Performance and function of redispersible latex powder

Time:2020-12-08 09:17

The redispersible latex powder product is water-soluble redispersible powder, which is a copolymer of ethylene and vinyl acetate, and polyvinyl alcohol is used as protective colloid. As redispersible latex powder has high bonding ability and unique properties, such as water resistance, workability and heat insulation, it is widely used. The redispersible latex powder is mainly used in various dry mixed mortars such as putty powder for internal and external walls, tile adhesive, tile jointing agent, dry powder interface agent, external thermal insulation mortar for external walls, self-leveling mortar, repair mortar, decorative mortar and waterproof mortar. Re-dispersible latex powder is a multi-purpose powder building material with environmental protection, building energy saving and high quality, and it is an essential and important functional additive for dry-mixed mortar. It can improve the performance, strength, bonding strength between mortar and various substrates, flexibility, mobility, compressive strength, flexural strength, wear resistance, toughness, adhesion, water retention and constructability of mortar. In addition, hydrophobic latex powder can make mortar have good waterproof property.

Function of redispersible latex powder;

1. The redispersible latex powder is dispersed to form a film and used as a second adhesive to play a reinforcing role;

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

3. The film-forming polymer resin is distributed in the whole mortar system as a reinforcing material, thus increasing the cohesion of the mortar; Re-dispersible latex powder is a kind of powder adhesive prepared by spray drying special emulsion (high molecular polymer). After contacting with water, the powder can be quickly redispersed to form an emulsion, which has the same properties as the initial emulsion, that is, a film can be formed after evaporation of water, which has high flexibility, high weather resistance and high adhesion to various substrates.