NOVEL BLOCK COPOLYMERS INCLUDING ACRYLO-NITRILE SEQUENCES AND SEQUENCES INCLUDING UNITS DERIVED FROM GLUTARIMIDE UNITS AND PROCESSES FOR PREPARING SAME

摘要

There is disclosed novel block copolymers formed of acrylonitrile sequences and sequences containing at least about 50 mole percent of acrylamide units and at most about 50 of units selected from the group consisting of carboxyl, ester, amide, hydrazide and hydroxylamide units and formed by reacting a block copolymer having acrylonitrile sequences and sequences of glutarimide units with a low molecular weight compound having a functional group selected from the group consisting of hydroxyl, primary amino, secondary amino, hydrazo and hydroxylamino group. The reaction is effected at a pH of about 7,5 and higher, preferably in the presence of a solvent and/or swelling agent.