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Newly developed PPA solutions are designed for high-voltage e-motor and inverter busbars and other demanding components in power electronics.

November 24, 2021

2 Min Read
PPA polymers in e-mobility applications
Image: Solvay

A new generation of Amodel polyphthalamide (PPA) materials from Solvay target high demands of performance and sustainability for advanced electrical and electronic applications in e-mobility.

In the Supreme range, Amodel PPA AE 9933 and AE 9950 have been designed for e-motor and inverter busbars operating at 800 volts and higher. They combine best-in-class comparative tracking index (CTI) ratings with high thermal cycle shock resistance from -40 to 150°C. They will also retain their CTI over time even after temporary exposure to peak temperatures above 150°C.

New halogen-free, flame-retardant Amodel Bios HFFR R1-133 and HFFR R1-145 meet with the growing trend of integrating the e-motor, power electronics, and gearbox into a single, consolidated electric drive system. With a CTI >600 volts, heat resistance >120°C, and excellent dimensional stability, these grades enable the design of highly compact systems using miniaturized components. Moreover, they provide UL94 V0 flammability ratings without the need for halogenated flame retardants. Besides addressing safety concerns in the event of uncontrolled thermal excursion, the halogen-free formulation also minimizes the risk of electronic corrosion.

In addition, Solvay is offering Amodel Bios AE R1-133, an electro-friendly grade specifically developed for surface-mounted data connectors that can be reflow soldered without blistering. Compared with standard PPA, the higher impact resistance and weld-line strength of the material allow designers to further reduce the wall thickness of connectors, saving up to 50% in footprint on the printed board and giving more space for other electronic devices.

“Amodel Supreme and Bios are garnering a high level of interest among designers of e-propulsion systems, including e-motors, power electronics, and electronic coolant pumps. Beyond adding value by improving the thermal and electrical performance of e-mobility components in these systems, the new additions to the Amodel polymers family are being more widely considered as manufacturers are seeking to meet ambitious sustainability targets,” states Brian Baleno, Head of Marketing, Automotive, at Solvay Specialty Polymers.

Amodel PPA Supreme is currently considered the highest performance thermal and electrical PPA on the market, while Amodel PPA Bios features a partially bio-based long-chain molecular structure with the highest glass transition temperature (Tg) as well as the lowest global warming potential (GWP) compared with incumbent bio-sourced long-chain PPAs.

Solvay has reduced the CO2 footprint of Amodel PPA by 305 since 2013 and uses 100% renewable energy in PPA production at its global manufacturing plant in Augusta, GA.

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