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The shallow admixture, which plays a key role in improving the performance of building dry-mix mortar, accounts for more than 40% of the material cost in dry-mix mortar. Most additives in the domestic market are supplied by foreign manufacturers, and the reference dosage of products is also provided by the suppliers.

Hydroxypropyl methyl cellulose (HPMC)
Application introduction:
1. Construction industry: As a water retention agent and retarder for cement sand slurry, the slurry is pumpable. Used as a binder in plastering plaster, gypsum material, putty powder or other building materials to improve the spreadability and extend the operating time. Used for pasting ceramic tiles, marble, plastic decoration

Redispersible latex powder is a water-soluble redispersible powder, a copolymer of ethylene and vinyl acetate, with polyvinyl alcohol as a protective colloid. Because the redispersible latex powder has high binding properties and other unique properties, such as water resistance, workability and thermal insulation, etc., its application range is extremely wide.

The characteristics and benefits of hydroxypropyl methylcellulose used in building materials are many. Sleochem gives you a detailed introduction:
Characteristics of hydroxypropyl methyl cellulose

The re-dispersible latex powder mainly plays the role of toughness and strength in construction projects. Generally, the effect of adding a certain amount of strength will be good, but the following problems should be noted during the use of the product:

Method one, ash method. Take a certain amount of re-dispersible latex powder, weigh it, place it in a metal container, heat up to about 500 degrees, after burning at 500 degrees high temperature, cool to normal temperature, and weigh again. Light weight and good quality.

Generally speaking, the higher the viscosity, the better the water retention effect of gypsum mortar. However, the higher the viscosity, the higher the molecular weight of the cellulose ether, and the corresponding reduction in its solubility, which has a negative impact on the strength and construction performance of the mortar. The higher the viscosity, the more obvious the thickening effect on the mortar, but it is not proportional.

1. The pure hydroxypropyl methylcellulose HPMC has a fluffy visual state and a small bulk density in the range of 0.3–0.4/ml; the adulterated hydroxypropyl methylcellulose HPMC has better fluidity and feel more Shen, there is a clear difference from the authentic appearance.

Hydroxypropyl methylcellulose is a cellulose ether derivative, and its production currently has two process routes: horizontal kettle dry method and vertical kettle solvent method;