公开(公告)号：DE102005004967A1

公开(公告)日：2006-08-10

申请号：DE102005004967

申请日：2005-02-03

Applicant: BASF AG

Inventor： SCHOLZ GUENTER ,  MOURS MARIAN ,  LAWRENZ SVEN ,  PAPENFUS HORST ,  BAHR CHRISTOPH ,  KRECH RUEDIGER

IPC: C08G18/08 ,  C08G18/28 ,  C08L75/04

Abstract: The present invention relates to a process for the continuous production of thermoplastically processable polyurethane elastomers, by metering a polyisocyanate (A), a proportion of 1-80 equivalent%, based on the isocyanate group content of the polyisocyanate (A), of a compound (B) having an average of at 1.8-3.0 hydrogen atoms having Zerewitinoff activity, with an average molar mass of 450-5000 g/mol, and a proportion of 12-99 equivalent%, based on the isocyanate group content of the polyisocyanate (A), of a chain extender (C), into a self-cleaning twin-screw extruder whose diameter is 32-62 mm, which is operated at shear rates above 6000 s−1 and residence times of 1-20 seconds, and then bringing the mixture from the self-cleaning twin-screw extruder into a second apparatus in order to complete the reaction.

公开(公告)号：DE102007037642A1

公开(公告)日：2008-03-13

申请号：DE102007037642

申请日：2007-08-10

Applicant: BASF AG

Inventor： KAMINSKY TORBEN ,  BUETTNER UWE ,  PAPENFUS HORST

IPC: B29B9/16 ,  B29B9/06 ,  F16L55/46

Abstract: Claimed is a water supply and recovery system forming part of a process for the production thermoplastic polyurethane and its extrusion. The water supply system consists of a pump, a cavity wall spiral pipe, an input point for solid substances, a solids removal station, and a pig insert station. The pig insert station is downstream from the pump.

公开(公告)号：DE10123002C1

公开(公告)日：2002-08-08

申请号：DE10123002

申请日：2001-05-11

Applicant: BASF AG

Inventor： BUDER BERNDT ,  BIEDERMANN ANJA ,  BOLLMANN HEINZ ,  MUELLER JUERGEN ,  PAPENFUS HORST ,  KRECH RUEDIGER ,  MOENTER WOLFGANG

IPC: B29C44/50 ,  B29C47/40 ,  B29C67/24 ,  C08G18/08 ,  C08G18/10 ,  C08G18/42 ,  C08G18/76 ,  C08G18/79 ,  B29B7/74 ,  B29B7/48