HPMC Applications for Tile Adhesives and Grouts in Construction Industry
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Low viscosity HPMC is widely used for self-leveling. Self-levelling is a very advanced construction technology. Due to the natural leveling of the entire floor with minimal interference from the construction personnel, the leveling and construction speed are greatly improved compared to the previous manual leveling process. In self-leveling, the dry-mixing time makes use of the excellent water retention capacity of hydroxypropyl methylcellulose. Since self-leveling requires a well-mixed mortar to be automatically leveled on the ground, the use of water-based materials is relatively large. Adding hydroxypropyl methylcellulose can control the water retention of the ground after pouring, water seepage is not obvious, and the dry ground has high strength and low shrinkage, thus greatly reducing cracks.
The production process of MHEC powder involves several sequential stages. It commences with the extraction of cellulose from natural sources like wood pulp or cotton. Subsequently, the extracted cellulose undergoes alkalization. The ensuing step encompasses etherification via sodium mono chloroacetate, culminating in the production of MHEC. This resultant substance is then subjected to purification, drying, and milling, ultimately yielding the final MHEC product.