Clariant maintains a strong patent position in phosphinate based flame retardants and continues to take legal action against infringers

Muttenz, August 6, 2019 – Despite Clariant’s significant worldwide intellectual property (IP) position related to phosphinate flame retardant products, we are concerned that some polymer compounders and Original Equip-ment Manufacturers (OEMs) are considering local Chinese suppliers for diethylphosphinate alu-minium salt (DEPAL) based flame retardants. This class of halogen free flame retardants, often combined with nitrogen containing and inorganic synergists, have become workhorses in engi-neering thermoplastics, mainly glass filled polyamides and polyesters, but also epoxy resins. Clariant has been developing and advancing this technology for over two decades, so that our pa-tented Exolit® OP flame retardants have become the benchmark in quality and performance for phosphinate flame retardants in the market.

The current IP portfolio comprises 80 families with more than 500 individual patents or patent applications globally - they cover phosphinate-based flame retardants, related polymer compositions and polymer products such as e.g. plug connectors, circuit boards, encapsulating com-pounds, power plugs, LED housings, capacitor housings, charging cables for cell phones, and en-gine covers. Even though we have been challenged by individual Chinese competitors, relevant patent rights remain valid and in force in many jurisdictions, including countries such as China, Japan, Germany, France, and the United States. Clariant has never authorized other manufacturers to produce its patent-protected phosphinate flame retardant materials, neither in China nor in other countries. Clariant continues to take legal action against potential infringers anywhere in the world.

Given that many OEMs are operating worldwide in electronic technologies, we kindly remind them to internally check for potential IP risks from phosphinate flame retardants.

Please contact us at if you have any questions.


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Clariant International Ltd
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4132 Muttenz 1
+41 61 469 6742

Notes for editors

Clariant is a focused and innovative specialty chemical company, based in Muttenz near Basel/Switzerland. On 31 December 2018 the company employed a total workforce of 17 901. In the financial year 2018, Clariant recorded sales of CHF 6.623 billion for its continuing businesses. The company reports in four business areas: Care Chemicals, Catalysis, Natural Resources, and Plastics & Coatings. Clariant’s corporate strategy is based on five pillars: focus on innovation and R&D, add value with sustainability, reposition portfolio, intensify growth, and increase profitability.

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Clariant maintains a strong patent position in phosphinate based flame retardants and continues to take legal action against infringers. (Photo: Shutterstock)



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Stefanie NehlsenStefanie Nehlsen
Clariant International Ltd

+41 61 469 63 63

Caroline SchmidCaroline Schmid
Clariant International Ltd

+41 61 469 63 63

Siria NielsenSiria Nielsen

+31 164 317 036


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