Heat-accumulating material, heat-accumulating material composition, and heat-accumulating molded body

Abstract

The present invention provides a heat storage material, a heat storage material composition, and a heat storage molded body, the heat storage material being capable of contributing to excellent heat storage properties, diffusion resistance, and hydrolysis resistance, the heat storage material composition containing the heat storage material and being excellent in curing properties even when the heat storage material is contained in a large proportion, and the heat storage molded body being high in latent heat per unit volume of the molded body, excellent in heat storage properties, and excellent in diffusion resistance and leakage resistance even when exposed to a high-temperature environment. The present invention relates to a heat storage material characterized by containing a saturated fatty acid monoester (A) obtained by reacting a saturated aliphatic monocarboxylic acid having a linear alkyl group with 8 or more and 20 or less carbon atoms with a saturated aliphatic monohydric alcohol having a linear alkyl group with 8 or more and 20 or less carbon atoms.

Description

TECHNICAL FIELD

[0001] The present application relates to a heat-accumulating material, a heat-accumulating material composition, and a heat-accumulating molded body obtained from the heat-accumulating material composition, which are excellent in heat accumulation. BACKGROUND

[0002] In recent years, heat-accumulating technology for effectively using natural energy such as solar energy or geothermal energy, or waste heat from air conditioning equipment or the like, has been attracting attention as one of the technologies for solving energy problems.

[0003] As a heat-accumulating material for such heat-accumulating technology, in particular, an organic latent heat heat-accumulating material that accumulates heat (heat accumulation) when a substance changes from a solid phase to a liquid phase and releases heat (heat release) when the substance changes from a liquid phase to a solid phase is being studied for practical use because of its high latent heat and ease of handling.

[0004] In particular, in recent years, various attempts have been made to further improve heat-accumulating properties.

[0005] As such an organic latent heat heat-accumulating material, for example, Patent Literature 1 discloses a heat-accumulating body using an organic latent heat heat-accumulating material such as methyl stearate or methyl palmitate, and Patent Literature 2 discloses a heat-accumulating microcapsule using a fatty acid ester having a total carbon atom number of 23 or less and a fatty acid ester having a total carbon atom number of 20 or more as an organic latent heat heat-accumulating material.

[0006] However, in the case of a heat-accumulating body using the organic latent heat heat-accumulating material of Patent Literature 1, if the blending ratio of the heat-accumulating material is increased, it can be confirmed that the heat-accumulating properties are improved, but on the other hand, when exposed to a high-temperature environment, there is a tendency for diffusion resistance or leakage resistance to decrease, and it is difficult to simultaneously improve the heat-accumulating properties and the diffusion resistance and the like.

[0007] Furthermore, in the case of the heat-accumulating microcapsule of Patent Literature 2, by encapsulation, it can be confirmed that the diffusion resistance or the leakage resistance is improved, but if the blending ratio of the heat-accumulating material is increased, it can cause problems in terms of solidification when manufacturing a heat-accumulating body or the like.

[0008] When a fatty acid ester as described above is used as an organic latent heat heat-accumulating material, there is a difference between the temperature at which it changes from a solid phase to a liquid phase (melting point) and the temperature at which it changes from a liquid phase to a solid phase (freezing point), and there is a problem in that there is a difference in the temperature region in which the heat-accumulating properties are exhibited when the temperature changes from low to high and when the temperature changes from high to low.

[0009] Furthermore, latent heat heat-accumulating materials are expected to be used as building materials for dwellings or the like, or as materials for transporting food or pharmaceutical products or the like, but in actual use, there is a possibility that they will be exposed to a high-temperature environment, or come into contact with water, and in such cases, there is a possibility that the diffusion resistance will decrease or the heat-accumulating properties will decrease due to hydrolysis, and thus further improvement in performance is desired.

[0010] Prior Art Documents

[0011] Patent Documents

[0012] Patent Document 1: Japanese Patent Application Laid-Open (JP-A) No. 2011-208121

[0013] Patent Document 2: Japanese Patent Application Laid-Open (JP-A) No. 2018-76485 SUMMARY

[0014] Technical Problem to be Solved by the Invention

[0015] Therefore, the present invention has been achieved in order to provide a heat storage material which is useful for exerting excellent heat storage properties, particularly, which is capable of having a melting point close to a freezing point and of exerting excellent heat storage properties, diffusion resistance and hydrolysis resistance at a desired set temperature even against any temperature change from high temperature to low temperature or from low temperature to high temperature; a heat storage material composition containing the heat storage material and which is excellent in curing properties even when the heat storage material is contained in a large proportion, and which is capable of obtaining a heat storage molded body having a high latent heat amount per unit volume of the molded body and excellent heat storage properties; and a heat storage molded body in which the heat storage material is not easily diffused or leaked from the inside even when exposed to a high temperature environment, and which is excellent in diffusion resistance and leakage resistance.

[0016] Technical Means for Solving the Technical Problem

[0017] The present invention has been achieved as a result of intensive studies made in order to solve the above-described technical problem, and it has been found that a heat storage material which is useful for exerting excellent heat storage properties, diffusion resistance and hydrolysis resistance can be obtained by using a heat storage material (organic latent heat storage material) containing a saturated fatty acid monoester having a specific structure; a heat storage material composition containing the heat storage material and which is excellent in curing properties even when the heat storage material is contained in a large proportion, and which is capable of obtaining a heat storage molded body having a high latent heat amount per unit volume of the molded body and excellent heat storage properties; and a heat storage molded body in which the heat storage material is not easily diffused or leaked from the inside even when exposed to a high temperature environment, and which is excellent in diffusion resistance and leakage resistance, and the present invention has thus been completed.

[0018] That is, the present invention relates to a heat storage material characterized by containing a saturated fatty acid monoester (A) obtained by reacting a saturated aliphatic monocarboxylic acid having a linear alkyl group having 8 or more and 20 or less carbon atoms and a saturated aliphatic monohydric alcohol having a linear alkyl group having 8 or more and 20 or less carbon atoms.

[0019] The heat storage material of the present application preferably: the saturated fatty acid monoester (A) contains a saturated fatty acid monoester (A-1) obtained by reacting a saturated aliphatic monocarboxylic acid (a-c) having a linear alkyl group with a carbon atom number (Nc) of 8 or more and 20 or less and a saturated aliphatic monohydric alcohol (a-a) having a linear alkyl group with a carbon atom number (Na) of 8 or more and 20 or less, and satisfies the following formula (1).

[0020] (1) (Nc) < (Na)

[0021] The heat storage material of the present application preferably: the saturated fatty acid monoester (A-1) satisfies the following formula (2).

[0022] (2) 22 ≤ (Nc + Na) ≤ 32

[0023] The heat storage material of the present application preferably: the saturated fatty acid monoester (A-1) satisfies the following formula (3).

[0024] (3) 4 ≤ (Na - Nc) ≤ 8

[0025] The present application relates to a heat storage material composition characterized by containing the heat storage material, a polyol (B), and an isocyanate (C).

[0026] The heat storage material composition of the present application preferably: the polyol (B) contains a polyester polyol (B-1) and a polyether polyol (B-2).

[0027] The heat storage material composition of the present application preferably: the content ratio of the heat storage material in the total amount of the heat storage material composition is 50 mass% or more and 95 mass% or less.

[0028] The heat storage material composition of the present application preferably: the (B-1) component contains a polyester polyol having a number average molecular weight of 1000 or more and 4000 or less and a functional group number of 2 or more and less than 3.

[0029] The heat storage material composition of the present application preferably: the (B-2) component contains a polyether polyol having a number average molecular weight of 1000 or more and 12000 or less and a functional group number of 2 or more and 3 or less.

[0030] The heat storage material composition of the present application preferably: the (C) component contains a trimer of an isocyanate.

[0031] The heat storage material composition of the present application preferably: the mixing ratio of the total amount of the (B-1) component and the (B-2) component to the (C) component is 0.75 or more and 2.2 or less in terms of the NCO / OH ratio.

[0032] The present application relates to a heat accumulating molded body characterized by being formed from the heat accumulating material composition.

