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    Heat-stabilising opt. reinforced polyamides - with solid solns. of cuprous iodide and alkali halide mixt. in polyamides
    25.
    发明专利
    Heat-stabilising opt. reinforced polyamides - with solid solns. of cuprous iodide and alkali halide mixt. in polyamides 未知

    公开(公告)号：DE2516565A1

    公开(公告)日：1976-10-28

    申请号：DE2516565

    申请日：1975-04-16

    Applicant: BASF AG

    Inventor： HORN PETER DIPL CHEM DR ,  DOERFEL HELMUT DIPL CHEM DR ,  ILLERS KARL HEINZ DIPL PHYS DR ,  CORDES CLAUS DIPL CHEM DR ,  WEISS HANS-PETER DIPL CHEM DR

    IPC: C08K3/16 ,  C08L77/00

    Abstract: Thermoplastic polyamides (I) having Fikentscher K-value 67-95 (measured 1% in 96% H2SO4), opt. contg. 80 pts. wt. reinforcing fillrs and opt. modified with 15 pts. wt. copolymers of ethylene/acrylic acid or ethylene/ME acrylate or PTFE, are stabilised by adding CuI and alkali halide as a solid, homogeneous soln. in a polyamide (II) having Fikentscher K-value 68-85 (1% in 96% H2SO4). Soln. is prepd. from 79-95 wt. % (II) and a mixt. of CuI and alkali iodide by melting (II) and mixing at 200-300 degrees C. Cu concn. of the solid, homogeneous soln. is 0.3-1.2 (0.5-0.9) wt. % w.r.t. total wt. of soln. Molar ratio CuI: alkali iodide is 1-11.5 (1-4.2) esp. 1-2.6. Pref. quantity of solid homogeneous soln. added to (I) is 0.3-7.1 (1.1-1.7) wt. %. Used esp. for Stabilising polyamide 6 and -6.6. mixt. yields stable polyamide mouldings and speck-free films stable to discolouration and heat. System resists storage and transport and can be added to polyamide (I) direction before injection moulding or foil-prodn.

    Thermoplastic polyesters of high viscosity - by melt polycondensn. in presence of small amt. of unsatd. diol or dicarboxylic acid
    26.
    发明专利
    Thermoplastic polyesters of high viscosity - by melt polycondensn. in presence of small amt. of unsatd. diol or dicarboxylic acid 未知

    公开(公告)号：DE2509790A1

    公开(公告)日：1976-09-16

    申请号：DE2509790

    申请日：1975-03-06

    Applicant: BASF AG

    Inventor： CORDES CLAUS DIPL CHEM DR ,  STERZEL HANS-JOSEF DIPL CHEM D

    IPC: C08G63/52 ,  C08L67/06 ,  C09D167/06 ,  C08G63/46

    Abstract: Thermoplastic polyesters having a melt viscosity at 250 degrees C >6000 beta and a relative viscosity >1.6 when measured at 25 degrees C in a 2:1 mixt. of phenol/o-chlorophenol are prepd. by melt polycondensn., at least partly at a temp. above 220 degrees C (pref. above 230 degrees C), of a mixt. of aliphatic and/or cycloaliphatic diols and dicarboxylic acids and/or esters contg. 0.1-10 mol. % of an aliphatic diol having at least one olefinic double bond and/or an aliphatic dicarboxylic acid or ester having at least one olefinic double bond immediately adjacent to the COOH or ester gps. Thermoplastic polyesters of relative viscosity as high as 1.6 were previously very difficult to prepare and required a 2nd condensn. stage which led to operating troubles and prods. of poor quality. The process of the invention enables such prods. to be prepd. very easily by a single stage melt condens.

    27.
    发明专利
    未知

    公开(公告)号：DE2501348A1

    公开(公告)日：1976-07-22

    申请号：DE2501348

    申请日：1975-01-15

    Applicant: BASF AG

    Inventor： CORDES CLAUS DIPL CHEM DR ,  ZAHRADNIK FRANZ DIPL CHEM DR

    IPC: C08G69/00 ,  C08G69/16 ,  C08G69/46

    Abstract: 1525992 Polymerising caprolactam BASF AG 14 Jan 1976 [15 Jan 1975] 01339/76 Heading C3R An extract from polymerised caprolactam, containing solvent, monomers and oligomers, is concentrated in the absence of atmospheric oxygen and in contact only with surfaces inert to the extract, and without further purification or separation is polymerized, e.g. by recycling or subsequently after being converted to flake.

    30.
    发明专利
    未知

    公开(公告)号：DE2417003A1

    公开(公告)日：1975-11-06

    申请号：DE2417003

    申请日：1974-04-08

    Applicant: BASF AG

    Inventor： MERTES FRIEDRICH DIPL CHEM DR ,  DOERFEL HELMUT DIPL CHEM DR ,  HEIL EDUARD ,  CORDES CLAUS DIPL CHEM DR

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

    Abstract: An improved process for the continuous manufacture of polyamides 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, or of mixtures of such salts with lactams and/or aminocarboxylic acids, through several reaction zones under polyamide-forming conditions, wherein the mixture of starting materials is heated, in a first reaction zone, to from 200 DEG to 300 DEG C, preferably from 220 DEG to 280 DEG C, at pressures which are above the corresponding saturation vapor pressure of water and prevent the formation of a vapor phase, the pressure action on the polycondensation mixture is released in a second reaction zone and condensation of the mixture, to form high molecular weight polyamides, is then completed in further reaction stages. According to the invention, A. THE MIXTURE OF STARTING MATERIALS IS HEATED, IN THE FIRST REACTION ZONE, UNTIL THE POLYCONDENSATION CONVERSION IS AT LEAST 80% AND PREFERABLY 90%, B. IN THE SECOND ZONE THE PRESSURE ACTING ON THE POLYCONDENSATION MIXTURE IS RELEASED, ADIABATICALLY, TO LEVELS OF NOT LESS THAN 3 ATMOSPHERES, PREFERABLY NOT LESS THAN 5 ATMOSPHERES, AND NOT MORE THAN 20 ATMOSPHERES, PREFERABLY NOT MORE THAN 15 ATMOSPHERES, SO AS TO REACH TEMPERATURES BELOW 215 DEG C, preferably 210 DEG 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 DEG to 330 DEG C, preferably from 250 DEG to 300 DEG C, in the course of less than 5 minutes and preferably less than 1 minute, the heating being carried out preferably in the presence of the water vapor formed during the adiabatic release of the pressure (in stage b), with application of heat and evaporation of the bulk of the water, at the pressure level to which the pressure has previously been released or at a lower pressure, and D. IN FURTHER REACTION STAGES, THE CONDENSATION IS COMPLETED, UNDER THE CONDITIONS PREVAILING AT THE END OF THE THIRD REACTION ZONE AND, FINALLY, BY CONVENTIONAL METHODS, TO FORM HIGH MOLECULAR WEIGHT POLYAMIDES.

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