JPH04218586A - Hydrated gel composition for cold-insulating agent and cold-insulating agent containing the hydrated gel composition - Google Patents
Hydrated gel composition for cold-insulating agent and cold-insulating agent containing the hydrated gel compositionInfo
- Publication number
- JPH04218586A JPH04218586A JP3092967A JP9296791A JPH04218586A JP H04218586 A JPH04218586 A JP H04218586A JP 3092967 A JP3092967 A JP 3092967A JP 9296791 A JP9296791 A JP 9296791A JP H04218586 A JPH04218586 A JP H04218586A
- Authority
- JP
- Japan
- Prior art keywords
- water
- freezing point
- cold
- gel composition
- organic solvent
- 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.)
- Pending
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 47
- 238000007710 freezing Methods 0.000 claims abstract description 31
- 230000008014 freezing Effects 0.000 claims abstract description 31
- 239000011347 resin Substances 0.000 claims abstract description 25
- 229920005989 resin Polymers 0.000 claims abstract description 25
- 239000003960 organic solvent Substances 0.000 claims abstract description 19
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 11
- 239000000017 hydrogel Substances 0.000 claims description 32
- 230000000694 effects Effects 0.000 claims description 11
- 239000006185 dispersion Substances 0.000 claims description 10
- 229920001971 elastomer Polymers 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 239000005060 rubber Substances 0.000 claims description 5
- 150000002484 inorganic compounds Chemical class 0.000 claims description 3
- 229910010272 inorganic material Inorganic materials 0.000 claims description 3
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 abstract description 6
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 abstract description 4
- 229920001577 copolymer Polymers 0.000 abstract description 3
- 229920000642 polymer Polymers 0.000 abstract description 3
- 229920002545 silicone oil Polymers 0.000 abstract description 3
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 abstract description 2
- KJDRSWPQXHESDQ-UHFFFAOYSA-N 1,4-dichlorobutane Chemical compound ClCCCCCl KJDRSWPQXHESDQ-UHFFFAOYSA-N 0.000 abstract description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical class CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 abstract description 2
- OEIJHBUUFURJLI-UHFFFAOYSA-N octane-1,8-diol Chemical compound OCCCCCCCCO OEIJHBUUFURJLI-UHFFFAOYSA-N 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 44
- 239000000499 gel Substances 0.000 description 14
- -1 organic acid salts Chemical class 0.000 description 14
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 7
- 239000002250 absorbent Substances 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 7
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 6
- 230000002745 absorbent Effects 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 235000019270 ammonium chloride Nutrition 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 230000000052 comparative effect Effects 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
- 235000013305 food Nutrition 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 150000005846 sugar alcohols Polymers 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 229930006000 Sucrose Natural products 0.000 description 2
- 150000005215 alkyl ethers Chemical class 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 229920000578 graft copolymer Polymers 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 239000002736 nonionic surfactant Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000005720 sucrose Substances 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- PYSRRFNXTXNWCD-UHFFFAOYSA-N 3-(2-phenylethenyl)furan-2,5-dione Chemical compound O=C1OC(=O)C(C=CC=2C=CC=CC=2)=C1 PYSRRFNXTXNWCD-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- VCUFZILGIRCDQQ-KRWDZBQOSA-N N-[[(5S)-2-oxo-3-(2-oxo-3H-1,3-benzoxazol-6-yl)-1,3-oxazolidin-5-yl]methyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical group O=C1O[C@H](CN1C1=CC2=C(NC(O2)=O)C=C1)CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F VCUFZILGIRCDQQ-KRWDZBQOSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229920000147 Styrene maleic anhydride Polymers 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000005211 alkyl trimethyl ammonium group Chemical group 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000000679 carrageenan Substances 0.000 description 1
- 229920001525 carrageenan Polymers 0.000 description 1
- 235000010418 carrageenan Nutrition 0.000 description 1
- 229940113118 carrageenan Drugs 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 229920006037 cross link polymer Polymers 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000013611 frozen food Nutrition 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- KVBGVZZKJNLNJU-UHFFFAOYSA-N naphthalene-2-sulfonic acid Chemical compound C1=CC=CC2=CC(S(=O)(=O)O)=CC=C21 KVBGVZZKJNLNJU-UHFFFAOYSA-N 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000825 pharmaceutical preparation Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920001296 polysiloxane 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
- 159000000001 potassium salts Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920006027 ternary co-polymer Polymers 0.000 description 1
- UHVMMEOXYDMDKI-JKYCWFKZSA-L zinc;1-(5-cyanopyridin-2-yl)-3-[(1s,2s)-2-(6-fluoro-2-hydroxy-3-propanoylphenyl)cyclopropyl]urea;diacetate Chemical compound [Zn+2].CC([O-])=O.CC([O-])=O.CCC(=O)C1=CC=C(F)C([C@H]2[C@H](C2)NC(=O)NC=2N=CC(=CC=2)C#N)=C1O UHVMMEOXYDMDKI-JKYCWFKZSA-L 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、保冷剤用含水ゲル組成
物及び該含水ゲル組成物を含んでなる保冷剤に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydrogel composition for ice packs and a cold pack containing the hydrogel composition.
