Aromatic polyester polyols
AssigneeE. I. Du Pont de Nemours and Company
InventorsThomas Barber, Thomas McClellan, Melanie McClellan
Life of this patent
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Abstract
Aromatic polyester polyols, and foams produced therefrom, having an acid number below 3.0 mg/KOH/g, wherein the aromatic polyester polyol is the reaction product of a reaction mixture comprising an acid component, a glycol component, and a urethane catalytic activity agent comprising at least one of a non-alkoxylated aminoalcohol and a metal esterification catalyst.
Claims15
1-25. (canceled)
A process for making a polyurethane foam, comprising reacting an aromatic polyester polyol wherein the polyester polyol has an acid number of below 3.0 mg/KOH/g, and wherein said aromatic polyester polyol is the reaction product of a reaction mixture comprising:
- (a) an acid component;
- (b) a glycol component;
- and
- (c) a urethane catalytic activity agent that comprises a metal esterification catalyst and a non-alkoxylated aminoalcohol;
- wherein residual metal esterification catalyst and glycolates, carboxylates, and other coordination compounds of the metal resulting from formation of the aromatic polyester polyol are not substantially removed from the aromatic polyester polyol prior to reacting the aromatic polyester polyol to form a polyurethane foam;
- with an organic polyisocyanate in the presence of a surfactant and a blowing agent, without adding a urethane catalyst.
A process for making a polyurethane foam, comprising reacting an aromatic polyester polyol having an acid number below 3.0 mg/KOH/g, wherein said aromatic polyester polyol is the reaction product of a reaction mixture comprising:
- (a) an acid component;
- (b) a glycol component;
- and
- (c) a urethane catalytic activity agent comprising a non-alkoxylated aminoalcohol and a metal esterification catalyst, wherein:
- (i) said aromatic polyester polyol has a polyurethane foam reaction polymerization rate in an HCFC-141b blown system that is increased at least 367% by the presence of said urethane catalytic activity agent;
- (ii) said aromatic polyester polyol has a polyurethane foam reaction polymerization rate in a water/hydrocarbon co-blown system that is increased at least 295% by the presence of said urethane catalytic activity agent;
- or
- (iii) said aromatic polyester polyol has a polyurethane foam reaction polymerization rate in a water blown system that is increased by the presence of said urethane catalytic activity agent;
- wherein residual metal esterification catalyst and glycolates, carboxylates, and other coordination compounds of the metal resulting from formation of the aromatic polyester polyol are not substantially removed from the aromatic polyester polyol prior to reacting the aromatic polyester polyol to form a polyurethane foam;
- with an organic polyisocyanate in the presence of a surfactant and a blowing agent, without adding a urethane catalyst.
28-29. (canceled)
The process of 26 or 27 wherein the non-alkoxylated aminoalcohol is a tertiary amine.
Dependencies are inferred from the claim text.