Process for preparing a thixotropic agent and its use

Details Process for preparing a thixotropic agent and its use Process for preparing a thixotropic agent and its use

C - Chemistry, Metallurgy

09

D

C09D 5/04 (2006.01) C07C 273/18 (2006.01) C08G 18/22 (2006.01) C08G 18/32 (2006.01) C08G 18/76 (2006.01) C07C 275/14 (2006.01)

Patent

CA 2305948

The invention relates to a process for preparing a solution that is active as a thixotropic agent and contains urea urethanes, in which monohydroxyl compounds are reacted with an excess of toluylene diisocyanate, the unreacted portion of the toluylene diisocyanate is removed from the reaction mixture and the monoisocyanate adduct obtained is further reacted with diamines in the presence of a lithium salt to form urea urethanes. The invention also relates to the use of the solution for imparting thixotropic properties to coating compounds.

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