Patent ID: 6258867
Filing Date: 2001-07-10
Classification: C08G,C08J,C08L

Abstract:
A method for making an energy-absorbing foam with polyurethane filler particles comprising reacting:A) a polymethylene poly(phenyl) isocyanate component withB) a polyol component comprising:(i) a first polyol comprising at least one polyol having a hydroxyl functionality of 2 or 3 and molecular weight of from about 1,000 to about 8,000 in an amount ranging from about 30 to 80 parts, based on the weight of the polyol component, and a second polyol comprising at least one polyol having a functionality greater than 2 and molecular weight less than 1,000 in an amount of from about 20 to about 70 parts by weight, based on the weight of the polyol component,(ii) a surfactant component having a viscosity that is less than about 2500 cp having a polyether-siloxane silicone cell-opening surfactant which has a viscosity greater than 2500 cp and a number average molecular weight of at least 9,000 in an amount that is at least about 0.3 wt. %, based on the weight of the polyol component,(iii) a blowing agent in an amount that is at least 1 wt. %, based on the total weight of the polyol component,(iv) a catalyst component in an amount that is at least about 0.05 wt. %, based on the weight of the polyol component, andC) polyurethane filler particles in an amount that is at least 10 parts, based on the weight of the polyol component.