HYDROXYPROPYL METHYL CELLULOSE HPMC IN BUILDING MATERIALS

Hydroxypropyl methylcellulose(HPMC) is a nonionic cellulose ether prepared by a series of chemical processing using natural polymer material cellulose as a raw material. They are an odorless, odorless, non-toxic white powder that swells in cold water into a clear or slightly turbid colloidal solution. It has the characteristics of thickening, bonding, dispersing, emulsifying, film forming, suspension, adsorption, gelation, surface activity, moisture retention and protective colloid. Hydroxypropyl methylcellulose, methyl cellulose can be used in construction materials, coatings industry, synthetic resin, ceramic industry, medicine, food, textile, agriculture, daily chemical and other industries.
Hydroxypropyl methylcellulose (HPMC) Chemical equation:
[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
(1) Improve uniformity, make plaster easier to smear, improve sag resistance, enhance fluidity and pumpability, and improve work efficiency.
(2) High water retention, prolonging the placement time of the mortar, improving work efficiency, and facilitating the high mechanical strength of the mortar hydration and solidification.
(3) Control the introduction of air to eliminate cracks on the surface of the coating to form the desired smooth surface.
2. Gypsum-based plaster and gypsum products
(1) Improve uniformity, make plaster easier to smear, improve sag resistance, enhance fluidity and pumpability, and improve work efficiency.
(2) High water retention, prolonging the placement time of the mortar, improving work efficiency, and facilitating the high mechanical strength of the mortar hydration and solidification.
(3) Control the uniformity of the consistency of the mortar to form the desired surface coating.
3. Masonry mortar
(1) Enhance the adhesion to the masonry surface, enhance water retention, and increase the strength of the mortar.
(2) Improve lubricity and plasticity, improve workability; use mortar improved by cellulose ether, which is easier to construct, saves construction time and reduces construction costs.
(3) Extra high water retention cellulose ether for high water absorption bricks.
4. Joint filler
(1) Excellent water retention, extended open time and improved work efficiency. Highly lubricious and easier to mix. (2) Improve the shrinkage resistance and crack resistance and improve the surface quality of the coating. (3) Improve the adhesion of the bonding surface to provide a smooth, smooth texture.
5. Tile Adhesive
(1) It is easy to dry mix ingredients, no clumps, improve application speed, improve construction performance, save working time and reduce work cost.
(2) Improve the efficiency of tiling by extending the opening time and provide excellent adhesion.
6. Self-leveling floor material
(1) Provides viscosity and acts as an anti-settling aid. (2) Enhance the pumpability of fluidity and improve the efficiency of paving the ground. (3) Control water retention and shrinkage, reducing cracking and shrinkage on the ground.
7. Water-based paint
(1) Prevents solid precipitation and prolongs the container period of the product. High biostability with excellent compatibility with other components. (2) Improve fluidity, provide good spatter resistance, sag resistance and leveling to ensure excellent surface finish.
8. Wallpaper powder
(1) Quickly dissolve without clumps, which is good for mixing. (2) Provide high bond strength.
9. Extruded cement sheet
(1) It has high cohesiveness and lubricity and enhances the processability of extruded products. (2) Improve green strength, promote hydration curing effect, and improve yield.
10. Ready-mixed mortar
HPMC products for ready-mixed mortar are better than ordinary products in the ready-mixed mortar, ensuring that the inorganic cementing material is fully hydrated, significantly preventing the bond strength from being caused by excessive drying, and Crack caused by drying shrinkage. HPMC also has a certain venting effect. The HPMC product for premixed mortar has a proper amount of venting, uniformity and small bubbles, which can improve the strength and smearing of the ready-mixed mortar. The HPMC product specially used for ready-mixed mortar has a certain retarding effect, which can extend the opening time of the ready-mixed mortar and reduce the construction difficulty.