US20160001264A1 - Composition for ambient moisture regulation, method of preparation thereof and use thereof to regulate the moisture of an environment - Google Patents

Composition for ambient moisture regulation, method of preparation thereof and use thereof to regulate the moisture of an environment Download PDF

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Publication number
US20160001264A1
US20160001264A1 US14/767,455 US201414767455A US2016001264A1 US 20160001264 A1 US20160001264 A1 US 20160001264A1 US 201414767455 A US201414767455 A US 201414767455A US 2016001264 A1 US2016001264 A1 US 2016001264A1
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Prior art keywords
moisture
composition
cellulose
magnesium chloride
gel
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US14/767,455
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English (en)
Inventor
Salvatore Davide CRAPANZANO
Donato COCINA
Dante Vaula
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Propagroup SpA
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Propagroup SpA
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Assigned to PROPAGROUP S.P.A. reassignment PROPAGROUP S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: COCINA, Donato, CRAPANZANO, Salvatore Davide, VAULA, DANTE
Publication of US20160001264A1 publication Critical patent/US20160001264A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28047—Gels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
    • B01J20/046—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium containing halogens, e.g. halides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/42—Applications of coated or impregnated materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
    • B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
    • B65D81/264—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/25—Coated, impregnated or composite adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/80—Water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/3028—Granulating, agglomerating or aggregating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/46—Materials comprising a mixture of inorganic and organic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/48—Sorbents characterised by the starting material used for their preparation
    • B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
    • B01J2220/4825—Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton
    • B01J2220/4831—Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton having been subjected to further processing, e.g. paper, cellulose pulp

