NO129354B - - Google Patents
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- NO129354B NO129354B NO00535/71A NO53571A NO129354B NO 129354 B NO129354 B NO 129354B NO 00535/71 A NO00535/71 A NO 00535/71A NO 53571 A NO53571 A NO 53571A NO 129354 B NO129354 B NO 129354B
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- composition
- weight
- gel
- water
- gelling agent
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- 239000000203 mixture Substances 0.000 claims description 30
- 239000003349 gelling agent Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 229920002907 Guar gum Polymers 0.000 claims description 12
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 12
- 239000000665 guar gum Substances 0.000 claims description 12
- 235000010417 guar gum Nutrition 0.000 claims description 12
- 229960002154 guar gum Drugs 0.000 claims description 12
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 11
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 11
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 11
- 239000003792 electrolyte Substances 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000013078 crystal Substances 0.000 claims description 8
- 229920000926 Galactomannan Polymers 0.000 claims description 6
- OMDQUFIYNPYJFM-XKDAHURESA-N (2r,3r,4s,5r,6s)-2-(hydroxymethyl)-6-[[(2r,3s,4r,5s,6r)-4,5,6-trihydroxy-3-[(2s,3s,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]methoxy]oxane-3,4,5-triol Chemical group O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@@H]1OC[C@@H]1[C@@H](O[C@H]2[C@H]([C@@H](O)[C@H](O)[C@@H](CO)O2)O)[C@H](O)[C@H](O)[C@H](O)O1 OMDQUFIYNPYJFM-XKDAHURESA-N 0.000 claims description 5
- 239000003755 preservative agent Substances 0.000 claims description 4
- 239000000499 gel Substances 0.000 description 16
- 239000002826 coolant Substances 0.000 description 6
- 239000003507 refrigerant Substances 0.000 description 5
- 230000008014 freezing Effects 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 229910021538 borax Inorganic materials 0.000 description 3
- 239000004328 sodium tetraborate Substances 0.000 description 3
- 235000010339 sodium tetraborate Nutrition 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 241000206672 Gelidium Species 0.000 description 1
- 229920000161 Locust bean gum Polymers 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 235000010419 agar Nutrition 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- WQZGKKKJIJFFOK-PHYPRBDBSA-N alpha-D-galactose Chemical compound OC[C@H]1O[C@H](O)[C@H](O)[C@@H](O)[C@H]1O WQZGKKKJIJFFOK-PHYPRBDBSA-N 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 125000004181 carboxyalkyl group Chemical group 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229930182830 galactose Natural products 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000003966 growth inhibitor Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000711 locust bean gum Substances 0.000 description 1
- 235000010420 locust bean gum Nutrition 0.000 description 1
- 125000000311 mannosyl group Chemical group C1([C@@H](O)[C@@H](O)[C@H](O)[C@H](O1)CO)* 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 229920002866 paraformaldehyde Polymers 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2303/00—Details of devices using other cold materials; Details of devices using cold-storage bodies
- F25D2303/08—Devices using cold storage material, i.e. ice or other freezable liquid
- F25D2303/085—Compositions of cold storage materials
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Jellies, Jams, And Syrups (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
- Freezing, Cooling And Drying Of Foods (AREA)
Description
Sammensetning som egner seg til anvendelse Composition suitable for use
i kjøleelementer. in cooling elements.
Den foreliggende oppfinnelse angår en sammensetning som egner seg til anvendelse i kjøleelementer, og som inneholder en blanding av et geleringsmiddel, vann og eventuelt en eller flere elektrolytter og et eller flere konserveringsmidler. The present invention relates to a composition which is suitable for use in cooling elements, and which contains a mixture of a gelling agent, water and possibly one or more electrolytes and one or more preservatives.
