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公开(公告)号：US4098972A
公开(公告)日：1978-07-04
申请号：US667303
申请日：1976-03-16
CPC分类号： C08F2/004 , B01J19/0066 , B01J19/02 , B05D5/08 , B05D7/227 , B01J2219/0236
摘要： Vinyl chloride monomers or a monomeric mixture composed mainly of vinyl chloride is bulk-polymerized in a polymerization vessel. The inner walls and other surfaces of said vessel, coming into contact with the monomer or monomers, are coated with one or more specifically selected inorganic or organic compounds having a solubility greater than 0.5 g in 100 g of water at 25.degree. C and a boiling point higher than 60.degree. C. This bulk polymerization method serves to greatly reduce the deposition of polymer scale on the vessel walls and other surfaces. In addition the polymer scale deposited can be readily separated and removed by merely washing with water or gas under pressure. The present method provides high quality polymers.
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公开(公告)号：US4189552A
公开(公告)日：1980-02-19
申请号：US893581
申请日：1978-04-05
申请人： Satoshi Kuwata , Kinya Ogawa , Kazuhiko Kurimoto
发明人： Satoshi Kuwata , Kinya Ogawa , Kazuhiko Kurimoto
IPC分类号： C08F14/06
CPC分类号： C08F14/06
摘要： Vinyl chloride polymers or copolymers having a relatively low molecular weight or degree of polymerization are prepared by a method in which an organic compound containing a mercapto group and a hydroxy or carboxyl group in a molecule is used as the chain transfer agent. Due to their very high activity, these chain transfer agents are used in amounts that are smaller than conventionally required quantities. The quality of the polymer products is satisfactory with respect to heat stability, occurrence of fish-eyes, particle size distribution, plasticizer absorption and ease of removing residual monomer.
摘要翻译： 通过使用分子中含有巯基和羟基或羧基的有机化合物作为链转移剂的方法制备具有相对低分子量或聚合度的氯乙烯聚合物或共聚物。 由于它们非常高的活性，这些链转移剂的用量小于常规要求的量。 聚合物产品的质量在热稳定性，鱼眼发生，粒度分布，增塑剂吸收和容易除去残留单体方面是令人满意的。
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公开(公告)号：US4016341A
公开(公告)日：1977-04-05
申请号：US625044
申请日：1975-10-23
CPC分类号： C08F2/004
摘要： Vinyl chloride monomer, or a mixture thereof with a copolymerizable monomer or monomers, is bulkpolymerized so that the deposition of polymer scale on the inner walls of the polymerization vessel and other surfaces in contact with the monomer or monomers can be greatly reduced by coating them with phosphoric esters, polyphosphoric esters or their alkali metal salts before the polymerization is commenced. Clean-up operations following each polymerization run are much simplified.
摘要翻译： 氯乙烯单体或其与可共聚单体或单体的混合物被体积聚合，使得通过用聚合容器的内壁和与单体或单体接触的其它表面沉积聚合物垢可以大大降低， 磷酸酯，多磷酸酯或其碱金属盐开始聚合。 每次聚合运行后的清理操作大大简化。
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4.发明授权Method for removing unreacted monomers from aqueous dispersions of polymerizate 失效从聚合物的水性分散体中除去未反应的单体的方法
公开(公告)号：US4092471A
公开(公告)日：1978-05-30
申请号：US620819
申请日：1975-10-08
申请人： Shigeru Arai , Kenichi Ito , Kinya Ogawa , Kazuhiko Kurimoto , Yoshihiro Shirota
发明人： Shigeru Arai , Kenichi Ito , Kinya Ogawa , Kazuhiko Kurimoto , Yoshihiro Shirota
CPC分类号： C08F6/16
摘要： Unreacted monomer or monomers and any other volatile organic compounds contained in an aqueous dispersion of polymerizate are removed or separated by a method comprising circulating the aqueous polymerizate dispersion from the bottom of its container to the upper part of the container located over the surface of the dispersion via an exterior conduit. The pressure in the container is maintained at a level reduced to about the saturated vapor pressure of water at the temperature of the dispersion. This manner of separation of monomer from polymer serves to improve the working environment as well as the resulting polymer quality, and the monomer or monomers thus recoverd can be advantageously recycled.
