Table 6 GHPG performance index evaluation results.
Type | Hydroxypropylguar gum | Ultra-high temperature guanidine gum | Standard guanidine gum |
|---|---|---|---|
Appearance | Light yellow powder | Yellow powder | White–yellow powder |
Fineness C1 (SSW0.125/0.09) ≥ , % | 100 | 100 | 100 |
Fineness C2 (SSW0.071/0.05) ≥ , % | 97 | 94 | 92 |
Water content ≤ , % | 8 | 7.6 | 9.8 |
Apparent viscosity (30 °C, 170 s−1) ≥ mPa·s | 107 | 98 | 86 |
Water insoluble content ≤ , % | 4–6 | 4–5 | 8.2 |
pH | 7.6 | 7.3 | 7.0–7.4 |
