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High water solubility with rapid dissolution in cold and warm water.
Excellent film-forming capability yielding strong, flexible, and transparent films.
Good adhesion to polar substrates including paper, wood, and metal surfaces.
Low residual acetaldehyde content, supporting stringent safety and regulatory requirements.
Controlled hydrolysis degree (88–89 mol%) balancing solubility, strength, and biodegradability.
Water-soluble packaging films for agrochemicals, detergents, and industrial cleaners.
Binder in ceramic green bodies and refractory casting slurries.
Thickener and stabilizer in aqueous pigment dispersions and textile sizing formulations.
Emulsifier and protective colloid in vinyl acetate and acrylic emulsion polymerization.
Base polymer for high-performance adhesives used in corrugated board and laminating applications.
| Chemical Type | Polyvinyl alcohol (partially hydrolyzed) |
| Product Form | White granular powder |
| Appearance | Free-flowing, odorless granules |
| Hydrolysis Degree | 88–89 mol% |
| sP Value (HSP) | ~10.5 MPa1/2 |
| Viscosity (4% aq. sol., 20°C) | 21–23 mPa·s |
| Residual Acetate Content | 11–12 mol% |
| pH (5% aqueous solution) | 5.5–7.0 |
Q1: What is the primary functional role of POVAL PVA 224 in aqueous formulations?
A: POVAL PVA 224 functions primarily as a water-soluble film former and rheology modifier, offering excellent adhesion, cohesive strength, and substrate wetting in coatings, adhesives, and binder systems.
Q2: How does PVA 224 differ from higher-viscosity or fully hydrolyzed PVA grades?
A: PVA 224 features medium molecular weight and partial hydrolysis, delivering balanced solubility, moderate solution viscosity, and improved compatibility with hydrophobic components—making it especially suitable for emulsion stabilization and hybrid polymer systems where rapid dissolution and processing ease are critical.
Q3: Is POVAL PVA 224 suitable for use in food-contact or pharmaceutical applications?
A: While POVAL PVA 224 is manufactured under strict quality control and meets general industrial purity standards, its suitability for regulated end uses—including food contact or pharmaceuticals—requires formal evaluation and approval by the end-user’s regulatory team, based on full compliance documentation and application-specific validation.
Q4: What are key handling considerations during dissolution of PVA 224?
A: For optimal dissolution, gradually disperse PVA 224 into cold water with vigorous agitation to prevent agglomeration; then heat gently to 80–90°C while maintaining mixing until fully clear and homogeneous—avoid prolonged high-temperature exposure to minimize thermal degradation.
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