US 11,732,100 B2
Polyol premixes, thermally insulating rigid polyurethane foams and methods for their production
Rick L. Adkins, Canonsburg, PA (US); Brandon W. Parks, McKees Rocks, PA (US); Steve L. Aprahamian, McMurray, PA (US); Carson C. Miller, Pittsburgh, PA (US); and Emily E. Connor, Canonsburg, PA (US)
Assigned to Covestro LLC, Pittsburgh, PA (US)
Filed by Covestro LLC, Pittsburgh, PA (US)
Filed on Jul. 1, 2022, as Appl. No. 17/810,388.
Application 17/810,388 is a division of application No. 16/594,183, filed on Oct. 7, 2019, granted, now 11,407,874.
Prior Publication US 2022/0348732 A1, Nov. 3, 2022
Int. Cl. C08J 9/08 (2006.01); C08G 18/12 (2006.01); C08G 18/18 (2006.01); C08G 18/20 (2006.01); C08G 18/30 (2006.01); C08G 18/38 (2006.01); C08G 18/42 (2006.01); C08G 18/48 (2006.01); C08G 18/50 (2006.01); C08G 18/76 (2006.01); C08J 9/14 (2006.01)
CPC C08J 9/08 (2013.01) [C08G 18/12 (2013.01); C08G 18/1808 (2013.01); C08G 18/1816 (2013.01); C08G 18/2036 (2013.01); C08G 18/30 (2013.01); C08G 18/3819 (2013.01); C08G 18/4244 (2013.01); C08G 18/4816 (2013.01); C08G 18/4829 (2013.01); C08G 18/5024 (2013.01); C08G 18/5027 (2013.01); C08G 18/7664 (2013.01); C08J 9/141 (2013.01); C08G 2110/005 (2021.01); C08G 2110/0025 (2021.01); C08J 2203/02 (2013.01); C08J 2203/14 (2013.01); C08J 2203/184 (2013.01); C08J 2205/052 (2013.01); C08J 2205/10 (2013.01); C08J 2207/00 (2013.01); C08J 2375/04 (2013.01)] 20 Claims
 
1. A rigid polyurethane foam comprising the reaction product of a reaction mixture comprising:
(a) a polyisocyanate;
(b) a polyol composition comprising at least 30% by weight, based on the total weight of the polyol composition, of a polymer polyol having an OH number of greater than 260 mg KOH/g;
(c) a catalyst;
(d) a physical blowing agent composition comprising at least 50% by weight, based on the total weight of the physical blowing agent composition, of a hydrocarbon; and
(e) a carbon dioxide generating chemical blowing agent,
wherein the rigid polyurethane foam has a closed-cell content of more than 80%, measured according to ASTM D6226-15.