtained therefrom.

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