ACM impact modifier for PVC profile

ACM impact modifier, a high-performance core-shell structured copolymer synthesized by grafting lightly chlorinated polyethylene and acrylate polymers, has become an ideal functional additive for upgrading rigid PVC profile products, effectively solving the inherent shortcomings of traditional PVC materials such as brittleness, poor low-temperature toughness and insufficient weather resistance. Different from conventional impact modifiers like CPE, ACM modifier features a unique interpenetrating network structure and saturated acrylate chain segments, which enables it to disperse uniformly in micron scale within the PVC resin matrix during extrusion and molding of PVC profiles. When the profile is subjected to external mechanical impact, the elastomeric ACM micro-particles can serve as stress concentration points, inducing tiny uniform deformation in the surrounding rigid PVC matrix, efficiently absorbing and dissipating impact energy, and inhibiting the generation and expansion of internal cracks, thereby significantly improving the impact strength and fracture toughness of PVC profiles without damaging their original rigidity, dimensional stability and tensile properties.