# Sumitomo Chemical and Prime Polymer finalize polyolefin integration plan

Sumitomo Chemical and Prime Polymer have finalized a contract to integrate Sumitomo's domestic PP and LLDPE businesses into Prime Polymer. The business merger will occur on 1 July 2026, with asset integration by 1 April 2027. Sumitomo will acquire a 20% stake in Prime Polymer.

- Type: Partnership
- Announced: 2024-03-25
- Where: Japan
- Status: announced
- Capacity: 1.59mn t/yr PP and 720,000 t/yr PE after integration
- Products: polypropylene (PP), linear low-density polyethylene (LLDPE)
- Sectors: [Plastics and Polymers](https://endata.com/sectors/plastics-polymers.md)

## Companies

- [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

- [argusmedia.com](https://www.argusmedia.com/en/news-and-insights/latest-market-news/2769560-japan-s-petchem-firms-finalise-polymer-integration-plan), 2024-03-25: "Demand for domestically produced polyolefins will continue to decline because of shrinking domestic demand, population decline and changing lifestyles."

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