Features Of Biaomei SiFast SF-729/729A Leveling Agent
High efficiency, low dosage and convenience - Small dosage, simple operation, efficiently improve leveling effect and reduce use cost
Excellent dual-system compatibility - Suitable for solvent-based and water-based coating systems, strong versatility, no need to replace additives
Excellent leveling and wetting - Fast leveling speed, outstanding interface wetting performance, reduce surface defects
Better slip than similar products - Stable wettability and leveling in UV systems, slip performance surpasses similar products
Typical Applications Of Biaomei SiFast SF-729/729A Leveling Agent
Solvent-based coatings - Suitable for various solvent-based coatings, optimize leveling and wetting, improve paint film flatness and slip feel
Water-based coatings - Used in various water-based coating systems, improve leveling performance, reduce surface defects of water-based systems
UV coatings - Adding 0.3-0.5% can achieve efficient leveling, enhance hand feel, and perform better than similar products
Solvent-based printing inks - Optimize ink leveling, improve printing uniformity, and enhance the slip performance of printed products
Specifications Of Biaomei SiFast SF-729/729A Leveling Agent
| Product Form | Pale yellow transparent liquid |
| Active Ingredient Content | 100% |
| Ionicity | Non-ionic |
| Viscosity (25℃) | Approx. 280-580mPa·s (typical value) |
| Density (25℃) | Approx. 0.97-1.01g/cm³ (typical value) |
| Flash Point (Closed Cup) | ≥100℃ (typical value) |
| Surface Tension | Approx. 26-30mN/m (typical value) |
| Refractive Index (25℃) | 1.439-1.443 (typical value) |
| Solubility | Soluble in most organic solvents |
| Recommended Usage | 0.1-1.0% of total formulation |
| Storage Conditions | Store at room temperature, avoid extreme heat |
Biaomei SiFast SF-728 Leveling Agent – Frequently Asked Questions (FAQ)
Q1: What types of coating systems is SF-728 compatible with?
A: SF-728 is broadly compatible with solvent-based, high-solids, and UV-curable coatings, including acrylic, polyester, epoxy, and polyurethane systems. It demonstrates good stability in formulations containing common crosslinkers and additives, though compatibility testing under actual production conditions is recommended.
Q2: How does SF-728 improve surface appearance without affecting film properties?
A: SF-728 functions by rapidly migrating to the air-coating interface during film formation, reducing surface tension gradients and suppressing defects such as orange peel, craters, and flow marks. Its low molecular weight and balanced volatility allow effective leveling while minimizing adverse impact on intercoat adhesion, gloss retention, or substrate wetting.
Q3: What is the typical dosage range for optimal performance?
A: SF-728 is typically used at low concentrations—generally ranging from 0.1% to 2.0% by weight relative to total formulation solids. The optimal dosage depends on resin chemistry, pigment loading, application method, and desired surface quality, and should be determined through lab-scale evaluation and pilot trials.
Q4: Does SF-728 influence pot life or cure kinetics in reactive systems?
A: SF-728 is chemically inert toward common curing reactions—including isocyanate–hydroxyl, amine–epoxy, and free-radical polymerization—and does not significantly alter pot life or cure speed when used within recommended dosage levels. However, high loadings may slightly affect viscosity development in some two-component systems.
Q5: Is SF-728 suitable for use in coatings requiring low VOC or high-performance durability?
A: Yes—SF-728 contains no regulated solvents or heavy metals and contributes negligibly to overall VOC content when formulated appropriately. Its silicone-modified structure supports long-term resistance to weathering, thermal cycling, and mechanical abrasion in demanding industrial and automotive topcoats.
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