Description
Product Introduction
Polyisobutylene Succinimide is an ashless dispersant prepared from highly reactive isobutylene (Mn=1000) . With good detergency and dispersancy, it can inhibit the formation of carbon deposit and film on the piston of engine. It doesn’t contain chlorine.
Features
Good detergency & dispersancy
Free of chlorine
Application
Used for blending medium and high grade diesel engine oils
Used for blending medium and high grade gasoline engine oils
Used for blending marine cylinder oils for low-speed crosshead engine
Particularly suitable for blending environment-friendly engine oils
Reference Dosage 2.0-4.0%
| Item | Typical Value | Test Method |
| Appearance | Thick Transparent Liquid | Visual |
| Density (20℃),kg/m³ | 890-950 | SH/T0604,ASTM D4052 |
| Kinematic Viscosity (100℃),mm²/s | Report | GB/T265,ASTM D445 |
| Flash Point(COC)℃ | ≥180 | GB/T3536,ASTM D92 |
| Nitrogen,m% | 1.1-1.3 | NB/SH/T0704,ASTM D5762 |
| TBN,mgKOH/g | 15.0-30.0 | SH/T0251,ASTM D2896 |
| Color Number | ≤4.0 | GB/T6540,ASTM D1500 |
| Water,m% | ≤0.08 | GB/T260,ASTM D95 |
| Mechanical lmpurities,% | ≤0.08 | GB/T511 |
- Our state-of-the-art research and development laboratory is equipped with cutting-edge analytical and testing instruments, ensuring the highest standards in lubricant additive innovation.
- Our laboratory, spanning over 1,500 square meters, features advanced tribology testing, rheological analysis, and thermal stability evaluation equipment to optimize lubricant formulations.
- We utilize Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA), and High-Performance Liquid Chromatography (HPLC) to ensure precise chemical composition and performance validation.

- Our modern production facility, covering 20,000 square meters, is equipped with automated blending lines and an annual production capacity of over 10,000 metric tons, ensuring stable and continuous additive supply.
- We maintain a robust global supply chain, with strategically located warehouses and logistics partners, guaranteeing on-time delivery to lubricant manufacturers worldwide.
- Our inventory management system allows for flexible order volumes, meeting the needs of both large-scale blending plants and specialized lubricant producers.
- Our additives comply with API, ILSAC, ACEA, and major OEM specifications, ensuring full compatibility with your lubricant formulations.
- Every batch undergoes strict quality control in our ISO 9001 and ISO 17025 certified laboratory, ensuring consistent performance and blending stability.
- We provide detailed COA (Certificate of Analysis), SDS (Safety Data Sheet), and TDS (Technical Data Sheet) for every shipment, ensuring traceability and regulatory compliance.
- We offer competitive pricing without compromising on quality, helping lubricant manufacturers reduce formulation costs while maintaining high performance.
- Our bulk supply discounts, flexible payment terms, and Just-in-Time (JIT) delivery options support your cost management and inventory planning.
- Whether you need full additive packages or single-component additives (detergents, dispersants, anti-wear agents, etc.), we provide customized procurement solutions.
- Our dedicated customer support and logistics team ensures fast order processing and real-time shipment tracking.
- We maintain buffer stock in key regions, minimizing supply chain disruptions and ensuring continuous production for your lubricant blending operations.
- With a responsive technical and sales team, we provide immediate assistance in product selection, formulation compatibility, and regulatory updates.
- We prioritize long-term partnerships, working closely with lubricant manufacturers to optimize product performance and cost efficiency.
- Our technical experts offer formulation guidance, helping procurement teams choose the best additive solutions for synthetic, semi-synthetic, and mineral-based lubricants.
- We provide market insights and industry trend analysis, ensuring our partners stay ahead in a competitive lubricant market.

Polyisobutylene succinimide is a type of oil-soluble dispersant used in lubricants and fuels. It is derived from polyisobutylene, a synthetic polymer, and succinic anhydride, an organic compound.
Polyisobutylene succinimide dispersants are used to prevent the formation of deposits and sludge in engines and machinery. They work by dispersing and keeping insoluble contaminants, such as soot, oxidation by-products, and wear debris, suspended in the oil. This prevents the contaminants from settling and forming deposits on critical engine surfaces, such as pistons, rings, and valves.
Furthermore, polyisobutylene succinimide dispersants also have detergency properties. They help to clean and remove existing deposits and sludge, restoring engine cleanliness and optimizing performance. This can lead to improved fuel efficiency, reduced emissions, and extended engine life.
Polyisobutylene succinimide dispersants are typically used in combination with other additives, such as antioxidants, anti-wear agents, and viscosity index improvers, to provide a comprehensive lubricant formulation. They are used in a wide range of lubricants, including engine oils, transmission fluids, hydraulic fluids, and gear oils.
Overall, polyisobutylene succinimide dispersants in lubricants help to maintain engine cleanliness, prevent the formation of deposits, and enhance overall lubricant performance. They contribute to the smooth operation and longevity of engines and machinery.
Function of PIBSI:
PIBSI acts as a dispersant in lubricating oils. Dispersants play a vital role in maintaining engine cleanliness by:
- Suspending contaminants: PIBSI molecules have a unique structure with both oil-soluble and water-soluble portions. This allows them to attach to dirt, sludge, soot, and other contaminants in the oil.
- Preventing agglomeration: By attaching to contaminants, PIBSI keeps them from clumping together and forming larger deposits.
- Dispersing throughout the oil: PIBSI keeps the contaminants suspended within the oil, preventing them from settling on engine components.
Benefits of PIBSI Dispersants:
- Improved Engine Cleanliness: PIBSI dispersants effectively keep the engine oil clean by suspending contaminants and preventing deposits.
- Reduced Wear: Clean oil minimizes wear on engine components by preventing abrasive contaminants from contacting metal surfaces.
- Extended Oil Life: By maintaining oil cleanliness and performance, PIBSI dispersants can help extend oil drain intervals.
- Friction Reduction: Cleaner engines with less friction can potentially experience some improvement in fuel efficiency.
Types of PIBSI Dispersants:
There are various types of PIBSI dispersants available, depending on the specific amine used in the reaction process. These variations can influence properties like:
- Solubility: The effectiveness of the dispersant in different base oils.
- Dispersing power: The ability of the dispersant to attach to and suspend a wide range of contaminants.
- Shear stability: The ability of the dispersant to maintain its effectiveness under high shear forces experienced in engines.











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