TY - GEN A1 - Evtimova, Rozeta A1 - Lozeva, Yordanka A1 - Schmidt, Karl-Heinz A1 - Wotzka, Michael A1 - Wagner, Peter A1 - Behrendt, Gerhard T1 - Polyester Polyols from Waste PET Bottles for Polyurethane Rigid Foams T2 - Wissenschaftliche Beiträge 2003 N2 - This paper describes a modified process to produce polyester polyols from PET wastes derived from the “bottle fraction residue” of the German Dual System (DSD) [11] employing a waste oligoester condensate of the polyesterification process with the addition of some glycols of longer chain and occasional modification with further dicarboxylic acids to produce polyester polyols of a broad range of properties which are further reacted to form polyurethane or polyisocyanurate rigid foams for insulation, construction materials, or coatings. Y1 - 2003 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-3795 SN - 0949-8214 VL - 8 SP - 19 EP - 25 ER -