	US 12,344,723 B2
	Methods for reducing aldehyde emissions in polyether polyols and polyurethane foams
Haiying Li, Shanghai (CN); Shaoguang Feng, Shanghai (CN); Wenbin Bao, Shanghai (CN); Ping Zhang, Shanghai (CN); Jie Ji, Shanghai (CN); Jian Zou, Shanghai (CN); and Zhengming Tang, Shanghai (CN)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/638,259
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Aug. 30, 2019, PCT No. PCT/CN2019/103566 § 371(c)(1), (2) Date Feb. 25, 2022, PCT Pub. No. WO2021/035662, PCT Pub. Date Mar. 4, 2021.
Prior Publication US 2022/0363856 A1, Nov. 17, 2022
Int. Cl. C08J 9/12 (2006.01); C08G 18/48 (2006.01); C08G 18/50 (2006.01); C08G 65/333 (2006.01)

CPC C08J 9/125 (2013.01) [C08G 18/4829 (2013.01); C08G 18/5069 (2013.01); C08G 65/33396 (2013.01); C08G 2110/0083 (2021.01); C08J 2201/022 (2013.01); C08J 2203/10 (2013.01); C08J 2375/08 (2013.01)]

2 Claims

1. A process for producing a polyurethane foam comprising forming a reaction mixture that contains an aromatic polyisocyanate, at least one isocyanate-reactive material having an average functionality of at least 2 and an equivalent weight of at least 200 grams per mole of isocyanate-reactive groups, at least one blowing agent, at least one surfactant and at least one catalyst, and curing the reaction mixture in the presence of at least one 3-oxopropanamide compound, to form the polyurethane foam, wherein the 3-oxopropanamide compound is a compound represented by the structure:

wherein R¹is phenyl or alkyl having up to 6 carbon atoms, R²is hydrogen, R³is 2-hydroxyethyl or 2-hydroxypropyl and n is 1.