@misc{BelkeEvtimovaLangenstrassenetal.2004, author = {Belke, Martin and Evtimova, Rozeta and Langenstraßen, Rainer and Pniok, Iris and Peshkov, Vladimir and Behrendt, Gerhard}, title = {Closed Loop of Polyurethane Flexible Slabstock Foam Wastes by a Chemical Process}, series = {Wissenschaftliche Beitr{\"a}ge 2004}, volume = {9}, journal = {Wissenschaftliche Beitr{\"a}ge 2004}, issn = {0949-8214}, doi = {10.15771/0949-8214_2004_1_1}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-3955}, pages = {5 -- 11}, year = {2004}, abstract = {Presently, about 8 million metric tons of polyurethanes are produced in the world annually. During production of precursors, semi-finished products and final products about 5 to 10 \% of this amount is waste, i. e. an amount of about half a million tons. To this add the products after their life cycle. This is a large source of material which should not be given to landfills or incinerators but be used as secondary materials for the production of new polyurethanes.}, language = {en} }