JPH08100010A - Temperature-sensitive water-absorbing and releasing composition - Google Patents
Temperature-sensitive water-absorbing and releasing compositionInfo
- Publication number
- JPH08100010A JPH08100010A JP6257349A JP25734994A JPH08100010A JP H08100010 A JPH08100010 A JP H08100010A JP 6257349 A JP6257349 A JP 6257349A JP 25734994 A JP25734994 A JP 25734994A JP H08100010 A JPH08100010 A JP H08100010A
- Authority
- JP
- Japan
- Prior art keywords
- water
- temperature
- polymer
- sensitive
- water absorption
- 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.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000010521 absorption reaction Methods 0.000 claims abstract description 31
- 229920000642 polymer Polymers 0.000 claims abstract description 15
- 239000010954 inorganic particle Substances 0.000 claims abstract description 14
- QNILTEGFHQSKFF-UHFFFAOYSA-N n-propan-2-ylprop-2-enamide Chemical compound CC(C)NC(=O)C=C QNILTEGFHQSKFF-UHFFFAOYSA-N 0.000 claims abstract description 7
- OMNKZBIFPJNNIO-UHFFFAOYSA-N n-(2-methyl-4-oxopentan-2-yl)prop-2-enamide Chemical compound CC(=O)CC(C)(C)NC(=O)C=C OMNKZBIFPJNNIO-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000002253 acid Substances 0.000 claims abstract description 4
- 239000004927 clay Substances 0.000 claims abstract description 4
- 239000005909 Kieselgur Substances 0.000 claims abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 6
- 239000002250 absorbent Substances 0.000 claims description 6
- 239000011557 critical solution Substances 0.000 claims description 6
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 4
- 230000002441 reversible effect Effects 0.000 claims description 4
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 230000002745 absorbent Effects 0.000 claims 2
- 239000000178 monomer Substances 0.000 abstract description 15
- 238000004132 cross linking Methods 0.000 abstract description 9
- 239000002689 soil Substances 0.000 abstract description 4
- 239000002904 solvent Substances 0.000 abstract description 4
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000003054 catalyst Substances 0.000 abstract description 2
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 abstract description 2
- 229920002126 Acrylic acid copolymer Polymers 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 13
- 239000000499 gel Substances 0.000 description 8
- 238000006116 polymerization reaction Methods 0.000 description 7
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical group C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 5
- 239000003999 initiator Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- -1 N, N- Methylene Chemical group 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 2
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 2
- XWGJFPHUCFXLBL-UHFFFAOYSA-M rongalite Chemical compound [Na+].OCS([O-])=O XWGJFPHUCFXLBL-UHFFFAOYSA-M 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- FRIBMENBGGCKPD-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)prop-2-enal Chemical compound COC1=CC=CC(C=CC=O)=C1OC FRIBMENBGGCKPD-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- KWYHDKDOAIKMQN-UHFFFAOYSA-N N,N,N',N'-tetramethylethylenediamine Chemical compound CN(C)CCN(C)C KWYHDKDOAIKMQN-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- RXKUYBRRTKRGME-UHFFFAOYSA-N butanimidamide Chemical compound CCCC(N)=N RXKUYBRRTKRGME-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000003898 horticulture Methods 0.000 description 1
- 150000002432 hydroperoxides Chemical class 0.000 description 1
- 229960001545 hydrotalcite Drugs 0.000 description 1
- 229910001701 hydrotalcite Inorganic materials 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QYZFTMMPKCOTAN-UHFFFAOYSA-N n-[2-(2-hydroxyethylamino)ethyl]-2-[[1-[2-(2-hydroxyethylamino)ethylamino]-2-methyl-1-oxopropan-2-yl]diazenyl]-2-methylpropanamide Chemical compound OCCNCCNC(=O)C(C)(C)N=NC(C)(C)C(=O)NCCNCCO QYZFTMMPKCOTAN-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 229920002432 poly(vinyl methyl ether) polymer Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 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
- 230000005855 radiation Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Landscapes
- Polymerisation Methods In General (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、吸排水速度の改善され
た、水中において温度変化に対して鋭敏かつ可逆的な吸
排水能を有する感温吸排水性組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature-sensitive water-absorbing and draining composition which has an improved water-absorbing and draining speed and has water-absorbing and draining ability which is sensitive to water temperature change and reversible in water.
