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    PROCESS FOR THE CONTINUOUS PRODUCTION OF POLYAMIDES
    1.
    发明专利
    PROCESS FOR THE CONTINUOUS PRODUCTION OF POLYAMIDES 未知

    公开(公告)号：DE3468886D1

    公开(公告)日：1988-02-25

    申请号：DE3468886

    申请日：1984-06-13

    Applicant: BASF AG

    Inventor： PIPPER GUNTER ,  SCHMIDT FRANZ DR ,  THEYSOHN RAINER DR ,  RIEGGER SIEGFRIED DR ,  HEIL EDUARD ,  FISCHER HERMANN DR ,  THOMA RICHARD DR ,  MATTHIES PAUL DR

    IPC: C08G69/00 ,  C08G69/26 ,  C08G69/28 ,  C08L77/00

    Abstract: Nylons are prepared by a continuous process in which, in a precondensation zone, an aqueous solution of a salt of a dicarboxylic acid of 6 to 18 carbon atoms and a diamine of 6 to 18 carbon atoms is heated to 250 DEG -300 DEG C. under superatmospheric pressure, with simultaneous vaporization of water and formation of a prepolymer, the prepolymer and the vapor are separated, and the former is fed into a polycondensation zone and condensed under superatmospheric pressure of from 1 to 10 bar and at from 250 DEG to 300 DEG C., wherein the aqueous salt solution is condensed under superatomspheric pressure of from 1 to 10 bar in the first third of the tubular precondensation zone provided with baffles, until the degree of conversion is not less than 93%, and the prepolymer and the vapor phase are brought into intimate contact with one another in the remaining two thirds of the precondensation zone.

    4.
    发明专利
    未知

    公开(公告)号：DE3321579A1

    公开(公告)日：1984-12-20

    申请号：DE3321579

    申请日：1983-06-15

    Applicant: BASF AG

    Inventor： PIPPER GUNTER ,  SCHMIDT FRANZ DR ,  THEYSOHN RAINER DR ,  RIEGGER SIEGFRIED DR ,  HEIL EDUARD ,  FISCHER HERMANN DR ,  THOMA RICHARD DR ,  MATTHIES PAUL DR

    IPC: C08G69/00 ,  C08G69/26 ,  C08G69/28 ,  C08L77/00

    Abstract: Nylons are prepared by a continuous process in which, in a precondensation zone, an aqueous solution of a salt of a dicarboxylic acid of 6 to 18 carbon atoms and a diamine of 6 to 18 carbon atoms is heated to 250 DEG -300 DEG C. under superatmospheric pressure, with simultaneous vaporization of water and formation of a prepolymer, the prepolymer and the vapor are separated, and the former is fed into a polycondensation zone and condensed under superatmospheric pressure of from 1 to 10 bar and at from 250 DEG to 300 DEG C., wherein the aqueous salt solution is condensed under superatomspheric pressure of from 1 to 10 bar in the first third of the tubular precondensation zone provided with baffles, until the degree of conversion is not less than 93%, and the prepolymer and the vapor phase are brought into intimate contact with one another in the remaining two thirds of the precondensation zone.

    PROCESS FOR THE PREPARATION OF LINEAR HIGH-MOLECULAR SATURATED POLYESTERS
    5.
    发明专利
    PROCESS FOR THE PREPARATION OF LINEAR HIGH-MOLECULAR SATURATED POLYESTERS 未知

    公开(公告)号：DE2960225D1

    公开(公告)日：1981-04-23

    申请号：DE2960225

    申请日：1979-03-15

    Applicant: BASF AG

    Inventor： STERZEL HANS-JOSEF DR ,  SCHMIDT FRANZ DR ,  PIRZER HANS DR

    IPC: C08G63/00 ,  C08G63/16 ,  C08G63/18 ,  C08G63/78 ,  C08G63/22

    Abstract: A process for the preparation of high molecular weight linear saturated polyesters derived from dicarboxylic acids or their ester-forming derivatives and aliphatic and/or cycloaliphatic diols, comprising the condensation of polyester precondensates having a relative viscosity of from 1.05 to 1.15 at from 220 DEG to 280 DEG C. under reduced pressure, wherein (a) the condensation is first started with from 70 to 95 percent by weight of the polyester precondensate and (b) after from 10 to 50% of the total condensation time the remaining 5 to 30 percent by weight of the polyester precondensate are added to the polyester melt undergoing condensation in accordance with (a), and the condensation is taken to completion.

