TY - GEN A1 - Belke, Martin A1 - Evtimova, Rozeta A1 - Langenstraßen, Rainer A1 - Pniok, Iris A1 - Peshkov, Vladimir A1 - Behrendt, Gerhard T1 - Closed Loop of Polyurethane Flexible Slabstock Foam Wastes by a Chemical Process T2 - Wissenschaftliche Beiträge 2004 N2 - 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. Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-3955 SN - 0949-8214 VL - 9 SP - 5 EP - 11 ER -