Of with ethylene ica unsaturated aet preferential monomer grafted poly alkylene ether glycols derived polyurethane - elastomeric

摘要

Flexible automobile exterior body parts are molded from a polyurethane elastomer prepared from a reaction mixture comprising: PP A. A "GRAFT" POLYOL PREPARED BY THE IN SITU POLYMERIZATION OF ONE OR MORE ETHYLENICALLY UNSATURATED MONOMERS IN A POLY(OXYPROPYLENE)- POLY(OXYETHYLENE) GLYCOL OF MOLECULAR WEIGHT FROM ABOUT 1750 TO ABOUT 4000 AND CONTAINING FROM 15 TO 50% OXYETHYLENE GROUPS BY WEIGHT,P PB. METHYLENEBIS(4-PHENYLISOCYANATE),PPC. 1,4- BUTANEDIOL.