⟡ Cellulose Derivatives / Rheology Modifiers
Cellulose, hydroxyethyl ether (MW ~90,000)
Cellulose, hydroxyethyl ether (commonly referred to as hydroxyethyl cellulose, HEC) is a nonionic, water-soluble cellulose derivative used as a thickener, binder, and rheology modifier in aqueous systems. This grade, with an approximate molecular weight of 90,000, provides moderate viscosity development and good solution clarity while maintaining ease of dispersion.
HEC is widely used in formulations where control over viscosity, water retention, and film formation is important. Its nonionic character supports compatibility across a range of additives and solution conditions, making it useful in coatings, adhesives, and formulation systems that require stable, predictable rheological behavior.
Key Features & Benefits
-
Water-soluble cellulose derivative: readily disperses and hydrates in aqueous systems
-
Nonionic polymer: compatible with a wide range of salts, surfactants, and additives
-
Moderate molecular weight (~90,000): balances viscosity development and processability
-
Rheology control: improves flow behavior, suspension stability, and consistency
-
Film-forming and binding properties: supports cohesive structure in coatings and adhesives
-
Water retention: helps maintain hydration during drying or curing processes
Product Details
-
Product name: Cellulose, hydroxyethyl ether
-
Common name: Hydroxyethyl cellulose (HEC)
-
Approximate molecular weight: ~90,000
-
Polymer type: Nonionic cellulose ether
-
Solubility: Water-soluble
-
Function: Thickener, rheology modifier, binder
Typical Applications
Coatings and paints
Used to control viscosity, improve leveling, and stabilize pigments in aqueous coating systems.
Adhesives and binders
Enhances adhesion and cohesion while improving water retention during application and drying.
Pharmaceutical and formulation systems
Used as a binder, stabilizer, or viscosity modifier in suspensions and controlled-release systems.
Personal care formulations
Provides texture control, thickening, and moisture retention in lotions, gels, and shampoos.
Construction and cement additives
Improves workability, water retention, and consistency in mortars, plasters, and tile adhesives.
Functional Role
Hydroxyethyl cellulose functions as a rheology modifier and water-retaining polymer. When hydrated, it forms a viscous solution that helps control flow behavior and stabilize dispersed systems. Its ability to form hydrogen bonds with water contributes to moisture retention and film formation, supporting uniform application and consistent performance across formulations.
Why Molecular Weight Matters
The molecular weight of hydroxyethyl cellulose directly influences viscosity and solution behavior. This ~90,000 MW grade provides a balance between ease of handling and effective thickening. Lower molecular weight grades produce lower viscosity solutions, while higher molecular weight grades increase viscosity and structural stability.
For a broader overview of how molecular weight impacts polymer performance, see our polymer molecular weight selection guide.
Handling & Storage
- Store in a cool, dry place in a tightly sealed container.
- Protect from moisture to maintain powder quality.
- Add gradually to water with mixing to promote proper dispersion.
- Consult the SDS for detailed handling and safety information.
FAQ
Click a question to expand.
What is hydroxyethyl cellulose used for?
HEC is used as a thickener, rheology modifier, and binder in coatings, adhesives, personal care products, and formulation systems.
Is hydroxyethyl cellulose water soluble?
Yes. HEC is water-soluble and forms clear, viscous solutions when properly dispersed.
What does HEC do in formulations?
HEC controls viscosity, stabilizes suspensions, and improves water retention and application consistency.
How does molecular weight affect HEC?
Higher molecular weight increases viscosity and structural stability, while lower molecular weight improves ease of handling and flow.
Is HEC compatible with other ingredients?
As a nonionic polymer, HEC is generally compatible with a wide range of formulation components.
