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    • 5. 发明授权
    • Bead suspension polymerization process
    • 珠悬浮聚合工艺
    • US5274057A
    • 1993-12-28
    • US812082
    • 1991-12-23
    • Michael K. GeorgesRobert D. BayleyLupu Alexandru
    • Michael K. GeorgesRobert D. BayleyLupu Alexandru
    • C08F2/20C08F236/10
    • C08F2/20C08F236/10
    • An improved process for producing resin particles by a bead suspension polymerization reaction, and a polymer formed by the process wherein the process comprises: providing a liquid reaction medium suitable for conducting the polymerization; forming a suspension agent system in the reaction medium by an in situ interaction of at least two components in the reaction medium, for example, certain water soluble metal halides and polyvinylacetate derived polymers; adding at least one polymerizable monomer compound to the resulting reaction medium having the suspension agent system dispersed therein; and effecting polymerization of the monomer in the reaction medium to form low ash content beads of the polymer.A second embodiment comprises conducting a bead suspension polymerization process utilizing the suspension agent system formed in situ to limit the amount of fine particles of less than about 100 microns produced during the process comprising: providing a reaction medium suitable for conducting the polymerization in the reaction system; utilizing a suspension agent system which is appropriate for forming polymer beads having a desired size and for minimizing fine particle formation; adding at least one polymerizable monomer compound to the resulting reaction medium having the suspension agent system dispersed therein; effecting polymerization of the monomer in the reaction medium to form the beads of the polymer; and separating resin particles from the reaction followed by optional washing and drying.
    • 通过珠粒悬浮聚合反应制备树脂颗粒的改进方法和通过该方法形成的聚合物,其中所述方法包括:提供适于进行聚合的液体反应介质; 在反应介质中通过反应介质中至少两种组分的原位相互作用形成悬浮剂体系,例如某些水溶性金属卤化物和聚乙酸乙烯酯衍生的聚合物; 向其中分散有悬浮剂体系的所得反应介质中加入至少一种可聚合单体化合物; 并且在反应介质中进行单体的聚合以形成聚合物的低灰分珠粒。 第二实施方案包括使用原位形成的悬浮剂体系进行珠粒悬浮聚合方法,以限制在该方法期间产生的小于约100微米的细颗粒的量,其包括:提供适于在反应体系中进行聚合的反应介质 ; 利用适于形成具有所需尺寸的聚合物珠粒并用于最小化细颗粒形成的悬浮剂体系; 向其中分散有悬浮剂体系的所得反应介质中加入至少一种可聚合单体化合物; 在反应介质中进行单体的聚合以形成聚合物的珠粒; 并从反应中分离树脂颗粒,然后任选地洗涤和干燥。
    • 7. 发明授权
    • Polymerization processes
    • 聚合工艺
    • US06469094B1
    • 2002-10-22
    • US09561208
    • 2000-04-28
    • Barkev KeoshkerianPaula J. MacLeodPeter G. OdellMichael K. Georges
    • Barkev KeoshkerianPaula J. MacLeodPeter G. OdellMichael K. Georges
    • C08J307
    • C08F4/00C08F293/005
    • A process for latex preparation including: a first heating of a mixture of at least one free radical polymerizable monomer compound, a free radical initiator compound, and a stable free radical compound to form a latomer mixture with from about 1 to about 8 percent conversion of the monomer compound to an oligomeric compound of the formula I—R′—SFR, wherein R′ is an oligomer comprised of from about 1 to about 30 monomer units, I— is a covalently bonded free radical initiator fragment arising from the free radical initiator compound, and —SFR is a covalently bound stable free radical group; dispersing the resulting latomer mixture in water with high shear to form a miniemulsion; and a second heating of the miniemulsion, wherein there results a high stability polymer particle latex which contains a polymer with a high monomer to polymer conversion of from about 98 to about 100 weight percent and a narrow polydispersity of from about 1.1 to about 2.0.
    • 一种用于胶乳制备的方法,包括:首先加热至少一种可自由基聚合的单体化合物,自由基引发剂化合物和稳定的自由基化合物的混合物以形成卡波姆混合物,其中约1至约8%的转化率 单体化合物与式I-R'-SFR的低聚化合物反应,其中R'是由约1至约30个单体单元组成的低聚物,I-是自由基引发剂产生的共价键合的自由基引发剂片段 化合物,-SFR是共价结合的稳定自由基; 将所得的卡波姆混合物以高剪切力分散在水中以形成细乳液; 和小乳液的第二次加热,其中产生高稳定性聚合物颗粒胶乳,其包含具有约98至约100重量%的高单体与聚合物转化率和约1.1至约2.0的窄多分散性的聚合物。
    • 8. 发明授权
    • Polymerization processes
    • 聚合工艺
    • US06365675B1
    • 2002-04-02
    • US09592188
    • 2000-06-12
    • Paula J. MacLeodPeter G. OdellFrancisco E. TorresMichael K. Georges
    • Paula J. MacLeodPeter G. OdellFrancisco E. TorresMichael K. Georges
    • C08F400
    • C08F2/38C08F2/30
    • A process for the preparation of a thermoplastic resin, or thermoplastic resins comprising: forming, or providing a miniemulsion comprised of a mixture of an oligomeric compound of the formula R—SFR, wherein R is an oligomeric compound comprised of from about 1 to about 30 monomer units and optionally a covalently bonded free radical initiator compound, —SFR is a covalently bound stable free radical end group, and at least one free radical polymerizable monomer compound, and a surfactant; and heating the miniemulsion wherein there results a latex thermoplastic resin or a latex of thermoplastic resins with a high monomer to polymer conversion of about 85 to about 100 percent and a narrow polydispersity of from about 1.1 to about 2.0.
    • 一种制备热塑性树脂或热塑性树脂的方法,包括:形成或提供由式R-SFR的低聚化合物的混合物组成的细乳液,其中R为约1至约30的低聚化合物 单体单元和任选的共价键合的自由基引发剂化合物,-SFR是共价结合的稳定的自由基端基,以及至少一种可自由基聚合的单体化合物和表面活性剂; 加热微乳液,其中产生胶乳热塑性树脂或具有约85至约100%的高单体至聚合物转化率和约1.1至约2.0的窄多分散性的热塑性树脂胶乳。