公开(公告)号：US06486281B1

公开(公告)日：2002-11-26

申请号：US09914267

申请日：2001-08-24

申请人： Akira Kitada ,  Keiichi Fujise ,  Itsuko Hamaguchi

发明人： Akira Kitada ,  Keiichi Fujise ,  Itsuko Hamaguchi

IPC分类号： C08F2608

CPC分类号： C08F26/10 ,  C08F6/02 ,  C08L39/06

摘要： A process for preparing a high purity vinylpyrrolidone polymer which dissolves clearly in an organic solvent can be provided. The process for preparing a high purity vinylpyrrolidone polymer, wherein vinylpyrrolidone is polymerized by using a redox initiator comprising an organic peroxide and a sulfite, and thereafter the product is contacted with an anion exchange resin to be purified.

摘要翻译： 可以提供一种制备清楚地溶解在有机溶剂中的高纯度乙烯基吡咯烷酮聚合物的方法。 制备高纯度乙烯基吡咯烷酮聚合物的方法，其中使用包含有机过氧化物和亚硫酸盐的氧化还原引发剂使乙烯基吡咯烷酮聚合，然后将产物与待纯化的阴离子交换树脂接触。

公开(公告)号：US06465592B1

公开(公告)日：2002-10-15

申请号：US09890763

申请日：2001-08-03

申请人： Akira Kitada ,  Keiichi Fujise ,  Itsuko Hamaguchi

发明人： Akira Kitada ,  Keiichi Fujise ,  Itsuko Hamaguchi

IPC分类号： C08F2608

CPC分类号： C08F16/10 ,  C08F26/10 ,  C08F226/10

摘要： A vinylpyrrolidone polymer which is little colored, gives off a bad smell little, and contains extremely little impurities is provided. The polymerization is performed by adding a water-soluble organic peroxide and a sulfite to a vinylpyrrolidone aqueous solution.

摘要翻译： 一种少许着色的乙烯基吡咯烷酮聚合物，几乎不发出臭味，并且含有极少的杂质。 通过向乙烯基吡咯烷酮水溶液中加入水溶性有机过氧化物和亚硫酸盐来进行聚合。

公开(公告)号：US20080033081A1

公开(公告)日：2008-02-07

申请号：US11888113

申请日：2007-07-31

申请人： Keiichi Fujise ,  Itsuko Hamaguchi ,  Akio Naka ,  Daijyo Tomihisa

发明人： Keiichi Fujise ,  Itsuko Hamaguchi ,  Akio Naka ,  Daijyo Tomihisa

IPC分类号： C08F26/10 ,  C08K5/3415

CPC分类号： C08K5/31 ,  C08K5/3415 ,  C08L39/06

摘要： Disclosed is a vinylpyrrolidone-based polymer composition which has improved storage stability and of which the reduction in the molecular weight (K value) under shear stress is small. The composition comprises a vinylpyrrolidone-based polymer and contains from 1 to 10000 ppm of at least one compound selected from a group consisting of biguanides and further contains from 1000 to 30000 ppm of 2-pyrrolidone and from 1 to 5000 ppm of ammonia.

摘要翻译： 公开了一种具有改善的储存稳定性并且其剪切应力下分子量（K值）降低小的乙烯基吡咯烷酮基聚合物组合物。 该组合物包含基于乙烯基吡咯烷酮的聚合物，并且含有1至10000ppm的至少一种选自双胍的化合物，并且还包含1000至30000ppm的2-吡咯烷酮和1至5000ppm的氨。

公开(公告)号：US07700674B2

公开(公告)日：2010-04-20

申请号：US11888113

申请日：2007-07-31

申请人： Keiichi Fujise ,  Itsuko Hamaguchi ,  Akio Naka ,  Daijyo Tomihisa

发明人： Keiichi Fujise ,  Itsuko Hamaguchi ,  Akio Naka ,  Daijyo Tomihisa

IPC分类号： C08F26/10

CPC分类号： C08K5/31 ,  C08K5/3415 ,  C08L39/06

摘要： Disclosed is a vinylpyrrolidone-based polymer composition which has improved storage stability and of which the reduction in the molecular weight (K value) under shear stress is small. The composition comprises a vinylpyrrolidone-based polymer and contains from 1 to 10000 ppm of at least one compound selected from a group consisting of biguanides and further contains from 1000 to 30000 ppm of 2-pyrrolidone and from 1 to 5000 ppm of ammonia.

摘要翻译： 公开了一种具有改善的储存稳定性并且其剪切应力下分子量（K值）降低小的乙烯基吡咯烷酮基聚合物组合物。 该组合物包含基于乙烯基吡咯烷酮的聚合物，并且含有1至10000ppm的至少一种选自双胍的化合物，并且还包含1000至30000ppm的2-吡咯烷酮和1至5000ppm的氨。