Poly(vinyl alcohol)
- Createtime： 2026-04-14
- Updatetime： 2026-09-30
Product Details
| useage |
Industrial use
|
| deliveryInfo |
|
| appearance |
powder
|
| aliasen |
|
| supplyCapacity |
50000MT/Month
|
| harbor |
Qingdao,China
|
| minorder |
1KG
|
| Molecular Formula |
(C2H4O)n
|
| Appearance |
White powder
|
Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
1. Basic Info
Name: Poly(vinyl alcohol)
Alias: PVA, PVOH
CAS No.: 9002-89-5
Molecular Formula: (C2H4O)n
Molecular Weight: Variable polymer, typical range 10000–200000
2. Physical & Chemical Properties
Physical Properties
- Appearance: White or off-white flaky, granular or powdery solid, odorless
- Solubility: Only soluble in hot water (80–95℃); insoluble in cold water, ethanol, acetone, benzene, mineral oil and other organic solvents
- Density: 1.26–1.31 g/cm3
- Glass transition temperature Tg: 75–85℃
- Melting decomposition: Starts to decompose around 200℃, no stable melting point
- Hygroscopy: Strongly hygroscopic under high humidity environment
- Film-forming property: Excellent film-forming ability; formed film is transparent, tough, oil-resistant and gas barrier
- Surface tension: Aqueous solution reduces surface tension, good wetting and adhesion
- Classification index: Differentiated by alcoholysis degree (87–89%, 99% etc.) and viscosity degree
Chemical Properties
- Molecular structure: Linear polymer with a large number of hydroxyl groups on the carbon main chain, hydrophilic polar groups
- Alcoholysis classification: Partial alcoholysis PVA retains a small amount of acetate groups; fully alcoholysis PVA has almost all hydroxyl groups
- Crosslinking reaction: Hydroxyl groups can crosslink with borax, glutaraldehyde, tetrabutyl titanate, boric acid to form water-resistant gel
- Esterification/etherification: Reacts with organic acids, acid anhydrides to generate PVA ester derivatives
- Thermal decomposition: Above 200℃ dehydration occurs, generates conjugated polyene and turns yellow/brown; carbonized above 250℃
- Acid-base stability: Stable in neutral and weak alkaline solutions; concentrated strong acid causes degradation and hydrolysis; strong alkali has little corrosion at room temperature
- Biodegradability: Low molecular weight PVA can be biodegraded by microorganisms
- Compatibility: Compatible with starch, gelatin, cellulose, water-based resins; incompatible with strong oxidants, borax in high dosage without control
3. Main Application Fields
1. Textile Industry (Core Application)
- Warp sizing agent: Sizing for cotton, polyester, yarn to improve tensile strength, reduce breakage rate, easy desizing
- Fabric finishing agent, coating adhesive for non-woven fabrics
2. Water-based Coating & Adhesive
- Environmentally friendly water-based glue: Paper glue, wood glue, wallpaper adhesive, office solid glue
- Protective colloid for emulsion polymerization (polyvinyl acetate latex, acrylic emulsion stabilizer)
- Water-based paint film-forming auxiliary, pigment dispersant
4. Paper Industry
- Surface sizing agent for paper, improve paper smoothness, printability and oil resistance
- Coating binder for coated paper, coated cardboard
5. Film & Packaging Materials
Water-soluble PVA film: Agricultural mulch film, laundry detergent packaging film, disposable medical packaging film, fully biodegradable packaging material
6. Construction & Building Auxiliary
Cement, mortar internal additive, retarder, crack-resistant modifier; interior wall putty adhesive
7. Medical, Cosmetic & Food
- Pharmaceutical excipient: Slow-release carrier, capsule coating, eye drop thickener
- Cosmetic film-forming agent in facial mask, gel, hair styling products
- Food contact packaging auxiliary, food release film raw material
4. Quality Specification Table
| Test Item | Standard Index |
| CAS Number | 9002-89-5 |
| Molecular Formula | (C2H4O)n |
| Molecular Weight | 10000–200000 (customized viscosity grade) |
| Appearance | White powder |
| Alcoholysis Degree | 87–89% / 98–99% (two mainstream grades) |
| Viscosity (4% aqueous solution, 20℃) | 3–70 mPa·s |
| Volatile Matter (Moisture) | ≤5.0% |
| Ash Content | ≤0.7% |
| pH (4% aqueous solution) | 5.0–7.0 |
| Insoluble Impurities | ≤0.05% |
| Bulk Package | 25kg PE lined woven bag |
| Storage Condition | Hermetic cool dry warehouse ≤25℃; isolate humid air, high temperature heat source |
| Transportation Rule | Ordinary polymer solid, moisture-proof packaging |
| Shelf Life | 24 months under intact sealed packaging |
