BASF – New colour-stable polyamide for electromobility

  • Portfolio expansion of colour-stable tailor-made engineering plastics for use in electric cars
  • Ultramid® A3U44G6 DC OR – the new flame-retardant PA66 type shines in bright orange

With Ultramid® A3U44G6 DC OR (PA66 – GF30 FR), BASF is expanding its portfolio of flame-retardant engineering plastics for the eMobility market. High technical requirements from the industry require innovative solutions based on PA66. In the case of already proven Ultradur® (PBT) products, colour stability can be largely guaranteed, especially in orange(RAL 2003) which is in high demand in the industry. Conventional polyamides, however, tend to strong colour fluctuations or yellowing during heat aging.


“High-voltage components are usually exposed to significant temperature fluctuations. This repeatedly leads to strong discoloration in conventional polyamides. Our newly developed type Ultramid® A3U44G6 DC OR closes the innovation gap in terms of colour stability and mechanical strength”, explains Tina Weller, Product Development BASF. For the first time, the new grade meets all the criteria of colour stability and heat aging resistance and thus also enables long-lasting color coding, which is safety-relevant in the sensitive area of high voltages. The color stability could be confirmed after 1.000h at up to 130°C in the test.

Strong electrical insulation and flame retardancy

In addition to the colour consistency, Ultramid® A3U44G6 DC OR with a CTI 600 is characterized by high electrical insulation. The use of tailor-made pigments while at the same time dispensing with halide-containing flame retardants also counteracts electro-corrosion, which was previously difficult to contain, especially in humid and warm environments.

“During development, we focused on the elimination of halides such as iodide and bromide, thus setting the course for a durable product without contact corrosion,” explains Michael Roth, Product Development BASF.

With a very low total halide content (less than 50ppm), the PA66 achieves fire protection class UL94 V0 at 0.4mm. Furthermore, the product is equipped with a special organic heat stabilization package to meet the technical market requirements.

Further information:

About BASF’s Performance Materials division

BASF’s Performance Materials division encompasses the entire materials’ know-how of BASF regarding innovative, customized plastics under one roof. Globally active in four major industry sectors – transportation, construction, industrial applications and consumer goods – the division has a strong portfolio of products and services combined with deep understanding of application-oriented system solutions. Key drivers of profitability and growth are our close collaboration with customers and a clear focus on solutions. Strong capabilities in R&D provide the basis to develop innovative products and applications. In 2020, the Performance Materials division achieved global sales of EUR 5.63 billion. More information online:   

About BASF at BASF, we create chemistry for a sustainable future. We combine economic success with environmental protection and social responsibility. More than 110000 employees in the BASF Group contribute to the success of our customers in nearly all sectors and almost every country in the world. Our portfolio is organised into six segments: Chemicals, Materials, Industrial Solutions, Surface Technologies, Nutrition & Care and Agricultural Solutions. BASF generated sales of EUR 59 billion in 2020. BASF shares are traded on the stock exchange in Frankfurt (BAS) and as American Depositary Receipts (BASFY) in the U.S. Further information at