hpmc viscossity effect the water retention
Welcel HPMC substantially reduces the loss of water into absorbing substrates in formulations likecement renders,tile cements,gypsum plasters,etc.
The water retention ability of Welcel HPMC also strongly enhances the adhesion strength of thin-bed mortars.This is because the binders in the mortar such as the cement and gypsum have enough time for hydration and the same time do not lose water.
From the graph on the above,we can see thatthe water retention isstrongly correlated to the viscosity levels. When the addition rate of Welcel HPMC reachesa high dosage,the difference in waterretention among different viscosity gradesdecreases.