POLYMERS CONTAINING PENDANT THIURAM DISULFIDE FUNCTIONS; PROCESS FOR PREPARING THE SAME AND THEIR USE FOR MANUFACTURING GRAFTED COPOLYMERS

摘要

ABSTRACT OF THE DISCLOSURE: These polymers are formed by a sequence of units: (I) this sequence may contain, randomly distributed, of other units derived from at least one vinyl monomer, R 1 = H; alkyl, cycloalkyl or aryl optionally substituted with at least one halogen; ? - - O-R7 (R7 = H, alkyl, aryl or cycloalkyl): A = single bond; alkylene, cycloa-lkylène or arylene; or - - OB (B = alkylene, cycloalkylene or arylene); R2, R3 and R4 = alkyl, cyclo-alkyl or aryl; at least one of R3 and R4 may additionally bear at least one hydroxyl or acid or represent a polyoxyethylene sequence or polyester. These polymers are used as basis for the preparation of graft copolymers comprising the units of formula: (VI) having symbols such as described above and where Po = vinyl or diene polymer block, and other vinyl units. These graft copolymers are particularly useful as compatibilizers.