KR20150005753A - Heat-insulating composition, method for preparing thereof and heat-insulating material using the same - Google Patents
Heat-insulating composition, method for preparing thereof and heat-insulating material using the same Download PDFInfo
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- KR20150005753A KR20150005753A KR20130078340A KR20130078340A KR20150005753A KR 20150005753 A KR20150005753 A KR 20150005753A KR 20130078340 A KR20130078340 A KR 20130078340A KR 20130078340 A KR20130078340 A KR 20130078340A KR 20150005753 A KR20150005753 A KR 20150005753A
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- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
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Abstract
TECHNICAL FIELD The present invention relates to a heat insulating composition, a method of manufacturing the same, and a heat insulating material using the same, and more particularly, to a heat insulating composition comprising water, a super absorbent polymer (SAP), a hydrophobic powder and a silicone binder; Mixing water and a superabsorbent polymer (SAP) to prepare a gelated aqueous solution, adding a hydrophobic powder and stirring to obtain an aqueous dispersion mixture, and adding a silicone binder to the aqueous dispersion mixture / RTI > And a heat insulating material comprising the heat insulating substrate and the heat insulating composition layer of the present invention formed on the heat insulating substrate.
According to the present invention, it is possible to obtain a heat insulating composition suitable for high temperature heat insulation and heat insulation without affecting the properties of the hydrophobic powder, particularly the airgel powder, and furthermore, it is possible to obtain a heat insulating and heat insulating material .
Description
The present invention relates to a heat insulating composition, a method of manufacturing the same, and a heat insulating material using the same, and more particularly, to a composition and a method for manufacturing the same that maintain a heat insulating property when a hydrophobic powder is an airgel, And a thermal insulating material using such a composition.
Aerogel materials having hydrophobicity and porosity are widely used for heat insulation and heat shielding, among which silica airgel is a typical heat insulating material. However, in spite of excellent heat insulation performance, heat shield performance and sound absorption performance of aerogels, aerogels have not been applied to all fields of industry to date. The high price of aerogels is one of the reasons, and the lack of binder application technology due to the hydrophobicity of aerogels is another major reason.
Particularly, when airgel is used as a thermal insulation material when manufacturing insulating paint, thermal insulation coating, thermal insulation board, thermal insulation fiber blanket, automotive heat protector, high temperature piping insulation, etc., And application technology is being actively studied because it is improved remarkably.
However, one of the most difficult problems in such application techniques is the difficulty of mixing with the binder material due to their hydrophobicity and porosity when airgel materials are used.
That is, when a water-soluble binder is used, there is a problem that it is difficult to mix them because of hydrophobic airgel characteristics that are not mixed with water. To overcome this problem, in the case of using an organic binder, the hydrophobic aerogels are well mixed with an organic binder However, the organic binder having fluidity penetrates into the numerous micropores of the airgel.
As a result, since most of the organic binder is absorbed by the aerogels, there is a problem that the viscosity of the mixture becomes very high and the coating operation of the coating film becomes impossible. Therefore, in this case, there arises an inefficient problem that the amount of the organic binder should be increased greatly. As shown in Fig. 1, the micropores of the airgel are filled with the organic binder, so that the performance as a heat insulating material is lost. That is, the excellent thermal insulation of the airgel is a phenomenon caused by numerous pores in the interior, and since such pores are filled up as a binder, most of the heat insulating performance is lost.
That is, even when the organic binder is mixed with the airgel, it is very important to prevent the organic binder from entering the micropores of the airgel in order to obtain a uniformly mixed composition while maintaining the adiabatic properties of the airgel.
Therefore, when the composition of the airgel composition is effectively mixed with the binder while maintaining its properties, it is expected to be usefully used in related fields such as heat insulation, heat shielding, and sound absorption.
Accordingly, one aspect of the present invention is to provide an adiabatic composition having an excellent adiabatic effect while maintaining the characteristics of a hydrophobic powder.
Another aspect of the present invention is to provide a method for effectively producing such an adiabatic composition.
