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.

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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

 

I.webp Ratgeber Dunkle Wand – Weiss Streichen

 

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.