[0033] Effects of the Invention

[0034] The heat accumulating material of the present application is useful in that it helps to exhibit excellent heat accumulating properties, can have a melting point close to a freezing point and can exhibit excellent heat accumulating properties at a desired set temperature even against any temperature change from high temperature to low temperature or from low temperature to high temperature, resistance to diffusion and resistance to hydrolysis. In particular, by using a heat accumulating material composition containing the heat accumulating material, the resulting heat accumulating molded body is excellent in curing properties even when the content ratio of the heat accumulating material is high, has a high latent heat amount per unit volume of the molded body and is excellent in heat accumulating properties. Furthermore, even when the heat accumulating molded body is exposed to a high temperature environment, the heat accumulating material is not easily diffused or leaked from the inside, is excellent in resistance to diffusion and resistance to leakage and is very useful. DETAILED DESCRIPTION

[0035] Hereinafter, a mode for carrying out the present application will be described in detail.

[0036] (Heat accumulating material)

[0037] (A) Component

[0038] The present application relates to a heat accumulating material characterized by containing a saturated fatty acid monoester (A) ((A) component) obtained by reacting a saturated aliphatic monocarboxylic acid having a linear alkyl group with a carbon atom number of 8 or more and 20 or less and a saturated aliphatic monohydric alcohol having a linear alkyl group with a carbon atom number of 8 or more and 20 or less. The (A) component functions as a heat accumulating material, is excellent in heat accumulating properties, is not easily diffused even when exposed to a high temperature environment, is excellent in resistance to diffusion, can help to exhibit resistance to hydrolysis and can exhibit excellent heat accumulating properties at a desired set temperature even against any temperature change from high temperature to low temperature or from low temperature to high temperature. Furthermore, it is not easily leaked from a heat accumulating molded body formed from a heat accumulating material composition and is excellent in resistance to leakage.

[0039] (A-1) Component

[0040] Preferably, the (A) component contains a saturated fatty acid monoester (A-1) obtained by reacting a saturated aliphatic monocarboxylic acid (a-c) having a linear alkyl group with a carbon atom number (Nc) of 8 or more and 20 or less, and a saturated aliphatic monohydric alcohol (a-a) having a linear alkyl group with a carbon atom number (Na) of 8 or more and 20 or less, and satisfies the following formula (1). The (A-1) component is preferable because it has excellent heat storage properties, diffusion resistance, and even more excellent hydrolysis resistance, and can exhibit even more excellent heat storage properties at a desired set temperature even with any temperature change from high temperature to low temperature or from low temperature to high temperature. Also, the (A-1) component is not easily leaked from a heat storage molded body formed of a heat storage material composition, and has excellent leakage resistance.

[0041] (1) (Nc) < (Na)

[0042] The heat storage material of the present application is useful because it contains an (A-1) component having a specific range of carbon atom numbers obtained by reacting an (a-c) component having a specific structure, and an (a-a) component having a specific structure, and can have a melting point and a freezing point close to each other, and can exhibit excellent heat storage properties at a desired set temperature even with any temperature change from high temperature to low temperature or from low temperature to high temperature. Also, the (A-1) component can be adjusted to a desired temperature by the combination of the (a-c) component having a specific structure and the (a-a) component, and can exhibit excellent heat storage properties at a pinpoint desired temperature, and is useful. Also, the (A-1) component is not easily diffused even when exposed to a high temperature environment, has excellent diffusion resistance, and has excellent hydrolysis resistance even when water is present. Also, the "desired temperature" is not particularly limited and can be adjusted, and can be set to a temperature range of 10°C to 40°C, or a lower temperature range including a temperature at the freezing point.

[0043] The difference between the melting point and the freezing point of the (A-1) component is preferably less than 2.5°C, more preferably less than 2.0°C, and even more preferably less than 1.0°C. This is preferable because it can have excellent heat storage properties at a desired set temperature even with any temperature change from high temperature to low temperature or from low temperature to high temperature.

[0044] It is preferable that the (A-1) component satisfy the above formula (1) and satisfy the following formula (2). By satisfying the following formula (2), if the total number of carbon atoms (Nc+Na) is within the range, the heat storage property, the diffusion resistance, and the hydrolysis resistance are more excellent, and further, the heat storage property at a desired set temperature is more excellent even against any temperature change from high temperature to low temperature and from low temperature to high temperature, and further, the compatibility with the (B-1) component and the (B-2) component described later is excellent, the formability and the curing property at the time of forming the heat storage molded body are excellent, the retention in the inside of the heat storage molded body is easy, the diffusion resistance, the leakage resistance, and the heat storage material transfer prevention property are more excellent, and thus, it is preferable.

[0045] (2) 22 ≤ (Nc+Na) ≤ 32

[0046] Further, the melting point, the freezing point, the phase change temperature, and the latent heat amount of the (A-1) component and the like saturated fatty acid monoester can be measured by a differential scanning calorimeter (DSC7000X manufactured by Hitachi High-Tech Science Corporation).

[0047] Further, as the measurement conditions, the melting point (°C), the freezing point (°C), the freezing latent heat amount (J / g), and the melting latent heat amount (J / g) are measured at a temperature range of -40°C to 60°C at a temperature increase / decrease rate of 10°C / minute. The phase change temperature is the average of the freezing point (°C) and the melting point (°C), and the latent heat amount is the average of the freezing latent heat amount (J / g) and the melting latent heat amount (J / g).

[0048] It is preferable that the (A-1) component satisfy the above formula (1) and satisfy the following formula (3). By satisfying the following formula (3), the melting point and the freezing point are made closer, and thus, the heat storage property at a desired set temperature is more excellent, and the hydrolysis resistance is improved, and thus, it is useful.

[0049] (3) 4 ≤ (Na-Nc) ≤ 8

[0050] Further, the (A-1) component is preferable in that the number of carbon atoms (Nc) is 8 or more and 16 or less, and the number of carbon atoms (Na) is 12 or more and 20 or less, and further, it is more preferable in that the following formula (2') and / or the following formula (3) are satisfied in addition to the above formula (1), and further, it is preferable in that the following formulas (1), (2'), and (3) are satisfied at the same time. By satisfying the following formulas, the heat storage property at a desired set temperature is more excellent. In particular, by satisfying the following formula (2'), the diffusion resistance, the leakage resistance, and the heat storage material transfer prevention property are more excellent, and by satisfying the following formula (3), the melting point and the freezing point are made closer, and the hydrolysis resistance is improved, and thus, it is useful.

[0051] (1) (Nc) < (Na)

[0052] (2') 24 ≤ (Nc + Na) ≤ 30

[0053] (3) 4 ≤ (Na - Nc) ≤ 8

[0054] The content of the (A-1) component is preferably more than 10 mass%, more preferably more than 30 mass%, further preferably more than 50 mass%, and particularly preferably more than 70 mass%, relative to 100 mass% of the total amount of the heat storage material. Furthermore, the upper limit is preferably 100 mass%. By making the (A-1) component more than 10 mass% in the heat storage material, the difference between the melting point and the freezing point can be suppressed to be small, and the heat storage property becomes excellent, and thus it is preferable.

[0055] (A-2) component

[0056] In the heat storage material of the present application, it is preferable that the saturated fatty acid monoester (A) contains a saturated fatty acid monoester (A-2) ((A-2) component) obtained by reacting a saturated aliphatic monocarboxylic acid (a-c) having a linear alkyl group with a carbon atom number (Nc) of 8 or more and 20 or less and a saturated aliphatic monohydric alcohol (a-a) having a linear alkyl group with a carbon atom number (Na) of 8 or more and 20 or less, and satisfying the following formula (4). By making the (A-2) component satisfy the following formula (4), the heat storage property and the diffusion resistance are excellent, and thus it is preferable. Furthermore, by further satisfying the following formula (4'), the (A-2) component can further exert the above-mentioned effects, and thus it is more preferable.

[0057] (4) (Nc) ≥ (Na)

[0058] (4') (Nc) > (Na)

[0059] It is preferable that the (A-2) component satisfy the above-mentioned formula (4) and satisfy the following formula (2). By making the (A-2) component satisfy the following formula (2), the heat storage property and the diffusion resistance are more excellent, and thus it is preferable.

[0060] (2) 22 ≤ (Nc + Na) ≤ 32

[0061] The heat storage material composition of the present application can use only one kind of (A) component as the heat storage material, or can use two or more kinds of (A) components in combination. When two or more kinds of (A) components are used in combination, it is useful to easily adjust the temperature setting in the temperature region that is difficult to adjust with only one kind of (A) component.

