The role of hydroxypropyl methyl cellulose in putty

Understand the role of hydroxypropyl methyl cellulose in putty powder. Redispersible latex powder has high bonding ability and unique properties, such as water resistance, workability and heat insulation. Therefore, their application range is still extremely wide. The redispersible latex powder can make the material have excellent water increase, increase the tensile strength and increase the bending strength. Generally, for hydroxypropyl methylcellulose, the main increase The three functions of thickening, adding water and construction, the editor below will give you a detailed introduction: Thickening effect: It can thicken cellulose and act as a suspension, so that the solution is evenly up and down and prevents sagging. Water addition: It can make the putty powder dry and assist calcium to react under the action of water. Construction method: Cellulose has a lubricating effect, so putty powder can be put into construction. Hydroxypropyl methylcellulose HPMC does not participate in any chemical reaction, only a minor role, CaO + H2O = Ca(OH)2-Ca(OH)2 + CO2 = CaCO3↓+ H2O as the main component of Ca(OH)2 , CaO and CaCO 3 in water and CO2 in the air form calcium carbonate and HPMC only water, assisting the better reaction of calcium and calcium, it does not involve (referring to, involving) any antioxidant. In addition, the most important function of hydroxypropyl methylcellulose HPMC is to retain water and then thicken. In putty powder, as long as the water retention is good, the viscosity is low. Of course, the higher the viscosity, the better the relative water retention. Above 100,000, viscosity has little effect on water retention.

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