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264 records (took 0.021 seconds)

    162.
    发明专利
    未知

    公开(公告)号：DE50002618D1

    公开(公告)日：2003-07-24

    申请号：DE50002618

    申请日：2000-11-15

    Applicant: BASF AG

    Inventor： DEININGER JUERGEN ,  GOETZ WALTER ,  LUDWIG ALFONS ,  PIPPER GUNTER

    IPC: C08J5/18 ,  C08G69/00 ,  C08G69/02 ,  C08G69/04 ,  C08G69/14 ,  C08G69/26 ,  C08G69/28 ,  C08G69/36 ,  C08G69/48 ,  D01F6/80

    Abstract: A process for continuous production of copolyamides based on a lactam (I), a diamine (II) and a dicarboxylic acid (III) comprisesreacting a mixture (IV) comprising a diamine (II), a dicarboxylic acid (III) and water in a first reaction zone at a pressure in the range from 1.3*10 to 2.5*10 Pa in the entry zone of the reaction zone and at a temperature above the melting point of polymer (V) to a conversion, based on the molar amounts of diamine (II) and dicarboxylic acid (III), of at least 80% to form a polymer (V),reacting a mixture (VI) comprising lactam (I) and water in a second reaction zone at a pressure in the range from 5*10 to 40*10 Pa and at a temperature above the melting point of polymer (VII) to a conversion, based on the molar amount of lactam (I), of at least 80% to form a polymer (VII),then reacting polymer (V) and polymer (VII) with each other in a third reaction zone at a pressure in the range from 1*10 to 1.5*10 Pa in the entry zone of the reaction zone at temperatures above the melting point of polymer (VIII) to form a polymer (VIII), said polymer (VIII) having a 95° C. water extractables content, based on lactam (I), diamine (II) and dicarboxylic acid (III), of not more than 10% by weight, andthen extracting the polymer (VIII) with water to obtain the copolyamide.

    163.
    发明专利
    未知

    公开(公告)号：DE59805550D1

    公开(公告)日：2002-10-17

    申请号：DE59805550

    申请日：1998-11-24

    Applicant: BASF AG

    Inventor： ERBES JOERG ,  LUDWIG ALFONS ,  PIPPER GUNTER

    IPC: C08J3/12 ,  B01D11/02 ,  B29B9/16 ,  C08G69/00 ,  C08G69/04 ,  C08G69/16 ,  C08G69/46

    Abstract: A process for continuous extraction of polyamide particles using a recirculating extractant in a vertical extraction column that is divided into two zones comprises treating the polyamide with an aqueous extractant comprising from 40 to 95% by weight of epsi-caprolactam in a first zone at from 100 to 140° C., and then effecting an aftertreatment with water in a second zone. The caprolactam can then be extracted in a conventional manner. The process provides for economical production of polyamide having a low dimer content.

    METHOD FOR THE CONTINUOUS PRODUCTION OF COPOLYAMIDES BASED ON A LACTAME (I), A DIAMINE (II) AND A DICARBOXYLIC ACID (III)
    165.
    发明专利
    METHOD FOR THE CONTINUOUS PRODUCTION OF COPOLYAMIDES BASED ON A LACTAME (I), A DIAMINE (II) AND A DICARBOXYLIC ACID (III) 未知

    公开(公告)号：CA2392736A1

    公开(公告)日：2001-06-07

    申请号：CA2392736

    申请日：2000-11-15

    Applicant: BASF AG

    Inventor： LUDWIG ALFONS ,  GOTZ WALTER ,  DEININGER JURGEN ,  PIPPER GUNTER

    IPC: C08J5/18 ,  C08G69/00 ,  C08G69/02 ,  C08G69/04 ,  C08G69/14 ,  C08G69/26 ,  C08G69/28 ,  C08G69/36 ,  C08G69/48 ,  D01F6/80

    Abstract: The invention relates to a method for the continuous production of copolyamides which are based on a lactame (I), a diamine (II) and a dicarboxylic acid (III). The inventive method is characterised in that a mixture (IV) containing a diamine (II), a dicarboxylic acid (III) and water is converted to a polymer in a first reaction area at a pressure of 1,3*105 to 2,5*105 Pa in the entry part of the reaction area, at a temperature above th e melting point of the polymer (V) and with a degree of conversion of at least 80 % in relation to the molar quantities of diamine (II) and dicarboxylic ac id (III), in that a mixture (VI) containing lactame (I) and water is converted to a polymer (VII) in a second reaction area at a pressure of 5*105 to 40*105 P a, at a temperature above the melting point of the polymer (VII) and with a degree of conversion of at least 80 % in relation to the molar quantity of lactame (I), in that polymer (V) and polymer (VII) are then reacted with eac h other in a third reaction area at a pressure of 1*105 to 1,5*105 Pa in the entry part of the reaction area, at temperatures above the melting temperatu re of the polymer (VIII), to produce the polymer (VIII). Polymer (VIII) contain s a maximum of 10 wt. % constituents that are extractable with water at a temperature of 95 ~C, inrelation to lactame (I), diamine (II) and dicarboxylic acid (III). The polymer (VIII) is then extracted with water so as to obtain the copolyamide. The invention also relates to copolyamides obtain ed using this method and to their use in the production of fibres, sheet structures and moulded bodies which are based on these copolyamides.

    METHOD OF CONTINUOUSLY EXTRACTING POLYAMIDE
    166.
    发明专利
    METHOD OF CONTINUOUSLY EXTRACTING POLYAMIDE 未知

    公开(公告)号：PL341572A1

    公开(公告)日：2001-04-23

    申请号：PL34157298

    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.

    170.
    发明专利
    未知

    公开(公告)号：BR9815036A

    公开(公告)日：2000-10-03

    申请号：BR9815036

    申请日：1998-11-24

    Applicant: BASF AG

    Inventor： ERBES JORG ,  LUDWIG ALFONS ,  PIPPER GUNTER

    IPC: C08J3/12 ,  B01D11/02 ,  B29B9/16 ,  C08G69/00 ,  C08G69/04 ,  C08G69/16 ,  C08G69/46

    Abstract: A process for continuous extraction of polyamide particles using a recirculating extractant in a vertical extraction column that is divided into two zones comprises treating the polyamide with an aqueous extractant comprising from 40 to 95% by weight of epsi-caprolactam in a first zone at from 100 to 140° C., and then effecting an aftertreatment with water in a second zone. The caprolactam can then be extracted in a conventional manner. The process provides for economical production of polyamide having a low dimer content.

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