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SIS (styrene-isoprene-styrene blockcopolymer) is an ideal material foradhesives,coatings and plastic modification,and also a major raw material for new-gen-eration pressure sensitive adhesives,hotmelt adhesives and sealants.China did not start research in SIS untilthe mid-1980s and commercial tests beganin the mid-1990s.The main reason was thatC5 separation started very late and therewas a shortage of polymerization-gradeisopentadiene monomer.The only sourceof polymerization-grade isopentadiene at
SIS (styrene-isoprene-styrene block copolymer) is an ideal material foradhesives, coatings and plastic modification, and also a major raw material for new-gen-eration pressure sensitive adhesives, hotmelt adhesives and sealants. China did not start research in SIS until the mid -1980s and commercial tests beganin the mid-1990s.The main reason was thatC5 separation started very late and therewas a shortage of polymerization-gradeisopentadiene monomer. The only sourceof polymerization-grade isopentadiene at