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Kepstan® PEKK, a new solution for extreme environments.
Kepstan® PEKK Monomers
Kepstan® PEKK (polyether-ketone-ketone) resins are a copolymer engineered by combining both terephthaloyl (Left) and isophthaloyl (Right) moieties.

Polymer Performance 

Kepstan® PEKK polymers are designed for applications requiring extreme performance:
Outstanding Continuous Use Temperature (CUT) 250-260°C 
•Excellent Mechanical Strength: Tensile, Compressive, Impact 
•Excellent inherent Flame Smoke and Toxicity (FST) properties
•Exceptional Chemical Resistance
•High Dielectric Strength at ambient and elevated temperatures
•Tremendous Barrier properties (CO2, H2S...etc.)
•Outstanding control of Wear-rate and Coefficient of Friction (COF)

Three Different Series of Grades

Series T/I Ratio Melt Temperature (°C) Glass Transition Temperature (°C) Crystallization Speed Typical Process
8000 80/20 358 165 Fast / Semi-Crystalline Injection
7000 70/30 332 162 Medium / Semi-Crystalline Composites
6000 60/40 305 160 Slow/Pseudo-amorphous 3D Printing
Powder Coating

Tailored Processibility

Unlike some other members of the PAEK (polyaryl-ether-ketone) polymer family, Arkema's Kepstan® PEKK polymers are highly customizable in terms of performance. Arkema achieves this customization or fine-tuning by carefully balancing the ratio of terephthalic ("T") and isophthalic ("I") monomers. Controlling this "T/I" ratio allows Arkema to produce grades with a range of crystallization rates and melt temperatures depending on the targeted method of final part production as well as the intended final use of the part itself.

Another dimension of polymer design is Arkema's tailored molecular weight control - allowing grades with highly specific melt volume indexes (from highly fluid to highly viscous).
These grades are then optionally filled with performance enhancing additives such as glass or carbon fibers, or carbon nanotubes.

The result is a portfolio of grades that may be extruded, 3D printed (selective laser sintering and fused filament fabrication), powder coated, injection molded, rotomolded, or impregnated in unidirectional composite tape fibers. Certain grades produced by certain processes may be even further optimized by careful choice of post-treatment or annealing conditions.

Amorphous or Semi-crystalline Kepstan® PEKK Powder Coatings

Kepstan® PEKK powder coatings can be coated in the amorphous state and left as-is, or annealed to the semi-crystalline state. Amorphous Kepstan® PEKK coatings retain higher flexibility, allowing for even better adhesion, especially for parts subjected to intense thermal cycling. Semi-crystalline coatings offer better temperature, chemical, and wear resistance. Contact us to discuss your coating application.


Global Supply

Kepstan® PEKK resins are manufactured in the USA and France. They are manufactured, marketed, and serviced as part of Arkema's High Perfomance Polymers business unit.