H-5110 Modified HDI Isocyanate Curing Agent

H-5110 is a solvent-free, high-performance polyisocyanate curing agent based on modified hexamethylene diisocyanate (HDI). Engineered by Ruqinba Group, this curing agent appears as a clear, colorless to slightly yellow liquid and is specifically designed for high-end aliphatic coating systems.

For technical formulators, H-5110 provides a critical advantage: it extends the application window without sacrificing the rapid return-to-service benefits of polyaspartic technology.

Technical Core: Key Advantages for Professionals

Technical procurement teams specify H-5110 for its ability to optimize the curing kinetics and mechanical properties of the finished coating:

1. Extended Pot Life & Durability

When paired with polyaspartic ester resins, H-5110 offers a significantly longer induction period compared to standard HDI trimers. This allows for easier manual application on large surfaces while maintaining excellent weather resistance, gloss retention, and color stability.

2. Enhanced Film Flexibility

Unlike conventional rigid hardeners, the modified structure of H-5110 imparts superior elasticity and flexibility to the cured film. This makes the coating system highly resistant to cracking caused by substrate vibration or thermal expansion.

3. Solvent-Free & Low VOC

With a solids content of ≥ 97%, H-5110 facilitates the formulation of environmentally friendly coatings that meet the strictest global VOC regulations. Its relatively low viscosity ensures excellent flow and leveling in 100% solids systems.

Specifications

Applications

As a specialized isocyanate curing agent, H-5110 acts as the high-performance hardener for various aliphatic systems. Its unique modification makes it particularly effective in the following sectors:

• High-End Decorative Paints: Specifically designed for automotive refinish coatings and premium wood finishes. H-5110 significantly improves film fullness, gloss, and surface hardness while accelerating the through-dry time for industrial production lines.

• Corrosion-Resistant Protective Coatings: A premier choice for formulating topcoats for swimming pools, steel structures, and oil/gas pipelines. Its dense cross-linking provides an outstanding barrier against moisture and chemical ingress.

• Architectural Waterproofing: Ideal for high-build coatings on roofs, exterior walls, and balconies. The enhanced flexibility of H-5110 allows the system to withstand significant thermal expansion and contraction without cracking.

• Heavy-Duty Flooring Systems: Used as the B-component for industrial workshops, residential waterproof flooring, and parking garage decks. It provides the mechanical toughness required for high-traffic environments and sports surfaces (e.g., basketball courts).

• Specialty Landscape Coatings: Provides a durable, weather-resistant finish for decorative foam and landscape sculptures.

Packaging, Storage, and Safety Standards

• Standard Packaging: Available in high-quality 200 KG UN-certified drums.

• Shelf Life: 12 months from the date of manufacture when stored in original, unopened, and undamaged containers.

• Storage Environment: Maintain at temperatures ≤ 30°C in a cool, dry, and well-ventilated area away from heat sources, sparks, and open flames.

• Compliance: This product is reactive. Please refer to the H-5110 Material Safety Data Sheet (MSDS) for detailed safety protocols and environmental guidance.