Nafion Ion-Exchange Membrane (Chlor-Alkali)

Wilmington, Delaware-based specialty chemicals company (NYSE: CC); spun off from DuPont in 2015. Holds the FM-200 trademark for HFC-227ea (heptafluoropropane, GWP 3,220) clean fire suppression agent. Primary production: El Dorado, Arkansas (322 Southfield Cutoff Road, El Dorado AR 71730) — the key Chemours fluorochemicals plant; produces FM-200, pharmaceutical-grade HFC-227ea, and 1336E; also added HFO production unit at El Dorado in January 2022. Fayetteville, NC is a different Chemours site linked to GenX/PFAS contamination of Cape Fear River. Louisville, KY is linked to HFC-23 emissions controversy. In 2023, Chemours partnered with A-Gas to enable recycled FM-200R (UL-listed, FM-approved) as a response to tightening AIM Act supply limits. The AIM Act imposed 30% additional US HFC production cut in 2024 (on top of 10% in 2023) = 40% total reduction from 2022 levels — directly impacting Chemours' FM-200 output. Also produces Opteon refrigerants and Teflon products. Chemours is the largest Western producer of HFC-227ea by revenue market share.

Japanese glass and chemicals conglomerate (TSE: 5201, formerly Asahi Glass); world's largest EUV photomask blank supplier by revenue (~55-59% market share). EUV blank production via 100%-owned subsidiary AGC Electronics Co., Ltd. at Koriyama, Fukushima, Japan (production started January 2022; 30% capacity expansion January 2024; ¥40B+ sales target by 2025). Unrelated businesses in same parent: automotive glass (world #1 market share), architectural/float glass, pharmaceuticals and agrochemical active ingredients, life sciences. Same company that makes your car windshield also makes the blank every EUV photomask starts from.

Japan's leading battery separator film manufacturer (Hipore brand); ~25% global share. Only major wet-process separator plant in the Western Hemisphere (Concord, NC).

HK-listed Chinese PFSA (perfluorosulfonic acid) resin and membrane producer; China's leading domestic PFSA membrane manufacturer for chlor-alkali, desalination, and wastewater treatment. Products have higher tensile strength than recast Nafion but slightly lower oxidative stability — a cost-competitive alternative for the Chinese domestic chlor-alkali market. Not yet a significant exporter to Western regulated markets. Shandong Dongyue represents China's strategic intent to develop domestic PFSA membrane capability to reduce dependence on Chemours and AGC for its rapidly growing chlor-alkali and green hydrogen electrolyzer markets.