No volatile or non-volatile by-products are produced via this reaction, resulting in porous-free polyurethanes and an intermolecular hydrogen bond (Figure 1) that seems to be responsible for lowering the susceptibility of the backbone to hydrolysis. This results in a substantial increase of the chemical resistance.
Polyurethanes have an inherent weakness because of their molecular composition. Within their polymer structure are hydrolytically unstable bonds, making the material vulnerable to environmental degradation. By modifying the structure of the polymer, a new and promising method of raising hydrolytic stability is introduced and readily displayed in nonisocyanate polyurethane - a modified polyurethane material with lower permeability, increased resistance properties and safe fabrication processes.