Shandong Hearst Building Material Co.,ltd
We have strong financial strength, and introduced full set of production line with industry leading level from German. With foreign advanced technology production base and our research and development center, annual output of 22000tons,now we have become one of the biggest and trusted manufacturer of Redispersible polymer powder in China.
The company foucs on hard working, responsibility, insisting on using our service to satisfy every customer.
Technical data
| Technical Date |
HEARST RD 503M |
HEARST RD 760F |
HEARST RD 740H |
HEARST RD 745W |
| Polymer Base |
VAC/VAE |
VAC/VAE |
VAC/VAE |
VAC/VAE/AC |
| Protective Colloid |
Polyvinyl Alcohol |
Polyvinyl Alcohol |
Polyvinyl Alcohol |
Polyvinyl Alcohol |
| Solid Content |
≥ 99.0% |
≥ 99.0% |
≥ 99.0% |
≥ 99.0% |
| Ash Content(900ºC) |
11%±2 |
11%±2 |
11%±2 |
11%±2 |
| Stacking Density (g/L) |
450-550 |
450-550 |
450-550 |
450-550 |
| Average Particle Size(um) |
~80 |
~80 |
~80 |
~80 |
| PH Value |
7.0-9.0 |
7.0-9.0 |
7.0-9.0 |
7.0-9.0 |
| Tg(ºC) |
3 |
-8 |
15 |
-11 |
| MFFT (Minimum film-forming temperature) (ºC) |
0 |
0 |
4 |
0 |
Emulsion and RDP/Redispersible Polymer Powder(redispersible emulsion powder) can form high tensile strength and bond strength on different materials after film formation, and they are combined with inorganic binder cement as the second binder in mortar, cement and polymer play corresponding special features respectively, so that the performance of mortar can be improved. By observing the microstructure of polymer-cement composite material, it is concluded that the addition of redispersible emulsion powder can make the polymer film and become a part of the pore wall, and the mortar forms a whole through the internal force, which improves the cohesion strength of the mortar, and thus increases the failure stress and ultimate strain of the mortar. The long-term properties of redispersible emulsion powder in mortar were studied. It was observed by SEM that after 10 years, the microstructure of polymer in mortar still did not change, and it maintained stable bond, flexural and compressive strength and good hydrophobic properties. Wang Ziming et al. [11] studied the formation mechanism of the redispersible emulsion powder on the strength of the ceramic tile binder, and found that after the polymer dried into film, on the one hand, the polymer film formed a flexible connection between the mortar and the ceramic tile; on the other hand, in the newly mixed mortar, the polymer increased the gas content of the mortar and affected the formation and wettability of the surface. The polymer will also have a better effect on the hydration process and shrinkage of the cement in the binder, all of which will have a better help in improving the bond strength.
The addition of RDP/Redispersible Polymer Powder(redispersible latex powder) to mortar can significantly improve the bond strength with other materials, because the hydrophilic latex powder and the liquid phase of the cement suspension permeate into the pores and capillaries of the matrix, and the latex powder forms a film in the pores and capillaries and is firmly adsorbed on the surface of the matrix, thus ensuring a good bond strength between the cementing material and the matrix.
The optimization of latex powder on mortar performance is due to the fact that latex powder is a high polymer with polar groups. When latex powder is mixed with EPS particles, the non-polar chain segment of latex powder polymerization main chain will physically adsorb the non-polar surface of EPS. The polar groups in the polymer are oriented outward on the surface of EPS particles, making EPS particles change from hydrophobic to hydrophilic. Due to the modification effect of latex powder on the surface of EPS particles, the problem that EPS particles are easy to float when exposed to water and the stratification degree of mortar is large is solved. At this time, cement is added to mix, and the polar groups adsorbed on the surface of EPS particles interact with the cement particles and are closely combined, so that the workability of EPS insulation mortar is significantly improved. This is reflected in the EPS particles are easily wetted by cement slurry, and the binding force between the two is greatly improved.
RDP/Redispersible Polymer powder
1.0 What is RDP
RDP(Redispersible Polymer Powder/Redispersible Powder) or VAE is a water-soluble re-dispersible powder. It is a copolymer of ethylene and vinylacetate. It dissolves in water easily and forms emulsion quickly , RDP could offer strong adhesive and stretching force to improve the workability, flexibility and water-proofing of the materials.
This VAE Re-Dispersible Polymer Powder Used in construction uses polyvinylalcohol as a protective colloid. By adding landcel RDP, the performance of mortar with cement or gypsum can meet the needs of various constructions.
2.0 How to Choose RDP
VAE Re-Dispersible Polymer Powder (RDP)is produced by spray-drying and water-based
emulsion, mostly based on vinylacetate and acrylicacid, dissolves in water easily and quickly
forms emulsion.The main specification is as below, and Ash content , Film tempreture is the key properties.
3.0 How to use RDP(VAE)
Mainly used in ceramic tile adhesive, ceramic tile jointing agent, plastering gypsum, self-leveling mortar, grout material ceramic tile adhesive, bonding mortar exterior insulation system, exterior insulation system of plastering mortar, flexible interior and exterior wall putty, flexible anti-crack mortar, powder polystyrene particles insulation mortar, powder coating, insulation board, have higher request for flexible polymer mortar products.
Redispersible Polymer Powder 328
Produced by spray-drying special water-based emulsion. Mostly based on vinyl acetate-ethylene. Dissolves in water easily and quickly forms emulsion. Its chemical properties are the same as original emulsion competely. Excellent flexibility in low temperature.
It can glue together different substrates, reinforce mortar struture and provide excellent adhesion at cement or gypsum based dry mixed mortar substate interface.
Characteristic
--Better deformability
--Increased adhesion to a variety substrates
--Improved wetting of the substrate
--Higher flexural strength and flexibility
--Increased impact and abrasion resistance
--Higher durability and freeze thaw resistance
Application
--Tile adhesive/Tile grouts
−skim coat/ wall putty
−coating mortar for EIFS(external insulation finish system)
−adhesive mortar for EIFS(external insulation finish system)
−tile joint filler
−decoration mortar
−dry mixed mortar
Storage and Handling
should be stored in dry and cool environment
It's recommented to use within 6month
storage in high humidity and temperature will increase the risk of blocking
storage inder pressure should also be avoided
Do not stack pallets on top of each other
Practice care and caution to avoid explosivce conditions
Packing
Standard packing: 25kg/bag inner with PE bags
1*20'FCL: 14 tons with pallets or 17 tons without pallet
1*40'FCL: 28tons with pallets
Our Service
Free Samples
Technical Supports
Every batch of products will be tested to ensure its quality.
Quality Guarantee
Sample testing support.
Redispersible Polymer Powder is widely used in construction areas especially used in construction mortar. Throughout the mortar system and increase mortar cohesion. Powder Material with Green Environment Protection. Welcome to contact me and get long time cooperation
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