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    CONTINUOUS MANUFACTURE OF POLYAMIDES
    42.
    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.

    Production of Elastomers Containing Urethane Groups.
    43.
    发明专利
    Production of Elastomers Containing Urethane Groups. 未知

    公开(公告)号：GB1158270A

    公开(公告)日：1969-07-16

    申请号：GB5407866

    申请日：1966-12-02

    Applicant: BASF AG

    Inventor： KUNDE JOACHIM ,  WILHELM HANS ,  DOERFEL HELMUT ,  RAUCH KONRAD

    IPC: C08G18/10 ,  C08G18/42

    Abstract: 1,158,270. Polyesterurethanes. BADISCHE ANILIN- & SODA-FABRIK A.G. 2 Dec., 1966 [4 Dec., 1965], No. 54078/66. Heading C3R. Polyesterurethanes are prepared by reacting an hydroxyl group containing polyester of M.W. 500 to 5,000 which has been prepared by reacting adipic acid with a mixture of 45 to 90% by weight of 1,6-hexanediol and 10 to 55% by weight of 2,2,4-trimethylpentanediol -1,3, first with a stoichiometric excess of an organic polyisocyanate followed by reaction with a chain extender which is preferably a diamine, hydrazine, a hydrazide or a glycol. If desired the reactions are carried out in the presence of an inert polar solvent such as dimethylformamide, dimethylacetamide, tetramethylurea or dimethyl sulphoxide. Up to 50% by weight of 2,2,4-trimethylpentanediol-1,3 may be replaced by 2,2-dimethylhexanediol-1,3. Suitable polyisocyanates are 4,4 1 -diphenylmethane diisocyanate; 2,4-toluylene diisocyanate; p-phenylene diisocyanate; 1,5-naphthylene diisocyanate; 1,6-hexane diisocyanate and 4,4 1 -diphenyl (thio) ether diisocyanates. The chain extenders may be ethylene diamine; propylene diamine; n-xylylene diamine; hydrazine; carbodihydrazide; adipodihydrazide; ethylene glycol and 1,4-butane diol. The resulting polymers may be used in the production of fibres or films. The preparation of polyesters from adipic acid and a diol mixture of 45 to 90% by weight of hexanediol-1,6 and 10 to 55% by weight of 2,2,4-trimethylpentanediol- 1,3 is described in the examples. In Example 1, the ratio of hexanediol-1,6 to 2,2,4-trimethylpentanediol-1,3 is 76À4: 23À6 and in Example 2 86À6: 13À4.

    46.
    发明专利
    未知

    公开(公告)号：FR1460479A

    公开(公告)日：1966-11-25

    申请号：FR43066

    申请日：1965-12-21

    Applicant: BASF AG

    Inventor： KUNDE JOACHIM ,  WILHELM HANS ,  DOERFEL HELMUT

    IPC: C08G18/10 ,  C08G18/42

    Abstract: Mouldings are prepared from elastomers containing urethane groups and/or urea and/or semicarbazide groups. The elastomers are prepared by reacting a polyester having at least two hydroxyl groups prepared from adipic acid and a mixture of 45-90% by wt. 1,6-hexanediol and 10-55% by wt. 2,2-dimethyl, 1,3-hexanediol, first with a polyisocyanate and then with a chain extender. The process may be carried out in the presence of an unreactive polar solvent. Up to 10% by wt. of the adipic acid may be replaced by other dicarboxylic acids, e.g. sebacic, pimelic, suberic or isophthalic acids.

    Purified laurolactam
    47.
    发明专利
    Purified laurolactam 未知

    公开(公告)号：GB1048233A

    公开(公告)日：1966-11-16

    申请号：GB774064

    申请日：1964-02-25

    Applicant: BASF AG

    Inventor： RAFF PAUL ,  DOERFEL HELMUT

    IPC: C07D201/16 ,  C08G69/14

    Abstract: Laurolactam, the lactam of o -amino-lauric acid, is recovered from solutions of laurolactam in mineral acids, from suspensions of laurolatam in acid, neutral or alkaline aqueous solutions, or from solutions of salts which also contain laurolactam in solution or suspension, by mixing the lactam-containing mixture with an organic solvent or solvent mixture as defined below, adding water if desired, separating the two layers which form, treating the solution of laurolactam in the organic solvent optionally with aqueous alkalis and then with water removing the extraction agent from the laurolactam by distillation, and then immediately distilling the lactam melt thus obtained under subatmospheric pressure to purify it. The organic solvent or solvent mixture is not miscible with water, boils at a temperature between 100 DEG C. and 150 DEG C. at atmospheric pressure, and forms stable homogeneous liquid binary mixtures with laurolactam in the temperature range above the boiling point of the solvent or solvent mixture up to the melting point of laurolactam. Specified solvents are alkyl-substituted benzenes containing 7 or 8 carbon atoms, cycloalkanes or alkyl-substituted cycloalkanes containing 8 carbon atoms and 6- to 8-membered rings, and chlorinated hydrocarbons. Preferably, the extraction agent is removed from the laurolactam by a two-stage distillation, a liquid binary mixture containing preferably more than 50% by weight of laurolactam being obtained in the first stage, this mixture is, if desired, kept under protective conditions at a temperature in the range between 84 DEG C. and 154 DEG C., and the mixture is separated completely into laurolactam melt and extraction agent at a temperature above the melting point of laurolactam in the second distillation stage. When the initial material has been obtained via a Beckmann rearrangement it is preferred to add a neutralizing agent at the same time as the extraction agent. Examples are given.

    50.
    发明专利
    未知

    公开(公告)号：FR1377384A

    公开(公告)日：1964-11-06

    申请号：FR946178

    申请日：1963-08-30

    Applicant: BASF AG

    Inventor： DOERFEL HELMUT ,  RAFF PAUL

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