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    • 53. 发明公开
    • Process for the bromination of polystyrenes
    • Verfahren zum Bromieren von Styrenpolymerisaten。
    • EP0047549A2
    • 1982-03-17
    • EP81200922.3
    • 1981-08-19
    • FERRO CORPORATION
    • Barda, Henry James
    • C08F8/20
    • C08F8/20C08F112/08
    • The present process is one for the production of brominated styrene oligomers and polystyrene, preferably what are essentially tribrominated polystyrenes.
      One preferred embodiment of the process can be summarized as consisting of:

      1. dissolving polystyrene having a molecular weight of at least 20,000 in a solvent and
      2. reacting the dissolved polystyrene with a stoichiometric excess of bromine chloride over that required for achieving the desired degree of bromination in the presence of up to about 15% by weight of the polystyrene of a Lewis acid catalyst at about 20°C to about 50°C.

      The dominant substitution pattern in the trihalogenated product is at the 2,4,5 positions, with significantly lesser amounts of other isomers including 2,3,5. There does not appear to be any 2,4,6 substitution. A very small percentage of chlorine is believed to be nuclear bound.
    • 本方法是用于生产溴化苯乙烯低聚物和聚苯乙烯的方法,优选基本上是三溴化聚苯乙烯。 该方法的一个优选实施方案可以概括为由以下组成:... 1.在溶剂中溶解分子量至少为20,000的聚苯乙烯和... 2.将溶解的聚苯乙烯与化学计量过量的溴化氯反应超过 在约20℃至约50℃下在约15重量%的路易斯酸催化剂的聚苯乙烯存在下达到所需程度的溴化所需的量。 三卤代产物在2,4,5位,显着较少量的其它异构体包括2,3,5。 似乎没有任何2,4,6替代。 相当少的氯被认为是核结合的。
    • 57. 发明公开
    • PROCESS FOR THE PREPARATION OF DIENE POLYMERS OR RANDOM VINYL ARENE-DIENE COPOLYMERS
    • 制备二烯聚合物或随机乙烯丙烯 - 二烯共聚物的方法
    • EP3183280A1
    • 2017-06-28
    • EP15759677.6
    • 2015-08-19
    • Versalis S.p.A.
    • SODDU, LucaVALLIERI, AndreaSOLITO, Antonio
    • C08F293/00
    • C08F36/06C08F112/08C08F212/08C08F236/06C08F236/10C08F2438/02C08F2/38
    • Process for the preparation of a diene polymer or a random vinyl arene-diene copolymer comprising anionically (co)polymerising at least one conjugated diene monomer, optionally in the presence of at least one vinyl arene, in the presence of at least one hydrocarbon solvent, at least one lithium-based initiator and at least one organic compound containing at least one nitroxide group having general formula (I) or (II): wherein: R1, R2, R3 and R4, mutually identical or different, represent a hydrogen atom; or are selected from C1-C20, preferably C1-C8, linear or branched alkyl groups optionally containing heteroatoms such as, for example, oxygen, nitrogen,sulphur,optionally substituted cycloalkyl groups, optionally substituted C1-C20, preferably C1-C8 , linear or branched alkoxy groups, optionally substituted aryl groups; -x is an integer ranging from 0 to 7, preferably ranging from 4 to 5; -y is an integer ranging from 1 to 3, preferably ranging from 1 to 2.
    • 用于制备二烯聚合物或无规乙烯基芳烃 - 二烯共聚物的方法,所述共聚物包含在至少一种烃溶剂存在下任选地在至少一种乙烯基芳烃存在下阴离子(共)聚合至少一种共轭二烯单体, 至少一种锂基引发剂和至少一种含有至少一个具有通式(I)或(II)的氮氧自由基的有机化合物:其中:R1,R2,R3和R4相同或不同,表示氢原子; 或选自C 1 -C 20,优选C 1 -C 8,任选含有杂原子的线性或支化烷基,例如氧,氮,硫,任选取代的环烷基,任选取代的C 1 -C 20,优选C 1 -C 8,线性 或支化烷氧基,任选取代的芳基; -x是范围从0到7的整数,优选范围从4到5; -y是1至3的整数,优选1至2的整数。