US 12,291,620 B2
Isocyanate-based foam construction boards
John B. Letts, Carmel, IN (US); Chunhua Yao, Carmel, IN (US); and Michael J. Hubbard, Murfreesboro, TN (US)
Assigned to Holcim Technology Ltd, Zug (CH)
Filed by Holcim Technology Ltd., Zug (CH)
Filed on Dec. 10, 2020, as Appl. No. 17/117,667.
Application 17/117,667 is a continuation in part of application No. 16/209,038, filed on Dec. 4, 2018, granted, now 10,870,987.
Claims priority of provisional application 62/594,222, filed on Dec. 4, 2017.
Prior Publication US 2021/0095090 A1, Apr. 1, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08J 9/14 (2006.01)
CPC C08J 9/142 (2013.01) [C08J 9/147 (2013.01); C08J 2201/00 (2013.01); C08J 2203/12 (2013.01); C08J 2205/052 (2013.01); C08J 2375/04 (2013.01)] 18 Claims
OG exemplary drawing
 
1. 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.