THIXOTROPIC POLYUREA COMPOSITIONS

摘要

Disclosed herein are polyurea compositions comprising the reaction product of: (a) a polyphenyl polymethylene polyisocyanate or a urea-modified prepolymer thereof and (b) a mixture of amines comprising (i) aminocrotonate polyether, and (ii) a low molecular weight aromatic or cycloaliphatic diamine or mixture thereof. By selecting appropriate blends of aminocrotonate polyethers and low molecular weight polyamines, it is now possible to design all-urea formulations with non-sagging performance.