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Highly concentrated UV stabilizer masterbatch for enhanced long-term polymer protection.
Excellent dispersion performance in polyolefin matrices including PP and HDPE.
Thermally stable formulation suitable for processing temperatures up to 260 °C.
Low migration and blooming resistance, ensuring surface integrity and aesthetic consistency.
Compliant with FDA 21 CFR §178.2010 for indirect food contact applications.
Automotive interior trim components exposed to sunlight and thermal cycling.
Outdoor agricultural films requiring extended UV resistance and weatherability.
Packaging films for pharmaceutical and food-grade containers.
Rotomolded tanks and industrial storage vessels.
Blown and cast polypropylene packaging tapes and labels.
| Chemical Type | Hindered amine light stabilizer (HALS) + UV absorber synergy |
| Product Form | Pellets |
| Appearance | Light beige free-flowing pellets |
| Carrier Resin | Homopolymer polypropylene (PP) |
| Active Content | 20 wt% UV stabilizer system |
| Density (g/cm³) | 0.90–0.92 |
| Melt Flow Rate (g/10 min, 230 °C/2.16 kg) | 25–35 |
| Recommended Dosage | 1.5–3.0 wt% in final compound |
Q1: What is the primary function of Koala UN 53 20 Masterbatch in polymer processing?
A: Koala UN 53 20 Masterbatch is designed to provide consistent ultraviolet (UV) stabilization and long-term thermal protection for polyolefin-based compounds, particularly during extrusion, injection molding, and blow molding processes.
Q2: Which polymer matrices is this masterbatch most commonly used with?
A: It is optimized for use in polypropylene (PP), polyethylene (PE), and their copolymers. Compatibility with thermoplastic elastomers (TPEs) and certain filled or recycled polyolefin systems has also been demonstrated under standard processing conditions.
Q3: How should Koala UN 53 20 be incorporated into a base resin?
A: It is typically introduced via gravimetric or volumetric dosing directly into the main feed throat of an extruder or injection molding machine. Pre-blending with the base resin using a high-speed mixer is recommended when precise dispersion is critical for thin-gauge or high-clarity applications.
Q4: Is Koala UN 53 20 suitable for food-contact or medical-grade applications?
A: While the masterbatch is formulated with non-migrating, high-molecular-weight stabilizers, its suitability for regulated applications depends on final formulation, processing history, and end-use compliance requirements. Customers must conduct full regulatory validation—including extractables testing—within their specific system before claiming food-contact or medical compliance.
Q5: What storage conditions are recommended to maintain product performance?
A: Store in original sealed packaging at temperatures between 5 °C and 30 °C, away from direct sunlight and sources of heat or humidity. Avoid prolonged exposure to ambient moisture, especially in high-humidity environments, to prevent potential agglomeration or handling issues during feeding.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
