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Views: 0 Author: Site Editor Publish Time: 2026-04-24 Origin: Site
In industrial production, a high-performance additive can often achieve twice the result with half the effort—it can not only solve the application pain points of traditional materials but also empower product upgrading. Today, we will introduce an "all-round player" deeply rooted in the field of lubrication and surface activity—Polyisobutenyl Succinic Anhydride (abbreviated as PIBSA), and take you to understand its core value and wide applications.
PIBSA, full name Polyisobutenyl Succinic Anhydride, CAS No. 67762-77-0, also known as Polyisobutylene Succinic Anhydride, is an amber to reddish-brown viscous liquid synthesized by professional processes from high-reactivity polyisobutylene (molecular weight ≈ 1000) and maleic anhydride. Its unique molecular structure, with a lipophilic polyisobutylene long chain on one side and a highly reactive anhydride group on the other, endows it with excellent surface activity and chemical modification potential. It is not only the core raw material of the high-performance emulsifier T-2007A but also the preferred additive in many industrial fields.
The excellent performance of PIBSA is inseparable from precise and controllable synthesis processes. Currently, there are two mainstream synthesis methods, each with its own focus, which can adapt to the needs of different high-end industrial scenarios:
Under a high-temperature environment of 200-220℃, high-reactivity polyisobutylene reacts directly with maleic anhydride, and the synthesis can be completed within 10 hours. The product has a stable acid value (about 110mgKOH/g), making it the mainstream process for producing high-end lubricant dispersants.
With the participation of oxygen and segmented temperature control (100-250℃), the product substitution degree is > 1.2, which not only has no coking phenomenon but also greatly improves the purity, effectively ensuring the batch consistency of the product and making the application more stable.
It is worth noting that the precise control of reaction temperature and time directly affects the chromaticity, acid value and residual maleic anhydride content of PIBSA (which needs to be controlled below 50ppm). Strict process control ensures that the T-2007A type PIBSA always maintains stable quality, easily meeting the strict requirements of high-end industrial scenarios.
Compared with traditional emulsifiers, PIBSA has realized the trinity of "emulsification, environmental protection and efficiency enhancement" with its unique molecular design, perfectly solving the application problems of traditional products:
The anhydride group in PIBSA can react with alkanolamines such as triethanolamine to generate high-efficiency emulsifiers, which can form a stable oil-water interface. Its hard water resistance can reach 600ppm, far exceeding that of traditional sodium petroleum sulfonate (T702), completely solving the pain points of traditional emulsifiers such as easy saponification and high foaming rate in hard water, and greatly simplifying formula design.
PIBSA does not contain chlorine, nitrite or phenol, which is fully in line with the current development trend of green chemistry. At the same time, its highly branched structure has excellent resistance to biodegradation, which can effectively extend the service life of metalworking fluids, being both environmentally friendly and cost-effective.
It is not only an excellent emulsifier but also has multiple practical functions: outstanding lubricity, which can reduce the friction coefficient and adapt to precision processing of aluminum alloy, magnesium alloy, etc.; excellent rust resistance, 3% diluent can pass the 24-hour rust test of cast iron, and its performance is comparable to imported sodium sulfonate; wide compatibility, no precipitation when compounded with paraffinic base, naphthenic base oil, borate, amide additives, adapting to various industrial formulas.
With comprehensive performance advantages, PIBSA has penetrated into many industrial fields and become a key driving force for industrial chain upgrading. The specific application scenarios are as follows:
Application Scenarios | Core Functional Value | Typical Application Cases |
Lubricant Additives | As a detergent dispersant, it removes equipment carbon deposits, adjusts oil viscosity and extends equipment service life | Heavy-duty mining machinery, new energy vehicle electric drive systems |
Fuel Additives | Prevent the formation of deposits in the fuel system and improve fuel combustion efficiency | Gasoline detergent, diesel pour point depressant |
Industrial Cleaners | Stripping oil stains by surface activity and stabilizing system performance | Metalworking fluid, emulsified oil production, petrochemical equipment cleaning |
Polymer Modification | Improve the heat resistance and mechanical strength of materials such as plastics and rubber | Biodegradable material modification |
In addition, PIBSA is also a key intermediate for synthesizing ashless dispersants such as polyisobutenyl succinimide (e.g., T151/T155), which is widely used in gasoline and diesel engine oils. It can effectively inhibit the formation of engine carbon deposits and improve engine cleanliness.
Taking T-2007A type PIBSA as an example, the core indicators of the product comply with national standards and ASTM standards, with stable and reliable performance. The specific parameters are as follows:
Test Items | Index Requirements | Typical Value | Test Standard |
Appearance | Pale yellow viscous transparent liquid | Pale yellow viscous transparent liquid | GB/T 1884 |
Acid Value (mgKOH/g) | ≥105 | 116 | ASTM D664 |
Kinematic Viscosity (100℃, mm²/s) | ≥600 | 649.5 | GB/T 265 |
Flash Point (Open Cup, ℃) | ≥170 | 208 | GB/T 3536 |
In terms of packaging and storage, PIBSA provides a variety of specifications to meet different procurement and transportation needs:
-Packaging Specifications: 170kg, 180kg, 900kg iron drums
-Shelf Life: 24 months
-Storage Recommendations: Store in a sealed container, storage temperature ≤45℃ to avoid affecting product performance
With the rapid development of new energy vehicles, high-end equipment manufacturing, green chemical industry and other fields, the market demand for environmentally friendly and high-performance additives continues to rise. As a core additive with no chlorine, low impurities and multiple functions, PIBSA not only meets the performance requirements of industrial product upgrading but also conforms to the global environmental protection policy trend.
In the future, PIBSA will continue to develop in the direction of environmental protection and high performance, play a more important role in lubricants, metal processing, polymer material modification and other fields, and become a key material to help enterprises reduce costs and increase efficiency and improve product competitiveness.
Should you have any demand for this product, please contact zhou@sinobiochemistry.com to get our professional quotation and relevant information.
