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    Process for production of ethylene oxide copolymer
    1.
    发明申请
    Process for production of ethylene oxide copolymer 审中-公开
    生产环氧乙烷共聚物的方法

    公开(公告)号：US20050197485A1

    公开(公告)日：2005-09-08

    申请号：US11051168

    申请日：2005-02-05

    申请人： Koichiro Saeki ,  Kazuo Takei ,  Toshiaki Kuriyama ,  Masashi Yukitake ,  Taketo Toba ,  Makoto Mizushima ,  Michiyuki Kono ,  Manabu Kikuta ,  Masahito Nishiura

    发明人： Koichiro Saeki ,  Kazuo Takei ,  Toshiaki Kuriyama ,  Masashi Yukitake ,  Taketo Toba ,  Makoto Mizushima ,  Michiyuki Kono ,  Manabu Kikuta ,  Masahito Nishiura

    IPC分类号： C08G65/02 ,  C08G18/48 ,  C08G65/08 ,  C08G65/14 ,  C08G65/26 ,  C08G65/34

    CPC分类号： C08G65/2696 ,  C08G18/4837 ,  C08G65/08

    摘要： An object of the present invention is to provide a process which can produce, easily and with good productivity and reproducibility, an ethylene oxide copolymer provided with desired compositional ratios of monomers and a desired molecular weight and further with a desired melting point. As a means of achieving this object, a process according to the present invention for production of an ethylene oxide copolymer is a process comprising a step of polymerizing a monomer mixture including ethylene oxide as a main component, thereby producing the ethylene oxide copolymer, with the process being characterized in that the polymerization step includes at least one step each of the following steps: a step in which only the ethylene oxide is supplied to thus polymerize it; and a step in which the ethylene oxide and another monomer are supplied to thus polymerize them.

    摘要翻译： 本发明的一个目的是提供一种可以制备具有期望组成比的单体和所需分子量并进一步具有所需熔点的环氧乙烷共聚物，能够容易地且具有良好的生产率和再现性的方法。 作为实现该目的的手段，根据本发明的环氧乙烷共聚物的制造方法是包括使包含环氧乙烷作为主要成分的单体混合物聚合的步骤，从而制备环氧乙烷共聚物， 方法的特征在于聚合步骤包括以下步骤中的至少一个步骤：仅供给环氧乙烷以使其聚合的步骤; 并且提供环氧乙烷和其它单体从而聚合它们的步骤。

    Production process for vinylpyrrolidone polymer
    6.
    发明授权
    Production process for vinylpyrrolidone polymer 有权

    公开(公告)号：US06391994B1

    公开(公告)日：2002-05-21

    申请号：US09772971

    申请日：2001-01-31

    申请人： Daijo Tomihisa ,  Nobuyuki Harada ,  Akio Naka ,  Toshiaki Kuriyama ,  Yuuji Shimasaki ,  Hideyuki Nishibayashi

    发明人： Daijo Tomihisa ,  Nobuyuki Harada ,  Akio Naka ,  Toshiaki Kuriyama ,  Yuuji Shimasaki ,  Hideyuki Nishibayashi

    IPC分类号： C08F2608

    摘要： The present invention provides a production process for a vinylpyrrolidone polymer which process prevents the polymerization reaction of N-vinylpyrrolidone from being hindered by by-products (as formed by nucleomethylation of N-vinylpyrrolidone) or &ggr;-butyrolactone, and therefore enables to obtain a vinylpyrrolidone polymer that has a desired molecular weight and involves only a small amount of residual monomers, wherein the vinylpyrrolidone polymer can display excellent properties even if the vinylpyrrolidone polymer is, for example, crosslinked to convert it into a water-absorbent resin. The production process for a vinylpyrrolidone polymer comprises the step of polymerizing a polymerizable monomer component or components which include N-vinylpyrrolidone, wherein: the N-vinylpyrrolidone as used is N-vinylpyrrolidone having a &ggr;-butyrolactone content of not more than 500 ppm; and/or the N-vinylpyrrolidone as used is N-vinylpyrrolidone obtained without using acetylene as a raw material.

