POLYENUREAS AND METHOD OF MAKING THE SAME

摘要

A method of making a solid, crosslinked polymer by performing a reaction in a mixture of: 1) an imine selected from polyaldimines, hydroxyaldimines, polyketimines, and hydroxyketimines; 2) a polyisocyanate; and 3) a hydroxyl compound, if the imine is not a hydroxyimine. The imine and the hydroxyl compound are the only isocyanate-reactive compounds in the mixture. The hydroxyl compound is an alcohol, a glycol, or a polyol. The polymer comprises urea linkages formed from the imine and polyisocyanate and urethane linkages formed from the hydroxyl group of the hydroxyimine or the hydroxyl compound and the polyisocyanate, and the molar ratio of urea linkages to urethane linkages is at least 2:1. The reaction is performed in the absence of solvent.

主权项

1. A method of making a solid, crosslinked polymer, wherein the polymer is made by performing a reaction in a mixture comprising:
1) an imine selected from polyaldimines, hydroxyaldimines, polyketimines, and hydroxyketimines; 2) a polyisocyanate; and 3) a hydroxyl compound, if the imine is not a hydroxyimine; wherein the imine and the hydroxyl compound are the only isocyanate-reactive compounds in the mixture; wherein the hydroxyl compound is an alcohol, a glycol, or a polyol; wherein the polymer comprises urea linkages formed from the imine and polyisocyanate; wherein the polymer comprises urethane linkages formed from the hydroxyl group of the hydroxyimine or the hydroxyl compound and the polyisocyanate; wherein the reaction is performed in the absence of solvent; wherein the reaction forms a solid material; and wherein the molar ratio of urea linkages to urethane linkages is at least 2:1.