Polyacrylic acid (salt) water-absorbent resin, production process thereof, and acrylic acid used in polymerization for production of water-absorbent resin
원문보기
An embodiment of the present invention allows for the production, with a high productivity, of a water-absorbent resin having an improved relationship between absorption capacity and water-soluble polymer, which are conflicting properties of the water-absorbent resin, being easily controlled for pol
An embodiment of the present invention allows for the production, with a high productivity, of a water-absorbent resin having an improved relationship between absorption capacity and water-soluble polymer, which are conflicting properties of the water-absorbent resin, being easily controlled for polymerization reaction, being of no odor, being less colored, and being of high absorption properties (high absorption capacity under load and high PPUP). In one embodiment of the present invention, a process for producing a water-absorbent resin by polymerizing an acrylic acid composition including acrylic acid and/or its salt, the process includes: (a) the step of carrying out radical polymerization of the acrylic acid composition to form a hydrogel crosslinked polymer; and (b) the step of drying the hydrogel crosslinked polymer by application of heat, the acrylic acid composition having an unpolymerizable organic compound content of 1 to 1000 ppm by weight, wherein the unpolymerizable organic compound has a solubility parameter of (1.0 to 2.5)×104(Jm−3)1/2.
대표청구항▼
1. A process for producing a water-absorbent resin by polymerizing an acrylic acid composition including at least one of acrylic acid and its salt, the process comprising:(a) the step of carrying out aqueous solution polymerization of the acrylic acid composition to form a hydrogel crosslinked polym
1. A process for producing a water-absorbent resin by polymerizing an acrylic acid composition including at least one of acrylic acid and its salt, the process comprising:(a) the step of carrying out aqueous solution polymerization of the acrylic acid composition to form a hydrogel crosslinked polymer; and(b) the step of drying the hydrogel crosslinked polymer by application of heat,the acrylic acid composition having an unpolymerizable organic compound content of 1 to 1000 ppm by weight, wherein the unpolymerizable organic compound has a solubility parameter of (1.0 to 2.5)×104 (Jm−3) 1/2. 2. The process according to claim 1, wherein: the unpolymerizable organic compound is included or added in advance in the acrylic acid composition. 3. The process according to claim 2, wherein: the acrylic acid composition is purified so that a content of the unpolymerizable organic compound included in the acrylic acid composition is adjusted to 1 to 1000 ppm by weight. 4. The process according to claim 1, wherein: the unpolymerizable organic compound is at least one compound selected from the group consisting of heptane, dimethyl cyclohexane, ethyl cyclohexane, toluene, ethylbenzene, xylene, diethyl ketone, diisopropyl ketone, methyl propyl ketone, methyl isobutyl ketone, methyl-t-butyl ketone, n-propyl acetate, n-butyl acetate, diphenyl ether, and diphenyl. 5. The process according to claim 1, wherein: the unpolymerizable organic compound is an aromatic compound. 6. The process according to claim 1, further comprising: after the step (b), (c) the step of subjecting the hydrogel crosslinked polymer to surface-crosslinking treatment by application of heat. 7. The process according to claim 6, wherein: in the steps (b) and (c), the heat is at a temperature not lower than a boiling point of the unpolymerizable organic compound. 8. The process according to claim 1, wherein: in the step (b), the drying is hot-air drying with a gas having a dew point of 50 to 100° C. 9. The process according to claim 1, wherein: the acrylic acid composition includes: methoxyphenol content of which is 10 to 200 ppm by weight; at least one compound content of which is 1 to 1000 ppm by weight, the compound being selected from the group consisting of β-hydroxypropionic acid and acrylic acid dimer; and phenothiazine content of which is 0 to 0.1 ppm by weight. 10. The process according to claim 1, wherein: the step (a) is a step of neutralizing the acrylic acid composition with a basic composition; and then carrying out aqueous solution polymerization of a resultant neutralized product, thereby forming a hydrogel crosslinked polymer,the basic composition including a basic compound and iron,the basic composition having an iron content of 0.2 to 5.0 ppm by weight in terms of Fe2O3.
Sato Kazuo,JPX ; Saito Akio,JPX ; Toyama Toshimitsu,JPX, 13-substituted milbemycin 5-oxime derivatives, their preparation and their use against insects and other pests.
