Highly Reactive Polyisobutylene - Market Share Analysis, Industry Trends & Statistics, Growth Forecasts (2026 - 2031)

According to Mordor Intelligence, the highly reactive polyisobutylene market size is projected to be USD 2.25 billion in 2025, USD 2.40 billion in 2026, and reach USD 3.33 billion by 2031, growing at a CAGR of 6.75% from 2026 to 2031.

This report is Segmented by Molecular Weight (Less Than 1, 000 G/Mol, 1, 000-2, 500 G/Mol, Greater Than 2, 500 G/Mol), Application (Adhesives, Lubricant Dispersants, and More), End-User Industry (Automotive and Transportation and More), Geography (Asia-Pacific, North America, Europe, South America, and Middle-East and Africa). The Market Forecasts are Provided in Terms of Value (USD).

Global Highly Reactive Polyisobutylene Market Trends and Insights

Rising Demand for Fuel and Lubricant Additives

According to a 2025 peer-reviewed study that combined density-functional theory with engine testing, polyisobutenyl succinimide (PIBSI) dispersants, containing 3.5-4.0% nitrogen, achieved a 98% suppression of low-speed pre-ignition and a 90% reduction in turbocharger deposits compared to metallic detergents. In Mack T-11 trials, the amine centers of the dispersants anchored to soot, while the hydrophobic PIB tails prevented agglomeration, ensuring viscosity rise remained below 20%. China and India bolstered this trend by imposing caps on sulfated ash at 0.5% and phosphorus at 0.08%, effectively sidelining the use of zinc dialkyldithiophosphate.

Surge in Adhesive and Sealant Consumption in EV Assembly

To prevent moisture ingress and contain thermal-runaway gases, electric-vehicle battery packs utilize 8-12 m of PIB-based butyl cord and 200-400 g of hot-melt sealant per unit. Henkel's LOCTITE RB EV 9740 cord and H.B. Fuller's EV SEAL 500 grade boast helium permeability below 10-1° cm3*cm/cm2*s*Pa and can withstand temperatures up to 150°C, surpassing acrylic counterparts in 1,000-hour cycling tests. With global EV assembly projected to exceed 20 million units by 2030, this translates to an additional PIB demand of up to 20,000 t/y.

Volatile Isobutylene Prices

In Q4 2025, isobutylene prices averaged USD 1,038 per ton in China, compared to USD 1,187 per ton in the United States, driven by differences in refinery run rates. Exxon Mobil Corporation and INEOS AG utilized their captive Fluid Catalytic Cracking (FCC) streams to sustain profit margins, while non-integrated Polyisobutylene (PIB) producers, dependent on merchant isobutylene purchases, reduced new plant investments due to margin pressures.

Other drivers and restraints analyzed in the detailed report include:

1. Accelerated Capacity Additions in Asia-Pacific
2. Emerging Role of HR-PIB as Binder in Solid-State Batteries
3. Stringent VOC and Carbon-Footprint Regulations

For complete list of drivers and restraints, kindly check the Table Of Contents.

Segment Analysis

Medium-molecular-weight grades accounted for 50.87% of the 2025 revenue, establishing them as key contributors in the reactive polyisobutylene market. Their application in pressure-sensitive adhesives and polyisobutylene succinic anhydride (PIBSA) dispersants ensures consistent demand from both packaging and lubricant sectors. High-molecular-weight grades (exceeding 2,500 g/mol) recorded a 6.63% compound annual growth rate (CAGR), gaining adoption in battery binders and cable flooding compounds that require viscosities above 300,000 centistokes (cSt) at 100 °C.

Southeast Asian cable manufacturers identify dielectric strength exceeding 20 kilovolts per millimeter (kV/mm) as a critical factor in transitioning from petroleum jelly to PIB-enriched flooding pastes, indicating a stable demand outlook. In contrast, low-molecular-weight PIB (below 1,000 g/mol) shows slower growth due to refinery alkylate economics, which diverts isobutylene into gasoline blending when octane spreads widen, limiting the availability of this specialty polymer.

Geography Analysis

Asia-Pacific, accounting for 47.03% of 2025's revenue, is growing at a 7.32% compound annual growth rate (CAGR). This growth is supported by China's efforts toward self-reliance in synthetic lubricants and the cost efficiencies achieved at Daelim's Yeosu site in South Korea. By 2031, the region's share in the highly reactive polyisobutylene market is expected to exceed 50%. This increase is driven by regional blenders raising polyisobutylene succinimide (PIBSI) inclusion rates in passenger-car oils to comply with China VI-B emission standards.

North America accounted for a significant portion of global consumption, supported by integrated value chains. Companies such as TPC Group, ExxonMobil, and INEOS direct fluid catalytic cracking (FCC)-sourced isobutylene into their proprietary polyisobutylene (PIB), polyisobutylene succinic anhydride (PIBSA), and detergent production facilities. In 2024, TPC Group expanded its diisobutylene capacity by 27%, positioning itself to supply low-global warming potential (GWP) refrigerant lubricants in compliance with the Kigali Amendment.

Europe contributed through key industry players. BASF's facilities in Ludwigshafen and Antwerp focus on medium-molecular-weight grades, which are used in low-sulfated ash, phosphorus, and sulfur (low-SAPS) engine-oil packages for Euro-7 test fleets. Although strict volatile organic compound (VOC) limits have reduced construction sealant volumes, demand for breathable membranes in net-zero buildings has supported specialty polyisobutylene (PIB) consumption. South America and the Middle East-Africa, together accounting for less than 5%, may see growth following the 2027 start-up of Saudi Arabia's USD 11 billion Amiral petrochemical complex, which integrates isobutylene extraction with specialty polymer production.

1. BASF
2. Braskem
3. Chemex Chemicals
4. Chevron Oronite Company LLC
5. China Petroleum & Chemical Corporation
6. Daelim Co., Ltd.
7. ExxonMobil Chemical
8. INEOS AG
9. Infineum International Limited
10. Janex S.A.
11. Kothari Petrochemicals Limited
12. KZJ New Materials Group Co., Ltd.
13. Lubrizol
14. LyondellBasell Industries Holdings B.V.
15. RB Products, Inc.
16. Shandong Orient Hongye Chemical Co., Ltd.
17. TPC Group

Additional Benefits:

• The market estimate (ME) sheet in Excel format
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