Name: Cycloaliphatic Amine Epoxy Hardener CEH-50
Brand: Coatingsink
SKU: epoxy-hardener-cycloaliphatic-amine
Availability: InStock

Question 1

What is the recommended stoichiometric mix ratio of CEH-50 with standard liquid epoxy resins?

Accepted Answer

For a standard bisphenol-A liquid epoxy with an EEW of 185–195 g/eq (e.g., DER 331 or Epon 828), the stoichiometric mix ratio is approximately 3:1 resin-to-hardener by weight. Minor off-stoichiometry of ±5% toward excess amine is acceptable to extend pot life without significantly compromising final mechanical properties.

Question 2

What is the pot life and cure schedule for CEH-50 at ambient temperature?

Accepted Answer

Mixed at a 3:1 ratio with standard DGEBA resin, CEH-50 provides a pot life of approximately 25–35 minutes at 25°C for a 100 g mass. Handling strength is typically achieved in 2–4 hours; full mechanical and chemical resistance develops within 7 days at 25°C, or can be accelerated with a 60°C / 2-hour post-cure cycle.

Question 3

Why does CEH-50 exhibit lower odor compared to conventional aliphatic amine hardeners?

Accepted Answer

The cycloaliphatic ring structure imparts a significantly lower vapor pressure relative to linear aliphatic amines such as TETA or DETA—typically 10–20× lower volatility—reducing inhalation risk and skin-sensitization potential during potting and casting operations. This makes CEH-50 suitable for enclosed-space use while retaining fast ambient cure kinetics.

Amine Value	~935 mg KOH/g
Color (Gardner)	≤ 1
Viscosity (25°C)	80–150 mPa·s
Water Content (Karl Fischer)	< 0.3%
Amine Equivalent Weight (AEW)	60 g/eq

Cycloaliphatic Amine Epoxy Hardener CEH-50

Specifications

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