Patent Number: 6,294,637

Title: Continuous preparation of melt-processable polyurethane in a twin screw extruder

Abstract: The invention relates to a process for the continuous preparation of melt-processable polyurethanes, wherein an isocyanate-terminated prepolymer is intensively mixed with chain extender at temperatures of <200.degree. C., and the mixture obtained is converted to melt processable polyurethane in a twin screw extruder under quasi-adiabatic reaction conditions.

Inventors: Brauer; Wolfgang (Leverkusen, DE), Muller; Friedemann (Neuss, DE), Winkler; Jurgen (Langenfeld, DE), Heidingsfeld; Herbert (Frechen, DE)

Assignee: Bayer AG

International Classification: C08G 18/08 (20060101); C08G 18/10 (20060101); C08G 18/66 (20060101); C08G 18/00 (20060101); C08G 018/10 (); C08G 018/32 (); C08G 018/38 ()

Expiration Date: 09/25/2018