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Cellulose ether (CE) is a natural additive found in many building materials as thickeners, binders, film formers, and water-retention agents. Methyl cellulose (MC), methyl hydroxyethyl cellulose (MHEC/HEMC), and methyl hydroxypropyl cellulose (MHPC/HPMC) are the most common cellulose ethers used as admixtures in building materials.

Water retention is an important property of cellulose ether, and it is also a concern of many domestic drymix mortar manufacturers, especially those in the south area with high temperature. Factors that affects the water retention effect of the mortar include the amount of Hydroxypropyl Methylcellulose,

In the dry mortar, cellulose ether plays the role of retaining water, thickening and improving construction performance. Good water retention performance ensures that the mortar will not be sanded, dusting and strength due to lack of water, cement hydration incompleted, thickening effect makes the structural strength of the wet mortar greatly enhanced.

Factory-made mortars have been mostly implemented as masonry renderings, fixing tiles, self-levelling floors and so on. When mortar is applied on substrate, water may be absorbed by the substrate. This phenomenon can induce insufficient hydration of cement, and thus decrease mechanical properties of the mortar.

The HPMC mainly plays a role in water retention and thickening, able to effectively improve the bond force and sag resistance of slurry.

There are different types of viscometers used to measure the viscosity of a cellulose ether solution. The widely adopted viscometers are: HoppIer falling ball viscometer, Haake rotation Rheometer and Brookfield rotation viscometer. The viscometer commonly used in China is NDJ series.

Hydroxy Propyl Methyl Cellulose (HPMC) helps to significantly improve the water-holding capacity of mortar. Just a low level of hydroxy propyl methyl cellulose addition can lead to a significant improvement on the water retention rate of the mortar.

Self-Leveling Flooring Materials

1. Hydroxy Propyl Methyl Cellulose can provide the viscosity and can be used as anti-settling additives.

With the rapid development of the construction industry, people have increasing demands for new building materials. Due to the increase in people’s awareness of environmental protection and the continuous improvement of construction efficiency,