Wax dispersion CERAFAK 110 on the basis of EVA copolymer for solvent-borne effect coating systems, especially for automotive coatings. Improves the orientation of effect pigments and prevents settling in the can. cerafak 106 Aromatic-free product.
Composition:Ethylene vinyl acetate copolymer wax dispersion (EVA)
Carrier:Butyl acetate/n-butanol 15/1
Melting point (wax content):100°C
Particle size (Hegeman):20 microns
Viscosity (23℃):10 mPa-sec
In addition to fully communicating the content of the components, the requirements for the balance of quality and performance, the baking conditions, the functions in the coating and the coating method, etc., in order to understand the applicability of the additives in the production and preparation and select the appropriate additives, it is more important to The correctness of the entire application and operation process, even the compatibility and stability of the additives, the compatibility, and the correct addition method and technology.
Compatibility and stability
Coatings are mixed-type products. The compatibility of each component is a prerequisite for functioning and avoiding side effects. The evaluation method of compatibility can be visual observation of the coating liquid or comparison with colorimeter measurement. In addition, it can also Observe the gloss of the coating film or the separation and precipitation of the surface after film formation. Another meaning of compatibility refers to safety reactivity, such as direct mixing of strong acids and strong bases, decomposition caused by the addition of accelerators in high concentrations, or various production operations and safety issues caused by rapid temperature rise. You can learn from the “material safety data sheet” provided by the supplier, or consult the supplier, and strictly abide by the operating procedures to avoid danger.
The key to the dispersion stability of the wetting and dispersing agent to the pigments and fillers is the selection of the wetting and dispersing agent and the dispersion fineness. In addition, due to the slightly higher activity of anionic or cationic groups in ionic wetting and dispersing agents, systems that are more sensitive to acidic or alkaline conditions need to be evaluated for stability and compatibility, and the compatibility part can be extended It shows that these anions or cations inhibit or promote the crosslinking and curing reaction of reactive coatings, which may cause slow drying, softness or insufficient crosslinking of the coating film, or cause rapid crosslinking and curing, which affects the physical properties of the coating film. These also need to be considered. There is also the influence of driers and accelerators on the stability of the system. The direct manifestation is that the viscosity in the tank rises or even gels. Excessive addition of driers can easily cause paint skinning. The same is true when curing accelerators are added to single-component coatings. It is easy to cause the viscosity to rise, affect the gloss of the coating film, and even associate, slightly crosslink or react with certain components. Among them, the most typical baking paint curing accelerator added before.
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