【０００２】[0002]
【従来の技術】従来より、水中において温度変化に対し
て鋭敏かつ可逆的な吸排水能を有するゲルに関して、吸
水特性を改良すべく、種々の方法が提案されてきた。例
えば、ポリビニルメチルエーテル水溶液に酸化鉄を混合
し、これにγ線を照射し、多孔質かつ電熱速度を向上さ
せて吸水速度を向上させる方法（J.Chem.Eng.Japan, 21
10 1988）、ヒドロキシプロピルセルロースをゲル合成
時に予め混合し、重合後ゲルを洗浄しヒドロキシプロピ
ルセルロースを除去してゲルを多孔質化して吸水速度を
向上させる方法（J.Polym.Soc.:PartA, 30 2121 199
2）、体積移転温度以上にて重合し不均一架橋構造を有
するゲルを合成する方法（Polymer Communica-tions, 3
2 322 1991）などが公知である。一方、温度変化に対し
て吸排水能を持たない一般的な高吸水性樹脂に関しても
様々な吸水特性の改良がなされている。例えば、吸水性
樹脂粉末をハイドロタルサイトと混合し吸水速度を向上
させる方法（特開平２−２１５８６３号公報）、吸水性
樹脂粉末とアパジャルタイトを混合し吸水速度を向上さ
せる方法（特開昭６１−５８６５７号公報）等が報告さ
れている。2. Description of the Related Art Conventionally, various methods have been proposed in order to improve the water absorption properties of gels which are sensitive to temperature changes in water and have reversible water absorption and drainage capabilities. For example, a method of mixing iron oxide with an aqueous solution of polyvinyl methyl ether, irradiating it with γ-rays, and improving the porous and electrothermal rate to improve the water absorption rate (J. Chem. Eng. Japan, 21
10 1988), pre-mixing hydroxypropyl cellulose during gel synthesis, washing the gel after polymerization to remove hydroxypropyl cellulose to make the gel porous and improve the water absorption rate (J.Polym.Soc.:PartA, 30 2121 199
2), a method of synthesizing a gel having a heterogeneous cross-linking structure by polymerizing at a temperature above the volume transfer temperature
2 322 1991) and the like are known. On the other hand, various water-absorbing properties have been improved even with respect to a general super-water-absorbent resin that does not have the ability to absorb and drain water with respect to temperature changes. For example, a method of mixing a water-absorbent resin powder with hydrotalcite to improve the water absorption rate (JP-A-2-215863), a method of mixing the water-absorbent resin powder and apajartite to improve the water absorption rate (JP-A-SHO). 61-58657) and the like have been reported.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、これら
方法により吸水速度は改善されるものの、ゲルの製造方
法が非常に煩雑であったり、得られたゲルの吸水倍率が
十分でない等の問題点を有していた。However, although the water absorption rate is improved by these methods, there are problems that the method for producing the gel is very complicated and that the obtained gel has an insufficient water absorption capacity. Was.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、かかる課
題を解決すべく鋭意研究の結果、高い吸水量を有し、か
つ給排水速度の優れた感温吸排水性組成物を見いだし、
本発明を完成するに至った。すなわち本発明は、水中に
おいて下限臨界共溶温度を有しかつ架橋構造を有するポ
リマーを、無機粒子の存在下製造してなる、温度変化に
対し鋭敏かつ可逆的な吸排水能を有する、無機粒子を含
有した感温吸排水性組成物を提供するものである。Means for Solving the Problems As a result of intensive research to solve such problems, the present inventors have found a temperature-sensitive water-absorbing / draining composition having a high water absorption amount and an excellent water supply / drainage rate,
The present invention has been completed. That is, the present invention is a polymer having a lower critical solution temperature in water and having a cross-linking structure, which is produced in the presence of inorganic particles, and has a water absorption and drainage ability that is sensitive and reversible to temperature changes. The present invention provides a temperature-sensitive water-absorbing and draining composition containing