【０００２】0002
【従来の技術】従来より、保冷剤は生鮮食品の鮮度保持
や、病気の治療等のさまざまな分野で用いられている。
かかる保冷剤は、凝固点における潜熱を利用して保冷効
果を提供せんとするものであり、かかる保冷剤としては
吸水性樹脂の含水ゲル組成物を、プラスチック製やゴム
製の袋又は容器中に密封したものが知られている。BACKGROUND OF THE INVENTION Conventionally, cold packs have been used in various fields such as preserving the freshness of fresh foods and treating diseases. Such ice packs attempt to provide a cold preservation effect by utilizing latent heat at the freezing point, and are made by sealing a water-containing gel composition of water-absorbing resin in a bag or container made of plastic or rubber. What has been done is known.
【０００３】しかし、該保冷剤は冷却して使用する場合
に、硬く固まってしまうといった欠点があった。たとえ
ば、生鮮食品の保冷用として使用する場合には硬くなっ
た保冷剤により冷凍食品が傷付けられるといった欠点や
、また病気の治療として使用する場合には、患部との密
着性が悪いといった欠点があり実用的でなかった。[0003] However, this ice pack has a drawback that it hardens when used after being cooled. For example, when used to keep fresh food cold, frozen food may be damaged by the hard ice pack, and when used to treat illnesses, it has the disadvantage of poor adhesion to the affected area. It wasn't practical.
【０００４】そこで、吸水性樹脂の含水ゲル組成物に無
機塩を添加することにより、冷却下にも柔軟性を保持し
うる保冷剤が提案された。しかし、かかる保冷剤であっ
ても、実質的な保冷効果を有する凝固点では凝結して硬
く固まってしまうといった欠点や、吸水性樹脂の吸水倍
率が低下する等の欠点があった。その他にも、吸水性樹
脂の含水ゲル組成物に親水性有機溶剤を添加した保冷剤
が提案されているが、これも前記同様、冷却下の柔軟性
は改良されているものの、凝固点では凝結するといった
欠点があった。[0004] Therefore, an ice pack has been proposed that can maintain flexibility even under cooling by adding an inorganic salt to a water-containing gel composition of a water-absorbing resin. However, even such ice packs have drawbacks such as condensation and solidification at the solidification point where they have a substantial cold preservation effect, and a decrease in the water absorption capacity of the water absorbent resin. In addition, ice packs have been proposed in which a hydrophilic organic solvent is added to a water-containing gel composition of a water-absorbent resin, but as mentioned above, this also has improved flexibility under cooling, but it condenses at the freezing point. There were some drawbacks.
【０００５】[0005]
【発明が解決しようとしている課題】本発明は、これら
従来技術の諸欠点を解消せんとするものである。すなわ
ち、本発明の目的は０℃以下の低温域に凝固点を有しな
がら、かつ該凝固点以下の温度においても柔軟性を保持
しうる保冷剤用含水ゲル組成物、及び該含水ゲル組成物
を含んでなる保冷剤を提供せんとするものである。SUMMARY OF THE INVENTION The present invention attempts to overcome these drawbacks of the prior art. That is, the object of the present invention is to provide a hydrogel composition for a cold pack that has a freezing point in a low temperature range of 0° C. or lower and can maintain flexibility even at temperatures below the freezing point, and a hydrogel composition that includes the hydrogel composition. We aim to provide an ice pack made of
【０００６】[0006]
【課題を解決するための手段】本発明者らは前記従来技
術の課題を解決すべく、保冷剤に使用する含水ゲル組成
物について鋭意研究を重ねた結果、意外にも、吸水性樹
脂を含んでなる含水ゲル組成物を、疎水性有機溶剤に分
散させて得られる分散物からなる含水ゲル組成物が、０
℃以下の低温域における凝固点以下の温度においても柔
軟性を保持しうることを見出し、本発明を完成するに至
った。[Means for Solving the Problems] In order to solve the problems of the prior art, the present inventors have conducted extensive research on water-containing gel compositions used in ice packs, and have surprisingly found that they contain water-absorbing resins. A hydrogel composition consisting of a dispersion obtained by dispersing a hydrogel composition consisting of
The present inventors have discovered that flexibility can be maintained even at temperatures below the freezing point in the low temperature range below .degree. C., and have completed the present invention.
