Isocyanate-based foam construction boards
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.
1. 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 an acyclic pentane and a blowing agent additive contained within the foam body, where the blowing agent additive has a Hansen Solubility Parameter of from 17.0 to 35.0 MPa-0.5, where the blowing agent additive has a boiling point, at one atmosphere, of less than 150° C., where said blowing agent additive is selected from the group consisting of ketones, aldehydes, ethers, esters, halogenated hydrocarbons, and aromatics, where the acyclic pentane and the blowing agent additive form a physical blowing agent mixture, where the physical blowing agent mixture includes from about 7 to about 35 mole % of the blowing agent additive based on the total moles of physical blowing agent mixture, where the closed-cell body is a polyurethane or polyisocyanurate foam body prepared by reacting an isocyanate-containing compound with an aromatic polyester polyol, and where the isocyanate-containing compound and the aromatic polyester polyol are reacted at a molar ratio to provide an iso index of at least 220; and
(ii) first and second facers attached to said first and second planar surfaces, respectively.
2. The construction board of claim 1 , where the foam body has a density of 1.0 to 2.5 lbs/ft 3 .
3. The construction board of claim 1 , where the foam body has an index of at least 225 and a density of 1.2 to 2.2 lbs/ft 3 .
4. The construction board of claim 1 , where the blowing agent additive has a Hansen Solubility Parameter of from 17.5 to 28.0 MPa −0.5 .
5. The construction board of claim 1 , where the blowing agent additive has a Hansen Solubility Parameter that is greater than 19.0 MPa −0.5 .
6. The construction board of claim 1 , where the blowing agent additive has a boiling point, at one atmosphere, of greater than 5° C.
7. The construction board of claim 1 , where blowing agent additive and the acyclic pentane are provided in amounts to provide a molar ratio of the blowing agent additive to the acyclic pentane of from about 1:20 to about 1:1.
8. The construction board of claim 1 , where blowing agent additive and the acyclic pentane are provided in amounts to provide a molar ratio of the blowing agent additive to the acyclic pentane of from about 1:4 to about 2:1.
9. The construction board of claim 1 , where the acyclic pentane and the blowing agent additive form a physical blowing agent mixture, and where the physical blowing agent mixture includes from about 10 to about 30 mole % of the blowing agent additive based on the total moles of physical blowing agent mixture.
10. The construction board of claim 1 , where the blowing agent additive is an aldehyde or a ketone.
11. The construction board of claim 1 , where the blowing agent additive is an ester.
12. The construction board of claim 1 , where the blowing agent additive is an ether.
13. The construction board of claim 1 , where the blowing agent additive is a halogenated hydrocarbon.
14. The construction board of claim 1 , where the blowing agent additive is an aromatic compound.