• • Blog
• March 27th 2026

HPMC manufacturer-Hydroxypropyl Methylcellulose(HPMC)

Hydroxypropyl methylcellulose, also known as hydroxypropyl methylcellulose or hydroxypropyl methyl cellulose ether, is produced by etherifying highly purified cotton cellulose under alkaline conditions.

In dry-mix mortar, the amount of cellulose ether added is very low, but it significantly improves the performance of wet mortar, making it a major additive affecting mortar workability. Currently, the cellulose ether used in dry-mix mortar is mainly hydroxypropyl methylcellulose ether (HPMC). HPMC in dry-mix mortar primarily functions to retain water, thicken, and improve workability.

1. Building Mortar/Plastering Mortar

High water retention allows for complete cement hydration, significantly increasing bond strength. It also appropriately improves tensile and shear strength, greatly improving construction results and work efficiency.

2. Water-resistant Putty

In putty, hydroxypropyl methylcellulose ether primarily functions as a water-retaining, binding, and lubricating agent, preventing cracking and dehydration caused by excessive water loss. It also enhances the putty’s adhesion, reduces sagging during application, and facilitates smoother application.

3. Plaster Series

In plaster series products, hydroxypropyl methylcellulose ether primarily functions as a water-retaining agent and increases lubrication. It also has a certain retarding effect, solving problems such as bubbling and cracking during application and insufficient initial strength, thus extending the working time.

4. Interface Agent

Primarily used as a thickener, it improves tensile and shear strength, enhances surface coating, and strengthens adhesion and bonding strength.

5. Exterior Wall Insulation Mortar

In this material, hydroxypropyl methylcellulose ether plays a key role in bonding and increasing strength, making the mortar easier to apply, improving work efficiency, and providing anti-sagging properties. Its high water retention extends the mortar’s working time, improves shrinkage and crack resistance, enhances surface quality, and increases bonding strength.

6. Tile Adhesive

Its high water retention eliminates the need for pre-soaking or wetting of tiles and substrates, significantly improving bond strength. The mortar offers a long application period, is fine and uniform, and easy to apply, while also exhibiting good resistance to water migration.

7. Grout/Gluing Agent

The addition of hydroxypropyl methylcellulose ether provides excellent edge adhesion, low shrinkage, and high abrasion resistance, protecting the substrate from mechanical damage and preventing seepage that could affect the entire building.

8. Self-Leveling Materials

The stable adhesion of hydroxypropyl methylcellulose ether ensures good flowability and self-leveling capabilities. Controlled water retention allows for rapid setting, reducing cracking and shrinkage.

9. Latex Paints and Coatings

In the coatings industry, hydroxypropyl methylcellulose ether can be used as a film-forming agent, thickener, emulsifier, and stabilizer. It provides good abrasion resistance, evenness, adhesion, and improved pH stability, enhancing surface tension. It also exhibits good compatibility with organic solvents. Its high water retention properties result in excellent brushability and leveling properties.

10. Honeycomb Ceramics

New honeycomb ceramics impart lubricity, water retention, and increased strength to the substrate.

High-quality hydroxypropyl methylcellulose can be uniformly and effectively dispersed in cement mortar and gypsum-based products, encapsulating all solid particles and forming a wetting film. Moisture in the matrix is ​​gradually released over a considerable period, undergoing a hydration reaction with inorganic cementitious materials, thus ensuring the material’s bonding strength and compressive strength. Therefore, during construction in the high temperatures of summer, to achieve the desired water retention effect, it is necessary to add a sufficient amount of high-quality HPMC product according to the formula. Otherwise, quality problems such as insufficient hydration, reduced strength, cracking, hollowing, and peeling may occur due to excessively rapid drying, which also increases the difficulty of construction for workers. As the temperature decreases, the amount of HPMC added can be gradually reduced, while still achieving the same water retention effect.

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