The performance of redispersible polymer powder in tile adhesive

Due to the formation of an interpenetrating network structure between the polymer and the mortar, a continuous polymer film is formed in the pores, which enhances the bonding between aggregates and blocks some of the pores in the mortar. Therefore, the performance of the modified mortar after hardening is significantly improved compared to that of the cement mortar.

The performance of redispersible polymer powder in putty,mortar and tile adhesive

In interior and exterior wall putty powder, tile adhesive, tile grouting agent, dry powder interface agent, exterior wall external insulation mortar, self-leveling mortar, repair mortar, decorative mortar, waterproof mortar and external insulation dry-mixed mortar, etc., the polymer is added to improve the weaknesses of traditional cement mortar such as brittleness and high elastic modulus, and to endow the cement mortar with better flexibility and tensile bond strength, so as to resist and delay the generation of cracks in the cement mortar. Due to the formation of an interpenetrating network structure between the polymer and the mortar, a continuous polymer film is formed in the pores, which strengthens the bond between the aggregates and blocks some of the pores in the mortar. Therefore, the performance of the modified mortar after hardening is greatly improved compared with the cement mortar.

The main functions of the redispersible polymer powder in putty are as follows:

1、Improve the adhesion and mechanical properties of putty. The redispersible polymer powder is a powder adhesive made by spray drying a specially formulated emulsion (high molecular polymer). This powder can quickly re-disperse into an emulsion upon contact with water, and it retains the same properties as the initial emulsion, that is, it can form a film upon evaporation of water, and this film has high flexibility, high weather resistance and high adhesion to various substrates. Additionally, the redispersible polymer powder with hydrophobic properties can make the mortar have excellent waterproofing performance.

2、Improve the cohesion of the putty, enhance its excellent resistance, alkali resistance, wear resistance, and increase the impact strength.

3 、Improve the waterproofing and permeability of the putty.

4 、Improve the water retention property of the putty, extend the curing time, and improve the workability.

5 、Improve the impact resistance of the putty and enhance its durability.

The main functions of the redispersible polymer powder in the mortar are as follows:

1 、Improve the compressive strength and flexural strength of the mortar.

2 、The addition of redispersible polymer powder enhances the elongation rate of the mortar, thereby improving its impact resistance and also endowing the mortar with excellent stress dispersion properties.

3 、The bonding performance of the mortar has been improved. The bonding mechanism relies on the adsorption and diffusion of macromolecules on the bonding surface. At the same time, the rubber powder has certain permeability and, together with the cellulose ether, fully wets the surface of the base material, making the performance of the base material close to that of the newly plastered surface, thereby enhancing the adhesion and significantly improving the performance.

4 、Reduce the elastic modulus of the mortar, enhance the deformation capacity, and minimize cracking phenomena.

5 、Improve the wear resistance of the mortar. The improvement of wear resistance mainly lies in the presence of a certain amount of cementitious substances on the surface of the mortar. The cement powder plays a bonding role, and the network structure formed by the cement powder can pass through the pores and cracks in the cement mortar. This improves the adhesion between the base material and the cement hydration products, thereby enhancing the wear resistance.

6 、Improve the mortar with excellent alkali resistance.

The main functions of the redispersible polymer powder in the tile adhesive are as follows:

1、As the amount of cement increases, the original bonding strength of the tile adhesive also increases. At the same time, the tensile bonding strength after water immersion and the tensile bonding strength after thermal aging also increase accordingly. The amount of cement should be above 35%.

2、As the amount of redispersible polymer powder increases, the tensile bond strength of the tile adhesive after being immersed in water and the tensile bond strength after thermal aging both increase, but the increase in the tensile bond strength after thermal aging is more significant.

3、As the amount of cellulose ether increases, the tensile bonding strength of the tile adhesive after thermal aging increases, and the tensile bonding strength after water immersion first increases and then decreases. The best effect is achieved when the content of cellulose ether is around 0.3%.

Therefore, when using the redispersible polymer powder, it is important to pay attention to the amount used, so as to truly achieve its effect.