Hydroxyethyl Methyl Cellulose (HEMC)

MelaCollTM Hydroxyethyl Methylcellulose (HEMC or MHEC) are excellent thickener and water retaining agents in construction industries for tile glue, grouts, skim coat, and cement render. Multiple grades and tailored formulation are available to suit various industrial needs.

Additional information

Packing

25KG each,custom packing available

Delivery

Around 7 Days

Payment Terms

T/T or L/C at sight

Product Details

 

Product Description

 

MelaCollTM Hydroxyethyl Methyl Cellulose (HEMC), also known as Methyl Hydroxyethyl Cellulose (MHEC), is a non-ionic cellulose ether that is made from natural polymer cellulose through a series of etherification reactions. Our HEMC products are excellent in water solubility, water retention, surface activity, thickening, film formation, adhesion, suspension, and high-temperature resistance, etc. Our products have been widely used in various industries, including tile adhesives, grouts, skim coat/wall putty, cement renders, gypsum-based products, cement-based mortars, water-based latex coating, and oil drilling, etc.

 

Product Specifications  

 

Appearance: white or off-white powder
Moisture: ≤5%
Ash: ≤5%
Etherification(MS/DS): 0.8-1.2/1.8-2.0
pH value: 6-8
Gel temperature:70-85°C
Viscosity: 400-75,000 mPa.s (Brookfield RV, 2%)

 


Product Properties And Characteristics

 

PropertyDetails
ThickeningImprove product viscosity, sag resistance, and adhesion to different substrates
Water RetentionReduce moisture loss, delay the absorption of water by the porous materials, conducive to cement hydration and longer opening hours
Anti-saggingImprove the thixotrophy of the product and prevent sagging on a vertical surface; ensure the stability of the final products.
rheology controlEnhance workability and smooth on-site application; Enhance final consistency
Open timeExtend the hardening time of the product; make the raw materials fully hydrated; improve the tensile strength and flexibility of the product
Surface activityFunction as surfactants in aqueous solution; Act as a protective colloid and emulsifier.
EmulsificationReduce the surface and interfacial tension and thicken the aqueous phase to ensure the stability of emulsion liquid
High gel temperatureHigh thermal stability with a high gel temperature of 70-85°C
NonionicWithout ionic charge
SolubilitySoluble in water and organic solvents
PH stabilityStable in a range between pH 3.0-11.0

 


Major Differences Between MelaColl HPMC And HEMC

 

  • MelaColl HEMC has a higher gel temperature (70-85°C): The gel temperature is closely related to the thermal stability. With a higher gel temperature, our HEMC products have outstanding performance stability for constructions under high temperatures.
  • MelaColl HEMC has better hydrophobicity or water retaining rate due to that there are more hydrophilic groups in the structure of HEMC; therefore, it has better effects in water retention, construction workability, crack resistance, and sag resistance compared to our HPMC with the same viscosities. This difference is more evident in hot construction environments.

 

Product Grades  

 

ModelViscosity (Brookfield,2%.20℃)Recommended Applications
ME400300-500Self-leveling
ME60005000-6000Ceramics
ME100009000-10000Ceramics; Cement grout
ME2000015000-25000Tile adhesive; Plaster; Wall putty; Grout; Repair mortar
ME4500040000-55000Cement adhesive; Plasters; Wall putty; EIFS; Gypsum-based Building Material
ME7000065000-75000Tile adhesive; Concrete adhesive; Gypsum Adhesive
ME45000S40000-50000Emulsion-based joint filler; Emulsion-based tile adhesive
ME70000S65000-75000Emulsion-based tile adhesive
ME50000SD45000-55000detergents
ME70000SD65000-75000detergents

 

Main Applications And product Benefits

 

  • Tile Adhesives: MelaColl high viscosity grades are recommended for the tile adhesive to effectively improve its adhesion, water retention, sag resistance, and workability features.
  • Wall Putty/Skim Coat: MelaColl medium viscosity products are recommended for the skim coat. It can improve product mixing, enhance product lubricity and workability. It can also prevent cracks and improve sag resistance, water retention, and open time of the construction.
  • ETICS/EIFS: Our products are widely used in EIFS adhesives and base coats to improve the adhesion and cohesion features of the products. It can enhance water retention, prolong open time, and improve construction workability and consistency.
  • Cement Plaster: Our medium viscosity products are used in cement renders to improve water retention, workability, sag resistance, final consistency, and production rates.
  • Flooring System: Our low viscosity product is recommended for the application in self-leveling flooring compounds to improve the rheology (e.g. fluidity), leveling, and workability.
  • Gypsum-based Building Materials: Our medium viscosity products are recommended in gypsum applications to improve workability, water retention, sag resistance, and adhesion to different substrates.
  • Detergents: Our high viscosity grades are recommended for detergent application to control the thickening, rheology, emulsification, and optical clarity properties of the products.

 

Featured Services

 

  • Tailor-made formulation
  • OEM service

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