Polyvinyl Alcohol PVOH®9655
ANHUI LIWEI CHEMICAL CO.,LIMITED
[Introduction]
PVOH®9655 is a fully hydrolyzed medium molecular weight polyvinyl alcohol (PVOH). Using our exclusive batch process which has advantages over other manufacturing methods,allows more efficient control over the degree of hydrolysis and particle size of the product.
Specifications
| Appearance | Slightly Yellow grains solid |
|---|---|
| Total Solids wt%(min) | 97.0 |
| Degree of Hydrolysis (mole %) | 95.0±1.5 |
| Viscosity@20°C,4% solution (mPa.s) | 55.0±4.0 |
| Ash Content (as Na2O) wt% (max) | 0.4 |
| pH value | 5.0-7.0 |
Packing & Storage
| Packing | In 20kg paper bag. |
|---|---|
| Storage | Powder 20°C 2 years; Floccule 20°C 2 years. |
| Shipping | Room temperature 5-30℃ in China; may vary elsewhere |
Free Quote
Liwei PVA is one of the top 10 PVA factories and the top 100 strongest enterprises in anhui province.In 2010,Liwei PVA is evaluated as advanced and high technical company. We mainly deals in polyvinyl alcohol,PVA,PVA fiber and raw materials for producing PVA like vinyl acetate.
For samples, pricing, or more information, please call us at 0086-25-52397803 or mail to info@china-pva.net or fill out the following form. We will respond to you as soon as possible.
Tel: 0086-25-52397803
E-mail: info@china-pva.net
Frequently Asked Questions
GENERAL INFORMATION
PVOH®9655 is a 96.0mole% hydrolyzed, polyvinyl alcohol which has been specially developed for use as a primary suspending agent for vinyl chloride suspension polymerisation. Using our exclusive batch process which in that it allows more efficient control over the degree of hydrolysis and particle size of product. PVOH®9655 has high molecular weight and high viscosity in the grade.
USES
Specifically, PVOH®9655 is a suspending agent for suspension polymerisation of vinyl chloride monomer (VCM).
STORAGE
1.PVOH®9655 should be stored away from wet areas and naked flames. Ingress of moisture should be avoided to maintain product quality.
2.As supplied, the product should remain fit for use for 12 months from the date of delivery. Beyond that date, the material may still be fit for use, but we would advise that it is good practice to test the material. As such, we advise that material stored for 12 months or more after delivery should be tested before use.
3.Aqueous solutions of PVOH®9655 if stored for long periods at elevated temperatures are prone to mould and bacterial attack.
FOR USED IN VCM SUSPENDING POLYMERISATION
PVOH®9655 has an influence on the PVC resin grain size distribution, porosity and bulk density. This is due to the products surface active nature, reducing the interfacial tension and enhancing distribution of initiator throughout the batch.
The principal advantages of using PVOH®9655 can be summarized as follows.
1.The PVC grains made with PVOH®9655 tend to be more spherical such that higher bulk density may be combined with minimum reduction in porosity and with optimum flow characteristic.
2.The combination of PVOH®9655 and PVOH®725 or secondary suspending agent grades give PVC resins of narrow grain size distribution and a good balance of bulk density and porosity.
