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US 12,291,620 B2Granted
Isocyanate-based foam construction boards
AssigneeHolcim Technology Ltd
InventorsJohn B. Letts, Chunhua Yao, Michael J. Hubbard
Life of this patent
Estimating the term…
Abstract
A construction board comprising (i) a foam body having a generally planar shape with first and second planar surfaces, where said foam body is a closed-cell foam body including pentane and a blowing agent additive that has a Hansen Solubility Parameter that is greater than 17 MPa−0.5 contained within the foam body; and (ii) first and second facers attached to said first and second planar surfaces, respectively.
Claims18
A foam construction board prepared by a process comprising:
- (i) providing an A-side reactant stream that includes an isocyanate-containing compound;
- (ii) providing a B-side reactant stream that includes a polyester polyol, where the B-side reactant stream includes a blowing agent that includes an acyclic pentane and a blowing agent additive that has a Hansen Solubility Parameter (δt) that is greater than 17 MPa−0.5;
- and
- (iii) mixing the A-side reactant stream with the B-side reactant stream to produce a reaction mixture, to thereby form a foam construction board including the acyclic pentane and blowing agent additive.
1 more element
A construction board prepared by a process comprising:
- (i) combining a polyester polyol, an isocyanate, an acyclic pentane blowing agent, and a blowing agent additive that has a Hansen Solubility Parameter (δt) that is greater than 17 MPa−0.5, and less than 1.5 parts by weight water per 100 parts by weight polyol to form a foam-forming mixture where the ratio of polyol to isocyanate provides a closed-cell foam having an Index of at least 210, and where the amount of acyclic pentane, blowing agent additive, and any water present provide a closed-cell foam having a density of 1.0 to 2.5 lbs/ft3, and where the acyclic pentane and blowing agent additive form a blowing agent mixture, and where the blowing agent mixture includes from about 7 to about 35 mole % blowing agent additive based on the total moles of blowing agent mixture;
- (ii) depositing the foam-forming mixture on a facer;
- and
- (iii) heating the foam-forming mixture to form a closed-cell foam.
1 more element
Dependencies are inferred from the claim text.