Definitions

  • the present invention relates to a composition for moisture regulation in closed environments, such as packaging, containers, boxes or even shoes, for example.
  • desiccating materials are commonly used, generally supplied in breathable bags.
  • the most commonly used include silica gel, activated clay and hygroscopic salts.
  • a second limit is their poor or null regeneration capacity (i.e. moisture release) once maximum absorption has been reached. In these conditions they become unusable, and to re-activate them they have to be heated to over 100° C., with consequent high energy consumption and poor practicality in terms of use.
  • a third limit of some of these materials is their deliquescence, a phenomenon that consists in the formation of an aqueous solution following the absorption of moisture by a solid hygroscopic salt.
  • said solution can contain ions which are potentially corrosive for the material to be protected.
  • humidifiers which constantly release moisture until they become completely depleted.
  • the process is not controllable, with the risk of passing from an excessively dry environment to an excessively humid environment.
  • the object of the present invention is therefore to provide a new moisture regulation material which has a high capacity to retain or release moisture according to utilisation requirements, which is not subject to phenomena of deliquescence in all working conditions, which has a rapid regeneration capacity, and which can be used in direct contact with food.
  • the present invention which relates to a moisture regulation material according to claim 1 and a method for the preparation thereof according to claim 4 .
  • the moisture regulator consists of a solid material in stable gel form which maintains its form, it does not require any container, like boxes or bags, thus facilitating the use thereof.
  • FIG. 1 illustrates the results of the test conducted in example 3
  • FIG. 2 illustrates the results of the test conducted in example 4.
  • FIG. 3 illustrates the results of the test conducted in example 6
  • FIG. 4 illustrates the results of the test conducted in example 7.
  • FIG. 5 illustrates the results of the comparative analyses with the systems of the known art of example 8.
  • a composition for moisture regulation in stable gel form which maintains its form consisting of magnesium chloride, a cellulose selected from hydroxypropyl methyl cellulose and methyl hydroxyethyl cellulose and water, in which the ratio between the quantity of magnesium chloride and the cellulose is between 0.1 and 16, preferably between 0.5 and 4, more preferably equal to 1.
  • composition for moisture regulation indicates a composition able to absorb in a first step the ambient moisture which is then released in a second step at ambient temperature without the use of ovens or high temperatures.
  • composition thus obtained is in a stable gel form which maintains its form and is able to absorb moisture up to over 250% by weight in conditions of extreme relative moisture.
  • selection of the specific salt and specific gelling agent used in the above composition allows a moisture regulator to be obtained which does not have the deliquescence typical of chlorides and does not modify its aspect before and after absorption with enormous advantages in application terms. Furthermore it consists solely of components approved by the FDA in the food sector and therefore the composition can be used in direct contact with foodstuffs or as a coating for food wrappings.
  • the moisture regulator described here is edible.
  • the composition can be used as it is or alternatively it can be used inside a wrapping, for example a container or a bag, permeable to moisture.
  • a method is furthermore provided for preparation of the composition described above.
  • compositions comprising hygroscopic salts and cellulose are known, as illustrated for example in U.S. Pat. No. 7,326,363 and U.S. Pat. No. 7,927,655.
  • the first comprises the addition of small quantities of cellulose to a solution of calcium chloride prepared previously (method in solution).
  • said method has the drawback of producing a highly non-uniform sample, with the presence of lumps, which require various precautions to be taken during the production process (minimum gradual dosages of cellulose, atomisation of the solution, etc.). Consequently, said method is less effective, more costly and disadvantageous in energy terms with respect to the synthesis method of the present invention.
  • the known art proposes a second dry method illustrated in U.S. Pat. No. 7,927,655.
  • Said method comprises mixing of the two solid components which are then conditioned in a climatic chamber.
  • the method of the invention overcomes the drawbacks described above.
  • the first step consists in the preparation of a solution obtained by dissolving the magnesium chloride in water.
  • the solution thus obtained is heated to a temperature above 50° C., preferably 70° C.
  • the cellulose in powder form is added by stirring.
  • the solution thus obtained is then quenched to temperatures below 10° C., preferably below 5° C.
  • the gel obtained is then conditioned in a climatic chamber under the desired conditions according to the final application.
  • the product thus obtained can be used in numerous applications for moisture regulation in an environment, inside packaging, containers, boxes or even shoes.
  • composition of the invention can be added to the composition of the invention, such as fragrances and antibacterial substances for example, in relation to the desired use.
  • a known quantity of salt is dissolved in 10 ml of demineralised water.
  • the solution obtained is then heated in a water bath to a temperature of approximately 70° C.
  • 1 g of hydroxypropyl methyl cellulose (HPMC) in powder is added, stirring with a rod, and the mixture thus obtained is quenched in an ice bath to a temperature of 5° C. to ensure rapid gelation.
  • HPMC hydroxypropyl methyl cellulose
  • Table 1 illustrates the quantities used for preparation of the samples prior to conditioning.
  • the conditioning parameters can have a temperature of 23° C. and a relative moisture of 40%. After said conditioning the samples have the compositions listed in table 2.
  • the conditioning parameters can have a temperature of 30° C. and a relative moisture of 90%. After said conditioning, the samples have the compositions listed in table 3.
  • table 2 The samples of table 2 were analysed in relation to their maximum absorption capacity when subjected to high moisture conditions. The test was performed by placing the samples in a climatic chamber at 40° C. with a relative moisture value of 75%. The results obtained are shown in table 4.
  • the increase in the absorption data is not linearly proportional to the increase in the quantity of magnesium chloride, since the latter determines an increase in the quantity of gelation water in the starting system.
  • the sample C0.5-low of table 2 was analysed in relation to its capacity to absorb moisture in bland conditions and to regenerate at atmospheric conditions.
  • the test was performed by placing the sample in a climatic chamber at 40° C. with a relative moisture of 75% for 8 hours, then allowing regeneration in the air for 16 hours. These conditions were chosen to simulate a relatively short utilisation condition (8 hours) as desiccant, and a longer regeneration phase (16 hours).
  • the system is able to absorb 40% of the moisture during the ambient desiccation phases (8 h each). Said value is equal to the maximum possible quantity of moisture absorbed (see table 1) denoting an excellent response speed of the system under the ambient conditions.
  • the system During regeneration, the system is able to return to the starting condition (complete regeneration) after 16 hours at ambient conditions. It should also be noted that the system has an identical absorption and regeneration behaviour at each analysis cycle, highlighting an extreme reversibility.
  • the sample C0.5-low presented in table 2 was analysed in relation to its capacity to absorb moisture in conditions of stress and to regenerate under atmospheric conditions.
  • the test was performed by placing the sample in a climatic chamber at 40° C. with a relative moisture of 75% for 16 hours and then allowing regeneration in the air for 8 hours. Contrarily to what was observed in the previous example, these conditions were chosen to simulate a relatively long utilisation condition (16 hours) and a shorter regeneration phase (8 hours).
  • test was performed cyclically (5 cycles) to evaluate the repeatability and continuity of use of the system.
  • the system is able to absorb approximately 40% of the moisture during the first cycle. As already observed previously, said value is equal to the maximum possible quantity of moisture absorbed (see table 1).
  • the system is able to return to the starting condition (complete regeneration) also following a short regeneration (8 hours). Said data highlights that the system is able to regenerate in a short period of time, thus optimising its use.
  • FIG. 2 it can be seen that the system has an identical absorption and regeneration behaviour at each analysis cycle, highlighting an excellent reversibility.
  • the quantity of water vapour desorbed increases as the quantity of magnesium chloride increases.
  • the increase in the desorption data is not linearly proportional to the increase in the quantity of magnesium chloride.
  • the sample C0.5-high in table 3 was analysed in relation to its capacity to release moisture in bland utilisation conditions and to regenerate at high relative moisture.
  • the sample shows a considerable dehumidification capacity.
  • the sample is able to exchange moisture with the environment for a value equal to 28% in weight.
  • the sample shows an even greater humidification capacity with respect to the equilibrium value (28%), stabilising at a value of around 57%.
  • a sample of moisture regulator C1 according to the invention was prepared as illustrated in example 1 with the formulation of table 1. The sample was then conditioned at 23° C. with 40% relative moisture, to operate as a moisture regulator for high ambient moisture values.
  • the C1 Desiccating and Reference Boxes were closed and placed in a climatic chamber, with the corresponding T-RH logger to collect data at 5 minute intervals.
  • composition of the invention were evaluated with a dynamometer according to the European standard ISO 527-3.
  • the samples were synthesised and conditioned at 23° C. and 40% relative moisture or at 40° C. and 75% relative moisture, according to the method described in example 1. Strips were then made measuring 20 ⁇ 150 mm with a thickness of 2.0 mm.
  • the mechanical properties of the composition subject of the invention can be compared to gelatinous materials.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Drying Of Gases (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
US14/767,455 2013-02-13 2014-02-13 Composition for ambient moisture regulation, method of preparation thereof and use thereof to regulate the moisture of an environment Abandoned US20160001264A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT000116A ITTO20130116A1 (it) 2013-02-13 2013-02-13 Composizione per la regolazione dell'umidita' ambientale
ITTO2013A000116 2013-02-13
PCT/IB2014/058980 WO2014125437A1 (en) 2013-02-13 2014-02-13 Composition for ambient moisture regulation, method of preparation thereof and use thereof to regulate the moisture of an environment

