Leveling additive EFKA FL 777 from BASF is a fluorinated polyacrylate additive for improving flow and leveling in epoxy and PU coatings. The additive is built on polymer chains that incorporate fluoropolyacrylate segments, which lower surface tension and promote rapid, uniform spreading of the resin melt, thereby reducing the appearance of orange‑peel, flow lines, and other surface defects. Fluoropolyacrylate groups are chemically inert, allowing the additive to retain its performance even in highly aggressive epoxy environments and under the elevated cure temperatures typical of polyurethane systems. In practice the additive is introduced at 0.3–2.0 % of the total formulation weight, a range that delivers optimal surface smoothness while preserving the mechanical integrity of the cured film. When used in printing inks, EFKA FL 777 helps to achieve even pigment dispersion and mitigates defects caused by uneven drying; in radiation‑curable systems it accelerates the migration of low‑molecular‑weight components to the surface, enhancing gloss and smoothness. Recommended handling includes pre‑dissolving the additive in a solvent compatible with the base resin (aromatic or aliphatic solvents are common) followed by thorough mixing to ensure homogenous distribution. The additive is compatible with conventional viscosity modifiers, dispersants, and curing agents and does not cause phase separation. Stored in a dry, cool environment (5 °C–25 °C) the product retains its activity for 48 months, with packaging protecting against moisture and UV exposure. Typical industrial applications span automotive topcoats, protective finishes for metal and wood structures, electronic device encapsulation, and high‑precision printing processes where flawless surface quality is essential. By reducing surface tension, EFKA FL 777 enables the formation of very thin, defect‑free layers, a capability especially valuable in aerospace and medical device coatings where stringent flatness and smoothness specifications are mandatory.
| Тип | Фторполиакрилат |
| Содержание тв. в-в | 35–40% |
| Дозировка | 0.3–2.0% от рецептуры |
| Срок хранения | 48 мес. |
| Совмест. | Эпокси, ПУ, акрил |
190 kg drum
To maintain the performance of EFKA FL 777, store the additive in a dry, well‑ventilated area at a temperature range of approximately 15 °C to 25 °C, protected from direct sunlight and heat sources. The product has a shelf life of 48 months provided the packaging remains intact. During transport and unloading avoid mechanical damage, moisture ingress, and contamination. When handling, wear appropriate personal protective equipment such as gloves and safety goggles.
