MK-6732V Polymethacrylate (PMA) Viscosity Index Improvers for Ultra-low Temperature Oil
Ultra-low temperature oil is widely used for mechanical equipment in extremely cold regions with a working temperature as low as -50℃, whose harsh environment makes enormous demands on the viscosity-temperature performance, especially the low-temperature performance, of the oil. To be specific, ultra-high viscosity index, ultra-low pour point and low-temperature kinematic or dynamic viscosity are required, and the shear stability of the oil under certain working conditions needs to be taken into consideration as well. Our products designed for ultra-low temperature oil show better performance in such respects, and this series of products can also be used when similar performance is asked for, such as in aviation oil and high-performance shock absorber oil. The products in the following tables are developed with differentiated focuses for the performance, such as viscosity index improvement and shear stability, in order to meet all kinds of needs.
Polymethacrylate(PMA) for Ultra-low Temperature Oil Typical Data
| Item | Typical Data | Test Method | |
| Appearance | Transparent Viscous Liquid | Visual Check | |
| Kinematic Viscosity (100℃), mm²/s | 1000-1300 | GB/T 265 | |
| Colour, number | 0.5 | GB/T 6540 | |
| Density (20℃), kg/m³ | 890 | SH/T 0604 | |
| Flash Point (Open Cup), ℃ | 160 | GB/T 3536 | |
| Thickening Ability | 4.77 | SH/T 0622 Appendix A | |
|
PSSI
|
Diesel Injector Shear, 30 Cycles, % | 0.42 |
SH/T 0103 |
| Diesel Injector Shear, 90 Cycles, % | 1.46 | ||
| Diesel Injector Shear, 250 Cycles, % | 1.7 | ||
| KRL 20 h, % | 48 | NB/SH/T 0845 | |
| Note: According to Appendix A, the product is added to HVI150 base oil, and the increase in kinematic viscosity (100℃) of the blended oil with 10% PMA viscosity index improver is measured. | |||
Recommended Formula in 10# Aviation Hydraulic Oil
| 10# Aviation Hydraulic Oil | ||
| PAO2, %wt | 95.2 | |
| MK-6732V | 4 | |
| Functional Additives | 0.8 | |
| Non-Silicon Defoamer | 300 ppm per ton | |
| Item | Quality Index | Test Method |
| Appearance | Red Transparent Liquid | Visual Check |
| Kinematic Viscosity (50℃), mm²/s | ≥10 | GB/T 265 |
| Kinematic Viscosity (-40℃), mm²/s | ≤2500 | GB/T 265 |
| Cu Corrosion (70±2℃, 24h), mm²/s | ≤2 | GB/T 5096 |
| Acid Value, mg KOH/g | ≤0.05 | GB/T 264 |
| Flash Point (Open Cup), ℃ | ≥92 | GB/T 3536 |
| Solidification Point, ℃ | ≤-60 | GB/T 510 |
| Water, %vol | ≤Trace | GB/T 260 |
| Mechanical Admixtures, %wt | None | GB/T 511 |
| Water-Soluble Acid or Alkali | None | GB/T 259 |
| Oil Film Quality (65℃±1℃, 4h) | Qualified | Appendix A |
| Low-temperature Stability (-50℃±1℃, 72h) | Qualified | Appendix B |
| Density (20℃), kg/m³ | ≤880 | GB/T 1884 |
| Item | Item | Quality Index | Test Method |
| Oxidation Stability (140℃, 60h) | Kinematic Viscosity after Oxidation, mm²/s, 50℃ | ≥9.0 | SH/T 0208 |
| Kinematic Viscosity after Oxidation, mm²/s, -40℃ | ≤2800 | ||
| Acid Value after Oxidation, mg KOH/g | ≤0.15 | ||
| Corrosion, mg/cm² (Steel) | ≤±0.15 | ||
| Corrosion, mg/cm² (Copper) | ≤±0.15 | ||
| Corrosion, mg/cm² (Aluminum) | ≤±0.1 | ||
| Corrosion, mg/cm² (Magnesium) | ≤±0.15 | ||
| A. The sample is extracted with 95% ethanol (analytically pure) and 0.1% bromothymol blue is used as the indicator.
B. This assuring item is evaluated annually. |
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| Item | Item | Quality Index | Test Method |
| Oxidation Stability (140℃, 60h) | Kinematic Viscosity after Oxidation, mm²/s, 50℃ | ≥9.0 | SH/T 0208 |
| Kinematic Viscosity after Oxidation, mm²/s, -40℃ | ≤2800 | ||
| Acid Value after Oxidation, mg KOH/g | ≤0.15 | ||
| Corrosion, mg/cm² (Steel) | ≤±0.15 | ||
| Corrosion, mg/cm² (Copper) | ≤±0.15 | ||
| Corrosion, mg/cm² (Aluminum) | ≤±0.1 | ||
| Corrosion, mg/cm² (Magnesium) | ≤±0.15 | ||
| A.Extract the sample with 95% ethanol (analytically pure) and use 0.1% bromothymol blue as the indicator.
B. We evaluate this assuring item annually. |
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Applications in Ultra-low Temperature Oil |
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| Products | PSSI (KRL 20h) | Product Features | Suggested Applications |
For use with low-viscosity Group II, III, IV and V and naphthenic base oils |
| MK-6731V | 36 | Excellent Shear Stability and Low-temperature Performance; Good Performance in Improving the Viscosity Index | Oil used in extremely cold regions requiring excellent shear stability, viscosity index improvement and low-temperature performance | |
| MK-6732V | 48 | Good Shear Stability; Excellent Low-temperature Performance and Viscosity Index Improvement | Oil used in extremely cold regions requiring excellent viscosity index improvement and low-temperature performance and aviation hydraulic oil | |
| MK-6733V | 63 | Outstanding Low-temperature Performance and Viscosity Index Improvement | Shear-stable oil used in extremely cold regions requiring excellent viscosity index improvement and low-temperature performance, shock absorber oil or other special oil | |
Suggested Use
Add 1.0%~15.0%wt to the specified base oils. Given the different types of base oils, we need to test the blended oil’s thickening, viscosity index, and pour point to determine the exact amount of MK-6732V functional polymer required..
Polymethacrylate(PMA) type for Ultra-low Temperature Oil Packaging
MK-6732V, a solution of modified polymethacrylate (PMA) in deeply refined mineral oil, comes in 200 L steel drums (net weight 175 kg) or IBC tanks (net weight 900 kg).
Product Features:
- Good Shear Stability;
- Excellent Low-temperature Performance
- Viscosity Index Improvement