Kjøleelementer f.eks. i form av plastposer fylt med et kjøle-middel, f.eks. vann, er vel kjent. Disse elementer blir først av-kjølt, vanligvis i det minste til kjølemiddelet er fullstendig Cooling elements, e.g. in the form of plastic bags filled with a refrigerant, e.g. water, is well known. These elements are first cooled, usually at least until the coolant is complete
frosset. Kjøleelementene blir sammen med de gjenstander som skal holdes på en viss lav temperatur, anbragt inne i en varmeisolerende pakning eller beholder. Mesteparten av den innstrømmende varme ab-sorberes av kjøleelementene i form av kjølémiddelets smeltevarme. frozen. The cooling elements, together with the objects to be kept at a certain low temperature, are placed inside a heat-insulating package or container. Most of the incoming heat is absorbed by the cooling elements in the form of the coolant's heat of fusion.
En ulempe ved denne kjølemetode er at det smeltede kjøle-middel kan strømme ut og komme i direkte berøring med de; avkjølte gjenstander hvis omhylningen rundt kjøleimiddelet går istykkér. Det har derfor vært foreslått å hindre lekkasje ved tilsetning av et geleringsmiddel til kjølemiddelet.-. De. f ores låtte geleringsmidler har imidlertid vist seg utilfredsstillende i praksis, spesielt når kjølemiddelet inneholder eiv vesentlig andel elektrolytt. Skjønt kjølemiddelet antok gelform, noe som hindret lekkasje i tilfelle åv små skader på kjøleelementet> rant det allikevel ut hvis omhylningen ble alvorlig^skadd. ■■ > A disadvantage of this cooling method is that the molten coolant can flow out and come into direct contact with them; cooled objects if the coating around the refrigerant becomes thicker. It has therefore been proposed to prevent leakage by adding a gelling agent to the coolant. The. However, the aforementioned gelling agents have proved unsatisfactory in practice, especially when the coolant contains a significant proportion of electrolyte. Although the coolant assumed gel form, which prevented leakage in the event of minor damage to the cooling element, it still leaked out if the casing was seriously damaged. ■■ >
US-PS 2.979.463 omhandler en kjølemiddelsammensetning som inneholder US-PS 2,979,463 relates to a refrigerant composition containing
1. et smeltepunktnedsettende middel hvorav urea er en vesentlig 1. a melting point depressant of which urea is an essential one
bestanddel, x constituent, x
2. en vannoppløselig "varmeisolator" hvorav de eneste nevnte 2. a water-soluble "heat insulator" of which the only ones mentioned
eksempler er gips og pulverformet asbest, examples are gypsum and powdered asbestos,
3. et geldannende eller "viskositetsøkende" middel. 3. a gel-forming or "viscosity-increasing" agent.
Bestanddelene 1 bg 2 er vesentlige; bestanddeler, mens bestanddel 3 er valgfri. The components 1 bg 2 are essential; components, while component 3 is optional.
US-PS 2.800.456 beskriver et kjølemiddel fremstilt av is-partikler belagt med et pulverformet geldannende kolloid. Etterhvert som isen smelter, blir sammensetningen en gel. Foruten vann inneholder den resulterende gel et geleringsmiddel, som kan være forgela-tinert stivelse, bentonittleire, natriumkarboksymetylcellulose og an-tagelig blandinger av disse stoffer. Ingen andre eksempler på egnede geleringsmidler er angitt, men det er angitt at geleringsmiddelet skal være et middel som danner gelen med kaldt vann. Uttrykkelig utelukket er slike midler som bare danner geler med varmt vann, f.eks. ugelati-nerte stivelser, gelatin og agar-agar. Dessuten kan gelen inneholde boraks,formaldehyd eller paraformaldehyd og elektrolytter eller opp-løselige metallsalter, -oksyder og. -hydroksyder. Patentskriftet inneholder ikke noen angivelse.om. et middel som undertrykker krystallvekst. US-PS 2,800,456 describes a refrigerant made from ice particles coated with a powdered gel-forming colloid. As the ice melts, the composition becomes a gel. In addition to water, the resulting gel contains a gelling agent, which may be pregelatinized starch, bentonite clay, sodium carboxymethyl cellulose and presumably mixtures of these substances. No other examples of suitable gelling agents are given, but it is stated that the gelling agent should be an agent which forms the gel with cold water. Explicitly excluded are agents that only form gels with warm water, e.g. ungelatinized starches, gelatin and agar-agar. In addition, the gel may contain borax, formaldehyde or paraformaldehyde and electrolytes or soluble metal salts, oxides and. -hydroxides. The patent document does not contain any indication. an agent that suppresses crystal growth.
