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Highly efficient tin-free catalyst for polyurethane and polyester-based crosslinking systems.
Enables low-temperature curing without compromising film hardness or chemical resistance.
Excellent storage stability in two-component coating and adhesive formulations.
Low volatility and reduced odor profile compared to traditional amine or metal-based catalysts.
Compatible with hydroxyl- and carboxyl-functional resins, supporting broad formulation flexibility.
Automotive clearcoats and basecoats requiring rapid ambient or low-bake cure.
Industrial maintenance coatings for metal substrates exposed to harsh environments.
Wood finishing systems where low VOC and minimal yellowing are critical.
High-performance coil coatings demanding excellent edge coverage and flexibility.
| Chemical Type | Organic complex catalyst (non-metallic, tin-free) |
| Product Form | Liquid |
| Appearance | Clear, pale yellow liquid |
| Primary Applications | Polyurethane and polyester crosslinking in coatings and adhesives |
| Key Features | Low-temperature cure, tin-free, low-VOC compliant |
| Benefits | Improved pot life, enhanced substrate adhesion, reduced emissions |
| Storage Stability | ≥12 months at 20–25 °C in sealed original container |
Q1: What is the primary function of Kat 245 in coating and adhesive formulations?
A: Kat 245 is a highly efficient crosslinking catalyst designed to accelerate the reaction between carbamate or hydroxyl functional groups and melamine or urethane crosslinkers—particularly in low-bake and ambient-cure systems. It enables faster film formation, improved hardness development, and enhanced chemical resistance without requiring high-temperature curing.
Q2: How does Kat 245 compare to traditional acid catalysts like p-toluenesulfonic acid (p-TSA) in terms of handling and stability?
A: Unlike strong Brønsted acids, Kat 245 is a latent, non-volatile, and hydrolytically stable catalyst with significantly lower volatility and reduced odor. It offers better shelf-life compatibility in one-component systems and minimizes premature gelation or viscosity drift during storage—making it especially suitable for high-solids and waterborne formulations.
Q3: Is Kat 245 compatible with common resin systems used in automotive refinish and industrial coatings?
A: Yes—Kat 245 demonstrates excellent compatibility with acrylic, polyester, alkyd, and polyurethane resins, as well as melamine formaldehyde and blocked isocyanate crosslinkers. It is widely used in OEM and refinish applications where balanced cure speed, pot life, and final film performance are critical.
Q4: What is the typical dosage range for Kat 245 in standard formulations?
A: Kat 245 is typically used at low concentrations—generally ranging from 0.1% to 2% by weight relative to total resin solids—depending on the desired cure profile, crosslinker type, and application method. Optimal dosage should be determined through formulation-specific testing to balance reactivity, storage stability, and film properties.
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E-mail: wangxingqiang@ericwchem.com
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