Hydroxypropyl methylcellulose(HPMC) is easily soluble in cold water, but it will encounter difficulty in dissolving in hot water. But its gelation temperature in hot water is significantly higher than that of methyl cellulose. The solubility in cold water is also greatly improved compared with methyl cellulose.
Hydroxypropyl methylcellulose(HPMC) is stable to acid and alkali, and its aqueous solution is very stable in the range of pH=2~12. Caustic soda and lime water have little effect on its performance, but alkali can speed up its dissolution and slightly increase its viscosity.
Hydroxypropyl methylcellulose(HPMC) is stable to common salts, but when the concentration of salt solution is high, the viscosity of hydroxypropyl methylcellulose solution tends to increase.
Hydroxypropyl methylcellulose(HPMC) is an additive commonly used in dry powder mortar, and cellulose ether plays an important role in dry powder mortar.
After the cellulose ether in the mortar is dissolved in water, the effective and uniform distribution of the cementitious material in the system is ensured due to the surface activity, and the cellulose ether, as a protective colloid,”wraps” the solid particles and wraps them on the outer surface. Form a lubricating film, make the mortar system more stable, and also improve the fluidity of the mortar during the mixing process and the smoothness of the construction.
Landcel hydroxypropyl methylcellulose(HPMC) has good water retention and solubility. It has good adaptability in building additives. Viscosity range 300-70000cps. Wide range of uses and good performance.