Catalysis of the reaction between isocyanates and protonic substrates. III. Influence of the addition of a cosolvent on the polyurea foaming process

Polyurea foams can be produced from nonmiscible water and polyisocyanates. The addition of a cosolvent improves the homogeneity of the reaction medium and enhances the effectiveness of any catalyst, preferably soluble in water. Cosolvents, exhibiting an intrinsic catalytic activity, display a regulating effect on the rise profile of the foams and allow for defining performant and less expensive formulations. Copyright © 1982 John Wiley & Sons, Inc.