Materials Science

Clariant launches medical polymer compounds resistant to hydrolytic degradation

11th February 2020

Over the same period, the modified MEVOPUR compound showed almost no change. The observed difference was even greater during testing when tungsten-carbide-filled materials were used.

When the same materials were molded into tensile-test bars and measured for tensile strength and elongation, the unmodified samples saw reduction of 20 to 25% in these critical properties over the 26-week test period, while the MEVOPUR samples remained near 100%. In further mechanical- properties testing, the difference in results for tungsten-carbide-filled materials was much more pronounced.

“The final quality and reliability of catheter components relies on the stability and predictability of polymer material properties over a wide range of conditions,” Duckworth says. “Our testing on the new MEVOPUR radiopaque compounds shows the risk of polymer degradation from hydrolysis can be significantly reduced so predictability can be restored. This also demonstrates the importance of long-term collaboration between the device manufacturer and a materials supplier like Clariant.

Clariant manufactures MEVOPUR concentrates and compounds at its EN:ISO13485-2016 certified facility in Lewiston Maine, part of a global network of ISO13485 facilities that also includes sites in Europe and Asia. The dedicated expertise of the Clariant’s Healthcare Polymer Solutions team has developed products from PE to PEEK using USP Class VI, ISO10993 pre-tested ingredients. The MEVOPUR portfolio has included PEBA, TPU, PA12, along with various radiopaque fillers, for more than 10 years. Fluoropolymers were recently added to the portfolio.