POLYVINYL ALCOHOL
Paint chemicals 2025-03-21
Polyvinyl Alcohol is a white or yellowish, granular or powdery, stable, non-toxic, water-soluble polymer. Polyvinyl Alcohol has good film making property, the film formed has excellent adhesion, solvent resistance, abrasion resistance, tensile strength and oxygen barrier. Polyvinyl alcohol has both hydrophilic and hydrophobic functional groups, so polyvinyl alcohol has the nature of interface activity, can also be used as polymer emulsification, suspension polymerization reaction of the protective colloid.
| Item | Description |
| Name | Polyvinyl Alcohol (PVA) |
| Chemical Formula | (C₂H₄O)n |
| Appearance | White powder or colorless film |
| Solubility | Soluble in water, insoluble in organic solvents such as acetone and toluene |
| Molecular Weight | Varies based on degree of polymerization; typically ranges from 30.000 to 100.000 g/mol |
| Melting Point | Around 225-235°C (decomposes before melting) |
| Density | Approximately 1.19-1.31 g/cm³ |
| Functionality | Highly versatile polymer used in various industries due to its adhesive, film-forming, and emulsifying properties |
| Production Method | Produced through the hydrolysis of polyvinyl acetate under controlled conditions |
| Degree of Hydrolysis | Typically ranges from 80% to 99.9%, affecting properties like water solubility and crystallinity |
| Applications | Used in textile sizing, paper coating, adhesives, films for packaging, and as a dispersant in ceramic processing |
| Environmental Properties | Biodegradable under certain conditions; often preferred over non-biodegradable alternatives |
| Safety | Generally recognized as safe (GRAS) by FDA for specific applications; low toxicity |
| Advantages | Excellent film-forming ability, good tensile strength, high oxygen barrier property, and eco-friendly nature |
| Disadvantages | Limited solvent resistance, sensitive to moisture, and requires careful handling during storage to prevent degradation |
| Key Manufacturers | Companies like Kuraray, Celanese, and Shin-Etsu are leading producers globally |
