PVA 2488S is called 2488 Fine Powder and it used to produce textile sizing materials, coatings, adhesive, and it is widely used for paper processing, emulsifying agents, dispersants and blocking colloids. Besides, it can be employed as membranes, soil modifiers,etc. Mainly used to produce textile sizing materials, coatings,adhesive, acetal derivations, and it is extensively applied to paper processings, emulgents, dispersants and blocking colloids.
Caractéristiques du produit :
Partiellement hydrolysé.
Faible viscosité.
Grades équivalents :
088-50
Kururay PVA-224
Kururay Mowiol 47-88
CCP BP-24S
Sekisui Selvol 350 – Celanses
JVP JP-24
Nichigo GH-22
Produit Paramètre (spécification)
|
Objet |
PVA 2488S |
|
Hydrolyse (mole%) |
87.0 ~ 89.0 |
|
Viscosité (mPa.s) |
44.0 ~ 50.0 |
|
Volatile(wt%) |
≤5.0 |
|
Frêne (wt%) |
≤0.5 |
|
Valeur du pH |
5 ~ 7 |
|
Pureté (%) |
≥91.5 |
|
Taille des particules |
Poudre fine, 80~200maille |
Stockage : Conserver dans un endroit ventilé, frais et sec, à l'abri du feu, de l'électricité, de l'humidité et du soleil. Il est strictement interdit de le stocker avec des produits chimiques volatils afin d'éviter toute détérioration par adsorption.
Transport : Pendant le transport, les voitures doivent être propres, il faut veiller à éviter l'humidité, la pluie et la protection solaire. Manipuler avec précaution pour éviter d'endommager l'emballage. Le stockage est très limité avec des agents temporaires pour éviter les dommages dus à l'adsorption.
FAQ
Q: Is polyvinyl alcohol soluble?
A: Polyvinyl alcohol powder is water soluble with transparent solution. Most PVA series are used while dissolved in water. Its solubility depends mainly on degrees of polymerization and alcoholysis. At the same temperature, the solubility increases along with reduction of the degree of alcoholysis, and decreases with increase of the viscosity; for the PVA series with the same degree of polymerization, if their degrees of alcoholysis are low, their temperatures get low upon completion of dissolution, and vice versa; for the PVA of the same alcoholysis, if the degrees of polymerization are high, their temperatures get high upon completion of dissolution, and vice versa. The PVA at the degrees of alcoholysis above 88 (mol/mol)% depends greatly on temperature changes, that is, dissolution or partial swelling may not take place at a particular temperature.
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