[0062] Further, in the present application, in relation to only one of the (A-1) component, it is preferable to use two or more of the (A-1) components in combination, or to use the (A-2) component in admixture with the (A-1) component, whereby desired temperature setting becomes easy, the difference between the melting point and the freezing point can be adjusted, and excellent heat storage properties can be exhibited at a desired set temperature.

[0063] Further, when the (A-2) component is used in admixture with the (A-1) component, in the case where the mixing ratio (molar ratio) of the (A-1) component to the (A-2) is [(A-1) : (A-2)] = [p : q], it is preferable to satisfy both the following formula (1) and the following formula (5). By satisfying the following formula (5), when temperature adjustment is performed at a desired temperature setting, the melting point and the freezing point can be made close to each other, and excellent hydrolysis resistance is obtained, which is useful.

[0064] (1) (Nc) < (Na)

[0065] (5) {(Nc) of the (A-1) component x [p / (p+q)] + (Nc) of the (A-2) component x [q / (p+q)]} < {(Na) of the (A-1) component x [p / (p+q)] + (Na) of the (A-2) component x [q / (p+q)]}

[0066] The (A-2) component preferably further satisfies at least one, further two or more, of the following formula (2') in addition to satisfying formula (4). By satisfying the following formula, it becomes easy to set to a desired temperature, and as the heat storage material composition, the difference between the melting point and the freezing point can be suppressed, and excellent heat storage properties can be exhibited at a desired set temperature.

[0067] (2') 24 ≤ (Nc+Na) ≤ 30

[0068] (a-c) component

[0069] The (a-c) component is a saturated aliphatic monocarboxylic acid having a linear alkyl group with a carbon atom number (Nc) of 8 or more and 20 or less, preferably a saturated aliphatic monocarboxylic acid having a linear alkyl group with a carbon atom number (Nc) of 8 or more and 16 or less, and more preferably a saturated aliphatic monocarboxylic acid having a linear alkyl group with a carbon atom number (Nc) of 10 or more and 14 or less.

[0070] As the (a-c) component, for example, n-octanoic acid, n-nonanoic acid, n-decanoic acid, n-undecanoic acid, n-dodecanoic acid, n-tridecanoic acid, n-tetradecanoic acid, n-pentadecanoic acid, n-hexadecanoic acid, n-heptadecanoic acid, n-octadecanoic acid, n-nonadecanoic acid, n-eicosanoic acid, and the like can be exemplified, and one or two or more of these can be used.

[0071] (a-a) component

[0072] The (a-a) component is a saturated aliphatic monohydric alcohol having a linear alkyl group with a carbon atom number (Na) of 8 or more and 20 or less, preferably a saturated aliphatic monohydric alcohol having a linear alkyl group with a carbon atom number (Na) of 10 or more and 20 or less, more preferably a saturated aliphatic monohydric alcohol having a linear alkyl group with a carbon atom number (Na) of 10 or more and 18 or less.

[0073] As the (a-a) component, for example, 1-octanol, 1-nonanol, 1-decanol, 1-undecanol, 1-dodecanol, 1-tridecanol, 1-tetradecanol, 1-pentadecanol, 1-hexadecanol, 1-heptadecanol, 1-octadecanol, 1-nonadecanol, 1-icosanol, and the like can be given, and one or two or more of these can be used.

[0074] The total number of the carbon atom number (Nc) of the linear alkyl group of the (a-c) component and the carbon atom number (Na) of the linear alkyl group of the (a-a) component is preferably 20 or more and 32 or less, more preferably 22 or more and 32 or less, and further preferably 24 or more and 32 or less. If the total number of the carbon atom number (Nc+Na) is within the range, the heat storage property, the diffusion resistance are excellent, and in addition, the compatibility with the (B-1) component and the (B-2) component described later is excellent, the formability and the curing property at the time of forming the heat storage molded body are excellent, and it is easy to be held or retained in the inside of the molded body, and the diffusion resistance and the leakage resistance are more excellent, and thus it is preferred.

[0075] As the (A-1) component, for example, nonyl octanoate, decyl octanoate, undecyl octanoate, dodecyl octanoate, tridecyl octanoate, tetradecyl octanoate, pentadecyl octanoate, hexadecyl octanoate, heptadecyl octanoate, octadecyl octanoate, nonadecyl octanoate, icosyl octanoate,

[0076] decyl nonanoate, undecyl nonanoate, dodecyl nonanoate, tridecyl nonanoate, tetradecyl nonanoate, pentadecyl nonanoate, hexadecyl nonanoate, heptadecyl nonanoate, octadecyl nonanoate, nonadecyl nonanoate, icosyl nonanoate,

[0077] undecyl decanoate, dodecyl decanoate, tridecyl decanoate, tetradecyl decanoate, pentadecyl decanoate, hexadecyl decanoate, heptadecyl decanoate, octadecyl decanoate, nonadecyl decanoate, icosyl decanoate,

[0078] dodecyl undecanoate, tridecyl undecanoate, tetradecyl undecanoate, pentadecyl undecanoate, hexadecyl undecanoate, heptadecyl undecanoate, octadecyl undecanoate, nonadecyl undecanoate, icosyl undecanoate,

[0079] tridecyl dodecanoate, tetradecyl dodecanoate, pentadecyl dodecanoate, hexadecyl dodecanoate, heptadecyl dodecanoate, octadecyl dodecanoate, nonadecyl dodecanoate, icosyl dodecanoate,

[0080] tridecyl tridecanoate, pentadecyl tridecanoate, hexadecyl tridecanoate, heptadecyl tridecanoate, octadecyl tridecanoate, nonadecyl tridecanoate, icosyl tridecanoate,

[0081] tridecyl tridecanoate, pentadecyl tridecanoate, hexadecyl tridecanoate, heptadecyl tridecanoate, octadecyl tridecanoate, nonadecyl tridecanoate, icosyl tridecanoate,

[0082] tridecyl tridecanoate, pentadecyl tridecanoate, hexadecyl tridecanoate, heptadecyl tridecanoate, octadecyl tridecanoate, nonadecyl tridecanoate, icosyl tridecanoate,

[0083] tridecyl tridecanoate, pentadecyl tridecanoate, hexadecyl tridecanoate, heptadecyl tridecanoate, octadecyl tridecanoate, nonadecyl tridecanoate, icosyl tridecanoate,

[0084] tridecyl tridecanoate, pentadecyl tridecanoate, hexadecyl tridecanoate, heptadecyl tridecanoate, octadecyl tridecanoate, nonadecyl tridecanoate, icosyl tridecanoate,

[0085] tridecyl tridecanoate, pentadecyl tridecanoate, hexadecyl tridecanoate, heptadecyl tridecanoate, octadecyl tridecanoate, nonadecyl tridecanoate, icosyl tridecanoate,

[0086] tridecyl tridecanoate, pentadecyl tridecanoate, hexadecyl tridecanoate, heptadecyl tridecanoate, octadecyl tridecanoate, nonadecyl tridecanoate, icosyl tridecanoate,

[0087] tridecyl tridecanoate, pentadecyl tridecanoate, hexadecyl tridecanoate, heptadecyl tridecanoate, octadecyl tridecanoate, nonadecyl tridecanoate, icosyl tridecanoate,

[0088] octyl octanoate,

[0089] octyl nonanoate, nonyl nonanoate,

[0090] octyl decanoate, nonyl decanoate, decyl decanoate,

[0091] octyl undecanoate, nonyl undecanoate, decyl undecanoate, undecyl undecanoate,

[0092] octyl dodecanoate, nonyl dodecanoate, decyl dodecanoate, undecyl dodecanoate, dodecyl dodecanoate,

[0093] octyl tridecanoate, nonyl tridecanoate, decyl tridecanoate, undecyl tridecanoate, dodecyl tridecanoate, tridecyl tridecanoate,

[0094] octyl tetradecanoate, nonyl tetradecanoate, decyl tetradecanoate, undecyl tetradecanoate, dodecyl tetradecanoate, tridecyl tetradecanoate, tetradecyl tetradecanoate, octyl pentadecanoate, nonyl pentadecanoate, decyl pentadecanoate, undecyl pentadecanoate, dodecyl pentadecanoate, tridecyl pentadecanoate, tetradecyl pentadecanoate, pentadecyl pentadecanoate,