Another aspect of the present invention is to provide an excellent heat insulating material using the heat insulating composition of the present invention.
That is, according to one aspect of the present invention, there is provided an adiabatic composition comprising water, a superabsorbent polymer (SAP), a hydrophobic powder, and a silicone binder.
Wherein the superabsorbent polymer (SAP) is at least one component selected from the group consisting of polyacrylamide, polyacrylic acid, polymethacrylic acid, polyethylene oxide, polyvinyl alcohol, gelatin, polysaccharide, cellulose or derivatives thereof, Or a salt thereof.
The hydrophobic powder is preferably at least one selected from the group consisting of a silica airgel powder, a hydrophobic (Si, Ca, Al, Mg) xOy mineral powder, a hydrophobic silane surface treated inorganic compound, and a hydrophobic silane surface treated organic compound .
Wherein the silicone binder comprises a silicone resin represented by the following formula (1) and an organic diluent in a weight ratio of 30 to 90: 10 to 70: .
(Wherein, R 1 to R 8 are each independently hydrogen, C 1 - 8 alkyl, aryl, and C 3 - it may be selected from the group consisting of from 8 cycloalkyl, n is an integer from 1 to 100,000.)
It is preferable that each of R 1 to R 8 is independently selected from the group consisting of methyl, ethyl, and phenyl.
The organic diluent is preferably at least one selected from the group consisting of xylene, ethylbenzene, alcohol and water.
The weight ratio of the superabsorbent polymer (SAP) to water is preferably 1:50 to 1: 1000.
The weight ratio of the superabsorbent polymer (SAP) to the hydrophobic powder is preferably 1:10 to 1: 500.
The silicone binder is preferably contained in an amount of 50 to 150 parts by weight per 100 parts by weight based on the total weight of the water, the super absorbent polymer (SAP) and the hydrophobic powder.
According to another aspect of the present invention, there is provided a process for producing a water-soluble polymer, which comprises mixing water and a superabsorbent polymer (SAP) to prepare an aqueous solution in a gel state; Adding a hydrophobic powder and stirring to obtain an aqueous dispersion mixture; And adding a silicone binder to the aqueous dispersion mixture.
According to another aspect of the present invention, there is provided a heat insulating substrate comprising: a heat insulating substrate; And a heat insulating composition layer formed on the heat insulating substrate using the heat insulating composition of the present invention.
The heat insulating substrate is preferably selected from the group consisting of silica fibers, glass fibers, mineral wool (rock wool), ceramic wool, polymer fibers and carbon fibers.
According to the present invention, it is possible to obtain a heat insulating composition suitable for high temperature heat insulation and heat insulation without affecting the properties of the hydrophobic powder, particularly the airgel powder, and furthermore, it is possible to obtain a heat insulating and heat insulating material .
FIG. 1 schematically shows a process in which micropores of an airgel are filled with a binder to lose performance as a heat insulating material.
FIG. 2 is a schematic view showing a process in which the binder is prevented from penetrating into the fine pores of the airgel as a result of the coating of the airgel particles with the water-soluble substance in the case of the heat insulating composition of the present invention.
FIG. 3 is a photograph showing that the adhesion of the heat insulating composition of Example 1 to an iron plate is excellent.
4 is a photograph showing that the adhesion of the heat insulating composition of Example 2 to an iron plate is excellent.
Hereinafter, preferred embodiments of the present invention will be described. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below.
According to the present invention there is provided an adiabatic composition comprising water, a superabsorbent polymer (SAP), a hydrophobic powder and a silicone binder.
The heat insulating composition of the present invention may be prepared by preparing an aqueous solution in a gel state by mixing water and a superabsorbent polymer (SAP) before mixing the hydrophobic aerogel powder with a binder, adding a hydrophobic powder thereto, and obtaining an aqueous dispersion mixture The binder is mixed with the binder. Therefore, as a result of the coating of the aerogel particles with the water-soluble substance, the binder can not penetrate into the fine pores of the aerogels, as shown in Fig.
