Description
ExxonMobil’s Esterex™ esters are API category Group V fluids. Esterex™ Adipate Esters are produced by the reaction of mono-alcohols with adipic acid. These esters have excellent low-temperature properties, high viscosity indices, good lubricating properties and lower volatilities than mineral oils with comparable viscosities. In addition, the high polarity of the Esterex™ Adipate Esters makes them effective solvents that provide lubricant additive solubility and lubricant system cleanliness.
Applications
Esterex™ Adipate Esters can be used as either sole basestocks or as blendstocks with other synthetic fluids in many automotive and industrial lubricant applications. When used as primary basestocks, these esters are ideal in high-temperature conditions, such as reciprocating air compressors, where discharge valve cleanliness is required. When used as blendstocks with polyalphaolefins, Esterex™ Adipate Esters also provide excellent additive solubility in engine oil and industrial oil applications. Typical lubricants that incorporate Esterex™ Adipate Esters can include:
- Compressor oils
- Engine oils
- High-temperature greases
- Mist lubrication systems
Basics
| Esterex™ |
A32 |
A34 |
A41 |
A51 |
| Specific Gravity @15.6/15.6°C |
0.928c |
0.922c |
0.921 |
0.915 |
| Water, ppm |
< 500 |
< 1000 |
< 500 |
< 350 |
| Total Acid Number (TAN), mg KOH/g |
< 0.08 |
< 0.08 |
0.01 |
0.02 |
| Refractive Index @ 25.0°Ca |
1.4465 |
1.4487 |
1.4505 |
1.4559 |
Appearance
| Esterex™ |
A32 |
A34 |
A41 |
A51 |
| Appearance |
Bright & Clear |
Bright & Clear |
Bright & Clear |
Bright & Clear |
| Color, ASTM |
< 0.5 |
< 0.5 |
< 0.5 |
< 0.5 |
| Color, Saybolta |
> +30 |
+17 |
+11 |
+12 |
Flow
| Esterex™ |
A32 |
A34 |
A41 |
A51 |
| Kinematic Viscosity @ 100°C, mm²/s or cSt |
2.8 |
3.2 |
3.6 |
5.4 |
| Kinematic Viscosity @ 40°C, mm²/s or cSt |
9.5 |
12 |
14 |
27 |
| Kinematic Viscosity @ -40°C, mm²/s or cSta |
985 |
1,970 |
3,286 |
16,970 |
| Viscosity Index |
149 |
137 |
144 |
136 |
| Pour Point, °C |
-65 |
-60 |
-57 |
-57 |
| Surface Tension @ 24°C, mN/m or dynes/cma |
29.4 |
30.7 |
32.3 |
30.4 |
Thermal
| Esterex™ |
A32 |
A34 |
A41 |
A51 |
| Autoignition Temperature, °Ca |
360 |
360 |
381 |
375 |
| Flash Point, Open Cup, °C |
207 |
199 |
231 |
246 |
| Flash Point, Closed Cup, °Ca |
203 |
170 |
201 |
207 |
| Fire Point, °Ca |
238 |
248 |
249 |
280 |
| Noack Volatility, wt.% |
30.3 |
20.4 |
15.6 |
7.4 |
| Evaporation Loss 205°C for 6.5 hrs, wt.%a |
53.0 |
37.0 |
22.3 |
10.1 |
| Density Correction Factor, (g/cc)/°Ca |
7.56 × 10⁻⁴ |
7.33 × 10⁻⁴ |
7.18 × 10⁻⁴ |
7.02 × 10⁻⁴ |
| Thermal Conductivity @ 37.8°C, cal/sec(cm²)(°C/cm) or [BTU/hr(ft²)(°F/ft)]a |
3.40 × 10⁻⁴ [0.0823] |
3.20 × 10⁻⁴ [0.0725] |
3.65 × 10⁻⁴ [0.0884] |
3.30 × 10⁻⁴ [0.0799] |
| High Temperature Thermal Stability @ 204°C for 100 hrsa |
A32 |
A34 |
A41 |
A51 |
| Increase in viscosity, % |
