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High water solubility with rapid dissolution in cold and warm water.
Excellent film-forming capability and strong adhesion to polar substrates.
Good thermal stability and consistent viscosity performance during processing.
Low residual acetaldehyde content, meeting stringent safety and environmental requirements.
Controlled degree of hydrolysis (~87–89 mol%), offering balanced solubility and mechanical strength.
Water-soluble packaging films for agrochemicals and detergent pods.
Binders in ceramic green body formation and refractory shaping.
Thickener and stabilizer in construction adhesives and tile-setting mortars.
Protective colloids in emulsion polymerization (e.g., vinyl acetate-based systems).
Reinforcing agent in paper surface sizing and coating formulations.
| Chemical Type | Polyvinyl alcohol (partially hydrolyzed) |
| Product Form | White granular powder |
| Appearance | Free-flowing, odorless white granules |
| Degree of Hydrolysis | 87–89 mol% |
| Viscosity (4% aqueous solution, 20°C) | 24–26 mPa·s |
| Volatile Matter (105°C, 2 hrs) | ≤5.0 wt% |
| pH (5% aqueous solution) | 5.0–6.5 |
| Residual Acetate Content | ≤13.0 mol% |
Q1: What is the primary functional role of SVW-262 in water-based adhesive formulations?
A: SVW-262 serves as a film-forming binder and viscosity modifier, enhancing green strength, substrate wetting, and cohesive integrity during drying—particularly beneficial in paper, cardboard, and wood bonding applications.
Q2: How does SVW-262 compare to higher-saponification-grade PVAs in terms of solubility and gel temperature?
A: As a partially hydrolyzed PVA (typically ~87–89% saponification), SVW-262 offers faster room-temperature dissolution and a lower gelation temperature than fully hydrolyzed grades—making it well-suited for ambient-mixing processes and formulations requiring rapid hydration without prolonged heating.
Q3: Is SVW-262 suitable for use in textile sizing applications, and what performance benefits does it offer?
A: Yes—SVW-262 is widely used in warp sizing for natural and blended yarns. Its balanced hydrophilicity and film flexibility provide effective filament protection, reduced breakage during weaving, and good desizability under mild enzymatic or oxidative conditions.
Q4: What are key handling and storage recommendations to maintain product consistency?
A: Store in a cool, dry environment away from direct sunlight and moisture sources. Keep containers tightly sealed to prevent caking or partial hydration. When dissolving, gradually disperse the powder into cold or ambient water with moderate agitation before gentle heating to avoid surface gelation.
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