[특허]Process for the continuous preparation of water-absorbent polymers

Process for the continuous preparation of water-absorbent polymers 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C08J-003/24 A61L-015/22 A61L-015/60 C08F-006/00 B01J-019/20 B01J-019/22 C08F-220/06
출원번호	US-0364525 (2012-12-14)
등록번호	US-9255190 (2016-02-09)
우선권정보	EP-12150881 (2012-01-12)
국제출원번호	PCT/EP2012/075481 (2012-12-14)
국제공개번호	WO2013/104484 (2013-07-18)
발명자 / 주소	Plochinger, Harald Fricker, Daniel Walther, Richard Hager, Marc
출원인 / 주소	Evonik Industries AG
대리인 / 주소	Smith Moore Leatherwood LLP
인용정보	피인용 횟수 : 0 인용 특허 : 29

초록 ▼

The invention relates generally to a process for the preparation of water-absorbent polymer particles, including the process steps of preparing particulate water-absorbent polymer and mixing the particulate water-absorbent polymer with an aqueous crosslinker solution and heat-treating the mixture of particulate water-absorbent polymer in a horizontally operated mixing device, wherein the horizontally operated mixing device is hydraulically driven. The invention also relates to water-absorbent polymer particles obtainable by such a process.

대표청구항 ▼

1. A process for the preparation of water-absorbent polymer particles, comprising the process steps of preparing an aqueous monomer solution comprising at least partially neutralized, monoethylenically unsaturated monomers bearing carboxylic acid groups (α1) and at least one crosslinker (α3);adding a polymerization initiator or a at least one component of a polymerization initiator system that comprises two or more components to the aqueous monomer solution;decreasing the oxygen content of the aqueous monomer solution;charging the aqueous monomer solution into a polymerization reactor;polymerizing the monomers in the aqueous monomer solution in the polymerization reactor to form a polymer gel;discharging the polymer gel out of the polymerization reactor and comminuting the polymer gel thereby obtaining polymer gel particles;drying the polymer gel particles;grinding the dried polymer gel particles thereby obtaining particulate water-absorbent polymer particles;sizing the grinded water-absorbent polymer particles; andstep (xi) crosslinking the surface of the grinded and sized water-absorbent polymer particles;wherein process step (xi) comprises the steps of:(x1a) mixing the water-absorbent polymer particles with an aqueous crosslinker solution; and(x2a) heat-treating the mixture obtained in process step (x1a) in a horizontally operated mixing device,wherein the horizontally operated mixing device is hydraulically driven. 2. The process according to claim 1, wherein mixture obtained in process step (x1a) is heat-treated at a temperature in the range from 150 to 250° C. in the horizontally operated mixing device. 3. The process according to claim 1, wherein the horizontally operated mixing device comprises at least one rotating shaft and a hydraulic motor that converts hydraulic pressure and flow into torque and angular displacement, thereby forcing the shaft into rotation. 4. The process according to claim 3, wherein at least two paddles are provided on the rotating shafts. 5. The process according to claim 3, wherein an oil is used as the hydraulic liquid used in the hydraulic motor. 6. The process according to claim 1, wherein the average residence time of the water-absorbent polymer particles in the horizontally operated mixing device is in the range from 5 to 500 minutes. 7. The process according to claim 3, wherein the rotation speed of the shaft in the horizontally operated mixing device is in the range from 5 to 25 rpm.

이 특허에 인용된 특허 (29)

