A process is provided for producing semi-rigid polyurethane foams having exceptional shock-absorbing properties, even after repeated compression, prepared by the reaction of a polyisocyanate; a polyether polyol having a molecular weight within the range from about 2,000 to about 10,000; from about 1...http://www.google.fr/patents/US4134610?utm_source=gb-gplus-shareBrevet US4134610 - Process for the preparation of semi-rigid polyurethane foam having exceptional shock-absorbing properties and vehicle bumpers thereof
Process for the preparation of semi-rigid polyurethane foam having ...
