MK-660 is a star-shaped hydrogenated styrene-diene polymer (HSD type viscosity index improver), with a styrene content of 6.0 – 7.5 wt%. Its appearance is white powder. MK-660 can be used as a viscosity index improver for lubricating oils, with remarkable viscosity adjustment effect and excellent shear resistance, suitable for blending high-grade multi-grade oils with a wide viscosity range. MK-660 has good solubility in various base oils, and can be dissolved in solvent-refined mineral oil, hydrogenated base oil, and fully synthetic oil products.
Product physical properties
| Project | D7601 | Testing method / standard |
| Appearance | white powder | Visual inspection |
| Specific gravity | 0.87 | GB/T528-2009 |
| Toluene viscosity (20℃, 10%), cps | 440 | ZLQM-GC1706001 |
| Melt Index (230℃, 5kg), g/10min | 0.60 | GB/T 3682-2000 |
The data represents typical values and cannot be used to establish product specifications
Application performance
In the constant force 150N base oil, 10 wt% dry gel was added and heated to dissolve to obtain the viscosity index improver liquid gel. Then, 10% of the liquid gel was dissolved in the constant force 150N base oil to obtain an oil sample with a polymer concentration of 1.0 wt%, and the performance of the oil sample was tested.
| Project1 | D760 | Testing method / standard |
| KV@100℃, mm2/s | 12.00 | GB/T 265 |
| Thickening capacity, mm2/s | 7.00 | SH/T 0622 |
| SSI@30Cycle | 10 | SH/T 0622 |
| SSI@250Cycle | 31 | |
| CCS@-30℃，cP | 4070 | GB/T 6538-2010 |
| MRV@-35℃，cP | 27700 | NB/SH/T 0562-2013 |
0.5% PPD is added to the formula
Characteristics: 1. Multi-arm star-shaped block copolymer 2. Good solubility in mineral oil or synthetic oil 3. Good compatibility with polyolefins 4. Recyclable and reprocessable 5. Safe and environmentally friendly.
