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.
产品 特点:
部分酒精中毒
低粘度。
同等学历：
CCP BP-26
Sekisui Selvol 540 - Celanses
产品 参数（规格）
|
项目 |
PVA 2688G |
|
水解（摩尔%） |
87.0 ~ 89.0 |
|
粘度（mPa.s） |
50.0 ~ 58.0 |
|
挥发性（wt%） |
≤5.0 |
|
灰分（wt%） |
≤0.5 |
|
pH 值 |
5 ~ 7 |
|
纯度 (%) |
≥91.5 |
|
粒子大小 |
20~25网目 |
存储：产品应存放在干燥通风的室内，室温为 5-30℃，并分批存放。远离电源、湿气和阳光。严禁与易挥发的化学品一起存放，以防吸附变质。
交通运输时要求车辆清洁，注意防潮、防雨、防晒。小心搬运，防止损坏包装。严禁与易挥发的化学品存放在一起，以防吸附变质。
常见问题
Q: 聚乙烯醇的属性指数是多少？
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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