JPH0258103B2 - - Google Patents
Info
- Publication number
- JPH0258103B2 JPH0258103B2 JP6310581A JP6310581A JPH0258103B2 JP H0258103 B2 JPH0258103 B2 JP H0258103B2 JP 6310581 A JP6310581 A JP 6310581A JP 6310581 A JP6310581 A JP 6310581A JP H0258103 B2 JPH0258103 B2 JP H0258103B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- absorbing
- absorbing polymer
- weight
- binder
- 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 45
- 239000011230 binding agent Substances 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 14
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 10
- 239000001993 wax Substances 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 4
- 239000003960 organic solvent Substances 0.000 claims description 4
- 229920001169 thermoplastic Polymers 0.000 claims description 3
- 239000004416 thermosoftening plastic Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 32
- 239000000499 gel Substances 0.000 description 13
- -1 β-starch and agar Natural products 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 10
- 239000000725 suspension Substances 0.000 description 9
- 229920001577 copolymer Polymers 0.000 description 7
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 6
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 6
- 238000000576 coating method Methods 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 229920000578 graft copolymer Polymers 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000004745 nonwoven fabric Substances 0.000 description 4
- 239000010408 film Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical class CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000003100 immobilizing effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 239000004584 polyacrylic acid Substances 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 229920006122 polyamide resin Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 229920006230 thermoplastic polyester resin Polymers 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- IANQTJSKSUMEQM-UHFFFAOYSA-N 1-benzofuran Chemical compound C1=CC=C2OC=CC2=C1 IANQTJSKSUMEQM-UHFFFAOYSA-N 0.000 description 1
- 229920001817 Agar Polymers 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- LVDRREOUMKACNJ-BKMJKUGQSA-N N-[(2R,3S)-2-(4-chlorophenyl)-1-(1,4-dimethyl-2-oxoquinolin-7-yl)-6-oxopiperidin-3-yl]-2-methylpropane-1-sulfonamide Chemical compound CC(C)CS(=O)(=O)N[C@H]1CCC(=O)N([C@@H]1c1ccc(Cl)cc1)c1ccc2c(C)cc(=O)n(C)c2c1 LVDRREOUMKACNJ-BKMJKUGQSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical class C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 229920002678 cellulose Chemical class 0.000 description 1
- 239000001913 cellulose Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000009503 electrostatic coating Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004200 microcrystalline wax Substances 0.000 description 1
