The role of cellulose ether in ceramic tile adhesive

Cellulose ether is a common ceramic tile adhesive additive, it can improve the rheological properties of ceramic tile adhesive, water retention performance, opening time and bond strength. The role of cellulose ether in tile glue mainly depends on its type, etherification degree, viscosity, dosage and modification factors.

Whether the addition of cellulose ether in tile glue will reduce the water resistance strength, it should be judged according to the specific situation. Generally speaking, the addition of cellulose ether can improve the water resistance strength of tile glue, because it can reduce bleeding and segregation, improve the quality of bond interface, delay the hydration reaction of cement, reduce shrinkage and cracking. However, if the content of cellulose ether is too high or the viscosity is too high, it may affect the wettability of the ceramic tile glue and the base layer and the surface layer, leading to the bond is not strong, thus reducing the water resistance strength. In addition, the influence of different types and etherification degrees of cellulose ether on water resistance strength is also different, generally speaking, methyl cellulose ether effect is better than hydroxypropyl methyl cellulose ether on water resistance strength improvement . There are some modification additives, such as RDP, silica fume, etc., can also be used with cellulose ether to further improve the water resistance of ceramic tile glue.

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