CN | EN
CN | EN
Empowering high-end coating formation, pushing the limits of building material applications - Paint Grade CMC
Industry Challenges
The demand for sodium carboxymethyl cellulose (CMC) as a thickener and stabilizer in the paint and coating material industry is becoming increasingly prominent. There is a growing need for CMC to provide excellent thickening, water retention, anti-sag, and anti-settling properties while ensuring product environmental friendliness.
Fortune Biotech’s paint grade CMC is specially engineered for high-end water-based coatings, stone-like finishes, and other systems. Through precise control of the degree of substitution and polymerization, it offers a variety of viscosity grades. This product effectively enhances the applicability and storage stability of coatings, making it an ideal choice for achieving high-performance, eco-friendly formulations.
Looking for the right product grade for your production?
Go to our Product Introduction page to find the ideal CMC solution for your needs.
Application Cases
Case 1: Thickening and Anti-Sagging in Latex Paint
Challenge: If the viscosity of latex paint is too low, the coating film may become too thin during application on vertical surfaces, leading to sagging, dripping, and reduced coverage.
CMC Application: As a primary or auxiliary thickener, CMC can rapidly build the viscosity of the paint, particularly under medium to high shear conditions. This ensures the paint has an appropriate consistency during brushing or rolling, resulting in a full coating film that effectively resists gravity-induced sagging.
Case 2: Improving Storage Stability (Anti-Settling) of Paints
Challenge: Pigments and fillers in paint, such as titanium dioxide and calcium carbonate, have a much higher density than water. During long-term storage, these particles tend to settle at the bottom, forming hard cakes that are difficult to redisperse.
CMC Application: The network structure formed by CMC in the paint provides sufficient yield value and low-shear viscosity, effectively “suspending” the pigment and filler particles. This significantly slows down sedimentation, maintaining the homogeneity and stability of the paint system.
Case 3: Extending Open Time and Improving Leveling
Challenge: When painting in dry or windy conditions, rapid water evaporation can cause the coating film to dry too quickly on the surface. This results in prominent brush marks and visible lap marks where wet and dry paint sections meet.
CMC Application: CMC acts as an excellent water-retaining agent. Like a sponge, it absorbs a significant amount of water and releases it slowly, thereby extending the wet stage (open time) of the coating film. This allows the film more time to flow and level, ultimately forming a smooth, even surface.
