Search International and National Patent Collections

1. (WO2018036921) PROCESS FOR PRODUCING POLYMER FOAMS COMPRISING IMIDE GROUPS

Pub. No.:    WO/2018/036921    International Application No.:    PCT/EP2017/070923
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Sat Aug 19 01:59:59 CEST 2017
IPC: C08G 18/48
C08G 18/78
C08G 18/20
C08G 18/30
C08G 101/00
Applicants: BASF SE
Inventors: MUELLER-CRISTADORO, Anna
Title: PROCESS FOR PRODUCING POLYMER FOAMS COMPRISING IMIDE GROUPS
Abstract:
The present invention relates to a process for producing a polymer foam comprising reacting components A to C in the presence of component D and optionally E or of an isocyanate-functional prepolymer of components A and B with component C in the presence of component D and optionally E, the total amount of which is 100 wt%, (A) 35 to 75 wt% of at least one polyisocyanate component A, wherein 10 to 100 wt% of component A is a condensation product comprising polyimide groups and obtained by condensing at least one polyisocyanate component with at least one polycarboxylic acid having at least 3 COOH groups per molecule or anhydride thereof, (B) 5 to 50 wt% of at least one polyol component B, (C) 1 to 10 wt% of water as component C, and (D) 0.01 to 3 wt% of at least one Lewis base component D, (E) 0 to 5 wt% of at least one foam stabilizer component E, wherein said reacting is effected to release carbon dioxide.