JPS6223985B2 - - Google Patents
Info
- Publication number
- JPS6223985B2 JPS6223985B2 JP56130669A JP13066981A JPS6223985B2 JP S6223985 B2 JPS6223985 B2 JP S6223985B2 JP 56130669 A JP56130669 A JP 56130669A JP 13066981 A JP13066981 A JP 13066981A JP S6223985 B2 JPS6223985 B2 JP S6223985B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- polymer
- surfactant
- absorbing
- absorbing polymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229920000642 polymer Polymers 0.000 claims description 33
- 239000000203 mixture Substances 0.000 claims description 13
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims description 10
- 229920000578 graft copolymer Polymers 0.000 claims description 9
- 239000003945 anionic surfactant Substances 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 5
- 239000002736 nonionic surfactant Substances 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 229920000058 polyacrylate Polymers 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 229920002785 Croscarmellose sodium Polymers 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 239000004094 surface-active agent Substances 0.000 description 15
- -1 polyoxyethylene Polymers 0.000 description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 239000000243 solution Substances 0.000 description 8
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 7
- 239000008280 blood Substances 0.000 description 7
- 210000004369 blood Anatomy 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 239000002250 absorbent Substances 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 6
- 230000002745 absorbent Effects 0.000 description 5
- 239000011358 absorbing material Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- RNMDNPCBIKJCQP-UHFFFAOYSA-N 5-nonyl-7-oxabicyclo[4.1.0]hepta-1,3,5-trien-2-ol Chemical compound C(CCCCCCCC)C1=C2C(=C(C=C1)O)O2 RNMDNPCBIKJCQP-UHFFFAOYSA-N 0.000 description 2
- 239000001856 Ethyl cellulose Substances 0.000 description 2
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical class OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000019325 ethyl cellulose Nutrition 0.000 description 2
- 229920001249 ethyl cellulose Polymers 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- HBXWUCXDUUJDRB-UHFFFAOYSA-N 1-octadecoxyoctadecane Chemical compound CCCCCCCCCCCCCCCCCCOCCCCCCCCCCCCCCCCCC HBXWUCXDUUJDRB-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- WLDHEUZGFKACJH-ZRUFZDNISA-K Amaranth Chemical compound [Na+].[Na+].[Na+].C12=CC=C(S([O-])(=O)=O)C=C2C=C(S([O-])(=O)=O)C(O)=C1\N=N\C1=CC=C(S([O-])(=O)=O)C2=CC=CC=C12 WLDHEUZGFKACJH-ZRUFZDNISA-K 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229920001214 Polysorbate 60 Polymers 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical group CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 150000005215 alkyl ethers Chemical class 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- REZZEXDLIUJMMS-UHFFFAOYSA-M dimethyldioctadecylammonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CCCCCCCCCCCCCCCCCC REZZEXDLIUJMMS-UHFFFAOYSA-M 0.000 description 1
