mortar additive hpmcMay 11th 2023
Redispersible latex powder is a water-soluble white or white flowable powder copolymer of ethylene and vinyl acetate. It uses polyvinyl alcohol as a protective colloid. It is commonly used in cement, gypsum, and mortar. It is redispersible Latex powder has outstanding waterproof performance, good bonding strength, increases the elasticity of the mortar and has a longer open time, imparts excellent alkali resistance to the mortar, and improves the adhesion, flexural strength, plasticity and wear resistance of the mortar And outside construction, it has stronger flexibility in the flexible anti-cracking mortar.
The redispersible latex powder can be quickly re-dispersed into an emulsion after contact 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 This kind of substrate has high adhesion.
Waterproof of redispersible latex powder
I have to mention here that because redispersible latex powders have high bonding ability and unique properties, such as: water resistance, construction and heat insulation, etc., their application range is extremely wide, except for the cement mentioned above. , Gypsum, mortar can also be applied to tile adhesives, dry powder putty, caulking cement, insulation building materials, etc.
Let me talk about the water resistance of the redispersible latex powder again. The water-repellent latex powder can make the mortar have good water resistance. Redispersible latex powder is used in mortar to improve the brittleness and high elastic modulus of traditional cement mortar, and to give cement mortar better flexibility and tensile bond strength to resist and delay The occurrence of cement mortar cracks, because the polymer and the mortar form an interpenetrating network structure, a continuous polymer film is formed in the pores, which strengthens the bonding between the aggregates and blocks some pores in the mortar. The performance of the cement mortar is greatly improved.