【０００７】すなわち、本発明は、吸水性樹脂を含んで
なる含水ゲル組成物を、−２０℃以下の凝固点を有する
疎水性有機溶剤に分散させて得られる分散物からなるこ
とを特徴とする保冷剤用含水ゲル組成物、及びプラスチ
ック製もしくはゴム製の袋又は容器中に、該ゲル組成物
を含有してなることを特徴とする保冷剤に関する。That is, the present invention provides a cold storage product comprising a dispersion obtained by dispersing a water-containing gel composition containing a water-absorbing resin in a hydrophobic organic solvent having a freezing point of -20°C or lower. The present invention relates to a water-containing gel composition for pharmaceutical preparations, and a cold pack containing the gel composition in a plastic or rubber bag or container.
【０００８】まず、本発明の含水ゲル組成物について説
明する。First, the hydrogel composition of the present invention will be explained.
【０００９】本発明で使用する吸水性樹脂としては、各
種公知のものが使用できるが、なかでも吸水倍率、保水
能、吸水後の強度等が優れている点から、構成成分中に
カルボキシル基またはその塩を有する単量体単位を含有
するものが好ましい。カルボキシル基またはその塩を含
有する吸水性樹脂としては、例えば、（メタ）アクリル
酸塩重合物の架橋物、デンプン／（メタ）アクリル酸塩
共重合物の架橋物、スチレン−無水マレイン酸塩共重合
体の架橋物、ポリビニルアルコール／（メタ）アクリル
酸塩グラフト共重合物、多糖類−アクリロニトリルグラ
フト共重合体のケン化物塩の架橋物、（メタ）アクリル
酸／アクリルアミド／スルホン化アクリルアミド３元共
重合物塩の架橋物、アクリル酸塩／メタクリル酸塩共重
合体の架橋物などがあげられる。その他の吸水性樹脂と
しては、ポリビニルアルコール架橋体、ポリエチレング
リコールの架橋体、ポリビニルピロリドン架橋体、ポリ
アクリルアミド架橋体、カラギーナン、α−化デンプン
等があげられる。これらは、単独で用いてもよく、２種
以上を併用してもよい。また、低温域において柔軟性を
付与させる点からすれば、吸水性樹脂は粉末状がよい。Various known water-absorbing resins can be used as the water-absorbing resin used in the present invention, but among them, carboxyl groups or Those containing a monomer unit having a salt thereof are preferred. Examples of water-absorbing resins containing carboxyl groups or salts thereof include crosslinked products of (meth)acrylate polymers, crosslinked products of starch/(meth)acrylate copolymers, and styrene-maleic anhydride copolymers. Crosslinked polymers, polyvinyl alcohol/(meth)acrylate graft copolymers, crosslinked saponified salts of polysaccharide-acrylonitrile graft copolymers, (meth)acrylic acid/acrylamide/sulfonated acrylamide ternary copolymers Examples include crosslinked products of polymer salts, crosslinked products of acrylate/methacrylate copolymers, and the like. Examples of other water-absorbing resins include crosslinked polyvinyl alcohol, crosslinked polyethylene glycol, crosslinked polyvinylpyrrolidone, crosslinked polyacrylamide, carrageenan, alpha-starch, and the like. These may be used alone or in combination of two or more. In addition, from the point of view of imparting flexibility in a low temperature range, the water-absorbing resin is preferably in powder form.
