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    • 3. 发明授权
    • Process for production of vinyl chloride polymer
    • 生产氯乙烯聚合物的方法
    • US4757124A
    • 1988-07-12
    • US76996
    • 1987-07-21
    • Shunichi KoyanagiHajime KitamuraToshihide ShimizuIchiro Kaneko
    • Shunichi KoyanagiHajime KitamuraToshihide ShimizuIchiro Kaneko
    • C08F14/06C08F2/00C08F2/18C08F4/06C08F2/22C08F2/44
    • C08F2/004
    • This process is a process for production of a vinyl chloride polymer by suspension polymerization or emulsion polymerization of vinyl chloride monomer or a mixture of vinyl chloride monomer with a vinyl monomer copolymerizable with said vinyl chloride monomer in an aqueous medium, characterized in that the polymerization is carried out in a polymerizer, the inner wall surface and portions of the auxiliary equipment thereof which may come into contact with the monomer during polymerization being previously coated with a scaling preventive comprising at least one selected from dyes, pigments and aromatic or heterocyclic compounds having at least 5 conjugated .pi. bonds, while controlling the chloride ion concentration in the reaction mixture to not higher than 100 ppm. According to said process, scaling onto the inner wall surface of a polymerizer, etc. during polymerization can be prevented effectively and surely.
    • 该方法是通过氯乙烯单体或氯乙烯单体与可与所述氯乙烯单体在水性介质中共聚的乙烯基单体的混合物的悬浮聚合或乳液聚合制备氯乙烯聚合物的方法,其特征在于聚合是 在聚合反应器中进行的内壁表面及其辅助设备的部分可在聚合期间与单体接触,预先涂覆防垢剂,其包含选自染料,颜料和芳族或杂环化合物中的至少一种,其具有 最少5个共轭π键,同时将反应混合物中的氯离子浓度控制在不高于100ppm。 根据所述方法,能够有效且可靠地防止在聚合反应期间缩聚到聚合反应器内壁表面等。
    • 5. 发明授权
    • Method for the preparation of vinyl chloride polymers
    • 氯乙烯聚合物的制备方法
    • US4232141A
    • 1980-11-04
    • US925704
    • 1978-07-18
    • Shunichi KoyanagiHajime KitamuraKazuhiko Kurimoto
    • Shunichi KoyanagiHajime KitamuraKazuhiko Kurimoto
    • C08F14/00C08F2/00C08F2/16C08F2/18C08F2/20C08F2/22C08F4/00C08F14/06
    • C08F14/06Y10S526/908
    • An improved method for the polymerization of vinyl chloride or a monomer mixture mainly composed of vinyl chloride in an aqueous polymerization medium is proposed in which a water-insoluble polymerization initiator, being solid at room temperature as dispersed in the aqueous medium and having a particle size distribution of 50 .mu.m or finer, is added to the polymerization mixture which is maintained at a temperature where the half-life period of the initiator is 120 minutes or longer or, alternatively, over a duration equal to or shorter than one-tenth of the half-life period of the initiator at the temperature of the polymerization mixture. By this method the polymerization can be homogeneously proceeded to produce vinyl chloride polymers having a uniform particle size distribution, excellent heat stability and much less fish-eyes when fabricated into sheets.
    • 提出了一种在水性聚合介质中聚合氯乙烯或主要由氯乙烯组成的单体混合物的改进方法,其中水不溶性聚合引发剂在室温下分散在水性介质中为固体,具有粒径 将分布为50μm或更细的聚合混合物加入到保持在引发剂的半衰期为120分钟或更长的温度下的聚合混合物中,或者在等于或短于引发剂的十分之一的时间内, 引发剂在聚合混合物温度下的半衰期。 通过该方法,可以均匀地进行聚合以制备具有均匀粒度分布,优异的热稳定性和制造成片材的鱼眼少得多的氯乙烯聚合物。
    • 6. 发明授权
    • Method for preventing polymer scale deposition in the polymerization of
an ethylenically unsaturated monomer in an aqueous medium
    • 防止水性介质中烯属不饱和单体聚合中的聚合物垢沉积的方法
    • US4272622A
    • 1981-06-09
    • US149414
    • 1980-05-13
    • Hajime KitamuraToshihide ShimizuIchiro Kaneko
    • Hajime KitamuraToshihide ShimizuIchiro Kaneko
    • C08F2/00C08F2/18C08F2/44C08F2/20C08F2/22C08F2/24
    • C08F2/004
    • The invention provides a novel method for preventing polymer scale deposition on the reactor walls in the polymerization of vinyl chloride, vinylidene chloride, styrene and other ethylenically unsaturated monomers in an aqueous medium. The inventive method comprises coating the reactor walls, piror to polymerization, with an aqueous coating solution containing a water-soluble ionic polymer and a water-soluble ionic dye having counteractive polarity to the polarity of the water-soluble ionic polymer compound. In other words, a water-soluble anionic dye is used as combined with a water-soluble cationic polymer and a water-soluble cationic dye is used as combined with a water-soluble anionic polymer compound. The scale preventing effect obtained with the combined use of the above two components can be further increased when the aqueous coating solution is admixed with a monovalent alcohol having from 3 to 6 carbon atoms in a molecule owing to the improved spreading of the aqueous solution on the metal surface of the reactor walls. The effect of the method is so remarkable and reliable that polymerization of styrene and other monomers can be performed in a stainless steel polymerization reactor, said polymerization being hitherto conducted in a glass-lined reactor due to the lack of an efficient method for preventing polymer scale deposition on the stainless steel surfaces.
    • 本发明提供了一种用于在水性介质中聚合氯乙烯,偏二氯乙烯,苯乙烯和其它烯键式不饱和单体的聚合物垢沉积在反应器壁上的新方法。 本发明的方法包括用含有水溶性离子聚合物的水性涂料溶液和反应器壁,吡喃聚合反应,并且与水溶性离子聚合物化合物的极性具有相反极性的水溶性离子染料。 换句话说,使用水溶性阴离子染料与水溶性阳离子聚合物组合,并且使用水溶性阳离子染料与水溶性阴离子聚合物化合物组合。 当水性涂料溶液与分子中具有3至6个碳原子的一价醇混合时,可以进一步提高通过组合使用上述两种组分获得的防垢效果,这是由于水溶液在 反应器壁的金属表面。 该方法的效果是非常显着和可靠的,苯乙烯和其它单体的聚合可以在不锈钢聚合反应器中进行,所述聚合迄今为止在玻璃衬里的反应器中进行,因为缺乏有效的防止聚​​合物垢的方法 沉积在不锈钢表面上。