One-shot cold molded flexible polyurethane foam from low primary hydroxyl polyols and process for the preparation thereof
AssigneeArco Chemical Technology, L.P.
InventorsMark R. Kinkelaar, Frank E. Critchfield, James L. Lambach
Life of this patent
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Abstract
Cold molded flexible polyurethane foams may be prepared from low primary hydroxyl Polyoxyalkylene polyols when polyoxyalkylene polyols having an unsaturation of 0.02 meq/g or less provide the substantial portion of the polyol component.
Claims20
A process for preparing cold-molded polyurethane flexible foam, comprising reacting:
- a) one or more di- or polyisocyanates at an isocyanate index of from 70 to about 130;
- with
- b) a low primary hydroxyl polyol component comprising in substantial part one or more polyoxypropylene/polyoxyethylene random copolymers having an unsaturation of less than about 0.02 meq/g, and a primary hydroxyl content of less than 50 mol percent;
- and
- c) an effective amount of water as a blowing agent.
A cold-molded polyurethane foam comprising the reaction product of:
- a) one or more di- or polyisocyanates at an isocyanate index of from 70 to about 130;
- with
- b) a low primary hydroxyl polyol component comprising in substantial part one or more polyoxypropylene/polyoxyethylene random copolymers having an unsaturation of less than about 0.02 meq/g, and a primary hydroxyl content of less than 50 mol percent;
- and
- c) an effective amount of water as a blowing agent.
A cold molded flexible polyurethane foam comprising the reaction product of an isocyanate component comprising TDI, MDI, or a mixture thereof, at an isocyanate index of from about 90 to about 110, with a polyol component comprising in substantial part one or more polyoxypropylene/polyoxyethylene copolymer polyols individually having an unsaturation of less than 0.02 meq/g and a primary hydroxyl content of 35 mol percent or less, said polyol component containing not more than 30% by weight of polyoxyalkylene polyols having a primary hydroxyl content of 70 mol percent or more.
Dependencies are inferred from the claim text.