Article having heat storage performance

Abstract

An article having heat storage performance according to the present invention comprises: a packaging container; and a granular material that is filled at a basis weight of at least 0.1 g / cm2 in the packaging container, wherein the granular material contains a polymer having a melting enthalpy of at least 30 J / g, as observed in the temperature range of 10-60ºC by differential scanning calorimetry.

Description

Items with heat storage properties

[0001] The present invention relates to an article having heat storage properties.

[0002] Many conventional thermal insulation materials are made of polystyrene foam or polyurethane foam. Patent Document 1 describes an expanded polystyrene thermal insulation material that can be easily fitted into joists, partition walls, etc., and a method for manufacturing the same. Thermal insulation materials used in building materials such as walls, floors, and ceilings, as well as insulated containers, are required to have high thermal insulation performance. Patent Document 2 considers using a laminate having an insulating layer made of polystyrene foam and a heat storage layer containing a polymer with a specific structure as a thermal insulation material in order to improve the thermal insulation performance of the thermal insulation material.

[0003] JP 59-11227 A International Publication No. 2017 / 217417

[0004] In the case of a laminate having a heat insulating layer and a heat storage layer, the process for producing the heat insulating material requires multiple steps, and the shape of the heat insulating material is limited. Therefore, one aspect of the present invention aims to provide an article that can more easily exhibit heat storage performance.

[0005] In some aspects of the present invention, the following [1] to [7] are provided: [1] a packaging container, and a coating material containing 0.1 g / cm ２ and a granular material filled at a basis weight of 1000 or more, wherein the granular material contains a polymer having a melting enthalpy of 30 J / g or more as observed by differential scanning calorimetry in a temperature range of 10°C to 60°C. [2] The article according to the above item [1], wherein the polymer is a polymer having a constitutional unit represented by the following formula (1): [(In formula (1), R １ represents a hydrogen atom or a methyl group, L １１ represents a single bond, —CO—O—, —O—CO—, or —O—; L １２ is a single bond, -CH ２ -, -CH ２ -CH ２ -, -CH ２ -CH ２ -CH ２ -, -CH ２ -CH(OH)-CH２ - or -CH ２ -CH(CH ２ OH)—, L １３ is a single bond, -CO-O-, -O-CO-, -O-, -CO-NH-, -NH-CO-, -CO-NH-CO-, -NH-CO-NH-, -NH-, or -N(CH ３ )-, L １６ represents an alkyl group having 14 to 30 carbon atoms.] [3] The article according to [2] above, wherein the polymer has a structural unit derived from ethylene. [4] The article according to any one of [1] to [3] above, wherein the long side of the granules is 0.1 mm to 50 mm. [5] The article according to any one of [1] to [4] above, wherein the filling amount of the granules is less than 20 kg. [6] The article according to any one of [1] to [5] above, wherein the packaging container is gas permeable. [7] The article according to any one of [1] to [6] above, wherein the granules further contain a low molecular weight compound having a molecular weight of 2000 or less, and the content of the low molecular weight compound is 3 parts by mass to 1000 parts by mass per 100 parts by mass of the polymer.

[0006] According to the present invention, it is possible to provide an article that can more easily exhibit heat storage performance.

[0007] FIG. 1 is a schematic diagram of the inside of a box model for measuring thermal properties.

[0008] Hereinafter, embodiments of the present invention will be described in detail, but the present invention is not limited to the following embodiments.

[0009] In this specification, the term "step" refers not only to an independent step, but also to a step that is not clearly distinguishable from other steps, as long as the intended effect of the step is achieved. In this specification, a numerical range indicated using "to" indicates a range that includes the numerical values ​​before and after "to" as the minimum and maximum values, respectively. In the numerical ranges described in stages in this specification, the upper or lower limit of a numerical range of a certain step may be replaced with the upper or lower limit of a numerical range of another step. Furthermore, in the numerical ranges described in this specification, the upper or lower limit of the numerical range may be replaced with a value shown in the examples.

