​Application of Instant Hydroxypropyl Methylcellulose Ether in Ready-Mixed Spraying Mortar

In the ready-mixed spraying mortar, the addition amount of hydroxypropyl methyl cellulose ether is very low, but it can significantly improve the performance of the wet mortar, and it is a main additive that affects the construction performance of the mortar. Reasonable selection of cellulose ether of different varieties, different viscosities, different particle sizes, different degrees of viscosity and added amounts will have a positive impact on the improvement of the performance of dry mix mortar. At present, many masonry and plastering mortars have poor water retention performance. Water retention is an important performance of hydroxypropyl methyl cellulose ether, and it is also a performance that many customers pay special attention to. Factors affecting the water retention effect of dry mix mortar include the amount of HPMC added, the viscosity of HPMC, the fineness of particles and the temperature of the use environment. Cellulose ether is a synthetic polymer made from natural cellulose through a series of chemical modifications.

HPMC for Wall Putty

The important role of water-soluble cellulose ether in mortar mainly has three aspects, one is excellent water retention capacity, the other is the influence on the consistency and thixotropy of mortar, and the third is the interaction with cement. The water retention effect of cellulose ether depends on the water absorption of the base layer, the composition of the mortar, the thickness of the mortar layer, the water demand of the 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.

In the ready-mixed spray mortar, hydroxypropyl methyl cellulose ether plays the role of water retention, thickening, delaying the hydration power of cement, and improving construction performance. Good water retention capacity makes cement hydration more complete, which can improve the wet viscosity of wet mortar and increase the bond strength of mortar. Therefore, cellulose ether is being widely used as an important additive in ready-mixed mortar.