- Chemical Family:Acrylics & Acrylates
- Glass Transition Temperature (Tg):105.0 - 105.0 °C
- Features:Solvent Resistance, Stain Resistance, Blocking Resistance
Ottopol 523 is a hard acrylic emulsion with hydroxyl functionality. This functionality allows crosslinks with melamine and isocyanates for excellent solvent resistance. Formulations using aziridine will require a plasticizer or coalescent solvent to aid in the film formation of the dried coating. The use of aziridine will result in a short pot life and will cross-link at room temperature. Formulations using melamine and PTSA (Para-Toluene Sulfonic Acid) are stable for a minimum of thirty days. The starting formulation requires a web temperature of 180°F to activate the cross-linking of the resins. An increase in PTSA will lower the temperature required to activate cross-linking, but larger amounts of PTSA will increase the hardness of the dry film. There are no plasticizers or coalescent aids required for film formation when using a melamine resin with this product.