- 235000019808 microcrystalline wax Nutrition 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 239000002984 plastic foam Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000003784 tall oil Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Chemical class 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明は、粉体状又は粒体状の吸水性ポリマー
の利用方法に係る。さらに詳しくは、吸水性ポリ
マーを特定の有機性バインダーを用いて基体に固
定化することによつて、吸水膨潤したゲルが水中
に溶出することのない吸水製品を提供することで
ある。
従来から、吸水性ポリマー粉末を基体に固定す
ることに関しては、機械的に吸水性ポリマー粉末
を紙、不織布等の基体に埋め込む方法が使用され
ている。然るに前記方法にては、吸水性ポリマー
粉末が基体に固定化されていないために、吸水時
に吸水膨潤したゲルが基体から離れて行き、不都
合であつた。さらに又、このような物理的固定法
においては、製品から吸水性ポリマー粉末が脱落
し易く、表面平滑である基体には、適用できない
等の欠点があつた。さらに、又、上記方法の他
に、水または、これに類似するものによる吸水性
ポリマーの固定化方法がある。（USP4156664）
この方法は、吸水性ポリマーを水に投入して吸水
膨潤させて、ゲル状にした後、これを水または低
濃度のエマルジヨン溶液中に微分散させる。この
分散液を基体上に固定する際、吸水性ポリマーの
吸水能力は、一般に自重の数十倍から数百倍にも
達するため、製造時の乾燥効率が非常に悪く、多
量の熱エネルギーを消費する上、長時間の加熱に
より製品の吸水能力の低下や、着色を来たし好ま
しくない。
上記２件の公知例による吸水製品は、いずれも
吸水時の膨潤ゲルを固定させることは出来ず、複
合体構造のように、吸水表面を不織布等の材料で
別途カバーしないかぎり基体からの吸水ゲルの溶
出はさけられなかつた。
この点を改良するための方法について、本発明
者等は有機性バインダーを用いた吸水性ポリマー
の固定方法に関しすでに出願を行なつている。
（特願昭56−005649（特開昭57−119879号公報参
照））
本発明は、この方法に、さらに改良を加えたも
のである。すなわち、吸水性ポリマーの固定に使
用される有機性のバインダーが、分子中にカルボ
ニル基を少なくとも1.0重量％以上含有する有機
溶剤可溶性、かつ、熱可塑性であるところのカル
ボニル基含有高分子化合物とワツクス類からなる
組合わせが吸水ゲルの固定に非常に有効であるこ
とが見出された。
上記バインダーを用いて吸水性ポリマー粉末を
基体に固定させた製品は、水に浸セキした時に、
吸水性ポリマー粉末を覆つている上記バインダー
が水を通過させて内部に存在する吸水性ポリマー
粉末を膨潤させる能力を有するものである。さら
に膨潤ゲルの成長にともなう、ゲル体積の膨張に
対応して、前記バインダー樹脂被膜は薄膜状に伸
びてその面積を広げて行き、最終的には、十分水
で膨潤した吸水性ポリマーがバインダー樹脂の薄
膜で覆われた状態を呈し、吸水が完了する。
本発明の吸水製品は、従来の、単純に吸水性ポ
リマーが固定化された製品と異なり、吸水膨潤し
ても、吸水性ポリマーが基体に固定化されている
ために、脱落しない上、乾燥雰囲気において元の
状態に回復する等の種々のすぐれた特長を呈する
ものである。本発明の製品を、土中埋設シートに
応用すると、極めて効果的である。例えば、農業
用の上記シートは、雨によるゲルの流出がなく、
長期間の使用に耐えることができる。その他、液
体、あるいは気体中の水分除去用に本発明による
吸水製品を使用する場合には、いずれも耐久性が
すぐれ、反復使用が可能である等の特長を与える
ことができる。
なお、本発明に於て、吸水性ポリマーと称する
ものは、β−デンプン、寒天等の天然物、部分架
橋されたポリオキシエチレン、デンプン−ポリア
クリロニトリルグラフト共重合体の加水分解物、
部分的に架橋されたデンプン−ポリアクリル酸グ
ラフト共重合物、および、その親水性塩（例え
ば、アルカリ金属塩、アンモニウム塩、アミン塩
等）、ポリアクリルアミド、ポリビニルピロリド
ン、ポリビニルアルコール、ポリビニルトルエン
スルホン酸塩等の部分架橋反応物の粉末が挙げら
れる。
前記の各種の吸水性ポリマーの中、特に吸水力
および保水力の点から、部分架橋ポリオキシエチ
レン、デンプン−ポリアクリロニトリルグラフト
共重合体の加水分解物、部分架橋デンプン−ポリ
アクリル酸グラフト共重合体およびその親水性塩
が望ましい。
また、本発明に於いて、有機性バインダーとし
て使用されるものは、下記の２種類の必須成分か
らなる混合物である。すなわち、第１の必須成分
とは、分子中にカルボニル基を少なくとも1.0重
量％以上含有する有機溶剤可溶性かつ、熱可塑性
であるところのカルボニル基含有高分子化合物で
あり、また、第２の必須成分としては、ワツクス
類である。第１の必須成分である前記高分子化合
物の例としては、ダイマー酸ベースのポリアミド
樹脂に代表される可溶性ポリアミド樹脂、熱可塑
性ポリエステル樹脂、エチレン−酢酸ビニル共重
合体、変性エチレン−酢酸ビニル共重合体、酢酸
ビニル−クロトン酸共重合体、酢酸ビニル−無水
フタル酸共重合体、酢酸ビニル−ビニルピロリド
ン共重合体、酢酸ビニル−塩化ビニル共重合体、
（メタ）アクリル酸または、および、（メタ）アク
リル酸エステルからなる重合体、または共重合
体、熱可塑性ポリウレタン樹脂、セルローズ誘導
体等から選ばれた１種又は２種以上の混合物があ
る。
また、第２の必須成分としては、ワツクス類が
使用される。前記の高分子化合物が多かれ少なか
れ親水性を有しているのに対し、第２の必須成分
は阻水性を有する。
前記ワツクス類の例としては、ガムロジン、ト
ール油ロジン、ロジングリセリンエステル、水添
ロジン、水添ロジングリセリンエステル、重合ロ
ジン等のロジン類、パラフインワツクス、マイク
ロクリスタリンワツクス、石油樹脂、低分子量ポ
リスチレン、α−オレフシンオリゴマー、ポリブ
テン、低分子量ポリプロピレン、低分子量ポリエ
チレン、キシレン樹脂、クマロン樹脂、ケトン樹
脂、塩素化パラフインワツクス、α−メチルスチ
