styrene-acrylonitrile copolymer Similar with Chemtura Blendex B-869 foam modifier for PVC product. To be used ABS ASA ... PC PBT Processing aid for ABS ZB-869 is styrene-acrylonitrile copolymer with ultra-high molecular weight which ... with similar processing function and lower cost. Quality Specification ItemZB-869 Inherent Viscosity [η], 2511~14Bulk Density, g/cm30.30~0.45Volatile ...