US 12,077,630 B2
Methods for reducing aldehyde emissions in polyurethane foams
Zhengming Tang, Shanghai (CN); Hongliang Chen, Shanghai (CN); Jian Zou, Shanghai (CN); Shaoguang Feng, Shanghai (CN); Steven Zhang, Shanghai (CN); Degang Zhang, Shanghai (CN); and Ping Zhang, Shanghai (CN)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/262,726
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Aug. 2, 2018, PCT No. PCT/CN2018/098383
§ 371(c)(1), (2) Date Jan. 24, 2021,
PCT Pub. No. WO2020/024233, PCT Pub. Date Feb. 6, 2020.
Prior Publication US 2021/0163670 A1, Jun. 3, 2021
Int. Cl. C08G 18/32 (2006.01); C08G 18/48 (2006.01); C08G 18/63 (2006.01); C08G 18/66 (2006.01); C08G 18/76 (2006.01); C08J 9/12 (2006.01); C09J 9/00 (2006.01)
CPC C08G 18/7607 (2013.01) [C08G 18/3206 (2013.01); C08G 18/3278 (2013.01); C08G 18/4841 (2013.01); C08G 18/632 (2013.01); C08G 18/6688 (2013.01); C08J 9/125 (2013.01); C08G 2110/0083 (2021.01); C08J 2203/10 (2013.01); C08J 2375/08 (2013.01)] 4 Claims
 
1. A method 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 per isocyanate-reactive group, at least one blowing agent, at least one surfactant and at least one catalyst, and curing the reaction mixture in the presence of (i) 0.02 to 0.15 parts by weight per 100 parts by weight of the at least one isocyanate-reactive material of at least one acetoacetate ester or amide selected from the group consisting of trimethylolpropane triacetoacetate ester, trimethylolethane triacetoacetate ester, and

OG Complex Work Unit Chemistry
an amide compound having the structure (ii) 0.05 to 0.25 parts by weight per 100 parts by weight of the at least one isocyanate-reactive material of at least one aminoalcohol and/or alkylhydroxylamine selected from the group consisting of 1,1,1-tris (hydroxymethyl) methylamine and ethanolamine, and (iii) 0.1 to 1.5 parts by weight per 100 parts by weight of the at least one isocyanat-reactive material of a phenolic antioxidant to form the polyurethane foam.