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    • 1. 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。
    • 8. 发明授权
    • Unsaturated polyesters
    • 不饱和聚酯
    • US5407772A
    • 1995-04-18
    • US159176
    • 1993-11-30
    • Robert D. BayleyCarol A. FoxThomas R. HoffendHadi K. MahabadiEnno E. AgurGuerino SacripanteMichael S. Hawkins
    • Robert D. BayleyCarol A. FoxThomas R. HoffendHadi K. MahabadiEnno E. AgurGuerino SacripanteMichael S. Hawkins
    • C08G63/547G03G9/087G03G9/00
    • C08G63/547G03G9/08755G03G9/08791G03G9/08793G03G9/08797
    • Unsaturated linear polymers have repeating units of a reaction product of a first monomer, a second monomer, a third monomer and optionally a fourth monomer. The linear polymers have a glass transition temperature ranging from about 52.degree. C. to about 61.degree. C. The first monomer should have a weight average molecular weight less than 200. The second monomer may be a dicarboxylic acid or diester which is different than the third monomer. A concentration of second residues of the polymer, derived from the second monomer, ranges from about 3 wt. % to about 15 wt. %, based on the total weight of the polymer. The third monomer is an aromatic dicarboxylic acid or an ester thereof. In the polymer, a concentration of third residues, derived from the third monomer, ranges from about 40 wt. % to about 55 wt. %, based on the total weight of the polymer. The fourth monomer is a diol having a higher molecular weight than the first monomer. In a process for preparing the inventive polymer, the first, second, third monomer (and optionally a fourth monomer) and/or a catalyst undergo transesterification to form the unsaturated, linear polymer.
    • 不饱和线性聚合物具有第一单体,第二单体,第三单体和任选的第四单体的反应产物的重复单元。 线性聚合物的玻璃化转变温度为约52℃至约61℃。第一单体应具有小于200的重均分子量。第二单体可以是二羧酸或二酯,其不同于 第三单体。 衍生自第二单体的聚合物的第二残余物的浓度范围为约3wt。 %至约15wt。 %,基于聚合物的总重量。 第三单体是芳族二羧酸或其酯。 在聚合物中,衍生自第三单体的第三残基的浓度范围为约40wt。 %至约55wt。 %,基于聚合物的总重量。 第四单体是分子量高于第一单体的二醇。 在制备本发明聚合物的方法中,第一,第二,第三单体(和任选的第四单体)和/或催化剂进行酯交换以形成不饱和的线性聚合物。