Protaweld® TX120RB is a calcium alginate polymer used as an extrusion aid and binder to produce high-quality coated electrodes on welding rods. This grade of Protaweld® is typically used to product larger or thicker welding rods.
Protaweld® TX120RB is an alginate polymer that is highly thixotropic and is added to welding rod coatings to improve the efficiency of the extrusion process. Since Protaweld® TX120RB is thixotropic, the capacity of welding electrode coating production can be increased without increasing extrusion pressure.
In addition, Protaweld® TX120RB allows for more homogenous and thicker electrode coatings to be formed and applied to metal welding rod cores since it imparts improved green bond strength. The Protaweld® TX120RB alginate also binds extremely well to water and in coverage paste, it also retains moisture. This creates better body and facilitates easier viscosity adjustment prior to applying the coating. This also improves the plasticity of the coating while also reducing the chances of cracking occurring during welding.
Thixotropic rheology modification
Reduces extrusion pressure of welding rod coatings
Allows for thicker welding rod coatings to be formed
Increases green bond strength of welding rod coating
Good adhesion to metal welding rod cores
Creates homogeneous, smooth electrode coatings that yield better welding performance
High extrusion pressure of thick welding rod coatings
Poor welding quality due to uneven electrode coatings
Cracking during welding
Loss on drying (% max): 15
Viscosity (mPa·s): 40–600
Particle size (200 mesh, %): 65–93
Particle size (120 mesh, % min): 90
Sulfated ash (%): 24.5–33.0
Calcium (%): 5.7–8.2
CaO (%): 8.0–12.0
Sodium (% max): 1.5
Na₂O (% max): 2
Primary Chemistry: Calcium alginate
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