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What is the function of dispersing latex powder?

January 7, 2022by admin0

What is the function of dispersing latex powder?

Since dry powder does not need to consider emulsion formulation and stability issues like polymer emulsions, a small amount of mixing can make the mortar achieve the required performance, and it is easier to package, store, transport and supply than emulsions, and is resistant to freezing and mildew. The problem of bacterial growth, and the advantage that it can be combined with ready-mixed packaging such as cement and sand to make a one-component product, and it can be used with water. In application, pre-mix and package the sand, cement, dry emulsion powder and other auxiliary additives. During on-site construction, only a certain amount of water is needed to make a dry mortar with better performance.

The core of the production of dry emulsion powder is that the polymer particles after the re-dispersion of the latex powder present a particle size or particle size dispersion similar to the original emulsion polymer particles. A certain amount of protective colloids such as polyvinyl alcohol should be added to the emulsion, so that the latex powder can be re-dispersed into an emulsion when it comes in contact with water. Only when the latex powder has good dispersibility can it ensure the best effect. . The dispersible latex powder is usually white powder. Its ingredients include:

Polymer resin: Located in the core part of the rubber powder particles, it is also the main component of the redispersible latex powder.

Additives (internal): together with the resin, it can modify the resin.

Additives (external): In order to further expand the performance of redispersible latex powder, another material is added.

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.

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