Jinzhou Industrial Park, Shijiazhuang, Hebei, China
HPMC is a non-ionic cellulose ether derived from natural cellulose, a polysaccharide found in the cell walls of plants. It’s chemically modified to improve its solubility in water and to give it additional properties that are beneficial for industrial applications. HPMC is a white, odorless, tasteless powder that, when dissolved in water, forms a clear, viscous solution.
Hydroxypropyl Methylcellulose (HPMC) is a non-ionic, water-soluble cellulose ether derivative. It is derived from natural cellulose, which is chemically modified by introducing hydroxypropyl groups and methyl groups. This modification changes its water solubility and gelation properties, making it suitable for various industrial applications, particularly in construction.
Molecular Structure:HPMC is a long-chain polymer with both hydroxypropyl and methyl functional groups. This molecular structure allows it to dissolve in cold water, creating a colloidal solution.
Water Retention: HPMC significantly enhances water retention in construction materials. This ensures the cement or mortar does not lose water too quickly, allowing for proper hydration, which is essential for achieving maximum strength and durability.
Thickening and Rheology Control: HPMC acts as a thickening agent, providing the desired consistency and viscosity in wet mortar or cement-based products. It also improves rheological properties, which means it influences how the material flows, spreads, or resists deformation.
Adhesion and Bond Strength: By improving the viscosity and water retention, HPMC enhances the adhesive properties of mortars and tile adhesives, ensuring better bonding to surfaces.
Film Formation: It can form a flexible and transparent film, which helps protect the surface and improve the overall durability of the construction material.
Thermal Gelation: HPMC exhibits a thermal gelation property, where it forms a gel at a specific temperature. This characteristic helps stabilize the mix and prevents sagging or slipping when applied to vertical surfaces.
Lubrication: HPMC reduces friction, making it easier to spread mortars and adhesives. This property is particularly beneficial during application, reducing the effort required by workers.
| Desc | Range |
|---|---|
| Appearance | White or similar white fibrous orgranular powder |
| Hydroxypropyl content，% | 8-12 |
| Methoxy (degree of substitution) | 18-22 |
| Ash Content (%) | <5 |
| water 2% solution viscosity, mPa.s | 400-85000 Brookfield |
| Gel temperature , 'C | 65-75 |
| PH | 5.5-7.5 |
Tile Adhesives: HPMC improves the adhesive strength, open time, and workability of tile adhesives. It ensures the tiles are securely fixed and provides flexibility during installation.
Cement-Based Mortars: HPMC enhances the water retention, consistency, and workability of mortars, making them easier to apply and ensuring a smooth finish. It also improves the bonding strength to the substrate.
Plasters and Renders: HPMC provides a stable and uniform mix, prevents cracks, and enhances workability in plastering applications. It ensures a smooth surface and reduces the formation of hairline cracks.
Self-Leveling Compounds: HPMC helps control the flow and viscosity of self-leveling compounds, ensuring even spreading and setting. It prevents segregation and bleeding of the compound.
Exterior Insulation and Finish Systems (EIFS): HPMC is used to improve the adhesion and flexibility of base coats and adhesives in EIFS, enhancing the insulation and protective properties of the system.
Gypsum Products: It improves the workability, water retention, and surface smoothness of gypsum-based products like joint fillers and plasters.
Improved Quality: HPMC enhances the overall quality of construction materials, leading to longer-lasting and more durable structures.
Increased Efficiency: It makes materials easier to work with, reducing application time and labor costs.
Versatility: HPMC can be tailored to specific applications by adjusting its properties like viscosity and gelation temperature, making it suitable for a wide range of construction products.
Consistency: HPMC ensures consistent performance across different batches, providing reliability in construction projects.
Environmental Benefits: Derived from natural cellulose, HPMC is biodegradable and environmentally friendly, aligning with sustainable construction practices.
Quality control is crucial for ensuring that HPMC meets the required standards for construction applications. Testing typically includes:
Ensuring the HPMC provides the correct consistency and thickness in formulations.
Verifying that HPMC retains adequate water for proper curing of cement and mortar.
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HPMC is a water-soluble polymer that enhances workability, water retention, and adhesion in construction materials like mortar and tile adhesive, making them easier to apply and more durable.
HPMC forms a gel that traps moisture within cement-based products, ensuring proper curing, reducing drying shrinkage, and minimizing the risk of cracking, which leads to a stronger final product.
Yes, HPMC is effective in both hot and cold weather. It helps retain moisture in hot conditions and improves workability in cold conditions, ensuring consistent performance year-round.
What is the recommended dosage of HPMC for mortars and tile adhesives?
HPMC increases the viscosity and moisture retention of tile adhesives, enhancing their bonding strength, providing a longer open time, and improving overall application performance for better tile placement.
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Jinzhou Industrial Park, Shijiazhuang, Hebei, China
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