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High water solubility with rapid dissolution in cold to warm water.
Excellent film-forming capability and mechanical strength after drying.
Superior adhesion to polar substrates including paper, wood, and cellulose fibers.
Low residual acetate content ensuring high hydrophilicity and biodegradability.
Consistent batch-to-batch quality and narrow molecular weight distribution.
Water-soluble binder for nonwoven fabrics and textile sizing.
Adhesive component in paper coating and laminating formulations.
Protective colloid in emulsion polymerization of vinyl acetate and acrylic monomers.
Base polymer for water-soluble packaging films and agricultural mulch films.
Thickener and stabilizer in ceramic green body processing and tile adhesive systems.
| Chemical Type | Polyvinyl alcohol (fully hydrolyzed) |
| Product Form | White to off-white free-flowing powder |
| Appearance | Free-flowing granular or powdered solid |
| Saponification Degree | 98.0–99.0 mol% |
| Viscosity (4% aqueous solution at 20°C) | 4.2–5.2 mPa·s |
| Residual Acetate Content | ≤1.5 wt% |
| pH (4% aqueous solution) | 5.0–7.0 |
| Moisture Content | ≤5.0 wt% |
Q1: What is the typical degree of hydrolysis and molecular weight range for POVAL PVA 105?
A: POVAL PVA 105 is a fully hydrolyzed polyvinyl alcohol grade with a nominal degree of hydrolysis above 99%, offering high water solubility and strong film-forming capability. Its viscosity-average molecular weight is designed to deliver medium solution viscosity—suitable for applications requiring balanced processability and mechanical strength in dry films.
Q2: How does POVAL PVA 105 perform in aqueous coating formulations?
A: POVAL PVA 105 serves effectively as a binder and rheology modifier in water-based coatings, providing excellent adhesion to polar substrates, good clarity, and low foaming tendency. It enhances surface smoothness and improves pigment dispersion stability without compromising drying characteristics.
Q3: Is POVAL PVA 105 compatible with common crosslinkers used in industrial adhesives?
A: Yes—POVAL PVA 105 exhibits good reactivity with aldehyde-based crosslinkers (e.g., glyoxal) and certain multifunctional aziridines under controlled pH and thermal conditions. Crosslinking improves water resistance and cohesive strength in adhesive films, though optimal performance depends on formulation balance and cure profile.
Q4: What are key handling considerations during dissolution of POVAL PVA 105?
A: For efficient dissolution, gradual addition to cold water with vigorous agitation is recommended to prevent agglomeration. Once dispersed, heating to 80–90°C accelerates complete dissolution. Avoid prolonged high-shear mixing at elevated temperatures after full dissolution to minimize potential polymer degradation.
Q5: Can POVAL PVA 105 be used in food-contact or pharmaceutical-related applications?
A: POVAL PVA 105 is manufactured under strict quality control and meets general purity requirements for technical-grade polyvinyl alcohol. While it is not pre-certified for direct food contact or pharmaceutical use, customers may evaluate its suitability based on their own regulatory assessments and intended application context.
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