WSD CHEMICAL’s PVC impact modifiers are high-performance core-shell structured polymer additives dedicated to transforming inherently brittle rigid PVC into tough, impact-resistant finished products. Unmodified pure PVC typically suffers from low notched impact strength, easily cracking under external force or at low temperatures, which severely limits its application scenarios in construction and industrial fields. Our impact modifiers introduce flexible rubber phases that disperse evenly in the PVC matrix, effectively absorbing and dissipating impact energy through crazing and shear yielding mechanisms, significantly improving material toughness without compromising other core properties.

Our main product series cover three mainstream technical routes to meet diverse market demands: Chlorinated Polyethylene (CPE) 135A, a cost-effective grade widely used in general-purpose PVC profiles and pipes; MBS modifiers, which maintain excellent transparency while delivering high impact resistance, making them ideal for clear PVC sheets, bottles and transparent fittings; and ACR impact modifiers with advanced multi-layer core-shell structure, featuring ultra-low glass transition temperature in the rubber core and outstanding weather resistance, suitable for long-term outdoor products such as window profiles, exterior wall panels and outdoor pipelines.

These modifiers are extensively applied in UPVC drainage pipes, electrical conduits, door and window profiles, transparent rigid sheets, vinyl siding, injection-molded pipe fittings and decorative boards. Our formulations can help manufacturers achieve higher weld angle strength, better low-temperature drop resistance, reduced notch sensitivity and stable long-term mechanical performance. All products are supplied as free-flowing white powders in 25kg moisture-proof bags, stored in cool and dry conditions with a 24-month shelf life.