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21. 发明公开

EP0623632A3 Processes for preparing vinyl chloride polymers 失效
标题翻译：一种用于氯乙烯聚合物的制备方法。
公开(公告)号：EP0623632A3
公开(公告)日：1995-05-03
申请号：EP94303257.3
申请日：1994-05-05
申请人： Shin-Etsu Chemical Co., Ltd.
发明人： Amano, Tadashi , Hiyama, Tadayoshi, 3-208, Shin-Etsu Chemical
IPC分类号： C08F14/06 , C08F2/20
CPC分类号： C08F14/06 , C08F2/20
摘要： Vinyl chloride polymer is prepared by suspension polymerization of monomeric vinyl chloride or a mixture of vinyl chloride and another monomer in an aqueous medium while agitating the suspension. A first partially saponified polyvinyl alcohol having a degree of saponification of 60 - 80 mol% and an average degree of polymerization of 500-1,000 is added as a suspension stabilizer at the start of polymerization, and a second partially saponified polyvinyl alcohol having a degree of saponification of 75 - 85 mol% and an average degree of polymerization of 1,500-2,700 is added while the conversion is 30% to 60%. The agitating power is controlled to 80 - 120 kg·m/s·ton from the start of polymerization to a conversion of 20 to 50%, and to 130-200 kg·m/s·ton from then to the completion of polymerization. The resulting vinyl chloride polymer is of quality as demonstrated by a high bulk density and improved free flow, monomer removal, gelation, and plasticizer absorption as well as minimal fish eye. Scale build-up on the reactor wall is minimized.

22. 发明公开

EP0633273A1 Process for producing vinyl chloride polymers 失效
标题翻译： Verfahren zur Herstellung von聚氯乙烯
公开(公告)号：EP0633273A1
公开(公告)日：1995-01-11
申请号：EP94304871.0
申请日：1994-07-04
申请人： SHIN-ETSU CHEMICAL CO., LTD.
发明人： Ueda, Takuya , Amano, Tadashi , Fujiwara, Makoto
IPC分类号： C08F14/06 , C08F2/20
CPC分类号： C08F14/06 , C08F2/18
摘要： A process for producing a vinyl chloride polymer comprising the steps of charging a vinyl chloride monomer or a vinylic monomer mixture containing a vinyl chloride monomer, an oil-soluble polymerization initiator, a dispersion stabilizer and water into a polymerization vessel, and suspension-polymerizing said monomer in an aqueous medium, wherein said water is charged into the polymerization vessel in a state of pH 2.5-5.0. According to this production process, a vinyl chloride polymer having good particle size distribution, initial coloration, heat stability, demonomering property (removal of monomer) and the like is obtained in a broad range of an oxygen amount without being affected by the oxygen amount in the polymerization vessel. Further, the polymer obtained by the production process presents a formed article having fewer fish eyes when it is formed. In addition, because an adhesion amount of polymer scales to an inner wall of the polymerization vessel is extremely less, productivity is good.
摘要翻译：一种制备氯乙烯聚合物的方法，包括以下步骤：将含有氯乙烯单体，油溶性聚合引发剂，分散稳定剂和水的氯乙烯单体或乙烯基单体混合物加入聚合容器中，并将所述单体在水性介质中，其中所述水以pH 2.5-5.0的状态装入聚合容器中。根据该制造方法，可以在宽范围的氧量中获得具有良好的粒度分布，初始着色，热稳定性，脱色性（单体除去）等的氯乙烯聚合物，而不受氧量的影响聚合容器。此外，通过制造方法获得的聚合物形成具有较少鱼眼的成形制品。此外，由于聚合物的聚合物的内壁的附着量非常小，所以生产率良好。

23. 发明公开

EP0622117A1 Polymerization apparatus 失效
标题翻译：聚合设备
公开(公告)号：EP0622117A1
公开(公告)日：1994-11-02
申请号：EP94106509.6
申请日：1994-04-26
申请人： Shin-Etsu Chemical Co., Ltd.
发明人： Ohnishi, Shuji , Tanifuji, Yoichi , Amano, Tadashi
IPC分类号： B01J19/18 , B01J19/24 , B01J19/00 , C08F2/18 , C08F14/06
CPC分类号： B01J19/2465 , B01D29/03 , B01D2201/184 , B01J8/006 , B01J19/002 , B01J2219/00094 , B01J2219/00103 , B01J2219/00114 , B01J2219/00252 , C08F14/06 , C08F2/18
摘要： There is described a polymerization apparatus for the polymerization of a polymerizable monomer, which is equipped with a circulation path for the flow of a reaction mixture that comprises a polymerization vessel (1), a heat exchanger (2) arranged outside said polymerization vessel (1), and a pipeline (3) that is extended from said polymerization vessel (1), is returned to said polymerization vessel (1) through said heat exchanger (2), and is provided with a strainer (5) in the course thereof. Said apparatus is characterized by the surface of a filter being provided in said strainer (5) and having located upstream rodlike projections, and a method of polymerizing a monomer to a polymer by using said apparatus. With this apparatus scale and polymers in the form of blocks can be prevented from being mixed into the reaction mixture. Therefore, if the polymerization is repeated, clogging of the tubes of the heat exchanger and dropping of the flow velocity of the reaction mixture as well as fish eyes on sheets made from said polymer can be prevented.
摘要翻译：描述了一种用于聚合可聚合单体的聚合设备，该聚合设备配备有用于反应混合物流动的循环路径，该循环路径包括聚合反应器（1），布置在所述聚合反应器（1）外部的热交换器（2））和从所述聚合反应器（1）延伸的管线（3）通过所述热交换器（2）返回到所述聚合反应器（1），并且在其过程中设置有过滤器（5）。所述设备的特征在于在所述过滤器（5）中提供过滤器的表面并且具有位于上游棒状突起的位置，以及通过使用所述设备将单体聚合成聚合物的方法。通过这种装置，可防止块状聚合物混入反应混合物中。因此，如果重复聚合，则可以防止热交换器的管堵塞和反应混合物的流速下降以及鱼眼在由所述聚合物制成的片材上。

