Hydroxypropyl methylcellulose (HPMC) is a non-ionic cellulose ether made from natural polymer material cellulose through a series of chemical processes. They are an odorless, tasteless and nontoxic white powder that swells into a clear or slightly cloudy colloidal solution in cold water. It has thickening, binding, dispersing, emulsifying, film-forming, suspending, adsorbing, gelling, surface active, moisture-retaining and protective colloid properties. Hydroxypropyl methylcellulose and methylcellulose can be used in building materials, paint industry, synthetic resin, ceramic industry, medicine, food, textile, agriculture, daily chemical and other industries.
Chemical formula:
Hydroxypropylmethylcellulose (HPMC)[C6H7O2(OH)3-m-n(OCH3)m(OCH2CH(OH)CH3)n]x
The main application of hydroxypropyl methylcellulose HPMC in building materials:
1. cement based plaster
⑴ Improve uniformity, make plastering easier to trowel, improve sagging resistance, enhance fluidity and pumpability, and improve work efficiency.
⑵ High water retention, prolonging the storage time of mortar, improving work efficiency, and facilitating the hydration and solidification of mortar to produce high mechanical strength.
⑶ Control the introduction of air to eliminate cracks on the coating surface and form an ideal smooth surface.
2. Gypsum-based plaster and gypsum products
⑴ Improve uniformity, make plastering easier to trowel, improve sagging resistance, enhance fluidity and pumpability, and improve work efficiency.
⑵ High water retention, prolonging the storage time of mortar, improving work efficiency, and facilitating the hydration and solidification of mortar to produce high mechanical strength.
⑶ Control the consistency of the mortar to form an ideal surface coating.
3. Masonry Mortar
⑴ Enhance the adhesion with the masonry surface, enhance the water retention, and improve the strength of the mortar.
⑵ Improve the lubricity and plasticity, and improve the construction; the mortar improved by cellulose ether is easier to construct, saves construction time and reduces construction costs.
⑶ Ultra-high water-retaining cellulose ether, suitable for high-water-absorbing bricks.
4. Panel joint filler
⑴Excellent water retention, prolong the opening time and improve work efficiency. High lubricant, easier to mix. ⑵ Improve shrinkage resistance and crack resistance, improve coating surface quality. ⑶ Improve the adhesion of the bonding surface and provide a smooth and smooth texture.
5. Tile Adhesive ⑴Easy to dry mix ingredients, no lumps, increase application speed, improve construction performance, save working time and reduce working cost. ⑵ By prolonging the opening time, the efficiency of tiling can be improved and excellent adhesion effect can be provided.
6. Self-leveling floor materials ⑴ provide viscosity and can be used as anti-sedimentation additives. ⑵Enhance the pumpability of fluidity and improve the efficiency of paving the ground. ⑶ Control water retention and shrinkage, reduce cracks and shrinkage of the ground.
7. Water-based paint ⑴Prevent solid precipitation and prolong the container life of the product. High biological stability, excellent compatibility with other components. ⑵ Improve fluidity, provide good anti-splash, anti-sagging and leveling properties, and ensure excellent surface finish.
8. Wallpaper powder ⑴ Dissolve quickly without lumps, which is good for mixing. ⑵ provide high bond strength.
9. Extruded cement board (1) has high cohesiveness and lubricity, and enhances the machinability of extruded products. ⑵ Improve green strength, promote hydration and curing effect, and increase yield.
10. HPMC products dedicated to ready-mixed mortar HPMC products dedicated to ready-mixed mortar have better water retention in ready-mixed mortar than ordinary products, ensuring sufficient hydration of inorganic cementitious materials, significantly preventing the reduction of bond strength caused by excessive drying, and Cracks caused by drying shrinkage. HPMC also has a certain air-entraining effect. The HPMC product specially used for ready-mixed mortar has an appropriate amount of air-entrained, uniform and small air bubbles, which can improve the strength and smoothing of ready-mixed mortar. The HPMC product specially used for ready-mixed mortar has a certain retarding effect, which can prolong the opening time of ready-mixed mortar and reduce the difficulty of construction.
Post time: May-24-2023