[0010] [Article with Heat Storage Capacity] The article with heat storage capacity according to this embodiment is a packaging container and a packaging container containing 0.1 g / cm ２ and granular materials filled at a basis weight of 30 J / g or more, wherein the granular materials contain a polymer having a melting enthalpy of 30 J / g or more as observed by differential scanning calorimetry in a temperature range of 10°C or more and 60°C or less.

[0011] (Packaging Container) The packaging container is not particularly limited as long as it can be filled with granular material. Examples of packaging containers include bags, woven bags, nonwoven fabrics, pouches, nets, foams, bottles, boxes, and baskets.

[0012] The material of the packaging container is not particularly limited. Examples of the material of the packaging container include resin materials such as polyolefins (polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-α-olefin copolymer, ethylene-methyl acrylate, ethylene-methyl methacrylate copolymer, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, etc.), polystyrene, polyacrylonitrile, polymethyl methacrylate, polyvinyl chloride, polyesters (polyethylene terephthalate, polybutylene terephthalate, polycarbonate, etc.), polyamides (nylon-6, nylon-6,6, etc.), and polyurethane, metal materials such as aluminum, ceramics, silicone rubber, paper, cotton, hemp, wood, and bamboo.

[0013] The packaging container may be air permeable from the viewpoint of preventing condensation and ease of application. Examples of air permeable packaging containers include containers made of highly air permeable resin or paper, containers made of nonwoven fabric, and containers with holes.

[0014] (Granular body) The granular body according to this embodiment contains a polymer (hereinafter sometimes referred to as "polymer 1") having a melting enthalpy of 30 J / g or more as observed by differential scanning calorimetry within a temperature range of 10°C or more and 60°C or less.

[0015] In this specification, the enthalpy of fusion is the heat of fusion obtained by analyzing the portion of the melting curve measured by differential scanning calorimetry below, within the temperature range of 10°C to 60°C, in accordance with a method in accordance with JIS K7122-1987. Hereinafter, the enthalpy of fusion may be referred to as ΔHm.

[0016] The amount of granular material filled in the packaging container is not particularly limited and can be set depending on the material and capacity of the packaging container. The amount of granular material filled may be less than 20 kg, or may be 0.05 to 18 kg, 0.1 to 15 kg, or 0.2 to 10 kg.

[0017] The weight per unit area of ​​the granular material filled in the packaging container is 0.1 g / cm ２ or more, and 0.1 to 20 g / cm ２ ,0.1~10g / cm ２ , or 0.1 to 5 g / cm ２ The lower limit of the basis weight of the granular material may be 0.10 g / cm ２ Above, 0.12g / cm ２ or more, or 0.14 g / cm ２ It may be more than that.

[0018] The shape of the granules may be spherical, angular (cubic), bead-like, or cylindrical (pellet-like). The granules may have a long side of 0.1 mm or more and 50 mm or less, preferably 1.0 mm or more and 50 mm or less, more preferably 1.0 mm or more and 30 mm or less, and even more preferably 4.0 mm or more and 8.0 mm or less.

[0019] The granules according to this embodiment can be produced using a thermal storage composition containing polymer 1. The granules may be produced, for example, by cutting a molded body of the thermal storage composition described below to a predetermined size. Components that may be contained in the granules and the thermal storage composition will be described in detail below.

[0020] <Polymer 1> The ΔHm of polymer 1 observed within a temperature range of 10°C or higher and 60°C or lower is preferably 50 J / g or higher, more preferably 60 J / g or higher, and even more preferably 70 J / g or higher. The upper limit of the ΔHm is usually 200 J / g or lower, and may be 180 J / g or lower and 150 J / g or lower, or 100 J / g or lower. ΔHm is measured according to the method described in the examples.

[0021] For example, the number of structural units B described later in polymer 1 and the L １６ By adjusting the number of carbon atoms in the compound, ΔHm can be adjusted to the above range, and as a result, the heat storage performance of the heat storage composition can be adjusted.

[0022] Preferably, polymer 1 (one type of polymer 1 or a mixture of multiple polymers 1) has a melting peak temperature Tm in the range of 10 to 60°C, more preferably 10 to 50°C, even more preferably 10 to 40°C, and even more preferably 20 to 40°C.

