MR. JO JR-3013: Low-Viscosity Modified Epoxy Resin for Tile Grouts, Primers, and Coatings
MR. JO JR-3013: Low-Viscosity Modified Epoxy Resin for Tile Grouts, Primers, and Coatings
Introduction
In the formulation of primers, coatings, and tile grouts, viscosity control is one of the most critical parameters. Unmodified bisphenol-A (BPA) epoxy resins provide excellent adhesion and durability but are typically too viscous for thin-film or highly filled applications. This leads formulators to rely on external reactive diluents — which can introduce variability in performance and processing.
JR-3013 solves this problem. It is a bisphenol-A epoxy resin modified with a mono-functional aliphatic reactive diluent, designed to offer very low viscosity while retaining the performance benefits of epoxy chemistry. With an EEW of 185–195 g/eq and a viscosity of just 250–500 mPa·s at 25 °C, JR 3013 is among the lowest-viscosity resins in the JPOXY portfolio.
Comparable to Araldite GY 9513, JR 3013 offers a reliable alternative for formulators seeking consistency, cost efficiency, and process-friendly epoxy systems.
Key Technical Features
- Modified resin: BPA epoxy resin integrated with mono-functional aliphatic reactive diluent.
- Viscosity: 250–500 mPa·s @ 25 °C — exceptionally low for easy processing.
- Epoxy Equivalent Weight (EEW): 185–195 g/eq.
- Color: Gardner ≤0.5, ensuring high clarity.
- Density: 1.00–1.10 g/cc @ 25 °C.
- Appearance: Clear liquid, excellent pigment and filler acceptance.
Why Choose JR 3013?
- Ultra-Low Viscosity
JR 3013 dramatically reduces mixing energy and allows for easy incorporation of fillers and pigments, making it particularly suited for tile grout systems and thin-film coatings. - Consistent Quality
By building the reactive diluent into the resin backbone, JR 3013 avoids the inconsistencies of manual dilution, delivering uniform viscosity and performance across batches. - High Compatibility
Works seamlessly with polyamines, polyamides, cycloaliphatic amines, and other standard curing agents, allowing formulators to tune flexibility, hardness, or chemical resistance. - Versatility Across Applications
JR 3013 is suitable for construction chemicals, flooring primers, and industrial coatings, making it a versatile “go-to” resin for low-viscosity epoxy requirements.
Applications
- Tile Grout Systems
- Low viscosity ensures excellent penetration into tile joints, improving adhesion and water resistance.
- Enhances flow and reduces void formation in grouting applications.
- Epoxy Primers
- Ideal for concrete and masonry primers, where surface wetting and deep penetration are key to long-term durability.
- Promotes adhesion between substrate and subsequent coatings or screeds.
- Coatings
- Suitable for thin-film and high-solid coatings, where a low-viscosity resin enables higher filler loading and better leveling.
- Ensures smooth film formation and minimizes bubble entrapment.
Commercial Equivalents
JR 3013 is similar to Araldite GY 9513, giving formulators confidence in performance benchmarks and making it easy to adapt existing recipes with minimal reformulation.
Processing and Formulation Notes
- JR 3013 is highly compatible with epoxy-compatible fillers such as silica flour, quartz, and graded sands.
- Can be used with 4–6x filler loadings (by liquid volume) in grout or mortar applications.
- Pigments disperse easily due to the resin’s low viscosity.
- As with all epoxy systems, UV protection or topcoating is recommended for outdoor use.
Conclusion
JR 3013 offers a unique balance of low viscosity, clarity, and performance, making it a top choice for tile grouts, epoxy primers, and coatings. Its built-in reactive diluent eliminates the need for external viscosity modifiers, simplifying formulation while ensuring consistent results.
For formulators seeking a dependable, drop-in solution with performance comparable to Araldite GY 9513, JR 3013 is a smart and practical choice. It delivers the strength of epoxy chemistry with the ease of processing that modern construction and coating applications demand.
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