Overview
This category covers specialty additive intermediates and synthetic base stocks that support lubricant formulation beyond the core additive chemistries. Polyisobutylene succinic anhydride (PIBSA) is the key intermediate for manufacturing ashless succinimide dispersants, reacting with amines to form the succinimide structure. Two molecular weight grades are available, Mn=1000 and Mn=1300, providing different dispersancy and viscosity characteristics in the finished dispersant. Synthetic polyol esters are Group V base stocks used in fire-resistant hydraulic fluids (HFDU classification), high-performance turbine oils, and specialty applications requiring high flash point, high VI, and excellent lubrication. They are biodegradable and offer outstanding thermal and oxidative stability.
PIBSA (Polyisobutylene Succinic Anhydride)
PIBSA is the acylating agent used to synthesize PIB succinimide dispersants by reacting with polyamines. The molecular weight of the PIB feedstock (Mn=1000 or Mn=1300) determines the dispersant's molecular weight and performance characteristics.
| Chemistry | Saponification Value (mgKOH/g) | Use |
|---|---|---|
| Polyisobutylene Succinic Anhydride (Mn=1000) | ≥100 | Dispersant synthesis intermediate |
| Polyisobutylene Succinic Anhydride (Mn=1300) | ≥80 | Dispersant synthesis intermediate |
Synthetic Polyol Esters
| Chemistry | VI | Flash Point (°C) |
|---|---|---|
| Trimethylolpropane Ester | ≥130 | ≥240 |
| Neopentyl Glycol Dioleate | ≥180 | ≥270 |
| Trimethylolpropane Trioleate | ≥180 | ≥300 |
| Pentaerythritol Tetraoleate | ≥180 | ≥300 |