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Low-viscosity, reactive liquid epoxy resin with excellent flow and wetting characteristics.
High purity formulation with low chloride content for enhanced electrical insulation performance.
Compatible with a broad range of amine and anhydride curing agents for versatile formulation design.
Offers good adhesion to metals, composites, and cured polymer substrates.
Stable shelf life under recommended storage conditions (unopened, <25°C).
Electrical encapsulants and potting compounds for transformers, sensors, and power electronics.
High-voltage insulating varnishes and impregnating resins for motor and generator windings.
Structural adhesives requiring thermal stability and dielectric integrity.
Composite matrix resins for aerospace and industrial laminates.
Formulation base for specialty coatings demanding chemical resistance and adhesion.
| Chemical Type | Bisphenol-F based diglycidyl ether |
| Product Form | Clear to pale yellow liquid |
| Appearance | Transparent, slightly viscous liquid |
| Epoxy Equivalent Weight (EEW) | 159–165 g/eq |
| Viscosity at 25°C | 12,000–16,000 cP |
| Chloride Content | ≤ 500 ppm |
| Softening Point | Not applicable (liquid at room temperature) |
| Primary Applications | Electrical insulation, potting, impregnation, structural adhesives |
Q1: What is the primary function of Dow DER F 356 in epoxy formulations?
A: Dow DER F 356 is a liquid bisphenol-A based epoxy resin designed primarily as a reactive diluent and viscosity modifier. It reduces formulation viscosity without significantly compromising crosslink density or thermal performance, enabling improved processability in coating, adhesive, and composite applications.
Q2: How does Dow DER F 356 compare to conventional solid epoxy resins like DER 331 or DER 332?
A: Unlike solid epoxy resins, Dow DER F 356 is supplied as a low-viscosity liquid at room temperature, eliminating the need for heating or solvent addition during handling. This offers advantages in energy efficiency, mixing uniformity, and compatibility with high-solids or solvent-free systems.
Q3: Is Dow DER F 356 suitable for use in food-contact or potable water applications?
A: Dow DER F 356 is not pre-qualified for direct food-contact or potable water applications. Its suitability for such uses depends on full system evaluation—including curing agents, processing conditions, and final regulatory review—by the formulator or end-user in accordance with applicable local and regional regulations.
Q4: What types of curing agents are commonly used with Dow DER F 356?
A: Dow DER F 356 is compatible with a broad range of amine-based hardeners (e.g., aliphatic, cycloaliphatic, and aromatic amines), anhydrides, and catalytic systems. Selection depends on desired cure schedule, mechanical properties, and end-use environment—formulators typically screen candidates based on reactivity, pot life, and final film characteristics.
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