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Aliphatic structure provides excellent UV stability and superior resistance to yellowing.
Low viscosity enables easy handling, efficient mixing, and improved wetting of fillers and substrates.
High epoxy equivalent weight supports formulation flexibility for low-reactivity, extended pot life systems.
Excellent chemical resistance to alkalis, solvents, and mild acids in cured form.
Compatible with a broad range of aliphatic and cycloaliphatic amine hardeners for ambient or elevated cure profiles.
UV-stable clear coatings for architectural concrete and decorative flooring.
High-gloss, non-yellowing protective topcoats for marine and transportation composites.
Electrical encapsulants and potting compounds requiring long-term color retention.
Adhesives for bonding glass, metals, and plastics in outdoor-facing assemblies.
Formulation base for high-performance, low-VOC industrial maintenance coatings.
| Chemical Type | Aliphatic diglycidyl ether of neopentyl glycol |
| Product Form | Liquid resin |
| Appearance | Clear, pale yellow liquid |
| Epoxy Equivalent Weight (EEW) | 260–280 g/eq |
| Viscosity at 25°C | 300–500 cP |
| Density at 25°C | 1.04–1.06 g/cm³ |
| Refractive Index (25°C) | 1.445–1.455 |
| Primary Applications | UV-stable coatings, electrical encapsulants, adhesives, composite matrices |
Q1: What distinguishes Dow DER 755 from aromatic epoxy resins?
A: Dow DER 755 is an aliphatic epoxy resin, offering superior UV stability and color retention compared to aromatic counterparts, which tend to yellow upon exposure to sunlight or thermal aging. Its aliphatic backbone also contributes to lower viscosity and enhanced flexibility in cured systems.
Q2: Is Dow DER 755 suitable for use in coatings requiring high gloss and long-term clarity?
A: Yes — its low chromophore content and resistance to photo-oxidation make it well-suited for clear, high-gloss coatings where optical stability and minimal yellowing are critical, such as protective topcoats for architectural or decorative applications.
Q3: Can Dow DER 755 be used as a reactive diluent in conventional epoxy systems?
A: Yes — it functions effectively as a low-viscosity, difunctional aliphatic epoxy diluent that reduces formulation viscosity without significantly compromising crosslink density or chemical resistance, particularly in UV-curable or thermally cured systems.
Q4: How does Dow DER 755 perform in terms of compatibility with common amine and anhydride hardeners?
A: It exhibits good reactivity and miscibility with standard aliphatic and cycloaliphatic amines, as well as many anhydride curing agents. Cure profiles may vary depending on catalyst presence and thermal conditions, but full conversion and robust network formation are readily achievable.
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