摘要翻译： 未反应的单体或单体以及聚合物水性分散体中所含的任何其它挥发性有机化合物被除去或分离，包括使聚合物水分散体从其容器的底部循环到位于分散体表面上的容器的上部 通过外部导管。 在分散体的温度下，容器中的压力保持在水平下降至约饱和的蒸气压。 从聚合物分离单体的这种方式用于改善工作环境以及所得的聚合物质量，并且可以有利地回收这样回收的单体或单体。
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公开(公告)号：US4272424A
公开(公告)日：1981-06-09
申请号：US84380
申请日：1979-10-12
申请人： Hajime Kitamura , Kazuhiko Kurimoto , Koji Azuma
发明人： Hajime Kitamura , Kazuhiko Kurimoto , Koji Azuma
IPC分类号： C08F14/00 , C08F2/00 , C08F2/18 , C08F2/44 , C08F14/06 , C08F291/00 , C08F291/02 , C08F292/00 , C08L33/10 , C08K3/00 , C08L9/08 , C08L27/06
CPC分类号： C08F291/02 , C08F14/06 , C08F291/00 , C08F292/00
摘要： A novel process is proposed for the preparation of vinyl chloride based resins modified with a polymer latex, according to which the latex polymer is absorbed so completely and uniformly on the polyvinyl chloride resin that the effect of the modification of the resin properties is remarkably enhanced along with no adverse effects on the particle size distribution of the resin product and no effluence of the latex into the waste water discharged in the dehydration of the aqueous polymerizate slurry after completion of the polymerization. The process of the invention comprises introducing the modifier polymer latex into the polymerization mixture only when the monomer conversion is in the range from 30 to 95% and introducing an inorganic fine powder such as fume silica, bentonite and diatomaceous earth into the polymerization mixture at the same time as or before the introduction of the modifier polymer latex.
摘要翻译： 提出了一种制备用聚合物胶乳改性的氯乙烯基树脂的新方法，根据该方法，胶乳聚合物被完全均匀地吸收在聚氯乙烯树脂上，树脂性能的改性效果显着提高 对树脂制品的粒度分布没有不利影响，并且在聚合完成后，在聚合水性聚合物浆料的脱水中排出的废水中没有胶乳流出。 本发明的方法包括仅在单体转化率为30-95％的范围内将改性聚合物胶乳引入聚合混合物中，并将无机细粉如烟气二氧化硅，膨润土和硅藻土引入聚合混合物中 在引入改性聚合物胶乳之前或之前的同一时间。
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公开(公告)号：US4136242A
公开(公告)日：1979-01-23
申请号：US788256
申请日：1977-04-18
IPC分类号： C08F14/06 , C08F2/20 , C08F114/06
CPC分类号： C08F14/06
摘要： A polymerization vessel equipped with a condenser is charged with vinyl chloride, a suspending agent or dispersing agent, and water. The mixture is subjected to a preparatory stirring in the absence of a catalyst. The polymerization catalyst is added thereto when bubbling caused by the preparatory stirring subsides and stable suspended oil drops form. Blockage of the condenser by polymer scale deposition is substantially reduced. The addition of an alkaline substance, an oxidizing substance or an azine dye further reduces polymer scale deposition. Preferably the operation of the condenser is initiated only after the conversion rate is higher than 5% or the average value per unit hour.
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公开(公告)号：US4232141A
公开(公告)日：1980-11-04
申请号：US925704
申请日：1978-07-18
CPC分类号： C08F14/06 , Y10S526/908
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US4029619A
公开(公告)日：1977-06-14
申请号：US312306
申请日：1972-12-05
CPC分类号： C08F14/06 , Y10S526/911
摘要： Vinyl chloride monomer is polymerized in aqueous medium under the influence of oil soluble polymerization initiators in the presence of alkali metal salts of higher fatty acid, higher alcohols and/or higher fatty acids, and hydroxides of alkali metals in certain amounts respectively, to produce vinyl chloride resin, stable for making resin/plasticizer pastes, mostly composed of particles having diameters lying between 0.1 and 2 microns. The resins are suitable for making resin/plasticizer pastes that have a low initial viscosity, little change in viscosities during storage, good thermal stability and excellent degassing property. Reduced deposition of polymer scales on the walls of the polymerization vessels was successful.
摘要翻译： 氯乙烯单体在水溶性介质中在油溶性聚合引发剂的影响下，在高级脂肪酸，高级醇和/或高级脂肪酸的碱金属盐和碱金属的氢氧化物存在下分别聚合，生成乙烯基 氯化物树脂，对于制备树脂/增塑剂浆料是稳定的，主要由直径在0.1和2微米之间的颗粒组成。 这些树脂适用于制造具有低初始粘度，储存期间粘度变化小，热稳定性好，脱气性好的树脂/增塑剂糊剂。 在聚合容器的壁上减少聚合物垢的沉积是成功的。
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