Blog

MR. JO JR 3011: Modified Epoxy Resin for High-Solids Coatings and Waterproofing Applications

Introduction

In modern industrial applications, formulators are often faced with a trade-off: balancing processability with performance. Conventional unmodified bisphenol-A epoxy resins such as JPOXY JR 3000 or JR 3010 deliver excellent mechanical and chemical resistance, but their relatively high viscosity can pose challenges in high-solids formulations, solvent-reduced coatings, or systems where ease of application is critical.

JR 3011 bridges this gap. It is a bisphenol-A epoxy resin modified with a mono-functional aliphatic reactive diluent, engineered to provide lower viscosity, easier handling, and better film formation—without the formulator needing to add external diluents at the mixing stage. With an EEW of 180–200 g/eq and a viscosity range of 4,500–6,500 mPa·s at 25 °C, JR 3011 sits comfortably in the mid-viscosity segment, offering versatility across coatings, waterproofing, and adhesive applications.

Comparable to Araldite GY 255, JR 3011 combines consistency with convenience, making it a preferred choice for formulators who want a reliable modified resin base.

Key Technical Features

• Pre-modified resin: Contains mono-functional aliphatic reactive diluent chemically integrated with BPA epoxy resin.
• Viscosity range: 4,500–6,500 mPa·s at 25 °C, significantly lower than unmodified grades (~10,000–12,000 mPa·s).
• Epoxy Equivalent Weight (EEW): 180–200 g/eq, ensuring compatibility with a wide range of curing agents.
• Color stability: Gardner ≤0.5, offering clear and consistent appearance for pigmented or transparent systems.
• Density: 1.10–1.18 g/cc at 25 °C, consistent with high-purity liquid epoxy resins

Applications:

1. High-Solids Coatings
   • JR 3011 is ideal for developing protective and industrial coatings where high solids content is required for VOC compliance.
   • Its lower viscosity enables the formulation of spray-able, brush-able, or roller-applied coatings without compromising on film build or protective properties.
2. Waterproofing Systems
   • Used in liquid-applied membranes and barrier coatings, JR 3011 provides excellent adhesion to concrete, metal, and masonry substrates.
   • Its balanced reactivity ensures good cure even under variable site conditions, while maintaining flexibility and durability in service.
3. Adhesives and Sealants
   • JR 3011 can serve as a base resin for structural and construction adhesives where flowability and substrate wetting are critical.
   • Its compatibility with fillers and modifiers enables wide adaptability in adhesive systems.
4. General Purpose Epoxy Systems
   • Suitable for primers, flooring binders, and general maintenance coatings.
   • Offers an excellent balance of cost-effectiveness and performance.

Commercial Equivalents

For formulators familiar with global benchmarks, JR 3011 is similar to Araldite GY 255 and can be considered in formulations that require comparable performance. This positioning helps ensure seamless substitution or parallel use in global supply chains.

Conclusion

JR 3011 represents a well-engineered balance between viscosity reduction and epoxy performance. As a pre-modified resin with integrated reactive diluent, it provides convenience, consistency, and versatility to formulators working in coatings, waterproofing, adhesives, and construction applications.

By eliminating the need for external viscosity adjustments during formulation, JR 3011 not only saves time but also delivers a reliable foundation for high-performance epoxy systems. For industries seeking efficiency without compromise, JR 3011 is a dependable choice.