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High water solubility with rapid dissolution in cold and warm water.
Excellent film-forming capability yielding transparent, flexible, and abrasion-resistant films.
Good adhesion to polar substrates including paper, cellulose, and metal surfaces.
Consistent batch-to-batch quality ensured by Sinopec’s ISO 9001-certified production system.
Low residual acetate content (< 2.5%) contributing to enhanced hydrophilicity and biodegradability.
Water-soluble packaging films for agrochemicals and detergent pods.
Binder in ceramic green body formation and refractory shaping.
Thickener and stabilizer in textile sizing formulations.
Emulsifier and protective colloid in vinyl acetate emulsion polymerization.
Adhesive component for paper lamination and corrugated board bonding.
| Chemical Type | Polyvinyl alcohol (partially hydrolyzed) |
| Product Form | White granular or flake solid |
| Appearance | Free-flowing, odorless white particles |
| Saponification Degree | 87–89 mol% |
| Viscosity (4% aqueous solution, 20°C) | 25–29 mPa·s |
| Volatile Matter (105°C, 2 hrs) | ≤ 5.0 wt% |
| pH (5% aqueous solution) | 5.5–6.5 |
| Residual Acetaldehyde Content | ≤ 0.03 wt% |
Q1: What are the key characteristics of Sinopec Chuanwei PVA 098-27 that distinguish it from other PVA grades?
A: PVA 098-27 is a partially hydrolyzed polyvinyl alcohol with balanced solubility and film-forming capability. It offers good cold-water dispersibility, moderate viscosity in solution, and strong adhesion to polar substrates—making it especially suitable for applications requiring rapid dissolution without excessive gelation.
Q2: Is PVA 098-27 compatible with common industrial additives such as plasticizers, surfactants, or crosslinkers?
A: Yes, PVA 098-27 demonstrates broad compatibility with conventional formulation additives including glycerol, ethylene glycol, nonionic surfactants, and aldehyde-based crosslinkers. Compatibility should be verified under actual processing conditions due to potential interactions affecting solution stability or film integrity.
Q3: How does temperature affect the dissolution behavior of PVA 098-27 in aqueous systems?
A: PVA 098-27 dissolves readily in cold water with gentle agitation, though complete dissolution may require mild heating (typically up to 60–70 °C) depending on concentration and mixing efficiency. Excessive heat or prolonged high-temperature exposure should be avoided to prevent thermal degradation or premature viscosity loss.
Q4: In what types of coating or adhesive formulations is PVA 098-27 most frequently applied?
A: This grade is commonly used in paper coating binders, textile warp sizing agents, and water-based wood adhesives where balanced tack, cohesive strength, and substrate affinity are required. Its hydrolysis level supports both workability during application and adequate water resistance in dried films.
Q5: What storage conditions are recommended to maintain the quality and handling performance of PVA 098-27?
A: Store in a cool, dry, well-ventilated area away from direct sunlight and sources of moisture or humidity. Keep containers tightly sealed after opening to prevent agglomeration or partial hydration, which may affect dissolution kinetics and batch consistency.
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