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34 records (took 0.021 seconds)

    12.
    发明专利
    未知

    公开(公告)号：DE4200559A1

    公开(公告)日：1993-07-15

    申请号：DE4200559

    申请日：1992-01-09

    Applicant: BASF AG

    Inventor： DE GRAVE ISIDOOR DR ,  KOEGEL WOLFRAM ,  HAHN KLAUS DR

    IPC: C08J9/14 ,  C08J9/16 ,  C08J9/18 ,  C08J9/232

    Abstract: Polyolefin foams having a density of from 0.01 to 0.1 g/cm3 and having 2 to 1000 cells/mm2 and containing a resin acid, a lower alkyl ester or a resin acid or (hydro) abietyl phthalate as organic foaming aid have a homogeneous cell structure.

    Moulded bodies of foamed polyolefin - free from cavities, useful as packing and insulation material
    15.
    发明专利
    Moulded bodies of foamed polyolefin - free from cavities, useful as packing and insulation material 未知

    公开(公告)号：DE2331305A1

    公开(公告)日：1975-01-23

    申请号：DE2331305

    申请日：1973-06-20

    Applicant: BASF AG

    Inventor： TATZEL HERMANN ,  KOEGEL WOLFRAM ,  BECK GILBERT DIPL CHEM ,  ZUERN LUDWIG DIPL CHEM DR ,  CAESAR ARNDT CHRISTIAN

    IPC: C08J9/236 ,  C08J9/22 ,  C08L23/00

    Abstract: Prodn. of moulded bodies comprises mixing finely divided foam-forming polyolefin particles with 0.3 to 4 g., pref. 0.6-2 g., (per 1. of polyolefin) of a solvent-free hardenable blinder, pressing together the mixt. to 5-70% (pref. 40-70%) of its bulk volume, and hardening under pressure, and introducing needles of dia. is not >5 mm, into the mixt. before, during or after the step of pressing the mixt. and removing the needles again before the hardening step. The polymers are derived from 2-4C olefins, and have an X-ray crystallinity at 25 degrees C >25 wt%., e.g. homopolymers or copolymers of ethylene and propylene; esp. copolymers of ethylene with esters of (meth)acrylic acid or vinylcarboxylic acid esters contg. >=50 wt% of ethylene units. The introduction and removal of the needles forms channels through which air can escape from the mixt. and the resulting moulded bodies are free from cavities. The prods. can be used for forming shock-absorbing packing matl., sound-absorbing plates, and insulation in the building industry.

    17.
    发明专利
    未知

    公开(公告)号：DE59609686D1

    公开(公告)日：2002-10-24

    申请号：DE59609686

    申请日：1996-12-04

    Applicant: BASF AG

    Inventor： FISCHER DR ,  RIEGER DR ,  HAHN DR ,  DE GRAVE DR ,  KOEGEL WOLFRAM

    IPC: B29C44/34 ,  C08J9/04 ,  C08J9/16 ,  C08J9/22 ,  C08J9/228 ,  C08L23/14

    Abstract: The preparation of polyolefin foam particles of bulk density 20 - 100 g / l comprises: (A) pre-foamed particles of bulk density 120 - 400 g / l are prepared by extrusion and granulation of polyolefin containing propellent ; and (B) the particles are further foamed in one or more steps without the use of propellent, by treating with 1.5 - 8 bar steam for 5 - 120 seconds at 110 - 170 degrees C.

    18.
    发明专利
    未知

    公开(公告)号：DE59601153D1

    公开(公告)日：1999-02-25

    申请号：DE59601153

    申请日：1996-05-17

    Applicant: BASF AG

    Inventor： KOEGEL WOLFRAM ,  DE GRAVE ISIDOOR ,  HAHN KLAUS ,  FISCHER JOACHIM

    IPC: C08J9/12 ,  C08J9/18 ,  C08L23/02

    Abstract: PCT No. PCT/EP96/02116 Sec. 371 Date Nov. 24, 1997 Sec. 102(e) Date Nov. 24, 1997 PCT Filed May 17, 1996 PCT Pub. No. WO96/37541 PCT Pub. Date Nov. 28, 1996Expanded polyolefin particles are produced by impregnation of polyolefin granules with a volatile blowing agent in suspension under pressure and subsequent decompression. The blowing agent used is ammonia.

    20.
    发明专利
    未知

    公开(公告)号：NO970804D0

    公开(公告)日：1997-02-21

    申请号：NO970804

    申请日：1997-02-21

    Applicant: BASF AG

    Inventor： SCHWEINZER JUERGEN ,  FISCHER JOACHIM ,  GRAVE ISIDOOR DE ,  KOEGEL WOLFRAM

    IPC: B29C44/34 ,  C08J9/18 ,  C08L23/08 ,  C08L23/14

    Abstract: PCT No. PCT/EP95/03190 Sec. 371 Date Feb. 24, 1997 Sec. 102(e) Date Feb. 24, 1997 PCT Filed Aug. 11, 1995 PCT Pub. No. WO96/06129 PCT Pub. Date Feb. 29, 1996The invention relates to a process for the production of expanded polyolefin beads by impregnating polyolefin particles with volatile blowing agents in a fluidized bed.

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