FR-PS 1.403.957 beskriver anvendelse av karboksymetylcellulose som geleringsmiddel. FR-PS 1,403,957 describes the use of carboxymethyl cellulose as a gelling agent.
Hensikten med den foreliggende oppfinnelse er å skaffe en sammensetning som ikke strømmer ut selv om beholderen eller omhylningen for kjølemiddelet blir alvorlig, skadd.. The purpose of the present invention is to provide a composition which does not flow out even if the container or the casing for the refrigerant becomes seriously damaged.
Sammensetningen ifølge oppfinnelsen, er karakterisert ved at geleringsmiddelet er et galactomannan og at sammensetningen dessuten The composition according to the invention is characterized in that the gelling agent is a galactomannan and that the composition furthermore
Som et middel som undertrykker krystallvekst,. inneholder karbok- . symetylcellulose i en mengde av. 0,5 - 5 vektprosent av den samlede sammensetning. As an agent that suppresses crystal growth,. contains carbo- . symethylcellulose in an amount of. 0.5 - 5 percent by weight of the overall composition.
Galactomannan er en generisk betegnelse: på naturlig fore-kommende gummier som består av galaktose- og mannoseenheter. Gummier som klassifiseres som galactomannaner, omfatter guargummi og johannesbrødgummi. Galactomannanet kan være substituert på en hvilken som helst måte som ikke.gjør det uegnet som geleringsmiddel. Guargummi kan f.eks. inneholde substituenter som hydroksyalkyl, karboksy-alkyl, alkyl,etc. Et spesielt foretrukket geleringsmiddel er metylert guargummi, d.v.s. guargummi som er blitt substituert med metyl-grupper. Dette geleringsmiddel eir meget .effektivt også når vannet inneholder en stor mengde elektrolytt. Geleringsmiddelet er tilstede i tilstrekkelig mengde til å danne en sterk, elastisk gel som ikke vil strømme ut hvis dens beholder rives opp eller går i stykker. Det krystallveksthemmende middel hindrer vekst av iskrystaller som vil kunne bryte ned gelstrukturen. i den frosne gel. Galactomannan is a generic term: for naturally occurring gums that consist of galactose and mannose units. Gums classified as galactomannans include guar gum and locust bean gum. The galactomannan may be substituted in any manner which does not render it unsuitable as a gelling agent. Guar gum can e.g. contain substituents such as hydroxyalkyl, carboxy-alkyl, alkyl, etc. A particularly preferred gelling agent is methylated guar gum, i.e. guar gum which has been substituted with methyl groups. This gelling agent is also very effective when the water contains a large amount of electrolyte. The gelling agent is present in sufficient quantity to form a strong, elastic gel which will not flow out if its container is torn open or broken. The crystal growth inhibitor prevents the growth of ice crystals that could break down the gel structure. in the frozen gel.
Den:foretrukne mengde karboksymetylcellulose er 1 - 3 vektprosent av den samlede sammensetningen. The preferred amount of carboxymethylcellulose is 1-3 percent by weight of the total composition.
..Sammensetningen ifølge oppfinnelsen er en stiv gel og kan best beskrives som en mer eller mindre gummilignende elastisk substans. Gelen må naturligvis være istand til å tåle lave temperaturer og ..The composition according to the invention is a stiff gel and can best be described as a more or less rubber-like elastic substance. The gel must of course be able to withstand low temperatures and
være tilstrekkelig elastisk til å tillate en ekspansjon på ca. 10% be sufficiently elastic to allow an expansion of approx. 10%
(svarende til utvidelsesgraden av vann ved frysing). (corresponding to the degree of expansion of water during freezing).
