Completely hydrolyzed polyvinyl alcohol (PVA) is formed by replacing all acetate groups with hydroxyl groups during the alcoholysis process, forming a completely water-soluble polymer. This type of PVA has extremely high solubility and can completely dissolve in water at very low temperatures. The high crystallinity of completely hydrolyzed PVA makes it very soluble in water, but it is almost completely soluble when the alcoholysis degree reaches 97%. Completely hydrolyzed PVA typically needs to be heated to 80°C to dissolve completely.
| Item No# | Alcoholysis Degree
(mol/mol,%) |
Viscosity①
(mPa·s) |
Sodium Acetate
(%≤) |
Volatiles
(%≤) |
Purity
(% ≥) |
Ash Content②
(%≤) |
pH①
(Value) |
| 17-99 | 99.3-100 | 22.0-33.0 | 1.5 | 5.0 | 94.0 | 0.7 | 5~7 |
| 17-99 (L) | 98.2-98.8 | 28.0-32.0 | 1.5 | 5.0 | 94.0 | 0.7 | 5~7 |
| 20-99 | 99.3-100 | 45.0-55.0 | 1.5 | 5.0 | 94.0 | 0.7 | 5~7 |
| 24-99 | 99.3-100 | 65.0-76.0 | 1.5 | 5.0 | 94.0 | 0.7 | 5~7 |
| 26-99 | 99.3-100 | 76.1-82.0 | 1.5 | 5.0 | 94.0 | 0.7 | 5~7 |
| 26-99(C) | 99.3-100 | ≥82.1 | 1.5 | 5.0 | 94.0 | 0.7 | 5~7 |
Remark：Polyvinyl alcohol products follow the product standards of Sinopec.
- Viscosity and pH values were tested in a 20℃,4% aqueous solution.
- Ash content is expressed in terms of na2o.
- If customers need special specifications (viscosity, alcohol degree) products, our company can produce and make according to the needs.
- If there is any abnormal phenomenon in the process of using our products, you should immediately stop using them and call our after-sales service number: +86 15061500815 to consult our technicians.