# Mitsui Chemicals, Idemitsu, and Sumitomo Chemical plan polyolefin integration

Mitsui Chemicals, Idemitsu Kosan, and Sumitomo Chemical signed an MOU to integrate Sumitomo's PP and LLDPE businesses into Prime Polymer, targeting annual cost savings of over 8 billion yen.

- Type: Partnership
- Announced: 2025-09-09
- Where: Japan
- Status: announced
- Products: polypropylene, linear low-density polyethylene
- Sectors: [Plastics and Polymers](https://endata.com/sectors/plastics-polymers.md)

## Companies

- [Idemitsu Kosan](https://endata.com/companies/19808.md)
- [Mitsui Chemicals](https://endata.com/companies/19809.md)
- [Sumitomo Chemical](https://endata.com/companies/20503.md)
- [Idemitsu Kosan](https://endata.com/companies/19808.md) (partner)
- [Mitsui Chemicals](https://endata.com/companies/19809.md) (partner)
- [Sumitomo Chemical](https://endata.com/companies/20503.md) (partner)
- [Prime Polymer](https://endata.com/companies/31997.md) (partner)

## Sources

- [chemxplore.com](https://chemxplore.com/news/mitsui-chemicals-idemitsu-kosan-and-sumitomo-chemical-enter-into-mou-on-integration-of-sumitomo-chemical-s-pp-and-lldpe-businesses-into-prime-polymer-aiming-to-strengthen-the-competitiveness-of-the-domestic-polyolefin-business), 2025-09-09: "Mitsui Chemicals, Idemitsu Kosan, and Sumitomo Chemical have signed a Memorandum of Understanding to integrate Sumitomo's polypropylene (PP) and linear low-density polyethylene (LLDPE) businesses into Prime Polymer."
- [quiminet.com](https://www.quiminet.com/noticias/mitsui-idemitsu-y-sumitomo-chemical-unen-negocio-de-poliolefinas-5143881.htm), 2025-10-08: "Las compañías japonesas Mitsui Chemicals, Idemitsu Kosan y Sumitomo Chemical anunciaron la firma de un memorando de entendimiento para fusionar sus operaciones en el negocio de poliolefinas."

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