Polyisobutylene Succinimide (PIBSI) is an ashless dispersant widely utilized in modern lubricant formulations. Derived from highly reactive polyisobutylene (Mn=1000) and succinic anhydride, PIBSI is chlorine-free and designed to meet the performance demands of diesel and gasoline engines, as well as marine applications.

Key Features and Benefits

1. Effective Detergency and Dispersancy

   • Prevention of Deposits: Inhibits the formation of carbon deposits and film on pistons, rings, and valves.
   • Suspension of Contaminants: Keeps insoluble particles, such as soot and oxidation by-products, suspended in the oil.

2. Environmentally Friendly

   • Chlorine-free formulation, suitable for blending eco-friendly engine oils.

3. Engine Cleanliness and Longevity

   • Restores cleanliness by removing existing deposits, optimizing performance and reducing wear.
   • Improves fuel efficiency and reduces emissions.

4. Extended Oil Life

   • Maintains oil cleanliness, prolonging lubricant effectiveness and extending drain intervals.

5. Compatibility with Other Additives

   • Works synergistically with antioxidants, anti-wear agents, viscosity index improvers, and other additives for comprehensive lubricant performance.

Applications

PIBSI is versatile and is used for blending:

• Medium and High-Grade Diesel Engine Oils
• Medium and High-Grade Gasoline Engine Oils
• Marine Cylinder Oils: Particularly for low-speed crosshead engines.
• Environmentally Friendly Engine Oils

Functions of PIBSI

1. Suspending Contaminants

   • Its dual-solubility structure allows it to attach to dirt, sludge, and soot while keeping these contaminants dispersed in the oil.

2. Preventing Agglomeration

   • Prevents contaminants from clumping and forming harmful deposits.

3. Enhancing Oil Flow

   • Disperses contaminants throughout the oil, maintaining lubricant consistency and flow.

Performance Benefits

• Engine Cleanliness: Prevents sludge buildup and carbon deposits.
• Reduced Wear: Cleaner oil reduces abrasive wear on engine components.
• Friction Reduction: Improves lubrication and may lead to enhanced fuel efficiency.
• Extended Equipment Life: Keeps engines and machinery running efficiently over longer periods.

Customization of PIBSI Dispersants

Different PIBSI dispersants can be tailored for specific applications based on variations in:

1. Solubility: To optimize effectiveness in various base oils.
2. Dispersing Power: Enhances the ability to manage diverse contaminants.
3. Shear Stability: Ensures durability and performance under high shear conditions.