PIB Poly-Succinimide
PIB poly-succinimide — a high-molecular-weight ashless dispersant delivering maximum dispersancy for the heaviest soot loads. The premier soot-handling dispersant for heavy-duty diesel oils.
The high-MW dispersant for the heaviest soot loads
Poly-succinimide dispersants use high-molecular-weight structures with multiple couplings to deliver the maximum dispersancy needed for the heavy soot loads of modern diesel engines.
PIB poly-succinimide is a high-molecular-weight ashless dispersant built with multiple succinimide couplings for maximum dispersancy. It is the premier dispersant for heavy-duty diesel engine oils, where exhaust gas recirculation (EGR) produces heavy soot that must be kept finely dispersed to prevent soot-induced viscosity increase, wear and deposits. Its high molecular weight and multiple anchoring points give it superior soot-carrying capacity, making it the defining soot-control additive of modern HDDO. It is part of the ashless dispersant family and central to diesel engine oil formulation.
PIB Poly-Succinimide — typical properties
Representative typical values for PIB poly-succinimide. Indicative only — exact values vary by grade and are confirmed on the TDS and batch COA.
| Property | Typical Value | Method / Note |
|---|---|---|
| Appearance | Brown viscous liquid | Visual |
| Total Base Number (TBN) | ~20–45 mg KOH/g | ASTM D2896 · grade-dependent |
| Nitrogen content | ~1.2–2.2 wt% | Polyamine couplings |
| Kinematic viscosity (100°C) | ~300–1000 mm²/s | ASTM D445 · high-MW |
| Flash point (COC) | > ~170 °C | ASTM D92 |
| Density (15°C) | ~0.9–0.95 g/cm³ | Typical |
| Structure | Poly-succinimide | High-MW, multiple couplings |
Typical values for guidance only — not a specification. Request the TDS for the specific grade you need; the COA reports actual measured values for your batch.
Where PIB poly-succinimide dispersant is used
Heavy-Duty Diesel Oils
Premier soot-control dispersant for HDDO with EGR. See diesel engine oil.
High-Soot Applications
Maximum dispersancy for the heaviest soot loads.
Long-Drain Diesel Oils
Maintains dispersancy over extended diesel drain intervals.
Detergent-Dispersant Systems
The high-MW soot-handling backbone of diesel additive packages.
Why formulators choose PIB poly-succinimide dispersant
Maximum soot dispersancy
High-MW structure with multiple couplings delivers superior soot-carrying capacity.
Prevents soot thickening
Keeps EGR soot finely dispersed, preventing the viscosity increase that fails diesel oils.
The HDDO soot-control core
The defining dispersant for heavy-duty diesel oil soot performance.
From sample drum to ISO tank
Sinolook supplies PIB poly-succinimide dispersant at any scale, from formulation samples to commercial bulk, to over 60 countries.
Frequently asked questions
What is PIB poly-succinimide used for?
Why do diesel oils need high-MW poly-succinimide?
How does poly-succinimide differ from bis-succinimide?
What is soot-induced viscosity increase?
Can Sinolook provide TDS, MSDS and COA?
Request PIB poly-succinimide dispersant from Sinolook
Tell us your target grade, application and volume — we'll send the TDS, a batch COA and a delivered quotation within 24 hours.
Request a Quote