Core Functions of Polyisobutylene Succinimide

1. High-efficiency ashless dispersant for engine oilsThis is the most essential application of polyisobutylene succinimide. In engine oils, it can adsorb on the surface of harmful impurities such as oil sludge, carbon deposits, and metal wear particles generated during engine operation, dispersing these particles into the lubricating oil system in the form of stable colloids. It prevents these impurities from depositing on critical engine components like piston rings, cylinder walls, valve stems, and oil filters, thereby maintaining the cleanliness of the engine interior and ensuring smooth operation.
2. Detergent auxiliary and sludge inhibitorWhen compounded with metal-containing detergents such as calcium sulfonate and magnesium sulfonate, polyisobutylene succinimide can complement and enhance the overall cleaning performance of lubricants. It effectively inhibits the formation of high-temperature carbon deposits on piston tops and low-temperature sludge in crankcases, especially suitable for engines operating under harsh conditions such as frequent cold starts, long-term idling, and heavy loads.
3. Seal compatibility improverPolyisobutylene succinimide has a good compatibility with the elastomer seals used in engines, such as nitrile rubber and fluororubber. It can prevent the hardening, swelling, or cracking of seals caused by other additives, maintaining the sealing performance of the engine, reducing oil leakage risks, and extending the service life of seal components.
4. Additive for industrial lubricants and fuelsIn industrial lubricants such as gear oils and hydraulic oils, it acts as a dispersant to prevent the deposition of wear particles and oxidation products, improving the service life of the lubricants and equipment. In diesel and gasoline, it can be used as a fuel detergent to keep fuel injectors and carburetors clean, promoting more complete fuel combustion and reducing exhaust emissions.