Sodium polyacrylate is a synthetic polymer that plays a role mainly as a dispersant in slip, engobes and glazes. Its main function is to improve the flowability of ceramic mixtures by reducing viscosity without adding more water. This allows working with less water content, which in turn reduces shrinkage and the risk of deformation or cracking during drying and firing.
In slip, sodium polyacrylate ensures that clay particles and other materials remain in suspension, preventing sedimentation and guaranteeing a homogeneous mixture. This is especially important in techniques such as casting, where an even distribution of materials is essential to obtain well-formed parts. In addition, this polymer is useful in glazes and engobes, where it facilitates smooth and consistent application.
Despite its functionality, the use of sodium polyacrylate requires caution, since an excessive amount can cause over-dispersion, hindering the cohesion of the materials. Therefore, it is essential to adjust the proportions carefully and to test beforehand.
Interesting Fact
This polymer is known outside the ceramic field for its use in absorbent products, such as diapers and construction materials, due to its ability to retain large volumes of water.
Helpful Tip
Start by adding small amounts of sodium polyacrylate to your mixtures and adjust as needed to achieve the desired consistency. Be sure to sift materials before combining to avoid clogging or lumps. Always work in a well-ventilated area and wear gloves to protect your skin when handling chemical mixtures.
