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Highly efficient multifunctional epoxy-based chain extender for polyesters and polyacrylates.
Enables significant molecular weight build-up with minimal viscosity increase during processing.
Improves melt strength, thermo-mechanical stability, and film integrity in extrusion and blow molding.
Compatible with a broad range of reactive polymers including PET, PBT, and bio-based polyesters.
Low volatility and excellent thermal stability up to 280 °C, supporting high-output processing.
Recycled PET (rPET) upgrading for food-contact packaging films and bottles.
Enhancement of engineering thermoplastics in automotive interior components.
Chain extension of biodegradable polyesters (e.g., PLA, PBAT) for flexible packaging.
Improving drawability and dimensional stability in monofilament and synthetic fiber production.
Stabilization of reactive extrusion processes for polymer blends and compatibilized alloys.
| Chemical Type | Multifunctional epoxy resin |
| Product Form | Pale yellow to amber granules |
| Appearance | Free-flowing, non-dusting granules |
| Primary Applications | Polyester and polyacrylate chain extension, rPET upgrading, reactive extrusion |
| Key Features | Epoxy functionality ≥ 3.5; low monomer content; high thermal stability |
| Benefits | Improved melt strength, enhanced mechanical properties, reduced gel formation |
| Storage Conditions | Store in original sealed container at 15–25 °C, protect from moisture |
| Handling Precautions | Use in well-ventilated areas; avoid inhalation of dust and contact with skin/eyes |
Q1: What is the primary function of Joncryl ADR 4300-F in polymer systems?
A: Joncryl ADR 4300-F is a multifunctional epoxy-based chain extender designed to increase molecular weight and improve melt strength, viscosity, and mechanical performance—particularly in recycled or degraded polyesters, acrylics, and other condensation polymers.
Q2: Which polymer types is Joncryl ADR 4300-F most commonly used with?
A: It is widely applied in PET, PBT, and other polyester resins—including post-consumer recycled (PCR) PET—where it helps restore molecular weight and processability. It also shows compatibility with certain acrylic dispersions and functionalized polyolefins in reactive compounding.
Q3: How is Joncryl ADR 4300-F typically incorporated into formulations?
A: It is generally added during melt compounding or extrusion, either as a neat liquid or pre-diluted in a carrier resin. Dosage depends on formulation requirements but is typically used at low concentrations to achieve effective chain extension without excessive crosslinking.
Q4: Does Joncryl ADR 4300-F affect thermal stability or processing window?
A: When processed within recommended temperature ranges (typically below 280 °C), it exhibits good thermal stability and minimal volatiles evolution. Its reactivity is tuned to favor chain extension over premature gelation, supporting robust extrusion and injection molding performance.
Q5: Is Joncryl ADR 4300-F suitable for food-contact or regulated applications?
A: While not pre-approved for direct food contact itself, Joncryl ADR 4300-F is frequently used in food-grade recycled PET applications where final compliance is determined by the full formulation and processing conditions—including migration testing of the finished article.
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E-mail: wangxingqiang@ericwchem.com
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