Melius Mark K. (Appleton WI) Yarbrough Sandra M. (Menasha WI) Putzer Melissa C. (Oshkosh WI) Kellenberger Stanley R. (Appleton WI) Byerly Shannon K. (Appleton WI), Absorbent composite.
Goldman Stephen A. (Cincinnati OH) Retzsch Herbert L. (Cincinnati OH) Mansfield Todd L. (Cincinnati OH), Absorbent members for body fluids having good wet integrity and relatively high concentrations of hydrogel-forming absor.
Goldman Stephen A. (Wyoming OH) Haynes Nancy A. (Okeana OH) Mansfield Todd L. (Cincinnati OH) Plischke Manfred (Steinbach DEX) Retzsch Herbert L. (Cincinnati OH) Walker Trevor (Cincinnati OH) Young G, Absorbent members for body fluids having good wet integrity and relatively high concentrations of hydrogel-forming absor.
Goldman Stephen Allen (Wyoming OH) Haynes Nancy Ann (Okeana OH) Mansfield Todd Leon (Cincinnati OH) Plischke Manfred (Steinbach DEX) Retzsch Herbert Louis (Cincinnati OH) Walker Trevor (Cincinnati OH, Absorbent members for body fluids having good wet integrity and relatively high concentrations of hydrogel-forming absor.
Hird Bryn ; Ashraf Arman ; Goldman Stephen Allen,ITX ; Dyer John Collins ; Magness Robert Earl, Absorbent polymer compositions having high sorption capacities under an applied pressure.
Roe Donald C. (Cincinnati OH), Absorbent structures containing specific particle size distributions of superabsorbent hydrogel-forming materials mixed.
Goldman Stephen A. (Wyoming OH) Horney James C. (Cincinnati OH) Retzsch Herbert L. (Cincinnati OH), Absorbent structures with gelling agent and absorbent articles containing such structures.
Chmelir Miroslav (Grnkesdyk 36 4150 Krefeld DEX) Dahmen Kurt (von-Velsen.str.6 MDEX) Hoffman Georg (Westwall 165 4150 Krefeld DEX) Werner Georg (Dresdner Str.7 4154 Tnisvorst 1 DEX), Absorbents for blood and serous body fluids.
Chmelir Miroslav (Krefeld DEX) Dahmen Kurt (Mochen-Gladbach DEX) Hoffman Georg (Lexgaard DEX) Werner Georg (Tonisvorst DEX), Absorbents for blood and serous body fluids.
Nakahara,Sei; Ishizaki,Kunihiko; Fujimaru,Hirotama; Nakashima,Yasuhisa; Sakamoto,Kazuhiko, Acrylic acid composition and its production process, and process for producing water-absorbent resin using this acrylic acid composition, and water-absorbent resin.
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.
Holdaway Richard G. (Tampa FL) Cannon Julian E. (Brandon FL) Horgen Gordon W. (St. Petersburg FL) Van Heugten Anthony Y. (Tampa FL) Egolf ; Jr. John W. (Palm Harbor FL), Catheter assemblies for prevention of blood leakage.
Kajikawa, Katsuhiro; Nishioka, Toru; Fujimaru, Hirotama; Ishizaki, Kunihiko, Continuous production process for water-absorbent resin powder and powder surface detector used therefor.
Funk Rudiger,DEX ; Herfert Norbert,DEX ; Wanior Mariola,DEX ; Brown Patricia D. ; Engelhardt Fritz ; Woodrum Guy T., Crosslinked, hydrophilic, highly swellable hydrogels, production thereof and use thereof.
Sumakeris, Joseph John; Paisley, Michael James; O'Loughlin, Michael John, Deposition systems and susceptor assemblies for depositing a film on a substrate.
Long ; II Carl J. (Elyria OH) Amjad Zahid (Brecksville OH) Masler ; III William F. (Hinckley OH) Wingo William H. (North Royalton OH), Easy to disperse polycarboxylic acid thickeners.
Stockhausen Dolf,DEX ; Hartan Hans-Georg,DEX ; Brehm Helmut,DEX ; Jonas Gerd,DEX ; Messner Bernfried ; Pflueger Klaus,DEX, Fluid-absorbing polymers, processes used in their production and their application.
Brandt Kerryn A. (Cincinnati OH) Goldman Stephen A. (Cincinnati OH) Inglin Thomas A. (Cincinnati OH), Hydrogel-forming polymer compositions for use in absorbent structures.
