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What is CMC & PAC

Sodium carboxymethyl cellulose (CMC) is usually made by the reaction of natural cellulose and caustic soda and a chlorine acetic acid made after the production of an anionic polymer.

It is cellulose carboxymethyl ether sodium salt, an anionic cellulose ether, white or milky white fibrous powder or granules. CMC can be widely used in various industries, for example Food, Pharm, Ceramic, Textile, Paint, Paper-making, Detergent etc.

The international community to this new type of modified CMC also known as “polyanionic cellulose (abbreviated PAC)”. PAC is typically used in Oil drilling industry.

Paint Grade

Paint Grade

THE FUNCTION OF CMC IN THE PAINT INDUSTRY
As a highly effective water-soluble polymer, sodium carboxymethyl cellulose (CMC) can be used independently or together with Hydroxyethyl Cellulose (HEC) or Hydroxypropyl Methyl Cellulose (HPMC). It has the following key applications in the painting industry:

Rheology Modifier
Provides excellent pseudoplastic rheological properties
Achieves shear-thinning behavior for easy application and spraying
Maintains low-shear viscosity to prevent sagging

Dispersion Stabilizer
Stabilizes pigment dispersion through electrostatic repulsion
Prevents filler sedimentation
Improves system uniformity

Moisture Regulator
Adjusts coating open time
Controls drying rate
Reduces surface defects

Film-forming Aid
Enhances coating continuity
Improves film density
Enhances surface gloss

Typical Paint Grade CMC specs:
Specs Viscosity(cps) PH Value Loss on drying
QD40000 2% 40000-50000 6.0-8.5 ≤10.0
QD80000 2%80000-100000
QD100000 2%100000-120000
QD120000 2%≥120000

Note: Specific specs can be customized according to client’s detailed requirements