[0095] octyl hexadecanoate, nonyl hexadecanoate, decyl hexadecanoate, undecyl hexadecanoate, dodecyl hexadecanoate, tridecyl hexadecanoate, tetradecyl hexadecanoate, pentadecyl hexadecanoate, hexadecyl hexadecanoate,

[0096] octyl heptadecanoate, nonyl heptadecanoate, decyl heptadecanoate, undecyl heptadecanoate, dodecyl heptadecanoate, tridecyl heptadecanoate, tetradecyl heptadecanoate, pentadecyl heptadecanoate, hexadecyl heptadecanoate, heptadecyl heptadecanoate,

[0097] octyl octadecanoate, nonyl octadecanoate, decyl octadecanoate, undecyl octadecanoate, dodecyl octadecanoate, tridecyl octadecanoate, tetradecyl octadecanoate, pentadecyl octadecanoate, hexadecyl octadecanoate, heptadecyl octadecanoate, octadecyl octadecanoate,

[0098] octyl nonadecanoate, nonyl nonadecanoate, decyl nonadecanoate, undecyl nonadecanoate, dodecyl nonadecanoate, tridecyl nonadecanoate, tetradecyl nonadecanoate, pentadecyl nonadecanoate, hexadecyl nonadecanoate, heptadecyl nonadecanoate, octadecyl nonadecanoate, nonadecyl nonadecanoate,

[0099] octyl eicosanoate, nonyl eicosanoate, decyl eicosanoate, undecyl eicosanoate, dodecyl eicosanoate, tridecyl eicosanoate, tetradecyl eicosanoate, pentadecyl eicosanoate, hexadecyl eicosanoate, heptadecyl eicosanoate, octadecyl eicosanoate, nonadecyl eicosanoate, eicosyl eicosanoate, and the like, of which one or more kinds can be used.

[0100] The (A) component can be produced by a general esterification reaction and a transesterification reaction. Further, after esterification, as needed, in order to remove unreacted saturated aliphatic monocarboxylic acid or saturated aliphatic monoalcohol, and the like, a known purification method such as a reduced pressure distillation, a water washing treatment after alkali neutralization, an adsorption treatment using activated clay and synthetic adsorbents, or steaming, and the like can be performed.

[0101] From the viewpoint of heat storage, the lower limit value of the latent heat amount of the (A) component (monomer) is preferably 120 J / g or greater, more preferably 150 J / g or greater, and the upper limit value of the latent heat amount of the (A) component (monomer) is preferably 260 J / g or less, more preferably 250 J / g or less.

[0102] From the viewpoint of hydrolysis resistance, the acid value of the (A) component (monomer) is preferably 1 mgKOH / g or less, more preferably 0.5 mgKOH / g or less, and further preferably 0.1 mgKOH / g or less.

[0103] From the viewpoint of heat storage at a desired set temperature, the hydroxyl value of the (A) component (monomer) is preferably 2 mgKOH / g or less, more preferably 1 mgKOH / g or less, and further preferably 0.5 mgKOH / g or less.

[0104] In the present application, other heat storage materials can be mixed at the same time as the (A) component, as long as the characteristics of the present application are not impaired.

[0105] As the other heat storage materials, fatty acid esters other than the (A) component, fatty acids, aliphatic hydrocarbons, aliphatic alcohols, and the like can be exemplified.

[0106] As the fatty acid esters other than the (A) component, for example, fatty acid esters formed from the (a-c) component and an alcohol other than the (a-a) component, fatty acid esters formed from a carboxylic acid other than the (a-c) component and the (a-a) component, fatty acid esters formed from a carboxylic acid other than the (a-c) component and an alcohol other than the (a-a) component, and the like can be exemplified.

[0107] As the carboxylic acid other than the (a-c) component, for example, a monocarboxylic acid having a linear alkyl group with a carbon number of 1 or greater and 7 or less, a monocarboxylic acid having a linear alkyl group with a carbon number of 21 or greater and 30 or less, a monocarboxylic acid having a branched alkyl group with a carbon number of 3 or greater and 30 or less, a polycarboxylic acid having an alkyl group with a carbon number of 2 or greater and 30 or less, an unsaturated carboxylic acid having an alkyl group with a carbon number of 4 or greater and 30 or less, and the like can be exemplified.

[0108] As the alcohol other than the (a-a) component, for example, a monohydric alcohol having a linear alkyl group with a carbon number of 1 or greater and 7 or less, a monohydric alcohol having a linear alkyl group with a carbon number of 21 or greater and 30 or less, a monohydric alcohol having a branched alkyl group with a carbon number of 3 or greater and 30 or less, a polyhydric alcohol having an alkyl group with a carbon number of 2 or greater and 30 or less, an unsaturated alcohol having an alkyl group with a carbon number of 4 or greater and 30 or less, and the like can be exemplified.

[0109] Further, the content ratio of the (A) component with respect to the total amount of the heat storage material composition is preferably 50% by mass or more and 90% by mass or less, more preferably 60% by mass or more and 85% by mass or less, further preferably 70% by mass or more and 80% by mass or less, particularly preferably 70% by mass or more and 78% by mass or less. If the content ratio of the (A) component is within the range, the (A) component is excellent in the carrying or holding property even when a heat storage material composition containing a very large amount of the (A) component is used, is excellent in the formability, the curability at the time of forming a heat storage molded body, the leakage resistance, and the obtained heat storage molded body can have excellent heat storage property and is useful.

[0110] (Heat storage material composition)

[0111] The present application relates to a heat storage material composition characterized by containing a heat storage material containing the (A) component, a polyol (B), and an isocyanate (C). The heat storage material composition can form a heat storage molded body in a state where the heat storage material containing the (A) component enters a three-dimensional network structure formed by the reaction of the polyol (B) and the isocyanate (C), thereby carrying or holding the heat storage material containing the (A) component, and the heat storage material containing the (A) component is not easily diffused or leaked even when exposed to a high-temperature environment, is excellent in the diffusion resistance and the leakage resistance, and is therefore preferred.

[0112] (B) component

[0113] As the polyol (B), for example, a polyester polyol, a polyether polyol, an acrylic polyol, a polycarbonate polyol, a polyolefin polyol, a polycaprolactone polyol, a polytetramethylene glycol polyol, a polybutadiene polyol, a polyoxypropylene polyol, a polyoxypropylene ethylene polyol, an epoxy polyol, an alkyd polyol, a fluorine-containing polyol, a silicon-containing polyol, cellulose and / or a derivative thereof, a polysaccharide such as amylose, and the like can be exemplified, and one or two or more kinds of these can be used.

[0114] In the present application, it is particularly preferred that the polyol (B) contains a polyester polyol (B-1) and / or a polyether polyol (B-2). Such a polyol (B) is excellent in the curability and easily carries or holds the heat storage material uniformly in the three-dimensional network structure, and is therefore preferred.

[0115] (B-1) component

[0116] It is preferable that the polyol (B) contains a polyester polyol (B-1) (a (B-1) component). The (B-1) component is a component that reacts with the isocyanate (C) described later to form a three-dimensional network structure. In particular, by containing the (B-1) component, the heat storage material containing the (A) component is excellent in the carrying or holding property, and the diffusion resistance and the leakage resistance based on the heat storage material containing the (A) component can be improved.

[0117] As the (B-1) component, for example, a polycondensate of a polyol and a polycarboxylic acid; a polycondensate of a polyol and a hydroxycarboxylic acid; a ring-opening polymer of a cyclic ester (lactone); a reaction product formed based on three or more kinds of components among a polyol, a polycarboxylic acid, a hydroxycarboxylic acid, and a cyclic ester; castor oil or a modified product thereof; and the like can be exemplified.

