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    31.
    发明专利
    未知

    公开(公告)号：DE19503944A1

    公开(公告)日：1996-08-08

    申请号：DE19503944

    申请日：1995-02-07

    Applicant: BASF AG

    Inventor： NIESNER NORBERT DR ,  KNOLL KONRAD DR ,  NAEGELE PAUL ,  WALTER HANS-MICHAEL DR ,  KATHMANN JENS-OTTO

    IPC: A61J1/10 ,  A61J1/20 ,  A61L31/04 ,  C08L53/02 ,  A61L31/00 ,  A61M5/14

    Abstract: A medical moulded part, in particular a component of a transmission system for perfusion or transfusion purposes, is made of a mixture that contains (P1) 0.1 to 100 % by weight of a rubber-elastic block copolymer made of at least one block S that forms a hard phase and contains polymerised units of a vinyl aromatic monomer and of at least one block B/S that forms a soft phase and contains polymerised units of both a vinyl aromatic monomer (S) and a diene (B). The glass transition temperature Tg of block S is higher than 25 DEG C and that of block B/S is lower than 25 DEG C. The phase volume ratio between block S and block B/S is selected so that the hard phase represents 1 to 40 % by volume of the whole block copolymer and the diene less than 50 % by weight of the whole block copolymer. The mixture also contains (P2) 0 to 99.9 % by weight of a thermoplastic and/or duroplastic polymer; and (P3) 0 to 70 % by weight other additives and auxiliary substances. The sum of the percentages by weight of components P1 to P3 equals 100 %.

    32.
    发明专利
    未知

    公开(公告)号：DE19503326A1

    公开(公告)日：1996-08-08

    申请号：DE19503326

    申请日：1995-02-02

    Applicant: BASF AG

    Inventor： NIESNER NORBERT DR ,  KNOLL KONRAD DR ,  NAEGELE PAUL ,  BETZ WALTER DR ,  BUESCHL RAINER DR ,  KATHMANN JENS-OTTO ,  SKUPIN GABRIEL

    IPC: B23B27/08 ,  B32B25/08 ,  C08F297/04 ,  C08J5/18 ,  C08L53/02 ,  B29C47/14 ,  B32B25/14 ,  B32B27/28 ,  C08L101/00

    Abstract: The invention concerns a foil, in particular for food packaging, said foil consisting of a polymer P1 or a mixture containing: P1: 0.1 to 100 wt %. of a rubber-elastic block copolymer P1 comprising at least one block S, which comprises vinylaromatic monomer units, incorporated by polymerization, and which forms a hard phase, and at least one elastomer block B/S, which comprises units, incorporated by polymerization, both of a vinylaromatic monomer (S) and of (B), and which forms a soft phase, the glass transition temperature Tg of the block S being more than 25 DEG C and that of the block B/S being less than 25 DEG C, and the phase-volume ratio of block S to block B/S being such that the hard phase portion in the total block copolymer is 1 to 40 vol % and the portion of the diene is less than 50 wt %; P2: 0 to 99.9 wt % of a thermoplastically formable and/or duroplastic polymer P2; P3: 0 to 70 wt % of further additives and forming auxiliary agents, the total of the weight percentages of constituents P1 to P3 being 100 %.

    Production of random and block copolymers suitable for making fibers, films and moldings
    37.
    发明专利
    Production of random and block copolymers suitable for making fibers, films and moldings 未知

    公开(公告)号：DE19801101A1

    公开(公告)日：1999-07-22

    申请号：DE19801101

    申请日：1998-01-15

    Applicant: BASF AG

    Inventor： HUNGENBERG KLAUS-DIETER DR ,  LOTH WOLFGANG DR ,  KNOLL KONRAD DR ,  JANKO LUTZ ,  BANDERMANN FRIEDHELM PROF DR