【００１０】また、含水組成物は凝固点降下作用のある
水溶性化合物や、０℃以下に凝固点を有する親水性有機
溶剤を含有してもよく、これらの化合物を含有させるこ
とにより保冷効果、柔軟性をさらに向上させることがで
きる。[0010] The water-containing composition may also contain a water-soluble compound that has a freezing point lowering effect or a hydrophilic organic solvent that has a freezing point below 0°C, and by containing these compounds, it can improve the cooling effect and flexibility. can be further improved.
【００１１】凝固点降下作用のある無機化合物としては
、各種公知のものが使用でき、たとえば、硫酸、硝酸、
塩酸、リン酸、ホウ酸、炭酸等のカルシウム塩、ナトリ
ウム塩、カリウム塩、アンモニウム塩等の無機塩、尿素
、チオ尿素等の非電解質化合物や有機酸や有機酸塩、水
溶性オリゴマー、水溶性高分子、ショ糖等があげられ、
これらの１種を単独で又は２種以上を組み合わせて使用
することができる。こららのなかでも吸水性樹脂の吸水
倍率等を考慮すれば、１価陽イオンの無機塩、特に硫酸
、硝酸、塩酸の１価陽イオンの無機塩や、尿素を使用す
るのがよい。Various known inorganic compounds can be used as the inorganic compound having a freezing point lowering effect, such as sulfuric acid, nitric acid,
Calcium salts such as hydrochloric acid, phosphoric acid, boric acid, carbonic acid, inorganic salts such as sodium salts, potassium salts, ammonium salts, etc., non-electrolyte compounds such as urea and thiourea, organic acids and organic acid salts, water-soluble oligomers, water-soluble Examples include polymers, sucrose, etc.
One type of these can be used alone or two or more types can be used in combination. Among these, considering the water absorption capacity of the water-absorbing resin, it is preferable to use inorganic salts of monovalent cations, especially inorganic salts of monovalent cations such as sulfuric acid, nitric acid, and hydrochloric acid, and urea.
【００１２】０℃以下に凝固点を有する親水性有機溶剤
としては、特に限定されず、吸水性樹脂の吸水倍率、保
水能、吸水速度、吸水後のゲル強度を阻害しないもので
あればよい。かかる親水性有機溶剤は含水ゲル組成物に
、さらに柔軟性を付与するために使用されるものである
。具体的には、エチレングリコール、ポリエチレングリ
コール、プロピレングリコール、ポリプロピレングリコ
ール、グリセリン等の多価アルコール類；メチルアルコ
ール、エチルアルコール、イソプロピルアルコール等の
低級１価アルコ−ル類；エチレングリコールモノエチル
エーテル等の多価アルコールエーテル等があげられ、こ
れらの１種を単独で又は２種以上を組み合わせて使用す
る。これらのなかでも、多価アルコール類が好ましく、
特にプロピレングリコールを使用するのが好ましい。The hydrophilic organic solvent having a freezing point below 0° C. is not particularly limited as long as it does not inhibit the water absorption capacity, water retention capacity, water absorption rate, or gel strength after water absorption of the water absorbent resin. Such a hydrophilic organic solvent is used to impart further flexibility to the hydrogel composition. Specifically, polyhydric alcohols such as ethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, and glycerin; lower monohydric alcohols such as methyl alcohol, ethyl alcohol, and isopropyl alcohol; and ethylene glycol monoethyl ether. Examples include polyhydric alcohol ethers, and one type thereof may be used alone or two or more types may be used in combination. Among these, polyhydric alcohols are preferred;
Particular preference is given to using propylene glycol.
【００１３】本発明の含水ゲル組成物の前記各構成成分
の使用量は、所望の保冷温度により適宜選択して決定す
ればよいが、通常は、吸水性樹脂０．３〜７０重量％程
度に対して、水９９．７〜３０重量％程度である。好ま
しくは吸水性樹脂１〜２５重量％程度に対して、水９９
〜７５重量％程度である。吸水性樹脂が０．３重量％未
満では完全に吸水ができなくなり保冷剤としての形態保
持性が悪くなり、７０重量％を越えると過飽和の状態と
なりかえって保冷効果が低下する。[0013] The amount of each component used in the hydrogel composition of the present invention may be appropriately selected and determined depending on the desired cooling temperature, but it is usually about 0.3 to 70% by weight of the water absorbent resin. On the other hand, water is about 99.7 to 30% by weight. Preferably about 1 to 25% by weight of water absorbent resin and 99% of water.