    8.
    发明专利
    未知

    公开(公告)号：DE3917456A1

    公开(公告)日：1990-12-06

    申请号：DE3917456

    申请日：1989-05-30

    Applicant: BASF AG

    Inventor： SCHMIDT FRANZ DR ,  BUNG RICHARD DR ,  LAUN MARTIN DR ,  LOUIS GERD DR

    IPC: C08F2/22 ,  C08F2/20 ,  C08F20/22 ,  C08F218/16 ,  C08F220/04 ,  C08F220/40 ,  C08F246/00

    Abstract: Highly dilatant copolymer dispersions which contain, as essential components, an emulsion copolymer prepared from 1 to 10% by weight, based on the total amount of monomers employed, of alpha , beta - monoolefinically unsaturated carboxylic acids and other olefinically unsaturated monomers are characterised in that the emulsion copolymer is prepared in the presence of from 5 to 30% by weight, based on the total amount of monomers employed, of an allyl or alkylallyl carboxylate containing 2 or more copolymerisable, olefinic double bonds, or a mixture thereof, where the alkyl radical contains 1 to 4 carbon atoms.

    PROCESS FOR THE CONTINUOUS PRODUCTION OF POLYAMIDES
    9.
    发明专利
    PROCESS FOR THE CONTINUOUS PRODUCTION OF POLYAMIDES 未知

    公开(公告)号：DE3468224D1

    公开(公告)日：1988-02-04

    申请号：DE3468224

    申请日：1984-06-13

    Applicant: BASF AG

    Inventor： SCHMIDT FRANZ DR ,  PIPPER GUNTER ,  FLOSS JOSEF GEORG DR ,  ZAHRADNIK FRANZ DR

    IPC: C08G69/26 ,  C08G69/00 ,  C08G69/28 ,  C08L77/00

    Abstract: Nylons are prepared by a continuous process in which, in an evaporator zone, an aqueous solution of a salt of a dicarboxylic acid of 6 to 18 carbon atoms and a diamine of 6 to 18 carbon atoms is heated to 250 DEG -300 DEG C. under superatmospheric pressure, with simultaneous vaporization of water and formation of a prepolymer, the prepolymer and the vapors are separated continuously, the vapors are rectified and the entrained diamines are recycled, and the prepolymer is fed to a polycondensation zone and subjected to polycondensation under superatmospheric pressure of from 1 to 10 bar and at from 250 DEG to 300 DEG C., wherein the aqueous salt solution is heated under superatmospheric pressure of from 1 to 10 bar during a residence time of less than 60 seconds, with the proviso that, on leaving the evaporator zone, the degree of conversion is not less than 93% and the water content of the prepolymer is not more than 7% by weight.

    10.
    发明专利
    未知

    公开(公告)号：DE3321581A1

    公开(公告)日：1984-12-20

    申请号：DE3321581

    申请日：1983-06-15

    Applicant: BASF AG

    Inventor： SCHMIDT FRANZ DR ,  PIPPER GUNTER ,  FLOSS JOSEF GEORG DR ,  ZAHRADNIK FRANZ DR

    IPC: C08G69/26 ,  C08G69/00 ,  C08G69/28 ,  C08L77/00

    Abstract: Nylons are prepared by a continuous process in which, in an evaporator zone, an aqueous solution of a salt of a dicarboxylic acid of 6 to 18 carbon atoms and a diamine of 6 to 18 carbon atoms is heated to 250 DEG -300 DEG C. under superatmospheric pressure, with simultaneous vaporization of water and formation of a prepolymer, the prepolymer and the vapors are separated continuously, the vapors are rectified and the entrained diamines are recycled, and the prepolymer is fed to a polycondensation zone and subjected to polycondensation under superatmospheric pressure of from 1 to 10 bar and at from 250 DEG to 300 DEG C., wherein the aqueous salt solution is heated under superatmospheric pressure of from 1 to 10 bar during a residence time of less than 60 seconds, with the proviso that, on leaving the evaporator zone, the degree of conversion is not less than 93% and the water content of the prepolymer is not more than 7% by weight.

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