Latex powder can enhance the water retention of the material, prevent the cement mortar from hardening, drying and cracking too fast; increase the plasticity of the mortar and improve the construction workability. If you want to do the experiment, you should re-test the mortar according to the ratio and see it. Dispersibility, film formation, flexibility (including drawing test, whether the original strength is acceptable), the results can be obtained after 10 days.
The ash from the regular factory is generally 10±2
The ash standard is less than 12%, and the quality and price are year-on-year.
There are 30% of domestic latex powder, and even some of the rubber powder has reached 50%.
Nowadays, the quality and price of dispersible polymer powder on the market are uneven. Try to choose a source with low ash, high cost performance and relatively stable quality.
How to choose a
Redispersible Powder, it is really impossible to start when formulating.
There is no effective way to put in the experiment.
The selection of suitable dispersible polymer powder should be considered from the following aspects:
1. The glass transition temperature of the redispersible powder.
The glass transition temperature means that the polymer exhibits elasticity; below this temperature, the polymer exhibits brittleness.
Generally, the glass transition temperature of latex powder is -15±5°C, and the index of latex powder of regular manufacturers is basically no problem.
Glass transition temperature is a major indicator of the physical properties of dispersible polymer powders. For specific products,
Reasonable selection of the glass transition temperature of the redispersible latex powder is beneficial to enhance product flexibility and avoid cracking and other problems.
2. The minimum film forming temperature can be redispersed and the
Redispersible Polymer Powder and water are mixed and emulsified to have similar properties to the original emulsion.
That is, the film is formed after evaporation of water, the film has high flexibility, and the adhesion to various substrates is very good.
The minimum film forming temperature of latex powder produced by different manufacturers will be somewhat different. Some manufacturers have an index of 0 °C.
Some manufacturers' indicators are 5 ° C, as long as the quality of the latex powder film formation temperature is between 0 ~ 5 ° C.
3. Resolubility.
The inferior dispersible polymer powder is partially dissolved or difficult to dissolve in cold water or alkaline water.
4. Aqueous solution of latex powder In order to test the viscosity of the redispersible latex powder, some customers simply dissolved the latex powder into water and stirred it, and then tested it by hand. It was found that there was no stickiness, which was not true latex powder.
In fact, the redispersible latex powder itself is not sticky, it is a powder formed by spray drying of polymer emulsion.
When the dispersible polymer powder and water are mixed and emulsified, it has the same properties as the original emulsion, that is, the film formed by evaporation of water has high flexibility and adhesion to various substrates is very good.
It can also enhance the water retention of the material and prevent the cement mortar from hardening, drying and cracking too quickly;
Increase the plasticity of the mortar and improve the construction workability. If the experiment is to be carried out, the mortar should be retested in proportion to see its dispersibility, film formation and flexibility (including the drawing test,
Whether the original strength is acceptable or not) The results can be obtained after 10 days in general.
Puyang Ruidaxu New Materials Company Ltd is a leading enterprise producing Redispersible polymer powder, Cellulose Ethers,PP Fiber ,superplasticizer in China. Factory was established 2004 year and has got ISO quality certificate and ISO environment protection certificate,and were a unit for carbon negutrality commitment demonstration.
Puyang Ruidaxu New Materials Company Ltd
October 10, 2023
