Catalysts for polyurethane foam polyol premixes containing halogenated olefin blowing agents
AssigneeHoneywell International Inc.
InventorsMichael A. Ross, Ronald Grossman, David J. Williams, Clifford P. Gittere
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Abstract
The invention provides polyurethane and polyisocyanurate foams and methods for the preparation thereof. More particularly, the invention relates to closed-celled, polyurethane and polyisocyanurate foams and methods for their preparation. The foams are characterized by a fine uniform cell structure and little or no foam collapse. The foams are produced with a polyol premix composition which comprises a combination of a hydrohaloolefin blowing agent, a polyol, a silicone surfactant, and a non-amine catalyst used alone or in combination with an amine catalyst.
Claims20
A foamable composition comprising:
- a. a hydrohaloolefin blowing agent,
- b. one or more polyols,
- c. one or more surfactants, and
- d. a catalyst system comprising at least a first metal and at least a second metal, and at least one amine catalyst selected from n-metheyldicyclohexyl-amine and methyl(n-methylamino b-sodium acetate nonylphenol) 2- and combinations of these.
A polyol premix composition comprising:
- a. a hydrohaloolefin blowing agent,
- b. one or more polyols,
- c. one or more surfactants, and
- d. a non-amine catalyst selected from the group consisting of an a first metal catalyst and a second metal catalyst, wherein the metal of said first metal catalyst is not the same as the metal of said second catalyst, each of said first and second metal catalysts comprise an organic salt wherein the metal is selected from the group consisting of bismuth, lead, tin, zinc, chromium, cobalt, copper, iron, manganese, magnesium, potassium, sodium, titanium, mercury, zinc, antimony, uranium, cadmium, thorium, aluminum, nickel, cerium, molybdenum, vanadium, zirconium, and combinations thereof.
Dependencies are inferred from the claim text.