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公开(公告)号：US09822203B2
公开(公告)日：2017-11-21
申请号：US14763185
申请日：2014-01-20
Applicant: BASF SE
Inventor： Monica Haag , Roland Krauss , Thomas Gieger , Volker Klock , Matthias Weismantel
IPC: C08F2/10 , C08F222/10 , C08F6/00 , C08F8/00 , C08J3/24 , A61L15/60 , C08F220/06
CPC classification number: C08F222/1006 , A61L15/60 , C08F2/10 , C08F220/06 , C08J3/245 , C08J2333/02 , C08F2222/1026 , C08L33/08
Abstract: A process for producing water-absorbing polymer particles having high free swell rate and high centrifuge retention capacity with simultaneously high permeability of the swollen gel bed by polymerization of an aqueous monomer solution in a polymerization reactor having at least two shafts (kneaders) which rotate in an axially parallel manner, subsequent extrusion at high temperatures and thermal surface postcrosslinking.
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公开(公告)号：US11560456B2
公开(公告)日：2023-01-24
申请号：US16470270
申请日：2017-12-15
Applicant: BASF SE
Inventor： Monica Haag , Stephan Deuerlein , Roland Krauss , Volker Klock , Holger Barthel
IPC: C08J3/075 , B29C48/68 , B29C48/00 , B29C48/395 , B29C48/53 , B29C48/625 , B29C48/685 , B29B7/42 , B29B7/82 , B29C48/05 , B29C48/345 , B29C48/535 , B29C48/04 , C08J3/24
Abstract: A single-screw extruder for changing a morphology of superabsorbent polymer gel. The single-screw extruder has an input aperture, a channel, a screw and an output aperture. The screw in the invention has a first pitch value of a pitch of the screw flights along the conveying zone of the channel and, following in conveying direction, has a second pitch value of the pitch of the screw flights along the conveying zone of the channel, where the second pitch value is smaller than the first pitch value.
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公开(公告)号：US20190330426A1
公开(公告)日：2019-10-31
申请号：US16470270
申请日：2017-12-15
Applicant: BASF SE
Inventor： Monica Haag , Stephan Deuerlein , Roland Krauss , Volker Klock , Holger Barthel
IPC: C08J3/075 , B29B7/42 , B29B7/82 , B29C48/00 , B29C48/04 , B29C48/395 , B29C48/53 , B29C48/625 , B29C48/68 , B29C48/685 , B29C48/345 , B29C48/535
Abstract: A single-screw extruder for changing a morphology of superabsorbent polymer gel. The single-screw extruder has an input aperture, a channel, a screw and an output aperture. The screw in the invention has a first pitch value of a pitch of the screw flights along the conveying zone of the channel and, following in conveying direction, has a second pitch value of the pitch of the screw flights along the conveying zone of the channel, where the second pitch value is smaller than the first pitch value.
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公开(公告)号：US20220080386A1
公开(公告)日：2022-03-17
申请号：US17419333
申请日：2020-01-13
Applicant: BASF SE
Inventor： Monica Haag , Stefan Gierescher
Abstract: A process for producing superabsorbent particles, comprising polymerization of a monomer preparation, drying of the resultant aqueous polymer gel, grinding, classifying and thermal surface postcrosslinking, wherein the monomer preparation is produced by mixing an aqueous monomer solution and a foamed aqueous surfactant solution.
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公开(公告)号：US20190308358A1
公开(公告)日：2019-10-10
申请号：US16470590
申请日：2017-12-15
Applicant: BASF SE
Inventor： Monica Haag , Stephan Deuerlein , Holger Barthel , Volker Klock , Roland Krauss
IPC: B29C48/00 , B29B7/42 , B29C48/395 , B29C48/535 , B29C48/625 , B29C48/63 , B29C48/685 , C08J3/075 , C08L101/14 , B29C48/68
Abstract: A single-screw extruder for changing a morphology of a superabsorbent polymer, specifically a polymer gel. The single-screw extruder has an input aperture, a channel, a screw and an output aperture. The screw has a pitch value of a pitch of the screw flights along the conveying zone of the channel, where the channel has a mixing-element arrangement with at least one mixing element which protrudes into the channel of the single-screw extruder and which is configured for the mixing of the SAP polymer gel.