レン−ビニルトルエン共重合体、ステアリン酸グ
リセライド、アミドワツクス、等がある。
本発明に使用する、有機性バインダーのうち、
カルボニル基含有高分子化合物中のカルボニル基
の含量は、少なくとも1.0重量％以上が好ましく、
これ以下の含量になると、親水性が低く、本発明
による吸水製品が吸水時にゲルを固定する能力を
失なつてしまう。さらに、前記カルボニル基含有
高分子化合物とワツクス類の混合比率は下記の通
りである。
カルボニル基含有高分子化合物 60〜99重量部
ワツクス類 １〜40重量部
上記混合比率は、有機性バインダーの親水性
と、阻水性の程度によつて好適な値が決定され、
ワツクス類が１重量部以下であれば、バインダー
中での阻水部分が機能するに至らず、又、40重量
部以上になると、阻水性が強すぎ、吸水製品が吸
水時に撥水性を呈し、吸水効率の低下をきたす。
本発明の有機性バインダーは、上述したごと
く、親水性と阻水性成分がお互いに影響し合い、
浸水時の水透過性を促進すると同時に、水による
有機性バインダーの軟化が起こり、結果として膨
潤ゲルを包み込むようにバインダー被膜がふくら
んで行く。したがつて有機性バインダーが余り剛
性の強い組合わせである場合には、適当な可塑剤
を選び、常温に於ける伸びを大きくする方が好ま
しい。
次に本発明の吸水性ポリマーの固定方法に関す
る実施の態様を詳細に説明する。まず、前記バイ
ンダー混合物をそれぞれに適合した有機溶剤に溶
解させて、バインダー溶液として使用する。次い
で、吸水性ポリマー粉末とバインダー溶液とを混
合し、バインダー溶液中に吸水性ポリマーが分散
した懸濁液を作る。前記の吸水性ポリマーと有機
性バインダーとの混合比は、吸水性ポリマーを固
定する基体の種類、用途等により種々異なるの
で、特に限定しないが、吸水性ポリマーが１重量
部に対し、有機性バインダーが0.01〜50重量部の
範囲が好ましい。前記懸濁液の製造の際には、要
すれば、ミキシングロール、ボールミル、サンド
ミル、ホモジナイザー等の分散機を使用すること
ができる。
上記のバインダー溶液中に、必要に応じ、防腐
剤、酸化防止剤、紫外線吸収剤、分散安定剤、着
色剤、増量剤等を添加する。
次に前記の懸濁液を、吸水性ポリマーを固定す
る基体に塗装するのであるが、前記の基体として
は、例えば、繊維、布、不織布、紙、木材、金属
および金属箔、プラスチツク、プラスチツクフイ
ルム、プラスチツクフオーム、ガラス、皮革等の
１種、又は、２種以上の複合体が使用できる。
また、懸濁液の塗布方法は、通常使用される塗
布方法、例えば、デイツプ、スプレー、ロールコ
ート、カーテンフローコート、刷毛塗り、ローラ
ー塗り、静電塗装等のうち、基体の種類により適
当のものを選定する。次に懸濁液を塗装した基体
を加熱乾燥炉、加熱ロール、風乾のうち適当な乾
燥工程を経て乾燥せしめる。
以上のようにして得られた吸水性基体、即ち、
製品は前記の懸濁液中の吸水性ポリマーの濃度や
塗布層の厚さを調節することにより希望する吸水
能力や乾燥による復元性を有する製品を作ること
ができる。
次に、本発明の吸水性ポリマーの固定方法の実
施例および比較例を示す。
実施例 １
熱可塑性ポリエステル樹脂“バイロン200”40
部、“バイロン500”60部（いずれも東洋紡績(株)）
およびα−メチルスチレン−ビニルトルエン共重
合体“ピコテツクス100”（エツソ化学(株)）10部を
酢酸エチル257部と混合し、均一に溶解させて、
バインダー溶液を得た。ついで、このバインダー
溶液の中へ、吸水性ポリマー粉末（SGPポリマ
ー、ヘンケル日本(株)）を110ｇかきまぜながら加
え、懸濁液を得た。基体として、ポリエチレンテ
レフタレートフイルム（75μ）を用い、バーコー
ターを使用して前記懸濁液を塗布した。なお、こ
の懸濁液は、使用前に固形分が30％になるよう酢
酸エチルで希釈したものを用いた。ついで、110
℃の加熱炉に３分間を要して乾燥させ、吸水製品
を得た。この様にして得られた吸水製品中の吸水
性ポリマーの含量は、15ｇ／m2であつた。
比較実施例 １
実施例１と同様の方法で、今度はバインダーの
組み合わせを変更させて、下記の吸水製品を製造
した。
The present invention relates to a method of utilizing a powdery or granular water-absorbing polymer. More specifically, the purpose is to provide a water-absorbing product in which a water-absorbing and swollen gel does not dissolve into water by immobilizing a water-absorbing polymer onto a substrate using a specific organic binder. Conventionally, a method of mechanically embedding water-absorbing polymer powder in a substrate such as paper or non-woven fabric has been used to fix water-absorbing polymer powder to a substrate. However, in the above method, since the water-absorbing polymer powder is not immobilized on the substrate, the swollen gel upon absorption of water separates from the substrate, which is inconvenient. Furthermore, such physical fixing methods have the disadvantage that the water-absorbing polymer powder easily falls off from the product and cannot be applied to substrates with smooth surfaces. Furthermore, in addition to the above-mentioned method, there is a method of immobilizing the water-absorbing polymer with water or something similar thereto. (USP4156664)
