Viscosity index/(ml/g) K-value Average degree of polymerization | 100~120 66 900~1150 | |||
Standard paste viscosity(Brookfield viscosity)/Pa.s | 3.0~6.0 | |||
Apparent density / (g/cm3) | 0.30~0.45 | |||
Grade | Excellent grade | Class-A product | Qualified product | |
Number of impurity particles | 12 | 20 | 40 | |
Volatile component/%≤ | 0.35 | 0.40 | 0.50 | |
Sieve residue /% | 250μm sieve size ≤ | 0 | 0.1 | 0.2 |
| 63μm sieve size ≤ | 0.1 | 1.0 | 3.0 |
Paste thickening rate (24h)/% ≤ | 100 | 100 | - | |
Whiteness (160ºC,10min)/% ≥ | 80 | 76 | - | |
Scraper fineness/μm ≤ | 100 | - | - | |
VCM residue /(μg/g)≤ | 5 | 5 | 10 |