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SK POE851L is an ultra-low density POE with high elasticity, excellent low temperature resistance and low shrinkage, significant toughening effect, suitable for multi-field modification and molding.
Significant toughening effect, greatly improving the toughness and impact resistance of substrates, suitable for high durability application environments
Excellent low temperature resistance, glass transition temperature of -53℃, stable performance without embrittlement in low temperature environment
Low shrinkage rate, effectively ensuring the dimensional stability of products, suitable for precision molding requirements
Good processability with excellent fluidity, fast mold filling in injection molding, shortening production cycle and improving efficiency
Automotive Industry: Impact modification of bumpers, instrument panels and other parts, high impact resistance and dimensional stability
Electrical Industry: Electrical insulation parts and connectors, stable performance, improving product durability
Cable Industry: Insulation and sheathing layers of wires and cables, excellent insulation and wear resistance, suitable for wiring protection
| Physical Properties | |
| Density | 0.857 g/cm³ |
| Shore A Hardness | 55 (ASTM D2240) |
| Shore D Hardness | 12 (ASTM D2240) |
| Melt Flow & Thermal Properties | |
| Melt Flow Rate (190°C/2.16kg) | 1.0 g/10 min (ASTM D1238) |
| Glass Transition Temperature | -53 °C |
| Mechanical Properties | |
| Tensile Strength | 6.08 MPa (ASTM D638) |
| Elongation at Break | 1000 % (ASTM D638) |
Q1: What is the primary polymer matrix compatibility of SK Chemicals 851L?
A: SK Chemicals 851L is specifically engineered for compatibility with rigid PVC formulations, including unplasticized (uPVC) and chlorinated polyvinyl chloride (CPVC) systems. It demonstrates good dispersion and interfacial adhesion in these matrices without compromising thermal stability during processing.
Q2: How does 851L affect the processing behavior of PVC compounds?
A: 851L typically supports stable extrusion and injection molding performance in rigid PVC. It does not significantly increase melt viscosity at recommended dosage levels and maintains consistent torque profiles during compounding—contributing to reliable output rates and reduced die buildup in profile extrusion.
Q3: Can 851L be used in applications requiring weather resistance or long-term outdoor exposure?
A: Yes—851L is formulated to retain impact performance under UV exposure and thermal cycling when incorporated into properly stabilized PVC compounds. Its contribution to low-temperature toughness remains effective in window profiles, siding, and other exterior building products where impact resistance must be maintained over service life.
Q4: What is the typical dosage range for optimal impact enhancement?
A: Dosage depends on formulation requirements and target performance, but 851L is generally used at low concentrations—typically ranging from 0.1% to 2% by weight relative to the PVC resin—to achieve balanced improvements in notched Izod impact strength without sacrificing rigidity or surface quality.
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