Analysis on the properties and functions of redispersible latex powder

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Analysis on the properties and functions of redispersible latex powder

The Redispersible latex powder product is a water-soluble redispersible powder, which is a copolymer of ethylene and vinyl acetate, and uses polyvinyl alcohol as a protective colloid. Due to the high binding ability and unique properties of dispersible polymer powders, such as water resistance, workability and thermal insulation, their application range is extremely wide. Redispersible latex powder is mainly used in: internal and external wall putty powder, tile adhesive, tile grout, dry powder interface agent, external thermal insulation mortar, self-leveling mortar, repair mortar, decorative mortar, waterproof mortar, etc. in dry mortar.

Redispersible latex powder is a green environmental protection, building energy-saving, high-quality multi-purpose powder building material, and an essential and important functional additive for dry-mixed mortar. It can improve the properties of mortar, improve the strength of mortar, improve the bonding strength of mortar and various substrates, improve the flexibility and workability of mortar, compressive strength, flexural strength, abrasion resistance, toughness, adhesion Relay and water retention capacity, constructability. In addition, the latex powder with hydrophobicity can make the mortar have good water resistance.

The role of redispersible latex powder:

1. The redispersible latex powder is dispersed into a film and acts as a reinforcing agent as the second adhesive;

2. The protective colloid is absorbed by the mortar system (it will not be destroyed by water after film formation, or “secondary dispersion”;

3. The film-forming polymer resin is distributed in the entire mortar system as a reinforcing material, thereby increasing the cohesion of the mortar; Redispersible latex powder is a powder binder made of special emulsion (polymer) after spray drying. This powder can be quickly redispersed to form an emulsion after contacting with water, and has the same properties as the initial emulsion, that is, a film can be formed after the water evaporates. This film has high flexibility, high weather resistance and resistance to various High adhesion to substrates.