New amphiphilic copolymer used as adhesive, emulsifying agent or an absorbent, comprises maleinized styrene-ethylene-butylene-styrene copolymer with grafted hydrophilic groups

摘要

Amphiphilic ABA block copolymers comprises: (a) two terminal thermoplastic poly(styrene) blocks A; and (b) central elastomeric block B, which is a poly(ethylene-butylene) sequence with grafted hydrophilic groups. Amphiphilic ABA block copolymers comprises: (a) two terminal thermoplastic poly(styrene) blocks A; and (b) central elastomeric block B, which is a poly(ethylene-butylene) sequence with grafted hydrophilic groups. The ABA copolymer is of formula (I). R1 and R2 = a hydrophilic group with average molecular weight of less than 10000 selected from (IIa), (IIb) and (IIc). (IIa) is CH3-O-(CH2-CH2-O)n, (IIb) is HO-(CH2-CH2-O)n, and (IIc) is HO-(CH2-CH2-O)a-(CH(CH3)-CH2-O)b-(CH2-CH2-O)a. n, a and b = a whole number. An Independent claim is also included for a process for manufacturing copolymer ABA.