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Highly efficient epoxy-functional chain extender for polyesters and polyacrylates.
Enables precise molecular weight control and improved melt strength in reactive extrusion processes.
Offers excellent thermal stability with minimal volatiles generation during processing.
Compatible with a broad range of thermoplastic polymers, including recycled PET and bio-based polyesters.
Supports low-temperature reactivity, facilitating energy-efficient compounding and recycling operations.
Enhancement of recycled PET (rPET) for food-contact packaging films and bottles.
Stabilization and rheology modification of engineering thermoplastics in automotive components.
Performance improvement of biodegradable polyesters (e.g., PBAT, PCL) in flexible packaging.
Chain extension of waterborne acrylic dispersions for high-performance industrial coatings.
| Chemical Type | Epoxy-functional multi-arm polymer |
| Product Form | Powder |
| Appearance | Free-flowing white to off-white granular powder |
| Primary Applications | Chain extension, branching, and crosslinking of polyesters, polyacrylates, and polyurethanes |
| Key Features | Reactive functionality: ≥3 epoxy groups per molecule; low dust generation |
| Benefits | Improved melt viscosity, enhanced mechanical properties, compatibility with high-shear extrusion |
| 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 eyes/skin |
Q1: What is the primary function of Joncryl ADR 4368C in polymer systems?
A: Joncryl ADR 4368C 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, polyacrylates, and other condensation polymers.
Q2: Which polymer types is Joncryl ADR 4368C most commonly used with?
A: It is widely applied in post-consumer and post-industrial PET and PBT recycling streams, as well as in acrylic dispersions and certain polyurethane dispersions where controlled branching or crosslink density enhancement is required.
Q3: How is Joncryl ADR 4368C typically incorporated into a formulation?
A: It is generally added during melt compounding or extrusion—either directly as a solid powder or pre-blended with polymer flakes—and reacts in situ under processing conditions. Dosage depends on formulation requirements but is typically used at low concentrations to achieve targeted rheological and mechanical improvements.
Q4: Does Joncryl ADR 4368C affect thermal stability or processing window?
A: When used within recommended dosage ranges, it does not significantly reduce thermal stability. However, excessive addition may promote premature crosslinking; therefore, optimal use requires balancing reaction kinetics with residence time and temperature profiles during extrusion.
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E-mail: wangxingqiang@ericwchem.com
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