Focus on Cellulose ethers

Cellulose Ethers from Kima Chemical Co.,Ltd

Cellulose ethers are water-soluble polymers derived from cellulose,the most abundant polymer in nature. For more than 60 years,these versatile products have played an important role in a host of applications, from construction products, ceramics and paints to foods, cosmetics and pharmaceuticals.
For construction products, cellulose ethers act as thickeners, binders,film formers and water-retention agents. They also function as suspension aids, surfactants, lubricants, protective colloids and emulsifers. In addition, aqueous solutions of certain cellulose ethers thermally gel, a unique property that plays a key role in a surprising
variety of applications. This valuable combination of properties is not found in any other water-soluble polymer.
The fact that so many useful properties are simultaneously present and often act in combination can be a signifcant economic advantage. In many applications, two, three or more ingredients would be required to do the same job performed by a single cellulose ether product. In addition, cellulose ethers are highly effcient, often
yielding optimal performance at a lower concentration than that required with other water-soluble polymers.
Dow Construction Chemicals offers a wide array of cellulosic products, including methyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose. Methyl cellulose ethers are most widely used for many applications in the building and construction industry.

Chemistry of Cellulose Ethers

Our business offers cellulose ethers in four basic types:
1.Hydroxyethyl methyl cellulose (HEMC/MHEC)
2.Hydroxypropyl methyl cellulose (HPMC,MC)

3.Hydroxyethyl cellulose (HEC)

4.Carboxy methyl cellulose(CMC)
Both types have the polymeric backbone of cellulose, a natural carbohydrate that contains a basic repeating structure of anhydroglucose units . During the manufacture of cellulose ethers, cellulose fibers are heated with a caustic solution that, in turn, is treated with methyl chloride, and either propylene oxide or ethylene oxide, yielding hydroxypropyl methyl cellulose or hydroxyethyl methyl cellulose, respectively. The fibrous reaction product is purified and ground to a fine, uniform powder.
Special-grade products have also been formulated to meet the requirements of specifc industries.
Our cellulose ether products are available in three different forms: powder, surface-treated powder and granular. The type of product being formulated influences which form to select. In most dry-mix applications, untreated powder is typically used, whereas for ready-mix applications, in which the cellulosic powder is added directly to water, surface-treated powder or granular forms are preferred.

General Properties

General properties common to our cellulose ethers are listed here. Individual products exhibit these properties to varying degrees and may have
additional properties desirable for specific applications. For more information, email at .





Used as high-performance binders for extruded fber-cement materials

Green strength


Stabilize emulsions by reducing surface and interfacial tensions and by
thickening the aqueous phase


Film formation

Form clear, tough, flexible water-soluble flms

• Excellent barriers to oils and greases
• Films can be made water-insoluble via crosslinking


Reduces friction in cement extrusion; improves hand-tool workability

• Improved pumpability of concrete, machine grouts and spray
• Improved workability of trowel-applied mortars and pastes


Products have no ionic charge

• Will not complex with metallic salts or other ionic species to form
insoluble properties
• Robust formulation compatibility

Solubility (organic)

Soluble in binary organic and organic solvent/water systems for select types and grades

Unique combination of organic solubility and water solubility

Solubility (water)

• Surface-treated/granular products can be added directly to aqueous
• Untreated products must frst be thoroughly dispersed to prevent

• Ease of dispersion and dissolution
• Control of solubilization rate

pH stability

Stable over a pH range of 2.0 to 13.0

• Viscosity stability
• Greater versatility

Surface activity

• Act as surfactants in aqueous solution
• Surface tensions range from 42 to 64 mN/m(1)

• Emulsifcation
• Protective colloid action
• Phase stabilization


Controls settling of solid particles in aqueous systems

• Anti-settling of aggregate or pigments
• In-can stability

Thermal gelation

Occurs to aqueous solutions of methyl cellulose ethers when heated above a particular temperature

•  Controllable quick-set properties Gels go back into solution upon cooling


Wide range of molecular weights for thickening water-based systems

• Range of rheological profles
• Pseudoplastic shear thinning rheology approaching Newtonian
• Thixotropy

Water retention

Powerful water-retention agent; keeps water in formulated systems
and prevents loss of water to atmosphere or substrate

• Highly effcient
• Improved workability and open time of dispersion-based systems
such as tape joint compounds and aqueous coatings, as well as
mineral-bound building systems such as cement-based mortars and
gypsum-based plasters

Cement-Based Tile Adhesives

Our products enable performance of thin-set mortars via water retention and with pseudoplastic rheological performance. Achieve creamy and easy workability and consistency, high water retention, improved wetting to the tile, excellent open time and adjustment time, and more.

Tile Grouts

Cellulose ethers function as a water retention and suspension aid. Discover easy workability, good adhesion to the edges of the tiles, low shrinkage, high abrasion resistance, good toughness and cohesion, and more.

Self-Leveling Underlayments

Cellulosics impart water retention and lubricity to improve flow and pumpability, minimize segregation and more.

Mortars for EIFS/Skim Coat

Deliver the perfect fnishing touch with improved workability, air void stabilization, adhesion, water retention and more.

Cement-Based Plasters

Deliver better performance through improved sag resistance, workability, open time, air-void stabilization, adhesion, water retention, yield and more.

Gypsum-Based Building Materials

Deliver the desired end result of a smooth, even and durable surface with consistent product quality and important performance features.

Cement and Cement-Fiber Extruded Materials

Reduce friction and impart lubricity to aid in extrusion and other forming processes.

Latex-Based Systems (Ready-to-Use)

A range of viscosity grades delivers good workability, delayed solubility, open time, adjustment time and more.

Post time: Nov-13-2018
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