MR. JO JR 3003 — High-Viscosity Unmodified Epoxy for Adhesives & Decoupage Coatings
MR. JO JR 3003 — High-Viscosity Unmodified Epoxy for Adhesives & Decoupage Coatings
Technical snapshot
- Type: Unmodified BPA epoxy resin (resin-only)
- EEW: 200–230 g/eq
- Viscosity: 20,000–40,000 mPa·s (high)
- Packs: 10 / 20 / 30 kg and barrels; long shelf stability
Primary problem addressed
Many adhesive and decorative coating tasks require body — the ability to stay where applied, bridge gaps and avoid sag on vertical or ornate surfaces. Low-viscosity resins demand thickeners or complex additives to achieve that behavior; JR-3003 provides intrinsic high body so formulators and applicators spend less time chasing viscosity.
Why JR 3003 works
- High intrinsic viscosity gives immediate anti-sag and bead retention without heavy thickeners.
- Higher EEW provides a different reactive baseline useful when pairing with specific hardener classes to reach desired mechanical attributes.
- Formulator-friendly: accepts fillers and pigments while retaining body, which is advantageous for bonding pastes and brushable coatings.
Typical applications
- Structural and gap-filling adhesives for wood, metal and composites
- Decoupage coatings and decorative builds that require thick, brushable layers
- Adhesive mortars and non-running bond pastes where minimal slump is critical
Job-ready workflow
- Select hardener: determine pot life and final properties; polyamidoamines or polyamines are common pairings.
- Pre-condition resin: JR-3003 can be warm-blended slightly (<35 °C) if needed to ease mixing with hardener.
- Weigh & mix: measure precisely; due to high viscosity use mechanical mixers at low speed and scrape vessel walls thoroughly.
- Modify only if needed: to increase thixotropy, add controlled fumed silica; to lower viscosity, consider a tested reactive diluent.
- Apply: use spatulas, bead guns or pumps designed for viscous fluids. For vertical work, apply in layers rather than one thick coat where appropriate.
- Cure & post-cure: observe pot life limits; large masses risk local heat rise — control batch sizes.
Formulation & handling tips
- Use heated transfer lines or gentle warming for pumpability in cold environments.
- Pre-blend fillers into Part A (resin) to maintain consistency.
- Monitor mixed mass temperature; high viscosity + large volume = exotherm risk.
Troubleshooting
- Too stiff to mix: warm resin gently or reduce filler content.
- Short pot life / overheating: batch too large or ambient high; use smaller batches.
- Poor wetting with heavy fillers: pre-disperse fillers in small resin portion before full mix.
Choose JR 3003 when body and anti-sag matter more than ease of degassing. It simplifies adhesive formulation and vertical décor work.
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