Acid-blocked pyrrolidine catalysts for polyurethane foam
AssigneeHuntsman Petrochemical Corporation
InventorsDiAnne Pham, Matthew T. Meredith, Robert A. Grigsby
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Abstract
The present disclosure relates to acid-blocked pyrrolidine catalysts for use in a polyurethane formulation. The polyurethane formulation includes the acid-blocked pyrrolidine catalyst, a compound containing an isocyanate functional group, an active hydrogen-containing compound and a halogenated olefin compound. The use of such acid-blocked pyrrolidine catalysts show surprisingly low reactivity with halogenated olefin compounds yet sufficient reactivity to catalyze polyurethane formation.
Claims9
A polyurethane formulation consisting essentially of:
- (i) an acid-blocked pyrrolidine catalyst corresponding to a mixture of compounds represented by a mixture of formula (1) and formula (2):
- where x is 4 and A is an ion of an acidic compound, wherein the acidic compound has a formula (OH)n—R—(COOH) m where R is hydrogen, an alkyl, alkenyl, cycloaliphatic, aromatic, or alkylaromatic group, n and m are integers between 0 and 3, with the proviso that n+m≥1 and when n=1 and m=0, R is aromatic or alkylaromatic;
- (ii) a compound containing an isocyanate functional group;
- (iii) an active hydrogen-containing compound;
- and (iv) a halogenated olefin compound.
A catalyst package consisting essentially of:
- (i) an acid-blocked pyrrolidine catalyst corresponding to a mixture of compounds represented by a mixture of formula (1) and formula (2)
- where x is 4 and A is an ion of an acidic compound, wherein the acidic compound has a formula (OH)n—R—(COOH) m where R is hydrogen, an alkyl, alkenyl, cycloaliphatic, aromatic, or alkylaromatic group, n and m are integers between 0 and 3, with the proviso that n+m≥1 and when n=1 and m=0, R is aromatic or alkylaromatic;
- and (ii) a halogenated olefin compound.
A method for producing a polyurethane material consisting essentially of contacting a compound containing an isocyanate functional group, an active hydrogen-containing compound and optional auxiliary components in the presence of an acid-blocked pyrrolidine catalyst corresponding to a mixture of compounds represented by a mixture of formula (1) and/or formula (2)
- where x is 4 and A is an ion of an acidic compound, wherein the acidic compound has a formula (OH)n—R—(COOH) m where R is hydrogen, an alkyl, alkenyl, cycloaliphatic, aromatic, or alkylaromatic group, n and m are integers between 0 and 3, with the proviso that n+m≥1 and when n=1 and m=0, R is aromatic or alkylaromatic;
- and a halogenated olefin compound.
Dependencies are inferred from the claim text.