Application of hydroxypropyl methyl cellulose in putty powder

Today we lead you to understand hydroxypropyl methyl cellulose in putty powder , in general there is thickening, water retention and construction of three roles.


Thickening: cellulose can thicken the suspension, so that the solution to maintain uniform up and down the same role, anti - hanging.


Water retention: make putty powder dry slowly, assist ash calcium reaction under the action of water.


Construction: cellulose has lubricating effect, can make putty powder has good construction.


Hydroxypropyl methyl cellulose HPMC does not participate in any chemical reaction, only plays an auxiliary role.Putty powder adds water, go up wall, it is chemical reaction, because of the generation of new material, the putty powder on the wall gets down from the wall, grind into powder, reuse, not line up, because already formed new material (caco3).The main composition of ash calcium powder is: Ca(OH)2, CaO and a small amount of CaCO3 mixture, CaO+H2O=Ca(OH)2 -- Ca(OH)2+CO2=CaCO3↓+H2O ash calcium in the action of CO2 in water and air, the formation of calcium carbonate, and HPMC is just water retention, assist calcium ash better reaction, it does not participate in any reaction itself.


Putty powder is general 100 thousand can, what the requirement is some higher in mortar, want 150 thousand ability to use.Moreover, hydroxypropyl methyl cellulose HPMC is the most important role of water retention, followed by thickening.In putty pink, want to hold water only good, viscosity is some lower (70-80 thousand), also can, of course, viscosity is some bigger, relative water retention wants better, when viscosity exceeds 100 thousand, viscosity is not big to the influence of water retention.