	US 12,264,216 B2
	Polyurethane aerogels
Gerd-Sebastian Beyerlein, Metzingen (DE); Annabelle Krauß, Grafenberg (DE); and Michael Kugler, Pirmasens (DE)
Assigned to RAMPF Advanced Polymers GmbH & Co. KG, Grafenberg (DE)
Appl. No. 17/600,500
Filed by RAMPF Advanced Polymers GmbH & Co. KG, Grafenberg (DE)
PCT Filed Mar. 31, 2020, PCT No. PCT/EP2020/059049 § 371(c)(1), (2) Date Sep. 30, 2021, PCT Pub. No. WO2020/201253, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 10 2019 204 570.7 (DE), filed on Apr. 1, 2019.
Prior Publication US 2022/0162373 A1, May 26, 2022
Int. Cl. C08G 18/08 (2006.01); C08G 18/10 (2006.01); C08G 18/20 (2006.01); C08G 18/76 (2006.01); C08J 9/28 (2006.01); C08J 11/24 (2006.01); C08G 101/00 (2006.01)

CPC C08G 18/14 (2013.01) [C08G 18/10 (2013.01); C08G 18/2063 (2013.01); C08G 18/7671 (2013.01); C08J 9/286 (2013.01); C08J 11/24 (2013.01); C08G 2101/00 (2013.01); C08G 2110/0041 (2021.01); C08G 2110/0091 (2021.01); C08G 2330/00 (2013.01); C08J 2201/0502 (2013.01); C08J 2201/0542 (2013.01); C08J 2205/026 (2013.01); C08J 2205/042 (2013.01); C08J 2375/12 (2013.01)]

19 Claims

1. A method for producing a polyurethane (PU) foam, comprising:

obtaining a first mixture by mixing at least one polyol and at least one first solvent, wherein the at least one polyol is obtained by aminolysis or alcoholysis of plastics comprising monomers, said monomers comprising at least one polyol, and has a viscosity greater than 200,000 millipascal-seconds (mPas), measured according to DIN 53019 at 25 degrees Celsius (°0 C.);

adding at least one polyisocyanate to the first mixture to form a second mixture;

forming a gel from the second mixture; and

removing, at least partially, the at least one first solvent from the gel.