Sodium CMC or CMC, has been widely used in the painting industry as good thickener, stabilizer and protective colloid due to its excellent properties. Last time we talked about the application of Sodium CMC used in ordinary paints. Today let’s talk about the application in latex coatings.
Latex coating is mainly composed of aqueous dispersion of polymer and pigment. The viscosity of latex coating has an effect on the settling property of pigment, brushing property, roll coating property, fullness of film, leveling property and flow hanging property on the vertical surface of film, so we often need to adjust the viscosity and rheological property to achieve the ideal effect. As Sodium CMC has the characteristics of good fluidity, small brush resistance and easy construction, it has been commonly used in latex coating as stabilizer, thickener and water retaining agent. The specific effects of Sodium CMC in the application of latex coating are as follows:
- It has excellent thickening effect. The thickening efficiency of latex coating is high.
- It can make the coating with a certain viscosity which maintains good stability so that it does not precipitate in storage.
- It can also prevent water from rapidly entering porous substrate, so that it can meet the requirements of water retention when the content of emulsion is relatively high.
- It has less restrictions on the coating formula, and is less affected by the latex type, dispersants and surface active agents.
- When the coating is finished, the viscosity of latex coating is restored, and it can effectively prevent flow hanging.
If you would like to get more information about Sodium CMC used for latex coating, please feel free to contact us.