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| oil/water ratio (vol %) |
||||
|---|---|---|---|---|
| silica-NH2 (wt %) | 5:95 | 10:90 | 20:80 | 30:70 |
| 0.1 | no emulsion | no emulsion | no emulsion | no emulsion |
| 1 | 6 months | 6 months | 6 months | 6 months |
| 2 | 6 months | 6 months | 7 months | 7 months |
| 3 | 7 months | 7 months | 7 months | 7 months |
| 5 | 6 months | 6 months | >7 months | >7 months |
