F420 Polyaspartic Resin — Making Premium Coatings More Efficient and Eco-Friendly

Feiyang Protech’s F420 (equivalent to Desmophen® NH1420) is a fast, well-balanced polyaspartic ester resin designed to help formulators achieve high performance with higher efficiency. 

Solvent-Free + High Reactivity: Green and Efficient at the Same Time

As industrial coatings move toward greener solutions, regulations are increasingly driving lower-VOC technologies and the gradual replacement of highly polluting, solvent-rich systems. In this context, solvent-free and high-solids approaches have become a primary direction for the coatings industry.

F420 is solvent-free, with a viscosity of roughly ~1,000 cps, making it suitable for formulating high-solids or solvent-free coatings while helping reduce VOC emissions at the source. This supports green manufacturing goals and contributes to a better working environment for coating applicators.

Just as importantly, F420 delivers real productivity gains. When paired with an HDI trimer, it can achieve 15-minute touch dry time and 40-minute hard dry time—significantly faster than conventional systems. This faster turnaround improves efficiency in industrial, anticorrosion, waterproofing, and flooring applications—shortening project cycles, lowering application costs, and supporting cost-reduction and efficiency initiatives.

Balanced, All-Around Performance You Can Rely On

The coating film formed by F420 can be viewed as a truly well-rounded performer across the properties that matter most in real-world coatings:

1. Premium appearance: High build, excellent leveling, and high gloss—ideal for anything from mirror-like automotive finishes to the crystal-clear depth expected in premium wood coatings.
2. Strong mechanical strength: >40 MPa strength, with excellent abrasion and impact resistance—providing a solid foundation for robust mechanical performance.
3. Powerful protection: Outstanding weatherability, water resistance, solvent resistance, acid/alkali resistance, and salt-spray resistance—reliable long-term protection for outdoor steel structures, waterproofing under long-term immersion, and wind turbine blade protection under continuous operation.
4. Excellent adhesion: Strong adhesion to a wide range of substrates, including carbon steel, aluminum alloys, various ferrous and non-ferrous metals, ABS/PC/PVC plastics, fiberglass, wood, concrete, leather, rubber, foam, and more.
5. High compatibility: Blends well with most acrylic resins, fluorocarbon resins, petroleum resins, CAB, and other materials.
6. Wide tunability: From rigid 2H hardness systems to elastic systems with 400% elongation and 25 MPa tensile strength. Cure speed can be tuned from ~40-minute thumbprint-dry to several hours, and pot life can be adjusted from 5 minutes to several hours.

Versatile by Nature: Multi-Scenario Fit, Maximum Practical Value

F420 can serve as a main resin in coatings, adhesives, and composites, and it can also be used as a chain extender and main resin in SPUA (spray polyurea elastomer) systems.

• Premium paints: Automotive coatings, defense coatings, and more—enhancing gloss and appearance, accelerating cure, and improving overall eco-efficiency.
• Anticorrosion coatings: Steel structures, oil pipelines, construction machinery, ships, and other light- and heavy-duty anticorrosion scenarios—delivering durable, long-term protection.
• Specialty materials: Foam landscape decorative coatings, concrete waterproofing materials, grout/sealant products, and other applications requiring specialized functionality.
• New energy: Gelcoat, putty, topcoat, and leading-edge protection for wind turbine blades to meet stringent wind power requirements; plus adhesives for EV batteries, pack protection, and chassis protection for new energy vehicles.

From solvent-free efficiency to balanced all-around performance—and from formulation flexibility to true multi-scenario adaptability—Feiyang Protech’s F420 polyaspartic ester resin brings the philosophy of “Technology Helps You Soar” to life through practical, measurable performance. Whether you are a coatings professional or a user with premium finishing needs, this multifunctional resin is well worth evaluating in your next formulation.

What is polyaspartic polyurea?

Polyaspartic polyurea is a new type of aliphatic, slow-reacting, high-performance coating material that has emerged in the polyurea industry in recent years, and it is often referred to as the third generation of polyurea.

Polyaspartic polyurea is mainly formed through a rapid addition reaction between isocyanate groups (–NCO) and aspartate ester groups (–NH₂), producing tough urea linkages (–NH–CO–NH–) and building a highly crosslinked three-dimensional network structure. This reaction typically follows a “slow-to-fast” process: the aspartate ester acts as a “blocked” amine, delaying the reaction so that application becomes more controllable, ultimately forming a high-performance, solvent-free protective coating.

Polyaspartic polyurea technology creatively replaces the –OH groups used in traditional polyurethane technology and the –NH₂ groups used in spray polyurea with –NH groups, and introduces electron-withdrawing groups into the structure to further reduce reactivity. As a result, the application and coating process of polyaspartic polyurea becomes simpler, enabling a broader range of applications.

Polyaspartic coatings are premised on the reaction between polyisocyanate and a polyaspartic ester, an aliphatic diamine. This synthesis yields a novel aliphatic polyurea floor coating system, known for its desirable UV resistance and color stability. Polyaspartic resins outshine their counterparts like epoxy and acrylate, thanks to superior mechanical and chemical properties, such as adhesion, solvent resistance, and overall durability.

Key Application Areas:

• Exterior coatings where color stability is paramount.
• Swimming pools, furniture, roofs, and garages.
• Wind power installations and pipeline coatings.
• Infrastructure in malls, hospitals, airports, and more.

Advantages:

• Applicable in temperature ranges from -34°C to 60°C.
• High-temperature tolerance up to 245°C when cured.
• Superior wear, impact resistance, and mechanical strength.
• UV resistance and elasticity are markedly high.
• Enhanced decorative appeal and eco-friendliness.

Feiyang 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

80+ Patents

Polyaspartic Polyurea Industry Standards

Oil and gas overhead pipeline anti-corrosion and insulation technology standard, coded as SYITT34 72016.

Standard for polyaspartic polyurea anti-corrosion coatings. In 2018, HG/T5368-2018 was promulgated.

Polyaspartic polyurea waterproof coatings. Group standards HG/T5368-2018 was promulgated in 2021.

Polyaspartic polyurea sealant. Group standard to be issued in 2021.

Polyaspartic polyurea waterproof glue for building exterior wall. Group standard was started in 2018.

Polyurea automotive paint standard, jointly formulated by FAW, Feiyang, etc. In 2015, FAW enterprise standards were formulated, similar to industry standards.