BASF develops new generation of Hydrolysis-resistant Polyesters

Hydrolysis Resistance PolyesterBASF has introduced a range of hydrolysis-resistant thermoplastic polyesters. Its Ultradur HR (HR= hydrolysis resistant) range of polyesters comprises a number of new products with special characteristics.

For example, Ultradur B4330 G6 HR High Speed, a particularly flowable and laser markable grade with 30% glass-fiber reinforcement, Ultradur B4330 G10 HR, a highly reinforced grade with 50% glass fibers as well as Ultradur B4331 G6 HR, the next generation with optimized processing characteristics. Ultradur B4331 G6 HR is coming up as uncolored grade, in a black laser markable version, and in orange for components in electric cars.

Having developed about a dozen HR-modified Ultradur grades, with 15%, 30% and 50% glass-fiber reinforcement, BASF has introduced flowable, impact-modified, laser markable, laser transparent or flame-retardant polyester. These products are found suitable primarily in automotive electronics, e.g. housings of control units, connectors, sensors, charging plugs, housings of battery stacks or connectors in the high-voltage circuit of electric cars.

BASF’s highly resistant PBT materials (PBT= polybutylene terephthalate) are especially suitable for use in challenging environments enabling a long service life and excellent operational reliability of automotive components.

The new Ultradur B4331 G6 HR grade offers considerably improved melt stability and flowability. Ultradur B4331 G6 HR shows no increase in viscosity even with long residence times and at high temperatures and is very suitable for stability and easy processing. The material can also be colored in orange (RAL 2003) to produce high-voltage plug-in connectors for electric cars. The plug-in connectors can be designed smaller and can withstand the higher voltages in electric vehicles due to the unusually high tracking resistance of PBT  resulting in savings on costs and component weight.

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