Functions of Sodium Carboxymethyl cellulose in Pigment Coating

Sodium carboxymethyl cellulose (CMC) is often used as an important ingredient in pigment coatings for its various functions, which include:

1. Thickening: CMC can act as a thickening agent, increasing the viscosity and improving the stability of the coating.
2. Suspension: CMC can help to suspend pigments and other solid particles in the coating, preventing settling and ensuring uniformity in the final product.
3. Water retention: CMC can improve the water retention properties of the coating, helping to prevent drying and cracking during application and improving the final appearance of the coating.
4. Binding: CMC can act as a binder, helping to hold the pigment particles together and improve their adhesion to the substrate.
5. Film-forming: CMC can also contribute to the film-forming properties of the coating, helping to form a strong and durable film on the substrate.

Overall, the use of CMC in pigment coatings can help to improve the performance, stability, and appearance of the final product, making it an important ingredient in the coating formulation.