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    2.
    发明专利
    未知

    公开(公告)号：AT377611T

    公开(公告)日：2007-11-15

    申请号：AT05750544

    申请日：2005-05-17

    Applicant: BASF AG

    Inventor： SCHWITTAY CLAUDIUS ,  STOECKELMANN ELMAR ,  HEINEMANN JOHANNES ,  ZOELLNER KNUT ,  STAMMER ACHIM

    IPC: C08G2/10 ,  C08G2/08 ,  C08J11/02 ,  C08L59/00

    Abstract: A process for removing residual monomers from polyoxymethylene homo- or copolymers, comprising the following process steps: a) the residual monomers are removed in gaseous form as vapors from the polymer in a devolatilization apparatus, b) the residual monomer vapors are removed through a vapor pipe, c) the residual monomers are condensed from the vapors in a condensation apparatus at from 1.09 to 102.4 bar and from 102 to 230° C., the temperature not falling below 102° C. at any point of the condensation apparatus, and those surfaces of the condensation apparatus which come into contact with the vapors being coated with a liquid film of condensed residual monomers.

    METHOD FOR PRODUCTION OF POLYOXYMETHYLENE HOMO- OR CO-POLYMERS
    3.
    发明专利
    METHOD FOR PRODUCTION OF POLYOXYMETHYLENE HOMO- OR CO-POLYMERS 未知

    公开(公告)号：CA2620161A1

    公开(公告)日：2007-03-01

    申请号：CA2620161

    申请日：2006-08-25

    Applicant: BASF AG

    Inventor： STAMMER ACHIM ,  STOECKELMANN ELMAR ,  LANG NEVEN ,  ZOELLNER KNUT

    IPC: C08G2/10 ,  C07D323/06 ,  C08G2/28

    Abstract: A method for production of polyoxymethylene homo- or co-polymers by homo- or co-polymerisation of trioxan or additional suitable co-monomers is disclosed , wherein trioxan is firstly produced in a monomer plant, which contains residual monomer and which is degassed in one or more stages to give one or more vapour streams (13, 14), optionally fed to a condenser (K) wherein the condensable components are condensed out to give a condensate (15), recycled into the polymerisation reactor (P) and a gaseous stream (16) containing formaldehyde and a partly degassed polyoxymethylene homo- or co-polymer (17) , supplied to an extruder (E) or mixer and mixed with normal additives and processing agents to give a polymer melt (19) with removal of a formaldehyde - containing extruder or mixer exhaust gas (18) from the extruder (E) or mixer , characterised in that the formaldehyde-containing by product streams (14, 16 , 18) are directly recycled to the monomer plant from the polymer plant withou t addition of adjuncts.

    5.
    发明专利
    未知

    公开(公告)号：DE502005001905D1

    公开(公告)日：2007-12-20

    申请号：DE502005001905

    申请日：2005-05-17

    Applicant: BASF AG

    Inventor： SCHWITTAY CLAUDIUS ,  STOECKELMANN ELMAR ,  HEINEMANN JOHANNES ,  ZOELLNER KNUT ,  STAMMER ACHIM

    IPC: C08G2/10 ,  C08G2/08 ,  C08J11/02 ,  C08L59/00

    Abstract: A process for removing residual monomers from polyoxymethylene homo- or copolymers, comprising the following process steps: a) the residual monomers are removed in gaseous form as vapors from the polymer in a devolatilization apparatus, b) the residual monomer vapors are removed through a vapor pipe, c) the residual monomers are condensed from the vapors in a condensation apparatus at from 1.09 to 102.4 bar and from 102 to 230° C., the temperature not falling below 102° C. at any point of the condensation apparatus, and those surfaces of the condensation apparatus which come into contact with the vapors being coated with a liquid film of condensed residual monomers.

    8.
    发明专利
    未知

    公开(公告)号：DE50210711D1

    公开(公告)日：2007-09-27

    申请号：DE50210711

    申请日：2002-05-24

    Applicant: BASF AG

    Inventor： HUEFFER STEPHAN ,  RATH HANS PETER ,  LANG GABRIELE ,  KREMESKOETTER JENS ,  STOECKELMANN ELMAR

    IPC: C08F10/10 ,  C08F2/00 ,  C08F2/01 ,  C08F2/06 ,  C08F4/00 ,  C08F4/06 ,  C08F4/12 ,  C08F4/16 ,  C08F4/58 ,  C08F10/00 ,  C08F10/08 ,  C08F110/06 ,  C08F110/10

    Abstract: Homo- and copolymers of isobutene are prepared by continuous cationic polymerization of isobutene or mixtures of isobutene with ethylenically unsaturated comonomers in the presence of an initiator system comprising:i) a Lewis acid selected from covalent metal-halogen compounds and covalent semimetal-halogen compounds andii) at least one aprotic organic compound I having at least one functional group FG which forms a carbocation or a cationic complex with the Lewis acid under polymerization conditions in an organic solvent inert with respect to the Lewis acid, by a process in which the polymerization is carried out in a tubular flow-through reactor which has a plurality of curves having an alternating direction of curvature.

    9.
    发明专利
    未知

    公开(公告)号：AT370168T

    公开(公告)日：2007-09-15

    申请号：AT02747321

    申请日：2002-05-24

    Applicant: BASF AG

    Inventor： HUEFFER STEPHAN ,  RATH HANS ,  LANG GABRIELE ,  KREMESKOETTER JENS ,  STOECKELMANN ELMAR

    IPC: C08F10/10 ,  C08F2/00 ,  C08F2/01 ,  C08F2/06 ,  C08F4/00 ,  C08F4/06 ,  C08F4/12 ,  C08F4/16 ,  C08F4/58 ,  C08F10/00 ,  C08F10/08 ,  C08F110/06 ,  C08F110/10

    Abstract: Homo- and copolymers of isobutene are prepared by continuous cationic polymerization of isobutene or mixtures of isobutene with ethylenically unsaturated comonomers in the presence of an initiator system comprising:i) a Lewis acid selected from covalent metal-halogen compounds and covalent semimetal-halogen compounds andii) at least one aprotic organic compound I having at least one functional group FG which forms a carbocation or a cationic complex with the Lewis acid under polymerization conditions in an organic solvent inert with respect to the Lewis acid, by a process in which the polymerization is carried out in a tubular flow-through reactor which has a plurality of curves having an alternating direction of curvature.

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