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Hydroxypropyl methyl cellulose is a kind of nonionic cellulose ether, which is made from natural plant macromolecular cellulose through a series of chemical processing. It is an odorless, tasteless, non-toxic white powder. Soluble in cold water and organic mixtures.

Hydroxypropyl methyl cellulose HPMC can be widely used in concrete, brick wall, block, gypsum wallboard, cement board and other substrate surface and ceramic tile, floor tile, wall brick, Mosaic, marble, culture stone and other direct paste materials.

Hydroxypropyl methyl cellulose is generally used in degreasing coating/wall putty with a viscosity of 100,000, while cement mortar has relatively high requirements for viscosity, and it is better to choose a viscosity of 150,000. The most important role of hydroxypropyl methyl cellulose is water retention, followed by thickening.

In ready-mixed mortar, the addition of cellulose ether is very low, but it can significantly improve the performance of wet mortar, which is a major additive affecting the construction performance of mortar. the important role of HPMC in mortar is mainly in three aspects, one is the excellent water retention capacity, the second is the effect on mortar consistency, and the third is the interaction with cement.

High water retention can make cement fully hydrated, significantly increase bond strength, and can appropriately improve tensile strength and shear strength, greatly improve the construction effect, improve work efficiency.

Hydroxypropyl Methyl Cellulose (HPMC), as the main additive in building dry mixed mortar products, plays a key role in the performance and cost of dry mixed mortar.

Hydroxypropyl Methyl Cellulose is a non-ionic cellulose ether made from refined cotton and processed through a series of chemical reactions. It is an odorless, non-toxic white powdery substance that dissolves in water and presents clear or slightly cloudy colloidal solution.

The five indexes are hydroxypropyl content, methoxy content, viscosity, moisture and ash content. The ratio of hydroxypropyl content to methoxy content should be appropriate, the water retention will be good, not just which index is high. Viscosity: When the viscosity is less than 100,000,

In the ready-mixed mechanical spraying mortar, the addition of hydroxypropyl methyl cellulose ether is very low, but can significantly improve the performance of wet mortar, mortar construction performance is a major additive. Reasonable selection of cellulose ether with different varieties, different viscosity, different particle size, different viscosity degree and addition amount has a positive effect on the improvement of dry mortar properties.