29-03-2018 дата публикации
Номер: US20180086865A1
Принадлежит:
Disclosed are RAFT agents, a method of polymerizing alkenes, dienes, vinyl compounds, and/or vinylidene compounds using at least one RAFT agent, polymers prepared by the methods, sulfur-crosslinkable rubber mixtures prepared by the methods, and motor vehicle tires, cords, belts, or hoses incorporating the sulfur-crosslinkable rubber mixtures. In one embodiment, the RAFT agent has the formula Z—C(═S)—S—R—S—P or P—S—Z—C(═S)—S—R—S—P, wherein P is a protecting group, and Z and R are typical RAFT Z and R groups. 1. A RAFT agent of formula I):{'br': None, 'Z—C(═S)—S—R—S—P,\u2003\u2003I)'}whereinZ is a Z group typical of RAFT polymerization,R is an R group typical of RAFT polymerization,C is a carbon atom,S is a sulfur atom,{'sub': 2', '2, 'sup': 2', '3', '4', '5', '6', '7', '8', '9, 'P is a protecting group selected from the group consisting of: S(═O)—R, S—C(═S)—N—RR, C(═O)—R, N—RR, SiRRR, and S(═O)—OM,'}{'sup': '1', 'R=alkyl, benzyl, or phenyl,'}{'sup': 2', '3, 'Rand R=alkyl, benzyl, or phenyl,'}{'sup': '4', 'R=alkyl,'}{'sup': '5', 'R=hydrogen atom (H), alkyl, benzyl, or phenyl,'}{'sup': '6', 'R=alkyl, benzyl, or phenyl,'}{'sup': 7', '8', '9, 'R, Rand R=alkyl or benzyl, and'}M=Na, K, or H.4. The RAFT agent of claim 1 , a) phenyl,', 'b) phenoxy,', 'c) alkoxy (O-alkyl) having 1 to 30 carbon atoms, wherein the alkyl is branched or unbranched,', 'd) alkyl having 1 to 30 carbon atoms, wherein the alkyl is branched or unbranched,', 'e) S-alkyl having 1 to 30 carbon atoms, wherein attachment to the —C(═S)—S—R—S—P radical of the RAFT agent is via the sulfur atom, and wherein the alkyl is branched or unbranched,', 'f) a heterocyclic group,', 'g) alkyl(phenyl)amino, wherein alkyl is 1 to 30 carbon atoms, wherein attachment to the —C(═S)—S—R—S—P radical of the RAFT agent is via the nitrogen atom, and wherein the alkyl is branched or unbranched, and', 'h) dialkylamino, wherein alkyl is 1 to 30 carbon atoms, wherein each alkyl is independently branched or unbranched, wherein ...
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