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Increase the water retention effect of hydroxypropyl methyl cellulose

January 20, 2022by admin0

Hydroxypropyl methyl cellulose in dry mortar, increase the amount of cellulose ether is very low, but can improve the wet mortar obvious function, construction function is a main agent mortar. Now, using hydroxypropyl methyl cellulose in dry mortar cellulose ether is hydroxypropyl methyl cellulose ether (HPMC). Hydroxypropyl methyl cellulose in dry mortar HPMC first play water, thickening, improving the construction function. Hydroxypropyl methyl cellulose HPMC does not participate in any chemical reaction, only the adjuvant action. Putty powder in water, on the wall, is a chemical reaction, the formation of new substances, the upper wall putty powder down from the wall, ground into powder, then, can not, because now constitute a new substance (calcium carbonate). The first component is: Ca (OH) is a mixture of 2, CaO and a few CaCO3, CaO+H2O=Ca (OH) 2 – Ca (OH) 2+CO2=CaCO3 ↓ +H2O ash calcium in the water and the air under the action of CO2, to produce calcium carbonate, and HPMC just water, help calcium very good response, its own did not participate in any repercussions.

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