Patent ID: 6344494
Filing Date: 2002-02-05
Classification: C08G

Abstract:
A method for the formation of a slabstock polyurethane foam comprising the steps of:a) providing a triol polyoxyalkylene polyether polyol having a plurality of internal blocks formed from oxyalkylene monomers with a plurality of terminal caps comprising ethylene oxide attached to said plurality of internal blocks, the internal blocks containing at least 80% by weight propylene oxide based on the total weight of all of the oxyalkylenes in said internal blocks and the amount of ethylene oxide in the terminal caps comprising from 5 to 25% by weight based on the total weight of the polyol, said polyol having a degree of unsaturation of less than or equal to 0.015 meq/g KOH; b) providing a polyisocyanate component; c) providing a catalyst; d) providing water as a blowing agent at a level of between 3 to 7% by weight based on the total weight of the polyol; and e) combining the polyol with the polyisocyanate component, the catalyst and the water to form a slabstock polyurethane foam having a core density of from 1.1 to 2.0 pounds per cubic foot.