Chemical products show

What are the causes of acrylic binder particles or other impurities? Generally, when the filter bag breaks when the binder pressure filter is used, or the filter bag is not fine, then what are the requirements for filtration?
1, binder pressure filtration, it should always sample, visually check whether the binder is clear and transparent, with a scraper fineness test whether the fineness;
2. Before packing, we must strictly inspect the quality of the packaging drums, especially the recycling drums.
3, qualified packaging barrels should be placed in the warehouse to prevent influent or sand and dust;
4. Qualified binder must be packaged before it cools down. The lid should not be tightened immediately. Otherwise it will be transported when it is hot. The vat is easily deformed;
5, the size of the lid tightly, while the above must be covered with iron or plastic cover;
6, the appearance of clean and unblemished objects without any signs; label clear and tidy.
Recently, I have seen a lot of netizens discussing about the whitening of acrylic binder after adding water. Today we will analyze for you from a professional perspective:
In reality, the binder becomes apparently more opaque milky after adding water, in fact, this is a normal phenomenon. The micelles of the emulsion (binder) are dispersed in water, and at the same time form another structural molecular group with the H/O atoms of water. Directly with the water molecule, water is a special polar molecule, and the positive electrode of the molecule attracts the negative electrode of the adjacent molecule so that the molecules stick together. Sticking to another structural molecule group, in fact, the particle size of the molecule becomes coarser, which is why the appearance becomes more opaque.
From the outside, the emulsion dissolves in water. In fact, it only disperses in water. The molecular group of the binder depends on itself and the surface tension of water instead of directly dissolving, and when it dissolves, it is the diffusion of molecules instead of binding, such as sugar and edible salt.
What are the acrylic coating methods? Under normal circumstances you can spray, roll, brush and other methods, what are the specific reactions generated?
1. Polymerization: Acrylic acid and its esters are polymerized into block acrylic copolymers under the action of an initiator;
2, into the salt reaction: block acrylic copolymer copolymer with ammonia or organic amines to produce ammonium salts of block acrylic binder;
3. Polymer glass transition temperature: Amorphous or semi-crystalline polymers are called glass transitions from viscous or highly elastic (rubbery) to glassy (or vice versa) transitions.
In addition, the occurrence of a glass transition temperature near the midpoint is called the glass transition temperature. For the acrylic binder used for coating, the design of the glass transition temperature is very important. You must pay attention!