• • Cellulose Ether
• February 20th 2023

The relationship between viscosity and temperature of HPMC, what should be paid attention to in practical application?

The relationship between viscosity and temperature of HPMC, what should be paid attention to in practical application?
Answer: The viscosity of HPMC is inversely proportional to the temperature, that is, the viscosity increases as the temperature decreases. We usually refer to the viscosity of a product, which refers to the test result of its 2% aqueous solution at a temperature of 20 degrees Celsius.
In practical applications, in areas with large temperature difference between summer and winter, it should be noted that it is recommended to use a relatively lower viscosity in winter, which is more conducive to construction. Otherwise, when the temperature is low, the viscosity of the cellulose will increase, and when the batch is scraped, the hand will be heavy.
Medium viscosity: 75000-100000 mainly used for putty
Reason: good water retention
High viscosity: 150000-200000 is mainly used for polystyrene particle thermal insulation mortar glue powder and vitrified microbead thermal insulation mortar.
Reason: high viscosity, the mortar is not easy to fall, sag, and improve the construction.
But generally speaking, the higher the viscosity, the better the water retention. Therefore, considering the cost, many dry mortar factories use medium-viscosity cellulose (75000-100000) instead of medium-low viscosity cellulose (20000-40000) to reduce the amount of addition. .