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Metablen S-2501 is an upgraded silicone-acrylic core-shell modifier in the S series, building on S-2001's weatherability and low-temperature impact resistance, with enhanced hydrolysis resistance and damp-heat resistance for engineering plastics in humid or high-moisture environments.
Silicone-acrylic core-shell structure, inheriting S-series weatherability and low-temperature impact resistance
Added excellent hydrolysis and damp-heat resistance for stable performance in humid environments
Good compatibility with PC, PC alloys, PVC and other substrates; strong processing adaptability
A comprehensive performance model balancing impact resistance, weatherability and hydrolysis resistance
PC/PC alloy modification in humid/high-moisture conditions (bathroom components, outdoor electronic enclosures)
Engineering plastic parts requiring hydrolysis resistance (waterproof home appliance components, automotive wading parts)
Long-term weatherable and moisture-resistant PVC outdoor products (water supply/drainage pipes, decorative profiles)
| Product Information | |
| Brand/Model | Mitsubishi Metablen S-2501 |
| Type | Silicone-Acrylic Impact Modifier |
| Performance & Compatibility | |
| Core Performance | Weatherability, Low-Temperature Impact, Hydrolysis Resistance |
| Compatible Resins | PC, PVC, ABS, PEs, PA |
| Packaging & Storage | |
| Packaging | 20 kg/bag |
| Storage | Cool/dry place, seal after opening |
Q1: What is the primary polymer matrix compatibility of Mitsubishi S-2501?
A: Mitsubishi S-2501 is specifically engineered for use in rigid PVC formulations, where it enhances impact resistance without significantly compromising stiffness or thermal stability. It may also be compatible with certain styrenic systems and engineering thermoplastics when evaluated in context-specific trials.
Q2: How does S-2501 affect processing behavior during extrusion or injection molding?
A: S-2501 generally supports smooth melt flow and exhibits good thermal stability under typical PVC processing conditions. It does not introduce significant viscosity spikes and helps maintain consistent output rates and surface finish in profiles, sheets, and rigid molded parts.
Q3: Is S-2501 suitable for applications requiring weather resistance or long-term outdoor exposure?
A: Yes — S-2501 contributes to improved retention of impact strength after UV exposure and thermal aging in PVC-based exterior products, such as window profiles and siding, due to its stabilized acrylic core-shell architecture.
Q4: What is the typical dosage range for optimal performance in rigid PVC compounds?
A: Dosage depends on formulation requirements and target performance, but S-2501 is typically used at low concentrations — generally ranging from 0.1% to 2% by weight relative to the base resin — to achieve balanced toughness, processability, and dimensional stability.
Q5: Does S-2501 require special handling or drying prior to use?
A: S-2501 is supplied as a free-flowing powder with low moisture sensitivity. Standard storage in a cool, dry environment is sufficient; pre-drying is not routinely required for most PVC processing operations unless ambient humidity is exceptionally high or extended residence times are involved.
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