| 摘要 |
The invention relates to a polyester composition for use in mirror optic systems such as headlights for motor vehicles and reflector lamps comprising energy saving lamps, comprising a polybutylene terephthalate resin (PBT) and having a cyclic dimer content of less than 0.35 wt.%, relative to the weight of the PBT, and which composition further comprises a second polymer selected from the group consisting of polyethyleneglycol terephthalate (PET), PET copolymers, polybutylene naphthanate (PBN), PBN-copolymers, polytrimethylene terephthalate (PTT), PTT-copolymers, polyethyleneglycolnaphthanate (PEN), PEN-copolymers, polycyclohexanedimethylene terephthalate (PCT), PCT-copolymers, aromatic polycarbonates and aromatic polyester carbonates (APEC), in an amount of 1-40 wt.%, relative to the total weight of PBT and the second polymer. The invention also relates to a process for preparing the composition, use of the composition for making moulded parts and to a moulded part made of the composi tion. |