[0023] The melting peak temperature is the temperature at the apex of the melting peak obtained by analyzing the melting curve, and can be obtained by the procedure described in the Examples. When there are multiple melting peaks, the temperature at the apex of the melting peak with the largest amount of melting endotherm is taken as the melting peak temperature.

[0024] For example, the number of structural units B described later in polymer 1 and the L １６ By adjusting the number of carbon atoms, it is possible to adjust the melting peak temperature of Polymer 1. As a result, it is possible to adjust the heat storage performance of the heat storage composition containing Polymer 1.

[0025] The granules to be filled in the packaging container may be a mixture of granules of polymer 1 having different melting peak temperatures.

[0026] Polymer 1 has a molecular weight of more than 2000. The weight-average molecular weight of Polymer 1 measured by gel permeation chromatography (GPC) using an apparatus equipped with a light scattering detector is preferably 10,000 to 1,000,000, more preferably 50,000 to 750,000, and even more preferably 100,000 to 500,000. In measuring the weight-average molecular weight of Polymer 1 by gel permeation chromatography, the mobile phase is orthodichlorobenzene and the measurement temperature is 155°C.

[0027] Examples of polymer 1 include polymers having a long-chain alkyl group or a long-chain ether group on the side chain, which may be branched and optionally substituted with a functional group. The polymer is not particularly limited, but examples include polymers whose main component is a (meth)acrylate having a long-chain alkyl group or a long-chain ether group on the side chain, which may be branched and optionally substituted with a functional group; polymers whose main component is a vinyl ester main chain having a long-chain alkyl group or a long-chain ether group on the side chain, which may be branched and optionally substituted with a functional group; polymers whose main component is a vinyl ether main chain having a long-chain alkyl group or a long-chain ether group on the side chain, which may be branched and optionally substituted with a functional group; and polymers whose main component is a polyolefin main chain having a long-chain alkyl group or a long-chain ether group on the side chain, which may be branched and optionally substituted with a functional group. The side chain is preferably a long-chain alkyl group which may be branched and optionally substituted with a functional group, and polymers whose main component is a (meth)acrylate or polyolefin main chain are preferred. Examples of polymer 1 include polymers described in JP 2015-091903 A, WO 2016 / 098674, WO 2017 / 217419, WO 2022 / 244848, and the like.

[0028] In one embodiment of the polymer 1, the carbon number is 14 or more and 30 or less (C １４～３０ Polymer 1 preferably has a structural unit represented by the following formula (1) (sometimes referred to as structural unit B):

[0029] In formula (1), R １ represents a hydrogen atom or a methyl group, L １１ represents a single bond, —CO—O—, —O—CO—, or —O—; L １２ is a single bond, -CH ２ -, -CH ２ -CH ２ -, -CH ２ -CH ２ -CH ２ -, -CH ２ -CH(OH)-CH ２ - or -CH ２ -CH(CH ２ OH)—, L １３ is a single bond, -CO-O-, -O-CO-, -O-, -CO-NH-, -NH-CO-, -CO-NH-CO-, -NH-CO-NH-, -NH-, or -N(CH ３ )-, L １６ is C １４～３０ It should be noted that L １１ , L １２ , and L １３ In each of the horizontally written chemical formulas, the left side corresponds to the upper side of formula (1) (the main chain side of the polymer), and the right side corresponds to the lower side of formula (1) (the terminal side of the side chain of the polymer).

[0030] R １ is preferably a hydrogen atom. １１ is preferably —CO—O—, —O—CO—, or —O—, more preferably —CO—O— or —O—CO—, and even more preferably —CO—O—. １２ is preferably a single bond, —CH ２ -, -CH ２ -CH ２ - or -CH ２ -CH ２ -CH ２ -, and more preferably a single bond. １３ is preferably a single bond, —O—CO—, —O—, —NH—, or —N(CH ３ )-, more preferably a single bond.