【０００５】本発明に用いられる、水中において下限臨
界共溶温度を有するポリマー（以下、感温性ポリマーと
略称する。）としては、例えば、Ｎ−イソプロピルアク
リルアミド、アクリルアミド及びアクリル酸との共重合
体、あるいはＮ−イソプロピルアクリルアミド、ダイア
セトンアクリルアミド及びアクリル酸との共重合体が例
示される。各モノマーの組成比は任意であるが、Ｎ−イ
ソプロピルアクリルアミドは感温性の点から使用する全
モノマーの３０モル％、好ましくは５０モル％以上が好
ましく、アクリルアミド、ダイアセトンアクリルアミ
ド、アクリル酸はそれぞれ４０モル％以下が望ましい。
感温吸排水性組成物の吸排水開始温度（以下、感温点と
いう。）は、アクリルアミドあるいはダイアセトンアク
リルアミドの使用量により、任意にコントロールするこ
とができる。The polymer having a lower critical solution temperature in water (hereinafter abbreviated as temperature-sensitive polymer) used in the present invention is, for example, a copolymer of N-isopropylacrylamide, acrylamide and acrylic acid. Alternatively, a copolymer with N-isopropyl acrylamide, diacetone acrylamide and acrylic acid is exemplified. The composition ratio of each monomer is arbitrary, but N-isopropylacrylamide is 30 mol%, preferably 50 mol% or more of all the monomers used in terms of temperature sensitivity, and acrylamide, diacetone acrylamide, and acrylic acid are each It is preferably 40 mol% or less.
The water absorption / drainage starting temperature of the temperature-sensitive water absorption / drainage composition (hereinafter referred to as a temperature-sensitive point) can be arbitrarily controlled by the amount of acrylamide or diacetone acrylamide used.
【０００６】水中において下限臨界共溶温度を有しかつ
架橋構造を有するポリマーは、上記感温性ポリマーを製
造する際に、ジビニル型モノマーを共重合する方法、架
橋反応性のあるビニルモノマーを共重合した後、架橋剤
により架橋する方法、あるいは放射線により架橋する方
法等が挙げられるが、無機粒子の均一性、製造方法が簡
便であること等より、ジビニル型モノマーを共重合する
方法が好ましい。使用されるジビニル型モノマーとして
は、感温性ポリマーを構成するの各モノマーと共重合性
がよく、効率よく架橋構造をとり、かつ均一な架橋分布
を与えるものが好ましく、例えば、Ｎ，Ｎ−メチレンビ
ス（メタ）アクリルアミド、エチレングリコールジ（メ
タ）アクリレート、ジエチレングリコール（メタ）アク
リレート、ポリエチレングリコールジ（メタ）アクリレ
ート、プロピレングリコールジ（メタ）アクリレート、
グリセリントリ（メタ）アクリレート等を挙げることが
できる。これらジビニル系モノマーの使用量は、全モノ
マーに対して０．００１〜５ｗｔ％程度、好ましくは
０．０１〜１ｗｔ％程度である。The polymer having a lower critical solution temperature in water and having a cross-linking structure can be obtained by copolymerizing a divinyl type monomer and a vinyl monomer having a cross-linking reactivity during the production of the above temperature-sensitive polymer. Examples of the method include a method of crosslinking with a crosslinking agent after polymerization, a method of crosslinking with radiation, and the like. A method of copolymerizing a divinyl-type monomer is preferable because of the uniformity of the inorganic particles and the simple production method. The divinyl-type monomer used is preferably one that has good copolymerizability with each of the monomers constituting the temperature-sensitive polymer, has an efficient cross-linking structure, and gives a uniform cross-linking distribution. For example, N, N- Methylene bis (meth) acrylamide, ethylene glycol di (meth) acrylate, diethylene glycol (meth) acrylate, polyethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate,
Glycerin tri (meth) acrylate etc. can be mentioned. The amount of these divinyl monomers used is about 0.001 to 5% by weight, preferably about 0.01 to 1% by weight, based on all the monomers.
