-
1.发明授权
公开(公告)号：EP1583779B1
公开(公告)日：2006-06-14
申请号：EP03785770.3
申请日：2003-12-08
摘要： The invention relates to a method for producing low-odor, hydrogel-forming polymers based on acrylic acid. Said method comprises the following steps: a) a polymeric hydrogel is produced by radically polymerizing a monomer composition containing at least 50 percent by weight of acrylic acid in an aqueous polymerizing medium, and the hydrogel is transformed into a particle-shaped hydrogel or a powder forming a hydrogel; and optionally b) the particle-shaped hydrogel or the powder forming a hydrogel is treated with a crosslinking substance comprising at least two functional groups that are reactive towards the carboxyl groups of the polymer, optionally in a latent form. The inventive method is characterized by the fact that the acrylic acid used in step a) comprises a total amount of oligomers of less than 500 ppm, preferably no more than 400 ppm, and especially no more than 300 ppm, ppm referring to proportions by weight relative to the acrylic acid. Advantageously, the proportion of triacrylic acid (compound I in which x = 2) and higher oligomers of the acrylic acid amounts to less than 100 ppm, especially less than 50 ppm, and particularly less than 10 ppm.
-
2.发明授权
公开(公告)号：EP1326898B1
公开(公告)日：2005-01-12
申请号：EP01978432.1
申请日：2001-10-17
发明人： HEIDE, Wilfried , WICKEL, Stefan , DANIEL, Thomas , STÜVEN, Uwe
IPC分类号： C08F2/04 , C08F220/06 , C08F220/56 , C08F8/00 , B01J19/20
CPC分类号： C08F220/56 , C08F220/04
-
公开(公告)号：EP1583779A1
公开(公告)日：2005-10-12
申请号：EP03785770.3
申请日：2003-12-08
摘要： The invention relates to a method for producing low-odor, hydrogel-forming polymers based on acrylic acid. Said method comprises the following steps: a) a polymeric hydrogel is produced by radically polymerizing a monomer composition containing at least 50 percent by weight of acrylic acid in an aqueous polymerizing medium, and the hydrogel is transformed into a particle-shaped hydrogel or a powder forming a hydrogel; and optionally b) the particle-shaped hydrogel or the powder forming a hydrogel is treated with a crosslinking substance comprising at least two functional groups that are reactive towards the carboxyl groups of the polymer, optionally in a latent form. The inventive method is characterized by the fact that the acrylic acid used in step a) comprises a total amount of oligomers of less than 500 ppm, preferably no more than 400 ppm, and especially no more than 300 ppm, ppm referring to proportions by weight relative to the acrylic acid. Advantageously, the proportion of triacrylic acid (compound I in which x = 2) and higher oligomers of the acrylic acid amounts to less than 100 ppm, especially less than 50 ppm, and particularly less than 10 ppm.
摘要翻译： 本发明涉及生产基于丙烯酸的低气味水凝胶形成聚合物的方法。 所述方法包括以下步骤：a）通过在含水聚合介质中使含有至少50重量％的丙烯酸的单体组合物自由基聚合而制备聚合物水凝胶，并将该水凝胶转变成颗粒状水凝胶或粉末 形成水凝胶; 并且任选地b）用交联物质处理颗粒状水凝胶或形成水凝胶的粉末，所述交联物质包含至少两个对聚合物的羧基具有反应性的官能团，任选呈潜在形式。 本发明的方法的特征在于，步骤a）中使用的丙烯酸包含总量低于500ppm，优选不大于400ppm，并且特别是不大于300ppm的低聚物，指的是重量比 相对于丙烯酸。 有利地，三丙烯酸（其中x = 2的化合物I）和更高级的丙烯酸低聚物的比例小于100ppm，特别是小于50ppm，特别是小于10ppm。
-
公开(公告)号：EP1458423B1
公开(公告)日：2006-02-15
申请号：EP02799748.5
申请日：2002-12-18
摘要： The invention relates to novel super-absorbing polymers containing tocopherol, to a method for the production thereof using monomers containing tocopherol and carrying acid groups, especially acrylic acid, and to the use of the same for absorbing aqueous liquids.
-
5.发明公开
公开(公告)号：EP1326898A2
公开(公告)日：2003-07-16
申请号：EP01978432.1
申请日：2001-10-17
发明人： HEIDE, Wilfried , WICKEL, Stefan , DANIEL, Thomas , STÜVEN, Uwe
IPC分类号： C08F2/04 , C08F220/06 , C08F220/56 , C08F8/00 , B01J19/20
CPC分类号： C08F220/56 , C08F220/04
摘要： The invention relates to a cross-linked, water-swellable polymer that contains polymerized into it moieties of a) water-soluble, monoethylenically unsaturated monomers, and b) 0.001 to 5 mole % based on the monomers a) of a cross-linking combination, b1) a first cross-linking agent with at least two (meth)acrylic ester moieties in the molecule and b2) a second cross-linking agent with at least two (meth)allyloxy moieties in the molecule, the molar ratio of b1) to b2) ranging from 0.7:1 to 10:1. The polymer according to the invention has a balanced property profile as regards absorptivity, gel strength, absorption speed and extractable components and can be advantageously produced by a continuous method.
