公开(公告)号：DE59707208D1

公开(公告)日：2002-06-13

申请号：DE59707208

申请日：1997-09-11

Applicant: BASF AG

Inventor： HAHN DR ,  BEUERMANN DR ,  DE GRAVE DR ,  KOEGEL WOLFRAM

IPC: C08J9/18

公开(公告)号：DE50204233D1

公开(公告)日：2005-10-20

申请号：DE50204233

申请日：2002-06-29

Applicant: BASF AG

Inventor： MALETZKO DR ,  KEPPELER DR ,  KORB HARDY ,  HAHN DR ,  DE GRAVE DR

IPC: C08J9/228 ,  C08J9/14 ,  C08J9/18 ,  C08L23/00

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.