In this method, a water-absorbing polymer is added to water to absorb water and swell to form a gel, and then finely dispersed in water or a low-concentration emulsion solution. When fixing this dispersion liquid on a substrate, the water absorption capacity of the water-absorbing polymer is generally several tens to hundreds of times its own weight, so the drying efficiency during production is very poor and a large amount of thermal energy is consumed. In addition, prolonged heating causes a decrease in the water absorption capacity of the product and causes discoloration, which is undesirable. In both of the water-absorbing products according to the above two known examples, it is not possible to fix the swelling gel when water is absorbed, and unless the water-absorbing surface is separately covered with a material such as a non-woven fabric, the water-absorbing gel from the base body is removed like a composite structure. elution was unavoidable. As a method for improving this point, the present inventors have already filed an application regarding a method for fixing a water-absorbing polymer using an organic binder.
(Refer to Japanese Patent Application No. 56-005649 (Japanese Unexamined Patent Publication No. 57-119879)) The present invention is a further improvement of this method. In other words, the organic binder used to fix the water-absorbing polymer is a carbonyl group-containing polymer compound containing at least 1.0% by weight of carbonyl groups in the molecule, which is soluble in organic solvents, and is thermoplastic. It has been found that a combination consisting of the following is very effective for fixing water-absorbing gels. Products in which water-absorbing polymer powder is fixed to a substrate using the binder described above, when immersed in water,
The binder covering the water-absorbing polymer powder has the ability to allow water to pass through and swell the water-absorbing polymer powder present inside. Furthermore, as the swollen gel grows, the binder resin coating expands into a thin film and expands its area in response to the expansion of the gel volume. It becomes covered with a thin film, and water absorption is complete. Unlike conventional products in which a water-absorbing polymer is simply immobilized, the water-absorbing product of the present invention does not fall off even when it absorbs water and swells because the water-absorbing polymer is immobilized on the base, and it is also available in a dry atmosphere. It exhibits various excellent features such as being able to recover to its original state. When the product of the present invention is applied to a sheet buried in the soil, it is extremely effective. For example, the above sheet for agricultural use does not cause gel to run out due to rain.
