le of water (available under the trade designation Desmodur N from Bayer AG). the adduct of 1 molecule of trimethylol propane to 3 molecules of toluene diisocyanate (available under the trade designation Desmodur L from Bayer AG). the adduct of 1 molecule of trimethylol propane to 3 molecules of isophorone diisocyanate, compounds such as 1,3,5-triisocyanatobenzene and 2.4.6-triisocyanatotoluene, a