
- Principal:Arkema Rheology and Specialty Additives Group
- Functions:Rheology Modifier
- Chemical Family:Amide Waxes, Polyamides
- End Uses:Pre-Coated Metal (PCM) Coating
- Labeling Claims:Heavy Metal-free, No Added Alkylphenol Ethoxylates (APEO)
- Physical Form:Paste
CRAYVALLAC® PA3 WDA 20 is a pre-activated amide wax supplied in a mixture of mineral spirit (D60) and alcohols. Under paste form for post-addition to solvent-based low polarity coating systems, it provides a shear-thinning rheology with thixotropic viscosity recovery to coating formulations. In coating systems, its crystalline fibres form an interacting network which gives rise to the shear-thinning rheology of the final coating. It provides a very high viscosity under the low shear rates associated with sedimentation, and a low viscosity at the much higher application shear rates. The net result is excellent control of sedimentation combined with ease of application. Immediately following application, the coating’s viscosity undergoes a time dependent recovery as the network re-establishes itself. This time dependence is known as thixotropy and enables the final coating to attain very good levelling.