公开(公告)号：DE4437754A1

公开(公告)日：1996-04-25

申请号：DE4437754

申请日：1994-10-21

Applicant: BASF AG

Inventor： DECKERS ANDREAS DR ,  BERGER ALBIN DR ,  HOFMANN JUERGEN ,  KLIMESCH ROGER-GUENTHER DR ,  FARWERCK KARL-PETER ,  OHLIG HILMAR

IPC: A61K8/31 ,  A61Q19/00 ,  B29B15/00 ,  C08F8/50 ,  C08F10/00 ,  C08F10/06 ,  C08F110/06 ,  C08J11/12 ,  C09D7/12 ,  C09D11/12 ,  C09D191/08 ,  B29B17/00 ,  B29B7/48 ,  A61K7/48 ,  G03G9/08

Abstract: Thermomechanical degradation of polyolefin(s) is carried out in a twin-screw extruder without the use of any additional degradation appts., at 300-500 degrees C and 1-100 bar over a mean dwell time of 0.5-10 min., during which the pressure is (a)periodically altered by 0.5-30 bar. Low molecular wt. polyolefin waxes prepd. by this method are also claimed.