Graft copolymer, its preparation and its use

摘要

Production of halo- or chlorosulfonyl-functional polymers (I) comprises radical polymerization of an aromatic monomer (IIa), a halo- or chlorosulfonyl-functional monomer (IIb) and another monomer (IIc). Production of halo- or chlorosulfonyl-functional polymers (I) comprises radical polymerization of a monomer of formula (IIa), a halo- or chlorosulfonyl-functional monomer (IIb) and another monomer (IIc). R1-R4 = H or optionally substituted alkyl, cycloalkyl, aralkyl or aryl, at least two being aryl, or R1+R2 or R3+R4 is an aryl-substituted functional group having a carbon-heteroatom multiple bond conjugated with the C=C group. Independent claims are also included for: (1) polymers (I) produced as above; (2) production of graft copolymers by reacting (I) with monomers; (3) graft copolymers produced as above.