公开(公告)号：US20240368333A1

公开(公告)日：2024-11-07

申请号：US18575873

申请日：2022-06-28

Applicant: Evonik Operations GmbH

Inventor： Roland HUBEL ,  Annegret Terheiden ,  Felix Mühlhaus

IPC: C08G18/18 ,  C08G18/08 ,  C08G18/20 ,  C08G18/24 ,  C08G18/50 ,  C08G101/00

Abstract: A process for producing polyurethane foams includes reacting at least one polyol component with at least one isocyanate component in the presence of one or more catalysts that catalyse the isocyanate-polyol and/or isocyanate-water and/or isocyanate trimerization reactions, at least one foam stabilizer and optionally one or more chemical or physical blowing agents. The polyol component includes recycled polyol.

公开(公告)号：US20240368331A1

公开(公告)日：2024-11-07

申请号：US18575864

申请日：2022-06-28

Applicant: Evonik Operations GmbH

Inventor： Roland HUBEL ,  Annegret Terheiden ,  Felix Mühlhaus

IPC: C08G18/18 ,  C08J9/00 ,  C08J9/02 ,  C08J11/14 ,  C08J11/16 ,  C08J11/18

Abstract: A process for producing PU foams can be performed by reacting at least one polyol component, which contains a recycled polyol, and at least one isocyanate component in the presence of one or more catalysts that catalyze the isocyanate-polyol and/or isocyanate-water and/or isocyanate trimerization reactions. The process also has at least one foam stabilizer and optionally one or more chemical or physical blowing agents. The employed recycled polyol has a total concentration of antioxidants of formula 3a and/or formula 1d of 0.001% to 10% by weight, preferably 0.002% to 8% by weight, further preferably 0.005% to 7.5% by weight, and particularly preferably 0.01% to 5% by weight, based on the total recycled polyol.