HPMC

Product Specifications

• 1. Appearance: White or off-white free-flowing fine powder 
• 2. Fineness: 80–100 mesh 
• 3. Moisture: ≤6.0% 
• 4. Ash content: ≤5.0% (≤3% for the high-end, low-ash grade) 
• 6. Gelation temperature: 56-65℃ 
• 7. pH of aqueous solution: 7-9 
• 8. Solubility: The cold-water instant type disperses and dissolves in room-temperature water; the standard type requires wetting with cold water followed by heating to dissolve; it is insoluble in organic solvents such as ethanol and acetone. 
• 9. Ionic Properties: Non-ionic cellulose ether, stable in both acidic and alkaline systems (performance remains unchanged across a pH range of 3 to 11). 
• 10. Methoxy content: 17%-24% 
• 11. Hydroxypropoxy content: 7%-12%

Product Nature

• Characteristics: This product is a white or slightly yellowish powder, odorless, tasteless, and non-toxic.
• Water solubility and thickening ability: This product is soluble in cold water, forming a clear, viscous solution.
• Solubility in organic solvents: Due to the presence of a certain amount of hydrophobic methoxy groups, this product is soluble in several organic solvents and also in solvent mixtures containing both water and organic components.
• Salt Tolerance: Since this product is a nonionic, non‑polymeric electrolyte, it exhibits good stability in aqueous solutions containing metal salts or organic electrolytes.
• Surface activity: The aqueous solution of this product exhibits surface activity, imparting emulsifying properties, stabilizing colloidal systems, and ensuring relative stability.
• Thermal gelation: When heated above a certain temperature, the aqueous solution of this product becomes opaque, precipitates form, and the solution loses its viscosity. However, upon gradual cooling, it reverts to its original liquid state. The temperatures at which gelation and precipitation occur depend on the product type, the solution concentration, and the heating rate.
• Low ash content: Since this product is nonionic, it can be effectively purified by hot-water washing during preparation, resulting in an extremely low ash content.
• pH stability: The viscosity of the aqueous solution of this product remains relatively stable across a pH range of 3.0 to 11.0.
• Water-retention effect: Because this product is hydrophilic and its aqueous solution exhibits high viscosity, when added to mortars, plasters, coatings, and other formulations, it effectively maintains excellent water-retention properties in the finished products.
• Shape retention: Compared with other water-soluble polymers, the aqueous solution of this product exhibits unique viscoelastic properties. Its addition helps enhance the dimensional stability of extruded ceramic products, among other benefits.
• Lubricity: Adding this product can reduce the coefficient of friction and enhance the lubricity of extruded ceramic and cement products.
• Film-forming property: This product can form strong, flexible, transparent films with excellent oil- and ester-resistant properties.

Product Usage

1. Putty 

Suitable for viscosities of 80,000–120,000 cP.

• High water-holding capacity 
  Cellulose ethers exhibit excellent water-retention properties, preventing rapid moisture loss or excessive absorption by the substrate. They enable putty to retain a certain level of moisture before setting, providing ample time for application and leveling; once cured, the putty attains adequate strength.
• Excellent workability 
  Cellulose ethers exhibit a certain air-entraining property; the tiny air bubbles they form create a “ball-bearing” effect, enabling putty to be applied smoothly and evenly, saving time and effort.
• Crack resistance, enhanced strength 
  Cellulose ethers can enhance the early strength of putties, increase their pull-off adhesion and flexural strength, and improve their flexibility.

2. Ceramic tile adhesive

Suitable for viscosities of 100,000–200,000 cP

• High water-holding capacity 
  Cellulose ethers exhibit excellent water-retention properties, preventing rapid moisture loss or excessive absorption by the substrate. This ensures that tile adhesives retain sufficient moisture before setting, providing ample working time, while delivering superior strength after curing.
• Longer opening hours 
  Cellulose ethers can retard the formation of a skin on the surface of tile adhesives, prolonging their setting time and allowing cementitious or gypsum-based binders to undergo complete hydration. This, in turn, enhances the adhesive’s pull‑out strength and flexibility.
• Excellent sag resistance 
  Cellulose ethers can reduce slippage of heavy or large-format tiles on facade substrates and facilitate adjustment.
• Improve flexibility 
  Cellulose ethers can significantly enhance the early pull‑out strength and flexural strength of tile adhesives, while improving the adhesive’s flexibility and bond strength.

3. Thermal insulation mortar

Suitable for viscosities of 100,000–200,000 cP

• High water-holding capacity 
  Cellulose ethers exhibit excellent water-retention properties, preventing rapid moisture loss or excessive absorption by the substrate. This enables thermal insulation mortars to retain sufficient moisture prior to setting, providing ample time for application; once set, they develop outstanding strength.
• Excellent workability 
  Cellulose ethers exhibit a certain air-entraining effect; the tiny air bubbles they generate create a “ball-bearing” effect, enabling insulation mortars to be applied smoothly and evenly, saving both time and effort.
• Longer opening hours
  Cellulose ethers can retard the formation of a surface skin on thermal insulation mortars, extend the setting time of tile adhesives, and ensure that cementitious or gypsum-based binders undergo complete hydration, thereby enhancing the pull‑out strength and flexibility of thermal insulation mortars.
• Excellent sag resistance 
  Cellulose ethers can reduce slippage of insulation boards on vertical substrate surfaces and facilitate adjustment.
• Improve flexibility 
  Cellulose ethers can significantly enhance the early‑age tensile bond strength and flexural strength of thermal insulation mortars, while also improving their flexibility and adhesion.

4. Gypsum-based mortar

Suitable for viscosities of 40,000–70,000 cP.

• High water-holding capacity 
  Cellulose ethers exhibit excellent water-retention properties, preventing rapid moisture loss or excessive absorption by the substrate. They enable gypsum-based mortars to retain a certain level of moisture prior to setting, providing ample time for handling; once set, they develop superior strength.
• Excellent sag resistance
  Cellulose ethers can enhance the sag resistance of gypsum slurries on wall surfaces, preventing thick layers from running during application and thereby reducing the physical strain on workers.
• Excellent workability 
  Cellulose ethers can reduce the viscosity of gypsum slurries and prevent phenomena such as knife‑hanging.

5. Self-leveling

Suitable for 400 viscosity

• Anti-seepage property 
  Cellulose ethers lock in moisture during the setting and hardening of self-leveling mortars, preventing segregation that can lead to delamination and bleeding.
• Good leveling properties 
  Cellulose ethers enable self-leveling mortars to flow and level automatically under slight external force, minimizing the need for manual intervention.
• Excellent wear resistance 
  Cellulose ethers can enhance the flexibility of self-leveling mortars, thereby improving their wear resistance.

6. Daily Chemicals Sector

Suitable for viscosities from 100,000 to 200,000 cP.

• Cellulose ethers are used in the personal care and household products sector, including laundry detergents, cleaning agents, toners, and facial masks. 
• In this category of applications, it functions as a thickener, emulsifier, suspending agent, humectant, and rheology modifier. In such formulations, when combined with surfactants, it enhances product volume, viscosity, and foam stability.

Product Model and Its Application Areas