US 11,053,340 B2
HCFO-containing isocyanate-reactive compositions, related foam-forming compositions and PUR-PIR foams
Brandon W. Parks, McKees Rocks, PA (US)
Assigned to Covestro LLC, Pittsburgh, PA (US)
Filed by COVESTRO LLC, Pittsburgh, PA (US)
Filed on Mar. 8, 2019, as Appl. No. 16/296,872.
Prior Publication US 2020/0283561 A1, Sep. 10, 2020
Int. Cl. C08G 18/18 (2006.01); C08G 18/48 (2006.01); C08G 18/20 (2006.01); C08G 18/50 (2006.01); C08J 9/14 (2006.01)
CPC C08G 18/4804 (2013.01) [C08G 18/1875 (2013.01); C08G 18/2063 (2013.01); C08G 18/5024 (2013.01); C08G 2110/0025 (2021.01); C08J 9/143 (2013.01); C08J 2375/04 (2013.01)] 19 Claims
 
1. An isocyanate-reactive composition comprising:
(a) a polyol blend comprising:
(1) a saccharide-initiated polyether polyol having an OH number of from 200 to 600 mg KOH/g and a functionality of 4 to 6;
(2) an aromatic polyester polyol having an OH number of 150 to 410 mg KOH/g and a functionality of 1.5 to 3; and
(3) 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.