Re-Dispersible Polymer Powder Rdp for Construction Chemicals Tile AdhesiveDecember 5th 2023
SLEOCHEM is live show for our chemical products now. The water retention of methyl cellulose ether at high temperature is an important indicator to distinguish the quality of methyl cellulose ether. Factors such as temperature, temperature and air pressure rate affect the evaporation rate of water in cement mortar and gypsum-based products.
Therefore, the water retention effect of adding equal amount of HPMC products varies in different seasons. In concrete construction, the water retention effect of the slurry can be adjusted by increasing the amount of HPMC added. Excellent hydroxypropyl methyl cellulose HPMC can effectively solve the problem of high temperature water retention.
High quality HPMC cellulose can be uniformly and effectively dispersed in cement mortar and gypsum products, and wrap all the solid particles and form a film wetting, medium water in a considerable period of time gradually released, hydration and inorganic cementitious materials, so to ensure the bond strength and compressive strength of the material. The uniformity of HPMC is very good, methoxy and hydroxypropoxy along the cellulose chain distribution, it can improve the oxygen atom on the hydroxyl and ether bonds and water molecules can form hydrogen bonds, free water bonding thus effectively control the evaporation of water due to high temperatures in the weather, to achieve high water retention.
Therefore, in the summer high temperature construction, in order to achieve the effect of water conservation, it should be added in accordance with the formula of sufficient high-quality HPMC products, otherwise there will be insufficient moisture, insufficient strength caused by excessive drying. Quality problems such as reduction, cracking, hollow drum and loss also increase the difficulty of the construction workers. As the temperature decreases, the amount of HPMC can gradually reduce the amount of HPMC can achieve the same water retention effect.