SK Chemicals 7405 Impact Modifier

Features Of SK Chemicals 7405 Impact Modifier

1. Ultra-high flow and low viscosity, MFR 500g/10min, low melt viscosity, excellent process rheology, suitable for high-efficiency molding with multiple processes

2. High elasticity and toughness, excellent resilience and flexibility, able to withstand large deformation without cracking, with superior impact resistance

3. Outstanding low temperature resistance, Tg -57℃, maintaining good physical properties in a wide temperature range, no embrittlement at low temperatures

4. Low density and crystallinity, low specific gravity for lightweight products, good transparency, balancing light weight and appearance requirements

5. Wide processing adaptability, moldable by conventional thermoplastic processing equipment such as injection molding, extrusion, calendering and blow molding

Typical Applications Of SK Chemicals 7405 Impact Modifier

1. PP Modification: Special for PP toughening, improving high/low temperature impact strength, suitable for automotive bumpers, home appliance shells after modification

2. Automotive Field: Impact modification of bumpers, instrument panels and other parts, enhancing toughness and impact resistance

3. Wires & Cables: Core raw material for halogen-free flame retardant cable compounds, can be filled with a large amount of inorganic flame retardants with low change rate of hardness and strength

4. Hot Melt Adhesive: Replace EVA to produce high-grade hot melt adhesive, odorless, with excellent high-flow coating and wettability

Specifications Of SK Chemicals 7405 Impact Modifier

SK Chemicals 7405 Impact Modifier – Frequently Asked Questions (FAQ)

Q1: What is the primary polymer matrix compatibility of SK Chemicals 7405?

A: SK Chemicals 7405 is specifically engineered for compatibility with rigid PVC (uPVC) formulations, including those used in profiles, pipes, and sheets. It demonstrates excellent dispersion and interfacial adhesion in chlorinated polyethylene (CPE)-based systems and shows good performance in certain ABS and PC blends where improved low-temperature impact resistance is required.

Q2: How does SK Chemicals 7405 affect processing behavior during extrusion or injection molding?

A: SK Chemicals 7405 generally supports stable melt flow and contributes to consistent torque profiles in twin-screw extrusion. It does not significantly increase melt viscosity at typical dosage levels and helps maintain good dimensional stability in downstream processing—especially beneficial for high-output window profile lines and thin-walled pipe extrusion.

Q3: Is SK Chemicals 7405 suitable for applications requiring weathering resistance?

A: Yes—SK Chemicals 7405 is formulated to retain impact performance under prolonged UV exposure and thermal cycling. When compounded with appropriate stabilizer packages (e.g., HALS and UV absorbers), it supports long-term retention of notched Izod impact strength in outdoor uPVC applications such as siding and fencing.

Q4: What is the recommended dosage range for optimal impact improvement?

A: Dosage depends on formulation requirements and target performance, but SK Chemicals 7405 is typically used at low concentrations—generally ranging from 0.1% to 2% by weight relative to the base polymer—to achieve balanced toughness, stiffness, and surface quality without compromising clarity or thermal stability.