Can withstand long-term use. In addition, when the water-absorbing product according to the present invention is used for removing moisture from liquid or gas, it can provide features such as excellent durability and repeated use. In the present invention, water-absorbing polymers include natural products such as β-starch and agar, partially crosslinked polyoxyethylene, hydrolysates of starch-polyacrylonitrile graft copolymers,
Partially crosslinked starch-polyacrylic acid graft copolymer, and its hydrophilic salts (e.g., alkali metal salts, ammonium salts, amine salts, etc.), polyacrylamide, polyvinylpyrrolidone, polyvinyl alcohol, polyvinyltoluenesulfonic acid Examples include powders of partially crosslinked reactants such as salts. Among the various water-absorbing polymers mentioned above, partially cross-linked polyoxyethylene, hydrolysates of starch-polyacrylonitrile graft copolymers, and partially cross-linked starch-polyacrylic acid graft copolymers are particularly preferred from the viewpoint of water absorbing and water retaining power. and its hydrophilic salts are preferred. Furthermore, in the present invention, the organic binder used is a mixture consisting of the following two types of essential components. That is, the first essential component is a carbonyl group-containing polymer compound that is soluble in organic solvents and thermoplastic and contains at least 1.0% by weight of carbonyl groups in the molecule, and the second essential component is It is waxes. Examples of the polymer compound that is the first essential component include soluble polyamide resins such as dimer acid-based polyamide resins, thermoplastic polyester resins, ethylene-vinyl acetate copolymers, and modified ethylene-vinyl acetate copolymers. vinyl acetate-crotonic acid copolymer, vinyl acetate-phthalic anhydride copolymer, vinyl acetate-vinylpyrrolidone copolymer, vinyl acetate-vinyl chloride copolymer,
There are one type or a mixture of two or more types selected from polymers or copolymers of (meth)acrylic acid or (meth)acrylic acid esters, thermoplastic polyurethane resins, cellulose derivatives, and the like. Furthermore, waxes are used as the second essential component. While the above-mentioned polymer compounds have more or less hydrophilic properties, the second essential component has water-blocking properties. Examples of the waxes include rosins such as gum rosin, tall oil rosin, rosin glycerin ester, hydrogenated rosin, hydrogenated rosin glycerin ester, and polymerized rosin, paraffin wax, microcrystalline wax, petroleum resin, and low molecular weight polystyrene. , α-olefusin oligomer, polybutene, low molecular weight polypropylene, low molecular weight polyethylene, xylene resin, coumaron resin, ketone resin, chlorinated paraffin wax, α-methylstyrene-vinyltoluene copolymer, stearic acid glyceride, amide wax, etc. There is. Among the organic binders used in the present invention,
The content of carbonyl groups in the carbonyl group-containing polymer compound is preferably at least 1.0% by weight,
If the content is less than this, the hydrophilicity will be low and the water-absorbing product according to the invention will lose its ability to fix the gel upon water absorption. Furthermore, the mixing ratio of the carbonyl group-containing polymer compound and waxes is as follows. Carbonyl group-containing polymer compound 60 to 99 parts by weight Waxes 1 to 40 parts by weight The above mixing ratio is determined to a suitable value depending on the hydrophilicity of the organic binder and the degree of water repellency.
If the wax is less than 1 part by weight, the water-blocking part in the binder will not function properly, and if it is more than 40 parts by weight, the water-blocking property will be too strong, and the water-absorbing product will become water-repellent when it absorbs water. This causes a decrease in water absorption efficiency. As mentioned above, in the organic binder of the present invention, the hydrophilic and water-blocking components influence each other,
At the same time as promoting water permeability when immersed in water, water softens the organic binder, and as a result, the binder film swells to envelop the swollen gel. Therefore, if the combination of organic binders is too rigid, it is preferable to select an appropriate plasticizer to increase the elongation at room temperature. Next, embodiments of the method of fixing a water-absorbing polymer of the present invention will be described in detail. First, the binder mixture is dissolved in a suitable organic solvent and used as a binder solution. Next, the water-absorbing polymer powder and the binder solution are mixed to form a suspension in which the water-absorbing polymer is dispersed in the binder solution. The mixing ratio of the water-absorbing polymer and the organic binder is not particularly limited, as it varies depending on the type of substrate to which the water-absorbing polymer is immobilized, the purpose, etc. is preferably in the range of 0.01 to 50 parts by weight. When producing the suspension, if necessary, a dispersing machine such as a mixing roll, ball mill, sand mill, homogenizer, etc. can be used. Preservatives, antioxidants, ultraviolet absorbers, dispersion stabilizers, colorants, extenders, etc. are added to the above binder solution, if necessary. Next, the suspension is applied to a substrate on which the water-absorbing polymer is fixed. Examples of the substrate include fibers, cloth, nonwoven fabrics, paper, wood, metals and metal foils, plastics, and plastic films. , plastic foam, glass, leather, etc., or a composite of two or more of them can be used. The suspension can be applied by any of the commonly used coating methods, such as dip, spray, roll coating, curtain flow coating, brush coating, roller coating, electrostatic coating, etc., depending on the type of substrate. Select. Next, the substrate coated with the suspension is dried through a suitable drying process of a heated drying oven, heated roll, or air drying. The water-absorbing substrate obtained as above, that is,
By adjusting the concentration of the water-absorbing polymer in the suspension and the thickness of the coating layer, it is possible to create a product having the desired water-absorbing ability and recovery properties upon drying. Next, examples and comparative examples of the method of fixing a water-absorbing polymer of the present invention will be shown. Example 1 Thermoplastic polyester resin “Vylon 200” 40
60 copies of “Byron 500” (all by Toyobo Co., Ltd.)