I henhold til oppfinnelsen er tilstedeværelsen av et middel som undertrykker krystallvekst, avgjørende. Det er funnet at hvis et slikt middel ikke tilsettes, vil der ved frysing fås en meget mangelfull gelstruktur, slik at vannet eller elektrolyttoppløsningen etter tining vil renne ut av omhylningen hvis denne er gått istykker. Dette finner spesielt sted når fryse- og tineoperasjonen gjentas (d.v.s. når kjøleelementet anvendes påny). Karboksymetylcellulose, som er lett tilgjengelig og relativt billig, blir ifølge oppfinnelsen anvendt som tilsetning til undertrykkelse av krystallvekst. According to the invention, the presence of an agent which suppresses crystal growth is essential. It has been found that if such an agent is not added, a very poor gel structure will be obtained during freezing, so that the water or electrolyte solution after thawing will flow out of the coating if it has broken. This takes place in particular when the freezing and thawing operation is repeated (i.e. when the cooling element is used again). According to the invention, carboxymethyl cellulose, which is easily available and relatively cheap, is used as an additive to suppress crystal growth.
For å sikre en gjentatt anvendelse av kjøleelementene hvis dette ønskes, blir et konserveringsmiddel fortrinnsvis tilsatt sammensetningen, idet geleringaanidlene vanligvis er tilbøyelige til biologisk spalting. Meget egnede konserveringsmidler er f.eks. de forskjellige kvartære ammoniumbaser. In order to ensure a repeated use of the cooling elements if desired, a preservative is preferably added to the composition, the gelling agents being usually prone to biological decomposition. Very suitable preservatives are e.g. the various quaternary ammonium bases.
Kjølesammensetningen kan inneholde en eller flere elekt.ro-lytter. Den mengde elektrolytt som tilsettes, er fortrinnsvis slik at den oppnåddé sammensetning er mer eller mindre lik den sammensetning som har det eutéktiske frysepunkt for det anvendte elektrolytt/vann-system. The cooling composition may contain one or more electrolytics. The amount of electrolyte that is added is preferably such that the composition obtained is more or less similar to the composition that has the eutectic freezing point for the electrolyte/water system used.
Geleringsmiddelet anvendes vanligvis i andeler på 1 - 20% av den samlede vekt av sammensetningen. Metylert guargummi- anvendes fortrinnsvis i mengder på 3 - 10% av den samlede vekt.- I en sammensetning med et høyt elektrolyttinnhold (f.eks. 15 - 40 vektprosent) foretrekkes det å anvende 5,5 - 6,5 vektprosent metylert guargummi. The gelling agent is usually used in proportions of 1 - 20% of the total weight of the composition. Methylated guar gum - is preferably used in amounts of 3 - 10% of the total weight. - In a composition with a high electrolyte content (e.g. 15 - 40 percent by weight) it is preferred to use 5.5 - 6.5 percent by weight methylated guar gum.
I fravær av elektrolytter foretrekkes én mengde på 3,5 - 4,5 vektprosent metylert guargummi. In the absence of electrolytes, one amount of 3.5 - 4.5 weight percent methylated guar gum is preferred.
I nærvær av vesentlige mengder elektrolytt foretrekkes eri mengde på 1,5 - 2,5 vektprosent karboksymetylcellulose, og i fravær av elektrolytt menes en mengde på 1 - 1,5 vektprosent karboksymetylcellulose å være best. In the presence of significant amounts of electrolyte, an amount of 1.5 - 2.5 percent by weight carboxymethyl cellulose is preferred, and in the absence of electrolyte, an amount of 1 - 1.5 percent by weight carboxymethyl cellulose is believed to be best.
Sammensetningen ifølge oppfinnelsen kan fås fra en tørr. blanding ved blanding med vann. Den foretrukne blanding inneholder metylert guargummi som geleringsmiddel og karboksymetylcellulose som middel til undertrykkelse av krystallvekst i et forhold på mellom 1:1 og 10:1. De vanlige sammensetninger som fremstilles ved fremgangs-måten ifølge oppfinnelsen, kari med fordel anvendes i en omslutning av plastmateriale, f.eks. polyeten, eller i et omslag av belagt eller ubelagt papir. The composition according to the invention can be obtained from a dry. mixing by mixing with water. The preferred mixture contains methylated guar gum as a gelling agent and carboxymethylcellulose as a crystal growth suppressant in a ratio of between 1:1 and 10:1. The usual compositions produced by the method according to the invention are advantageously used in an enclosure of plastic material, e.g. polyethylene, or in a cover of coated or uncoated paper.
