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Highly versatile bisphenol-A based liquid epoxy resin with excellent reactivity toward amine and anhydride curing agents.
Low viscosity (10,000–12,000 cP at 25°C) enabling easy processing, impregnation, and mixing without solvent addition.
Superior mechanical strength and chemical resistance after full cure, especially to alkalis and mild acids.
Excellent adhesion to metals, composites, and concrete substrates under ambient or elevated temperature curing conditions.
Consistent batch-to-batch quality with low chloride content (< 500 ppm), ensuring reliability in high-performance composite and coating systems.
Structural adhesive formulations for automotive and aerospace bonding applications.
Matrix resin in fiber-reinforced polymer (FRP) composites for wind turbine blades and marine components.
High-performance protective coatings for industrial steel structures and offshore platforms.
Electrical encapsulation and potting compounds requiring thermal stability and dielectric integrity.
Self-leveling flooring systems demanding abrasion resistance and seamless finish.
| Chemical Type | Bisphenol-A epoxy resin |
| Product Form | Liquid |
| Appearance | Pale yellow transparent liquid |
| Epoxy Equivalent Weight (EEW) | 185–192 g/eq |
| Viscosity (25°C) | 10,000–12,000 cP |
| Chloride Content | < 500 ppm |
| Softening Point | 12–16°C |
| Storage Stability | ≥ 12 months at ≤ 25°C in sealed containers |
Q1: What is the primary functional role of KD-428 in epoxy formulations?
A: KD-428 is a reactive diluent designed to reduce viscosity and improve processability of standard bisphenol-A or bisphenol-F based epoxy resins without significantly compromising final crosslink density or thermal performance.
Q2: Is KD-428 suitable for high-gloss, low-VOC coating systems?
A: Yes — KD-428 is commonly selected in premium industrial and protective coatings where reduced VOC content, improved flow/leveling, and retention of mechanical integrity are required. It participates fully in the curing reaction, minimizing volatile emissions.
Q3: How does KD-428 compare to non-reactive diluents in terms of film properties?
A: Unlike non-reactive diluents, KD-428 becomes an integral part of the cured network, helping maintain hardness, chemical resistance, and adhesion — while still delivering effective viscosity reduction during processing.
Q4: Can KD-428 be used in combination with amine or anhydride hardeners?
A: Yes — KD-428 is compatible with common epoxy hardeners including aliphatic and aromatic amines, as well as acid anhydrides. Optimal stoichiometry and cure schedule should be confirmed through small-scale formulation trials.
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