and 10 parts of α-methylstyrene-vinyltoluene copolymer “Picotex 100” (Etsuo Chemical Co., Ltd.) were mixed with 257 parts of ethyl acetate and dissolved uniformly.
A binder solution was obtained. Next, 110 g of water-absorbing polymer powder (SGP Polymer, Henkel Japan Co., Ltd.) was added to this binder solution while stirring to obtain a suspension. A polyethylene terephthalate film (75μ) was used as a substrate, and the suspension was coated using a bar coater. This suspension was diluted with ethyl acetate to have a solid content of 30% before use. Then, 110
It was dried in a heating oven at 0.degree. C. for 3 minutes to obtain a water-absorbing product. The content of water-absorbing polymer in the water-absorbing product thus obtained was 15 g/m 2 . Comparative Example 1 The following water-absorbing product was manufactured in the same manner as in Example 1, this time by changing the combination of binders.
【表】
比較実施例 ２
(1) 従来の粉末散布方法
ボリエステルフイルム（75μ厚）上に吸水性
ポリマー粉末を15ｇ／m2の割合いで散布し、そ
の上に少量の水をスプレーし、ついで薄い不織
布を重ね合わせて圧着した。
(2) 従来の水による膨潤方法
アクリル系エマルジヨンを水で希釈して、固
形分４％とし、これに吸水性ポリマー粉末を
徐々に加えながら急速撹拌して、膨潤ゲルを細
かく砕き、最終的に１％の吸水性ポリマーを含
む液を作る。次に(1)で使用したものと同じフイ
ルムに上記の液を厚さ1.5mmに塗布し、80℃の
熱風乾燥炉で２時間乾燥した。塗布された吸水
性ポリマー量は15ｇ／m2であつた。
試験方法
(A) 吸水効率
試料を水中に浸漬し、吸水量が平衝に達した
時の値、吸水性ポリマー１ｇ当りの吸水量
（ｇ）で表わす。
(B) 膨潤ゲルの保持率
10×10cmの試料を垂直状態で水中に浸漬し２
時間後、吸水が終了した時のW0と、48時間後
の重量Ｗとの重量変化Ｗ／W0×100（％）。
(C) 製品の可撓性
(D) 製品のヒートシール性
上記の比較試験結果は表１および表２の通りで
ある。[Table] Comparative Example 2 (1) Conventional powder spraying method Water-absorbing polymer powder was sprinkled on a polyester film (75 μ thick) at a rate of 15 g/m 2 , a small amount of water was sprayed on top of it, and then a small amount of water was sprayed on it. Thin nonwoven fabrics were layered and crimped. (2) Conventional swelling method with water Acrylic emulsion is diluted with water to give a solid content of 4%, water-absorbing polymer powder is gradually added to this and rapidly stirred to break the swollen gel into fine pieces. Prepare a liquid containing 1% water-absorbing polymer. Next, the above liquid was applied to the same film used in (1) to a thickness of 1.5 mm and dried in a hot air drying oven at 80°C for 2 hours. The amount of water-absorbing polymer applied was 15 g/m 2 . Test method (A) Water absorption efficiency The value obtained when the sample is immersed in water and the water absorption reaches equilibrium, expressed as the water absorption (g) per 1 g of water-absorbing polymer. (B) Retention rate of swollen gel A 10 x 10 cm sample was immersed vertically in water.