It is about 75% by weight. If the water-absorbing resin is less than 0.3% by weight, it will not be able to absorb water completely and its shape retention as a cold pack will be poor, and if it exceeds 70% by weight, it will be in a supersaturated state and the cold-insulating effect will deteriorate.
【００１４】また、含水ゲル組成物中の前記水溶性化合
物の含有量は、２０重量％程度以下とされる。２０重量
％を越えると吸水性樹脂の吸水倍率が低下する傾向にあ
るためである。前記親水性有機溶剤の含有量は、３０重
量％程度以下とされる。３０重量％を越えるとかえって
保冷効果が低下する傾向にあるためである。また、その
他の凝固点降下作用のある水溶性化合物の含有量は、１
０重量％程度以下とされる。１０重量％を越えるとかえ
って保冷効果が低下する。[0014] Furthermore, the content of the water-soluble compound in the hydrogel composition is about 20% by weight or less. This is because if it exceeds 20% by weight, the water absorption capacity of the water absorbent resin tends to decrease. The content of the hydrophilic organic solvent is about 30% by weight or less. This is because if it exceeds 30% by weight, the cold insulation effect tends to decrease. In addition, the content of other water-soluble compounds that have a freezing point lowering effect is 1
It is about 0% by weight or less. If it exceeds 10% by weight, the cold insulation effect will actually decrease.
【００１５】また、含水ゲル組成物中には着色剤、防腐
剤、消泡剤等の各種添加剤を入れることも任意である。[0015] Furthermore, various additives such as colorants, preservatives, antifoaming agents, etc. may optionally be added to the hydrogel composition.
【００１６】上記含水ゲル組成物を製造する方法として
は特に制限されず、各種公知の方法によればよい。たと
えば、所望量の吸水性樹脂及び水、必要に応じて親水性
有機溶剤等を同時に混合し含水ゲル組成物を生成させる
方法や、吸水性樹脂、必要に応じて親水性有機溶剤等を
容器等に入れたのちに水を注入し含水ゲル組成物を生成
させる方法等があげられる。なお、含水ゲル組成物の混
合方法は特に制限されず、撹拌機、ニーダー等を使用し
てもよい。The method for producing the above-mentioned hydrogel composition is not particularly limited, and various known methods may be used. For example, a method of simultaneously mixing a desired amount of a water-absorbing resin, water, and if necessary a hydrophilic organic solvent to form a hydrogel composition, or a method of mixing a water-absorbing resin and a hydrophilic organic solvent, if necessary, in a container, etc. Examples include a method in which a hydrogel composition is produced by pouring water into the solution and then injecting water into the solution. Note that the method of mixing the hydrogel composition is not particularly limited, and a stirrer, a kneader, or the like may be used.
【００１７】本発明では、前記含水ゲル組成物を、−２
０℃以下の凝固点を有する疎水性有機溶剤に分散させて
得られる分散物を保冷剤用含水ゲル組成物として使用す
る。−２０℃以下の凝固点を有する疎水性有機溶剤とし
ては−２０℃以下で液状のものであれば特に限定される
ものではない。凝固点が−２０℃より高いと分散物から
なる含水ゲル組成物が凝固点で固くなってしまうため好
ましくない。かかる疎水性有機溶剤としては、たとえば
、オクタノール、オクタンジオール、１，４−ジクロル
ブタン、ジクロルエタン、ｎ−ヘプタン、シリコーンオ
イル等があげられる。含水ゲル組成物を疎水性有機溶剤
に分散させる方法は、特に制限されず、たとえば両者を
混合撹拌する方法によればよい。また、混合撹拌するに
際しては分散性をよくするため界面活性剤を使用するの
が好ましい。界面活性剤としては、特に制限されず、た
とえば、ポリオキシエチレンアルキルフェニルエーテル
、ポリオキシエチレンアルキルエーテル、ポリオキシエ
チレン脂肪酸エステル、ポリオキシエチレンアルキルエ
ーテル、ショ糖脂肪酸エステル、ソルビタン脂肪酸エス
テル等の非イオン性界面活性剤；アルキルピコリニウム
クロライド、アルキルトリメチルアンモニウムクロライ
ド等のカチオン性界面活性剤；β−ナフタレンスルホン
酸ソーダホルマリン縮合物、ジアルキルスルホコハク酸
エステル塩、ポリオキシアルキルエーテルの硫酸エステ
ル塩、ポリオキシアルキルエーテルのリン酸エステル塩
等のアニオン性界面活性剤があげられる。これらのなか
でも吸水性樹脂の吸水倍率に影響を与えない点を考慮す
れば、非イオン性界面活性剤がよく、特にＨＬＢ価６〜
１８のものがよい。[0017] In the present invention, the water-containing gel composition is -2
