Introduction to ASA

The microstructure of acrylonitrile/styrene/acrylate graft copolymer (ASA) is that acrylic rubber (PBA) particles are dispersed in the continuous phase of styrene-acrylonitrile copolymer (SAN) to form a "sea-island" structure. In terms of molecular structure, it is a core-shell structure graft copolymer, with polyacrylate (PBA) rubber phase as the core; styrene and acrylonitrile grafted on the rubber phase as the shell layer, the core has a toughening effect, and the shell The layer plays a role of compatibilization. ASA combines the gloss and ease of processing of polystyrene resin, the mechanical properties and corrosion resistance of acrylonitrile resin, and the excellent impact resistance and weather resistance of acrylic rubber. ASA has similar structure and performance to ABS, but ASA does not contain unsaturated double bonds and has excellent weather resistance. Even if exposed to ultraviolet rays, outdoors, rain, humidity, light and ozone for a long time, it can be coated without coating. Keep physical properties stable. It has good weather resistance and is widely used in automotive parts, electronic and electrical equipment, outdoor building materials, door and window building materials and other fields. The development and application of mixed gold of ASA resin and PVC, PC, PBT, PMMA, PA and other materials have received widespread attention.