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Wednesday, 11 July 2018

BASF develops new range of hydrolysis-resistant polyesters




BASF SE has further developed its range of hydrolysis-resistant thermoplastic polyesters, to meet the demand of the automotive industry for highly effective sensors.
The expanded range of Ultradur HR (HR= hydrolysis resistant) comprises Ultradur B4330 G6 HR High Speed, a particularly flowable and laser markable grade with 30 percent glass-fiber reinforcement, Ultradur B4330 G10 HR, a highly reinforced grade with 50 percent glass fibers as well as Ultradur B4331 G6 HR, the next generation with optimized processing characteristics. Ultradur B4331 G6 HR is available from now on as uncoloured grade, in a black laser markable version, and in orange for components in electric cars.
With its Ultradur HR grades, BASF offers highly resistant PBT materials (PBT= polybutylene terephthalate) which are especially suitable for use in challenging environments. They thus enable a long service life and an excellent operational reliability of automotive components. The HR grades also have a considerably increased resistance to alkaline media which trigger stress corrosion cracking.
This is also true of the new Ultradur B4331 G6 HR grade with considerably improved melt stability and flowability. In tests, Ultradur B4331 G6 HR does not display any increase in viscosity even with long residence times and at high temperatures - the best basis for stable and easy processing. The material can also be coloured in orange (RAL 2003) in order to produce high-voltage plug-in connectors for electric cars. Thanks to the unusually high tracking resistance for PBT, the plug-in connectors can be designed smaller and still withstand the higher voltages in electric vehicles.

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