Recovery of Green Polyols from Rigid Polyurethane Waste by Catalytic Depolymerization.

ABSTRACT: Polyurethane (PU) is one of the most versatile polymers available and can be found in an infinite number of formats ranging from rigid or flexible foams to elastomers. Currently, most Rigid PU Foam (RPUF) waste is landfilled, even though a small amount is mechanically recycled, in which the material is conditioned in size to a very fine powder, which is introduced as a filler. In this work, chemical recycling of two types of rigid PU foams is studied, the major difference being the aliphatic or aromatic nature of the isocyanate used in the synthesis. A solvolysis process is developed, a chemical depolymerization that breaks the chains by means of a chemical agent, a solvent, in the presence of a catalyst and under controlled process conditions. The glycolysis products are purified by vacuu

SUBMITTER: Miguel-Fernandez R 

PROVIDER: S-EPMC9319047 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature