Best High Molecular Weight Polyisobutylene Manufacturers in China

High molecular weight polyisobutylene (HMW PIB) is a synthetic elastomer produced through cationic polymerization of isobutylene, exhibiting exceptional gas impermeability, UV resistance, ozone aging resistance, and low-temperature flexibility down to -50°C. With molecular weights exceeding 100,000, this rubbery material serves as a critical base polymer for tire inner liners, insulating glass sealants, roofing membranes, lubricant additives, transdermal patches, and chewing gum bases. As China's petrochemical industry scales toward specialty chemicals and integrated C4 value chains, domestic HMW PIB manufacturers have achieved global competitiveness through advanced polymerization technology, consistent molecular weight distribution control, and comprehensive application development services.

(In No Particular Order)

Established in July 2008 in Jiaxing Port District, Zhejiang Province, Zhejiang Cenway Materials Co., Ltd. is a new material enterprise integrating R&D, production, and sales, incubated by Tsinghua Industrial Development Research Institute. The company's PIB Business Division is responsible for market development, sales, and downstream application services of high molecular weight polyisobutylene (above 100,000) and medium molecular weight polyisobutylene (10,000–100,000). Cenway's HMW PIB product line includes six grades-HB-50, HB-80, HB-100, HB-200, HB-300, and HB-400-each engineered for specific applications such as lubricant additives, roofing membranes, insulation tape, sealants, adhesives, protective films, chewing gum bases, and wax modification. The company also produces medium molecular weight grades MB-10, MB-12, and MB-15 for sealant and film applications. Cenway operates a modern manufacturing facility with advanced polymerization and testing equipment, maintaining strict quality control and continuous innovation. The company serves global markets through dedicated business divisions covering North China, South China, APAC, EU/US, and food/pharmaceutical sectors, providing fast and efficient services to customers worldwide.

Sinopec's Yanshan facility operates one of China's largest integrated butadiene and isobutylene refining complexes, representing a major domestic PIB production base. The company has been expanding capacity to supply China's growing tire, adhesive, and lubricant additive industries, leveraging integrated feedstock advantages for cost-competitive production.

A newer Chinese entrant in the HMW PIB sector, Hongrui Petrochemical has established production capabilities to capture growing domestic demand for tire inner liners, construction sealants, and lubricant additives. The company benefits from Shandong Province's integrated petrochemical infrastructure and competitive feedstock access.

Another emerging Chinese producer expanding market position in the HMW PIB sector, Shunda New Material serves domestic adhesive, sealant, and automotive applications with competitive production costs and regional logistics advantages.

A joint venture between BASF and Sinopec in Nanjing, BASF-YPC produces conventional and highly reactive PIB grades for the Chinese and Asia-Pacific markets. The facility leverages BASF's proprietary technology and Sinopec's feedstock integration to serve lubricant additive, tire, and sealant manufacturers.

While headquartered in South Korea, Daelim operates significant PIB production capacity with strong presence in Chinese markets. The company's DL Chemical division produces 220 KTA of polybutene including conventional and highly reactive grades, supplying tire and additive industries across Asia.

Through its global operations, INEOS supplies Indopol brand HMW PIB products to Chinese automotive and construction sealant markets. The company's international production footprint provides supply continuity for demanding applications requiring consistent molecular weight distribution.

ExxonMobil supplies Vistanex brand HMW PIB to Chinese pharmaceutical, food-grade, and high-performance industrial markets. The company's global scale and backward integration provide structural cost advantages and reliable supply for regulated applications.

The dominant North American PIB producer serves Chinese markets through export channels, supplying broad molecular weight range products for automotive, lubricant, and construction applications. The company has invested in production reliability and expanded storage infrastructure.

Kuraray maintains a differentiated position in high-purity, specialty PIB grades for pharmaceutical and food-grade applications in China. The company competes on quality and regulatory compliance credentials rather than price, serving demanding transdermal patch and food packaging markets.