hydroxypropyl methylcellulose HPMC in Plastering MortarFebruary 2nd 2023
Hydroxypropyl methyl cellulose products are widely used to improve the performance of hydraulic building materials, such as cement and plaster.
HPMC can enhance the plastic viscosity and cohesion of mortar, reducing the water migration and loss ability, and improving the water retention of mortar
In the building materials, the dosage of hydroxypropyl methyl cellulose is very small, only 0.1% to 1%. But its effects are great and can be used as plasticizers, water-retaining agents, air-entraining agents and retarders in coatings, gray paste, mortar and cement products to play the role of water retention or the adhesive force between the bases. In addition, hydroxypropyl methyl cellulose also meets the demands of environmental protection. In the dry-mixed mortar, it helps to avoid performance instability caused by the formation of mixture, pollution of the surrounding environment, poor construction conditions and low labor efficiency. Tile adhesives and the internal & external wall putty usually use adhesive before. However, from an environmental point of view, the application of cellulose ethers can be more preferable, such as HydroxyEthyl Cellulose and hydroxypropyl methyl cellulose.
The effects of adding cellulose ethers include: 1). improving the initial and final setting time of cement; 2). enhancing the strength of cement mortar to overcome limits; 3). improving the water-holding capacity of cement and gypsum; 4). reducing the compressive strength and shear strength of cement mortar; 5). improving the bonding performance of mortar.