Overview
Polyalphaolefin (PAO) is a synthetic lubricant base stock derived from the polymerization of alpha-olefins, typically decene. It is a cornerstone of high-performance lubricants due to its uniform molecular structure and absence of impurities found in mineral oils. PAO is classified as a Group IV base oil under the API categorization, offering superior properties such as thermal stability, shear resistance, and compatibility with additives. Its synthetic nature allows for precise control over viscosity and performance characteristics.
Physical and Chemical Properties
PAO exhibits a high viscosity index (VI) of 120-150, ensuring minimal viscosity change across temperature ranges. Its low pour point (-60°C to -40°C) makes it ideal for cold climates, while its flash point exceeds 200°C, enhancing safety in high-temperature applications. Chemically, PAO is inert and resistant to oxidation, reducing sludge formation and extending equipment life. Its non-polar structure provides excellent hydrolytic stability, preventing water-induced degradation.
Main Applications
PAO is predominantly used in automotive and industrial lubricants, including engine oils, gear oils, and hydraulic fluids. Its thermal stability suits high-performance engines and turbines, while its low volatility minimizes oil consumption. In aerospace, PAO-based greases are favored for their wide operational temperature range. It also serves as a base for compressor oils, metalworking fluids, and specialty greases requiring long service intervals.
Safety and Storage
PAO is generally safe but requires standard chemical handling practices. Use gloves and eye protection to prevent skin contact, and ensure adequate ventilation in confined spaces. Store in tightly sealed containers to avoid moisture absorption. Dispose of used PAO according to local regulations, as it may contain additives or contaminants. Bulk storage tanks should be nitrogen-purged to prevent oxidation during long-term storage.
B2B Procurement Guide
When procuring PAO, specify viscosity grade (e.g., PAO 4, PAO 6, PAO 8) based on application requirements. Verify thermal and oxidative stability data, especially for high-temperature uses. Inquire about additive compatibility if blending is intended. For cost-effectiveness, consider bulk purchases from reputable suppliers with ISO certification. Request technical datasheets and batch-specific analysis reports to ensure consistency. Spot-check shipments for clarity and viscosity verification.
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