Hydroxypropyl Methyl Cellulose (HPMC) is one of the most widely used cellulose ethers in modern construction chemistry. From tile adhesive and wall putty to gypsum-based materials and detergent formulations, HPMC provides essential rheology, water retention, thickening, and workability.
This article explains what HPMC is, how it is produced, and how it enhances performance across different applications. It also discusses how manufacturers like Celix optimise HPMC grades for professional users.
HPMC is a non-ionic cellulose ether derived from natural purified cotton or wood pulp. Through etherification with methyl chloride and propylene oxide, the cellulose backbone is chemically modified to deliver excellent performance in water-based systems.
The Key properties of HPMC include water retention, thickening, binding, film formation, and dispersion stability. These properties make it a versatile additive applicable in various fields such as construction and coatings, where it improves material properties, enhances application efficiency, and increases product durability.
Water solubility
High water retention
Thermal gelation
Thickening and rheology modification
Because HPMC is non-ionic, it remains stable in cementitious, gypsum, and polymer systems.
As a premium cellulose manufacturer, the production of HPMC in CELIX involves several stages. Celix HPMC Manufacture Process
1. Raw Material Cotton Crushing
The Fine cotton (made from cotton linters) is ground into powder of the required size at this step.
2. Alkalization & Etherification of Cellulose
The HPMC cellulose reacts with sodium hydroxide to activate hydroxyl groups in the reactor kettle. In Celix, we have four production lines to complete the alkalization process in full digitalisation. Methyl chloride and propylene oxide react with the activated cellulose, introducing methoxy (–OCH₃) and hydroxypropyl (–CH₂CHOHCH₃) groups.
Celix Liquid alkali storage tank Celix Reaction Kettle
3. Neutralisation and Washing
Residual salts and by-products are removed to keep the purity of the HPMC.
4 .Drying and Milling
The HPMC powder is dried, milled, and sieved to specific particle sizes. Celix PM-75U granularity can reach 98% passing the 80 mesh.
Celix Powder Sieving Mills
Celix Cellulose Company use precise control of substitution ratios to achieve predictable viscosity, gel temperature, and water retention performance.
Celix Centrol Control Room
1. Viscosity
If we count in the NDJ viscosity standard, the available range is 400–200,000 mPa·s. Celix will offer you the brookfield viscosity standard so that our customers can easily match the international standard.
NDJ Viscosity (mPa·s.) | Brookfield Viscosity（mPa·s.） |
400 | 400 |
5000-10000 | 5000 |
15000-20000 | 10000 |
20000-30000 | 15000 |
35000-45000 | 20000 |
45000-55000 | 25000 |
55000-65000 | 30000 |
70000-80000 | 35000 |
85000-95000 | 40000 |
100000-110000 | 45000 |
100000-120000 | 50000 |
140000-160000 | 60000 |
180000-200000 | 70000 |
* Higher viscosity = stronger water retention and better sag resistance.
2. Particle Size
Improves dissolution rate and dispersibility. The choice of HPMC particle size primarily depends on the requirements of the end application regarding dissolution rate, powder flowability, and anti-caking properties. For example, in some applications requiring rapid dispersion and dissolution, a fine powder might be chosen, while in applications with higher requirements for powder stability, a slightly larger powder might be selected.
Prevents premature water loss
Improves open time
Enhances anti-sag performance
Recommend Celix's Model: PM-Pro-AS, PM-Pro-AST, PM-Pro-AS2T, PM-Pro-AS2T+
Increased smoothness
Better workability
Recommend Celix's Model: PM-Pro-SWP
Controls setting
Improves pumpability
Recommend Celix's Model: PM-30U
4. Detergents
Acts as a thickener and stabiliser
Recommend Celix's Model: PM-Pro-75US
Enhances viscosity and levelling
Recommend Celix's Model: PM-75U
It is the technical trend to add HPMC to the dry-mix mortar. Hydroxypropyl methylcellulose HPMC directly influences:
Bond strength
Workability
Durability
Water retention
Crack resistance
By choosing high-quality HPMC from experienced suppliers like Celix, construction manufacturers gain reliable performance for climate-specific applications.
Celix Cellulose is a trusted Chinese manufacturer of advanced cellulose ethers and green construction additives. Our products include HPMC, HEMC, HEC,RDP, Defoamer, PVA, PCE and other additives, widely applied in construction, coatings, and home care chemicals.
We're chosen by customers from Africa, Asia, Brazil, Peru, Chile, the UAE and others. We will empower global formulators with sustainable cellulose technology. If you're looking for a trusted HPMC supplier, please kindly contact Celix.
Build Better, Build Greener, with Celix HPMC
Clean Safer, Care Smarter, with Celix Cellulose Ether
Drill Deeper, Operate Safer, with Celix Cellulose Ether
Formulate Precisely, Deliver Safely, with Celix Cellulose Ether
Taste Better, Keep Fresher, with Celix Cellulose Ether
Shape Stronger, Fire Smarter, with Celix Cellulose Ether
Contact Us
Celix Cellulose Co., Ltd, is an integrated chemical cellulose manufacturer with in-house R&D, factories, and global sales sites.
Our products include HPMC, HEC, MHEC, VAE RDP, PCE, PVA, Defoamers, PP fibers, HPS, SHP and Gypsum Retarder.
Celix Cellulose Co., Ltd, is an integrated chemical cellulose manufacturer with in-house R&D, factories, and global sales sites.
Our products include HPMC, HEC, MHEC, VAE RDP, PCE, PVA, Defoamers, PP fibers, HPS, SHP and Gypsum Retarder.
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+8618330106777
info@celixcellulose.com
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