PTMEG polyurethane elastomers employing monofunctional polyethers

摘要

The addition of minor quantities of a hydroxyl-functional polyoxyalkylene monol to a PTMEG-derived isocyanate-terminated prepolymer during prepolymer preparation enables the preparation of glycol extended polyurethane elastomers which exhibit improved physical properties, particularly elongation, tensile strength, and tear strength, without significantly affecting elastomer hardness.