Oppfinnelsen belyses av følgende eksempler: The invention is illustrated by the following examples:
EKSEMPEL 1 EXAMPLE 1
Der ble fremstilt en pulverformet sammensetning ved blanding av 76,77 vektprosent guargummi, 22,9 3 vektdeler karboksymetylcellulose og 0,30 vektdeler boraks. Ved blanding med vann til en 3-6%'s oppløsning ble der oppnådd en gummilignende elastisk gel som kan fryses og tines flere ganger. A powdered composition was prepared by mixing 76.77 weight percent guar gum, 22.93 parts by weight carboxymethyl cellulose and 0.30 parts by weight borax. By mixing with water to a 3-6% solution, a rubber-like elastic gel was obtained which can be frozen and thawed several times.
EKSEMPEL 2. EXAMPLE 2.
Dette eksempel beskriver et to-komponentsystem som anvender to pulverformede bestanddeler. Pulver A var karboksymetylcellulose. Pulver. B besto av 73,89 vektprosent guargummi, 7,38 vektprosent kalsiumhydrat, .1,00 vektprosent kalsiumkarbonat, 14,78 vektprosent natriumsulfat og 2,95 vektprosent boraks. This example describes a two-component system using two powdered components. Powder A was carboxymethyl cellulose. Powder. B consisted of 73.89 weight percent guar gum, 7.38 weight percent calcium hydrate, .1.00 weight percent calcium carbonate, 14.78 weight percent sodium sulfate, and 2.95 weight percent borax.
15 vektdeler av pulver A ble oppløst i 221,73 vektdeler vann og 8 ,27 yekrtdeler; av en 1,0%'s svovelsyre , 57, 70 vektdeler av pulver B ble oppløst i 770 vektdeler vann. De to oppløsninger ble forenet, og etter 2-3 minutter dannet det seg en gummilignende elastisk gel. 15 parts by weight of powder A were dissolved in 221.73 parts by weight of water and 8.27 parts by weight; of a 1.0% sulfuric acid, 57.70 parts by weight of powder B were dissolved in 770 parts by weight of water. The two solutions were combined, and after 2-3 minutes a rubber-like elastic gel formed.
EKSEMPEL 3 EXAMPLE 3
Der ble fremstilt en blanding inneholdende 22,4 vektprosent NaCl, 2,0 vektprosent karboksymetylcellulose og 6,0 vektprosent metylert guargummi, mens resten var vann. A mixture containing 22.4% by weight of NaCl, 2.0% by weight of carboxymethyl cellulose and 6.0% by weight of methylated guar gum was prepared, while the remainder was water.
Den på denne måte oppnådde gel oppførte seg som et gummilignende elastisk stoff. Det ble frosset og tint en rekke ganger, og ikke noen av disse ganger ga den opptinte gel fra seg vesentlige væskemengder. The gel obtained in this way behaved as a rubber-like elastic substance. It was frozen and thawed a number of times, and none of these times did the thawed gel release significant amounts of liquid.