[0031] L in formula (1) １６ is C so that the composition containing polymer 1 has good moldability.１４～３０ is an alkyl group of the formula: １４～３０ The alkyl group of １４～３０ and C １４～３０ Examples of branched alkyl groups include: １６ is preferably C １４～３０ and more preferably a straight chain alkyl group of C １４～２４ and more preferably C １６～２２ is a straight chain alkyl group.

[0032] C １４～３０ Examples of the straight-chain alkyl group include an n-tetradecyl group, an n-pentadecyl group, an n-hexadecyl group, an n-heptadecyl group, an n-octadecyl group, an n-nonadecyl group, an n-eicosyl group, an n-heneicosyl group, an n-docosyl group, an n-tricosyl group, an n-tetracosyl group, an n-pentacosyl group, an n-hexacosyl group, an n-heptacosyl group, an n-octacosyl group, an n-nonacosyl group, and an n-triacontyl group.

[0033] C １４～３０ Examples of the branched alkyl group include an isotetradecyl group, an isopentadecyl group, an isohexadecyl group, an isoheptadecyl group, an isooctadecyl group, an isononadecyl group, an isoeicosyl group, an isoheneicosyl group, an isodocosyl group, an isotricosyl group, an isotetracosyl group, an isopentacosyl group, an isohexacosyl group, an isoheptacosyl group, an isooctacosyl group, an isononacosyl group, and an isotriacontyl group.

[0034] R in formula (1) １ , L １１ , L １２ , L １３ The combination is preferably:

[0035] R in formula (1) １ , L １１ , L １２ , L １３ As a combination of １ is a hydrogen atom, and L １１ , L １２ , and L１３ is a single bond, and L １６ is C １４～３０ and R １ is a hydrogen atom or a methyl group, and L １１ is —CO—O—, and L ２ and L ３ is a single bond, and L １６ is C １４～３０ A combination of the alkyl groups of the formula (I) is also preferred.

[0036] R in formula (1) １ , L １１ , L １２ , and L １３ The combination is more preferably:

[0037] R in formula (1) １ , L １１ , L １２ , and L １３ The combinations are more preferably as follows:

[0038] The structural unit B is preferably n-hexadecene, n-octadecene, n-eicosene, n-docosene, n-tetracosene, n-hexacosene, n-octacosene, n-triacontene, n-dotriacontene, n-tetradecyl acrylate, n-pentadecyl acrylate, n-hexadecyl acrylate, n-heptadecyl acrylate, n-octadecyl acrylate, n-nonadecyl acrylate, or n-eicosyl acrylate. Acrylate, n-heneicosyl acrylate, n-docosyl acrylate, n-tricosyl acrylate, n-tetracosyl acrylate, n-pentacosyl acrylate, n-hexacosyl acrylate, n-heptacosyl acrylate, n-octacosyl acrylate, n-nonacosyl acrylate, n-triacontyl acrylate, n-tetradecyl methacrylate, n-pentadecyl methacrylate, n-hexa decyl methacrylate, n-heptadecyl methacrylate, n-octadecyl methacrylate, n-nonadecyl methacrylate, n-eicosyl methacrylate, n-heneicosyl methacrylate, n-docosyl methacrylate, n-tricosyl methacrylate, n-tetracosyl methacrylate, n-pentacosyl methacrylate, n-hexacosyl methacrylate, n-heptacosyl methacrylate, n-octacosyl methacrylate, n-nonacosyl methacrylate, n-triacontyl methacrylate, n-vinyltetradecylate, n-vinylhexadecylate, n-vinyloctadecylate, n-vinyleicosylate, n-vinyldocosylate, n-tetradecyl vinyl ether, n-hexadecyl vinyl ether, n-octadecyl vinyl ether, n-eicosyl vinyl ether, or n-docosyl vinyl ether.

[0039] Polymer 1 may have two or more types of structural units B, and may be, for example, a polymer having a structural unit derived from n-hexadecyl acrylate and a structural unit derived from n-octadecyl acrylate.

