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LR-1420
Ruqinba
LR-1420 is a solvent-free amino-functional co-reactant for polyisocyanates.
Polyaspartic resin LR-1420 is a solvent-free, bis-secondary amine structure compound, a low-viscosity resin capable of reacting with -NCO groups.
Low Viscosity & High Performance: Enables formulation of 100% solid content, low-VOC coatings. Offers excellent adhesion, resistance to peeling, and low-temperature flexibility, remaining crack-free at temperatures as low as -35°C.
Fast Reactivity & Formulation Flexibility: Reacts rapidly with HDI trimers, achieving touch-dry in 15 minutes. LR-1420 can be used alone or blended with hydroxyl acrylic resins, LR-1520, or LR-1220 before cross-linking with aliphatic isocyanates, allowing precise adjustment of pot life and dry times.
Exceptional Finish: Delivers excellent film build, leveling, and high gloss.
Superior Weatherability: Provides outstanding resistance to weathering, aging, and UV exposure, ensuring long-term outdoor durability without chalking or degradation. Retains over 95% of its properties after 4000 hours of QUV-A testing.
High Hardness & Abrasion Resistance: Achieves a pencil hardness of up to 2H and exhibits exceptional wear resistance (Taber Abrasion ≤ 20 mg, 500 cycles/750g load).
Versatile Application: Compatible with plural-component spray equipment, brush, roller, or trowel application methods.
Tailored Mechanical Properties: Can be formulated with flexible curing agents to create elastic materials (400% elongation, 25 MPa tensile strength) or with rigid hardeners (e.g., HDI trimers/dimers) to produce rigid, crack-resistant films (2H hardness) that withstand stress from substrate thermal expansion/contraction.
| Item | Typical Value | Test Method |
| Appearance | Colorless to light yellow transparent liquid | Visual Inspection |
| NH Equivalent (g/mol) | 277.0 | Theoretical |
| Hydroxyl value Equivalent（%） | 6.0 - 6.2 | Theoretical |
| Color (Fe-Co) | ≤ 4 | GB/T 1722-1992 |
| Amine Value (mgKOH/g) | 190 - 210 | Q/RQB 3013-2025 |
| Density (Water=1, 25°C) | 1.02 - 1.08 | GB/T 15223-2008 |
| Solids Content (%) | ≥ 95 | Q/RQB 5005-2025 |
| Viscosity (mPa·s, 25°C) | 500 - 2000 | GB/T 9751.1-2008 |
Note: The data represents typical values only and should not be considered as specifications or guaranteed values for the material unless explicitly agreed upon in writing.
High-End Paints: Enhances film build, gloss, hardness, and dry time in automotive refinish and premium wood coatings.
Protective Coatings: Used as a topcoat for corrosion-resistant and waterproofing systems on swimming pools, steel structures, oil pipelines, roofs, and walls.
Flooring Systems: Ideal for industrial floors, residential waterproof coatings, garage decks, sports surfaces, and coatings for foam sculptures.
Wind Turbine Blades: Suitable for gel coats, fillers, and topcoats in wind energy blade protection systems.
Shelf life is one year when stored in original, unopened, undamaged, sealed containers at temperatures ≤30°C.
200KG/drum.
Store in a cool, dry place, away from acids and water.
1. LR-1420 polyaspartic resin is flammable and should be stored at low temperatures (≤30°C), away from ignition sources, in a cool, dry, and ventilated environment. Avoid exposure to moisture, heat, and foreign substances. The storage period is one year.
2. Coatings made with this product should be cured for one week before testing coating performance.
