公开(公告)号：US5942573A

公开(公告)日：1999-08-24

申请号：US881372

申请日：1997-06-24

申请人： Hirotoshi Doki ,  Hitoshi Ishigaki ,  Toshiki Oyanagi ,  Tsugio Matsubara ,  Shigeo Watanabe

发明人： Hirotoshi Doki ,  Hitoshi Ishigaki ,  Toshiki Oyanagi ,  Tsugio Matsubara ,  Shigeo Watanabe

IPC分类号： C08F220/56 ,  C08F228/00 ,  D21H17/37 ,  D21H21/18 ,  C08L33/26 ,  C08L41/00

CPC分类号： D21H17/375 ,  C08F220/56 ,  D21H21/18

摘要： Provided by this invention are an acrylamide polymer which has a weight-average molecular weight (a) of from 1,500,000 to 10,000,000 and a weight-average inertial radius (b) of from 30 to 150 nm, the ratio (b)/(a) of the weight-average inertial radius (b) to the weight-average molecular weight (a) being 0.00004 or smaller; and an aqueous solution of an acrylamide polymer which solution has a polymer concentration ranging from 22 to 60%, a Brookfield viscosity at 25.degree. C. of 50,000 cps or smaller and a weight-average molecular weight of from 500,000 to 10,000,000. They are useful as paper strength agents.

摘要翻译： 本发明提供的重均分子量（a）为1,500,000至10,000,000，重均平均惯性半径（b）为30至150nm，比例（b）/（a） 的重均分子量（a）为0.00004以下; 丙烯酰胺聚合物的水溶液，其聚合物浓度为22〜60％，25℃下的Brookfield粘度为50,000cps以下，重均分子量为500,000〜10,000,000。 它们作为纸张强度剂是有用的。

公开(公告)号：US5627249A

公开(公告)日：1997-05-06

申请号：US363268

申请日：1994-12-23

申请人： Hirotoshi Doki ,  Hitoshi Ishigaki ,  Toshiki Oyanagi ,  Tsugio Matsubara ,  Shigeo Watanabe

发明人： Hirotoshi Doki ,  Hitoshi Ishigaki ,  Toshiki Oyanagi ,  Tsugio Matsubara ,  Shigeo Watanabe

IPC分类号： C08F220/56 ,  C08F228/00 ,  D21H17/37 ,  D21H21/18 ,  C08F228/02

CPC分类号： D21H17/375 ,  C08F220/56 ,  D21H21/18

摘要： Provided by this invention are an acrylamide polymer which has a weight-average molecular weight (a) of from 1,500,000 to 10,000,000 and a weight-average inertial radius (b) of from 30 to 150 nm, the ratio (b)/(a) of the weight-average inertial radius (b) to the weight-average molecular weight (a) being 0.00004 or smaller; and an aqueous solution of an acrylamide polymer which solution has a polymer concentration ranging from 22 to 60%, a Brookfield viscosity at 25.degree. C. of 50,000 cps or smaller and a weight-average molecular weight of from 500,000 to 10,000,000. They are useful as paper strength agents.

摘要翻译： 本发明提供的重均分子量（a）为1,500,000至10,000,000，重均平均惯性半径（b）为30至150nm，比例（b）/（a） 的重均分子量（a）为0.00004以下; 丙烯酰胺聚合物的水溶液，其聚合物浓度为22〜60％，25℃下的Brookfield粘度为50,000cps以下，重均分子量为500,000〜10,000,000。 它们作为纸张强度剂是有用的。