【０００７】本発明に使用される無機粒子は任意である
が、好ましくは酸性白土、ケイソウ土、カオリンから選
ばれた一種あるいは二種以上が望ましい。これら無機粒
子の使用量は、ポリマー１００重量部に対して、２〜５
０重量部、好ましくは５〜２０重量部添加される。５０
重量部を越えて添加すると、得られた感温吸排水性組成
物の吸水量が低下し、また２重量部未満の場合、吸排水
速度の向上が十分ではない。The inorganic particles used in the present invention are optional, but preferably one or more selected from acid clay, diatomaceous earth and kaolin. The amount of these inorganic particles used is 2 to 5 with respect to 100 parts by weight of the polymer.
0 parts by weight, preferably 5 to 20 parts by weight are added. 50
If it is added in excess of parts by weight, the amount of water absorption of the resulting temperature-sensitive water-absorbing and draining composition decreases, and if it is less than 2 parts by weight, the rate of absorbing and draining water is not sufficiently improved.
【０００８】本発明の組成物は、感温性ポリマーを構成
する各モノマー、必要に応じて添加されるジビニル型モ
ノマーを溶媒に溶解し、該溶液に予め無機粒子を添加し
混合・分散した後、触媒の存在下で重合することにより
実施される。重合後、あるいは重合物を乾燥・粉砕後、
無機粒子を添加・混合すると、無機粒子の均一分散が困
難であったり、無機粒子の脱落等により、十分な吸水速
度の向上は望めない。使用できる溶媒は、モノマーを溶
解するものであれば特に制限されないが、製造効率、安
全上より、水を溶媒として用いることが好ましく、重合
方法は、水溶液重合において用いられる方法は全て使用
できる。用いられる重合開始剤としては、水溶性ラジカ
ル開始剤、例えば、過酸化水素、過硫酸アンモニウムあ
るいは過硫酸カリウム等の過硫酸塩、ｔ−ブチルハイド
ロパーオキシドあるいはクメンハイドロパーオキシド等
のハイドロパーオキシド類、２，２’−アゾビス（２−
アミジノプロパン）二塩酸塩等のアゾ系開始剤、あるい
はこれらの水溶性開始剤と亜硫酸水素ナトリウム、ロン
ガリット、Ｎ，Ｎ，Ｎ’，Ｎ’−テトラメチルエチレン
ジアミン等の還元性物質を組み合わせたレドックス型の
開始剤を挙げることができる。これら開始剤の使用量
は、０．０１〜１０ｗｔ％、好ましくは０．１〜２ｗｔ
％程度である。The composition of the present invention is prepared by dissolving each monomer constituting the temperature-sensitive polymer and, if necessary, a divinyl type monomer, in a solvent, adding inorganic particles to the solution and mixing and dispersing them. , Polymerization in the presence of a catalyst. After polymerization, or after drying and crushing the polymer,
When inorganic particles are added and mixed, it is difficult to uniformly disperse the inorganic particles, or the inorganic particles fall off, so that a sufficient improvement in water absorption rate cannot be expected. The solvent that can be used is not particularly limited as long as it dissolves the monomer, but water is preferably used as the solvent from the viewpoint of production efficiency and safety, and all the methods used in aqueous solution polymerization can be used as the polymerization method. As the polymerization initiator used, a water-soluble radical initiator, for example, hydrogen peroxide, persulfate such as ammonium persulfate or potassium persulfate, hydroperoxides such as t-butyl hydroperoxide or cumene hydroperoxide, 2,2'-azobis (2-
Azo-based initiators such as amidinopropane) dihydrochloride, or redox type in which these water-soluble initiators are combined with reducing substances such as sodium bisulfite, Rongalit, N, N, N ', N'-tetramethylethylenediamine Initiators can be mentioned. The amount of these initiators used is 0.01 to 10 wt%, preferably 0.1 to 2 wt.