Accordingly, when the heat insulating composition of the present invention is dried in such a state, the volatile component of the binder and the water-soluble substance, which is mostly composed of water, evaporate and volatilize and are blown away, and the surface adhesion of the airgel particles is performed by the adhesive force of the remaining binder. That is, the original purpose of the binder is to give an adhesive force between the particles, and the binder introduced into the particles is inefficient and undesirable.
According to the present invention, not only the penetration of the binder into the inside of the particles but also the adhesion of the particles to the surface of the particles can be exerted. In addition, the inherent characteristics of the particles, that is, the heat insulating properties, can be maximized.
The term " adiabatic " as used herein is to be interpreted as a generic meaning including heat resistance and heat resistance.
According to the present invention, a hydrophobic powder such as a hydrophobic aerogel can obtain a heat insulating composition which is stable and uniformly mixed while maintaining its characteristics, which has a remarkable utility. That is, when the airgel is mixed with a general binder, the binder penetrates into the pores of the airgel, resulting in a significant deterioration of the inherent properties of the airgel, particularly the heat insulating properties. However, according to the present invention, an effective heat insulating composition without deterioration of such characteristics can be provided.
The superabsorbent polymer (SAP) of the present invention absorbs water and swells to form a gel when it is mixed with water. It absorbs water up to 1000 times its own weight and maintains a high viscosity in a gel state . This gel-state superabsorbent polymer (SAP) mixed aqueous solution does not affect the properties of the hydrophobic powder since only a very small amount remains in the solid phase even after the water is dried thereafter.
The superabsorbent polymer (SAP) which may be used in the present invention is selected from the group consisting of polyacrylamide, polyacrylic acid, polymethacrylic acid, polyethylene oxide, polyvinyl alcohol, gelatin, polysaccharide, cellulose or derivatives thereof, and chitosan It may contain at least one component or a salt thereof, preferably a polyacrylic acid or a salt thereof.
For example, sodium polyacrylate is a white powder, which is odorless and tasteless, a polymer of sodium acrylate, and is hydrophilic and hygroscopic. It slowly dissolves in water to make a transparent gel liquid with high viscosity. Since its viscosity is due to the ion development by a large number of anions in the molecule, the apparent viscosity increases and a high-viscosity solution can be formed. Therefore, the added amount is small and heat resistance is high. Can also be used for food. Also, it is one of merits that it is good in shelf life because there is no possibility of corruption or alteration like natural products.
An exemplary preparation method thereof is to obtain acrylic acid monosaccharide by the use of acrylic acid or acrylic acid ester as a raw material and saponification with sodium hydroxide, and the produced alcohol is removed by concentrating it. The concentrated sodium acrylate monomer is adjusted by adjusting the pH with sodium hydroxide and then polymerized by adding ammonium persulfate as a polymerization catalyst. The polymer obtained therefrom is gel-like, which can be dried, crushed and sieved to obtain sodium polyacrylate.
Cellulose or derivatives thereof include cellulose modified as in the case where a hydrogen bond is formed between -OH groups of cellulose, such as nitrocellulose, cellulose acetate, carboxymethylcellulose and the like.
However, the superabsorbent polymer (SAP) which can be used in the present invention is not limited to those having the above components, and any superabsorbent polymer (SAP) having a water absorption capacity of 50 g / g or more can be used, And a water absorption capacity of 50 to 1000 g / g. More preferably, the water absorption capacity of the super absorbent polymer (SAP) of the present invention is 300 to 500 g / g.
When the absorption capacity of the SAP is less than 50 g / g, the ability to absorb water is inadequate and a large amount of a superabsorbent polymer should be used. Therefore, a superabsorbent polymer (SAP) remains and affects the final properties of the hydrophobic powder There is a problem.
Preferably, the weight ratio of the SAP to water is in the range of 1:50 to 1: 1000. When the SAP is contained in an amount less than the above range, the amount of the superabsorbent polymer (SAP) (SAP) is contained in an amount exceeding the above range, the amount of the superabsorbent polymer (SAP) is excessively large The viscosity of the heat insulating composition becomes too large to be mixed with the hydrophobic powder. Therefore, the weight ratio of the superabsorbent polymer (SAP) to water is more preferably 1: 100 to 1: 500.
