mortar additive hpmcMay 11th 2023
The main use of redispersible latex powder
The redispersible latex powder product is a water-soluble white or almost white flowable powder, a copolymer of ethylene and vinyl acetate, and polyvinyl alcohol as a protective colloid. A copolymer of esters with polyvinyl alcohol as a protective colloid.
Redispersible latex powder is green, environmentally friendly, building energy-saving, and high-quality multi-purpose powder building material. It is an essential functional additive for dry-mixed mortar.
Because the redispersible latex powder has high bonding ability and unique properties, such as: water resistance, construction and heat insulation, etc.
Therefore, their application range is extremely wide. It can improve the performance of the mortar, increase the strength of the mortar, increase the bonding strength of the mortar and various substrates, and increase the flexibility and variability of the mortar, compressive strength, flexural strength, abrasion resistance, toughness, adhesion Relay and water retention capacity, constructability. In addition, the water-repellent latex powder can make the mortar have good water resistance.
Redispersible latex powder main uses: tile adhesive, external wall external thermal insulation system bonding mortar, external wall external thermal insulation system plastering mortar, tile jointing agent, self-flowing cement mortar internal and external wall flexible putty flexible anti-cracking mortar , Rubber powder polystyrene particle thermal insulation mortar dry powder coating. Redispersible latex powder function and characteristics: Redispersible latex powder increases the bubble volume of foamed concrete, and at the same time, plays a role of lubrication, and protects the affinity of the colloid for water when the redispersible latex powder is dispersed. The subsequent increase in the viscosity of the foamed concrete improves the cohesive force of the foamed concrete during the cast-in-place construction process, and prevents the foam from breaking due to disturbance. Therefore, the workability of the foamed concrete is greatly improved.
Redispersible latex powder production process:
1. The redispersible latex powder forms a film after being dispersed and acts as a second adhesive to play a strengthening role;
2. The protective colloid is absorbed by the mortar system (the film will not be destroyed by water or dispersed twice;
3. The film-forming polymer resin is distributed in the entire mortar system as a reinforcing material, thereby increasing the cohesion of the mortar; the redispersible latex powder is a special emulsion (high molecular polymer) made by spray drying Powder binder. 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 the substrate.