Weight change W/W 0 ×100 (%) between W 0 at the end of water absorption after time and weight W after 48 hours. (C) Flexibility of the product (D) Heat sealability of the product The results of the above comparative tests are shown in Tables 1 and 2.
【表】【table】
Claims (1)
用いて基体に固定化する際に、上記バインダーが (1) 分子中に、カルボニル基を少なくとも1.0重
量％以上含有する有機溶剤可溶性かつ、熱可塑
性であるところの、カルボニル基含有高分子化
合物 60〜99重量部 (2) ワツクス類 １〜40重量部 を、必須成分とする混合物からなることを特徴と
する、吸水性ポリマーの固定方法。[Scope of Claims] 1. When a water-absorbing polymer powder is immobilized on a substrate using an organic binder, the binder is (1) soluble in an organic solvent and contains at least 1.0% by weight of carbonyl groups in its molecules; Fixation of a water-absorbing polymer, characterized in that it consists of a mixture containing as essential components 60 to 99 parts by weight of a carbonyl group-containing polymer compound (2) and 1 to 40 parts by weight of waxes, which are thermoplastic. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6310581A JPS57178746A (en) | 1981-04-24 | 1981-04-24 | Method of fixing water absorbing polymer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6310581A JPS57178746A (en) | 1981-04-24 | 1981-04-24 | Method of fixing water absorbing polymer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57178746A JPS57178746A (en) | 1982-11-04 |
| JPH0258103B2 true JPH0258103B2 (en) | 1990-12-06 |
Family
ID=13219675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6310581A Granted JPS57178746A (en) | 1981-04-24 | 1981-04-24 | Method of fixing water absorbing polymer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57178746A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6173767A (en) * | 1984-09-19 | 1986-04-15 | Sumitomo Chem Co Ltd | Production of water-absorbing material |
| FR2575110B1 (en) * | 1984-12-21 | 1987-10-16 | Intissel Sa | WATERPROOFING COMPOSITE MATERIAL, ITS PREPARATION AND COMPOSITION FOR USE THEREOF, AS WELL AS ITS USES |
| JPH0231878U (en) * | 1988-08-19 | 1990-02-28 | ||
| US5350617A (en) * | 1991-02-08 | 1994-09-27 | Noriaki Fujisawa | Water shieldable material and cable using the same |
| JP3323232B2 (en) * | 1992-05-23 | 2002-09-09 | 住友精化株式会社 | Composite composition of superabsorbent resin particles |
-
1981
- 1981-04-24 JP JP6310581A patent/JPS57178746A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57178746A (en) | 1982-11-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1222114A (en) | Polyester film primed with crosslinked acrylic polymers | |
| JP3917178B2 (en) | Substrate having superabsorbent material, method for producing the same and use thereof | |
| US5919831A (en) | Process for making an ion exchange material | |
| CA1191294A (en) | Adhesives for prepasted wallcoverings | |
| JPS6221379B2 (en) | ||
| JPH06507452A (en) | fiber or filament | |
| JPH0258103B2 (en) | ||
| JPS628464B2 (en) | ||
| WO2001021881A2 (en) | Hydrophobic biodegradable cellulose containing composite materials | |
| JPH06508792A (en) | Products for separation and purification and methods for adjusting their porosity | |
| US4639395A (en) | Prepasted wallcoverings | |
| JPH02280833A (en) | Compounding and separating agent and its preparation | |
| US6013325A (en) | Printable one-component swelling paste and the use thereof | |
| JPH0135841B2 (en) | ||
| JPS60110440A (en) | Non-air-permeable hygroscopic and moisture-dissipating waterproof sheet | |
| JPS5864133A (en) | Preparation of adsorbing and desorbing body | |
| JPH0647789B2 (en) | Humidity control wallpaper | |
| JP4582288B2 (en) | Moisture absorption and desorption material | |
| JPH0373798B2 (en) | ||
| JP4059561B2 (en) | Laminated body | |
| JP3007104B2 (en) | Dew condensation prevention sheet and its manufacturing method | |
| JPS60259896A (en) | Total heat exchange element | |
| JPH0651772B2 (en) | Water-swellable resin composition | |
| JP3895815B2 (en) | Method for producing adhesive sheets | |
| JP2882633B2 (en) | Method for producing water-swellable polymer composition |