Process for producing multiblock copolymer and products produced thereby

摘要: The process disclosed herein involves the continuous preparation of a multiblock copolymer two monomers or more such as butadiene and styrene, isoprene, etc. This comprises alternate feeding first one monomer stream then another differing in composition from stream, each being interrupted while other is fed continually into polymerization system containing an anionic catalyst capable polymerizing said monomers. A product withdrawn at same rate total feed streams, thereby effecting continual flow through system. controlled to give desired molecular weight copolymer; size block by time respective concentration feed; number blocks alternating steps that are performed during residence