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    CONTINUOUS MANUFACTURE OF POLYAMIDES
    12.
    发明专利
    CONTINUOUS MANUFACTURE OF POLYAMIDES 未知

    公开(公告)号：CA1050195A

    公开(公告)日：1979-03-06

    申请号：CA222674

    申请日：1975-03-20

    Applicant: BASF AG

    Inventor： MERTES FRIEDRICH ,  DOERFEL HELMUT ,  HEIL EDUARD ,  CORDES CLAUS

    IPC: C08G69/00 ,  C08G69/04 ,  C08G69/28 ,  C08G69/36 ,  G01N30/91

    Abstract: A process for the manufacture of a polyamide by continuously conveying the aqueous solution of a salt of essentially equivalent amounts of a diamine, or of a mixture of several diamines, and of a dicarboxylic acid, or of a mixture of several dicarboxylic acids, through several reaction zones under polyamide-forming conditions, wherein (a) in a first reaction zone the mixture of starting materials is heated to a temperature of at least 220.degree.C, but not higher than 300.degree.C, at a pressure which is above the corresponding saturation vapor pressure of water and prevents the formation of a vapor phase, until the polycondensation conversion is at least 80%, but without completing the condensation in this zone, (b) in a second zone the pressure acting on the polycondensation mixture is released, adiabatically, to levels of not less than 3 atmospheres, and not more then 20 atmospheres, so as to reach temperatures below 215.degree.C, (c) the polycondensation mixture is then heated in a third reaction zone comprising a heat exchanger consisting of heat exchange elements connected in parallel, to from 220 to 330.degree.C, in the course of less than 5 minutes, with evaporation of the bulk of the water, at the pressure level to which the pressure had previously been released or at a lower pressure, (d) in a fourth reaction zone the polycondensation mixture is separated from the water vapor, and (e) finally the condensation is completed under the conditions prevailing at the end of the third reaction zone to form a high molecular weight filamentforming polyamide.

    13.
    发明专利
    未知

    公开(公告)号：FI68645C

    公开(公告)日：1985-10-10

    申请号：FI772605

    申请日：1977-09-01

    Applicant: BASF AG

    Inventor： CORDES CLAUS ,  HORN PETER ,  WEISS HANS-PETER ,  GUTSCHE HERBERT

    IPC: C08J3/22 ,  C08K3/10 ,  C08K3/16 ,  C08L77/00

    Abstract: Thermoplastic nylons are stabilized with copper compounds and synergistic halides by incorporation of from 0.1 to 10% of a concentrate of nylon, copper bromide or iodide and calcium bromide, zinc bromide or magnesium bromide. The stabilized nylons may be thermoplastically processed to give semimanufactures or films.

    PAPER-COATING COMPOSITIONS
    14.
    发明专利
    PAPER-COATING COMPOSITIONS 未知

    公开(公告)号：CA1151787A

    公开(公告)日：1983-08-09

    申请号：CA345217

    申请日：1980-02-07

    Applicant: BASF AG

    Inventor： CORDES CLAUS ,  HIRSCH GUENTER ,  HARTMANN HEINRICH

    IPC: D21H19/36 ,  D21H19/50 ,  D21H19/52 ,  D21H19/54 ,  D21H19/58 ,  D21H19/60 ,  C09D3/727 ,  B32B27/10

    Abstract: An improved paper-coating composition containing, per 100 parts by weight of finely divided pigment, from 5 to 25 parts by weight of one or more copolymers, having a glass transition temperature of from -40 to 50.degree.C, in the form of an aqueous dispersion, and from 0.1 to 10 parts by weight of one or more water-soluble or water-swellable co-binders selected from the group comprising polyvinyl alcohol, cellulose ethers and esters, starch, casein, and alignates. The co-binder is added to the paper-coating composition in the form of a water-in-oil emulsion. paper-coating compositions having high water retention are obtained, and papers coated with such compositions have improved water resistance.

    20.
    发明专利
    未知

    公开(公告)号：FI68645B

    公开(公告)日：1985-06-28

    申请号：FI772605

    申请日：1977-09-01

    Applicant: BASF AG

    Inventor： CORDES CLAUS ,  HORN PETER ,  WEISS HANS-PETER ,  GUTSCHE HERBERT

    IPC: C08J3/22 ,  C08K3/10 ,  C08K3/16 ,  C08L77/00

    Abstract: Thermoplastic nylons are stabilized with copper compounds and synergistic halides by incorporation of from 0.1 to 10% of a concentrate of nylon, copper bromide or iodide and calcium bromide, zinc bromide or magnesium bromide. The stabilized nylons may be thermoplastically processed to give semimanufactures or films.

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