PROCESS FOR PREPARING ELASTOMERIC POLYURETHANE OR POLYURETHANE-UREA POLYMERS PREPARED USING LOW UNSATURATION POLYETHERS

摘要

A process is disclosed for preparing a polyurethane or polyurea elastomer by reacting in a closed mold a reaction mixture comprising a polyisocyanate and a relatively high equivalent weight polyether. The process is characterized by employing as said polyether a polymer or copolymer of propylene oxide having at least two hydroxyl groups per molecule, an equivalent weight from 1000 to 5000 and a monofunctional species content of about 0.04 milliequivalents/gram of polymer or less.