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As a more commonly used additive in dry powder mortar, hydroxypropyl methylcellulose plays an important role in it. Due to its own structural characteristics, it can also ensure that the water in the mortar will not be lost. This is its water retention. As one of the basic indicators of this additive, it is also important to do its detection work before using it. So what methods can help us?

As for hydroxypropyl methylcellulose, many people may not be clear about it, but it is very complicated from the name. Today I will come to help you understand this product from a few small questions. Please read it carefully.

In order to make better use of this product, we need to understand its related knowledge and performance. Today we will first understand how to test the viscosity of this product, please be sure Read it carefully.

1. The role of hydroxypropyl methylcellulose in construction mortar and plastering mortar: high water retention capacity can fully hydrate the cement and significantly increase the bonding strength. At the same time, the tensile strength and shear strength can be appropriately increased, greatly improving the construction effect and improving work efficiency.

Hydroxypropyl methylcellulose, also called hpmc, is used in many industries and can be used as a variety of additives. Among them, hydroxypropyl methylcellulose is most commonly used in the construction industry. It has very good performance, good water retention, thickening, and construction performance. Let us focus on the water retention of hydroxypropyl methylcellulose:

The viscosity of hydroxypropyl methylcellulose HPMC is inversely proportional to the temperature, that is, the viscosity increases as the temperature decreases. We usually say that the viscosity of hydroxypropyl methylcellulose HPMC refers to the test result of hydroxypropyl methylcellulose HPMC at a temperature of 20% in a 2% aqueous solution.

The most important characteristic of hydroxypropyl methylcellulose is its water retention capacity in building materials. Maintain sufficient water in the mortar for a long time to meet the workability, and water also plays a role of lubrication and mixing in the inorganic composition. In this way, the thin layer mortar is easy to be combed or the plaster mortar is easy to be leveled repeatedly. In addition, due to the addition of cellulose in the mortar, the wall does not need to be wetted, so it can be constructed more efficiently.

In the ready-mixed mortar, the addition amount of HPMC is very low, but it can significantly improve the performance of the wet mortar and is a major additive that affects the construction performance of the mortar.

MC is methyl cellulose, which is made into cellulose ether by a series of reactions after the refined cotton is treated with alkali, using methyl chloride as the etherification agent. Generally, the degree of substitution is 1.6~2.0, and the solubility varies with the degree of substitution. Belongs to non-ionic cellulose ether.