US 12,269,916 B2
Production of PU foams
Isabelle Denise Wessely, Karlsruhe (DE); Annegret Terheiden, Alpen (DE); Rüdiger Landers, Essen (DE); Roland Hubel, Essen (DE); Wilfried Knott, Essen (DE); Dagmar Windbiel, Essen (DE); and Horst Dudzik, Essen (DE)
Assigned to Evonik Operations GmbH, Essen (DE)
Filed by Evonik Operations GmbH, Essen (DE)
Filed on Jan. 6, 2021, as Appl. No. 17/142,802.
Claims priority of application No. 20157313 (EP), filed on Feb. 14, 2020.
Prior Publication US 2021/0253780 A1, Aug. 19, 2021
Int. Cl. C08G 18/76 (2006.01); A47C 27/14 (2006.01); C08G 18/08 (2006.01); C08G 18/18 (2006.01); C08G 18/20 (2006.01); C08G 18/24 (2006.01); C08G 18/48 (2006.01); C08G 18/61 (2006.01); C08G 77/14 (2006.01); C08G 77/46 (2006.01); C08J 9/04 (2006.01); C08L 83/12 (2006.01); C08G 101/00 (2006.01)
CPC C08G 18/7621 (2013.01) [A47C 27/14 (2013.01); C08G 18/14 (2013.01); C08G 18/18 (2013.01); C08G 18/2063 (2013.01); C08G 18/244 (2013.01); C08G 18/48 (2013.01); C08G 18/4816 (2013.01); C08G 18/4829 (2013.01); C08G 18/4837 (2013.01); C08G 18/61 (2013.01); C08G 77/46 (2013.01); C08J 9/04 (2013.01); C08L 83/12 (2013.01); C08G 77/14 (2013.01); C08G 2101/00 (2013.01); C08G 2110/0008 (2021.01); C08G 2110/0083 (2021.01)] 20 Claims
 
1. A process for producing a polyurethane foam, the process comprising: reacting
(a) at least one polyol component with
(b) at least one isocyanate component in the presence of
(c) one or more catalysts that catalyse an isocyanate-polyol and/or isocyanate-water and/or isocyanate trimerization reactions, and
(d) optionally one or more chemical or physical blowing agents, with
(e) SiOC-linked, linear polydialkylsiloxane-polyoxyalkylene block copolymers having repeat (AB) units, wherein A is a polydialkylsiloxane block and B is a polyoxyalkylene block,
obtained through a reaction of polyether diols with equilibrated α,ω-diacetoxypolydialkylsiloxanes,
wherein a sufficient amount of the SiOC-linked, linear polydialkylsiloxane-polyoxyalkylene block copolymers having repeat (AB) units is added such that the proportion by mass of said component (e), based on the finished polyurethane foam is from 0.0001% to 10% by weight.