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DEMNUM is a thermally and chemically stable and non-flammable oil which takes full advantage of the properties of fluorochemicals. It is particularly appropriate for applications where lubrication is required over wide-ranging temperatures and when a high degree of cleanliness is required. In addition, it is insoluble water and solvents, and has no effect on rubbers and plastics, making it ideal for a wide range of uses.
DEMNUM GREASE is a grease formed with DEMNUM as the base oil, giving it the same excellent heat resistance and solvent resistance as DEMNUM. When used inside sealed bearings, it exhibits low torque at low temperatures and good durability at high temperatures, and can be used under a wide temperature range. In addition, because it has a low vapor pressure, it is also suitable for use as a lubricating grease in cleanrooms. |
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S - 20 |
S - 65 |
S - 200 |
Average
molecular
weight |
2700 |
4500 |
8400 |
Kinetic
viscosity
(m2/s) |
20Ž
40Ž
60Ž |
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(53±10)~10-6
(25± 5)~10-6
(14± 3)~10-6 |
(150±15)~10-6
(65± 7)~10-6
(33± 4)~10-6 |
(500±50)~10-6
(200±20)~10-6
(95±15)~10-6 |
| Viscosity index |
150 |
180 |
210 |
| Pour point (Ž) |
-75 |
-65 |
-53 |
Density20Ž
(‚‡/ml) |
1.860 |
1.873 |
1.894 |
Refractive
index(nD 20) |
1.290 |
1.295 |
1.298 |
Surface
tension
(mN/m) |
17.7 |
18.0 |
19.1 |
| Tg(Ž) |
-115 |
-111 |
-104 |
Vapor loss
After
3 hours,% |
150
6 |
200
2 |
300
2 |
| Other physical properties |
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Specific heat (cal/g) 0.24
Dielectric breakdown voltage (2.5mm, kV) 72 |
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Note: All values are based on JIS measurement techniques |
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Measurement Method: Put 20 grams of oil in a Petri oven, and measure amount of reduction |
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| Item |
Condition |
L65 |
L200 |
| Appearance |
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white opaque |
white opaque |
| penetration |
0 strokes |
280}15 |
280}15 |
| 60 strokes |
280}15 |
280}15 |
| Mechanical Stability |
104 strokes |
260~290 |
260~290 |
| 105 strokes |
260~290 |
260~290 |
Apparent (mPa¥s)
Viscosity |
250
300s-1 |
2500 |
5300 |
| Dropping point |
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None |
None |
| Evaporation |
200, 22h |
< 1mass% |
< 0.1mass% |
| Oil separation |
100,30h |
< 3mass% |
< 2mass% |
| 200, 30h |
< 12mass% |
< 10mass% |
| 300, 30h |
- |
< 16mass% |
| Copper corrosion |
RT, 24h |
1a |
1a |
| 100, 24h |
1a |
1a |
| Oxidation stability |
100, 100h |
< 0.1 |
< 0.1 |
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