A dispersion obtained by dispersing in a hydrophobic organic solvent having a freezing point of 0° C. or lower is used as a hydrogel composition for a cold pack. The hydrophobic organic solvent having a freezing point of -20°C or lower is not particularly limited as long as it is liquid at -20°C or lower. If the freezing point is higher than -20°C, the hydrogel composition made of the dispersion will become hard at the freezing point, which is not preferable. Examples of such hydrophobic organic solvents include octanol, octanediol, 1,4-dichlorobutane, dichloroethane, n-heptane, and silicone oil. The method of dispersing the hydrogel composition in the hydrophobic organic solvent is not particularly limited, and may be, for example, a method of mixing and stirring the two. Further, when mixing and stirring, it is preferable to use a surfactant to improve dispersibility. The surfactant is not particularly limited, and includes nonionic surfactants such as polyoxyethylene alkylphenyl ether, polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene alkyl ether, sucrose fatty acid ester, and sorbitan fatty acid ester. Cationic surfactants such as alkylpicolinium chloride and alkyltrimethylammonium chloride; β-naphthalenesulfonic acid soda formalin condensate, dialkyl sulfosuccinate ester salt, sulfate ester salt of polyoxyalkyl ether, polyoxyalkyl Examples include anionic surfactants such as ether phosphate ester salts. Among these, nonionic surfactants are preferred, especially those with an HLB value of 6 to
18 is good.
【００１８】また、疎水性有機溶剤の使用量は前記含水
ゲル組成物１００重量部に対して、通常３０〜４００重
量部程度、好ましくは５０〜３００重量部である。３０
重量部未満では分散物からなる含水ゲル組成物が凝固点
以下の温度で固くなってしまい、４００重量部を越える
と流動体となるため保冷剤としての形態保持性が悪くな
るので好ましくない。また、界面活性剤は、分散前の含
水ゲル組成物１００重量部に対して通常１０重量部程度
以下とするのがよい。The amount of the hydrophobic organic solvent used is usually about 30 to 400 parts by weight, preferably 50 to 300 parts by weight, based on 100 parts by weight of the hydrogel composition. 30
If it is less than 400 parts by weight, the hydrogel composition made of the dispersion will become hard at a temperature below the freezing point, and if it exceeds 400 parts by weight, it will become a fluid and its shape retention as a refrigerant will deteriorate, which is not preferable. Further, the amount of the surfactant is preferably about 10 parts by weight or less based on 100 parts by weight of the hydrogel composition before dispersion.
【００１９】本発明の保冷剤は、前記保冷剤用ゲル組成
物を、プラスチック製もしくはゴム製の袋又は容器中に
含有してなる。該袋又は容器としては各種公知のもので
よく、たとえばポリエチレン、ポリプロピレン、ポリ塩
化ビニル等の各種のプラスチック製や各種のゴム製のも
のでよい。また、本発明に使用する袋又は容器は不織布
で覆うことにより、接触面の感触をよくすることもでき
る。The ice pack of the present invention contains the gel composition for a cold pack in a plastic or rubber bag or container. The bag or container may be of any known type, and may be made of various plastics such as polyethylene, polypropylene, polyvinyl chloride, or various rubbers. Furthermore, the bag or container used in the present invention can be covered with a nonwoven fabric to improve the feel of the contact surface.
【００２０】本発明の保冷剤を製造する方法としては特
に制限されず、各種公知の方法で、保冷剤用ゲル組成物
を袋又は容器中に密封する方法によればよい。密封方法
は押し出し機等による圧入包装によってもよい。The method for producing the cold pack of the present invention is not particularly limited, and any known method may be used, such as sealing the gel composition for a cold pack in a bag or container. The sealing method may be press-fit packaging using an extruder or the like.
