What are the uses of polyvinyl alcohol powder? What are its applications?
Product Applications
1. Calcium Gray Base Putty: Even a very small amount added can significantly improve the cohesive strength, adhesion, and water resistance of the putty coating, reducing the amount of calcium gray powder needed and noticeably improving the phenomenon of delamination and scarring during sanding. It also improves the surface smoothness of the putty after sanding.
2. Cement-Based Exterior Wall Putty: It can increase the setting speed of cement, improve the early strength of the putty, has good film-forming properties, excellent durability, and is less prone to powdering even when applied thinly.
3. Polishing Putty (Imitation Porcelain Coating): It can improve surface film-forming properties, making the coating surface denser, harder, glossier, and more scrub-resistant. Only one kilogram per ton of putty is needed to achieve significant results.
4. Neutral Interior Wall Putty: Adding 6 kg of polyvinyl alcohol powder and an appropriate amount of cellulose (hydroxypropyl or carboxymethyl) to one ton of heavy calcium carbonate yields a high-quality putty powder far superior to starch-based and 821-type putty powders. This putty has a hardness between that of gray calcium-based and starch-based putty, exhibiting excellent workability, adhesion, flexibility, sanding smoothness, and durability far exceeding those of the other two types. When combined with gypsum powder and retarding technology, an even higher-grade, excellent home decoration putty powder can be obtained. This type of putty powder has a long service life and excellent decorative effect, and will become the future development direction of the putty industry.
5. In instant adhesive powder, it is the main binder. Combined with an appropriate amount of hydroxypropyl methylcellulose and supplemented with a suitable amount of thickening and complexing agents, it produces a convenient, environmentally friendly, high-strength adhesive powder that can be mixed with cement and gypsum for wet wall leveling and can also be applied alone with double-flying powder without powdering.
6. In dry mortar, PVA1788 powder exhibits excellent film-forming properties. When used in combination with cellulose ether water-retaining agents, it improves the flexibility and water retention of various cement mortars and gypsum building materials, enhances mortar bonding strength, and effectively prevents peeling, cracking, and hollowing.
Other Applications
Thin-layer adhesives, flexible adhesives, mineral plasters, cement additives, PVC latex, rewetting adhesives, office pastes, cosmetics, screen printing photosensitive films, coated paper coating agents, zinc plate printing photosensitive films, long-fiber yarn sizing agents, and additives for oil well cement.
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