PAO = Polyalphaolefin, Polymerized alpha olefin, Olefin Polymers, Olefin Oligomers (a synthetic hydrocarbon)
PAO are gaining rapid acceptance as high-performance lubricants and functional fluids because they exhibit certain inherent and highly desirable characteristics. These favorable properties include:
- A wide operational temperature range
- Good viscometrics (high viscosity index)
- Thermal Stability
- Oxidative Stability
- Shear stability
- Low corrosivity
- Compatibility with mineral oils
- Compatibility with various materials of construction
- Low toxicity
The general manufacturing process used to form PAO is performed by combining a low molecular weight material, usually ethylene gas, into a specific olefin which is oligomerized into a lubricating oil material and then hydrogen stabilized. There are a variety of basic building block molecules used to form the finished lubricant, which are dependent on the range of requirements of the specific lubricant.
Seal compatibility is an important factor for any lubricant. Unlike mineral oils, PAO does not have a tendency to swell elastomeric materials.
Recent work has indicated that the proper choice of other performance additives may eliminate the need to employ esters. In a test of a PAO vs. a mineral oil for seal compatibility, four seal materials were studied: acrylate, silicone, nitrile and fluoroelastomer. The seals were evaluated at the end of the test for changes in tensile strength, elongation, volume (seal swell), and hardness. The PAO performance fell within the specification limits for all four elastomers. The mineral oil failed with silicone. Similar tests have been carried out with fully formulated part- and full-synthetic PAO oils. In all cases the fluids met the specifications.
Recent data shows that PAO-based fluids provide superior performance for the high-tech cars and trucks being built today. Today engines are smaller and more demanding and operate at higher RPM and under hood spaces is limited which causes increased operating temperatures. Both the thermal conductivity and heat capacity of PAO fluids are about 10% higher than values for comparable mineral oils. The net result is that PAO-lubricated equipment tends to run cooler.
KV UREATIC M-2/S is a blue grease with a PAO base oil. It has excellent lubrication properties for a wide temperature range, from -45 ºC to 180 ºC. A specially formulated additive package also allows it to offer excellent water resistance and good temperature capacity. NLGI grade 2. Ideal for use on bearings subjected to high rotation speeds where a weak torque resistance is required.
IKV UREATIC H-2/S is a beige grease with a PAO base oil. It has excellent lubrication properties for a wide temperature range, from -20 ºC to 150 ºC. A specially formulated additive package also allows it to offer excellent water resistance and good load resistance. NLGI grade 2. Ideal for use on bearings subjected to high rotation speeds where a weak torque resistance is required.
IKV KOMPLEX M-2/1STF is a white coloured grease with a PAO base oil. It has excellent lubrication properties for a wide temperature range, from -40 ºC to 150ºC. NLGI grade 2. Ideal for use on EPDM seals.
IKV ATOX M-1/S is a PAO for use in applications in the presence of water and under high loads with long operating periods.
BESLUX GEARSINT XP is a 100% PAO synthetic oil for gears. High viscosity index, excellent antiwear properties evidenced at FZG test, Micropitting, Fe8, etc.