【００２１】[0021]
【発明の効果】本発明の、含水ゲル組成物を疎水性有機
溶剤に分散させてなる分散物は、０℃以下の低温域に凝
固点を有し、かつ凝固点以下の温度においても柔軟性を
保持している。したがって、各構成成分を調節すること
により、特定の低温を長時間保持しうる各種用途に応じ
た保冷剤を提供でき、生鮮食品の保存や、病気の治療等
のさまざまな分野で好適に使用できる。Effects of the Invention The dispersion of the present invention, which is obtained by dispersing the hydrogel composition in a hydrophobic organic solvent, has a freezing point in the low temperature range of 0°C or lower, and maintains flexibility even at temperatures below the freezing point. are doing. Therefore, by adjusting each component, it is possible to provide ice packs suitable for various uses that can maintain a specific low temperature for a long period of time, and can be suitably used in various fields such as preserving fresh foods and treating diseases. .
【００２２】[0022]
【実施例】以下に実施例及び比較例をあげて本発明をさ
らに詳細に説明するが、本発明はこれら実施例に限定さ
れるものではない。なお、各例中、部は重量部を表す。[Examples] The present invention will be explained in more detail with reference to Examples and Comparative Examples below, but the present invention is not limited to these Examples. In each example, parts represent parts by weight.
【００２３】実施例１
５００ｍｌのビーカーに、粉末状の吸水性樹脂（荒川化
学工業（株）製、商品名アラソーブＳ−１００）１０部
及び水２００部を加えて膨潤させ、含水ゲルを得た。次
いで、シリコーンオイル（信越化学（株）製、商品名信
越シリコーンＫＦ−９６、凝固点−６０℃）１２０部、
界面活性剤（第一工業製薬（株）製、商品名ノイゲンＥ
Ａ−８０Ｅ）４部を加え２分間撹拌し、分散させて含水
ゲル組成物の分散物を得た。該ゲル組成物の分散物をポ
リ塩化ビニル製の袋の内に入れ、袋の開口部をヒ−トシ
−ルして閉じ保冷剤を作成した。Example 1 10 parts of a powdered water-absorbing resin (manufactured by Arakawa Chemical Co., Ltd., trade name Arasorb S-100) and 200 parts of water were added to a 500 ml beaker and swelled to obtain a hydrous gel. . Next, 120 parts of silicone oil (manufactured by Shin-Etsu Chemical Co., Ltd., trade name Shin-Etsu Silicone KF-96, freezing point -60°C),
Surfactant (manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Neugen E)
A-80E) (4 parts) was added and stirred for 2 minutes to obtain a dispersion of a hydrogel composition. The dispersion of the gel composition was placed in a polyvinyl chloride bag, and the opening of the bag was heat-sealed to prepare an ice pack.
【００２４】実施例２
実施例１において水及び疎水性有機溶剤の使用量を表１
に示したように変えた他は実施例１と同様にして保冷剤
を作成した。Example 2 Table 1 shows the amounts of water and hydrophobic organic solvent used in Example 1.
An ice pack was prepared in the same manner as in Example 1 except for the changes shown in .
【００２５】実施例３〜７
実施例１において、表１に示したように水の使用量を変
え、さらに吸水性樹脂の含水ゲルに塩化アンモニウム、
尿素及びエチレングリコールの少なくとも一種を加えて
含水ゲルを製造した他は実施例１と同様にして保冷剤を
作成した。Examples 3 to 7 In Example 1, the amount of water used was changed as shown in Table 1, and ammonium chloride and ammonium chloride were added to the water-containing gel of the water-absorbent resin.
A cold pack was prepared in the same manner as in Example 1, except that at least one of urea and ethylene glycol was added to produce a hydrogel.
【００２６】比較例１〜２
実施例１において、表１に示したように水の使用量を変
え、さらに吸水性樹脂に塩化アンモニウム及び／又はエ
チレングリコールを加えて含水ゲルを製造し、かつ該含
水ゲルを分散させなかったこと以外は実施例１と同様に
して保冷剤を作成した。Comparative Examples 1 to 2 In Example 1, the amount of water used was changed as shown in Table 1, and ammonium chloride and/or ethylene glycol were added to the water-absorbing resin to produce a hydrogel. A cold pack was prepared in the same manner as in Example 1 except that the hydrogel was not dispersed.