The weight ratio of the SAP to the hydrophobic powder is preferably 1:10 to 1: 500, and more preferably 1: 100 to 1: 200.
When the hydrophobic powder is contained in an amount less than the above range, the amount of the hydrophobic powder in the heat insulating composition becomes too small, which is inefficient in realizing the characteristics of the hydrophobic powder. When the hydrophobic powder is contained in an amount exceeding the above range There is a problem in that it is difficult to obtain a desired type of heat insulating composition such as a uniformly dispersed flowable gel or liquid form since the volume of the hydrophobic powder becomes excessively large.
The average particle diameter of the hydrophobic powder that can be used in the present invention is preferably 0.001 mm to 5 mm, more preferably 0.01 mm to 0.15 mm. It is most preferable to use a hydrophobic powder having an average particle diameter of 0.001 mm to 5 mm in view of viscosity control, compoundable amount, and uniform mixing possibility.
The viscosity of the heat insulating composition of the hydrophobic powder is preferably 100 to 200,000 cp, more preferably 1000 to 20,000 cp. When the viscosity is less than 100 cp, there is a problem that the aerogels and moisture are phase-separated and not mixed. When the viscosity exceeds 200,000 cp, the viscosity becomes excessively high and stirring becomes difficult.
On the other hand, the hydrophobic powder is a porous hydrophobic powder, which is a hydrophobic silica airgel powder, a hydrophobic (Si, Ca, Al, Mg) xOy mineral powder, a hydrophobic silane surface treated inorganic compound, and a hydrophobic silane surface treated organic compound And the like. The mineral powder may be, for example, but not limited to, a pearlite powder, and the pearlite powder may be subjected to a hydrophobic surface treatment such as a hydrophobic silane surface treatment.
The silica airgel powder that can be used in the present invention may be any hydrophobic silica airgel powder known in the art to include all of the airgel powder modified with the hydrophobic porous surface of the airgel and may be limited to a specific type of silica airgel powder It is not.
In particular, the hydrophobic silica airgel refers to a silica airgel which has been subjected to a hydrophobic surface treatment so as to prevent moisture absorption in the air, and the hydrophobic surface treatment can be performed by any method known in the art. For example, a silylated silica airgel or the like may be used, though not particularly limited thereto.
The hydrophobic (Si, Ca, Al, Mg) xOy mineral powders mean hydrophobic mineral powders such as CaO, MgO, Al 2 O 3 and the like, wherein x is 1 to 9 and y is 1 to 9 May be determined to constitute the compound within the numerical range.
Further, the silicone binder which can be used in the present invention preferably contains a silicone resin represented by the following formula (1) and an organic diluent in a weight ratio of 30 to 90: 10 to 70: When the silicone resin represented by the formula (1) is contained in an amount of less than 30 parts by weight per 100 parts by weight of the total silicone binder, there may be a problem in adhesion due to an absolute amount of the binder. When the amount exceeds 90 parts by weight, There is a difficult problem with mixing.
Wherein R, R 1 to R 8 are each independently hydrogen, C 1 - 8 alkyl, aryl, and C 3 - may be selected from the group consisting of from 8 cycloalkyl, n is an integer from 1 to 100,000. More specifically, R 1 to R 8 may each independently be selected from the group consisting of methyl, ethyl, and phenyl.
Further, the organic diluent is preferably an aromatic hydrocarbon, an alcohol or water. More specifically, the aromatic hydrocarbon may be at least one selected from the group consisting of xylene, ethylbenzene, alcohol and water.
Meanwhile, the silicone binder may be used in combination with an additional auxiliary binder, and the auxiliary binder that can be mixed at this time may be at least one selected from the group consisting of water glass, and colloidal silica.
