Redispersible powder and vinyl acetate ethylene (VAE) are both related to the construction and building materials industry, particularly in the field of mortar and concrete additives. Here's the relationship between them:

1. Redispersible Powder:
- Redispersible powders are typically polymer powders that can be dispersed in water to form a film or adhesive. They are commonly used in construction as additives in cement-based products like mortars, tile adhesives, and self-leveling compounds.
- These powders are created by spray-drying a mixture of polymer binders, usually vinyl acetate ethylene (VAE) copolymers, along with other additives such as plasticizers, anti-foaming agents, and dispersants.
- Redispersible powders improve the performance of construction materials by enhancing their adhesion, flexibility, and workability. They also contribute to water retention and reduce shrinkage and cracking in mortar and concrete applications.
- When mixed with water, redispersible powders form a stable emulsion, and the VAE copolymer becomes re-dispersed, allowing it to act as a binder in the construction material.

2. Vinyl Acetate Ethylene (VAE):
- VAE is a copolymer consisting of vinyl acetate and ethylene monomers. It is a widely used polymer in the construction industry because of its excellent adhesive properties, flexibility, and water resistance.
- VAE is a key component of redispersible powders used in construction applications. It serves as the polymer binder that provides the adhesive and cohesive properties to the mortar or concrete when the powder is re-dispersed in water.
- The ethylene content in the VAE copolymer contributes to its improved water resistance and durability compared to pure vinyl acetate polymers.

The relationship between redispersible powder and vinyl acetate ethylene is that VAE copolymers are a fundamental component of redispersible powders. These powders, when mixed with water, allow the VAE copolymer to re-disperse and act as a binder in construction materials, enhancing their performance and properties. Redispersible powders are essential additives in the construction industry for improving the quality of mortar and concrete formulations.