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101 records (took 0.025 seconds)

    83.
    发明专利
    未知

    公开(公告)号：AT286935T

    公开(公告)日：2005-01-15

    申请号：AT00929483

    申请日：2000-05-03

    Applicant: BASF AG

    Inventor： BRAUN FRANK ,  GLUECK GUISCARD ,  HAHN KLAUS ,  WITT UWE ,  DE GRAVE ISIDOOR

    IPC: C08J9/18 ,  C08L67/02

    Abstract: In a process for preparing expanded or expandable polymer beads based on biodegradable saturated polyesters made from at least one diol and from at least one dicarboxylic acid,A. polymer pellets are dispersed in a liquid,B. a volatile blowing agent is injected into the dispersion and made to impregnate the pellets at an elevated temperature,C. the pressure on the dispersion is reduced at an elevated temperature, whereupon the pellets comprising blowing agent expand to give foam, and, respectively,D. the pellets are isolated from the liquid.

    85.
    发明专利
    未知

    公开(公告)号：AT251655T

    公开(公告)日：2003-10-15

    申请号：AT99913279

    申请日：1999-03-19

    Applicant: BASF AG

    Inventor： GLUECK GUISCARD ,  HAHN KLAUS ,  GELLERT ROLAND

    IPC: B29C44/34 ,  C08J9/22 ,  C08L25/04

    Abstract: The invention relates to a process for the preparation of expanded polystyrene particles in which polystyrene beads containing water as the sole expanding agent are expanded. The process involves the following stages:A) the polystyrene beads are pre-expanded at temperatures above 100° C.,B) the pre-expanded particles are dried in dry air at temperatures between 20° and 95° C. over a period of from 1 to 10 hours,C) the dried expanded particles are further expanded with steam at temperatures ranging from 100° to 140° C., andD) the stages b and c are repeated as often as is necessary to achieve the desired bulk density.

    88.
    发明专利
    未知

    公开(公告)号：DE59901682D1

    公开(公告)日：2002-07-11

    申请号：DE59901682

    申请日：1999-11-05

    Applicant: BASF AG

    Inventor： GLUECK GUISCARD

    IPC: C08J9/00 ,  C08J9/16 ,  C08K3/04 ,  C08L25/04

    Abstract: The invention relates to expandable polystyrene beads which comprise graphite particles with an average particle size of more than 50 mum, and also to a process for their preparation by free-radical polymerization of styrene in aqueous suspension. The graphite particles, suspended in styrene, are added to the polymerization mixture at a conversion of from 10 to 100%.

    89.
    发明专利
    未知

    公开(公告)号：AT218596T

    公开(公告)日：2002-06-15

    申请号：AT99916835

    申请日：1999-03-19

    Applicant: BASF AG

    Inventor： GLUECK GUISCARD ,  HAHN KLAUS ,  DODEL PETER

    IPC: B29C44/10 ,  C08J9/12 ,  C08J9/16 ,  C08L25/06

    Abstract: A process prepares styrene polymers comprising water as sole blowing agent by mixing a polystyrene melt with water and with an emulsifying agent in an extruder, extruding the melt into a waterbath and pelletizing the cooled extrudate.

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