Dimensionally stable closed-cell and rigid foams produced with methylal blowing agent
AssigneesVentrex Systems, LLC, Lambiotte et Compagnie S.A., Maroon Group, LLC
InventorIbrahim SENDIJAREVIC
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Abstract
A method of producing a closed-cell and rigid foam. The method comprises reacting an isocyanate composition including one or more polyisocyanates and a polyol composition including one or more polyols including one or more aromatic polyester polyols having a hydroxyl functionality of greater than 2 and one or more physical and/or chemical blowing agents including methylal to form a closed-cell and rigid foam configured to retain at least 85% of an initial volume of the closed-cell and rigid foam when exposed to about 97% relative humidity at about 70° C. for at least seven or more days.
Claims21
A method of producing a closed-cell and rigid foam, the method comprising:
- reacting an isocyanate composition including one or more polyisocyanates and a polyol composition including one or more polyols including one or more aromatic polyester polyols having a hydroxyl functionality of greater than 2 and one or more physical and/or chemical blowing agents including methylal to form the closed-cell and rigid foam configured to retain at least 85% of an initial volume of the closed-cell and rigid foam when exposed to about 97% relative humidity at about 70° C. for at least seven or more days.
A polyol composition comprising:
- one or more polyols including one or more aromatic polyester polyols having a hydroxyl functionality of greater than 2;
- and
- one or more physical and/or chemical blowing agents including methylal,
- one or more surfactants,
- the polyol composition is reactive with an isocyanate composition to produce a closed-cell and rigid foam configured to retain at least about 85% of its initial volume when exposed to about 97% relative humidity at about 70° C. for at least seven or more days.
A closed-cell and rigid foam configured to retain at least 85% of an initial volume of the closed-cell and rigid foam when exposed to about 97% relative humidity at about 70° C. for at least seven or more days and produced by the step comprising:
- reacting an isocyanate composition including one or more polyisocyanates and a polyol composition including one or more polyols including one or more aromatic polyester polyols having a hydroxyl functionality of greater than 2 and one or more physical and/or chemical blowing agents including methylal.
Dependencies are inferred from the claim text.