Several preliminary identification methods for Vae Redispersible Powder for Building Material

 VAE Re-dispersible Polymer Powder , as a powder adhesive, is widely used in the construction industry. The quality of dispersible latex powder is directly related to the quality and progress of construction. With the rapid development of the domestic building energy-saving market With the development of VAE Re-dispersible Polymer Powder products, more and more companies have entered into the research and development and production of VAE Re-dispersible Polymer Powder products, and users have more and more choices. However, at the same time, the quality of dispersible latex powder has become mixed, with good and bad mixed. In addition, in order to reduce costs, some manufacturers ignore quality standards and pass off inferior products as high-quality products. Some even pass off fake products as genuine, using general resin powder and selling it at low prices under the guise of redispersible latex powder. This not only disrupts the market but also deceives the market. consumer.

How to identify the quality of Redispersible latex powder ? Here are some preliminary methods for identifying the quality of redispersible latex powder:

1. Judging from the appearance: Use a glass rod to cover a small amount of redispersible latex powder thinly and evenly on the surface of a clean glass plate. Place the glass plate on white paper and visually inspect the particles, foreign matter and coagulation. Exterior. The appearance of the redispersible latex powder should be white free-flowing uniform powder with no irritating smell. Symptoms of quality problems: latex powder has abnormal color; contains impurities; rough particles; pungent odor;

2. Judgment by dissolution method: Dissolve a certain amount of vae copolymer rdp powder in 5 times the mass of water, stir thoroughly and let it stand for 5 minutes before observing. In principle, the less insoluble matter that settles to the bottom layer, the better the quality of the dispersible latex powder;

3. Judgment from ash content: Take a certain amount of dispersible latex powder, weigh it, place it in a metal container, heat it to 800°C, burn it for 30 minutes, cool it to normal temperature, and weigh it again. The quality is relatively good for the light weight. Light weight and good quality. Analysis of the reasons for high ash content: improper raw materials and high inorganic content;

4. Use the film-forming method to judge: Film-forming property is the basis for mortar modification properties such as bonding. Poor film-forming property is usually caused by excessive addition of inorganic components or improper organic components. Good-quality redispersible latex powder has good film-forming properties at room temperature. Those with poor film-forming properties at room temperature mostly have quality problems with the polymer or ash content.

Test method: Take a certain mass of dispersible latex powder, mix it with water at a ratio of 1:1, stir well and let it sit for 2 minutes. Stir well again. Pour the solution onto a piece of clean glass that is laid flat, and place the glass in a ventilated and shaded place. After it is fully dry, peel it off. Observe the peeled off polymer film. High transparency and good quality. Then pull it moderately, good elasticity is good quality. Then cut the film into strips, soak it in water, and observe it after 1 day. The ones that are less dissolved by water are of better quality.

The above is just a simple method and cannot completely identify good or bad, but it can make a preliminary identification. Add rubber powder to the mortar according to the instructions for use, and test the mortar according to the corresponding mortar standards. This method is more objective.