Carboxymethyl Cellulose (Paper & Coating Grade)
CAS Number: 9004-32-4
Carboxymethyl cellulose (CMC) is a water-soluble anionic cellulose ether used in paper coating formulations as a thickener, water-retention agent, and co-binder. It provides excellent rheology control in coating colors, improving runnability and coating uniformity. CMC is also used in the wet end as a dry strength additive and as a surface sizing component.
Technical Specifications
| appearance | White to off-white fibrous powder |
| pH (1% solution) | 6.5–8.5 |
| solid content (%) | ≥ 99 |
| degree of substitution (DS) | 0.65–1.20 |
| viscosity (2% solution, mPa·s) | 10–5000 |
Applications
- Thickener and water-retention agent in pigment coating colors
- Co-binder in latex-based paper coating formulations
- Wet-end dry strength and retention aid
- Surface sizing additive for improved surface properties
- Viscosity modifier in specialty paper coatings
Key Features
- Wide viscosity range for flexible coating rheology control
- Excellent water retention to prevent over-drying of coating
- Compatible with most coating binders including SB latex and starch
- Improves leveling and reduces coating defects on coater
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