Polyisobutenyl Succinimide (PIBSI) Dispersant
Polyisobutenyl succinimide (PIBSI) is the most widely used ashless dispersant in engine oil formulations, keeping soot, oxidation products, and carbonaceous deposits suspended in the oil and preventing sludge and varnish formation. The polyisobutenyl tail provides oil solubility while the succinimide head group strongly associates with polar contaminants. PIBSI is essential in every modern engine oil package from PCMO to HDEO, enabling extended drain intervals and clean engine operation.
Teknik Özellikler
| TBN | 10–30 mg KOH/g |
| appearance | Dark amber to dark brown viscous liquid |
| nitrogen content | 1.2–2.0 wt% |
| flash point (COC) | >180 °C |
| PIB molecular weight (Mn) | 950–2300 Da |
| kinematic viscosity (100°C) | 150–3000 mm²/s |
Uygulama Alanları
- Passenger car motor oil (PCMO) ashless dispersant for sludge and varnish control
- Heavy-duty diesel engine oil (HDEO) dispersant for soot and deposit control
- Automatic transmission fluids (ATF) for friction material and deposit compatibility
- Two-stroke engine oils for pre-dilution and air-cooled engine cleanliness
- Industrial circulating and gear oils requiring deposit prevention
Ürün Özellikleri
- Highly effective soot and sludge dispersancy prevents engine deposit buildup over long drain intervals
- Ashless formula does not contribute sulfated ash, phosphorus, or sulfur (low-SAPS compatible)
- Available in mono-, bis-, and poly-succinimide structures for optimized dispersancy and compatibility
- Post-treated (borated/maleated) grades available for enhanced dispersancy and friction performance
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