Concerned about strong paint fumes during renovations? Frustrated with long drying times that delay your project? Worried about outdoor facilities rusting and cracking too soon? If these issues sound familiar, it’s time to discover the versatile and cost-effective solution—Feiyang Protech F421 Polyaspartic Ester Resin.
As a solvent-free resin, it features a built-in secondary amine group that reacts efficiently with -NCO, making it the perfect solution for both industrial production and everyday coating needs. With its outstanding performance, this eco-friendly and highly efficient resin provides clear benefits—practical, effective, and easy to use.
Solvent-free, Ultra-environmentally Friendly, and Completely Pure
With sustainability a growing priority, F421 sets a new standard by being completely solvent-free. Boasting over 99% solid content, it meets strict eco-friendly and solvent-free standards, while eliminating the need for extra dilution. Its high purity and stability are remarkable—achieving a color of just 5 Hazen (Pt-Co method), it’s as clean as distilled water, with no harsh odors or harmful emissions. Coatings made with F421 are safe for indoor spaces, closed workshops, or even children’s rooms—no need for masks or worrying about unpleasant smells. Contractors can work comfortably, and there’s no need to wait for the ‘off-gassing’ period before moving in or starting production. It’s the ideal green solution, without the hassle.
| Index | Value |
|---|---|
| Appearance | Colorless to light yellow-green transparent liquid |
| Hazen (Pt-Co) | ≤250 |
| Solid Content (%) | ≥99 |
| Amine Value (mg KOH/g) | 190 ~ 215 |
| Amine Equivalent (g/mol) | 277 |
| Equivalently Hydroxy Content (%) | 6.13 |
| Viscosity (mPa.s / 25°C) | 800 ~ 2500 |
| Relative Density (25°C) | 1.06 ± 0.02 |
15-Minute Fast Surface Drying—Efficiency at Its Best
No one likes waiting around when deadlines are tight and the clock is ticking. With F421, you can cut down on ‘wait time’ drastically—when used with HDI trimer, it dries to the touch in just 15 minutes. That’s about the time it takes to grab a coffee or scroll through social media, and the project can keep moving forward. No more waiting for paint to dry in automotive factories, no more late-night rush jobs for urgent repairs, and even home renovations can move ahead with the next steps on the same day as the walls are painted. It boosts work efficiency, saving both time and money.
Versatile and Tough—Built to Last
This is where F421 truly shines! It’s a performance powerhouse, ready to switch between ‘soft’ and ‘hard’ protection modes to meet your needs. Looking for ‘soft protection’? Pair it with an elastic curing agent, and it becomes the ‘rubber band’ of coatings—offering flexibility with up to 400% elongation and 25 MPa tensile strength. It’s perfect for sealing roof leaks, pipe joints, or protecting flexible equipment, stretching without cracking. Need ‘hard protection’? Switch to a rigid curing agent or HDI trimer (or dimer), and it transforms into the ‘tempered glass’ of coatings, reaching 2H hardness that resists scratches from nails, keys, or light impacts.
What’s even better is its all-around protection: the film not only delivers excellent fullness, leveling, and gloss but also excels in weather resistance, water, solvent, acid and alkali resistance, and salt spray resistance. Whether exposed to the harsh sun, rain, or seawater corrosion, or facing industrial chemical wear, F421 acts like a ‘protective shield’ for your base materials—resisting rust, cracking, or fading. It provides long-lasting protection without the need for frequent maintenance.
Highly Compatible—Perfect Match for Any Surface
F421 is the ultimate “team player” in the coating industry, effortlessly adapting to any surface. Whether it’s tricky plastics like ABS, PC, or PVC, or metals like steel and aluminum, it sticks like a magnet, providing strong adhesion without peeling or flaking, ensuring a solid foundation for coatings on various materials. It also seamlessly pairs with most hydroxy acrylic resins, CAB, and other materials, reacting easily with different types of isocyanate hardeners. No need for formula adjustments or special additives—paint manufacturers can optimize their formulas without major changes, and contractors can switch materials without needing new products. It’s all about flexibility, allowing for easy customization of the final product’s performance.
Versatile and Applicable Everywhere
F421 isn’t just for industrial use—it’s incredibly versatile and finds applications in many everyday settings.
- High-end coatings: In automotive paints, wood finishes, and other premium coatings, it creates a glossy, mirror-like surface with rich depth and texture, while also boosting drying speed and making the surface more scratch-resistant.
- Corrosion protection: For steel structures, oil pipelines, and outdoor railings, it forms a dense protective barrier that resists corrosion, reducing maintenance costs in the long run.
- Waterproofing & Landscaping: Used for roof waterproofing, basement moisture barriers, and park foam coatings, it offers both water-tight sealing and durability against sun exposure and the elements.
- Renewable energy: Perfect for wind turbine blades, putties, topcoats, and leading-edge protection, F421 thrives in harsh outdoor conditions, ensuring stable and reliable operation in the wind power sector.
F421, developed by Feiyang Protech, features a unique formula that’s exclusive worldwide. With years of expertise in polyaspartic materials, the company has a well-established R&D system and strict quality control processes, ensuring stable and reliable product quality. With a viscosity range of 800 to 2500 mPa·s at 25°C, it offers excellent ease of application. As environmental standards become more stringent, high-performance, durable materials are essential. Whether you’re a paint manufacturer looking to optimize formulas, a contractor seeking to improve efficiency, or in need of an eco-friendly, durable coating, F421 is the perfect solution to meet your needs and is an ideal choice for expanding applications.
Feiyang Protech has been specializing in the production of raw materials for polyaspartic coatings for 30 years and can provide polyaspartic resins, hardeners and coating formulations. Feel free to contact us: [email protected]
Our products list:
- Polyaspartic Resin
- Isocyanate Hardener
- Epoxy Hardener
- Polyaspartic Coating Formulation showcase cases
Consult our engineers to customize a coating formulation for your project. Contact our Tech Team