%.
【０００９】[0009]
【実施例】以下実施例を挙げて、本発明を詳細に説明す
る。なお、本発明の評価方法は、以下の方法によって測
定した。 （１）吸水速度 感温吸排水性組成物０．２ｇを不織布製袋に封入し、１
０℃に温度調節した純水中に１０分間浸漬した後、十分
に水切りして重量を測定した。別に組成物の入っていな
い不織布製袋を同様に処理し、これをブランクとした。
得られた測定値よりブランクを引き、乾燥組成物１ｇ当
たりの重量に換算した値を吸水速度とした。この値が大
きいほど吸水速度が速い。 （２）排水速度 感温吸排水性組成物０．２ｇを不織布製袋に封入し、１
０℃に温度調節した純水中に１５時間浸漬し、十分に吸
水させた後、５０℃に温度調節した純水中に投入して組
成物から水を排水させ、完全に排水するまでの時間（一
定の重量になるまでの時間）を測定し、この時間を排水
速度とした。この値が小さいほど排水速度が速い。 （３）吸水量 感温吸排水性組成物０．２ｇを不織布製袋に封入し、任
意の温度に調節した純水中に１日間浸漬した後、十分に
水切りして重量を測定した。別に組成物の入っていない
不織布製袋を同様に処理し、これをブランクとした。得
られた測定値よりブランクを引き、乾燥組成物１ｇ当た
りの重量に換算した値を各温度における吸水量とした。
この値が大きいほど高い吸水能を有する。The present invention will be described in detail with reference to the following examples. The evaluation method of the present invention was measured by the following method. (1) Water absorption rate 0.2 g of the temperature-sensitive water absorption / drainage composition was enclosed in a non-woven bag, and 1
After immersing in pure water whose temperature was adjusted to 0 ° C. for 10 minutes, it was thoroughly drained and weighed. Separately, a non-woven bag containing no composition was treated in the same manner and used as a blank.
A blank was subtracted from the obtained measured value, and the value converted into the weight per 1 g of the dry composition was taken as the water absorption rate. The larger this value, the faster the water absorption rate. (2) Drainage rate 0.2 g of the temperature-sensitive water-absorbent / drainage composition is enclosed in a non-woven bag and 1
Immersion in pure water whose temperature is adjusted to 0 ° C. for 15 hours to absorb water sufficiently, and then pouring it into pure water whose temperature is adjusted to 50 ° C. to drain water from the composition until complete drainage (Time until the weight became constant) was measured, and this time was defined as the drainage rate. The smaller this value, the faster the drainage rate. (3) Water absorption amount 0.2 g of the temperature-sensitive water absorption / drainage composition was enclosed in a non-woven bag, immersed in pure water adjusted to an arbitrary temperature for 1 day, drained sufficiently, and the weight was measured. Separately, a non-woven bag containing no composition was treated in the same manner and used as a blank. A blank was subtracted from the obtained measured value, and the value converted into the weight per 1 g of the dry composition was taken as the water absorption amount at each temperature.
The larger this value, the higher the water absorption capacity.
【００１０】実施例１ ５００ｍｌセパラブルフラスコに純水３００ｍｌを投入
し、攪拌下、Ｎ−イソプロピルアクリルアミド２０．４
４ｇ、ダイアセトンアクリルアミド４．９７ｇ、アクリ
ル酸１．０６ｇ、Ｎ，Ｎ’−メチレンビスアクリルアミ
ド０．１４ｇ、酸性白土（日本活性白土（株）製、ニッ
カナイトＳ−２００）２．６６ｇを加え、溶解・分散し
た。窒素ガス気流下、液温度が０℃になるまで冷却した
後、ロンガリット０．０９９ｇ、ｔ−ブチルハイドロパ
ーオキシド０．０８１ｍｌを加え、断熱下重合を行っ
た。重合終了後、フラスコよりゲルを取り出し、１００
℃で乾燥した後、粉砕・分級し、粒子径１５０〜５００
μｍの組成物（粉末）を得た。得られた組成物につい
て、吸水速度、排水速度、吸水量を測定した。結果を、
表１に示す。Example 1 300 ml of pure water was put into a 500 ml separable flask, and N-isopropylacrylamide 20.4 was added with stirring.