Brandt Kerryn A. (Cincinnati OH) Goldman Stephen A. (Wyoming OH) Inglin Thomas A. (West Chester OH), Hydrogel-forming polymer compositions for use in absorbent structures.
Lange, Nancy Birbiglia; Reeves, William Grover; Melius, Shannon Kathleen, Material enhancement to maintain high absorbent capacity under high loads following rigorous process conditions.
Tanaka Keiji,JPX ; Date Masashi,JPX ; Tsubota Kenjiro,JPX ; Yuki Tsuyoshi,JPX ; Tamabuchi Satoshi,JPX, Method for producing water absorbent resin and water absorbent.
Irie Yoshio (Himeji JPX) Hatsuda Takumi (Himeji JPX) Yonemura Koichi (Suita JPX), Method for production of particulate hydrated gel polymer and absorbent resin.
Riegel, Ulrich; Weismantel, Matthias; Frenz, Volker; Daniel, Thomas; Engelhardt, Fritz, Method for the secondary cross-linking of hydrogels with 2-oxotetrahydro-1,3-oxazines.
Riegel, Ulrich; Weismantel, Matthias; Frenz, Volker; Daniel, Thomas; Engelhardt, Fritz, Method for the secondary cross-linking of hydrogels with N-acyl-2-oxazolidinones.
Gartner Herbert (Baden-Baden DEX) Petri Roswitha (Wissembourg FRX) Trijasson ; deceased Philippe (late of Strasbourg FRX by Fabienne Jeanne Trijasson Heir at Law and Guardian for Florian Trijasson ; , Method of preparation of crosslinked hydrophilic resins.
Weaver Mary Ollidene (Peoria IL) Bagley Edward B. (Morton IL) Fanta George F. (Peoria IL) Doane William M. (Morton IL), Method of reducing water content of emulsions, suspensions, and dispersions with highly absorbent starch-containing poly.
Hansen Michael R. (515 N. 149th Seattle WA 98133) Young ; Sr. Richard H. (13910 147th Pl. SE. Renton WA 98059), Non-polymeric organic binders for binding particles to fibers.
Bosley John A. (Higham Ferrers GB2) Maddison Vicki (Bedford GB2) McKinnon Alan A. (Higham Ferrers GB2), Particulate absorbant material surface treated with polyether to improve dispersibility in blood.
Dairoku, Yorimichi; Adachi, Yoshifumi; Nogi, Kozo; Inoue, Hiroki; Wada, Katsuyuki; Irie, Yoshio, Particulate water absorbent agent and production method thereof, and water absorbent article.
Dairoku,Yorimichi; Adachi,Yoshifumi; Nogi,Kozo; Inoue,Hiroki; Wada,Katsuyuki; Irie,Yoshio, Particulate water absorbent agent and production method thereof, and water absorbent article.
Adachi,Yoshifumi; Kitano,Takahiro; Fujimaru,Hirotama; Ikeuchi,Hiroyuki; Wada,Katsuyuki, Particulate water absorbent containing water absorbent resin as a main component.
Nagashima, Teruhisa; Nakamura, Masatoshi; Watanabe, Yusuke; Nogi, Kozo; Ishizaki, Kunihiko, Particulate water absorbing agent and method for producing the same.
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.
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.
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.
Mertens, Richard; Harren, Jorg, Powdery, cross-linked polymers which absorb aqueous liquids and blood, method for the production thereof and their use.
Harada Nobuyuki,JPX ; Ishizaki Kunihiko,JPX ; Fujimaru Hirotama,JPX ; Kitayama Toshimasa,JPX, Pressure-resistant absorbent resin, disposable diaper using the resin, and absorbent resin, and method for production thereof.
Rudiger Funk DE; Volker Frenz DE; Ulrich Riegel DE; Matthias Weismantel DE; Fritz Engelhardt ; Thomas Daniel, Process for crosslinking hydrogels with bis- and poly-2- oxazolidinones.
Sizyakov Viktor M. (Leningrad SUX) Kaluzhsky Nikolai A. (Leningrad SUX) Badaiants Khoren A. (Pikalevo SUX) Kostin Ivan M. (Pikalevo SUX) Zatulovsky Isaak A. (Pikalevo SUX) Isakov Evgeny A. (Pikalevo , Process for desilication of aluminate solution.
