In hydroxyethyl methyl cellulose, the introduction of methoxy groups reduces the surface energy of the aqueous solution containing hydroxyethyl methyl cellulose, so that hydroxyethyl methyl cellulose has an air-entraining effect on cement mortar. Introducing appropriate air bubbles into the mortar improves the construction performance of the mortar due to the "ball effect" of the air bubbles. At the same time, the introduction of air bubbles increases the output rate of the mortar. Of course, the amount of air-entrainment needs to be controlled. Too much air-entrainment will have a negative impact on the strength of the mortar. Hydroxyethyl methyl cellulose will delay the setting process of cement, thereby slowing down the setting and hardening process of cement, and prolonging the opening time of mortar accordingly, but this effect is not good for mortar in colder regions.
As a long-chain polymer substance, hydroxyethyl methylcellulose can improve the bonding performance with the substrate after being added to the cement system under the premise of fully maintaining the moisture in the slurry.
|Chemical name||Hydroxyethyl Methyl Cellulose|
|Synonym||Cellulose ether, 2-hydroxyethyl methyl cellulose, Cellulose, 2-hydroxyethyl methyl ether, Methyl hydroxyethyl cellulose, HEMC, MHEC|
|Product Grade||HEMC MH200M|
|Solubility||Water Soluble Cellulose ether|
|Physical form||White to off-white cellulose powder|
|Viscosity Brookfield 2% solution||Min70000 mPa.s|
|Viscosity NDJ 2% solution||160000-240000mPa.S|
|Mesh size||99% pass 100mesh|
KimaCell® HEMC MH200M hydroxyethyl methyl cellulose function in in cement mortar are water retention, thickening, air entrainment, retardation and improvement of tensile bond strength, etc. These functions correspond to the considerations that need to be considered when examining and selecting HEMC The HEMC viscosity, water retention, open time and other aspects. When choosing HEMC in different mortar products, the performance requirements of HEMC should be put forward according to the construction and use requirements of specific mortar products, and the appropriate HEMC should be selected in combination with the composition and basic index parameters of HEMC.
The main factors affecting the application performance of hydroxyethyl methylcellulose are viscosity, water retention and open time.