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    Poly-epsilon - caprolactam foil mfr. - by extruding melt contg. crystalline magnesium silicate and drawing off cooling roller at given rate
    3.
    发明专利
    Poly-epsilon - caprolactam foil mfr. - by extruding melt contg. crystalline magnesium silicate and drawing off cooling roller at given rate 未知

    公开(公告)号：DE2450776A1

    公开(公告)日：1976-05-06

    申请号：DE2450776

    申请日：1974-10-25

    Applicant: BASF AG

    Inventor： ZAHN ERWIN DIPL CHEM DR ,  CORDES CLAUS DIPL CHEM DR ,  ZAHRADNIK FRANZ DIPL CHEM DR ,  WEISS HANS-PETER DIPL CHEM DR

    IPC: B29C47/88 ,  C08L77/00 ,  B29D7/10

    Abstract: Process for producing plain foils from poly-epsilon-caprolactam or from its copolymers contg. >70% caprolactam, by extruding the melt over a fishtail die onto a cooling roller and drawing off the faoil formed, takes place by (i) using a polycaprolactam having relative viscosity 2.4-3.3 (2.5-2.8) and which contains 0.0005-0.5(0.001-0.01)% crystalline Mg silicates of particles size 30 mu, evenly and finely distributed, and (2) drawing off the melt leaving fishtail die at a drawing-off rate >30 (esp. >50)m/min. from cooling roller to a foil having thickness 50 mu. The foils can be used e.g., as packaging matl. Foils (i) have outstanding props. in use and processing, e.g., behaviour in machines for further processing; high speed of drawing off allows quick processing rates, and foils are easily lined, laminated and printed; (ii) are highly transparent and bright; (iii) process can be carried out at lower melting temps. than with standard high mol. wt. polyamides, thus reducing formation of decompsn. prodts. and cleaning intervals of machine parts.

    4.
    发明专利
    未知

    公开(公告)号：DE2840502A1

    公开(公告)日：1980-03-27

    申请号：DE2840502

    申请日：1978-09-18

    Applicant: BASF AG

    Inventor： DENZINGER WALTER ,  CORDES CLAUS DIPL CHEM DR

    IPC: C08F220/00 ,  C08F210/14 ,  C08F220/04 ,  C08F222/06

    Abstract: Terpolymers which have Fikentscher K-values of from 8 to 100 and comprise 50 mole percent of maleic anhydride units, from 35 to 45 mole percent of 2,4,4'-trimethylpent-1-ene units and from 5 to 15 mole percent of 2,4,4'-trimethylpent-2-ene units, and processes for their preparation by polymerizing 50 parts by weight of maleic anhydride, from 35 to 180 parts by weight of 2,4,4'-trimethylpent-1-ene and from 0.6 to 6 parts by weight of 2,4,4'-trimethylpent-2-ene per part by weight of 2,4,4'-trimethylpent-1-ene employed, in the presence of a free-radical initiator at from 60 DEG to 200 DEG C. and a pressure of from 1 to 20 bar, and separating the terpolymers from the unconverted monomers.

    7.
    发明专利
    未知

    公开(公告)号：DE2522901A1

    公开(公告)日：1976-12-09

    申请号：DE2522901

    申请日：1975-05-23

    Applicant: BASF AG

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

    IPC: C08L67/00 ,  C08K5/29 ,  C08L67/02

    Abstract: Stabilized polyester molding compositions in which the stabilizer is a carbodiimide of the formula where R is hydrogen, alkyl, halogen or nitro, at least one of the substituents R in the ortho-position to the carbodiimide group must differ from hydrogen, and the carbodiimide molecule contains, as substituents R, 2 alkyl groups and 2 nitro groups, or from 4 to 6 chlorine atoms, or 2 alkyl groups and from 4 to 6 chlorine atoms, or 2 chlorine atoms and 2 nitro groups, or 4 chlorine atoms and 2 bromine atoms.

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