Hydroxypropyl methyl cellulose ether for dry mixed ready mixed mortar

In dry mixed ready mixed mortar, the content of HPMCE is very low, but it can improve the performance of wet mortar. Reasonable selection of cellulose ether with different varieties, different viscosity, different particle size, different viscosity degree and addition amount has influence on the performance of dry mortar. At present, many masonry and plastering mortar water retention performance is not good, a few minutes will appear a little static water slurry separation. Water retention is an important property of Methyl cellulose ether, which is also concerned by many dry mortar manufacturers in China, especially in the south where the temperature is higher. The factors affecting the water retention of dry mortar include the amount of cellulose ether HPMC, the viscosity of cellulose ether HPMC, the fineness of the particles and the temperature of the environment. Cellulose ether is a kind of synthetic polymer made from natural cellulose by chemical modification. The water-soluble cellulose ether plays an important role in mortar in three aspects, one is the excellent water-holding capacity, the other is the influence on mortar consistency and thixotropy, and the third is the interaction with cement. The water-retaining function of cellulose ether depends on the water absorption of the base, the composition of mortar, the thickness of mortar, the water demand of mortar and the setting time of the setting material. The water retention of cellulose ether itself comes from the solubility and dehydration of cellulose ether itself.