【００２７】[0027]
【表１】[Table 1]
【００２８】試験例
実施例及び比較例で得られた保冷剤を−２５℃に保った
冷蔵庫内に１０時間入れ、冷却後の保冷剤の凝固点を、
理学電機（株）製高性能示差走査熱量計ＤＳＣ８２３０
により測定した。また、凝固点以上（凝固点より３〜５
℃高温）及び凝固点以下（凝固点より３〜５℃低温）で
の保冷剤の感触を、指触により判定した。結果を表２に
示す。Test Examples The cold packs obtained in the Examples and Comparative Examples were placed in a refrigerator kept at -25°C for 10 hours, and the freezing point of the cold packs after cooling was determined as follows:
High performance differential scanning calorimeter DSC8230 manufactured by Rigaku Denki Co., Ltd.
It was measured by Also, above the freezing point (3 to 5 points below the freezing point)
The feel of the ice pack at temperatures below the freezing point (3 to 5 degrees Celsius lower than the freezing point) was evaluated by touch with the finger. The results are shown in Table 2.
【００２９】指触評価は、◎：非常に柔らかい、○：柔
らかい、△：やや固い、×：固い、に従った。The finger touch evaluation was as follows: ◎: very soft, ◯: soft, △: somewhat hard, ×: hard.
【００３０】[0030]
【表２】[Table 2]
Claims (3)
物を、−２０℃以下の凝固点を有する疎水性有機溶剤に
分散させて得られる分散物からなることを特徴とする保
冷剤用含水ゲル組成物。1. A hydrogel for ice packs, comprising a dispersion obtained by dispersing a hydrogel composition containing a water-absorbing resin in a hydrophobic organic solvent having a freezing point of -20°C or lower. Composition.
用のある無機化合物及び／又は０℃以下に凝固点を有す
る親水性有機溶剤を含んでなることを特徴とする請求項
１記載の含水ゲル組成物。2. The hydrogel composition according to claim 1, wherein the hydrogel composition comprises an inorganic compound having a freezing point lowering effect and/or a hydrophilic organic solvent having a freezing point below 0°C. thing.
は容器中に、請求項１または２記載の含水ゲル組成物を
含んでなることを特徴とする保冷剤。3. A cold pack comprising the hydrogel composition according to claim 1 or 2 in a plastic or rubber bag or container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3092967A JPH04218586A (en) | 1990-09-29 | 1991-03-29 | Hydrated gel composition for cold-insulating agent and cold-insulating agent containing the hydrated gel composition |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2-261109 | 1990-09-29 | ||
| JP26110990 | 1990-09-29 | ||
| JP3092967A JPH04218586A (en) | 1990-09-29 | 1991-03-29 | Hydrated gel composition for cold-insulating agent and cold-insulating agent containing the hydrated gel composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04218586A true JPH04218586A (en) | 1992-08-10 |
Family
ID=26434331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3092967A Pending JPH04218586A (en) | 1990-09-29 | 1991-03-29 | Hydrated gel composition for cold-insulating agent and cold-insulating agent containing the hydrated gel composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04218586A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001089755A (en) * | 1999-09-21 | 2001-04-03 | Nippon Shokubai Co Ltd | Cold energy-storing material, and cooling medium containing the cold energy-storing material |
| JP2006046886A (en) * | 2004-02-04 | 2006-02-16 | Sk Kaken Co Ltd | Floor heating structure |
| JP2006525547A (en) * | 2003-05-06 | 2006-11-09 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Electrowetting module |
| JP2011033334A (en) * | 2004-02-04 | 2011-02-17 | Sk Kaken Co Ltd | Floor heating structure |
| JP2015189816A (en) * | 2014-03-27 | 2015-11-02 | トッパン・フォームズ株式会社 | Cold insulation tool |
-
1991
- 1991-03-29 JP JP3092967A patent/JPH04218586A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001089755A (en) * | 1999-09-21 | 2001-04-03 | Nippon Shokubai Co Ltd | Cold energy-storing material, and cooling medium containing the cold energy-storing material |
| JP4597289B2 (en) * | 1999-09-21 | 2010-12-15 | 株式会社日本触媒 | Cold storage material and cooling medium comprising the cold storage material |
| JP2006525547A (en) * | 2003-05-06 | 2006-11-09 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Electrowetting module |
| JP2006046886A (en) * | 2004-02-04 | 2006-02-16 | Sk Kaken Co Ltd | Floor heating structure |
| JP2011033334A (en) * | 2004-02-04 | 2011-02-17 | Sk Kaken Co Ltd | Floor heating structure |
| JP2015189816A (en) * | 2014-03-27 | 2015-11-02 | トッパン・フォームズ株式会社 | Cold insulation tool |
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