redispersible latex powder RDP for tile adhesivesDecember 7th 2023
With everyone’s use and understanding of hydroxypropyl methylcellulose, I believe many friends know that putty powder will basically be added to it now. Today we need to understand the role of putty powder using hydroxypropyl methylcellulose.
Thickening: It can thicken and suspend to make the solution uniform and anti-sagging.
Water retention: The putty powder dries slowly, and the auxiliary calcium reacts under the action of water.
Improve processability: Because the product has a lubricating effect, it can make the putty powder have a good structure. It does not participate in any chemical reaction, but only plays an auxiliary role. Putty powder adds water to the wall. It’s a chemical reaction. Due to the formation of a new substance, put the putty powder on the wall of the wall, grind it into a powder, and then use it because it has formed a new substance (calcium carbonate). )) The main components of ash calcium powder are: Ca(OH)2, CaO and a small amount of CaCO3 mixture, CaO + H2O = Ca(OH)2-Ca(OH)2 + CO2 = CaCO3 + water and carbon dioxide in the air to form carbonic acid The effect of calcium, while HPMC only retains water to help ash calcium react better, and it has not participated in any reaction itself.