PVA 2688G
The PVA 2688 Granule production facilities of our company have been perfecting day by day with the long-term absorption and technological transformation on the basis of importing the complete set of technology from European Company. PVA produced by our company is good in performances and stable in quality. It enjoys a great reputation both at home and abroad.
Produkt Funktion:
Partial Alcoholysis.
Lav viskositet.
Ækvivalente karakterer:
CCP BP-26
Sekisui Selvol 540 - Celanses
Produkt Parameter (specifikation)
|
Vare |
PVA 2688G |
|
Hydrolyse (mol%) |
87.0 ~ 89.0 |
|
Viskositet (mPa.s) |
50.0 ~ 58.0 |
|
Flygtig(wt%) |
≤5.0 |
|
Aske (wt%) |
≤0.5 |
|
pH-værdi |
5 ~ 7 |
|
Renhed (%) |
≥91.5 |
|
ParticleSize |
20~25net |
Opbevaring:The product should be stored in a dry and ventilated room with a room temperature of 5-30℃ and stored in batches. Keep away from power, moisture, and sunlight. It is strictly prohibited to store together with volatile chemicals to prevent deterioration due to adsorption.
Transport:Ved transport kræves rene køretøjer, og man skal være opmærksom på at undgå fugt, regn og solbeskyttelse. Håndter med forsigtighed for at forhindre beskadigelse af emballagen. Det er strengt forbudt at opbevare sammen med flygtige kemikalier for at forhindre forringelse af adsorptionen.
OFTE STILLEDE SPØRGSMÅL
Q: What’s the property Index of polyvinyl alcohol ?
A:Polyvinyl alcohol PVA is a solid substance, colorless and scentless in the shape of floccus, flake or granule. As it contains plenty of hydroxyl groups in its molecule, PVA is easily soluble in water as well as in organic compounds also containing hydroxyl such as glycerol, glycol, acetic acid, acetaldehyde and benzoic acid, except for general organic solvents in which it is insoluble. When heated up to 130-140, PVA gets yellow without essential changes in nature; when at 160for a longer time, it gets darker; at 200, inter-molecular dehydration takes place with lower water solubility; at above 200, intra-molecular dehydration takes place; nearly at 300, PVA is decomposed into water, acetic acid, acetaldehyde and crotonaldehyde. The bulk densities of PVA vary depending on methods of alcoholysis: 0.2~0.27g/ml for high alkali alcoholysis and 0.42~0.52 g/ml for low alkali alcoholysis.
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