The silicone binder is preferably contained in an amount of 50 to 150 parts by weight per 100 parts by weight based on the total weight of water, a super absorbent polymer (SAP) and a hydrophobic powder, more preferably water, a superabsorbent polymer (SAP) And a weight equal to the total weight of the hydrophobic powder, i.e., 1: 1. When the silicone binder is contained in an amount of less than 50 parts by weight based on 100 parts by weight based on the total weight of the water, the super absorbent polymer (SAP) and the hydrophobic powder, the absolute amount of the binder used as the adhesive component becomes insufficient, There is a problem that it can not be used, and when it exceeds 150 parts by weight, it is not preferable because it consumes an excess amount of binder.
Further, the heat insulating composition of the present invention may further comprise, if necessary, at least one other additive selected from the group consisting of surfactants, inorganic fillers, curing agents, thickeners and defoamers.
Surfactants can be added as needed so that the hydrophobic aerogels mix better with the other ingredients. As the surfactant, any surfactant known in the related art can be used, and the kind of the surfactant is not limited. For example, alcohols such as ethanol, polyethylene glycol (PEG) Or more can be used together.
The inorganic filler may be further added in terms of economy and temperature resistance. As the inorganic filler, any inorganic filler known in the art may be used, including, but not limited to, ocher powder, mica, talc, silica, diatomaceous earth, pearlite, Zeolite, a ceramic hollow body, a silicate hollow body, and the like. These inorganic fillers may be used alone or in combination of two or more.
In the case of using such an inorganic filler, it is most preferable that no additional inorganic filler is added from the viewpoint of heat insulation, because the heat insulating property of the heat insulating composite is reduced as compared with the case where only hydrophobic airgel is included. However, from the economic point of view, the above-mentioned inorganic fillers can be used together.
The other additives are preferably contained in an amount of 0.01 to 100 parts by weight based on 100 parts by weight of the water-dispersed composition.
The heat insulating composition of the present invention can be obtained in a form that can be usefully used for coating, film formation or formation of a heat insulating layer.
The heat insulating composition of the present invention comprises water and a superabsorbent polymer (SAP) to prepare an aqueous solution in a gel state; Adding a hydrophobic powder and stirring to obtain an aqueous dispersion mixture; And adding a silicone binder to the aqueous dispersion mixture. The characteristics and contents of the components contained in the heat insulating composition of the present invention are as described above.
According to the present invention, first, the hydrophobic powder is stably dispersed to prepare a water dispersion mixture having excellent dispersibility. Such a water dispersion mixture does not cause phase separation even for a very long time. A uniformly mixed heat insulating composition can be obtained by subsequently adding a silicone binder to the water dispersion mixture.
Therefore, it is possible to more easily form a coating or coating film including hydrophobic powder, such as aerogels, having more improved characteristics. Further, since the hydrophobic powder can generate dust and the like during handling, such a problem can be solved when the manufacturing step of the present invention is used. Therefore, the heat insulating composition of the present invention is applicable to various applications including heat resistance, heat insulation, .
A heat insulating material having an excellent heat insulating effect can be obtained by using the heat insulating composition of the present invention. And a heat insulating composition layer formed on the heat insulating substrate using the heat insulating composition of the present invention.
At this time, the heat insulating substrate is preferably an inorganic heat insulating material and is preferably selected from the group consisting of, for example, silica fiber, glass fiber, mineral wool (rock wool), ceramic wool, polymer fiber and carbon fiber.
Further, it is preferable that the heat insulating base material and the heat insulating composition layer are alternately stacked two or more, and more preferably, each layer is alternately stacked from 2 to 6 layers. However, the present invention is not limited thereto, and a laminate composed of a suitable number of layers may be manufactured to suit the field to which the heat insulating material is applied.
On the other hand, the heat insulating composition layer is preferably 1 mm to 500 mm thick, more preferably 2 mm to 10 mm thick. If the thickness of the heat insulating composition layer is less than 1 mm, there is a problem in moldability and rigidity, and if it exceeds 500 mm, there is a problem in economical efficiency.
Hereinafter, the present invention will be described more specifically by way of specific examples. The following examples are provided to aid understanding of the present invention, and the scope of the present invention is not limited thereto.