Tsubakimoto Tsuneo (Toyonaka JPX) Shimomura Tadao (Toyonaka JPX) Irie Yoshio (Ashiya JPX) Masuda Yoshihiko (Suita JPX), Absorbent resin composition and process for producing same.
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Schmidt, Mattias; Meyer, Axel; Fossum, Renae Dianna; Autran, Jean-Philippe Marie; Riegel, Ulrich; Daniel, Thomas; Bruhns, Stefan; Elliott, Mark; Haeberle, Karl, Absorbent structure with improved water-absorbing material.
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Schmidt, Mattias; Meyer, Axel; Fossum, Renae Dianna; Autran, Jean-Philippe Marie; Riegel, Ulrich; Daniel, Thomas; Bruhns, Stefan; Elliott, Mark; Haeberle, Karl, Absorbent structure with improved water-absorbing material comprising polyurethane, coalescing aid and antioxidant.
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Chmelir Miroslav (Krefeld DEX) Pauen Josef (Willich DEX), Apparatus for the continuous production of polymers and copolymers of water-soluble monomers.
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Dahmen Kurt (Mnchengladbach-Rheydt DEX) Mertens Richard (Krefeld DEX), Aqueous-liquid and blood-absorbing powdery reticulated polymers, process for producing the same and their use as absorbe.
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Iwako Hiroyuki (Tokyo JA), Continuous mixing machine for moistening powdered material.
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Fricker, Daniel; Gartner, Herbert; Hager, Marc; Harren, Jorg; Kohler, Hans-Peter; Plöchinger, Harald, Continuous process for the production of a superabsorbent polymer.
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Fricker, Daniel; Gartner, Herbert; Hager, Marc; Harren, Jörg; Kohler, Hans-Peter; Plöchinger, Harald, Continuous process for the production of a superabsorbent polymer.
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Kowalczyk James E. (Saginaw MI) Loomans Bernard A. (Saginaw MI), High horsepower hydraulically driven continuous mixing and processing system.
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Heide, Wilfried; Wickel, Stefan; Daniel, Thomas; Nilges, Joachim; Hofmann, Jurgen, Method for continuously producing cross-linked fine-particle geleous polymerizates.
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Makita Muneharu (Takatsuki JPX) Tanioku Shozo (Nara JPX), Method for producing improved water-absorbent resins.
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Kadonaga, Kenji; Dairoku, Yorimichi; Fujino, Shin-ichi; Okochi, Hiroko; Irie, Yoshio; Tahara, Hideyuki, Method for surface crosslinking water-absorbing resin and method for manufacturing water-absorbing resin.
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Dahmen Kurt,DEX ; Herrmann Edgar,DEX ; Pfluger Klaus,DEX, Powder-form cross-linked polymers capable of absorbing aqueous liquids and body fluids, method of preparing them and th.
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Klimmek Helmut (Krefeld DEX) Brehm Helmut (Krefeld DEX), Powder-form polymers which absorb, even under pressure, aqueous liquids and blood, a method of producing them and their.
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Brehm Helmut (Krefeld DEX) Hartan Hans-Georg (Kevelaer DEX), Powdery polymers capable of absorbing aqueous liquids, a process for their production and their use as absorbents.
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Mertens,Richard; Harren,Joerg, Powdery, cross-linked absorbent polymers method for the production thereof and their use.
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Mertens, Richard; Harren, Jörg, Powdery, cross-linked absorbent polymers, method for the production thereof, and their use.
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Mertens, Richard; Harren, Jorg, Powdery, crosslinked absorbent polymers, method for the production thereof, and their use.
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Weismantel, Matthias; Funk, Rüdiger; Blair, Leigh R.; Heitzhaus, Kevin D., Process for producing water-absorbing polymer particles.
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Chmelir Miroslav (Krefeld DEX) Pauen Josef (Willich DEX), Process for the continuous production of polymers and copolymers of water-soluble monomers.
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Fricker, Daniel; Gartner, Herbert; Hager, Marc; Harren, Jörg; Kohler, Hans-Peter; Plöchinger, Harald, Process for the production of a superabsorbent polymer.
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Fricker, Daniel; Gartner, Herbert; Hager, Marc; Harren, Jörg; Kohler, Hans-Peter; Plöchinger, Harald, Process for the production of a superabsorbent polymer.
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Gartner, Herbert; Harren, Jorg; Hager, Marc; Plochinger, Harald; Fricker, Daniel; Kohler, Hans-Peter; Auernig, Sabine, Process for the production of a superabsorbent polymer.
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Gartner, Herbert; Harren, Jorg; Hager, Marc; Plochinger, Harald; Fricker, Daniel; Kohler, Hans-Peter; Auernig, Sabine, Process for the production of a superabsorbent polymer.
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Bauer Volker (Duesseldorf DEX) Raehse Wilfried (Duesseldorf DEX) Syldath Andreas (Duesseldorf DEX) Kischkel Ditmar (Monheim DEX), Process for the production of washing- and cleaning-active granules.
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Mertens, Richard; Jōrg, Harren, Pulverulent, cross-linked polymers capable of absorbing aqueous liquids.
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Mertens,Richard; J철rg,Harren, Pulverulent, cross-linked polymers capable of absorbing aqueous liquids.
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Barthell Eduard (Krefeld DEX) Schmid Otto (Krefeld DEX), Thickening urinary and intestinal tract excrement.
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Masuda ; Fusayoshi ; Nishida ; Kazuo ; Nakamura ; Akira, Water absorbing starch resins.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Process for the continuous preparation of water-absorbent polymers 원문보기

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