[0118] As the polyhydric alcohol, for example, ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, 1,2-pentanediol, 1,3-pentanediol, 1,4-pentanediol, 1,5-pentanediol, 1,3-tetramethylene glycol, 1,4-tetramethylene glycol, 1,2-hexanediol, 1,4-hexanediol, 1,5-hexanediol, 1,6-hexanediol, 1,3-tetramethylene glycol, 1,4-dimethylolhexane, 2-methyl-1,3-trimethylene glycol, 1,5-pentamethylene glycol, trimethyl pentanediol, 2,2,4-trimethyl-1,3-pentanediol, neopentyl glycol, cyclohexanediol, 2-methyl-1,3-propanediol, 2,2-dimethyl-1,3-propanediol, 2,2-diethyl-1,3-propanediol, 2-methyl-2-propyl-1,3-propanediol, 2-butyl-2-ethyl-1,3-propanediol, 2-methyl-1,4-butanediol, 1,6-hexamethylene glycol, 3-methyl-1,5-pentamethylene glycol, 2,4-diethyl-1,5-pentamethylene glycol, 2-ethyl-1,3-hexanediol, 1,2-octanediol, 1,8-octanediol, 2-methyl-1,8-octanediol, 1,9-nonanediol, 1,2-decanediol, 1,10-decanediol, 1,11-undecanediol, 1,2-dodecanediol, 1,12-dodecanediol, 1,13-tridecanediol, 1,14-tetradecanediol, 1,16-hexadecanediol, 1,18-octadecanediol, 1,12-octadecanediol, 1,20-eicosanediol, m-xylenediol, p-xylenediol, dihydroxyethoxybenzene, bis-hydroxyethylterephthalate, glycerol, diglycerol, trimethylolpropane, bis(trimethylol)propane, trimethylolethane, cyclohexanediols (1,4-cyclohexanediol, cyclohexanedimethanol, etc.), bisphenols (bisphenol A, etc.), sugar alcohols (xylitol or sorbitol, etc.), pentaerythritol, di-pentaerythritol, 2-hydroxymethylpropanediol, ethoxylated trimethylolpropane, etc., or a condensate thereof, etc., or one or two or more kinds thereof can be used.

[0119] As the polycarboxylic acid, for example, malonic acid, maleic acid, maleic anhydride, succinic acid, glutaric acid, adipic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, tridecanedioic acid, tetradecanedioic acid, pentadecanedioic acid, hexadecanedioic acid, octadecanedioic acid, nonadecanedioic acid, etc., aliphatic dicarboxylic acids, 1,4-cyclohexanedicarboxylic acid, etc., alicyclic dicarboxylic acids, terephthalic acid, isophthalic acid, phthalic acid, phthalic anhydride, terephthalic acid, 2,6-naphthalene dicarboxylic acid, p-phenylene dicarboxylic acid, trimellitic acid, etc., aromatic dicarboxylic acids,

[0120] Dimer to hexamer of unsaturated fatty acids such as palmitoleic acid, oleic acid, linoleic acid, linolenic acid, eicosapentaenoic acid, coconut oil fatty acid, palm oil fatty acid, soybean oil fatty acid, hydrogenated soybean oil fatty acid, linseed oil fatty acid, safflower fatty acid, tung oil fatty acid, tall oil fatty acid, dehydrated castor oil fatty acid, castor oil fatty acid, grape seed oil fatty acid, black cumin oil fatty acid, pumpkin kernel oil fatty acid, borage oil fatty acid, wheat germ oil fatty acid, rice bran oil fatty acid, peanut oil fatty acid, rapeseed oil fatty acid, sunflower oil fatty acid, corn oil fatty acid, cottonseed oil fatty acid, peanut kernel fatty acid, almond oil fatty acid, pistachio oil fatty acid, olive oil fatty acid, macadamia nut oil fatty acid, avocado oil fatty acid, sea buckthorn oil fatty acid, sesame oil fatty acid, hemp oil fatty acid, hazelnut oil fatty acid, meadowfoam oil fatty acid, wild rose oil fatty acid, safflower oil fatty acid, walnut oil fatty acid, etc. can be used, alone or in combination of two or more of them.

[0121] As the hydroxycarboxylic acid, for example, 2-hydroxybutyric acid, 2-hydroxyvaleric acid, 3-hydroxyvaleric acid, 3-hydroxyhexanoic acid, 2-hydroxyheptanoic acid, 3-hydroxyheptanoic acid, 2-hydroxyoctanoic acid, 3-hydroxyoctanoic acid, 4-hydroxynonanoic acid, 3-hydroxydecanoic acid, 3-hydroxydodecanoic acid, 5-hydroxydodecanoic acid, 3-hydroxytridecanoic acid, 6-hydroxytetradecanoic acid, 2-hydroxypentadecanoic acid, 10-hydroxyhexadecanoic acid, 11-hydroxyheptadecanoic acid, 10-hydroxyoctadecanoic acid, 12-hydroxyoctadecanoic acid, 10-hydroxynonadecanoic acid, 2-hydroxyeicosanoic acid, 2-hydroxytetracosanoic acid, ricinoleic acid, elaeostearic acid, cerebric acid, leucine, salicylic acid, glyceric acid, 3-hydroxypropionic acid, 5-hydroxyvaleric acid, 6-hydroxyhexanoic acid, 7-hydroxyheptanoic acid, 8-hydroxyoctanoic acid, 9-hydroxynonanoic acid, 10-hydroxydecanoic acid, 11-hydroxyundecanoic acid, 12-hydroxydodecanoic acid, 15-hydroxypentadecanoic acid, 16-hydroxyhexadecanoic acid, 19-hydroxy-nonadecanoic acid, 22-hydroxybehenic acid, mevalonic acid, pantoic acid, castor oil fatty acid, dehydrated castor oil fatty acid, etc., or a polycondensate of these acids, etc. can be used, alone or in combination of two or more of them.

[0122] In the ring-opening polymer of the cyclic ester, as the cyclic ester, for example, propiolactone, β-methyl-δ-valerolactone, ε-caprolactone, etc. can be exemplified.

[0123] The method for producing the polyester polyol can be performed by a conventional method, and a known curing agent, curing catalyst, etc. can be used as needed. In the present application, as the component constituting the polyester polyol, it is particularly preferable to contain one or more selected from the group consisting of a polyol having an alkyl chain segment having 16 or more and 20 or less carbon atoms, a polycarboxylic acid, and a hydroxycarboxylic acid, having 14 or more and 22 or less carbon atoms.

[0124] Further, as the polyhydric alcohol, a dihydric or trihydric alcohol is preferably used. Further, as the polycarboxylic acid, a dihydric or trihydric carboxylic acid is preferably used.

[0125] The number average molecular weight (Mn) of the (B-1) component is preferably 1000 or more and 4000 or less, more preferably 1500 or more and 3500 or less, and further preferably 1800 or more and 3500 or less. By setting the number average molecular weight of the (B-1) component within the range, the curability is excellent and the heat accumulating material containing the (A) component is easily held or maintained uniformly within the three-dimensional network structure, and thus it is preferable.

[0126] The number of functional groups of the (B-1) component is preferably 2 or more and less than 3, and more preferably 2 or more and 2.5 or less. By setting the number of functional groups of the (B-1) component within the range, the curability is excellent and the heat accumulating material containing the (A) component is easily held or maintained uniformly within the three-dimensional network structure, and thus it is preferable. Further, the number of functional groups of the (B-1) component is an average value per 1 molecule of the number of hydroxyl groups.

[0127] (B-2) component

[0128] It is preferable that the polyhydric alcohol (B) contains a polyether polyol (B-2) ((B-2) component). The (B-2) component is a component that forms a three-dimensional network structure by reacting with the isocyanate (C) described later. In particular, the (B-2) component is easy to hold or maintain the heat accumulating material containing the (A) component uniformly within the three-dimensional network structure while forming a three-dimensional network structure that is excellent in curability and more robust, and enables the holding or maintenance even if the heat accumulating material containing the (A) component is in a high content.

[0129] As the (B-2) component, in addition to polyalkylene glycols such as polyethylene glycol, polypropylene glycol, polybutylene glycol, polyethylene glycol monoalkyl ether, polypropylene glycol monoalkyl ether, etc., there are, for example, copolymers containing a plurality of alkylene oxides as monomer components (alkylene oxide-another alkylene oxide) such as an ethylene oxide-propylene oxide copolymer, a bisphenol A type polyether polyol obtained by adding alkylene oxides (at least one or more kinds of ethylene oxide, propylene oxide, etc. Hereinafter the same.) to bisphenol A as an initiator, an aromatic amine type polyether polyol obtained by adding alkylene oxides to an aromatic amine (for example, toluene diamine, diethyl toluene diamine, 4,4'-diamino diphenyl methane, p-phenylene diamine, o-phenylene diamine, naphthalene diamine, triethanol amine, a Mannich condensate, etc.) as an initiator, a polyether polyol obtained by adding alkylene oxides to glycerin as an initiator, an amino group-containing polyether polyol obtained by adding alkylene oxides to a low molecular weight amine (for example, ethylene diamine, propylene diamine, butylene diamine, hexamethylene diamine, neopentyl diamine, etc.) as an initiator, etc.

