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(BASF) -- The new Ultradur High Gloss
B4570 is one of the numerous new engineering resins from BASF making their
appearance at the trade fair FAKUMA 2011 being held in October in
Friedrichshafen, Germany. Compared to existing polybutylene terephthalate (PBT)
grades: for headlight bezels, this material offers not only high gloss. It is
specifically characterized by its extremely low outgassing at temperatures up to
160°C over an extended period of time. Like related resins in the Ultradur
family, the new material can be metallized without difficulty and is immediately
available in Europe and Asia.
When standard PBT grades that
outgas at high temperatures are used for reflectors or bezels of especially hot
headlights, fogging of the lens may result and reduce the light output of the
headlight. On the one hand, automobile headlights have now become design
elements with complex aesthetic forms. At the same time, the space in which the
headlight must fit has become smaller. Both effects can lead to rising
temperatures, which cause outgassing of the bezel material. The substances
released during outgassing condense on the clear headlight lens and cause
fogging. With the new Ultradur High Gloss, hardly any outgassing can be detected
even at very high temperatures.
The material expands the PBT product line for headlights from BASF, which
to date consisted of Ultradur B4520 for standard applications, Ultradur B4560
with optimized release characteristics and Ultradur S4090 with especially good
flow properties and a minimal tendency to warp.
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