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1. 发明授权

US06310156B1 (Meth) acrylic acid polymer and manufacturing method thereof 有权
标题翻译：（甲基）丙烯酸聚合物及其制造方法
公开(公告)号：US06310156B1
公开(公告)日：2001-10-30
申请号：US09262011
申请日：1999-03-04
申请人： Yoshihiro Maeda , Tamao Ishida , Shigeru Yamaguchi
发明人： Yoshihiro Maeda , Tamao Ishida , Shigeru Yamaguchi
IPC分类号： C08F200
CPC分类号： C11D3/378 , C08F20/06 , C11D3/3757 , C23F11/173 , C23F14/02
摘要： A (meth)acrylic acid polymer is obtained by conducting a polymerization reaction using 60 mol % or more of a hydrophilic monomer containing (meth)acrylic acid and a combination of at least one kind of persulfate salts and at least one kind of bisulfite salts as an initiator series under conditions that a pH is smaller than 5 and a degree of neutralization is smaller than 40 mol %, in such a manner that a solid concentration when the polymerization reaction ends is 40% or higher. The resulting polymer has a weight average molecular weight ranging from 3,000 to 15,000, a sulfonic acid group at an end terminal, and an anti-gelling ability Q-value smaller than 2.0, where the anti-gelling ability Q-value is defined as: Q = degree of gelling × 10 5 weight average molecular weigh ⁢ t . Consequently, it has become possible to provide a low-molecular-weight (meth)acrylic acid polymer having not only excellent dispersing ability and chleating ability, but also high resistance to gelling, and an efficient manufacturing method of such a polymer.
摘要翻译：通过使用60摩尔％以上的含有（甲基）丙烯酸的亲水性单体和至少一种过硫酸盐和至少一种亚硫酸氢盐的组合进行聚合反应来获得（甲基）丙烯酸聚合物，在pH小于5且中和度小于40摩尔％的条件下，使聚合反应结束时的固体浓度为40％以上的引发剂系列。得到的聚合物的重均分子量为3,000〜15000，末端的磺酸基，抗凝胶性Q值小于2.0，其中抗凝胶化能力Q值定义为：因此，可以提供不仅具有优异的分散能力和洗涤能力，而且耐高凝胶性的低分子量（甲基）丙烯酸聚合物，以及这种聚合物的有效制造方法。

2. 发明授权

US06444771B1 Acrylic acid-maleic acid copolymer (or its salt), its production process and use, and production process for aqueous maleic salt solution with low impurity content 有权
标题翻译：丙烯酸 - 马来酸共聚物（或其盐），其生产工艺和用途以及含杂质含量低的马来酸盐水溶液的生产工艺
公开(公告)号：US06444771B1
公开(公告)日：2002-09-03
申请号：US09376177
申请日：1999-08-17
申请人： Shigeru Yamaguchi , Yoshihiro Maeda , Tamao Ishida
发明人： Shigeru Yamaguchi , Yoshihiro Maeda , Tamao Ishida
IPC分类号： C08J2006
CPC分类号： C11D3/3757 , C08F220/06 , C08F222/02 , C08F222/06
摘要： The present invention provides: an acrylic acid-maleic acid copolymer (or its salt) which is excellent in performances, such as Mg2+ scavengeability, clay dispersibility in the presence of Mg2+, inhibitability upon Mg(OH)2 scale, and inhibitability upon CaCO3 scale; and a production process for such a copolymer (or its salt). The present invention further provides a production process for an aqueous maleic salt solution with a low impurity content which has the advantage of easily giving the above copolymer (or its salt). The present invention still further provides uses of the above copolymer (or its salt) having the above excellent properties.
摘要翻译：本发明提供：在Mg2 +存在下Mg2 +清除能力，粘土分散性，Mg（OH）2垢抑制性，CaCO3垢抑制性等性能优异的丙烯酸 - 马来酸共聚物（或其盐） ; 以及这种共聚物（或其盐）的制造方法。本发明还提供具有低杂质含量的马来酸盐水溶液的制备方法，其具有容易得到上述共聚物（或其盐）的优点。本发明还提供上述具有上述优异性能的共聚物（或其盐）的用途。

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