Wada Katsuyuki,JPX ; Nagasuna Kinya,JPX ; Fujino Shin-ichi,JPX ; Masuda Yoshihiko,JPX, Process for manufacturing an absorbing agent and absorbent material.
Mueller Karl F. (New York NY) Heiber Sonia J. (Bedford Hills NY) Plankl Walter L. (Yorktown Heights NY), Process for preparing hydrogels as spherical beads of large size.
Ishizaki Kunihiko,JPX ; Obara Hisanobu,JPX ; Harada Nobuyuki,JPX ; Motono Yoshihiro,JPX ; Miyake Koji,JPX, Process for production of water absorbent resin.
Ito Kiichi (Yokkaichi JPX) Tsunoi Shinji (Yokkaichi JPX) Yamamoto Tetsuya (Yokkaichi JPX), Process for the production of highly water absorptive polymers.
Yoshida Tooru (Yokohama JPX) Iwagami Seigo (Tokyo JPX) Ueshima Takashi (Yokohama JPX) Hosoda Yoshikazu (Yokohama JPX), Process for the production of highly water-absorbing but less water-soluble hydrogels.
Dahmen Kurt (Mnchengladbach-Rheydt DEX) Mertens Richard (Dahlerdyk DEX) Brehm Helmut (Dachsstrasse DEX), Process for the production of water-swellable products using superfines of water-swellable polymers.
Taylor James W. (Kingsport TN) Collins Martha J. (Blountville TN) Bassett David R. (Cary NC), Reactive polymers having pendant flexible side chains prepared from ethylenically unsaturated carbodiimides.
Chambers Douglas R. (Chesapeake VA) Chiang William G-J (Virginia Beach VA) Woodrum Guy T. (Chesapeake VA), Superabsorbent polymers and products therefrom.
Sun Fang ; Jones Heather S. ; Kaiser Thomas A. ; Hsu Whei-Neen ; Molen Ronald L. ; Deaton Peter A. ; Messner Bernfried A., Superabsorbent polymers having anti-caking characteristics.
Gartner Herbert (Baden-Baden DEX) Burgert Josef (Achern-Fautenbach DEX), Surface crosslinked and surfactant coated absorbent resin particles and method of preparation.
Ganslaw Stuart H. (Piscataway NJ) Katz Howard G. (East Windsor NJ), Surface treatment process for improving dispersibility of an absorbent composition, and product thereof.
Torii, Kazushi; Shibata, Hirofumi; Kimura, Kazuki; Nakashima, Yasuhisa; Imura, Motohiro; Ueda, Hiroko; Wada, Katsuyuki, Water absorbing agent, water absorbent core using the agent, and manufacturing method for water absorbing agent.
Dairoku,Yorimichi; Nagasuna,Kinya; Masuda,Yoshihiko; Harada,Nobuyuki; Motono,Yoshihiro; Ishizaki,Kunihiko, Water-absorbent agent, method for production thereof, and water-absorbent composition.
Kazuhisa Hitomi JP; Yuji Yamamoto JP; Shigenori Kirimura JP; Nobuyuki Harada JP, Water-absorbing composition and production process for water-absorbing agent.
Hans-Joachim Hahnle DE; Ulrich Schroder DE; Martin Beck DE; Wolfgang Heider DE; Gunnar Schornick DE; Thomas Anstock DE, Water-absorbing, cross-linked polymerizates in the form of a foam, a method for the production thereof, and their use.
Breitbach Ludger,DEX ; Dahmen Kurt,DEX ; Houben Jochen,DEX ; Kuster Erich,DEX, Water-swelling polymers cross-linked with unsaturated amino alcohols, the production and use of same.
Rardon Daniel E. (Pittsburgh PA) Martin Roxalana L. (Pittsburgh PA) Faler Dennis L. (Pittsburgh PA) Poole James E. (Gibsonia PA), Waterborne coating compositions having improved smoothness.
Hansen Michael R. (Seattle WA) Young ; Sr. Richard H. (Federal Way WA), Wet laid fiber sheet manufacturing with reactivatable binders for binding particles to fibers.
Stanley ; Jr. ; deceased Frederick W. ; Lamphere Jack C. ; Wilson Larry R., Wrinkled absorbent particles of high effective surface area having fast absorption rate.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.