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    Continuous preparation process of low-molecular polyamides
    72.
    发明专利
    Continuous preparation process of low-molecular polyamides 未知

    公开(公告)号：CZ287624B6

    公开(公告)日：2001-01-17

    申请号：CZ342995

    申请日：1994-06-20

    Applicant: BASF AG

    Inventor： PIPPER GUNTER ,  KLEINKE ANDREAS ,  HILDENBRAND PETER

    IPC: C08G69/14 ,  B01J19/28 ,  C08G69/04 ,  C08G69/16 ,  C08G69/46

    Abstract: In the present invention there is disclosed a continuous preparation process of low-molecular polyamides from a mixture of at least one lactam and water and optionally other monomeric units and/or usual admixtures and filling agents employed in conditions of polyamide preparation, whereby the mixture of starting compounds is heated in liquid phase in reaction zone in the presence of 0.5 to 7 percent by weight water at a temperature ranging from 220 to 310 degC and polymerization is carried out until reaction of at least 85 percent is completed and in a second reaction zone polymerization is continued after release of pressure at a temperature ranging from 215 to 300 degC without further supply of heat.

    76.
    发明专利
    未知

    公开(公告)号：AT194153T

    公开(公告)日：2000-07-15

    申请号：AT97943850

    申请日：1997-09-19

    Applicant: BASF AG

    Inventor： KOWITZ CHRISTOPH ,  BAUER PETER ,  BEIMBORN DIETER BERNHARD ,  BRUCHMANN BERND ,  FALLER UWE ,  LAUN MARTIN ,  PAGGA UDO ,  PIPPER GUNTER ,  WARZELHAN VOLKER

    IPC: C08J5/00 ,  C08G18/42 ,  C08G18/76 ,  C08G18/79 ,  C08G63/20 ,  C09D5/00 ,  C09D167/00 ,  C09D175/04 ,  D01F6/84 ,  D01F6/92

    Abstract: PCT No. PCT/EP97/04908 Sec. 371 Date Mar. 17, 1999 Sec. 102(e) Date Mar. 17, 1999 PCT Filed Sep. 19, 1997 PCT Pub. No. WO98/12242 PCT Pub. Date Mar. 20, 1998Biodegradable polyesters based on A) 95-99.99 mol % of at least one polyester A containing as monomeric building blocks of an acid component comprising a11) 20-95 mol % of at least one aliphatic or cycloaliphatic dicarboxylic acid or its ester-forming derivative and a12) 5-80 mol % of at least one aromatic dicarboxylic acid or its ester-forming derivative and at least one dihydroxy compound or at least one amino alcohol or their mixtures, and B) 0.01-5 mol % of a mixture comprising mono-, bi-, tri-, tetra- and higher-nuclear isocyanurates or corresponding compounds containing two, three or four functional groups capable of reacting with the end groups of polyester A, or mixtures of the isocyanurates and the corresponding compounds, as well as molding compositions comprising said polyesters, their manufacture and their use in the manufacture of moldings, filsm, fibers and coatings.

    77.
    发明专利
    未知

    公开(公告)号：ID24217A

    公开(公告)日：2000-07-13

    申请号：ID20000978

    申请日：1998-11-24

    Applicant: BASF AG

    Inventor： HILDENBRAND PETER ,  LANG REINHARD ,  LUDWIG ALFONS ,  PIPPER GUNTER

    IPC: B29B9/16 ,  C08G69/16 ,  C08J3/12 ,  C08G69/46

    Abstract: A process for continuous extraction of polyamide particles in an essentially vertical extraction column using an aqueous extractant comprises using an extraction column that is divided into two zones and performing an extraction with a recirculating 15-40% strength by weight aqueous epsi-caprolactam solution in the first zone and then with countercurrent water at a from 5 to 40° C. lower temperature in the second zone. The process provides for economical extraction of polyamides with a low level of monomers and oligomers.

    METHOD OF CONTINUOUSLY OBTAINING LOW-MOLECULE POLYAMIDES
    79.
    发明专利
    METHOD OF CONTINUOUSLY OBTAINING LOW-MOLECULE POLYAMIDES 未知

    公开(公告)号：PL177545B1

    公开(公告)日：1999-12-31

    申请号：PL31229794

    申请日：1994-06-20

    Applicant: BASF AG

    Inventor： PIPPER GUNTER ,  KLEINKE ANDREAS ,  HILDENBRAND PETER

    IPC: C08G69/14 ,  B01J19/28 ,  C08G69/04 ,  C08G69/16 ,  C08G69/46

    Abstract: PCT No. PCT/EP94/01998 Sec. 371 Date Dec. 28, 1995 Sec. 102(e) Date Dec. 28, 1995 PCT Filed Jun. 20, 1994 PCT Pub. No. WO95/01389 PCT Pub. Date Jan. 12, 1995A process for the continuous production of polyamides from a mixture of at least one lactam and water and, if required, other monomer units and/or conventional additives and fillers under polyamide-forming conditions, where the mixture of the starting materials is heated in liquid phase in a first reaction zone until a conversion of at least 70% is reached, and undergoes adiabatic decompression and further polymerization in another reaction zone, wherein, in the first reaction zone, 0.5-7% by weight of water are employed, the temperature is increased to the range from 220 DEG to 310 DEG C., and polymerization is carried out until a conversion of at least 85% is reached and, in the second reaction zone, after the decompression further polymerization is carried out in the range from 215 DEG to 300 DEG C. without heat input.

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