Name: Amine Synergist EDAB (Ethyl 4-Dimethylaminobenzoate)
Brand: Coatingsink
SKU: amine-synergist-edab
Availability: InStock

Question 1

What does an amine synergist do in a UV-curing system?

Accepted Answer

Amine synergists act as hydrogen donors in Type II photoinitiator systems. When the excited photoinitiator (e.g., benzophenone) abstracts a hydrogen atom from the amine, it generates a highly reactive aminoalkyl radical that initiates polymerization. Additionally, amine co-initiators consume oxygen through their interaction with peroxy radicals, effectively scavenging the oxygen that causes surface inhibition and tackiness in UV-cured films exposed to air.

Question 2

How does EDAB compare to DMEA (dimethylethanolamine) as an amine synergist?

Accepted Answer

EDAB (ethyl 4-dimethylaminobenzoate) is a tertiary aromatic amine with low volatility and excellent UV compatibility, making it well-suited for printing inks where odor and migration are concerns. DMEA is a low-molecular-weight aliphatic amine with high reactivity but significant volatility and odor. EDAB is generally preferred in UV offset and flexo inks for food-adjacent packaging due to its lower migration potential, while DMEA may still be used in industrial coatings where volatility is less critical.

Role	Type II co-initiator / surface cure enhancer
Purity	≥98%
Appearance	white to pale yellow solid/liquid (mp ~25°C)
UV Absorption Max	~303 nm
Recommended Dosage	0.5–2.0%

Amine Synergist EDAB (Ethyl 4-Dimethylaminobenzoate)

Specifications

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