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Lanxess Challenge: Reducing Discoloration of Polyamides Exposed to Air and High Temperatures

Posted April 18, 2019

This competition is looking for novel ideas for formulations or additives that stabilize the color of one of its formulated aliphatic polyamides, preventing discoloration under exposure to heat at air at temperatures higher than 150°C.

Image credit: MRousse via Wikimedia, CC-BY-SA-4.0

Image credit: MRousse via Wikimedia, CC-BY-SA-4.0

This is a Reduction-to-Practice Challenge that requires only the submission of written documentation from the Solver. The Seeker will perform the experimental reduction to practice and validation of proposed solutions in order to determine the award.


The Seeker produces various formulated materials based on polyamide 6 and polyamide 66 that are used for technical applications in temperature ranges above 150°C. Over time (after a few weeks), it is observed that the material’s original light color darkens towards a brownish black, and the Seeker’s studies suggest that such discoloration is due to oxidative processes at elevated temperatures. The Seeker has attempted to solve this problem by testing a number of commercially available additives in its formulation (anti-oxidants, etc.) but none was successful.

Hence, the Seeker is challenging Solvers to propose novel ideas for an additive or combination of additive products that can be used to stabilize its products. More details can be found in the Detailed Description section of the Challenge.

Challenge Deadline: Submissions to this Challenge must be received by 11:59 PM (US Eastern Time) on June 16, 2019.


The Seeker, Lanxess, is one of the leading suppliers for engineering plastics based on polyamide (Durethan®) and polybutylene terephthalate (Pocan®) with a strong setup to serve global markets especially in automotive- and electric/electronic-applications.

Source: InnoCentive

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