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7002050A NL7002050A (en) | 1970-02-13 | 1970-02-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO129354B true NO129354B (en) | 1974-04-01 |
Family
ID=19809316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO00535/71A NO129354B (en) | 1970-02-13 | 1971-02-12 |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS5239175B1 (en) |
| AR (1) | AR195769A1 (en) |
| AT (1) | AT327155B (en) |
| BE (1) | BE762890A (en) |
| BR (1) | BR7100754D0 (en) |
| CA (1) | CA967738A (en) |
| CH (1) | CH565854A5 (en) |
| DE (1) | DE2106817C2 (en) |
| DK (1) | DK146416C (en) |
| ES (1) | ES387938A1 (en) |
| FR (1) | FR2078280A5 (en) |
| GB (1) | GB1353773A (en) |
| NL (1) | NL7002050A (en) |
| NO (1) | NO129354B (en) |
| ZA (1) | ZA71293B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4332690A (en) | 1979-04-23 | 1982-06-01 | Mitsubishi Denki Kabushiki Kaisha | Heat storage system comprising a phase change medium and a nucleating agent |
| EP0141027A1 (en) * | 1983-07-18 | 1985-05-15 | Werner Heierli | Latent heat storage device |
| FR2620723B1 (en) * | 1987-09-23 | 1990-01-12 | Sofrigam | NEW REFRIGERANT ELEMENTS |
| DE4206827C2 (en) * | 1991-03-06 | 1994-03-31 | Sanyo Chemical Ind Ltd | Low temperature insulation material of the gel type |
| DE29812252U1 (en) * | 1998-07-09 | 1998-09-24 | Rubner, Michaela, 94330 Salching | Insulating cover |
| DE29823814U1 (en) * | 1998-07-09 | 1999-11-25 | Schmidt Angela | Heat-insulating lid |
| GB2615569A (en) * | 2022-02-11 | 2023-08-16 | Hydropac Ltd | Process for manufacturing a phase change material for a temperature-controlled shipping package |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1841258A (en) * | 1928-07-21 | 1932-01-12 | Copeland Products Inc | Liquid for use with refrigeration systems |
| GB473808A (en) * | 1936-10-31 | 1937-10-20 | Hugo Stratmann | Improvements in cooling mixtures |
| DE876688C (en) * | 1940-03-21 | 1953-05-18 | Fritz Werner | Liquids with a deep freezing point |
| US2979463A (en) * | 1956-03-21 | 1961-04-11 | Carl S Ferguson | Refrigerant composition |
| FR1379940A (en) * | 1963-12-26 | 1964-11-27 | Royal Super Ice Company | Refrigeration process and new refrigerant gel to be applied in this process |
-
1970
- 1970-02-13 NL NL7002050A patent/NL7002050A/xx not_active Application Discontinuation
-
1971
- 1971-01-18 ZA ZA710293A patent/ZA71293B/en unknown
- 1971-01-29 BR BR754/71A patent/BR7100754D0/en unknown
- 1971-02-02 CH CH150171A patent/CH565854A5/xx not_active IP Right Cessation
- 1971-02-04 ES ES387938A patent/ES387938A1/en not_active Expired
- 1971-02-05 FR FR7103992A patent/FR2078280A5/fr not_active Expired
- 1971-02-09 JP JP46005035A patent/JPS5239175B1/ja active Pending
- 1971-02-12 DE DE2106817A patent/DE2106817C2/en not_active Expired
- 1971-02-12 BE BE762890A patent/BE762890A/en not_active IP Right Cessation
- 1971-02-12 CA CA105,187A patent/CA967738A/en not_active Expired
- 1971-02-12 NO NO00535/71A patent/NO129354B/no unknown
- 1971-02-12 DK DK65571A patent/DK146416C/en not_active IP Right Cessation
- 1971-02-15 AR AR234003A patent/AR195769A1/en active
- 1971-02-15 AT AT127071A patent/AT327155B/en not_active IP Right Cessation
- 1971-04-19 GB GB2172471A patent/GB1353773A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1353773A (en) | 1974-05-22 |
| AR195769A1 (en) | 1973-11-09 |
| JPS5239175B1 (en) | 1977-10-04 |
| DE2106817A1 (en) | 1971-10-14 |
| CA967738A (en) | 1975-05-20 |
| AT327155B (en) | 1976-01-26 |
| NL7002050A (en) | 1971-08-17 |
| CH565854A5 (en) | 1975-08-29 |
| DK146416C (en) | 1984-03-05 |
| BR7100754D0 (en) | 1973-04-19 |
| DK146416B (en) | 1983-10-03 |
| ATA127071A (en) | 1975-04-15 |
| FR2078280A5 (en) | 1971-11-05 |
| ES387938A1 (en) | 1974-01-01 |
| ZA71293B (en) | 1971-10-27 |
| DE2106817C2 (en) | 1982-12-02 |
| BE762890A (en) | 1971-07-16 |
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