Process for continjuous preparation of melted workable polyurethane with improved softening property

Application Number: 00108724
Application Date: 2000.05.26
Publication Number: 1275583
Publication Date: 2000.12.06
Priority Information: 1999/5/26 DE 19924089.2
International: C08G18/08
Applicant(s) Name: Bayer AG
Inventor(s) Name: W. Kaufhold;W. Brauer;U. Lisenphild
Patent Agency Code: 72001
Patent Agent: pang lizhi
Abstract A process for the continuous preparation of melt processable polyurethane elastomers having improved softening behavior is disclosed. The process entails reacting a polyisocyanate, a polyol and a chain extender, which have a temperature of at least 170 DEG C., in a static mixer, wherein the reaction mixture is prepared. The reaction mixture is then metered into an extruder into which optional auxiliaries and/or further components are fed.