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About Us

Our Company

JSR BST Elastomer Co., Ltd (JBE) was established in 2011.

Tasked with operating safe and environmentally friendly products in the Petrochemical industry, JBE was created as a Japanese-Thai joint-venture between JSR Corporation (JSRC) and Bangkok Synthetic (BST). Also, JBE becomes the first S-SBR (Solution Polymerization Styrene-Butadiene Rubber) manufacturer in Thailand at a production capacity of 120,000 tons per year providing the specialty product which can be used as raw materials of fuel-efficient and high-performance tires.

Shareholder structure

JSR BST Elastomer Co., Ltd. was registered as a Thai limited company on 8th February, 2011., The Company’s current registered capital is 5,220 Million Baht with 51% Japanese shareholder (JSR Corporation or “JSR”) and 49% Thai shareholder (Bangkok Synthetics Co., Ltd. or “BST”).

was established in 1957 as a joint enterprise by the government and private sector, under the name of Japan Synthetic Rubber Co., Ltd.

In 1960, JSR commenced, with the completion of its Yokkaichi plant Japan’s first full scale domestic production of SBR and SBR lattices SB latex lines.

In 1969, the Company was fully privatized.

In 1997, the company has changed its name from Japan Synthetic Rubber Co., Ltd. to JSR Corporation.

Today there are four products domains include Elastomers and Plastics, Digital Solutions and most recently Life Sciences in JSR Corporation.

JSR supply high-quality products including the synthetic rubbers that were among the our first products, thermoplastic elastomers that have the characteristics of both rubber and plastic, and emulsions developed from technologies based on the polymerization of our synthetic rubbers and plastics. We also supply a wide range of functional materials, including industrial-use particles and battery materials.

In this area, JSR focuses primarily on ABS resins used for a wide range of purposes, including automobile parts, household appliances and building materials.

Using technologies cultivated through the development of polymer materials, JSR develops and supplies many products with top shares at the global level, including lithography materials, chemical mechanical planarization (CMP) materials and packaging materials, which are essential to the production of semiconductor chips. We also supply LCD materials and next-generation display materials for use in the production of LCD and organic EL flat panel displays. We also supply UV-curable resins used in 3D printing.

In this area, with the expanded range of global strategic partners from both inside and outside the JSR Group, we focus on materials targeting in-vitro diagnostics, research reagents and biopharmaceutical manufacturing.

For more detail, please click through JSR’s website:

Bangkok Synthetics Co., Ltd. (BST), established in 1991 as a pioneer in the C4 business in Thailand, is one of the region’s largest manufacturers of a variety of Mixed C4 products.
BST is building and strengthening the value chain from upstream to downstream in C4 based businesses with highly flexible factory design and efficient operations based on revolutionary technology. BST’s current products include Butadiene Monomer, Butene-1, MTBE, C4-Raffinate and by product-LPG.
In addition, BST also invested in (i) rubber production facilities for Emulsion Styrene-Butadiene Rubber (E-SBR), Polybutadiene Rubber (BR) and (ii) NB Latex Business, mainly for medical glove application, the Commercial NB Latex Plant was on stream in 2013.

For more detail, please click through BST’s website: