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Industrial-scale recycling of slabstock foam residues into polyols

von Dr. Gupta Verlag

the German company H&S Anlagentechnik GmbH from Sulingen introduces to the PU market a new technology and reactor installations for the chemical conversion of flexible polyurethane foam production residues into polyols. the technology is based on an optimised acidolysis process and enables the generation of high quality recycled polyols on a commercial production scale. In comparison to previously known methods, the polyols generated under H&S technology have good reactivity and do not contain primary aromatic amines (MDA or TDA) which are hazardous and not acceptable for bedding and upholstery foams. Various grades of conventional foams without and with fillers such as calcium carbonate are suitable for this process. A technology to allow high resilience foam recycling is currently in development.