Advantages of HPMC in Construction Materials
December 26th 2024
Redispersible latex powder refers to a polymer emulsion made by spray drying and subsequent processing. It is mainly used in construction, especially in dry mortar, which can increase cohesion, adhesion and flexibility. .
Composition of redispersible latex powder: Redispersible latex powder is usually white powder, but there are a few other colors.
The components of redispersible latex powder include:
Polymer resin: Located in the core part of the rubber powder particles, it is also the main component of the redispersible latex powder. Such as ethylene-vinyl acetate (EVA), polyacrylate (PAE), etc.
Additives (internal): play the role of modifying the resin, such as plasticizers can reduce the film-forming temperature of the resin, usually ethylene-vinyl acetate copolymer resin does not need to add plasticizers, and not every latex powder needs additives ingredient.
Additives (external): In order to further extend the performance of the redispersible latex powder, additional materials are added, such as the addition of super-alkali water agent. Dispersed latex powders all contain this type of additive.
Protective colloid: A layer of hydrophilic material wrapped on the surface of redispersible latex powder particles. Most of the protective colloids of redispersible latex powder are polyvinyl alcohol.
Anti-caking agent: fine mineral filler, mainly used to prevent rubber powder from agglomerating during storage and transportation and to facilitate the flow of rubber powder (pour out from paper bags or tankers)
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