Polyvinyl alcohol (PVA) is an important multifunctional polymer material in the construction industry, playing a key role mainly through the following applications:

 

Modifier for Cement Mortar

As an additive incorporated into cement mortar, PVA can significantly enhance the material's adhesion, flexibility, and crack resistance. After its aqueous solution combines with the hydration products of cement, a polymer film network is formed inside the mortar, strengthening the internal cohesion and reducing the risk of shrinkage and cracking. It is especially suitable for thin-layer construction, repair projects, and self-leveling mortar.

Core Component of Building Adhesives

Due to its excellent bonding properties, PVA is widely used in the preparation of environmentally friendly building adhesives. The modified PVA adhesives can be applied in scenarios such as tile laying, wood bonding, and gypsum board joint treatment. They have the characteristics of strong initial adhesion and good stability after curing.

Interface Treatment Material

As a main component of the concrete base treatment agent, PVA can effectively seal the pores of the base layer and enhance the adhesion between subsequent coatings, putties, and the base surface. Its film-forming property can also be used as a temporary form release agent for formwork, improving the surface finish of the concrete.

Applications of Environmental Protection Properties

PVA materials have the characteristics of water solubility and biodegradability, demonstrating environmental protection advantages in temporary building components (such as water-soluble packaging films) and low-VOCs coatings, which is in line with the development needs of green buildings.

 

In addition, PVA can also be used to prepare thickeners for building coatings, reinforcing agents for gypsum products, etc. With its high cost-effectiveness and strong construction adaptability, PVA continues to play an important role in modern construction projects.