ACR impact modifier is an acrylic copolymer with a core-shell structure, which plays multiple key roles in plastic processing such as PVC
1. Impact resistance enhancement
By inducing silver lines and shear bands through the core layer elastomer, the impact energy is absorbed, significantly improving the impact strength of the product (especially in low-temperature environments); The core-shell structure design can increase the impact strength by more than 6 times and maintain 90% toughness at -40 ℃
2. Optimization of processing performance
Promote PVC plasticization, shorten processing time, improve melt flowability and stability; Reduce the phenomenon of melt fracture and improve the extrusion quality of complex cross-section profiles
3. Comprehensive performance improvement
Improve the surface smoothness of the product and eliminate defects such as fish eyes and flow marks; Enhance weather resistance, heat resistance, and chemical stability, especially suitable for outdoor products
4. Special application advantages
Excellent compatibility with PVC, evenly dispersed to avoid agglomeration; Compared to modifiers such as CPE, ACR has a wider processing temperature range and higher modification efficiency; Transparent ACR can maintain a light transmittance of over 85% and is suitable for transparent products; The typical addition amount is 0.5-5phr, and direct mixing with alkaline fillers should be avoided. At present, Bangtai Petrochemical ACR has become one of the preferred modifiers for hard PVC profiles, pipes, and engineering plastic alloys.
5. Choose the appropriate ACR model
Profile/Pipe: High molecular weight models are preferred, with a molecular weight greater than 500000, which can increase melt strength by more than 40% and effectively suppress extrusion melt fracture; Injection molded parts/thin-walled products: Low molecular weight models are recommended, with a molecular weight of 300000 to 500000 to reduce melt viscosity and increase filling speed by 25% -30%; Transparent products need to be combined with MBS (solubility parameter 9.4-9.5) for compound use, with a light transmittance of>85%
Post time: Jul-19-2025