    Process for reducing monomer content in N-vinyl compound polymers
    7.
    发明授权
    Process for reducing monomer content in N-vinyl compound polymers 有权
    降低N-乙烯基化合物聚合物中单体含量的方法

    公开(公告)号：US07160957B2

    公开(公告)日：2007-01-09

    申请号：US10614193

    申请日：2003-07-08

    申请人： Toshiaki Kuriyama ,  Yasuko Inui

    发明人： Toshiaki Kuriyama ,  Yasuko Inui

    IPC分类号： C08F8/32

    CPC分类号： C08F126/00 ,  C08F6/006 ,  C08F226/10 ,  C08L39/00

    摘要： A method for residual monomer diminution by which a residual monomer is speedily removed from an N-vinyl compound polymer or the like without posing a problem such as an increase in ash content; and a process for producing an N-vinyl compound polymer solution or powder which has a regulated pH and is free from a decrease in pH with time.The method comprises adding an organic acid having a boiling point of 140° C. or higher at ordinary pressure to anaqueous solution of an N-vinyl compound polymer. The process comprises adding an organic base to an aqueous N-vinyl compound polymer solution having a pH lower than 7.0 to thereby neutralize the solution and regulate the pH thereof. Those operations are conducted in a reaction vessel in which a gaseous phase is regulated so as to have an oxygen concentration of 5.0% by volume or lower.

    摘要翻译： 残留单体减少的方法通过其残留单体从N-乙烯基化合物聚合物等中快速除去而不会引起诸如灰分含量增加的问题; 以及具有调节pH并且随着时间而不降低pH的N-乙烯基化合物聚合物溶液或粉末的制备方法。 该方法包括在常压下将沸点为140℃或更高的有机酸加入到N-乙烯基化合物聚合物的水溶液中。 该方法包括向pH低于7.0的N-乙烯基化合物水溶液水溶液中加入有机碱，从而中和溶液并调节其pH。 这些操作在调节气相以使氧浓度为5.0体积％以下的反应容器中进行。

    Process for reducing monomer content in N-vinyl compound polymers
    8.
    发明授权
    Process for reducing monomer content in N-vinyl compound polymers 有权
    降低N-乙烯基化合物聚合物中单体含量的方法

    公开(公告)号：US06617420B2

    公开(公告)日：2003-09-09

    申请号：US09920745

    申请日：2001-08-03

    申请人： Toshiaki Kuriyama ,  Yasuko Inui

    发明人： Toshiaki Kuriyama ,  Yasuko Inui

    IPC分类号： C08F2600

    CPC分类号： C08F126/00 ,  C08F6/006 ,  C08F226/10 ,  C08L39/00

    摘要： A method for residual monomer diminution by which a residual monomer is speedily removed from an N-vinyl compound polymer or the like without posing a problem such as an increase in ash content; and a process for producing an N-vinyl compound polymer solution or powder which has a regulated pH and is free from a decrease in pH with time. The method comprises adding an organic acid having a boiling point of 140° C. or higher at ordinary pressure to an aqueous solution of an N-vinyl compound polymer. The process comprises adding an organic base to an aqueous N-vinyl compound polymer solution having a pH lower than 7.0 to thereby neutralize the solution and regulate the pH thereof. Those operations are conducted in a reaction vessel in which a gaseous phase is regulated so as to have an oxygen concentration of 5.0% by volume or lower.

    摘要翻译： 残留单体减少的方法通过其残留单体从N-乙烯基化合物聚合物等中快速除去而不会引起诸如灰分含量增加的问题; 以及具有调节pH并且随着时间而不降低pH的N-乙烯基化合物聚合物溶液或粉末的制备方法。 该方法包括在常压下将沸点为140℃以上的有机酸加入到N-乙烯基化合物聚合物的水溶液中。 该方法包括向pH低于7.0的N-乙烯基化合物水溶液水溶液中加入有机碱，从而中和溶液并调节其pH。 这些操作在调节气相以使氧浓度为5.0体积％以下的反应容器中进行。