Application Field: Curing Agent
Recommended Products：CUCAT-U2
Product Features:
It is used for the synthesis of water-based curing agent. It can target and catalyze the grafting reaction of specific active hydrogen and isocyanate, and can improve the following characteristics of curing agent:
1) Low viscosity of curing agent: it only targets and catalyzes the formation of urea formate group and biuret group, and does not catalyze the side reactions such as the self polymerization of isocyanate, and solves the problems of unstable viscosity and gradually yellowing color of curing agent during storage.
2) Increase the functionality of the curing agent: it can significantly improve the water resistance, chemical resistance, scratch resistance, gloss, fullness and other characteristics of the paint film.
3) High film transparency. Based on the above targeted catalysis, the molecular structure of curing agent is branched.
4) Increase the NCO% of curing agent : graft monomer isocyanate.
5) Good water dispersibility: Based on the higher grafting rate of isocyanate monomer and hydrophilic monomer.
Recommended products：CUCAT-G5A
Product Features:
It is used for the synthesis of TDI curing agent, and its characteristics are as follows:
1) Reach the standard of environmental protection: significantly reduce the content of free TDI, and the single volume of free TDI can be reduced to less than 0.5%;
2) High catalytic activity, less addition and shorter reaction time;
3) Stable storage: neutralization and inactivation in the later stage of reaction, and the curing agent is white and transparent.
| Model | Key Features | Typical Dosage | Standard Compliance |
|---|---|---|---|
| CUCAT-U2 | - Ultra-low viscosity (<150 mPa·s at 25 °C) ensures easy blending - High crosslinking density for enhanced chemical and abrasion resistance - Transparent, non-yellowing film - Grafted NCO groups boost reactivity - Excellent dispersion in both solvent-borne and waterborne systems | 0.5–2 phr | REACH, RoHS, TSCA |
| CUCAT-G5A | - Free TDI < 0.5 % (meets food-contact safety) - Rapid cure at ambient temperature (≤ 6 h) - Long-term stability: no crystallization after 12 months - Fine-particle dispersion for smooth surface finish | 1–3 phr | FDA-compliant, GB 18445 |
phr = parts per hundred resin
Our polyurethane curing agent series empowers coatings, adhesives, and composites across diverse industries:
Waterborne Anti-Corrosion Coatings
Salt-spray resistance ≥ 1,000 hours (ASTM B117)
Excellent adhesion on steel, aluminum, and galvanized substrates
PU Industrial & Athletic Flooring
Shore D hardness 60–70
Abrasion resistance < 80 mg loss (Taber, CS-17, 1,000 cycles)
Superior gloss retention (> 85 GU at 60°)
Waterproofing & Sealants
Hydrostatic pressure resistance ≥ 0.5 MPa
Crack-bridging (–10 °C) without delamination
High-Performance Adhesives & Sealants
Tensile lap-shear strength > 8 MPa (ISO 4587)
Excellent elasticity and weatherability
Specialty Composites & Smart Manufacturing
Automotive interior foams, footwear midsoles, sporting goods—custom formulations for sound-damping, impact-resistance, and lightweight structures
Eliminate middle-man markups—competitive FOB pricing from Guangzhou port.
24 h domestic dispatch; multi-warehouse network across North America, Europe, and Asia.
Tailor NCO/OH ratios, branching architecture, viscosity, and functionality for exact performance targets.
Online formulation guidance, pilot-scale trials, and on-site process optimization.
Every shipment includes a comprehensive QC report; third-party testing available on request.
Pilot-Scale Validation: 200 L & 1 T trial reactors to optimize cure profiles and pot life.
Regulatory Filing Assistance: Support for REACH registration, FDA notifications, and local market approvals.
Application Engineering: On-site trials, customized spray or roll-coat processes, and full production ramp-up support.
Partner with the leading polyurethane curing agent factory to elevate your products’ durability, appearance, and safety.
Let Guangzhou Yourun be your strategic ally — delivering turnkey polyurethane curing agent solutions that drive next-generation coatings and composites!