[0130] The number average molecular weight (Mn) of the (B-2) component is preferably 1,000 or more and 12,000 or less, more preferably 1,000 or more and 10,000 or less, further preferably 2,000 or more and 8,000 or less, and particularly preferably 3,000 or more and 7,000 or less. By setting the number average molecular weight of the (B-2) component within the range, the curability is more excellent, and thus is preferred.

[0131] The number of functional groups of the (B-2) component is preferably 2 or more and 3 or less, more preferably 2 or more and less than 3, and further preferably 2 or more and 2.5 or less. By setting the number of functional groups of the (B-2) component within the range, the curability is more excellent, and thus is preferred. In addition, the number of functional groups of the (B-2) component is an average value per 1 molecule of the number of hydroxyl groups.

[0132] The contained ratio (mass ratio) of the (B-1) component to the (B-2) component is preferably (B-1) component : (B-2) component = 50 : 50 to 100 : 0, more preferably 50 : 50 to 99 : 1, and further preferably 55 : 45 to 95 : 5, and particularly preferably 60 : 40 to 85 : 15. By setting the contained ratio of the (B-1) component to the (B-2) component within the range, the formability and curability are more excellent, and thus is preferred.

[0133] In the present application, a polyol other than the (B-1) component and the (B-2) component can be used as long as it is within a range not impairing the characteristics of the present application.

[0134] As the polyol other than the (B-1) component and the (B-2) component, for example, an acrylic polyol, a polycarbonate polyol, a polyolefin polyol, a polycaprolactone polyol, a polybutylene glycol polyol, a polybutadiene polyol, a polyoxypropylene polyol, a polyoxypropylene ethylene polyol, an epoxy polyol, an alkyd polyol, a fluorine-containing polyol, a silicon-containing polyol, cellulose and / or a derivative thereof, a polysaccharide such as amylose, and the like can be exemplified.

[0135] As the polyolefin polyol, a polyol having a skeleton (or main chain) of a polymer or copolymer of an olefin and having at least 2 hydroxyl groups in the molecule (particularly, at the terminal) and a number average molecular weight (Mn) of 1,500 or more can be used. As the olefin, an olefin having a carbon-carbon double bond at the terminal (for example, ethylene, propylene, and the like, α-olefins, and the like) can be used, or an olefin having a carbon-carbon double bond at a site other than the terminal (for example, isobutylene, and the like) can be used, and further, a diene (for example, butadiene, isoprene, and the like) can be used.

[0136] (C) component

[0137] It is preferable that the heat accumulating material composition of the present application contain the isocyanate (the (C) component). The (C) component forms a three-dimensional network structure together with the (B) component described above, and thus it is possible to form a heat accumulating molded body in a state in which the heat accumulating material containing the (A) component is incorporated into the network structure, thereby supporting or holding the heat accumulating material containing the (A) component. Even when exposed to a high temperature environment, the heat accumulating material containing the (A) component is not easily diffused or leaked, and is excellent in diffusion resistance and leakage resistance, and is useful.

[0138] As the (C) component, it is an isocyanate, and there is no limitation as long as it has an isocyanate group, but it is preferable that the isocyanate group be two or more per molecule, and more preferably two or more per 2.2 molecules. As the isocyanate, for example, 1,3-trimethylene diisocyanate, 1,4-tetramethylene diisocyanate, 1,3-pentamethylene diisocyanate, 1,5-pentamethylene diisocyanate, 1,6-hexamethylene diisocyanate (HMDI), 1,2-propylene diisocyanate, 1,2-butylene diisocyanate, 2,3-butylene diisocyanate, 1,3-butylene diisocyanate, 2-methyl-1,5-pentamethylene diisocyanate, 3-methyl-1,5-pentamethylene diisocyanate, 2,4,4-trimethyl-1,6-hexamethylene diisocyanate, 2,2,4-trimethyl-1,6-hexamethylene diisocyanate, 2,6-diisocyanatohexyl methyl carbonate, lysine diisocyanate, dimer acid diisocyanate, norbornene diisocyanate, and the like aliphatic diisocyanates;

[0139] 1,3-cyclopentane diisocyanate, 1,4-cyclohexane diisocyanate, 1,3-cyclohexane diisocyanate, 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate, 4,4'-methylenebis(cyclohexyl isocyanate), methyl-2,4-cyclohexane diisocyanate, methyl-2,6-cyclohexane diisocyanate, 1,3-bis(isocyanatomethyl)cyclohexane, 1,4-bis(isocyanatomethyl)cyclohexane, isophorone diisocyanate (IPDI), norbornene diisocyanate, dicyclohexylmethane diisocyanate, hydrogenated diphenylmethane diisocyanate, hydrogenated xylylene diisocyanate, and the like alicyclic diisocyanates;

[0140] m-phenylene diisocyanate, p-phenylene diisocyanate, 2,4-toluene diisocyanate (TDI), 2,6-toluene diisocyanate (TDI), 1,4-naphthalene diisocyanate, 1,5-naphthalene diisocyanate, 4,4'-diphenyl diisocyanate, 4,4'-diphenylmethane diisocyanate (MDI), 2,4'-diphenylmethane diisocyanate, 4,4'-diphenyl ether diisocyanate, 2-nitrodiphenyl-4,4'-diisocyanate, 2,2'-diphenylpropane-4,4'-diisocyanate, 3,3'-dimethyldiphenylmethane-4,4'-diisocyanate, 4,4'-diphenylpropane diisocyanate, 3,3'-dimethoxydiphenyl-4,4'-diisocyanate, dianisidine diisocyanate, tetramethylene benzylene diisocyanate, and the like aromatic diisocyanates;

[0141] 1,3-xylylene diisocyanate (XDI), 1,4-xylylene diisocyanate (XDI), ω,ω'-diisocyanate 1,4-diethylbenzene, 1,3-bis(1-isocyanato 1-methylethyl)benzene, 1,4-bis(1-isocyanato 1-methylethyl)benzene, 1,3-bis(α,α-dimethylisocyanato methyl)benzene, and the like aromatic aliphatic diisocyanates; and the like, and substances obtained by derivative of these isocyanates by allophanate, biuret, dimerization (uretdione), trimerization (isocyanurate), addition, carbodiimide reaction, and the like, and mixtures thereof, and reaction products thereof with compounds that can react with isocyanate compounds, and the like.

[0142] As the (C) component, a trimer obtained by trimerization (isocyanurate) of isocyanate is preferably contained. By using the trimer, it is easier to form a three-dimensional network structure together with the (B) component, and the effect of the present application can be further improved.

[0143] The heat storage material composition of the present application contains a heat storage material containing the (A) component, the (B) component, and the (C) component, and a heat storage molded body can be obtained by curing by reaction of the (B) component and the (C) component.

[0144] For the heat storage material composition of the present application, it is preferable to first mix the heat storage material containing the (A) component and the (B) component, and then mix the (C) component, and cure by reaction, thereby obtaining a heat storage molded body.

[0145] For the heat storage material composition of the present application, the mixing ratio of the (B) component to the (C) component is preferably 0.75 or more and 2.2 or less, more preferably 0.9 to 2.1, further preferably 1.05 or more and 2.0 or less, in terms of the NCO / OH ratio (equivalent ratio). If the NCO / OH ratio is within the range, the formability and the curability are excellent, and it is easy to form a more robust three-dimensional network structure, and it is useful to easily support or hold the heat storage material containing the (A) component uniformly within the three-dimensional network structure.

[0146] In addition to the heat storage material containing the (A) component and the like, the heat storage material composition of the present application can contain, for example, a layered clay mineral, a surfactant, a heat-conducting substance, a compatibilizer, a reaction accelerator, a flame retardant, a pigment, an aggregate, a viscosity modifier, a plasticizer, a buffering agent, a dispersant, a crosslinking agent, a pH adjustor, a preservative, an antifungal agent, an antibacterial agent, an antialgal agent, a wetting agent, an antifoaming agent, a leveling agent, a lubricant, a dehydrating agent, an ultraviolet absorber, an antioxidant, a light stabilizer, a fiber, a perfume, a chemical substance adsorbent, a photocatalyst, a hygroscopic and dehydrating powder, and the like.

