초록

The invention relates to a flat and activable drying device for reducing the moisture content of a gas space surrounding said device and to a method for producing a device of this type. The inventive drying device contains a flat matrix with at least one regenerable drying agent.

대표청구항 ▼

1. An adhesive, activatable sheet-form drying device, comprising:a desiccant polymeric matrix containing a regenerable desiccant agent therein and having pressure-sensitive adhesive properties; a support layer disposed on one side of said matrix; and a release liner disposed on the other side of sai

1. An adhesive, activatable sheet-form drying device, comprising:a desiccant polymeric matrix containing a regenerable desiccant agent therein and having pressure-sensitive adhesive properties; a support layer disposed on one side of said matrix; and a release liner disposed on the other side of said matrix wherein the support layer is water-vapor-permeable. 2. The adhesive, activatable sheet-form drying device according to claim 1, wherein the polymeric matrix comprises at least one polymeric material selected from the group consisting of acrylates, silicones, polyisobutylens, SIS rubber, SEBS rubber, polyvinylpyrrolidone, polyurethane, polyesters, polyethylene, polyvinylalcohol, polyamides, ethylene-vinylacetate, polyacrylic acid, kollidon and cellulose derivatives thereof.3. The adhesive, activatable sheet-form drying device according to claim 1, wherein the regenerative desiccant is selected from the group consisting of CaSO4, CaSO4½H2O, CaCl2, Al2O3, CaO, Na2SO4, K2CO3, CuSO4, Mg(ClO4)2, MgSO4, silica gel and polyvinylpyrrolidone.4. The adhesive, activatable sheet-form drying device according to claim 1, wherein the water-vapor-permeable layer comprises a material selected from the group consisting of paper, cellulose, nonwovens and perforated films.5. The adhesive, activatable sheet-form drying device according to claim 1, wherein the release liner comprises a material selected from the group consisting of films containing polyethylene terephthalate, polyethylene, polypropylene, paper and modifications thereof.6. The adhesive, activatable sheet-form drying device according to claim 1, wherein the polymeric matrix further comprises one or more plasticizers selected from the group consisting of polyethylene glycol, polypropylene glycol, glycerol, miglyol, propane diol, triglycerides, diethyl phthalate and tributyl citrate.7. The adhesive, activatable sheet-form drying device according to claim 1, wherein the polymeric matrix further comprises one or more tackifiers selected from the group consisting of rosin esters, hydrogenated rosin esters and hydrocarbon resins.8. The adhesive, activatable sheet-form drying device according to claim 1, wherein the polymeric matrix further comprises a moisture indicator selected from the group consisting of copper (II) salts and cobalt (II) salts.9. The adhesive, activatable sheet-form drying device according to claim 8, wherein the desiccant comprises solid particles having a size from 1 to 50 μm.10. The adhesive, activatable sheet-form drying device according to claim 1, wherein the desiccant comprises solid particles having a size of from 1 to 200 μm.11. An adhesive, activatable sheet-from drying device, comprising:a desiccant polymeric matrix containing a regenerable desiccant therein; a support layer disposed on one or both sides of said matrix; a pressure-sensitive adhesive layer; and a release liner covering said pressure-sensitive adhesive layer wherein one or both support layer, art water-vapor-permeable. 12. The adhesive, activatable sheet-form drying device according to claim 11, wherein the polymeric matrix comprises at least one polymeric material selected from the group consisting of acrylates, silicones, polyisobutylens, SIS rubber, SEBS rubber, polyvinylpyrrolidone, polyurethane, polyesters, polyethylene, polyvinylalcohol, polyamides, ethylene-vinylacetate, polyacrylic acid, kollidon and cellulose derivatives thereof.13. The adhesive, activatable sheet-form drying device according to claim 11, wherein the regenerative desiccant is selected from the group consisting of CaSO4, CaSO4½H2O, CaCl2, Al2O3, CaO, Na2SO4, K2CO3, CuSO4, Mg(ClO4)2, MgSO4, silica gel and polyvinylpyrrolidone.14. The adhesive, activatable sheet-form drying device according to claim 11, wherein the water-vapor-permeable layer comprises a material selected from the group consisting of paper, cellulose, nonwovens and perforated films.15. The adhesive, activatable sheet-form drying device according to claim 11, wherein the support layer comprises a material selected from the group consisting of polyethylene terephthalate, polyethylene, polypropylene, paper and nonwovens.16. The adhesive, activatable sheet-form drying device according to claim 11, wherein the release liner comprises a material selected from the group consisting of films containing polyethylene terephthalate, polyethylene, polypropylene, paper and modifications thereof.17. The adhesive, activatable sheet-form drying device according to claim 11, wherein the polymeric matrix further comprises one or more plasticizers selected from the group consisting of polyethylene glycol, polypropylene glycol, glycerol, miglyol, propane diol, triglycerides, diethyl phthalate and tributyl citrate.18. The adhesive, activatable sheet-form drying device according to claim 11, wherein the polymeric matrix further comprises one or more tackifiers selected from the group consisting of rosin esters, hydrogenated rosin esters and hydrocarbon resins.19. The adhesive, activatable sheet-form drying device according to claim 11, wherein the polymeric matrix further comprises a moisture indicator selected from the group consisting of copper (II) salts and cobalt (II) salts.20. The adhesive, activatable sheet-form drying device according to claim 11, wherein the desiccant comprises solid particles having a size of from 1 to 200 μm.21. The adhesive, activatable sheet-form drying device according to claim 20, wherein the size of the solid particles is from 1 to 50 μm.22. A method of reducing moisture content and/or maintaining a reduced moisture content in a closed gas space surrounding a drying device comprising the steps of:a) converting an activatable drying device as claimed in claim 1 or 11 by activation into an active state; b) placing the activated drying device obtained according to step a) above into the gas-space whose moisture content is to be reduced and/or whose reduced moisture content is to be maintained; c) airtightly closing said gas space with respect to the surroundings. 23. The method according to claim 22, wherein a closed gas space is formed by an air tight packaging of moisture-sensitive articles.24. The method according to claim 23, wherein the moisture-sensitive articles are selected from the group consisting of tablets, transdermal therapeutic systems and sheet-form pharmaceutical administration forms for oral use.