Polymethacrylate (PMA) Pour Point Depressant
Polymethacrylate (PMA) pour point depressants work by co-crystallizing with wax molecules in petroleum-derived base oils, disrupting the wax crystal network and preventing gelation at low temperatures. They enable formulation of engine oils and industrial lubricants with pour points as low as -45°C, meeting stringent cold-start performance requirements. PMA PPDs are effective across Group I, II, and III base oils and are compatible with OCP VI improvers in multi-grade formulations.
Technical Specifications
| appearance | Amber to dark amber liquid |
| active ingredient | 40–70 wt% in diluent |
| flash point (COC) | >175 °C |
| molecular weight (Mw) | 30,000–200,000 Da |
| treat rate in finished oil | 0.1–1.5 wt% |
| kinematic viscosity of concentrate (100°C) | 100–3000 mm²/s |
Applications
- Passenger car motor oils requiring cold cranking and pumping performance at low temperatures
- Industrial hydraulic and gear oils for cold-climate operation
- Diesel engine oils for arctic and winter service applications
- Automatic transmission fluids and power steering fluids
- Biodegradable ester-based lubricants for cold-climate outdoor equipment
Key Features
- Significantly reduces pour point of Group I-III mineral oil based lubricants by 20–40°C
- Different structural variants available tuned for specific wax crystal types in different base oils
- Compatible with OCP and HSD VI improvers without synergy penalties in multi-grade formulations
- Low treat rate (0.1–1.5%) delivers large performance improvement at minimal cost addition
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