Acrylic Impact Modifier

Product Overview

Acrylic Impact Modifier is a high-performance core-shell structured acrylic copolymer, specially developed to deliver long-lasting weathering resistance and ultra-stable low-temperature toughness for rigid PVC systems. Unlike general-purpose impact modifiers, its fully saturated molecular structure eliminates unsaturated double bonds, making it highly resistant to UV degradation, ozone aging and long-term outdoor exposure.

Key Specifications

Core Features

1. ‌Industry-Leading Long-Term Weatherability‌: No unsaturated double bonds in molecular structure, effectively prevents PVC exterior products from chalking, discoloration and embrittlement after years of UV exposure, fully meets ASTM D4279 outdoor durability standards.

2. ‌High Efficiency Impact Enhancement‌: Even at low addition levels, it forms a uniform elastic network inside PVC matrix, significantly improves notched Izod impact strength, and maintains excellent dimensional stability of finished products.

3. ‌Excellent Processing & Surface Performance‌: Optimized shell structure delivers perfect rheological compatibility with PVC resin, promotes homogeneous plasticization, reduces melt fracture, and helps achieve ultra-smooth, high-gloss product surfaces.

4. ‌Wide Formulation Compatibility‌: Shows stable miscibility with calcium zinc stabilizers, lead-based stabilizers, processing aids and other common PVC additives, no negative interaction with pigments, optical brighteners or UV absorbers in the system.

5. ‌Low Temperature Toughness Retention‌: Maintains consistent impact performance even at -20℃, prevents PVC exterior profiles and siding from cracking under extreme cold climate conditions in northern regions.

Recommended Applications

· PVC exterior wall siding, outdoor window and door profiles, fence systems

· PVC outdoor decorative panels, roofing sheets, rain gutters and downspouts

· PVC foam boards, exterior WPC profiles and outdoor playground plastic components

· PVC transparent and translucent outdoor lighting diffuser panels

· Other rigid PVC products requiring long-term outdoor weathering performance

Suggested Dosage

For standard PVC exterior profile and siding formulations, the recommended addition level is 5-7 phr. For high-weathering-demand products in strong UV radiation regions, the dosage can be adjusted to 7-9 phr to achieve optimal long-term toughness retention. It is recommended to conduct small-scale formulation trials on your existing production line to confirm the optimal loading.

Packaging & Storage

· ‌Packaging‌: 25kg net weight per inner PE-lined kraft paper bag.13tons/20'GP

· ‌Storage‌: Keep in cool, dry, well-ventilated warehouse, avoid direct sunlight, high temperature and moisture accumulation

· ‌Shelf Life‌: 18 months under recommended storage conditions