    IPC: C08F212/08 ,  C08F236/10 ,  C08F236/06

    Abstract: Production of random copolymers from monomers S and B by anionic polymerization comprises: (a) using a mixture containing monomers S and B in given initial concentrations; (b) bringing this mixture into contact with the polymerization initiator I or a growing polymer chain PBI or PSI; and (c) adding the remainder of monomer B at a rate determined by repeated solution of given differential equations. Production of random copolymers from monomers S and B by anionic polymerization with a polymerization initiator comprises: (a) using a mixture containing monomers S and B in initial concentrations (S)0 and (B)0 given by equation (1); (b) initiating copolymerization by bringing this mixture into contact with the polymerization initiator I or a growing polymer chain PBI or PSI; and (c) adding the remainder of monomer B at a rate rz for time t given by repeated solution of differential equations (2) to (6); -dB/dt = -rz .(B)z + (kSB/V) . PSI . B + (kBB/V) . PBI . B (2) -dS/dt = (kBS/V) . PBI . S + (kSS/V) . PSI . S (3) -dPBI/dt = (kBS/V) . PBI . S - (kSB/V) . PSI .B (4) -dPSI/dt = (kSB/V) . PSI . B - (kBS/V) . PBI .S (5) -dV/dt = -rz - (1/ rho s - 1/ rho p) Ms . dS/dt - (1/ rho B - 1/ rho p) MB . dB/dt (6) s = the required fraction of monomer B in the copolymer in mol.%; kBB = the reaction velocity constant for addition of monomer B to the growing polymer chain PBI with a monomer B as last added monomer; kSS = the reaction velocity constant for addition of monomer S to the growing polymer chain PSI with a monomer S as last added monomer; kSB = the reaction velocity constant for addition of monomer B to the growing polymer chain PSI with a monomer S as last added monomer; kBS = the reaction velocity constant for addition of monomer S to the growing polymer chain PBI with a monomer B as last added monomer; V = the volume of polymerization mixture at the particular moment; (B)z = the concentration of monomer B in the feed; rho S, rho B = the density of monomers S and B; rho P = the density of the copolymer; MS, MB = the molar weight of monomers S and B; S, B = the amounts of S and B under conditions (7); d(B)/dt = (b/s) . d(S)/dt (7) Independent claims are also included for (a) the production of block or 3-block copolymers with a random copolymer block S/B produced by this process; and (b) copolymers produced by this process.

    38.
    发明专利
    未知

    公开(公告)号：DE19716572A1

    公开(公告)日：1998-10-22

    申请号：DE19716572

    申请日：1997-04-19

    Applicant: BASF AG

    Inventor： GLUECK GUISCARD DR ,  HAHN KLAUS DR ,  HENN ROLF DR ,  WASMER KARL-HEINZ DR ,  GAUSEPOHL HERMANN DR ,  KNOLL KONRAD DR ,  BATSCHEIDER KARL-HEINZ

    IPC: C08J9/14 ,  C08F287/00 ,  C08J9/16 ,  C08L25/06 ,  C08L51/04 ,  C08L53/02

    Abstract: An expandable rubber modified styrene polymer (I) comprises (A) a continuous phase of polystyrene or a styrene comonomer containing up to 50 wt.% comonomer (B) 5-30 wt.% (w.r.t. polymer mixture) of dispersed rubber particles and (C) 2-15 pts.wt. (w.r.t. 100 pts wt. polymer mixture) of a low binding blowing agent. The rubber particles consists of a butadiene/styrene block copolymer having a compact lamella structure without polystyrene inclusions. Also claimed are: (i) a process for the production of (I) by dissolving (B) in (A) followed by polymerisation of the monomers and processing to a granular form whereby (C) is added during or after polymerisation. (ii) pre-foamed beads having pore walls made of (I).

    40.
    发明专利
    未知

    公开(公告)号：DE19704275A1

    公开(公告)日：1998-08-06

    申请号：DE19704275

    申请日：1997-02-05

    Applicant: BASF AG

    Inventor： NIESNER NORBERT DR ,  KNOLL KONRAD DR ,  SKUPIN GABRIEL ,  BEUMELBURG CHRISTOPH

    IPC: B32B27/08 ,  B65B25/00 ,  C08L53/00 ,  C08L53/02 ,  B29C47/12 ,  B65B25/06 ,  B65B31/00 ,  B65B41/00 ,  B65B61/02 ,  B65D65/40 ,  B65D81/18 ,  C08J5/18 ,  C08L25/10

    Abstract: The invention relates to a transparent, stretchable film, especially for modified atmosphere food packaging, comprising at least three levels A,B,C and possibly D, wherein A is composed of a polymer P1 or a mixture of P1 and P2 and P1 is a rubber elastic block copolymer of styrene and a special softening phase of styrene and butadiene; the second layer B is made of a polymer P2 exhibiting a water vapour permeability Pw of less than 8; the third layer C is made of a polymer with an oxygen permeability Po of less than 1000; and optionally a fourth layer D made of a polymer without any limitation of permeability. The invention also relates to the use of the above-mentioned film as food packaging and to a method of packing food in particular, especially one using said film in a standard packing machine.

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