- 239000004664 distearyldimethylammonium chloride (DHTDMAC) Substances 0.000 description 1
- NPERTKSDHFSDLC-UHFFFAOYSA-N ethenol;prop-2-enoic acid Chemical compound OC=C.OC(=O)C=C NPERTKSDHFSDLC-UHFFFAOYSA-N 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 239000000017 hydrogel Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000002563 ionic surfactant Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002504 physiological saline solution Substances 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920000259 polyoxyethylene lauryl ether Polymers 0.000 description 1
- 235000010483 polyoxyethylene sorbitan monopalmitate Nutrition 0.000 description 1
- 239000000249 polyoxyethylene sorbitan monopalmitate Substances 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
Landscapes
- Absorbent Articles And Supports Therefor (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明は吸水性組成物に関する。更に詳しく
は、高吸水性であり、塩類溶液、血液に対し優れ
た吸収性を有する吸水性組成物に関する。
従来、紙、パルプ、海綿等が吸収ないし保水材
料として生理用ナプキン、紙オシメ等の衛生材料
及び農業分野に使用されてきたが、これらの材料
はその吸水能力が低く、しかも一旦吸収された水
も圧力が加わればそのかなりの部分がしぼり出さ
れてしまう。これらの材料に代わるものとして近
年デンプン−アクリルニトリルグラフト重合体の
加水分解物、変成セルロースエーテル並びにアク
リル酸メチル／酢酸ビニル共重合体の加水分解物
等のいくつかの吸水材料が提案され、改良もなさ
れてきている。しかしそれらはいずれも水に対し
ては優れた吸水性を示すものの塩類溶液、又は血
液に対して優れた吸収性を示すとは云い難く、満
足な吸水材料が得られていない。
本発明者は上記欠点を改良すべく鋭意研究を重
ねた結果、吸水ポリマーａと陰イオン性界面活性
剤及び／又はHLB7以上の非イオン性界面活性剤
ｂとを組み合わせることにより上記欠点を解決し
た吸水材料が得られることを見出し、本発明を完
成した。
即ち、本発明は、吸水ポリマーａと、該ポリマ
ーに対して0.01〜10重量パーセントの陰イオン性
界面活性剤及び／又はHLB7以上の非イオン性界
面活性剤ｂとからなる吸水性組成物を提供するも
のである。
本発明の吸水ポリマーとは水に溶解せず、水中
において自重の数百倍の水を吸収して膨潤しヒド
ロゲルを形成するものであり、例えばデンプン−
アクリルニトリルグラフト共重合体の加水分解
物、デンプン−アクリル酸グラフト重合体の中和
物、架橋カルボキシメチルセルロース、アクリル
酸メチル／酢酸ビニル共重合体の加水分解物、架
橋ポリアクリル酸塩、架橋ポリビニルアルコール
変成物等を挙げることができる。上記吸水ポリマ
ーは、例えばデンプン−アクリルニトリルグラフ
ト共重合体の加水分解物は特公昭49−43395号公
報、デンプン−アクリル酸グラフト重合体の中和
物は特公昭53−46199号公報、特公昭55−21041号
公報、アクリル酸メチル／酢酸ビニル共重合体の
加水分解物は特公昭53−13495号公報、特公昭55
−19243号公報、架橋ポリビニルアルコール変成
物は特開昭54−20093号公報、特開昭54−143496
号公報、架橋ポリアクリル酸塩は特開昭51−
112787号公報、特開昭55−84304号公報に開示さ
れている方法により製造することもあるいは市販
されているので購入することも出来る。
吸水ポリマーと界面活性剤とを組み合わせるこ
とにより水分散性を改良する方法はすでに特開昭
54−76652号公報に開示されている。この方法は
デンプン−アクリルニトリルグラフト共重合体の
加水分解物とカチオン性界面活性剤とを組み合わ
せたものである。しかしこの方法ではアニオンと
カチオンとを組み合わせるため分散性の優れたも
のを得るためには多量の界面活性剤を必要とする
欠点を有し、更に多量の界面活性剤を用いるため
出来た粉体の流動性が著しく悪くなると云う欠点
も有している。又、吸水材料として見た場合にも
性能は十分満足できるものでない。
本発明に使用される陰イオン性界面活性剤及び
HLB7以上の非イオン性界面活性剤としてはポリ
オキシエチレンアルキルエーテル、ポリオキシエ
チレンアルキルフエノールエーテル、ポリオキシ
エチレンソルビタン脂肪酸エステル、ポリオキシ
エチレン脂肪酸エステル、ポリオキシエチレンオ
キシプロピレンブロツクポリマー等のHLB7以上
の非イオン性界面活性剤、脂肪酸塩、アルキルナ
フタレンスルフオン酸塩、ジアルキルスルホコハ
ク酸塩、アルキル硫酸エステル塩、高級アルコー
ル硫酸エステル塩等の陰イオン性界面活性剤を挙
げることが出来、またそれらの２種以上を併用し
て用いることもできる。
界面活性剤ｂの使用量は吸水ポリマーａに対し
て0.01〜10wt％、好ましくは0.05〜5wt％、より
