RAFT AGENT, POLYMERIZATION METHOD, POLYMER, RUBBER MIXTURE, AND USE THEREOF

The invention relates to a RAFT agent, a method for polymerizing alkenes and/or dienes and/or vinyl compounds and/or vinylidene compounds using at least one RAFT agent, a polymer synthesized using said method, a sulfur cross-linkable rubber mixture, and the use of the sulfur cross-linkable rubber mixture for manufacturing pneumatic vehicle tires, straps, belts or tubes. According to a preferred embodiment, the RAFT agent is represented by formula Z-C(=S)-S-R-S-P (I), where Z is a Z group typical for RAFT polymerization, R is an R group typical for RAFT polymerization, C is a carbon atom, S isa sulfur atom, and P is a protective group selected from among the group comprising: S(=0)2-R1, where R1 = alkyl, benzyl or phenyl; and/or S-C(=S)-N-R2R3, where R2 and R3 = alkyl, benzyl or phenyl; and/or C(=0)-R4, where R4 = alkyl; and/or N-R5R6, where R5 = hydrogen atom (H), alkyl, benzyl or phenyl and R6 = alkyl, benzyl or phenyl; and/or SiR7R8R9, where R7, R8 and R9 = alkyl or benzyl; and/or S(=0)2-OM, where M = Na, K