公开(公告)号：US06602940B1

公开(公告)日：2003-08-05

申请号：US09076370

申请日：1998-05-11

申请人： Shin-ichi Sato ,  Takahiro Oshida ,  Takashi Ono ,  Kiyoji Kuma ,  Yasuharu Mori ,  Atsuo Takeuchi

发明人： Shin-ichi Sato ,  Takahiro Oshida ,  Takashi Ono ,  Kiyoji Kuma ,  Yasuharu Mori ,  Atsuo Takeuchi

IPC分类号： C08K506

CPC分类号： C08F8/12 ,  C08F8/44 ,  C08F226/02 ,  C08F220/44 ,  C08F220/14 ,  C08F126/02

摘要： A process for the preparation of an aqueous solution or dispersion containing a cationic polymer, which comprises the steps of: polymerizing a monomer including an N-vinyl-carboxylic acid amide represented by the general formula CH2═CHNHCOR, wherein R represents a hydrogen atom or methyl group, in an aqueous medium in the presence of either or both of a polyethylene glycol and polypropylene glycol; and then modifying the resulting polymer with an acid or base. Furthermore, an aqueous composition containing a cationic polymer, which comprises (A) a modified N-vinylcarboxylic acid amide polymer, (B) either or both of a polyethylene glycol and polypropylene glycol, and (C) water is disclosed.

摘要翻译： 一种制备含有阳离子聚合物的水溶液或分散体的方法，其包括以下步骤：使包含由通式CH 2 = CHNHCOR表示的N-乙烯基 - 羧酸酰胺的单体聚合，其中R表示氢原子或 甲基，在水性介质中，在聚乙二醇和聚丙二醇中的任一种或两者的存在下; 然后用酸或碱改性得到的聚合物。 此外，公开了包含（A）改性N-乙烯基羧酸酰胺聚合物，（B）聚乙二醇和聚丙二醇中的任一种或两者的阳离子聚合物和（C）水的含水组合物。

公开(公告)号：US5962570A

公开(公告)日：1999-10-05

申请号：US764981

申请日：1996-12-13

申请人： Shin-ichi Sato ,  Takahiro Oshida ,  Takashi Ono ,  Kiyoji Kuma ,  Yasuharu Mori ,  Atsuo Takeuchi

发明人： Shin-ichi Sato ,  Takahiro Oshida ,  Takashi Ono ,  Kiyoji Kuma ,  Yasuharu Mori ,  Atsuo Takeuchi

IPC分类号： C08F8/12 ,  C08J3/02

CPC分类号： C08F8/12

摘要： A process for the preparation of an aqueous solution or dispersion containing a cationic polymer, which comprises the steps of: polymerizing a monomer including an N-vinylcarboxylic acid amide represented by the general formula CH.sub.2 .dbd.CHNHCOR, wherein R represents a hydrogen atom or methyl group, in an aqueous medium in the presence of either or both of a polyethylene glycol and polypropylene glycol; and then modifying the resulting polymer with an acid or base. Furthermore, an aqueous composition containing a cationic polymer, which comprises (A) a modified N-vinylcarboxylic acid amide polymer, (B) either or both of a polyethylene glycol and polypropylene glycol, and (C) water is disclosed.

摘要翻译： 一种制备含有阳离子聚合物的水溶液或分散体的方法，其包括以下步骤：使包含由通式CH 2 = CHNHCOR表示的N-乙烯基羧酸酰胺的单体聚合，其中R表示氢原子或甲基 在水性介质中，在聚乙二醇和聚丙二醇中的任一种或两者的存在下; 然后用酸或碱改性得到的聚合物。 此外，公开了包含（A）改性N-乙烯基羧酸酰胺聚合物，（B）聚乙二醇和聚丙二醇中的任一种或两者的阳离子聚合物和（C）水的含水组合物。

公开(公告)号：US5959148A

公开(公告)日：1999-09-28

申请号：US828472

申请日：1997-03-31

申请人： Shin-ichi Sato ,  Takahiro Oshida ,  Hiroshi Izumikawa ,  Akihiko Tanaka ,  Eiichiro Koresawa

发明人： Shin-ichi Sato ,  Takahiro Oshida ,  Hiroshi Izumikawa ,  Akihiko Tanaka ,  Eiichiro Koresawa

IPC分类号： C07C231/24 ,  C07C233/03

CPC分类号： C07C231/24

摘要： A purification process of N-vinylformamide, which comprises: providing a crude N-vinylformamide having an acetone-insoluble component content of not more than 400 ppm; and continuously feeding the crude N-vinylformamide into a fractionating tower, to obtain an N-vinylformamide having high purity. Also disclose is a continuous purification process of N-vinylformamide, which comprises the steps of: providing a crude N-vinylformamide; feeding the crude N-vinylformamide into a thin film evaporator to remove un-evaporated fraction from the system, and feeding the evaporated fraction containing N-vinylformamide into a fractionating tower, distilling the purified N-vinylformamide from the tower head, and discharging a bottom liquid containing N-vinylformamide from the tower bottom, and recycling the bottom liquid into the thin film evaporator to remove un-evaporated fraction from the system, and feeding the evaporated fraction into the fractionating tower.

摘要翻译： 一种N-乙烯基甲酰胺的纯化方法，其包括：提供丙酮不溶组分含量不超过400ppm的粗N-乙烯基甲酰胺; 并将粗N-乙烯基甲酰胺连续进料到分馏塔中，得到高纯度的N-乙烯基甲酰胺。 还公开了N-乙烯基甲酰胺的连续纯化方法，其包括以下步骤：提供粗制N-乙烯基甲酰胺; 将粗N-乙烯基甲酰胺进料到薄膜蒸发器中以从系统中除去未蒸发的馏分，并将含有N-乙烯基甲酰胺的蒸馏馏分进料到分馏塔中，从塔头蒸馏纯化的N-乙烯基甲酰胺，并将塔底 液体含有来自塔底的N-乙烯基甲酰胺，并将底部液体再循环到薄膜蒸发器中以从系统中除去未蒸发的馏分，并将蒸发的馏分进料到分馏塔中。