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SpectraSyn PAO 40-100

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Polyalphaolefins (PAO), 40 and 100 cSt

Description

ExxonMobil’s high viscosity SpectraSyn PAO products are hydrogenated olefin oligomers manufactured by the catalytic polymerization of linear alphaolefins. They have well-defined wax-free isoparaffinic structures that contain relatively unbranched side chains of predetermined chain length.

The high viscosity SpectraSyn PAO products feature numerous performance advantages compared to mineral oils and polyisobutenes. These advantages include better low temperature properties (pour point and viscosity), low volatility, and improved thermal stability. Because of their excellent response to antioxidant additives, SpectraSyn PAO products can be formulated to provide very high oxidation resistance. SpectraSyn PAO products also have high viscosity indices, which translate into improved flow at low temperatures and increased film thickness at high temperatures. In addition, high viscosity SpectraSyn PAO products are shear stable, hydrolytically stable, have good compatibility with mineral oils, and are frequently combined with other synthetic basestocks (e.g. esters or alkylated naphthalenes) to improve solvency and deposit control. All of these features make the high viscosity SpectraSyn PAO products attractive blend components for increasing basestock viscosity and upgrading basestock quality.

Applications

ExxonMobil’s high viscosity SpectraSyn PAO products provide superior lubrication as the basestocks for a variety of synthetic lubricants. They are particularly suited for industrial oils that require high stability under extreme operating conditions. In addition, the high viscosity SpectraSyn PAO products are frequently used in conjunction with lower viscosity fluids (PAO, mineral oils) as a viscosity booster to achieve a wide range of ISO VG industrial and automotive gear oils. Typical lubricants that incorporate the high viscosity SpectraSyn PAO include:

  • Fuel-efficient, extended-drain automotive gear and heavy duty transmission oils
  • High temperature industrial gear and circulating oils
  • Oils for higher efficiency/higher load rating worm gear boxes
  • Land-based gas turbine oils
  • Refrigeration compressor lubricants in severe service
  • Wide temperature range greases for industrial, aviation and automotive applications
  • Extreme pressure (EP) gear oils for enclosed and open gear applications
  • Industrial hydraulic fluids
  • Long-life air compressor oils

ExxonMobil’s SpectraSyn PAO products should also be considered for other applications where high-quality, high-purity hydrocarbons are required.

Synthetic lubricants formulated with the SpectraSyn PAO may offer the following benefits:

  • Extended drain intervals
  • Improved fuel economy/energy efficiency
  • Enhanced wear protection
  • Wide range of operating temperatures

SpectraSyn PAO products are registered worldwide, meet the FDA 21 CFR 178.3620(b) requirements for Technical White Oil, have USDA H1 approval for lubricants with incidental food contact, and are listed in the National Sanitation Foundation (NSF) White book.

Basics

SpectraSyn™ 40 100
Specific Gravity @ 15.6/15.6˚C0.8500.853
Kinematic Viscosity @ 100˚C, cSt39100
Kinematic Viscosity @ 40˚C, cSt3961240
Viscosity Index147170
Flash Point, Open Cup, ˚C281283
Pour Point, ˚C-36-30
Total Acid Number, mg KOH/g< 0.10< 0.10
Water, ppm< 50< 50

Appearance

SpectraSyn™ 40 100
Appearance Bright & Clear Bright & Clear
Color, APHA 10 60
Color, ASTM < 0.5 < 0.5
Refractive Index @ 25˚C1 1.4680 1.4715
Surface Tension @ 24˚C, Dynes/cm1 31.5 32.5

Flow

SpectraSyn™ 40 100
Brookfield Viscosity @ -26˚C, cP1 102,000 745,000
Kinematic Viscosity @ 0˚C, cSt1 4,840 25,100
Kinematic Viscosity @ -20˚C, cSt1 40,500 250,000

Thermal

SpectraSyn™ 40 100
Autoignition Temperature, ˚C1 396 415
Fire Point, ˚C1 318 330
Coefficient of Thermal Expansion, x E-4, g/cc -˚F1 3.36 3.32
Specific Heat @ 167˚F1 0.55 0.53
Thermal Conductivity, BTU/(hr-ft²-(˚F/ft))1 0.1005 (100˚F) 0.1030 (100˚F)
Evaporation Loss, 22h, 150˚C, Nitrogen1 0.4 0.3
Evaporation Loss, 6.5h, 205˚C, Nitrogen1 2.5 2.3
Vapor Pressure, mm Hg abs. 40 100
@ 200˚C 0.88 0.11
@ 250˚C 3.7 0.89
@ 300˚C 111.6 4.7

Solubility

SpectraSyn™ 40 100
Aniline Point, ˚C1 159.6 NE
Kauri-Butanol Value1 -20.6 -20.3
Molecular Weight by GPC1 1680 2830
Solubility Parameter @ 25˚C, (cal/cc)0.5, Calculated 8.30 8.33

Performance

SpectraSyn™ 40 100
Dielectric Constant1 2.15 2.15
Dielectric Strength, kv1 38.9 46.5
Copper Corrosion @ 130˚C, 3h1 1b 1b
Demulsibility @ 82˚C after 30 minutes1 No emulsion No emulsion
Foam, Seq. 1, mL/mL1 590/315 650/590

1 Single Sample Determination

Safety and Handling

For information on toxicology and safe handling of these products, refer to the Material Safety Data Sheets available on request.

Shipping Information

DOT Hazard Class: Not Regulated
DOT Hazard Labeling: None Required

Availability

ExxonMobil SpectraSyn PAO products are available in drums and in bulk. Samples are available upon request. Please call 1-800-682-8342 in the U.S., +32 2 722 3644 in Brussels, (65) 6885-8419 in Singapore or (81) 3-5425-9604 in Tokyo. Or visit our Web site at http://www.exxonmobilsynthetics.com

Updated July 2003