Isocyanate Hardener

Discover Dian Chi Chemical®’s premium range of isocyanate hardeners, designed to meet the demanding needs of industrial coatings technology. Our product portfolio focuses on aliphatic polyisocyanates based on hexamethylene diisocyanate (HDI trimer), which are key crosslinkers for two-component (2K) polyurethane and polyaspartic systems.

Our aliphatic isocyanate hardeners provide superior UV stability and weather resistance compared to aromatic curing agents, enabling coatings to keep their original color and ensure long-term non-yellowing performance. With a high NCO content and optimized viscosity, they are perfect for formulating high-solids automotive refinish paints, anti-corrosion industrial coatings, and heavy-duty floor coatings.

Our isocyanate hardeners are compatible with hydroxyl-bearing resins (acrylics, polyesters, and polyaspartics) and provide excellent chemical resistance and mechanical strength. We offer both solvent-free and standard solvent-based products, providing cost-effective alternatives to major industry standard products.

Product Name	Solid Content （%）	Viscosity Range (mpa.s/25°C)	NCO Content （%）	Density （25℃）	Features and Applications
ZGS01P-60	60±2(BA)	100 ~ 300	3.2-3.6	1.01	Dedicated Hardener: Specifically designed for exterior waterproof topcoats. Flexibility Modifier: Adjusts the flexibility of rigid polyaspartic systems. UV Stability: Non-yellowing; passed QUV testing >1500 hours.
ZGS05P-85	85±2(BA)	3000-6000	6.6-7.2	1.07	Chemical Structure: Short branched-chain design. Key Properties: High solid content. Applications: Ideal for formulating flexible, high-solids coatings.
ZGS06P-85	85±2(BA)	4000-6000	4.9-5.3	1.07	Mechanical Properties: High elongation and tensile strength. Durability: Excellent resistance to rain erosion. Applications: Suitable for flexible high-solids coatings (e.g., wind turbine blade topcoats).
ZGS01D-1D	≥99	3000-7000	11.5-12.5	1.11	Physical Properties: High solid content with low viscosity. Performance: Excellent low-temperature elasticity. Applications: For solvent-free elastic weather-resistant topcoats and elastic adhesives.
ZGT04D-100A	≥99	1000-2000	8.5-9.0	1.12
ZGT04D-100B	≥99	1000-2000	10.8-11.2	1.12
ZGS07D-100	≥99	4000-6000	8.6-9.2	1.12
ZGT05D-100	≥99	200-700	19.5-20.5	1.10	Physical Properties: High solid content with low viscosity. Applications: Solvent-free topcoats and flooring systems. Industrial Use: Weather-resistant topcoats for construction machinery.
ZGT03D-100A	≥98	3000-6000	4.7-5.2	1.05	System Type: Designed for solvent-free polyaspartic systems. Applications: Suitable for flexible topcoats and flooring applications.
ZGTO3D-100B	≥98	1500-3000	10.3-10.7	1.05	Physical Properties: High solid content with low viscosity. Applications: Solvent-free flexible waterproof coatings. Versatility: Suitable for flooring systems and sealing materials.
ZGS08P-90	90±2	4500-7000	6.5-7.0	1.04	Mechanical Properties: High elongation and tensile strength. Resistance: Excellent weather and hydrolysis resistance. Applications: Ideal for high-solids elastic waterproof coatings.
ZGS09M-100	≥98	3500-6500	5.8-6.2	1.04	Performance: Superior flexibility, resilience, and high strength. Aesthetics: Excellent yellowing resistance. Applications: Suitable for waterproofing and floor coating systems.

Isocyanate Hardener

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