PRODUCTION METHOD OF CARBON DIOXIDE GAS-INCLUDING HYDROUS GEL ARTICLE

• Main Author: KIMURA SHOHEI
• Format: Patent
• Language: English; Japanese
• Published: 14.10.2021
• Subjects: HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS ORMEDICINAL PREPARATIONS; SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS

To provide a carbon dioxide gas-including hydrous gel article with good productivity, in the hydrous gel, with high concentration of a carbon dioxide gas included.SOLUTION: There is provided a production method of a carbon dioxide gas-including hydrous gel article comprising steps (1) to (3): (1) a step for adjusting an article including a hydrous gel which includes, a water soluble polymer, a cross linking agent of the water soluble polymer and water, and which has loss tangent at 1 Hz in dynamic viscoelasticity measurement of 0.46 or greater; (2) a step for adjusting a composition of a surrounding atmosphere so that, during a period in which, the loss tangent at 1 Hz in the dynamic viscoelasticity measurement of the hydrous gel in the article including the hydrous gel, is 0.46 or greater, so that concentration of a carbon dioxide gas in the surrounding atmosphere of the article including the hydrous gel, becomes 10 volume% or greater, and sealing the article including the hydrous gel in a packaging body; and (3) a step for advancing cross linking of the hydrous gel until the loss tangent at 1 Hz in the dynamic viscoelasticity measurement of the hydrous gel in the article including the hydrous gel, becomes less than 0.46, for obtaining the carbon dioxide gas-including hydrous gel article sealed in the packaging body.SELECTED DRAWING: Figure 1 【課題】含水ゲル中に炭酸ガスが高濃度で含有された炭酸ガス含有含水ゲル物品を生産性よく製造すること。【解決手段】工程（１）〜（３）を有する、炭酸ガス含有含水ゲル物品の製造方法。（１）水溶性高分子、該水溶性高分子の架橋剤及び水を含有する、動的粘弾性測定における１Ｈｚでの損失正接が０．４６以上である含水ゲルを有する物品を調製する。（２）前記含水ゲルを有する物品における前記含水ゲルの動的粘弾性測定における１Ｈｚでの損失正接が０．４６以上のうちに、該含水ゲルを有する物品の周囲雰囲気中の炭酸ガスの濃度が１０体積％以上となるように該周囲雰囲気の組成を調整するとともに該含水ゲルを有する物品を包装体内に密封する。（３）前記含水ゲルを有する物品における前記含水ゲルの動的粘弾性測定における１Ｈｚでの損失正接が０．４６未満となるまで該含水ゲルの架橋を進行させて、包装体内に密封された炭酸ガス含有含水ゲル物品を得る。【選択図】図１