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Patent Agency Ranking
公开(公告)号：US10179185B2
公开(公告)日：2019-01-15
申请号：US15308383
申请日：2015-05-07
Applicant: BASF SE
Inventor： Markus Braun , Monica Haag , Stephan Deuerlein , Volker Klock , Roland Krauss
Abstract: A process for producing water-absorbing polymer particles is provided, comprising a) a polymerization step in which an aqueous monomer solution comprising at least one ethylenically unsaturated monomer M which bears acid groups and may have been at least partly neutralized and at least one crosslinker is polymerized to obtain an aqueous polymer gel; b) a pelletization step in which the aqueous polymer gel having a solids content of 35 to 70% by weight and a temperature of 75 to 125° C. is forced from a high-pressure zone through a die plate into a low-pressure zone and pellets are obtained, the pressure differential between the high-pressure zone and the low-pressure zone being 4 to less than 14 bar and the orifice ratio of the die plate being 30 to 80%; c) a drying step in which the pellets are dried to a moisture content of less than 10% by weight; d) a grinding step and a classifying step to obtain water-absorbing polymer particles; and e) surface crosslinking of the water-absorbing polymer particles. The water-absorbing polymer particles have a high swell rate and a high retention capacity combined with a favorable ratio of permeability of the swollen gel bed SFC to centrifuge retention capacity CRC.
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公开(公告)号：US20170065739A1
公开(公告)日：2017-03-09
申请号：US15308383
申请日：2015-05-07
Applicant: BASF SE
Inventor： Markus Braun , Monica Haag , Stephan Deuerlein , Volker Klock , Roland Krauss
CPC classification number: A61L15/24 , A61L15/60 , B01J20/267 , B01J20/28011 , C08F2/001 , C08F2/10 , C08F220/06 , C08J3/245 , C08J2333/02 , C08F2222/1026 , C08L33/02
Abstract: A process for producing water-absorbing polymer particles is provided, comprising a) a polymerization step in which an aqueous monomer solution comprising at least one ethylenically unsaturated monomer M which bears acid groups and may have been at least partly neutralized and at least one crosslinker is polymerized to obtain an aqueous polymer gel; b) a pelletization step in which the aqueous polymer gel having a solids content of 35 to 70% by weight and a temperature of 75 to 125° C. is forced from a high-pressure zone through a die plate into a low-pressure zone and pellets are obtained, the pressure differential between the high-pressure zone and the low-pressure zone being 4 to less than 14 bar and the orifice ratio of the die plate being 30 to 80%; c) a drying step in which the pellets are dried to a moisture content of less than 10% by weight; d) a grinding step and a classifying step to obtain water-absorbing polymer particles; and e) surface crosslinking of the water-absorbing polymer particles. The water-absorbing polymer particles have a high swell rate and a high retention capacity combined with a favorable ratio of permeability of the swollen gel bed SFC to centrifuge retention capacity CRC.
