Method for cleaving polyurethane products
AssigneeCovestro Deutschland AG
InventorsDirk Hinzmann, Verena Schiffer, Antje Wehlau, Lena Schaffert, Lukas Reisky
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for cleaving polyurethane products, having the steps of (A) providing a polyurethane product which is based on isocyanate components and a polyol component; (B) reacting the polyurethane product with a monofunctional araliphatic alcohol in the presence of an alcoholysis catalyst, thereby obtaining a product mixture containing a liquid polyol phase and a solid carbamate of an isocyanate of the isocyanate component and the monofunctional araliphatic alcohol; and (C) separating the carbamate from the product mixture, thereby leaving the liquid polyol phase.
Claims15
A process for cleavage of polyurethane products comprising:
- (A) providing a polyurethane product based on an isocyanate component and a polyol component;
- (B) reacting the polyurethane product with a monofunctional araliphatic alcohol in the presence of an alcoholysis catalyst to obtain a product mixture containing a liquid polyol phase and a solid carbamate of an isocyanate of the isocyanate component and of the monofunctional araliphatic alcohol;
- And
- (C) separating the carbamate from the product mixture, leaving behind the liquid polyol phase.
Dependencies are inferred from the claim text.