好ましくは0.1〜2wt％である。界面活性剤ｂの使
用量が0.01wt％未満の場合には得られた吸水性組
成物の塩類溶液又は血液に対する吸収速度が遅
く、効果が発現されない。使用量が2wt％以上で
は、効果は変らず、界面活性剤の種類にも依るが
10wt％を超えると得られた吸水性組成物の粉末
特性が著しく悪くなる。経済性と粉末特性の面か
らは５％以下が好ましく、より好ましくは２％以
下といえるが、使用目的に応じ適当に選ばれる。
本発明の実施にあたつて、吸水ポリマーａを界
面活性剤ｂで処理する方法としては吸水ポリマ
ーａに界面活性剤ｂ又は所定の界面活性剤溶液
（例えば水溶液、アルコール溶液等）を噴霧する
方法。吸水ポリマーａを膨潤させない溶媒中に
ポリマーａと界面活性剤ｂとをスラリーにして処
理する方法等いかなる方法であつても良く、その
処理方法は問わない。次に界面活性剤で処理した
サンプルは乾燥して最終の吸水性組成物をつく
る。
本発明がより効果的にその機能を発現するため
には、使用される吸水ポリマーの粒径が0.01〜５
mm、好ましくは0.05〜１mmであることが望まし
い。粒径が0.01mm以下であると界面活性剤と組み
合せることにより著しく粉体特性が悪くなり好ま
しくない。又粒径が５mm以上になると界面活性剤
との均一処理が困難であるし、又吸水ポリマーの
表面積が著しく小さくなりその結果、吸水速度が
遅くなり好ましくない。なお吸水ポリマーの形状
は球状、粉末状、鱗片状、繊維状、多孔質状等い
ずれのものでも良い。
本発明により塩類溶液又は血液に対する吸収速
度の優れた吸水性組成物を得ることができ、従来
からの農業用保水剤又は油と水との混合物から一
瞬に水を除去する脱水剤等の分野の他に衛生用品
の材料として用いることが可能となつた。即ち一
度に大量の尿を吸収しなくてはいけない紙オシメ
の分野及び血液を吸収しなくてはいけない女性用
生理ナプキンの分野に用いることができ、“も
れ”や“不快感”を残すことがなくなることを可
能にした。
以下、実施例及び比較例によつて本発明を具体
的に説明するが、本発明はこれら実施例に限定さ
れるものではない。
尚、以下の試験例における吸水速度はポリマー
0.5ｇが10分間に吸収した生理食塩水又は疑似血
液の量でもつて表わした。但し疑似血液の組成
は、グリセリン30wt％、食塩0.9wt％、エマルゲ
ン935（花王アトラス社製、ポリオキシエチレン
（35）ノニルフエノールエーテル）0.0025wt％、
赤色２号0.01wt％、イオン交換水バランスであ
る。
又、以下の実施例及び比較例に用いた吸水ポリ
マーは次の通りである。
吸水ポリマーＡ
２−四つ口丸底フラスコにシクロヘキサン
1150ml、エチルセルロース（ハーキユリーズ社
製、商標エチルセルロースＮ−22、エトキシ基
47.5〜49wt％）3.64ｇを仕込み、溶存酸素を追い
出し75℃まで昇温した。別にフラスコ中にアクリ
ル酸150ｇを、外部より冷却しつつイオン交換水
200ｇに溶解した65.8ｇの98％苛性ソーダで中和
した。ついで過硫酸カリウム0.5ｇとＮ・N′−メ
チレンビスアクリルアミド0.15ｇを溶解し、モノ
マー溶液をつくり、これを前記四つ口丸底フラス
コに添加し75℃で重合した。続いてシクロヘキサ
ンを取り除き、更に膨潤ゲルを80〜150℃で減圧
乾燥したサンプルを吸水ポリマーＡとした。
吸水ポリマーＢ
三洋化成株式会社製“サンウエツトIM−300”
……デンプン−アクリル酸グラフト共重合体の中
和物を吸水ポリマーＢとした。
吸水ポリマーＣ
住友化学工業株式会社製“スミカゲルＳ−50”
……アクリル酸メチル／酢酸ビニル共重体の加水
分解物を吸水ポリマーＣとした。
吸水ポリマーＤ
製鉄化学工業株式会社製“アクアキープ
10SH”……架橋ポリアクリル酸ソーダを吸水ポ
リマーＤとした。
実施例 １
吸水ポリマーA50ｇをフラスコに取り、撹拌下
にペレツクスOT−Ｐ（花王アトラス社製、ジア
ルキルスルホコハク酸ソーダ）0.5ｇをイオン交
換水３ｇに溶解した溶液を噴霧した。その後80〜
100℃で減圧乾燥した。
実施例 ２
吸水ポリマーA50ｇをフラスコに取りヘキサン
100mlを加えてスラリー状態とした。これにポリ
オキシエチレンラウリルエーテル（EO付加モル
数平均35）0.75ｇを添加し40〜50℃で30分間保持
した。ヘキサンを除去した後、80〜100℃で減圧
乾燥した。
実施例 ３
吸水ポリマーB50ｇをフラスコに取り、エタノ
ール100mlを加えてスラリー状態とした。これに
ポリオキシエチレン（30モル）ノニルフエノール
エーテル0.15ｇを添加し、30分間撹拌した後、エ
タノールを除去し80〜100℃で減圧乾燥した。
実施例 ４
吸水ポリマーC50ｇをフラスコに取り、エタノ
ール100mlを加えてスラリー状態とした。これに
ポリオキシエチレン（20モル）ステアリルエーテ
ル0.3ｇを添加し、30分間撹拌した後エタノール
を除去し、80〜100℃で減圧乾燥した。
実施例 ５
吸水ポリマーＤを50ｇをフラスコに取り、撹拌
下にTween40（花王アトラス社製、ポリオキシ
エチレンソルビタンモノパルミテート）1.0ｇを
エタノール10mlに溶解した溶液を噴霧した。その
後80〜100℃で乾燥した。
比較例 １〜４
界面活性剤を含まないサンプル吸水ポリマーＡ
〜Ｄをそれぞれ比較例１〜４とした。
比較例 ５〜６
界面活性剤としてそれぞれコータミンＤ−86P
（花王アトラス社製、ジステアリルジメチルアン
モニウムクロライド）0.5ｇ及び５ｇを10mlのメ
タノールに溶解して使う以外は実施例１と同様の
操作を行つた。
比較例 ７
界面活性剤としてコータミンＤ−86P0.5ｇを10
mlのメタノールに溶解して使う以外は実施例５と
同様の操作を行つた。
試験例 １
実施例１〜５、及び比較例１〜７で得られた吸
水性組成物について、吸収速度を調べた。結果を
表１に示す。