Abstract translation: 提供了一种生产吸水性聚合物颗粒的方法，该方法包括：a）聚合步骤，其中包含至少一种带有酸基团且至少部分中和的至少一种烯属不饱和单体M的单体水溶液和至少一种交联剂是 聚合得到聚合物水凝胶; b）造粒步骤，其中固体含量为35至70重量％，温度为75至125℃的聚合物凝胶水凝胶被迫从高压区通过模板进入低压区 得到颗粒，高压区与低压区之间的压力差为4〜14巴，模板的孔径比为30〜80％。 c）干燥步骤，其中将颗粒干燥至含水量小于10重量％; d）研磨步骤和分级步骤以获得吸水性聚合物颗粒; 和e）吸水性聚合物颗粒的表面交联。 吸水性聚合物颗粒具有高的溶胀速率和高的保留能力以及膨胀的凝胶床SFC的渗透性与离心保留容量CRC的良好比率。
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公开(公告)号：US11458665B2
公开(公告)日：2022-10-04
申请号：US16470590
申请日：2017-12-15
Applicant: BASF SE
Inventor： Monica Haag , Stephan Deuerlein , Holger Barthel , Volker Klock , Roland Krauss
IPC: B29C48/00 , B29C48/63 , B29C48/68 , B29C48/395 , B29C48/535 , B29C48/625 , B29C48/685 , B29B7/42 , C08J3/075 , C08L101/14 , B29K105/00
Abstract: A single-screw extruder for changing a morphology of a superabsorbent polymer, specifically a polymer gel. The single-screw extruder has an input aperture, a channel, a screw and an output aperture. The screw has a pitch value of a pitch of the screw flights along the conveying zone of the channel, where the channel has a mixing-element arrangement with at least one mixing element which protrudes into the channel of the single-screw extruder and which is configured for the mixing of the SAP polymer gel.
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公开(公告)号：US09833766B2
公开(公告)日：2017-12-05
申请号：US15308382
申请日：2015-05-07
Applicant: BASF SE
Inventor： Markus Braun , Monica Haag , Stephan Deuerlein
IPC: B01J20/26 , C08F220/06 , A61L15/24 , A61L15/60 , B01J20/28 , C08J3/24 , C08F2/10 , C08F222/10
CPC classification number: B01J20/261 , A61L15/24 , A61L15/60 , B01J20/267 , B01J20/28004 , C08F2/10 , C08F220/06 , C08F2222/1026 , C08J3/245 , C08J2333/02
Abstract: Crosslinked polymer particles having a) a proportion of particles having a particle size of 150 to 300 μm of at least 20% by weight, b) a free swell rate of the entirety of the polymer particles FSRoverall of at least 0.25 g/g·s, c) a difference ΔFSR of at least 0.15, d) a centrifuge retention capacity CRC of at least 25.0 g/g, and e) a permeability of the swollen gel bed SFC of at least 90×10−7 cm3·s/g are disclosed.
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公开(公告)号：US20170050170A1
公开(公告)日：2017-02-23
申请号：US15308382
申请日：2015-05-07
Applicant: BASF SE
Inventor： Markus Braun , Monica Haag , Stephan Deuerlein
CPC classification number: B01J20/261 , A61L15/24 , A61L15/60 , B01J20/267 , B01J20/28004 , C08F2/10 , C08F220/06 , C08F2222/1026 , C08J3/245 , C08J2333/02
Abstract: Water-absorbing polymer particles are formed from crosslinked polymer chains comprising predominantly polymerized units of at least partly neutralized acrylic acid. They have a) a proportion of particles having a particle size of 150 to 300 μm of at least 20% by weight, b) a free swell rate of the entirety of the polymer particles FSRoverall of at least 0.25 g/g·s, c) a difference ΔFSR of at least 0.15, d) a centrifuge retention capacity CRC of at least 25.0 g/g, and e) a permeability of the swollen gel bed SFC of at least 90×10−7 cm3·s/g. ΔFSR is defined as =ΔFSR=FSR150-300 μm−FSRoverall in which FSR150-300 μm represents the free swell rate of the polymer particles having a particle size of 150 to 300 μm. The absorption capacity of the entirety of the polymer particles is substantially utilized even in the case of segregation of particles of different size.
Abstract translation: 其中FSR150-300μm表示粒径为150-300μm的聚合物颗粒的自由溶胀速率。 即使在不同尺寸的颗粒分离的情况下，也可以充分利用聚合物颗粒整体的吸收能力。
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