<
Example
>
Example
1: Preparation of adiabatic composition
10 g of a superabsorbent polymer (SAP) (HI-SWELL, Songwon Co., Ltd.) and 5 g of carboxymethylcellulose were mixed with 200 g of water to prepare a gel-like aqueous solution. The viscosity of the gel-state aqueous solution measured using a viscosity meter (SV-10 kv, manufactured by AND Co., Ltd.) was 5200 CP.
50 g of an airgel was added to this aqueous solution and mixed at 2500 rpm for 20 minutes using a high-speed stirrer to obtain an aqueous-dispersed aerogel composition in which the airgel was uniformly dispersed.
100 g of the thus obtained aqueous dispersion aerogel composition was mixed with 100 g of a high temperature silicon binder (dry weight 50%) to obtain a heat insulating composition.
Comparative Example
1: Preparation of adiabatic composition
10 g of a superabsorbent polymer (SAP) (HI-SWELL, Songwon Co., Ltd.) and 5 g of carboxymethylcellulose were mixed with 200 g of water to prepare a gel-like aqueous solution. The viscosity of the gel-state aqueous solution measured using a viscosity meter (SV-10 kv, manufactured by AND Co., Ltd.) was 5200 CP.
50 g of an airgel was added to this aqueous solution and mixed at 2500 rpm for 20 minutes using a high-speed stirrer to obtain an aqueous-dispersed aerogel composition in which the airgel was uniformly dispersed.
100 g of the thus obtained aqueous dispersion aerogel composition was mixed with 300 g of a high temperature silicon binder (dry weight 50%) to obtain a heat insulating composition.
Comparative Example
2: Preparation of adiabatic composition
10 g of a superabsorbent polymer (SAP) (HI-SWELL, Songwon Co., Ltd.) and 5 g of carboxymethylcellulose were mixed with 200 g of water to prepare a gel-like aqueous solution. The viscosity of the gel-state aqueous solution measured using a viscosity meter (SV-10 kv, manufactured by AND Co., Ltd.) was 5200 CP.
50 g of an airgel was added to this aqueous solution and mixed at 2500 rpm for 20 minutes using a high-speed stirrer to obtain an aqueous-dispersed aerogel composition in which the airgel was uniformly dispersed.
100 g of the thus obtained aqueous dispersion aerogel composition was mixed with 4 g of a high temperature silicon binder (dry weight 50%) to obtain a heat insulating composition.
Example
2: Manufacture of insulating material
The adiabatic composition obtained in Example 1 was applied to a glass fiber mat (low density: 120 g / m 2 ) of about 0.5 mm and laminated to 1 mm to obtain a laminate. Four-ply laminate was laminated at 120 ° C for 3 hours And dried to produce a heat insulating material.
Example
3: Manufacture of insulating material
10 g of a superabsorbent polymer (SAP) (HI-SWELL, Songwon Co., Ltd.) and 5 g of carboxymethylcellulose were mixed with 200 g of water to prepare a gel-like aqueous solution. The viscosity of the gel-state aqueous solution measured using a viscosity meter (SV-10 kv, manufactured by AND Co., Ltd.) was 5200 CP.
50 g of an airgel was added to this aqueous solution and mixed at 2500 rpm for 20 minutes using a high-speed stirrer to obtain an aqueous-dispersed aerogel composition in which the airgel was uniformly dispersed.
100 g of the water-dispersed aerogel composition thus obtained was mixed with 70 g of a high-temperature silicone binder (50% in dry weight) and 30 g of a water glass solution to obtain a heat insulating composition.
Example
4: Manufacture of insulating material
10 g of a superabsorbent polymer (SAP) (HI-SWELL, Songwon Co., Ltd.) and 5 g of carboxymethylcellulose were mixed with 200 g of water to prepare a gel-like aqueous solution. The viscosity of the gel-state aqueous solution measured using a viscosity meter (SV-10 kv, manufactured by AND Co., Ltd.) was 5200 CP.
