Epoxy Acrylate UV Resins

Choose epoxy acrylate when hardness, gloss and chemical resistance are the priorities and the substrate is rigid. It is the cost-performance benchmark of UV oligomers. Avoid it as the sole oligomer where the coated part must flex, because the high crosslink density that gives the hardness also limits elongation.

The aromatic bisphenol-A backbone is prone to yellowing under prolonged UV or light exposure. For pigmented systems and interior applications this is usually acceptable. Where colour stability is critical — clear coats, whites, exterior exposure — an aliphatic urethane acrylate is the better base.

The aromatic backbone and hydrogen bonding produce high inherent viscosity. It is normally handled with reactive diluents (monomers such as TPGDA or TMPTA) which reduce viscosity and participate in the cure, or by applying warm. We can supply at a viscosity appropriate to your application method.

Yes, and it is common practice. Blending buys back flexibility and adhesion from the urethane acrylate while keeping the hardness, gloss and cost advantage of the epoxy acrylate. The ratio is a formulation decision we can help you work through.

Suitability for food-contact applications depends on the complete formulation, the packaging structure, the barrier present and the applicable regulation in your market — not on the oligomer alone. Migration testing on the finished structure is required. We can support development, but the compliance assessment must be made against your specific end use.

Required dose depends on film thickness, pigmentation, photoinitiator package and lamp type, so it has to be established on your line rather than quoted generically. Epoxy acrylates generally cure readily; pigmented systems, particularly whites and blacks, need more energy than clears.