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Arkema introduces new copolymers for injection molding and extrusion

French chemical company Arkema has introduced a new high-performance thermoplastic material, Kepstan6000 polyetherketoneketone (PEKK) copolymer. Kepstan6000 series copolymers are members of the PAEK (polyaryletherketone) family that, due to its molecular structures, reportedly allows for control of crystallization, with greater adhesion for powder coatings in harsh conditions.

"These properties allow for lower processing temperatures and the ability to process the Kepstan 6000 series copolymers polymers as either amorphous or semi-crystalline structures, depending on processing technologies and cooling conditions," said Tim Spahr of Arkema's Corporate Research in North America. "They can be injection molded and extruded as an amorphous polymer without the need for quenching."

The Kepstan6000 series copolymers have a melt temperature of 305 degrees C (581 degrees F), the lowest of the PAEK material family. However, it has a glass transition temperature of 160 degrees C (320 degrees F), which is among the highest in the PAEK family.

The Kepstan 6000 series copolymers includes medium, high, and very high flow grades which allow for use in a broad range of processing technologies, including film/sheet extrusion, laser sintering, calendaring, thermoforming, injection molding, fiber impregnation, compression molding, rotomolding, powder coating, bonding and welding.

Application markets include oil and gas, automotive, and aerospace.

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