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    • 4. 发明授权
    • Production of copolymers of .alpha.-methylstyrene
    • 生产α-甲基苯乙烯的共聚物
    • US4647632A
    • 1987-03-03
    • US782604
    • 1985-09-30
    • Duane B. Priddy
    • Duane B. Priddy
    • C08F4/08C08F212/12
    • C08F212/12
    • Copolymers of alpha-emthylstyrene and its like alkenyl aromatic monomers containing alpha-methyl substitution in the alkenyl portion of the monomer molecule (to provide alpha-methyl-alkenyl aromatic), particularly the copolymers of .alpha.-methylstyrene with styrene, which exhibit excellent homogeneity are produced with anionic catalyst initiation in, most advantageously, solution systems using intensive backmixing, recirculatory sorts of reactor unit apparatus in which to conduct the copolymerization by continuously charging a feed stream to the reactor of the mixed monomers to be copolymerized in which the ratio of .alpha.-methylalkenyl aromatic monomer to sytrene or other non-.alpha.-methyl-containing-alkenyl aromatic monomer is kept in unusually low relative proportions while keeping the reaction mass in which the copolymer is being formed in nicely homogeneous mixture.
    • 在单体分子的烯基部分(以提供α-甲基 - 链烯基芳族化合物),特别是α-甲基苯乙烯与苯乙烯的共聚物中,α-乙烯基苯乙烯及其类似烯基芳族单体的共聚物在单体分子的链烯基部分中具有优异均匀性的共聚物是 由阴离子催化剂起始制备,最有利的是使用密集回混的溶液体系,再循环型反应器单元装置,其中通过将进料流连续加入待共聚的混合单体的反应器进行共聚,其中α 甲基链烯基芳族单体与苯乙烯或其它非α-甲基链烯基芳族单体保持相当低的相对比例,同时保持共聚物形成在良好均匀的混合物中的反应物质。