4 g, diacetone acrylamide 4.97 g, acrylic acid 1.06 g, N, N'-methylenebisacrylamide 0.14 g, and acid clay (Nippon Activated Soil Co., Ltd., Nikanite S-200) 2.66 g were added, It was dissolved and dispersed. After cooling under a nitrogen gas stream until the liquid temperature reached 0 ° C., 0.099 g of Rongalit and 0.081 ml of t-butyl hydroperoxide were added, and polymerization was carried out under adiabatic conditions. After completion of the polymerization, take out the gel from the flask and
After drying at ℃, pulverize and classify, particle size 150-500
A composition (powder) of μm was obtained. The water absorption rate, drainage rate, and water absorption amount of the obtained composition were measured. The result
It shows in Table 1.
【００１１】実施例２〜９及び比較例１〜２ 表１及び表２に記載したモノマー、無機粒子を用い、実
施例１と同様に処理することにより、組成物を得た。得
られた組成物について同様の評価を行い、結果を表１及
び表２に示した。Examples 2 to 9 and Comparative Examples 1 to 2 Compositions were obtained by treating the monomers and inorganic particles shown in Tables 1 and 2 in the same manner as in Example 1. The same evaluation was performed on the obtained composition, and the results are shown in Tables 1 and 2.
【００１２】[0012]
【表１】 [Table 1]
【００１３】[0013]
【表２】 [Table 2]
【００１４】[0014]
【発明の効果】以上説明してきたように、本発明の感温
吸排水性組成物は、高い吸排水速度と吸水量を有してお
り、紙おむつ等の衛生材料、土壌給水剤や土壌補水剤等
の植物・野菜等の農園芸分野における土壌改善剤、防水
用シーリング材、土のう、温度センサー、ケミカルバル
ブ等、広い範囲に応用できる。As described above, the temperature-sensitive water-absorption / drainage composition of the present invention has a high water-absorption / drainage rate and a high water-absorption amount, and is a sanitary material such as a disposable diaper, a soil water replenisher or a soil water replenisher. It can be applied to a wide range of applications such as soil improvers, waterproofing sealing materials, sandbags, temperature sensors, chemical valves, etc. in the field of agriculture and horticulture such as plants and vegetables.
Claims (4)
つ架橋構造を有するポリマーを、無機粒子存在下製造し
てなる、温度変化に対して可逆的な吸排水能を有する無
機粒子を含有した感温吸排水性組成物。1. A polymer having a lower critical solution temperature in water and having a crosslinked structure in the presence of inorganic particles, the inorganic particles having reversible water absorption and drainage ability with respect to temperature change are contained. A temperature-sensitive water absorbing and draining composition.
オリンから選ばれた一種もしくは二種以上である請求項
１記載の感温吸排水性組成物。2. The temperature-sensitive water absorbent / drainage composition according to claim 1, wherein the inorganic particles are one or more selected from acid clay, diatomaceous earth, and kaolin.
ポリマーが、Ｎ−イソプロピルアクリルアミド、ダイア
セトンアクリルアミド及びアクリル酸からなる共重合体
である請求項１及び２記載の感温吸排水性組成物。3. The temperature-sensitive water-absorbing and draining composition according to claim 1, wherein the polymer having a lower critical solution temperature in water is a copolymer composed of N-isopropylacrylamide, diacetoneacrylamide and acrylic acid.
ポリマーが、Ｎ−イソプロピルアクリルアミド、アクリ
ルアミド及びアクリル酸からなる共重合体である請求項
１及び２記載の感温吸排水性組成物。4. The temperature-sensitive water absorbent / drainage composition according to claim 1, wherein the polymer having a lower critical solution temperature in water is a copolymer composed of N-isopropylacrylamide, acrylamide and acrylic acid.
