US 12,441,831 B2
Silicone-free foam stabilizers for producing polyurethane foams
Zeljko Tomovic, Lemfoerde (DE); Sabrina Kronig, Lemfoerde (DE); Klaus Moeller, Ludwigshafen (DE); Christian Hagen, Lemfoerde (DE); and Markus Susoff, Kassel (DE)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 17/262,132
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Jul. 17, 2019, PCT No. PCT/EP2019/069181
§ 371(c)(1), (2) Date Jan. 21, 2021,
PCT Pub. No. WO2020/020709, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. 18185412 (EP), filed on Jul. 25, 2018.
Prior Publication US 2021/0292468 A1, Sep. 23, 2021
Int. Cl. C08G 18/76 (2006.01); C08G 18/18 (2006.01); C08G 18/32 (2006.01); C08G 18/48 (2006.01); C08G 18/66 (2006.01); C08J 9/08 (2006.01); C08J 9/12 (2006.01); C08K 5/5415 (2006.01); C08L 75/08 (2006.01)
CPC C08G 18/7685 (2013.01) [C08G 18/1816 (2013.01); C08G 18/1825 (2013.01); C08G 18/1833 (2013.01); C08G 18/3206 (2013.01); C08G 18/3275 (2013.01); C08G 18/4812 (2013.01); C08G 18/4816 (2013.01); C08G 18/4854 (2013.01); C08G 18/6677 (2013.01); C08G 18/6688 (2013.01); C08G 18/7664 (2013.01); C08J 9/08 (2013.01); C08J 9/125 (2013.01); C08K 5/5415 (2013.01); C08L 75/08 (2013.01); C08G 2110/0008 (2021.01); C08G 2110/0058 (2021.01); C08G 2110/0083 (2021.01); C08J 2375/08 (2013.01)] 9 Claims
 
1. A process for producing a polyurethane foam comprising mixing
(a) polyisocyanate,
(b) polymeric compounds having isocyanate-reactive groups,
(c) silicone-free stabilizer,
(d) optionally chain extending and/or crosslinking agents,
(e) catalysts,
(f) blowing agents, and
(g) optionally auxiliaries and additives,
to afford a reaction mixture and reacting the reaction mixture to afford the polyurethane foam,
wherein the silicone-free stabilizer (c) is obtained by alkoxylation of a 2- to 8-functional starter molecule with alkylene oxides,
wherein 0% to 9% by weight of the employed alkylene oxides is ethylene oxide, 0% to 50% by weight of the employed alkylene oxides is 1,2-propylene oxide and at least 50% by weight of the employed alkylene oxides comprise at least 4 carbon atoms and the number-average molecular weight of the silicone-free stabilizer (c) is 500 to 20 000 g/mol,
wherein the proportion of the silicone-free foam stabilizer (c), based on the total weight of the compounds (b), (c), (d), (e), and (f), is 0.01% to 0.5% by weight, and
wherein the content of silicone-based foam stabilizer is less than 0.3% by weight based on the total weight of the compounds (b), (c), (d), (e), and (f).