... :KM355,IM808A,FM-50 It is fit for outdoor rigid PVC product. High impact and weatherability AIM ZB-21 ZB-50It shows ... ≥17.010 ≥9.0 ≥10.0 Corresponding Grade Company GradeHuaxingZB-21 ZB-50 KanekaFM-22 FM-21FM-50Rohm & HaasKM-355 KM-334AtofinaD ... ChemIM-808AMit.RayonW-450A,W-300A Acrylic Impact Modifier ZB-21, ZB-50