50 g of an airgel was added to this aqueous solution and mixed at 2500 rpm for 20 minutes using a high-speed stirrer to obtain an aqueous-dispersed aerogel composition in which the airgel was uniformly dispersed.
100 g of the water-dispersed aerogel composition thus obtained was mixed with 70 g of a high-temperature silicone binder (dry weight 50%) and 30 g of 30% colloidal silica to obtain a heat insulating composition.
Example
5: Preparation of adiabatic composition
10 g of a superabsorbent polymer (SAP) (HI-SWELL, Songwon Co., Ltd.) and 5 g of carboxymethylcellulose were mixed with 200 g of water to prepare a gel-like aqueous solution. The viscosity of the gel-state aqueous solution measured using a viscosity meter (SV-10 kv, manufactured by AND Co., Ltd.) was 5200 CP.
80 g of pearlite powder whose surface was hydrophobic was added to this aqueous solution and mixed at 2500 rpm for 20 minutes using a high speed stirrer to obtain a composition in which hydrophobic pearlite powder was uniformly dispersed.
100 g of the thus obtained composition was mixed with 100 g of a high temperature silicon binder (dry weight 50%) to obtain a heat insulating composition.
Experimental Example
1: Measurement of thermal conductivity
The heat insulating compositions of Examples 1 to 5 and Comparative Examples 1 and 2 were applied to an iron plate to a thickness of 3 mm, dried, and then the specimens were prepared in the form of a width x length x thickness 300 x 300 x 3 mm and thermal conductivity was measured using a thermal conductivity meter. On the other hand, the specimen was heated to 200 ° C, and the temperature on the surface side was measured with the surface to which the heat insulating composition of the present invention was applied as the surface side.
(1) When the heat insulating composition of Example 1 was used, the thermal conductivity was 30 mw / mK. As can be seen from FIG. 3, it was well adhered to the steel plate and the temperature on the surface side was measured at 80 ° C.
(2) When the heat insulating composition of Example 2 was used, the thermal conductivity was 28 mW / mK. As shown in FIG. 4, the adhesion to the steel sheet was excellent and the temperature on the surface side was measured at 90 ° C.
(3) When the heat insulating composition of Example 3 was used, the thermal conductivity was 39 mw / mk. Although the thermal conductivity is slightly reduced by the mixing of water glass, since the water glass is an inexpensive binder, it is economically advantageous, and since the water glass is an incombustible inorganic material, the heat resistance temperature of the heat insulating material manufactured using such a heat insulating composition can be higher. The adiabatic composition of Example 3 was excellent in adhesion when applying iron plate, and the temperature on the surface side was measured at 100 캜.
(4) When the heat insulating composition of Example 4 was used, the thermal conductivity was 36 mW / mK. Although the thermal conductivity is slightly reduced by the mixing of the colloidal silica, since the colloidal silica is an inexpensive binder, it is economically advantageous, and since the water glass is an incombustible inorganic material, the heat resistance temperature of the heat insulating material manufactured using such a heat insulating composition is more Can be increased. The adiabatic composition of Example 4 was excellent in adhesion when applied to an iron plate, and the temperature on the surface side was measured at 100 캜.
(5) When the heat insulating composition of Example 5 was used, the thermal conductivity was 68 mw / mk.
(6) On the other hand, when the heat insulating composition of Comparative Example 1 was used, the thermal conductivity was 76 mw / mk. The adiabatic composition of Comparative Example 1 was excellent in adhesion to the steel sheet, but the temperature on the surface side was measured at 130 캜. That is, it was confirmed that an excessive amount of the binder was contained, thereby deteriorating the heat insulating performance.
(7) When the heat insulating composition of Comparative Example 2 was used, the amount of the binder was insufficient and no adhesion to the iron plate was observed.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be obvious to those of ordinary skill in the art.
Claims (20)
In this formula,
R 1 to R 8 are each independently hydrogen, C 1 - it may be selected from the group consisting of from 8 cycloalkyl, - 8 alkyl, aryl, and C 3
n is an integer of 1 to 100,000.
