Test method for viscosity of RDP Redispersible Latex Powder

Test method for viscosity of RDP Redispersible Latex Powder

At present, the most widely used RDP redispersible latex powder in the world is vinyl acetate and ethylene copolymer rubber powder, ethylene and vinyl chloride and vinyl laurate ternary copolymer rubber powder, vinyl acetate and ethylene and higher fatty acid vinyl ester ternary copolymer rubber. Powder, these three redispersible latex powders dominate the entire market, especially the vinyl acetate and ethylene copolymer rubber powder VAC/E, occupying a leading position in the global field, and represent the technical characteristics of redispersible latex powder . From the technical experience of polymers applied in mortar modification, it is still the best technical solution:

1. It is one of the most used polymers in the world;

2. It has the most application experience in the construction field;

3. It can meet the rheological properties required by the mortar (that is, the required construction);

4. With other monomers The polymer resin has the characteristics of low organic volatile matter (VOC) and low irritant gas;

5. It has the characteristics of excellent UV resistance, good heat resistance and long-term stability;

6. It has high saponification resistance;

7. It has the most Wide glass transition temperature range (Tg);

8. It has relatively excellent comprehensive bonding, flexibility and mechanical properties;

9. It has the longest chemical production experience on how to produce stable quality products and the experience of maintaining storage stability;

10 , Very easy to combine with the performance of protective colloid (polyvinyl alcohol).

The detection method of the adhesive strength of the redispersible latex powder is characterized in that the measurement methods are as follows:

1. First take 5g of redispersible latex powder into a glass measuring cup, add 10g of purified water and stir for 2min to make it evenly mixed;

2. Then, after the mixed measuring cup is allowed to stand for 3 minutes, stir again for 2 minutes;

3. Then apply all the solution in the measuring cup to a clean glass plate placed horizontally;

4. Put the glass plate into the DW100 low temperature environment simulation test box;

5. Finally, let it stand for 1 hour under the environment simulation condition of 0°C, take out the glass plate, test the film forming rate, and calculate the standard adhesive strength of the redispersible latex powder in use according to the film forming rate.