Cycloaliphatic Amine Blend (Fast Cure)
Key Features
- UV-resistant cycloaliphatic chemistry with faster cure than pure IPDA/PACM
- Good balance of cure speed, Tg, and weathering resistance
- Low blush at moderate humidity and temperature
- Low viscosity for efficient fiber wet-out in laminates
- Achieves high Tg (120–130°C) with short 80°C post-cure
Cycloaliphatic Amine Blend (Fast Cure) is a pre-formulated hardener combining cycloaliphatic diamines (such as IPDA and a modified cycloaliphatic amine) to achieve a balance of UV stability, fast ambient cure, low blush, and moderate Tg. Pure cycloaliphatic amines like IPDA or PACM offer excellent UV resistance but can be too slow for production applications. This optimized blend accelerates cure to practical gel times of 30–60 minutes at 20°C while retaining the UV yellowing resistance associated with cycloaliphatic chemistry. The blend is especially suited for epoxy systems used in outdoor, marine topcoat, and sports equipment manufacturing where a production-friendly cure rate and long-term weathering resistance are both required. Mix ratio with standard BPA epoxy is approximately 30–38 phr. Cured systems exhibit Tg of 90–110°C (ambient cure), improving to 120–130°C with a moderate post-cure at 80°C for 2 hours. Chemical resistance to fuels, oils, and mild acids is good. The low viscosity of the blend (<200 mPa·s at 25°C) ensures thorough fiber wet-out in laminating applications.
Specifications
| Parameter | Value |
|---|---|
| Type | Cycloaliphatic amine blend (IPDA-based) |
| Appearance | Clear to slightly hazy liquid |
| Shelf Life | 18 months in sealed container |
| Viscosity (25°C) | 80–200 mPa·s |
| Amine Hydrogen Equivalent Weight | 35–50 g/eq |
| Gel Time (100g, 25°C with BPA epoxy) | 30–60 minutes |
Applications
FAQ
Pure IPDA has a long pot life (2–4 hours) which is useful for infusion but too slow for production laminating. Blending with a faster-reacting cycloaliphatic component reduces gel time to 30–60 minutes while maintaining UV stability. The blend retains low blush and good mechanical properties while offering a production-friendly cure rate. This is the standard approach in sporting goods and marine topcoat markets.
Direct Contact
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