The present invention relates to water absorbent compositions. More specifically, the present invention relates to a water-absorbing composition that is highly water-absorbent and has excellent absorption properties for saline solutions and blood. Conventionally, paper, pulp, sponge, etc. have been used as absorbent or water-retaining materials in sanitary materials such as sanitary napkins and paper diapers, and in the agricultural field. However, if pressure is applied, a large portion of it will be squeezed out. As alternatives to these materials, several water-absorbing materials have been proposed in recent years, such as hydrolysates of starch-acrylonitrile graft polymers, modified cellulose ethers, and hydrolysates of methyl acrylate/vinyl acetate copolymers, and improvements have also been made. It has been done. However, although all of them exhibit excellent absorbency for water, it is difficult to say that they exhibit excellent absorbency for saline solutions or blood, and a satisfactory water-absorbing material has not been obtained. As a result of intensive research to improve the above drawbacks, the present inventor solved the above drawbacks by combining a water-absorbing polymer a with an anionic surfactant and/or a nonionic surfactant b with an HLB of 7 or higher. It was discovered that a water-absorbing material can be obtained, and the present invention was completed. That is, the present invention provides a water-absorbing composition comprising a water-absorbing polymer a and an anionic surfactant and/or a nonionic surfactant b having an HLB of 7 or more in an amount of 0.01 to 10% by weight based on the polymer. It is something to do. The water-absorbing polymer of the present invention is one that does not dissolve in water and swells in water by absorbing several hundred times its own weight in water to form a hydrogel.
Hydrolyzate of acrylonitrile graft copolymer, neutralized starch-acrylic acid graft polymer, crosslinked carboxymethyl cellulose, hydrolyzate of methyl acrylate/vinyl acetate copolymer, crosslinked polyacrylate, crosslinked polyvinyl alcohol Examples include metamorphosed products. Examples of the above-mentioned water-absorbing polymers include, for example, the hydrolyzate of starch-acrylic nitrile graft copolymer is disclosed in Japanese Patent Publication No. 49-43395, and the neutralized product of starch-acrylic acid graft polymer is disclosed in Japanese Patent Publication No. 53-46199, Japanese Patent Publication No. 55 -21041 publication, the hydrolyzate of methyl acrylate/vinyl acetate copolymer is published in Japanese Patent Publication No. 13495, 1983,
-19243 publication, cross-linked polyvinyl alcohol modified product is disclosed in JP-A-54-20093, JP-A-54-143496
No. 1, cross-linked polyacrylate is published in Japanese Unexamined Patent Publication No. 1983-
It can be manufactured by the method disclosed in JP-A-112787 and JP-A-55-84304, or it can be purchased as it is commercially available. A method for improving water dispersibility by combining a water-absorbing polymer and a surfactant has already been reported in JP-A-Sho.
