# Kumho Mitsui Chemicals to expand MDI production by 100,000 tons

Kumho Mitsui Chemicals received final approval for a 140 billion won debottlenecking investment to add 100,000 tons of MDI production capacity, raising total capacity to 710,000 tons by end of 2026.

- Type: Expansion
- Announced: 2025-12-15
- Where: Yeosu, South Korea
- Value: $100.0M (140.0B KRW)
- Starts operating: May 2027
- Status: announced
- Capacity: 100,000 tons per year (additional); total 710,000 tons per year
- Products: methylene diphenyl diisocyanate (MDI)
- Sectors: [Specialty Chemicals](https://endata.com/sectors/specialty-chemicals.md)

## Companies

- [Kumho Mitsui Chemicals Corp.](https://endata.com/companies/26031.md)
- [Mitsui Chemicals](https://endata.com/companies/19809.md) (partner)
- [Kumho Petrochemical](https://endata.com/companies/45104.md) (partner)

## Sources

- [asiae.co.kr](https://www.asiae.co.kr/en/article/2025121514393355247), 2025-12-15: "Kumho Mitsui Chemicals announced that it had received final approval at a shareholders' meeting on December 2 for a debottlenecking investment plan worth 140 billion won to add 100,000 tons of MDI production capacity."
- [echemi.com](https://www.echemi.com/cms/2747689.html), 2025-12-17: "This is a strategic project to maximize the use of existing equipment and improve investment efficiency."
- [european-rubber-journal.com](https://www.european-rubber-journal.com/article/2098553/kumho-mitsui-jv-to-increase-mdi-production-capacity), 2026-01-06: "Kumho Mitsui Chemicals is expanding the production of methylene diphenyl diisocyanate (MDI) in Yeosu, in the southern coast of South Korea."

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.