https://www.avient.com/news/polyone-accentuates-what’s-possible-application-specific-materials-and-design-npe-2018
COMPTEK™ High Temperature Formulations: Eighteen months ago, PolyOne acquired COMPTEK (Diez, Germany), a specialist in formulations based on extreme-heat polymeric materials such as PEEK, PES, PEI, PPS, PSU and PPSU.
https://www.avient.com/news/new-non-pfas-mold-release-additive-avient-high-temperature-polymers-help-enhance-manufacturing-efficiency
Evoluscend™ additive is effective across a range of high-temperature polymers, including PPSU, PES, PSU, PEI, LCP, PPS, and PEEK.