Mobil COOLANOL™

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Mobil COOLANOL™ silicate ester synthetic dielectric heat transfer fluids are designed to meet the special needs of sensitive electronic components and environmental control systems in aircraft, missiles and spacecraft.

The proven quality and reliability of Mobil COOLANOL is an important additional safeguard against costly and potentially catastrophic failure of critical airborne electrical equipment.

Reasons to trust Mobil COOLANOL

  1. Superb high- and low-temperature stability
  2. Versatile and simple to handle
  3. Manufactured under stringent quality control
  4. Oxidative stability
  5. Radiation resistance
  6. Lubricity

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Features and benefits

COOLANOL is specifically intended for liquid circulating systems (dynamic liquid phase) found in high-density electronic packages in aerospace and military applications. Such systems are in wide use because of their excellent heat transfer efficiency. COOLANOL should not be used in vaporizing (boiling liquid) systems.

  • Superb High and Low Temperature Stability
  • Versatile and Simple to Handle
  • Manufactured under Stringent Quality Control
  • Oxidative Stability
  • Radiation Resistance
  • Lubricity

Applications

To select the proper COOLANOL fluid for a given application, first determine the upper and lower temperature parameters of the application.

  1. Coolanol 20:  (-101 - 149 °C / -150 – 300 °F)
  2. Coolanol  25R:  (-54 - 149 °C / -65 – 300 °F)

Specifications

MIL-C-47220B (May 1985) military specification, though inactive, distinguishes five fluid types. Fluid IV represents products from the family of COOLANOL fluids, as shown in Table 1.

Table 1  

MIL-C-47220B Fluid Type
Applicable Fluid
Type IV COOLANOL 25R

Certain COOLANOL fluids relate to military contractor specifications as shown in Table 2

Table 2  

OEM Specifications
Applicable Fluids
Boeing (McDonnell-Douglas)  
MMS-652, Rev A COOLANOL 25R
Grumman GM 6003A, Amendment-No 1  
Type I COOLANOL 25R
Hughes Aircraft HMS 20-1458 Rev E COOLANOL 25R
Northrop MS-138, Rev A COOLANOL 25R

Technical details

TYPICAL PHYSICAL AND CHEMICAL PROPERTIES*
Mobil COOLANOL Dielectric Heat Transfer Fluids

Property (Test Method), Units
COOLANOL 20
COOLANOL 25R

Material Safety Data Sheet

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Fluid Operating Temperature Range per MIL-C-47220B None applies
Type IV
Appearance (Visual) Clear, light amber liquid Clear, colorless to light amber liquid
Specific Gravity (25/25°C, ASTM D 4052)    
Specification Limits
Typical Value
0.884-0.890
0.887
0.890-0.900
0.893
Viscosity at -65°F (ASTM D 445),cSt
   
Specification Limits
Typical Value
≤ 60
44
≤ 275
240
Viscosity at 0°F (ASTM D 445), cSt
   
Typical Value
8 23
Viscosity at 100°F (ASTM D 445), cSt
   
Specification Limits
Typical Value
1.9-2.2
2.05
≤ 4.5
4.15
Viscosity at 210°F (ASTM D 445), cSt
   
Specification Limits
Typical Value
0.88-1.0
0.94
≤ 1.53
1.62
Viscosity at 40°C (ASTM D 445), cSt
   
Specification Limits
Typical Value

1.97
≤ 4.4
3.95
Viscosity at 100°C (ASTM D 445), cSt
   
Specification Limits
Typical Value

0.93
≤ 1.5
1.60
Pour Point (ASTM D 97), °F
<-100 <-90
Total Acid Number (ASTM D 664), mg KOH/g fluid
Specification Limits
Typical Value
≤ To 0.15
0.02
≤ 0.10
0.01
Moisture Content (Karl Fischer Titrator), ppm Specification Limits
≤ 150 ≤ 100
  • Boeing (McDonnell-Douglas)
  • Grumman
  • Hughes Aircraft
  • Northrop
  • Extended temperature range
  • Severe operating conditions
  • MIL-C-47220B Type III
  • MIL-C-47220B Type IV
  • MMS-652, Rev A
  • Grumman GM 6003A, Amendment-No 1
  • Type I
  • Hughes Aircraft HMS 20-1458 Rev E
  • Northrop MS-138, Rev A

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