[0147] (Heat storage molded body)

[0148] The present application relates to a heat storage molded body characterized by being formed from the heat storage material composition. The heat storage molded body can be obtained by curing the heat storage material composition, and can be used by being layered with various substrates, and can be used as a heat storage member by being impregnated or contained in a porous substrate and being cured, and can be used by being layered with various substrates.

[0149] From the viewpoint of heat storage, the lower limit value of the latent heat amount of the heat storage molded body is preferably 70 J / g or more, more preferably 100 J / g or more, and the upper limit value is preferably 220 J / g or less, more preferably 200 J / g or less.

[0150] As the phase transition temperature (melting point or freezing point) of the heat storage molded body, for example, in the case of use in the interior or exterior material of a building or the like, it is preferably around 10 to 60°C, more preferably around 15 to 50°C.

[0151] As the porous base material, for example, woven fabrics or nonwoven fabrics of natural fibers such as kapok, hemp, wool, silk, etc., organic fibers such as nylon, Tetoron, acrylic, polyester, polyurethane, vinylon, rayon, aramid, azole, etc., inorganic fibers such as glass, etc., paper base materials such as paper, corrugated paper, etc., fibrous base materials such as MDF, insulation fiberboard, shaving board, etc., porous base materials such as stone plate, plasterboard, ALC board, calcium silicate board, cement wood fiber board, plywood, etc., wooden base materials such as bamboo charcoal, charcoal, etc., foam resin base materials such as polyurethane foam board, styrene foam board, etc., etc. can be exemplified.

[0152] Further, as the various base materials, for example, heat insulating base materials such as polystyrene foam, polyurethane foam, acrylic resin foam, phenol resin foam, polyethylene resin foam, foam rubber, glass wool, rock wool, foam ceramic, etc., resin base materials such as acrylic resin, ethylene resin, etc., glass base materials, metal base materials such as copper, aluminum, iron, brass, zinc, magnesium, nickel, etc., inorganic base materials such as concrete, etc., or the like can be exemplified.

[0153] The heat storage material of the present application, the heat storage material composition containing the same, and the heat storage molded body obtained using the heat storage material composition are mainly suitable as a material for interior or exterior materials of a building such as a house, an interior wall material, an exterior wall material, a ceiling material, a floor material, a bonding material thereof, a partition material, etc. Further, the heat storage material composition of the present application is suitable as a material for an interior material of a room heating system, a room heating and cooling system, a vehicle, etc., an industrial product such as a machine or a machine tool, a thermoelectric conversion system, an insulating material, a protective material or a protective clothing for an extremely cold or fire area, an extremely cold or space, a heat transfer medium, a refrigeration or freezing warehouse for transporting or storing food or a medicine, etc., a vending machine, a bath or a bathroom, a greenhouse, soil, a refrigeration box, an insulating sheet, an anti-condensation sheet, a cooling sheet, an electric product, an OA machine, a plant, a tank, a clothing, a curtain, a carpet, a bedding, a daily necessity, etc.

[0154] The heat storage material of the present application, and the heat storage material composition can be used by various methods, for example, can be enclosed in a box or a bag, etc., or can be contained in a base material, or can be used by a method of encapsulation, or can be immobilized in a binding material, etc., and is useful.

[0155] Example

[0156] The following examples are shown to make the features of the present application more explicit. Further, the present application is not limited by these examples.

[0157] (Synthetic Example 1: Synthesis of saturated fatty acid monoester (A-1) 1)

[0158] Into a four-necked flask of 1 L equipped with a thermometer, a nitrogen inlet tube, a stirrer, a condenser tube, and a water separator tube of 20 mL capacity, 299.1 g of decanoic acid (manufactured by NOF CORPORATION, NAA-102), and 400.9 g of hexadecanol (manufactured by NOF CORPORATION, NAA-44) were charged.

[0159] The reaction water accumulated in the water separator tube was drawn off, and the reaction solution was heated to 240°C. The acid value of the reaction solution was measured every 1 hour, and the reaction was continued until the decrease in the acid value per 1 hour was 0.5 mgKOH / g or less.

[0160] Then, the reaction solution was reduced in pressure to 30 Torr at 220°C, and alcohol and volatile reaction by-products were removed.

[0161] After the reaction solution was cooled to 85°C, 1.5 equivalent parts of the amount of sodium hydroxide calculated from the acid value was diluted with ion exchange water to prepare a 10 mass% aqueous solution, which was added to the reaction solution and stirred for 1 hour. After the stirring was stopped, the solution was left to stand for 30 minutes, and the water layer separated as the lower layer was removed.

[0162] Next, the following operation was repeated 5 times: 20 mass% ion exchange water was added to the reaction solution, which was stirred at 85°C for 10 minutes, left to stand for 15 minutes, and the water layer separated was removed. Then, dehydration was performed by stirring at 100°C for 1 hour at 30 Torr.

[0163] Finally, 2 mass% activated clay was added to the reaction solution, which was stirred at 80°C for 1 hour at 30 Torr, filtered, and the adsorbent was removed. Thus, saturated fatty acid monoester (A-1) 1 was obtained as decyloctadecanoyl ester.

[0164] By appropriately changing the decanoic acid and hexadecanol in Synthesis Example 1 to other compounds shown in Tables 1 and 2, and performing the operation according to Synthesis Example 1, "saturated fatty acid monoester (A-1)", "saturated fatty acid monoester (A-2)", and the like shown in Tables 1 and 2 were synthesized.

[0165] (Acid value and hydroxyl value)

[0166] The acid value (mgKOH / g) and the hydroxyl value (mgKOH / g) of each fatty acid ester shown in Tables 1 and 2 were measured according to JIS K 0070.

[0167] (Melting point and freezing point measurement test)

[0168] Two pieces of a wooden board obtained by immersing 22 g of each fatty acid ester shown in Tables 1 and 2 (at 50°C) in a wooden board (130 mm x 85 mm x 6 mm) were prepared, a thermocouple was sandwiched at the center of the two pieces of the wooden board, and a test body was obtained.

[0169] After the obtained test body was left in a thermostat at 39°C for 6 hours, the temperature change when the test body was moved to a thermostat at 19°C and left for 3 hours, and further left for 3 hours in a thermostat at 39°C was measured using a thermocouple. The measurement results (Example 1 shown below) are shown in Table 1. Figure 1 The melting point (°C) and the freezing point (°C) were measured using the tangent method shown in Table 1. The difference between the melting point and the freezing point (°C) was calculated. The evaluation was performed as described below. The evaluation results are shown in Table 3. The temperature in the thermostat was based on the phase change temperature of the measured fatty acid ester + 10°C and - 10°C. In addition, when the evaluation was 4, 3, or 2, it was determined to be effective. Figure 1

[0170] In addition, test bodies were produced and evaluated in the same manner as in Example 1 for other examples, comparative examples, and reference examples (not shown except for Example 1).

[0171] 4: The difference between the melting point and the freezing point was less than 1°C.

[0172] 3: The difference between the melting point and the freezing point was 1°C or more and less than 2°C.

[0173] 2: The difference between the melting point and the freezing point was 2°C or more and less than 2.5°C.

[0174] 1: The difference between the melting point and the freezing point was 2.5°C or more.

[0175] (Heat storage property test 1)

[0176] Each fatty acid ester shown in Tables 1 and 2 was weighed 50 g on a metal container (160 mm x 109 mm x 27 mm), and the latent heat amount (J / g) was measured using a differential scanning calorimeter (DSC7000X manufactured by Hitachi High-Tech Science Corporation.). Specifically, the temperature was changed from 60°C to -40°C at a temperature increase rate of 10°C / minute and a temperature decrease rate of 10°C / minute, and further from -40°C to 60°C, and the average of the freezing latent heat amount and the melting latent heat amount at that time was taken as the latent heat amount (J / g), and the heat storage property was evaluated. The evaluation was performed as described below. The evaluation results are shown in Table 3 below. In addition, when the evaluation was 3 or 2, it was determined to be effective.

[0177] 3: The latent heat amount was 150 J / g or more.