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PCT/IB2014/058980 A-371-Of-International WO2014125437A1 (en) 2013-02-13 2014-02-13 Composition for ambient moisture regulation, method of preparation thereof and use thereof to regulate the moisture of an environment

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US15/871,921 Active 2034-07-10 US10751696B2 (en) 2013-02-13 2018-01-15 Composition for ambient moisture regulation, method of preparation thereof and use thereof to regulate the moisture of an environment

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US (2) US20160001264A1 (zh)
EP (1) EP2956237B1 (zh)
JP (1) JP6363625B2 (zh)
CN (1) CN105163845B (zh)
CA (1) CA2901068C (zh)
DK (1) DK2956237T3 (zh)
IT (1) ITTO20130116A1 (zh)
MX (1) MX2015010412A (zh)
RU (1) RU2640540C2 (zh)
WO (1) WO2014125437A1 (zh)

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CN110637123A (zh) * 2017-05-08 2019-12-31 斯道拉恩索公司 水分控制材料

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CN112958044A (zh) * 2021-02-03 2021-06-15 杭州家爽包装材料有限公司 一种干燥剂的制备方法及干燥剂

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RU2015138934A (ru) 2017-03-17
US10751696B2 (en) 2020-08-25
US20180133689A1 (en) 2018-05-17
EP2956237B1 (en) 2019-05-08
JP2016515036A (ja) 2016-05-26
RU2640540C2 (ru) 2018-01-09
ITTO20130116A1 (it) 2014-08-14
MX2015010412A (es) 2016-03-01
CN105163845B (zh) 2018-12-28
CA2901068A1 (en) 2014-08-21
CN105163845A (zh) 2015-12-16
WO2014125437A1 (en) 2014-08-21
CA2901068C (en) 2020-11-17
DK2956237T3 (da) 2019-07-29
EP2956237A1 (en) 2015-12-23

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