Branched polyurethanes, formulations comprising them, and their use for thickening aqueous systems

摘要

Branched polyurethanes which are preparable by reactingA) one or more aliphatic and/or aromatic isocyanates having a functionality of at least three withB) from 90.0 to 99.8 eq. % of one or more polyethers of the structureandC) from 0.2 to 10.0 eq. % of at least one of the compounds from the following group:a. polyethersb. polyether polydimethylsiloxane diolsc. polyester polydimethylsiloxane diolsd. polydimethylsiloxane diolse. polydimethylsiloxane diaminesf. polyether diamines.