item
| grade
| quality index | actual measurement |
needle penetration (25°C,100g,5s)1/10mm |
| 60~80 | 74 |
softening point °C ≥ | A | 46 | 46.4 |
| B | 44 |
|
Ductility (5cm/min,10°C),cm ≥ | A | 25 | 90 |
| B | 20 |
|
wax content (Distillation),% ≤ | A | 2.2 | 2.04 |
| B | 3.0 |
|
flash point,°C ≥ |
| 260 | >260 |
solubility (trichloro ethylene )% ≥ |
| 99.5 | 99.95 |
density(15°C),g/cm3 |
| 1.014 | 1.014 |
TFOT | |||
quality change % ≤ |
| ±0.8 | -0.01 |
Residual penetration ratio % ≥ | A | 61 | 72.5 |
| B | 58 |
|
ductility (5cm/min,10°C),cm ≥ | A | 96 | 8 |
| B | 4 |