1. What are the functions of redispersible latex powder in mortar?
Answer: The redispersible latex powder is molded after dispersion and acts as a second adhesive to enhance the bond; the protective colloid is absorbed by the mortar system (it will not be said to be destroyed after molded. Or dispersed twice); molded polymerization The physical resin is distributed throughout the mortar system as a reinforcing material, thereby increasing the cohesion of the mortar.
2. What are the functions of redispersible latex powder in wet mortar?
Answer: Improve construction performance; improve fluidity; increase thixotropy and sag resistance; improve cohesion; prolong open time; enhance water retention;
3. What are the functions of redispersible latex powder after the mortar is cured?
Answer: increase tensile strength; enhance bending strength; reduce elastic modulus; increase deformability; increase material density; increase wear resistance; increase cohesive strength; Has excellent hydrophobicity (adding hydrophobic rubber powder).
4. What are the functions of redispersible latex powder in different dry powder mortar products?
01. Tile Adhesive
① Effect on fresh mortar
A. Extend the working time and adjustable time;
B. Improve the water retention performance to ensure the water splash of the cement;
C. Improve sag resistance (special modified rubber powder)
D. Improve workability (easy to construct on the substrate, easy to press the tile into the adhesive).
② Effect on hardened mortar
A. It has good adhesion to various substrates, including concrete, plaster, wood, old tiles, PVC;
B. Under various climatic conditions, it has good adaptability.
02. External wall insulation system
① Effect on fresh mortar
A. Extend the working hours;
B. Improve the water retention performance to ensure the hydration of cement;
C. Improve workability.
② Effect on hardened mortar
A. It has good adhesion to polystyrene board and other substrates;
B. Excellent flexibility and impact resistance;
C. Excellent water vapor permeability;
D. Good water repellency;
E. Good weather resistance.
03. Self-leveling
① Effect on fresh mortar
A. Assist in improving mobility;
B. Improve cohesion and reduce delamination;
C. Reduce bubble formation;
D. Improve surface smoothness;
E. Avoid early cracking.
② Effect on hardened mortar
A. Improve the crack resistance of self-leveling;
B. Improve the bending strength of self-leveling;
C. Significantly improve the wear resistance of self-leveling;
D. Significantly increase the bond strength of self-leveling.
04. Putty
① Effect on fresh mortar
A. Improve constructability;
B. Add additional water retention to improve hydration;
C. Increase workability;
D. Avoid early cracking.
② Effect on hardened mortar
A. Reduce the elastic modulus of mortar and increase the matching of the base layer;
B. Increase flexibility and resist cracking;
C. Improve powder shedding resistance;
D. Hydrophobic or reduce water absorption;
E. Increase the adhesion to the base layer.
05. Waterproof mortar
① Effect on fresh mortar:
A. Improve constructability
B. Increase water retention and improve cement hydration;
C. Increase workability;
② Effect on hardened mortar:
A. Reduce the elastic modulus of mortar and enhance the matching of the base layer;
B. Increase flexibility, resist cracking or have bridging ability;
C. Improve the density of mortar;
D. Hydrophobic;
E. Increase the cohesive force.
Post time: Mar-31-2023