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    Production of rubber-modified vinylaromatic polymers
    2.
    发明授权
    Production of rubber-modified vinylaromatic polymers 失效
    生产橡胶改性的乙烯基聚合物

    公开(公告)号：US3658946A

    公开(公告)日：1972-04-25

    申请号：US3658946D

    申请日：1969-05-08

    Applicant: BASF AG

    Inventor： BRONSTERT KLAUS ,  BUCHHOLZ KARL ,  ECHTE ADOLF ,  HOFMANN JUERGEN

    IPC: C08F291/00 ,  C08F279/02 ,  C08F15/00

    CPC classification number: C08F279/02 ,  C08F212/04

    Abstract: PROCESS FOR THE PRODUCTION OF IMPACT-RESISTANT POLYMERS BY THE CONTINUOUS POLYMERIZATION OF A SOLUTION OF A DIENE ELASTOMER OR ELASTOMERIC COPOLYMER OF ETHYLENE AND PROPYLENE, THE STARTING MATERIALS BEING FIRST PARTIALLY POLYMERIZED TO SUCH AN EXTENT THAT THE SOLIDS CONTENT OF THE MIXTURE IS 1.1 TO 2 TIMES THE CONTENT OF DIENE ELASTOMER BUT NOT MORE THAN 16% BY WEIGHT, THEN INTRODUCED INTO AN ISOTHERMAL POLYMERIZATION STAGE WHERE A MIXTURE CONTAINING LESS THAN 50% BY WEIGHT OF SOLIDS IS PREPARED AT A TEMPERATURE OF FROM 50* TO 150*C. WHILE MIXING, WHICH MIXTURE IS TOTALLY POLYMERIZED IN THE DOWNSTREAM CONTINUOUS POLYMERIZATION STAGES AT A TEMPERATURE OF UP TO 250*C. TO GIVE A MIXTURE CONTAINING MORE THAN 60% BY WEIGHT OF SOLIDS, AND THEN FREED IN A CONVENTIONAL MANNER FROM VOLATILE CONSTITUENTS.

    7.
    发明专利
    未知

    公开(公告)号：DE102005054151A1

    公开(公告)日：2007-05-16

    申请号：DE102005054151

    申请日：2005-11-14

    Applicant: BASF AG

    Inventor： GUENTHERBERG NORBERT ,  HOFMANN JUERGEN ,  WASMER KARL-HEINZ ,  LOTH WOLFGANG ,  SCHIERHOLZ JENS-UWE ,  SCHMAUS PAULUS ,  MOURS MARIAN ,  SCHADE CHRISTIAN ,  ITTEMANN PETER ,  HEINEN HARTMUT ,  CZAUDERNA BERNHARD ,  SAUER MICHAEL ,  BARDON RAINER ,  KRUEGER MARCO

    IPC: C08F6/10 ,  B01D1/06 ,  B01D19/00 ,  C08J3/00 ,  F28F1/40

    Abstract: The invention relates to a tube bundle heat exchanger (R) for removing dissolved substances from a polymer solution (P) by degassing, having a bundle of tubes (R) which are arranged parallel to one another and vertically and are fastened at both ends in each case in one tube plate (B), and having a degassing region below the lower tube plate (B), having an insert (1) in each tube (R), which insert (1) narrows the free throughflow cross section through the tube (R), and wherein the polymer solution (P) is supplied into the tubes (R) in a single-phase liquid state, and having a casing space around the tubes (R) which is traversed by a heat carrier, wherein the degassing takes place by means of a pressure drop between the inlet pressure of the polymer solution (P) in the tube bundle heat exchanger (R) and the degassing region, characterized in that each insert (1) is designed in such a way as to generate a pressure step between the inlet pressure and the pressure in the degassing region, by means of which pressure step a predefined low residual content of dissolved substances is obtained in the degassed polymer, and an additional heat input which is necessary for this purpose takes place via the heat carrier into the single-phase liquid polymer solution (P).

    8.
    发明专利
    未知

    公开(公告)号：AT285885T

    公开(公告)日：2005-01-15

    申请号：AT01982395

    申请日：2001-10-04

    Applicant: BASF AG

    Inventor： GUENTHERBERG NORBERT ,  HOFMANN JUERGEN ,  MAILAHN ELMAR ,  OHLIG HILMAR

    IPC: B29B7/38 ,  B29B7/82 ,  B29C47/10 ,  B29C48/38 ,  B29C47/50

    Abstract: The present invention relates to a mixing apparatus at least composed of a screw-based machine S 1 and a screw-based machine S 2 , where S 1 has heating equipment, at least in the plasticizing and homogenizing zone, and where the outlet from S 2 has been connected to the screw-containing barrel of S 1 , within the plasticizing or homogenizing zone of S 1 , a substantive feature of which is that the connection between S 1 and S 2 is brought about by a connector which has cooling equipment effective as far as the inner wall of the screw-containing barrel of S 1 , and to a process for preparing thermoplastically processable molding compositions, in particular additive masterbatches, from at least one thermoplastic component C 1 and at least one component C 2 , where the melting point or decomposition temperature T M C2 of C 2 is lower, by at least about 50° C., than the temperature T H C1 , which is the lower limit of the thermoforming range of C 1 , and where most of C 2 is melted only after contact with C 1.

    9.
    发明专利
    未知

    公开(公告)号：AT279949T

    公开(公告)日：2004-11-15

    申请号：AT02710854

    申请日：2002-02-15

    Applicant: BASF AG

    Inventor： HEIDER WOLFGANG ,  HOFMANN JUERGEN ,  WANIOR MARIOLA ,  FUNK RUEDIGER ,  LICHT ULRIKE ,  EHLE MICHAEL

    IPC: A61F13/49 ,  A61F13/00 ,  A61F13/15 ,  A61F13/472 ,  A61F13/53 ,  A61L15/58 ,  A61L15/60 ,  B05D7/00 ,  B05D7/24 ,  B32B7/12

    Abstract: A process for producing thin absorbent planar structures which may be used in hygiene products such as diapers, incontinence products, wound contact materials or sanitary napkins to absorb body fluids, comprises the steps of: A) producing a mixture of an adhesive in dispersion form and a particulate absorbent by fluidizing the components, B) applying the mixture of adhesive and absorbent uniformly to the surface of one side of a first planar backing material, C) one side of a second planar backing material is applied to the mixture of adhesive and absorbent that is present on the surface of one side of the first planar backing material, so producing a sandwichlike intermediate, and D) the sandwichlike intermediate is processed to the end product at a temperature of at least 90° C., a pressure of from 4 to 50 bar, and a pressing time of from 0.5 to 5 min.

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