[0178] 2: The latent heat amount was 120 J / g or more and less than 150 J / g.

[0179] 1: The latent heat amount was less than 120 J / g.

[0180] (Diffusion resistance test 1) ​

[0181] Using each fatty acid ester shown in Table 1 and Table 2, 30 g was weighed on a metal container (160 mm x 109 mm x 27 mm), and the change in mass before and after storage for 30 days was measured at 80°C, and evaluated. The evaluation was performed as described below. The evaluation results are shown in Table 3. In addition, when the evaluation was 4 or 3, it was judged to be effective.

[0182] 4: Change in mass was less than 1%.

[0183] 3: Change in mass was 1% or more and less than 5%.

[0184] 2: Change in mass was 5% or more and less than 10%.

[0185] 1: Change in mass was 10% or more.

[0186] (Hydrolysis resistance test)

[0187] Using each fatty acid ester shown in Table 1 and Table 2, a hydrolysis resistance test according to ASTM-D261 (94°C x 2 days) was performed, the change in acid value before and after the test was measured, and evaluated. The evaluation was performed as described below. The evaluation results are shown in Table 3. In addition, when the evaluation was 3 or 2, it was judged to be effective.

[0188] 3: Change in acid value was less than 0.20.

[0189] 2: Change in acid value was 0.20 or more and less than 0.50.

[0190] 1: Change in acid value was 0.50 or more.

[0191] (Curing test)

[0192] Using the raw materials (composition) shown in Table 4, the raw materials were mixed at a temperature of 50°C at the blending amounts shown in Table 5 and Table 6, 50 g was weighed on a metal container (160 mm x 109 mm x 27 mm), and cured at 80°C for 5 hours to obtain a test body. The state of the obtained test body was observed and evaluated. The evaluation was performed as described below. The evaluation results are shown in Table 5 and Table 6. In addition, when the evaluation was 4 or 3, it was judged to be effective.

[0193] 4: Uniformly cured

[0194] 3: Almost uniformly cured

[0195] 2: Not uniformly cured, and layer separation was observed.

[0196] 1: Not cured, and was always liquid.

[0197] (Leakage resistance test)

[0198] After the test body obtained in the above curing test was allowed to stand for 12 hours in an atmosphere of 15°C and then for 5 hours in an atmosphere of 50°C, a test body was obtained. The amount of the heat storage material leaked (dropped) from the surface of the test body was measured with the test body inclined at 45°, and evaluated. The evaluation was performed as described below. The evaluation results are shown in Tables 5 and 6. In addition, when the evaluation was 5, 4, or 3, it was determined to be effective.

[0199] 5: No leakage of the heat storage material was observed.

[0200] 4: The amount of the heat storage material leaked was less than 1%.

[0201] 3: The amount of the heat storage material leaked was 1% or more but less than 2%.

[0202] 2: The amount of the heat storage material leaked was 2% or more but less than 3%.

[0203] 1: The amount of the heat storage material leaked was 3% or more.

[0204] (Diffusion resistance test 2)

[0205] The change in the mass of the test body obtained in the above curing test before and after storage at 80°C for 30 days was measured, and evaluated. The evaluation was performed as described below. The evaluation results are shown in Tables 5 and 6. In addition, when the evaluation was 4 or 3, it was determined to be effective.

[0206] 4: The change in the mass was less than 1%.

[0207] 3: The change in the mass was 1% or more but less than 5%.

[0208] 2: The change in the mass was 5% or more but less than 10%.

[0209] 1: The change in the mass was 10% or more.

[0210] (Heat storage test 2)

[0211] The latent heat amount (J / g) of the test body obtained in the above curing test was measured using a differential scanning calorimeter (DSC7000X manufactured by Hitachi High-Tech Science Corporation.) to evaluate the heat storage property. Specifically, the average of the solidification latent heat amount and the melting latent heat amount measured at a temperature increase rate of 10°C / minute and a temperature decrease rate of 10°C / minute was used as the latent heat amount (J / g), and the heat storage property was evaluated. The evaluation was performed as described below. The evaluation results are shown in Tables 5 and 6. In addition, when the evaluation was 3 or 2, it was determined to be effective.

[0212] 3: The latent heat amount was 100 J / g or more.

[0213] 2: The latent heat amount was 70 J / g or more but less than 100 J / g.

[0214] 1: latent heat is less than 70 J / g.

[0215] [Table 1]

[0216]

[0217] [Table 2]

[0218]

[0219] [Table 3]

[0220]

[0221] [Table 4]

[0222]

[0223] [Table 5]

[0224]

[0225] [Table 6]

[0226]

[0227] In addition, "-" in Table 6 above indicates that the test was not performed because the test body was not cured in the leakage resistance test, and indicates that the test was not properly performed because the test body was not cured or leaked a large amount in the leakage resistance test in the diffusion resistance test and the heat storage test.

[0228] From the evaluation results of Table 3 above, it can be confirmed that in all of the examples, by using the component (A-1) as the heat storage material, all of the characteristics can be satisfied.

[0229] On the other hand, in Reference Example 1, Comparative Example 1, and Comparative Example 2, the difference between the melting point and the freezing point is larger than in the examples, and in particular, in Comparative Example 1 and Comparative Example 2, since the desired component (A) is not used, the difference between the melting point and the freezing point is particularly large, and the diffusion resistance or the hydrolysis resistance also shows a result that is worse than the examples.

[0230] In addition, from the evaluation results of Tables 5 and 6 above, it can be confirmed that in all of the examples, the heat storage molded body obtained by using the heat storage material composition using the desired components (A) to (C) contributes to the curing property, the heat storage property, the diffusion resistance, and the leakage resistance.

[0231] On the other hand, in the comparative examples and the reference example, a heat storage molded body that satisfies all of the curing property, the heat storage property, the diffusion resistance, and the leakage resistance at the same time cannot be obtained. BRIEF DESCRIPTION OF DRAWINGS

[0232] Figure 1 The test results for the melting point and the freezing point of the saturated fatty acid monoester used in Example 1 were determined.

Claims

1. A heat accumulating material composition, characterized by comprising: a heat-accumulating material, a polyol (B), and an isocyanate (C), the heat-accumulating material contains a saturated fatty acid monoester (A) obtained by reacting a saturated aliphatic monocarboxylic acid having a linear alkyl group with a carbon number of 8 or more and 20 or less and a saturated aliphatic monohydric alcohol having a linear alkyl group with a carbon number of 8 or more and 20 or less, the saturated fatty acid monoester (A) contains a saturated fatty acid monoester (A-1) obtained by reacting a saturated aliphatic monocarboxylic acid (a-c) having a linear alkyl group with a carbon number (Nc) of 8 or more and 20 or less and a saturated aliphatic monohydric alcohol (a-a) having a linear alkyl group with a carbon number (Na) of 8 or more and 20 or less and satisfying the following formulae (1) to (3), (1) (Nc) < (Na) (2) 22 ≤ (Nc + Na) ≤ 28 (3) 4 ≤ (Na - Nc) ≤ 8, the polyol (B) contains a polyester polyol (B-1) and a polyether polyol (B-2), the containing ratio of the (B-1) component to the (B-2) component is (B-1) component : (B-2) component = 50 : 50 to 99 : 1 in terms of mass ratio.

2. The heat accumulating material composition according to claim 1, characterized by the containing ratio of the heat-accumulating material in the total amount of the heat-accumulating material composition is 50 mass% or more and 95 mass% or less.

3. The heat accumulating material composition according to claim 1, characterized by the (B-1) component contains a polyester polyol having a number average molecular weight of 1000 or more and 4000 or less and a functional group number of 2 or more and less than 3.

4. The heat accumulating material composition according to claim 1, characterized by the (B-2) component contains a polyether polyol having a number average molecular weight of 1000 or more and 12000 or less and a functional group number of 2 or more and 3 or less.

5. The heat accumulating material composition according to claim 1, characterized by the (C) component contains a trimer of isocyanate.

6. The heat accumulating material composition according to any one of claims 1 to 5, characterized by the mixing ratio of the total amount of the (B-1) component and the (B-2) component to the (C) component is 0.75 or more and 2.2 or less in terms of NCO / OH ratio.

7. A heat accumulating molded body, characterized by, formed from the heat-accumulating material composition according to any one of claims 1 to 6.

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