Adding a hydrophobic powder and stirring to obtain an aqueous dispersion mixture; And
Adding a silicone binder to the aqueous dispersion mixture
≪ / RTI >
In this formula,
R 1 to R 8 are each independently hydrogen, C 1 - it may be selected from the group consisting of from 8 cycloalkyl, - 8 alkyl, aryl, and C 3
n is an integer of 1 to 100,000.
A heat insulating composition layer formed on the heat insulating substrate using the heat insulating composition of any one of claims 1 to 9
Lt; / RTI >
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| KR1020130078340A KR101804345B1 (en) | 2013-07-04 | 2013-07-04 | Heat-insulating composition, method for preparing thereof and heat-insulating material using the same |
| PCT/KR2014/005972 WO2015002488A1 (en) | 2013-07-04 | 2014-07-03 | Heat-insulating composition, method of preparing the same, and heat-insulating element using the same |
| CN201480037682.1A CN105452387B (en) | 2013-07-04 | 2014-07-03 | A kind of heat-insulated composite and preparation method thereof and heat insulating element using the heat-insulated composite |
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Cited By (6)
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| KR101645973B1 (en) * | 2016-03-16 | 2016-08-05 | 주식회사 코에원텍 | Aerogel coating solution and thermoduric glass-wool and the producing method thereof |
| WO2018038343A1 (en) * | 2016-08-26 | 2018-03-01 | 알이엠텍 주식회사 | Insulation paste composition, insulation material using same, and method for preparing insulation material |
| KR20200105255A (en) | 2019-02-28 | 2020-09-07 | 한국세라믹기술원 | Insulating material applied to inorganic binder that induces bonding structure at the intersection of the ceramic wool and flame retardant/nonflammable insulation board thereby |
| WO2021181932A1 (en) * | 2020-03-12 | 2021-09-16 | 住友理工株式会社 | Thermal insulation material and method for producing same |
| KR102464654B1 (en) * | 2022-05-23 | 2022-11-09 | 최규술 | Composition for insulation board |
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| US5569513A (en) | 1994-08-10 | 1996-10-29 | Armstrong World Industries, Inc. | Aerogel-in-foam thermal insulation and its preparation |
| ATE479041T1 (en) | 2003-11-12 | 2010-09-15 | Stuart G Burchill Jr | COMPOSITION FOR THERMAL INSULATION LAYER |
| CN101346420B (en) * | 2005-10-21 | 2012-06-13 | 卡伯特公司 | Aerogel based composites |
| KR100869384B1 (en) | 2007-07-09 | 2008-11-19 | 한국생산기술연구원 | Translucent aerogel monolith insulating materials having improved durability and overlap glasses prepared thereof |
| FR2955863B1 (en) | 2010-02-03 | 2012-03-09 | Saint Gobain Rech | HIGH PERFORMANCE THERMAL INSULATION MATERIALS |
| EP2402150B1 (en) | 2010-07-02 | 2013-08-21 | Rockwool International A/S | Insulating construction element, use of an insulating construction element and method for manufacturing an insulating construction element |
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2013
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| KR101645973B1 (en) * | 2016-03-16 | 2016-08-05 | 주식회사 코에원텍 | Aerogel coating solution and thermoduric glass-wool and the producing method thereof |
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| WO2021181932A1 (en) * | 2020-03-12 | 2021-09-16 | 住友理工株式会社 | Thermal insulation material and method for producing same |
| US11655931B2 (en) | 2020-03-12 | 2023-05-23 | Sumitomo Riko Company Limited | Heat insulating material and manufacturing method thereof |
| KR102464654B1 (en) * | 2022-05-23 | 2022-11-09 | 최규술 | Composition for insulation board |
| WO2024014707A1 (en) * | 2022-07-12 | 2024-01-18 | 주식회사 엘지화학 | Composite insulating material comprising super absorbent polymer layer |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015002488A1 (en) | 2015-01-08 |
| CN105452387A (en) | 2016-03-30 |
| KR101804345B1 (en) | 2017-12-06 |
| CN105452387B (en) | 2019-05-17 |
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