Process for preparing a storage-stable rheologically active urea-urethane solution with broad compatibility

摘要

The invention relates to a process for the preparation of a solution containing urea urethanes which is effective as a thixotropic agent, in which at least two structurally different monohydroxy compounds are reacted with an excess of tolylene diisocyanate to form monoisocyanate adducts, the unreacted part of the tolylene diisocyanate is removed and the resulting ones Monoisocyanate adducts are reacted with diamines in an aprotic solvent in the presence of a lithium salt to form urea urethanes. The invention also relates to the use of the solution for thixotroping coating agents.