THERMOSTABLE SEGMENTED POLYETHERESTER COPOLYMER COMPOSITION

摘要

The invention relates to a composition of a thermoplastic segmented polyetherester copolymer with a strongly improved thermooxidative stability, consisting of: 1) a segmented polyetherester copolymer derived from terephthalic acid or naphthalene dicarboxylic acid, or an ester thereof, alkylene diol, polypropylene oxide glycol, which contains ethylene oxide end groups, and optionally a branching agent; 2) an effective amount of a stabilizer combination containing at least: (2a) at least one thermooxidative stabilizer chosen from the group of phenolic antioxidants and (2b) at least one thermooxidative stabilizer chosen from the group of aromatic amines; 3) optionally other additives. The composition is particularly suitable for application at high ambient temperatures and for applications in which the product obtained from the composition must over a long period be able to withstand deformations of at least 50 % without fracturing and is in contact with metal.