Back to results
US 12,264,216 B2Granted
Polyurethane aerogels
AssigneeRAMPF Advanced Polymers GmbH & Co. KG
InventorsGerd-Sebastian Beyerlein, Annabelle Krauß, Michael Kugler
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for preparing a polyurethane foam, in particular an aerogel, from at least one polyisocyanate and at least one optionally recycled polyol, and to the use thereof.
Claims19
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.
2 more elements
A polyurethane foam obtained by a method 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 200,000millipascal-seconds (mPas), measured according to DIN 53019 at 25 degrees Celsius (°° 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.
2 more elements
Dependencies are inferred from the claim text.