Patent ID: 7897652

Claim:
An energy absorbing polyurethane foam composition comprising: at least one polyether polyol having an average molecular weight from 100-20,000; a methylene bisdiphenyl-isocyanate having a functionality of 2.4 isocyanate groups per molecule and present at a concentration of 35-175 parts by weight per hundred parts polyol; a tackifying resin; a surfactant; a blowing agent, and a catalyst; and wherein the tackifying resin is selected from the group consisting of hydrocarbon resin, rosin ester and a combination thereof, the polyurethane foam composition having energy absorbing capabilities equivalent to or greater than the energy absorbing capability exhibited by a 15 mm thickness of the polyurethane foam composition decelerating a mass of 5 to 6 kg dropped from a height of approximately one meter at a rate of 413 times 9.8 m/s 2 .