PVC processing aids

PVC is a very special thermoplastics, it is easy to decompose the pure resin processing, poor mobility, low impact strength, poor weather resistance and therefore require in the plastic flame retardant  process to add various auxiliary materials to improve their performance. Such as: lubricants, heat stabilizers, impact modifiers, processing aids. Processing aids in the development and application process, by product ingredients can be divided into the following broad categories: methyl methacrylate (MMA) / acrylate copolymer, MMA / styrene copolymer, acrylonitrile / styrene, etc., currently Use the largest, the best is MMA / acrylate copolymer. 2, the role of
Processing aids (Processing Aid) main role is to:
1) to accelerate the flame retardant  process of PVC plastics.
2) to improve the rheological properties of the thermoplastic melt.
3) improve the thermo-elastic mechanical properties of the melt state.
4) improve the quality of products, the appearance of the other integrated functions.
Although the processing aid added is less, but to improve the performance of PVC processing is very important. Impact modifier and  barium stearate processing aid ACR ACR are acrylate polymer, but because of the different formulations performance ratio and different structures, impact the ACR about 10-20% of methyl methacrylate and acrylic acid about 80-90% esters. MBS impact modifier ACR as the same as the core-shell structure. And MBS, CPE impact modifiers, etc. compared to the processability and weather resistance, good surface finish, especially for outdoor goods, in foreign countries, acrylic impact modifiers because environmental protection, excellent performance, weather has been replaced by high-performance CPE impact modifier.