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25734994A JP3168240B2 (en) | 1994-09-28 | 1994-09-28 | Thermosensitive absorption and drainage composition |
| ES95907867T ES2118563T3 (en) | 1994-02-10 | 1995-02-10 | MIXTURE OF POLYMERS THAT ABSORBS / ABSORBES TEMPERATURE SENSITIVE WATER. |
| PCT/JP1995/000183 WO1995021876A1 (en) | 1994-02-10 | 1995-02-10 | Temperature-sensitive water-absorbing/desorbing polymer composition |
| DE69502354T DE69502354T2 (en) | 1994-02-10 | 1995-02-10 | TEMPERATURE-SENSITIVE WATER-ABSORBING / DESORBING POLYMER COMPOSITION |
| AT95907867T ATE165847T1 (en) | 1994-02-10 | 1995-02-10 | TEMPERATURE SENSITIVE WATER ABSORBING/DESORBING POLYMER COMPOSITION |
| US08/513,883 US5672656A (en) | 1994-02-10 | 1995-02-10 | Temperature sensitive water absorbing and discharging polymer composition |
| EP95907867A EP0693508B1 (en) | 1994-02-10 | 1995-02-10 | Temperature-sensitive water-absorbing/desorbing polymer composition |
| HK98106437A HK1007381A1 (en) | 1994-02-10 | 1995-02-10 | Temperature-sensitive water-absorbing/desorbing polymer composition |
| KR1019950704103A KR100351477B1 (en) | 1994-02-10 | 1995-02-10 | Thermosensitive polymer composition with water absorption and water resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25734994A JP3168240B2 (en) | 1994-09-28 | 1994-09-28 | Thermosensitive absorption and drainage composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08100010A true JPH08100010A (en) | 1996-04-16 |
| JP3168240B2 JP3168240B2 (en) | 2001-05-21 |
Family
ID=17305151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25734994A Expired - Fee Related JP3168240B2 (en) | 1994-02-10 | 1994-09-28 | Thermosensitive absorption and drainage composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3168240B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002294891A (en) * | 2001-04-02 | 2002-10-09 | Takenaka Komuten Co Ltd | Water evaporation cooling roof and wall body structure |
| JP2007217306A (en) * | 2006-02-14 | 2007-08-30 | Takashimashi Nogyo Kyosai Kumiai | Sustained release repellent |
| CN109809425A (en) * | 2019-03-06 | 2019-05-28 | 西南石油大学 | Heat-sensitive self-plugging bentonite based on intelligent film formation, its application and drilling fluid |
| CN115594551A (en) * | 2022-09-28 | 2023-01-13 | 山东农业大学（Cn） | Accurate controlled-release film filled with temperature-sensitive polymer nanoparticles and application thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100396205B1 (en) | 1994-12-22 | 2003-11-28 | 시바 스페셜티 케미칼스 홀딩 인크. | Pyrrolidinone-Containing Solvents |
-
1994
- 1994-09-28 JP JP25734994A patent/JP3168240B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002294891A (en) * | 2001-04-02 | 2002-10-09 | Takenaka Komuten Co Ltd | Water evaporation cooling roof and wall body structure |
| JP2007217306A (en) * | 2006-02-14 | 2007-08-30 | Takashimashi Nogyo Kyosai Kumiai | Sustained release repellent |
| CN109809425A (en) * | 2019-03-06 | 2019-05-28 | 西南石油大学 | Heat-sensitive self-plugging bentonite based on intelligent film formation, its application and drilling fluid |
| CN115594551A (en) * | 2022-09-28 | 2023-01-13 | 山东农业大学（Cn） | Accurate controlled-release film filled with temperature-sensitive polymer nanoparticles and application thereof |
| CN115594551B (en) * | 2022-09-28 | 2023-10-10 | 山东农业大学 | Accurate controlled release membrane material filled with thermosensitive polymer nanoparticles and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3168240B2 (en) | 2001-05-21 |
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