Polyvinyl Alcohol
PVA-2488
Polyvinyl alcohol PVA -2488 is high polymer with excellent characters to dissolve easily in water but not to dissolve in common organic solvent and organic acids, and with excellent film-forming property, oil resistant, chemical-resistant.
Description
Technical Data
Property | Value | Unit |
Appearence | White powder | |
Hydrolysis degree | 87-89 | % |
Purity | ≥95 | % |
Viscosity | 44.0-59.9 | mPa.s |
PH | 5.0-7.0 | |
Volatile | ≤5.0 | % |
Ash | ≤0.3 | % |
Applications
- Paper sizing agent • Warp sizing in textile • Adhesive
- Raw material of polyvinyl alcohol panel and PVA thin film
- Paint and Coatings
- Medicine、cosmetic and functional materials
- Emulgator and dispersing agent
Packaging
25kg paper bags with inner PE bag.
Storage
The material is very stable with no risk of molding and deteriorating.
Under dry condition. Indefinite when protected from moisture.
Dissolving Method
Pouring a certain amount of water into the dissolving tank, the water temperature should be
below 30℃, then start the blender and pour into PVA slowly, the filling speed with PVA
should be keep into 10 kilograms per minutes advisable. Confirm the PVA powder has fully
dispersed (about 10-20 minutes) then heat the solution, and it can be completely dissolved
when heat to 90℃ about 1 hour.
Method of analysis
Viscosity is measured in 4% aqueous solution at 20℃. By a Brookfield type viscosimeter.
PH is measured in 4% aqueous solution at 20℃Ash expressed as Na2O.