Top 4 Tips About HPMC Solubility
December 18th 2024
Influence on Rheology and Workability
Cellulose ethers, such as HPMC (Hydroxypropyl Methylcellulose), significantly affect the rheological properties of tile adhesive. They influence factors like workability, slip resistance, and the consistency of the adhesive.
Influence on Open Time
In tile adhesive, both rubber powder and cellulose ether are present in the mortar. While the rubber powder binds with cement hydration products, cellulose ether influences the viscosity and setting time. When water evaporates from the mortar, cellulose ether forms a surface film within 5 minutes, which slows down further evaporation. If the film is too thin, it won’t effectively retain water, reducing adhesive strength. On the other hand, a thick film can make it difficult to apply tiles.
The type of cellulose ether (HPMC, HEMC, MC) and its degree of substitution directly affect the film formation, and in turn, the open time of the tile adhesive.
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