Halogen-containing s-triazines
    21.
    发明授权
    Halogen-containing s-triazines 失效
    含卤素的s-三嗪

    公开(公告)号:US4386203A

    公开(公告)日:1983-05-31

    申请号:US305857

    申请日:1981-09-25

    CPC分类号: C08K5/3492 C07D251/34

    摘要: Halogen-containing s-triazine compounds of the formula I ##STR1## where R is OH, R.sup.1, R.sup.2 or R.sup.3, R.sup.1 is ##STR2## where R.sup.4 is lower alkyl or lower haloalkyl, X is bromine or chlorine, k and n are 0 or integers from 1 to 5 and k+n is not more than 5, R.sup.2 is ##STR3## where R.sup.5 is lower alkyl or lower haloalkyl, Z is bromine or chlorine, s and p are 0 or integers from 1 to 4 and s+p is not more than 4, and R.sup.3 is ##STR4## where R, R.sup.5, Z, s and p have the above meanings. The compounds claimed are prepared by reacting cyanuric chloride with a phenol of the formula III ##STR5## and a benzene derivative of the formula IV ##STR6## in the presence of a base. The products thereby obtained are used for flameproofing thermoplastics, in particular styrene/acrylonitrile copolymers made impact-resistant with rubber (ABS resins).

    摘要翻译: 其中R是OH,R 1,R 2或R 3的R 1是其中R 4是低级烷基或低级卤代烷基,X是溴或氯的卤素含量的三嗪化合物,其中R是OH,R1,R2或R3,k和n是 0或1〜5的整数,k + n为5以下,R2为R5,其中R5为低级烷基或低级卤代烷基,Z为溴或氯,s为p,p为0或1〜4的整数,s为 + p不大于4,R3为,其中R,R5,Z,s和p具有上述含义。 所要求的化合物通过在碱存在下使氰尿酰氯与式III的苯酚和式IV的苯衍生物反应来制备。 由此获得的产品用于隔热热塑性塑料,特别是用橡胶(ABS树脂)制成抗冲击性的苯乙烯/丙烯腈共聚物。

    Preparation of block copolymers by ionic polymerization
    26.
    发明授权
    Preparation of block copolymers by ionic polymerization 失效
    通过离子聚合制备嵌段共聚物

    公开(公告)号:US5587423A

    公开(公告)日:1996-12-24

    申请号:US135406

    申请日:1993-10-13

    IPC分类号: C08F297/04

    CPC分类号: C08F297/04

    摘要: In a process for preparing block copolymers of styrene or its equivalents on the one hand and of butadiene or its equivalents on the other hand by sequential anionic polymerization, in which a first monomer and the organometallic compound serving as initiator are first of all combined to form a reaction mixture and the reaction is continued until at least part of the first monomer has been consumed, and then at least one further monomer is added and is in each case partially or completely reacted, the polymerization is carried out continuously in a conventional manner in a tubular reactor, the reaction of in each case one monomer being carried out in each case in one reactor section and at least two reactor sections being separated by a mixing stretch.

    摘要翻译: 在一方面通过连续阴离子聚合制备苯乙烯或其等同物的丁二烯或其等同物的嵌段共聚物的方法,其中第一单体和用作引发剂的有机金属化合物首先组合形成 反应混合物并继续反应直到至少部分第一单体已被消耗,然后加入至少一种其它单体,并且在每种情况下部分或完全反应,聚合以常规方式在 管状反应器,在每种情况下的反应中,一种单体在每种情况下在一个反应​​器部分中进行,并且至少两个反应器部分通过混合拉伸分离。

    Preparation of an aromatic vinyl compound
    27.
    发明授权
    Preparation of an aromatic vinyl compound 失效
    芳族乙烯基化合物的制备

    公开(公告)号:US5391655A

    公开(公告)日:1995-02-21

    申请号:US136931

    申请日:1993-10-19

    摘要: A process is described for preparing styrene polymers by continuous anionic polymerization, the monomer or monomers and the organometallic compound serving as starter (initiator) being added in solution to a tubular reactor operating essentially without backmixing and being left in the reactor until the monomer has been consumed, wherein the polymerization is carried out in at least two successive tubular reactor sections operating in each case essentially adiabatically, with in each case at least one heat exchanger arranged between the sections. If desired a proportion of the starter and/or of the monomer is added to at least one reactor connected downstream of the first reactor.

    摘要翻译: 描述了通过连续阴离子聚合制备苯乙烯聚合物的方法,将单体或单体和用作起始物的有机金属化合物(引发剂)加入到基本上不进行回混的管式反应器中,并保留在反应器中,直到单体已经 消耗,其中聚合在至少两个连续的管式反应器段中进行,每个反应器段在每种情况下基本上绝热地进行,在每种情况下,至少一个热交换器布置在两部分之间。 如果需要,将起始物和/或单体的一部分加入到连接在第一反应器下游的至少一个反应器中。

    Metering apparatus for introducing free-flowing, powdered substances in
a controllable manner into spaces under pressure
    28.
    发明授权
    Metering apparatus for introducing free-flowing, powdered substances in a controllable manner into spaces under pressure 失效
    用于以可控方式将自由流动的粉末物质引入压力空间的计量装置

    公开(公告)号:US4764056A

    公开(公告)日:1988-08-16

    申请号:US943486

    申请日:1986-12-19

    IPC分类号: B01J3/02 B01J8/00 B65G53/46

    CPC分类号: B01J8/0035 B01J3/02

    摘要: A metering apparatus for introducing free-flowing, powdered substances in a controlled manner into spaces under pressure consists of a storing unit,a proportioning unit consisting of a shaft which is sealed in a housing with the aid of sealing rings and glands, can be rotated alternately through 180.degree. in each case and is provided with two depressions opposite one another, for accepting and discharging the substance respectively,an end unit consisting of a cylindrical cavity, which is sealed with the aid of sealing rings and glands and has a nozzle-like shape toward the space under pressure, and a spindle which is arranged concentrically with respect to the cavity, is capable of making to and fro stroke-like movements and, at its tip, has a slope corresponding to that of the nozzle-like feed, the end unit being arranged flush with the wall of the space,a connecting line between the storing unit and the accepting depression within the proportioning unit, a connecting line between the discharging depression within the proportioning unit and the cavity of the end unit, andtwo connections for inert gas.

    摘要翻译: 用于将受控制的自由流动粉末物质以压力空间引入的计量装置包括存储单元,由轴组成的配比单元,该轴由密封环和压盖密封在壳体中,可以旋转 在每种情况下交替地通过180度并且设置有彼此相对的两个凹部,用于分别接收和排出物质,一个由圆柱形空腔组成的端部单元,其通过密封环和压盖密封,并且具有喷嘴 - 并且相对于空腔同心地布置的心轴能够进行和行程的运动,并且在其尖端处具有对应于喷嘴状进料的斜率 ,所述端部单元与所述空间的壁齐平,所述存储单元和所述配料单元内的所述接收凹部之间的连接线,所述连接线 e排放配比单元内的凹陷和端部单元的腔,以及两个用于惰性气体的连接。