It is disclosed in Japanese Patent No. 54-76652. This method combines a starch-acrylonitrile graft copolymer hydrolyzate and a cationic surfactant. However, this method has the disadvantage that it requires a large amount of surfactant in order to obtain a product with excellent dispersibility because it combines an anion and a cation. It also has the disadvantage of significantly poor fluidity. Furthermore, when viewed as a water-absorbing material, its performance is not fully satisfactory. Anionic surfactants used in the present invention and
Examples of nonionic surfactants with an HLB of 7 or higher include polyoxyethylene alkyl ether, polyoxyethylene alkyl phenol ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene fatty acid ester, and polyoxyethylene oxypropylene block polymer. Examples include anionic surfactants such as ionic surfactants, fatty acid salts, alkylnaphthalene sulfonates, dialkyl sulfosuccinates, alkyl sulfate ester salts, and higher alcohol sulfate ester salts, and two types thereof. The above can also be used in combination. The amount of surfactant b used is 0.01 to 10 wt%, preferably 0.05 to 5 wt%, more preferably 0.1 to 2 wt%, based on the water absorbing polymer a. When the amount of surfactant b used is less than 0.01 wt%, the absorption rate of the resulting water-absorbing composition into a salt solution or blood is slow, and no effect is exhibited. If the amount used is 2wt% or more, the effect will not change, although it depends on the type of surfactant.
If it exceeds 10 wt%, the powder properties of the resulting water absorbent composition will be significantly deteriorated. From the viewpoint of economy and powder properties, the content is preferably 5% or less, more preferably 2% or less, but it is appropriately selected depending on the purpose of use. In carrying out the present invention, a method for treating water-absorbing polymer a with surfactant b is a method of spraying surfactant b or a predetermined surfactant solution (for example, an aqueous solution, an alcohol solution, etc.) onto water-absorbing polymer a. . Any method may be used, such as a method in which polymer a and surfactant b are made into a slurry in a solvent that does not swell water-absorbing polymer a, and the treatment method is not limited. The surfactant treated sample is then dried to form the final absorbent composition. In order for the present invention to more effectively express its functions, the particle size of the water-absorbing polymer used must be 0.01 to 5.
mm, preferably 0.05 to 1 mm. If the particle size is less than 0.01 mm, the powder properties will deteriorate significantly when combined with a surfactant, which is not preferable. If the particle size exceeds 5 mm, it is difficult to uniformly treat the particles with a surfactant, and the surface area of the water-absorbing polymer becomes extremely small, resulting in a slow water absorption rate, which is not preferable. The shape of the water-absorbing polymer may be spherical, powder, scale, fibrous, porous, or the like. According to the present invention, it is possible to obtain a water-absorbing composition with excellent absorption speed for saline solution or blood, and it can be used in the field of conventional agricultural water retention agents or dehydrating agents that instantly remove water from mixtures of oil and water. It has also become possible to use it as a material for sanitary products. In other words, it can be used in the field of paper diapers, which must absorb a large amount of urine at once, and in the field of women's sanitary napkins, which must absorb blood, without causing "leakage" or "discomfort." made it possible to disappear. EXAMPLES The present invention will be specifically described below with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples. In addition, the water absorption rate in the following test examples is based on the polymer
It was also expressed as the amount of physiological saline or simulated blood absorbed in 10 minutes by 0.5 g. However, the composition of the simulated blood is 30wt% glycerin, 0.9wt% salt, 0.0025wt% Emulgen 935 (manufactured by Kao Atlas Co., Ltd., polyoxyethylene (35) nonylphenol ether),
Red No. 2 0.01wt%, ion exchange water balance. In addition, the water-absorbing polymers used in the following Examples and Comparative Examples are as follows. Water-absorbing polymer A 2-Cyclohexane in a four-neck round bottom flask
1150ml, ethyl cellulose (manufactured by Hercules Co., Ltd., trademark ethyl cellulose N-22, ethoxy group
47.5-49wt%) was charged, dissolved oxygen was expelled, and the temperature was raised to 75°C. Separately, add 150 g of acrylic acid to a flask with ion-exchanged water while cooling from the outside.