4.9 |
2.0 |
2.0 |
3.5 |
| Change in TAN, mg KOH/g |
+ 3.41 |
+ 0.34 |
+ 0.37 |
+ 0.34 |
| Appearance after exposure |
Lt. sludge |
Yellow, no precipitate |
No precipitate |
No precipitate |
Solubility
| Esterex™ |
A32 |
A34 |
A41 |
A51 |
| Aniline Point, °Ca |
< 20.0 |
- 9.8 |
< 20.0 |
< 20.0 |
| Kauri-Butanol Value, (KB)a |
106.5 |
84.5 |
72.0 |
29.0 |
Performance
| Esterex™ |
A32 |
A34 |
A41 |
A51 |
| 4-Ball Wear, mm scar diametera |
0.69 |
0.67 |
0.73 |
0.68 |
| Demulsibility @ 54.4°C, mina |
5 |
5 |
5 |
5 |
| Foam Seq. 1, mL/mLa |
0/0 |
0/0 |
0/0 |
0/0 |
| Hydrolytic stability, TAN change mg KOH/ga |
+ 0.10 |
+ 0.11 |
+ 0.13 |
+ 0.16 |
| HPDSC, OIT iso @ 220°C with AOb, mina |
34 |
32 |
27 |
29 |
| RPVOT (Neat), mina |
315 |
--- |
415 |
265 |
| RPVOT with AOb mina |
> 1210 |
> 1210 |
> 1210 |
> 1210 |
| Oxidation and Corrosion with AOb @ 175°C for 72 hrsa |
|
| TAN increase, mg KOH/g |
2.7 |
1.8 |
1.4 |
--- |
| Increase in viscosity, % |
6.5 |
5.0 |
5.2 |
--- |
| Lead Corrosion wt. change, mg/in²a |
- 1.7 |
- 8.9 |
- 7.2 |
- 1.0 |
| Copper Corrosion @ 121°C for 3 hrsa |
1b |
1b |
1b |
1b |
| Biodegradation in 28 days, OECD 301F, %a |
70.2 |
78.5 |
76.5 |
58.5 |
ElastomerCompatibility Nitrilea
| Esterex™ |
A32 |
A34 |
A41 |
A51 |
| Volume change, % |
+ 41.3 |
+ 17.2 |
+ 23.5 |
+ 12.0 |
| Hardness change |
- 18 |
- 16 |
- 12 |
- 8 |
| Tensile strength change, % |
- 60.7 |
- 14.9 |
- 50.5 |
- 32 |
| Elongation change, % |
- 44.9 |
- 30.9 |
- 41.3 |
- 20.9 |
Flouroelastomera
| Esterex™ |
A32 |
A34 |
A41 |
A51 |
| Volume change, % |
+ 28.1 |
+ 8.6 |
+ 8.3 |
+ 3.4 |
| Hardness change |
- 18 |
- 7 |
- 4 |
- 2 |
| Tensile strength change, % |
- 42.4 |
- 22.0 |
- 6.6 |
- 3.1 |
| Elongation change, % |
- 6.7 |
- 2.4 |
- 9.1 |
- 9.1 |
Polyacrylatea
| Property |
A32 |
A34 |
A41 |
A51 |
| Volume change, % |
+ 72.8 |
+ 42.1 |
+ 42.7 |
+ 19.8 |
| Hardness change |
- 23 |
- 24 |
- 17 |
- 8 |
| Tensile strength change, % |
- 55.0 |
- 45.0 |
- 38.3 |
- 19.9 |
| Elongation change, % |
- 22.4 |
- 22.5 |
- 22.0 |
- 12.0 |
a Single sample or two sample average determinations
b 1 wt.% diphenylamines and phenyl naphthylamine antioxidant (AO) added
c Specific Gravity @ 20.0/20.0°C
Safety and Handling
For information on toxicology and safe handling of these products refer to the Material Safety Data Sheets, available on request or visit our Web site at http://www.exxonmobilsynthetics.com.
Shipping Information
DOT Hazard Class: Not Regulated.
DOT Hazard Labeling: None Required
Availability
ExxonMobil Esterex™ products are available in drums and in bulk. Samples are available upon request. Please call 800.682.8342 in the United States; 32.2.722.36.50 in Brussels; 86.21.2407.5157 in Shanghai; 65.6885.8419 in Singapore; or 81.3.6713.4040 in Tokyo. Or visit our Web site at http://www.exxonmobilsynthetics.com.
©2007 Exxon Mobil Corporation. All rights reserved.
