US 12,134,676 B2
Rigid polyurethane foams suitable for use as panel insulation
Shawn G. Rider, Harrisville, PA (US); Brandon W. Parks, McKees Rocks, PA (US); and Carson C. Miller, Pittsburgh, PA (US)
Assigned to Covestro LLC, Pittsburgh, PA (US)
Appl. No. 17/607,208
Filed by Covestro LLC, Pittsburgh, PA (US)
PCT Filed Apr. 21, 2020, PCT No. PCT/US2020/029086
§ 371(c)(1), (2) Date Oct. 28, 2021,
PCT Pub. No. WO2020/223059, PCT Pub. Date Nov. 5, 2020.
Claims priority of provisional application 62/839,835, filed on Apr. 29, 2019.
Prior Publication US 2022/0220249 A1, Jul. 14, 2022
Int. Cl. B32B 15/04 (2006.01); B32B 5/18 (2006.01); B32B 15/20 (2006.01); B32B 27/06 (2006.01); B32B 27/20 (2006.01); C08G 18/20 (2006.01); C08G 18/48 (2006.01); C08G 18/50 (2006.01); C08G 18/76 (2006.01); C08J 9/00 (2006.01); C08J 9/14 (2006.01)
CPC C08G 18/7664 (2013.01) [B32B 5/18 (2013.01); B32B 15/046 (2013.01); B32B 15/20 (2013.01); B32B 27/065 (2013.01); B32B 27/20 (2013.01); C08G 18/2063 (2013.01); C08G 18/2081 (2013.01); C08G 18/4816 (2013.01); C08G 18/4829 (2013.01); C08G 18/5024 (2013.01); C08J 9/0028 (2013.01); C08J 9/144 (2013.01); B32B 2266/0278 (2013.01); B32B 2307/304 (2013.01); B32B 2605/08 (2013.01); C08G 2110/0025 (2021.01); C08J 2203/162 (2013.01); C08J 2205/10 (2013.01); C08J 2375/04 (2013.01); C08J 2375/08 (2013.01)] 20 Claims
 
1. An isocyanate-reactive composition comprising:
(a) a polyol blend comprising:
(1) 50 to 98% by weight, based on the total weight of the polyol blend, of a saccharide-initiated polyether polyol having an OH number of 200 to 600 mg KOH/g and a functionality of 4 to 6;
(2) 1 to 20% by weight, based on the total weight of the polyol blend, of an aliphatic amine-initiated polyether polyol having an OH number of 20 to 120 mg KOH/g and a functionality of 3 to 6; and
(3) 1 to 20% by weight, based on the total weight of the polyol blend, of an alkanolamine-initiated polyether polyol having an OH number of at least 500 mg KOH/g and a functionality of 2.5 to 4;
(b) a blowing agent composition comprising:
(1) a hydrochlorofluoroolefin; and
(2) a carbon dioxide generating chemical blowing agent; and
(c) a tertiary amine catalyst composition.