Neutralized with 65.8 g of 98% caustic soda dissolved in 200 g. Next, 0.5 g of potassium persulfate and 0.15 g of N.N'-methylenebisacrylamide were dissolved to prepare a monomer solution, which was added to the four-neck round bottom flask and polymerized at 75°C. Subsequently, cyclohexane was removed, and the swollen gel was further dried under reduced pressure at 80 to 150°C, and the sample was designated as water-absorbing polymer A. Water-absorbing polymer B “Sunwet IM-300” manufactured by Sanyo Chemical Co., Ltd.
... A neutralized product of starch-acrylic acid graft copolymer was designated as water-absorbing polymer B. Water-absorbing polymer C “Sumikagel S-50” manufactured by Sumitomo Chemical Co., Ltd.
...A hydrolyzate of methyl acrylate/vinyl acetate copolymer was used as water-absorbing polymer C. Water-absorbing polymer D “Aqua Keep” manufactured by Tetsuto Kagaku Kogyo Co., Ltd.
10SH”...Cross-linked sodium polyacrylate was used as water-absorbing polymer D. Example 1 50 g of water-absorbing polymer A was placed in a flask, and 0.5 g of Perex OT-P (manufactured by Kao Atlas Co., Ltd., sodium dialkyl sulfosuccinate) was ion-exchanged with stirring. A solution dissolved in 3 g of water was sprayed.Then 80~
It was dried under reduced pressure at 100°C. Example 2 Take 50g of water-absorbing polymer A in a flask and add hexane.
100ml was added to form a slurry. To this was added 0.75 g of polyoxyethylene lauryl ether (average number of moles of EO added: 35) and held at 40 to 50°C for 30 minutes. After removing hexane, it was dried under reduced pressure at 80-100°C. Example 3 50 g of water-absorbing polymer B was placed in a flask and 100 ml of ethanol was added to form a slurry. After adding 0.15 g of polyoxyethylene (30 mol) nonylphenol ether to this and stirring for 30 minutes, ethanol was removed and the mixture was dried under reduced pressure at 80 to 100°C. Example 4 50 g of water-absorbing polymer C was placed in a flask, and 100 ml of ethanol was added to form a slurry. To this was added 0.3 g of polyoxyethylene (20 mol) stearyl ether, and after stirring for 30 minutes, ethanol was removed and the mixture was dried under reduced pressure at 80 to 100°C. Example 5 50 g of water-absorbing polymer D was placed in a flask, and a solution of 1.0 g of Tween 40 (manufactured by Kao Atlas Co., Ltd., polyoxyethylene sorbitan monopalmitate) dissolved in 10 ml of ethanol was sprayed onto the flask while stirring. It was then dried at 80-100°C. Comparative Examples 1 to 4 Sample water-absorbing polymer A without surfactant
~D were designated as Comparative Examples 1 to 4, respectively. Comparative Examples 5-6 Cortamine D-86P as surfactant
The same procedure as in Example 1 was performed except that 0.5 g and 5 g of distearyl dimethyl ammonium chloride (manufactured by Kao Atlas Co., Ltd.) were used after being dissolved in 10 ml of methanol. Comparative Example 7 0.5g of Cortamine D-86P as a surfactant
The same procedure as in Example 5 was carried out except that the solution was dissolved in 1 ml of methanol. Test Example 1 The absorption rate of the water absorbent compositions obtained in Examples 1 to 5 and Comparative Examples 1 to 7 was investigated. The results are shown in Table 1.