[0040] Polymer 1 is preferably a polymer having a structural unit derived from ethylene (sometimes referred to as structural unit A) so that the heat storage composition has good moldability and good shape retention in the granular body at temperatures equal to or higher than the peak melting temperature of polymer 1. Structural unit A is a structural unit obtained by polymerizing ethylene, and structural unit A may form a branched structure in the polymer.

[0041] The polymer 1 is preferably a polymer having a structural unit B represented by formula (1) and a structural unit A derived from ethylene.

[0042] Polymer 1 may have at least one structural unit (sometimes referred to as structural unit C) selected from the group consisting of structural units represented by the following formula (2) and structural units represented by the following formula (3):

[0043] In formula (2), R ２ represents a hydrogen atom or a methyl group, L ２１ represents a single bond, —CO—O—, —O—CO—, or —O—; L ２４ is a single bond or C １～８ represents an alkylene group represented by the formula: ２５ represents a hydrogen atom, an epoxy group, -CH(OH)-CH ２ OH, a carboxy group, a hydroxy group, an amino group, or C １～４ It is to be noted that L represents an alkylamino group represented by the formula: ２１ In each of the horizontally written chemical formulas in the explanation of the chemical structure, the left side corresponds to the upper side of formula (2) (the main chain side of the polymer), and the right side corresponds to the lower side of formula (2) (the terminal side of the side chain of the polymer).

[0044] In formula (2), R ２ is preferably a hydrogen atom. ２１ is preferably —CO—O—, —O—CO—, or —O—, more preferably —CO—O— or —O—CO—, and even more preferably —CO—O—.

[0045] In formula (2), L ２４ C as １～８Examples of the alkylene group in formula (2) include a methylene group, an ethylene group, an n-propylene group, a 1-methylethylene group, an n-butylene group, a 1,2-dimethylethylene group, a 1,1-dimethylethylene group, a 2,2-dimethylethylene group, an n-pentylene group, an n-hexylene group, an n-heptalene group, an n-octylene group, and a 2-ethyl-n-hexylene group. ２４ is preferably a methylene group, an ethylene group, or an n-propylene group, more preferably a methylene group.

[0046] In formula (2), L ２５ C as １～４ Examples of the alkylamino group include a methylamino group, an ethylamino group, a propylamino group, a butylamino group, a dimethylamino group, and a diethylamino group. ２５ is preferably a hydrogen atom, an epoxy group, or CH(OH)—CH ２ It is OH, and more preferably a hydrogen atom.

[0047] R in formula (2) ２ , L ２１ , L ２４ , L ２５ The combination is preferably:

[0048] R in formula (2) ２ , L ２１ , L ２４ , L ２５ The combination is more preferably:

[0049] R in formula (2) ２ , L ２１ , L ２４ , L ２５ The combinations are more preferably as follows:

[0050] Examples of the structural unit represented by formula (2) include propylene, butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, acrylic acid, methacrylic acid, vinyl alcohol, methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, sec-butyl acrylate, tert-butyl acrylate, methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, sec-butyl methacrylate, and tert-butyl methacrylate. Examples of the alkyl esters derived from vinyl ethers include vinyl formate, vinyl acetate, vinyl propionate, vinyl(n-butyrate), vinyl(isobutyrate), methyl vinyl ether, ethyl vinyl ether, n-propyl vinyl ether, isopropyl vinyl ether, n-butyl vinyl ether, isobutyl vinyl ether, sec-butyl vinyl ether, tert-butyl vinyl ether, glycidyl acrylate, glycidyl methacrylate, 2,3-dihydroxypropyl acrylate, 2,3-dihydroxypropyl methacrylate, 3-(dimethylamino)propyl acrylate, and 3-(dimethylamino)propyl methacrylate.

[0051] When polymer 1 contains structural unit C, and structural unit C is represented by formula (3), the structural unit may be derived from maleic anhydride. Furthermore, structural unit C may be formed by a condensation reaction of two structural units that may be selected in combination from structural unit B and structural unit C represented by formula (2).

[0052] Polymer 1 may have two or more types of structural units C, and may be, for example, a polymer having a structural unit derived from methyl acrylate, a structural unit derived from ethyl acrylate, and a structural unit derived from glycidyl methacrylate.

