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    103.
    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.

    CONTINUOUS POLYAMIDE EXTRACTION PROCESS
    106.
    发明专利
    CONTINUOUS POLYAMIDE EXTRACTION PROCESS 未知

    公开(公告)号：MY129533A

    公开(公告)日：2007-04-30

    申请号：MYPI9805229

    申请日：1998-11-18

    Applicant: BASF AG

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

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

    Abstract: A PROCESS FOR CONTINUOUS EXTRACTION OF POLYAMIDE PARTICLES IN AN ESSENTIALLY VERTICAL EXTRACTION COLUMN (1) USING AN AQUEOUS EXTRACTANT COMPRISES USING AN EXTRACTION COLUMN (1) THAT IS DIVIDED INTO TWO ZONES (2,3) AND PERFORMING AN EXTRACTION WITH A RECIRCULATING 15-40% STRENGTH BY WEIGHT AQUEOUS &egr;-CAPROLACTAM SOLUTION IN THE FIRST ZONE (2) AND THEN WITH COUNTERCURRENT WATER AT A FROM 5 TO 40°C. LOWER TEMPERATURE IN THE SECOND ZONE (3). THE PROCESS PROVIDES FOR ECONOMICAL EXTRACTION OF POLYAMID S WITH A LOW LEVEL OF MONOMERS AND OLIGOMERS. (SOLE

    CONTINUOUS POLYAMIDE EXTRACTION PROCESS
    108.
    发明专利
    CONTINUOUS POLYAMIDE EXTRACTION PROCESS 未知

    公开(公告)号：BG64318B1

    公开(公告)日：2004-09-30

    申请号：BG10445900

    申请日：2000-05-18

    Applicant: BASF AG

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

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

    Abstract: A process is disclosed for continuously extracting polyamide articles from a circulating extraction solution in a vertical reaction column subdivided into two zones. In the first zone the polyamide is treated with an aqueous epsilon-caprolactam solution with 15 to 40 wt. % epsilon-caprolactam as extraction agent at 100 to 140 degrees C and water is then used in the second zone as extraction agent at a temperature 5 to 40 degrees C lower. The process allows polyamides with a low monomer and oligomer content to be economically extracted. 10 claims, 1 figure

    BIODEGRADABLE POLYESTERS
    109.
    发明专利
    BIODEGRADABLE POLYESTERS 未知

    公开(公告)号：HU223575B1

    公开(公告)日：2004-09-28

    申请号：HU9903890

    申请日：1997-09-19

    Applicant: BASF AG

    Inventor： BAUER PETER ,  BEIMBORN DIETER BERNHARD ,  BRUCHMANN BERND ,  FALLER UWE ,  KOWITZ CHRISTOPH ,  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.

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