【表】【table】
【表】【table】
Claims (1)
体の加水分解物、デンプン−アクリル酸グラフト
重合体の中和物、架橋カルボキシメチルセルロー
ス、アクリル酸メチル／酢酸ビニル共重合体の加
水分解物、架橋ポリアクリル酸塩、架橋ポリビニ
ルアルコール変性物より成る群から選ばれる吸水
ポリマーａと、該ポリマーに対して0.01〜10重量
パーセントの陰イオン性界面活性剤及び／又は
HLB7以上の非イオン性界面活性剤ｂとからなる
吸水性組成物。1 Hydrolyzate of starch-acrylic nitrile graft copolymer, neutralized starch-acrylic acid graft polymer, crosslinked carboxymethyl cellulose, hydrolyzate of methyl acrylate/vinyl acetate copolymer, crosslinked polyacrylate, a water-absorbing polymer a selected from the group consisting of cross-linked polyvinyl alcohol modified products; an anionic surfactant and/or 0.01 to 10% by weight of the polymer;
A water-absorbing composition comprising a nonionic surfactant b with an HLB of 7 or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56130669A JPS5832641A (en) | 1981-08-20 | 1981-08-20 | Water-absorbing composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56130669A JPS5832641A (en) | 1981-08-20 | 1981-08-20 | Water-absorbing composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5832641A JPS5832641A (en) | 1983-02-25 |
| JPS6223985B2 true JPS6223985B2 (en) | 1987-05-26 |
Family
ID=15039778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56130669A Granted JPS5832641A (en) | 1981-08-20 | 1981-08-20 | Water-absorbing composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5832641A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2509087B2 (en) * | 1984-08-11 | 1996-06-19 | 三洋化成工業株式会社 | Water absorbent resin, manufacturing method and water absorbent, water retention agent |
| US4742086A (en) * | 1985-11-02 | 1988-05-03 | Lion Corporation | Process for manufacturing porous polymer |
| GB9107952D0 (en) * | 1991-04-15 | 1991-05-29 | Dow Rheinmuenster | Surface crosslinked and surfactant coated absorbent resin particles and method of preparation |
| WO1997014498A1 (en) * | 1995-10-20 | 1997-04-24 | Nippon Shokubai Co., Ltd. | Adsorbent and method for adsorbing surfactant and carrier for surfactant |
| JP2004001373A (en) * | 2002-12-24 | 2004-01-08 | Daiki:Kk | Absorber and sheet which uses the absorber |
| WO2005042042A1 (en) * | 2003-10-31 | 2005-05-12 | Basf Aktiengesellschaft | Blood- and/or body fluid-absorbing polymer particles |
| JP5596526B2 (en) * | 2010-12-14 | 2014-09-24 | 花王株式会社 | Composition for water absorption modification of water absorbent resin particles |
| US10729600B2 (en) | 2015-06-30 | 2020-08-04 | The Procter & Gamble Company | Absorbent structure |
| EP3370673B1 (en) * | 2015-11-04 | 2022-03-30 | The Procter & Gamble Company | Absorbent structure |
| RU2697170C1 (en) | 2015-11-04 | 2019-08-12 | Дзе Проктер Энд Гэмбл Компани | Absorbent structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5470694A (en) * | 1977-10-18 | 1979-06-06 | Unilever Nv | Absorptive material and method of fabricating same |
| JPS5476652A (en) * | 1977-11-23 | 1979-06-19 | Gen Mills Chem Inc | Dispersable starch graft copolymer blend |
| JPS5483987A (en) * | 1977-12-15 | 1979-07-04 | Nat Starch Chem Corp | Preparation of graft copolymer |
| JPS5550355A (en) * | 1978-10-05 | 1980-04-12 | Unilever Nv | Absorbing material |
| JPS5684632A (en) * | 1979-12-11 | 1981-07-10 | Nippon Shokubai Kagaku Kogyo Co Ltd | Absorbent |
| JPS5691837A (en) * | 1979-12-27 | 1981-07-25 | Nippon Shokubai Kagaku Kogyo Co Ltd | Absorbing agent |
| JPS56131608A (en) * | 1980-03-19 | 1981-10-15 | Seitetsu Kagaku Co Ltd | Production of acrylic acid polymer having excellent absorptive capacity for saline water |
-
1981
- 1981-08-20 JP JP56130669A patent/JPS5832641A/en active Granted
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5470694A (en) * | 1977-10-18 | 1979-06-06 | Unilever Nv | Absorptive material and method of fabricating same |
| JPS5476652A (en) * | 1977-11-23 | 1979-06-19 | Gen Mills Chem Inc | Dispersable starch graft copolymer blend |
| JPS5483987A (en) * | 1977-12-15 | 1979-07-04 | Nat Starch Chem Corp | Preparation of graft copolymer |
| JPS5550355A (en) * | 1978-10-05 | 1980-04-12 | Unilever Nv | Absorbing material |
| JPS5684632A (en) * | 1979-12-11 | 1981-07-10 | Nippon Shokubai Kagaku Kogyo Co Ltd | Absorbent |
| JPS5691837A (en) * | 1979-12-27 | 1981-07-25 | Nippon Shokubai Kagaku Kogyo Co Ltd | Absorbing agent |
| JPS56131608A (en) * | 1980-03-19 | 1981-10-15 | Seitetsu Kagaku Co Ltd | Production of acrylic acid polymer having excellent absorptive capacity for saline water |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5832641A (en) | 1983-02-25 |
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