-
6.发明公开VERFAHREN ZUR KONTINUIERLICHEN HERSTELLUNG VON VERNETZTEN FEINTEILIGEN GELFÖRMIGEN POLYMERISATEN 有权PROCESS FOR聚合物凝胶的交联细颗粒连续生产
公开(公告)号：EP1237937A1
公开(公告)日：2002-09-11
申请号：EP00974512.6
申请日：2000-11-10
CPC分类号： C08F2/01 , B01J14/00 , B01J19/0013 , B01J19/20 , B01J2219/00033 , B01J2219/00063 , B01J2219/00085 , B01J2219/00094 , B01J2219/00123 , B01J2219/00128 , B01J2219/00162 , B01J2219/00166 , C08F2/10
摘要： The invention relates to a method for continuously producing cross-linked, fine-particle geleous polymerizates by copolymerizing: a) water-soluble, monoethylenically unsaturated monomers; b) 0.001 to 5 mol %, with regard to monomers (a), of monomers containing at least two ethylenically unsaturated double bonds, and; (c) 0 to 20 mol %, with regard to monomers (a), of water-insoluble monoethylenically unsaturated monomers in 20 to 80 wt. % of an aqueous solution in the presence of an initiator and at temperatures ranging from 0 to 140 °C, whereby the aqueous solution of the monomers, together with the initiator and an inert gas, are continuously fed to a kneader-mixer having at least two shafts which rotate parallel to the axis. A number of kneading and transport elements are situated on the shafts and deliver the substances, which are added at the entry to the kneader-mixer, in an axial direction to the end of the mixer. The inventive method is characterized in that the proportion of the heat dissipation effected by evaporating water out of the reaction mixture equals at least 5 % of the reaction heat, and the proportion of the heat dissipation effected by product discharge equals at least 25 % of the reaction heat, and the remaining heat dissipation is effected by cooling the reactor walls.
-
公开(公告)号：EP1516010A1
公开(公告)日：2005-03-23
申请号：EP03757035.5
申请日：2003-06-06
发明人： JAWOREK, Thomas , DANIEL, Thomas , WOLF, Lothar , KÖNIGER, Rainer , SCHWALM, Reinhold , HARTMANN, Gabriele , WICKEL, Stefan
IPC分类号： C08G65/332 , C07C69/54 , C07C67/08 , A61L15/60
CPC分类号： C08G65/3322 , A61L15/60 , C07C67/08 , C07C69/54
摘要： The invention relates to a method for the esterification of unsaturated acids with polyalcohols and the use of the thus obtained reaction mixtures.
-
8.发明公开
公开(公告)号：EP1507809A1
公开(公告)日：2005-02-23
申请号：EP03732349.0
申请日：2003-05-12
CPC分类号： C08F20/06
摘要： The invention relates to a method for producing a low-odor hydrogel-forming polymer based on acrylic acid, comprising the following steps: a) producing a polymeric hydrogel by radically polymerizing, in an aqueous polymerization medium, a monomer composition containing at least 50 wt. % of acrylic acid, and transforming the hydrogel into a particulate hydrogel or into a hydrogel-forming powder, and optionally; b) treating the particulate hydrogel or the hydrogel-forming powder with a crosslinking-active substance having at least two functional groups that react with the carboxyl groups of the polymer. The invention is characterized in that acrylic acid used in step a) contains less than 400 ppm ethanoic acid and/or propionic acid. The invention also relates to the hydrogel-forming polymers obtained according to said method, and to the use thereof.
-
公开(公告)号：EP1458423A1
公开(公告)日：2004-09-22
申请号：EP02799748.5
申请日：2002-12-18
摘要： The invention relates to novel super-absorbing polymers containing tocopherol, to a method for the production thereof using monomers containing tocopherol and carrying acid groups, especially acrylic acid, and to the use of the same for absorbing aqueous liquids.
-
10.发明授权VERFAHREN ZUR KONTINUIERLICHEN HERSTELLUNG VON VERNETZTEN FEINTEILIGEN GELFÖRMIGEN POLYMERISATEN 有权PROCESS FOR聚合物凝胶的交联细颗粒连续生产
公开(公告)号：EP1237937B1
公开(公告)日：2004-03-03
申请号：EP00974512.6
申请日：2000-11-10
CPC分类号： C08F2/01 , B01J14/00 , B01J19/0013 , B01J19/20 , B01J2219/00033 , B01J2219/00063 , B01J2219/00085 , B01J2219/00094 , B01J2219/00123 , B01J2219/00128 , B01J2219/00162 , B01J2219/00166 , C08F2/10
-
-
-
-
-
-
-
-
-
搜索结果
10 条记录 (耗时 0.018 秒)
