mortar additive hpmcMay 11th 2023
construction hpmc-Advantages of Hydroxypropyl methyl cellulose
The viscosity of hydroxypropyl methylcellulose is related to its molecular weight, which is high when it is large. Temperature also affects its viscosity, the temperature increases, the viscosity decreases. Its solution is stable when stored at room temperature.
The water retention of hydroxypropyl methyl cellulose depends on its added dosage, viscosity, etc. Its water retention rate is higher than that of methyl cellulose under the same amount of addition.
Hydroxypropyl methyl cellulose is stable to acid and alkali, and its aqueous solution is very stable in the range of pH=2~12. Hydroxypropyl methyl cellulose has stability to general salts, but the high concentration of salt solution, hydroxypropyl methyl cellulose solution viscosity has a tendency to increase.
Hydroxypropyl methyl cellulose can be mixed with water-soluble polymer compounds and become a uniform, higher viscosity solution. Such as polyvinyl alcohol, starch ether, vegetable gum, etc.
Hydroxypropyl methyl cellulose has better enzyme resistance than methyl cellulose, and the possibility of enzymatic degradation of its solution is lower than that of methyl cellulose.
The adhesion of hydroxypropyl methyl cellulose to mortar construction is higher than that of methyl cellulose.