Aspartic acid, N,N'-[methylenebis(2-methyl-4,1-cyclohexanediyl)]bis-, 1,1',4,4'-tetraethyl ester

Product Description

LR-1520 is a solvent-free resin with a bis-secondary amine structure, capable of binding with polyisocyanates.

Key Features & Benefits

1. 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.

2. Fast Reactivity & Formulation Flexibility: Reacts rapidly with HDI trimers, achieving touch-dry in 120 minutes. LR-1520 can be used alone or blended with hydroxyl acrylic resins, LR-1420, or LR-1220 before cross-linking with aliphatic isocyanates, allowing precise adjustment of pot life and dry times.

3.  Exceptional Finish: Delivers excellent film build, leveling, and high gloss.

4. 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.

5. 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).

6. Versatile Application: Compatible with plural-component spray equipment, brush, roller, or trowel application methods.

7. 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.

Typical Product Specifications

Note:The data provided are typical values and should not be construed as strict specifications or guarantees unless explicitly agreed upon in writing.

Applications

1. High-End Paints:  For automotive and premium wood coatings. Enhances film build, gloss, and hardness, accelerates drying. Suitable for high-concentration color pastes; white paste can reach 100% solids with ~70% TiO₂. Excellent carbon black dispersion for deep black finishes.

2. Protective Coatings:  Topcoat for corrosion-resistant and waterproof systems on swimming pools, steel structures, pipelines, roofs, and walls.

3. Flooring Systems:  Industrial floors, residential waterproof coatings, garages, sports surfaces, and protective coatings for foam sculptures.

4.  Wind Turbine Blades:  Gel coats, fillers, and topcoats for wind energy blade protection.