公开(公告)号：AT71876T

公开(公告)日：1992-02-15

申请号：AT89123419

申请日：1989-12-19

Applicant: BASF AG

Inventor： HAHN KLAUS DR ,  GUHR UWE DR ,  NAARMANN HERBERT DR ,  RUPPERT GEORG ,  BACK WOLF-DIETER DR ,  DEMBEK GERHARD DR

IPC: B29B9/06 ,  B29C44/34 ,  B29C69/00 ,  C08J9/00 ,  C08J9/16 ,  C08K5/00 ,  C08K5/01 ,  C08K5/02 ,  C08L25/06 ,  B29C67/22

公开(公告)号：DE3708291A1

公开(公告)日：1988-09-22

申请号：DE3708291

申请日：1987-03-14

Applicant: BASF AG

Inventor： TATZEL HERMANN ,  ZUERN LUDWIG DR ,  ZETTLER HANS DIETER ,  SCHNEIDER WOLFGANG DR ,  DEMBEK GERHARD DR

IPC: B29C44/00 ,  B29B9/06 ,  B29C44/34 ,  B29C44/50 ,  B29K23/00 ,  C08J9/16 ,  C08J9/22 ,  C08J9/228 ,  B29C67/20

Abstract: Polyolefin foams which have a density of from 30 to 300 g/l, do not exhibit after-shrinkage and possess taut cells are prepared by letting down a polyolefin/blowing agent gel, the latter first being let down to 0.1-10 bar gage pressure and the foam being kept at this pressure until it has cooled to at least 20 DEG C. below the expansion temperature.