24. 发明授权

EP0433754B1 Method for the suspension polymerization of vinyl chloride monomer 失效
标题翻译：一种用于氯乙烯单体的悬浮聚合方法。
公开(公告)号：EP0433754B1
公开(公告)日：1994-06-08
申请号：EP90123191.0
申请日：1990-12-04
申请人： Shin-Etsu Chemical Co., Ltd.
发明人： Amano, Tadashi , Hoshida, Shigehiro, c/o Shintech Inc.
IPC分类号： C08F2/20 , C08F14/06
CPC分类号： C08F14/06 , C08F2/20

25. 发明授权

EP0442737B1 Method for the preparation of a polyvinyl chloride resin 失效
标题翻译：一种制造聚氯乙烯树脂的方法。
公开(公告)号：EP0442737B1
公开(公告)日：1994-04-20
申请号：EP91301203.5
申请日：1991-02-14
申请人： Shin-Etsu Chemical Co., Ltd.
发明人： Noguki, Genji , Koga, Toshimichi , Amano, Tadashi
IPC分类号： C08F14/06 , C08F2/18 , C08F2/44
CPC分类号： C08F14/06 , C08K5/103 , C08F2/18 , C08L27/06

26. 发明公开

EP0473490A1 Improvement in the suspension polymerization of vinyl chloride 失效
标题翻译： Verbesserung in der Suspensionpolymerization von Vinylchlorid。
公开(公告)号：EP0473490A1
公开(公告)日：1992-03-04
申请号：EP91402226.4
申请日：1991-08-09
申请人： SHIN-ETSU CHEMICAL CO., LTD.
发明人： Amano, Tadashi , Shirota, Yoshihiro , Hoshida, Shigehiro
IPC分类号： C08F14/06 , C08F2/20
CPC分类号： C08F2/002 , C08F14/06 , C08F2/18
摘要： An improvement is proposed in the process of suspension polymerizatiopn of vinyl chloride monomer in an aqueous polymerization medium, by which a resin product of high quality relative to the contents of foamy resin and fish-eyes can be produced in a high efficiency with little deposition of polymer scale on the reactor walls. The improvment comprises heating and keeping the surfaces of the polymerization reactor and accessory equipment coming into contact with the gaseous phase above the polymerization mixture at a temperature of 55 °C or higher during a period starting from a moment when the temperature of the polymerization mixture under temperature elevation up to the polymerization temperature is still 45 °C or lower to a moment when conversion of the monomer into polymer is at least 10% so that foaming on the polymerization mixture can be greatly reduced.
摘要翻译：在水性聚合介质中氯乙烯单体的悬浮聚合反应过程中提出了一种改进，通过该方法可以高效率地生产出高质量的相对于泡沫树脂和鱼眼的含量的树脂产物，几乎没有聚合物垢在反应器壁上。该改进包括在聚合反应器和附属设备的表面在聚合混合物上方的气相与55℃或更高的温度下接触的温度在从聚合混合物下的温度当单体转化为聚合物时，到达聚合温度的温度升高仍然为45℃或更低，从而可以大大降低聚合混合物的发泡。

27. 发明公开

EP0442737A3 Method for the preparation of a polyvinyl chloride resin 失效
标题翻译：聚氯乙烯树脂的制备方法
公开(公告)号：EP0442737A3
公开(公告)日：1991-12-04
申请号：EP91301203.5
申请日：1991-02-14
申请人： Shin-Etsu Chemical Co., Ltd.
发明人： Noguki, Genji , Koga, Toshimichi , Amano, Tadashi
IPC分类号： C08F14/06 , C08F2/18 , C08F2/44
CPC分类号： C08F14/06 , C08K5/103 , C08F2/18 , C08L27/06
摘要： An improvement is proposed for decreasing triboelectric static charging of a polyvinyl chloride resin powder so as to improve the flowability of the powder and prevent a decrease in the bulk density of the powder due to static electricity. The improvement comprises adding to the aqueous polymerization mixture during the polymerization process a specified amount of an aqueous dispersion containing a salt of a long-chain carboxylic acid with a divalent metal and an ester of sorbitan with a long-chain carboxylic acid in a specified weight proportion and in a specified total concentration, at a point when conversion of the monomer to polymer is at least 70%.

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