About Us


Established in 1996, is a prominent producer of polypropylene compound resins in Southeast Asia. It operates as a joint venture between SCG Chemicals Public Company Limited, Mitsui Chemicals Inc, and Prime Polymer Co., Ltd. SCG Chemicals Company Limited is a leading integrated producer of petrochemical products in Thailand, while Mitsui Chemicals has earned a strong reputation as a global chemical company. Prime Polymer Co., Ltd., formed through the merger of Mitsui Chemicals and Idemitsu Kosan, aims to enhance the global expansion of polyolefin products.

Leveraging the extensive experience and renowned technological expertise of its partners, GSC has expanded its range of PP compound products to cater to the diverse needs of customers in the region. The company is committed to delivering high-quality production that adheres to global standards of excellence.

Headquartered in Bangkok, Thailand, GSC's manufacturing facility is situated in the Map Ta Phut Industrial Estate and RIL Industrial Estate, located in Rayong province to the east of Bangkok. GSC supplies polypropylene compound resins to renowned automotive and electrical appliance companies across the region, earning their trust through exceptional product offerings. Besides, our technical development team ready to serve customer needs with long experience in PP compound industry, GSC always collaborate with both car maker, part maker, etc. to develop new product to accelerate your  business success together.

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    Great Specialty of PP Compound Grand Siam Composites Co.,Ltd. (GSC),a major producer of polypropylene compound resins in Southeast Asia.


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