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1. (WO2018159803) WATER-ABSORBENT RESIN, AND SOIL
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Pub. No.: WO/2018/159803 International Application No.: PCT/JP2018/007962
Publication Date: 07.09.2018 International Filing Date: 02.03.2018
IPC:
C08F 20/06 (2006.01) ,E02B 3/04 (2006.01)
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
20
Homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide, or nitrile thereof
02
Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
04
Acids; Metal salts or ammonium salts thereof
06
Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
E FIXED CONSTRUCTIONS
02
HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
B
HYDRAULIC ENGINEERING
3
Engineering work in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering work in general
04
Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
Applicants:
住友精化株式会社 SUMITOMO SEIKA CHEMICALS CO., LTD. [JP/JP]; 兵庫県加古郡播磨町宮西346番地の1 346-1, Miyanishi, Harima-cho, Kako-gun, Hyogo 6750145, JP
Inventors:
千葉 実季人 CHIBA, Mikihito; JP
小野田 裕一 ONODA, Yuichi; JP
Agent:
田中 順也 TANAKA, Junya; JP
水谷 馨也 MIZUTANI, Keiya; JP
Priority Data:
2017-03898202.03.2017JP
Title (EN) WATER-ABSORBENT RESIN, AND SOIL
(FR) RÉSINE ABSORBANT L'EAU, ET TERRE
(JA) 吸水性樹脂及び土嚢
Abstract:
(EN) Provided is a water-absorbent resin that quickly absorbs water, even in soil in which a large amount of the water-absorbent resin has been used, that does not easily clump, and that has a high gel swelling volume when water is used to swell the water-absorbent resin. This water-absorbent resin is configured from a polymer of water-soluble ethylenic unsaturated monomers. The physiological-saline absorption capacity of the water-absorbent resin is 40–60 g/g. When a cross-sectional image of the water-absorbent resin is observed by x-ray computed tomography, the fraction of the area of the cross-sectional image that is hollow portions (the hollow area ratio of the cross-sectional image), as calculated on the basis of formula (I), is no more than 10%. (I) Hollow area ratio [%]={total cross-sectional area (B) of hollow portions of the water-absorbent resin/(total cross-sectional area (A) of resin portions of the water-absorbent resin + total cross-sectional area (B) of hollow portions of the water-absorbent resin)}×100%.
(FR) L'invention concerne une résine absorbant l'eau qui absorbe rapidement l'eau, même dans de la terre dans laquelle une grande quantité de la résine absorbant l'eau a été utilisée. La résine ne s'agglomère pas facilement, et présente un volume élevé de gonflement du gel lorsque de l'eau est utilisée pour faire gonfler la résine absorbant l'eau. Cette résine absorbant l'eau est conçue à partir de monomères à insaturation éthylénique et solubles dans l'eau. La capacité d'absorption d'une solution salée physiologique de la résine absorbant l'eau est de 40 à 60 g/g. Quand on observe une image en coupe transversale de la résine absorbant l'eau par tomodensitométrie, la fraction de l'aire de l'image en coupe transversale qui correspond à des parties creuses (le taux d'aire creuse de l'image en coupe transversale), telle que calculée sur la base de la formule (I), n'est pas supérieure à 10 %. (I) Taux d'aire creuse [%]={aire totale en section transversale (B) des parties creuses de la résine absorbant l'eau/(aire totale en coupe transversale (A) des parties résine de la résine absorbant l'eau + aire totale en section transversale (B) des parties creuses de la résine absorbant l'eau)}×100 %.
(JA) 吸水性樹脂を多量に使用した土嚢においても、水に対する高い吸水速度を有し、さらに、ままこを形成し難く、水で吸水性樹脂を膨潤させた際に高いゲル膨潤容積を有する吸水性樹脂を提供する。 本発明の吸水性樹脂は、水溶性エチレン性不飽和単量体の重合体により構成された吸水性樹脂であって、生理食塩水吸水能が、40~60g/gであり、X線コンピューター断層撮影法によって、前記吸水性樹脂の断面画像を観察した場合に、下記式(I)によって算出される、前記断面画像における空洞部分の面積の割合(空洞面積率)が、10%以上である。 空洞面積率[%]={吸水性樹脂の空洞部分の総断面積(B)/(吸水性樹脂の樹脂部分の総断面積(A)+吸水性樹脂の空洞部分の総断面積(B))}×100・・・(I)
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)