[0053] Polymer 1 is preferably a polymer having a structural unit B represented by formula (1). Examples of polymers having a structural unit B represented by formula (1) include polymers consisting of structural unit B, polymers having structural unit B and structural unit A, polymer 1 having structural unit B and structural unit C, and polymers having structural unit B, structural unit A, and structural unit C.

[0054] Examples of the "polymer consisting of structural unit B" include R １ is a hydrogen atom or a methyl group, and L １１ , L １２ , and L １３ is a single bond, and L １６ is C １４～３０ a polymer comprising a structural unit B represented by formula (1), which is an alkyl group represented by R １ is a hydrogen atom or a methyl group, and L １１ -CO-O-, L １２ and L １３ is a single bond, L １６ is C １４～３０ Examples of suitable polymers include polymers comprising a structural unit B represented by formula (1), which is an alkyl group represented by the following formula:

[0055] Examples of the "polymer having the structural unit B and the structural unit A" include R １ is a hydrogen atom or a methyl group, and L １１ , L １２ , and L １３ is a single bond, and L １６ is C １４～３０ Examples of suitable polymers include a polymer having a structural unit B represented by formula (1), which is an alkyl group represented by the formula (1), and a structural unit A. In this case, it is preferable that the total number of structural units A and B is 90% or more, relative to 100% of the total number of all structural units contained in the polymer.

[0056] Examples of "polymers having structural units B, A, and C" include R １ is a hydrogen atom or a methyl group, and L １１ is —CO—O—, and L １２ and L １３ is a single bond, and L １６ is C １４～３０ A structural unit B represented by formula (1) which is an alkyl group represented by formula (1), a structural unit A, and R２ is a hydrogen atom or a methyl group, and L ２１ is —CO—O—, and L ２４ is a methylene group, and L ２５ and a structural unit C represented by formula (2) in which R is a hydrogen atom. In this case, the total number of structural units A, B, and C is 90% or more relative to 100% of the total number of all structural units contained in the polymer.

[0057] From the viewpoint of increasing ΔHm, polymer 1 is preferably a polymer in which the number of structural units B is 50 to 80% relative to 100% of the total number of structural units B and A contained in the polymer. From the viewpoint of moldability, polymer 1 is preferably a polymer in which the number of structural units B is 10 to 50% relative to 100% of the total number of structural units B and A contained in the polymer.

[0058] Examples of the "polymer 1 having structural units B and C" include R １ is a hydrogen atom or a methyl group, and L １１ is —CO—O—, and L １２ and L １３ is a single bond, and L １６ is C １４～３０ A structural unit B represented by formula (1) which is an alkyl group, and R ２ is a hydrogen atom or a methyl group, and L ２１ is —CO—O—, and L ２４ is a methylene group, and L ２５ and a structural unit C represented by formula (2) in which R is a hydrogen atom. In this case, it is preferable that the number of structural units B is 80% or more relative to 100% in total of the structural units B and C contained in the polymer.

[0059] In one embodiment of polymer 1, relative to 100% of the total number of structural units A, B, and C, the number of structural units A is typically 0 to 99%, and the total number of structural units B and C is typically 1 to 100%. Relative to 100% of the total number of structural units B and C, the number of structural units B is typically 1 to 100%, and the number of structural units C is typically 0 to 99%.

[0060] In one embodiment, the number of structural units A in polymer 1 is 1 to 99% relative to the total number of structural units A, B, and C (100%), and is preferably 70 to 99%, more preferably 80 to 97.5%, and even more preferably 85 to 92.5%, so that the shape retention of a molded article containing the heat storage composition of the present invention is good. The total number of structural units B and C in polymer 1 is preferably 1 to 30%, more preferably 2.5 to 20%, and even more preferably 7.5 to 15%, relative to the total number of structural units A, B, and C (100%), so that the shape retention of a molded article containing the heat storage composition of the present invention is good.

[0061] In one embodiment, the number of structural units B in polymer 1 is typically 1 to 100%, relative to 100% (the total number of structural units B and C). In order to ensure that a composition containing polymer 1 has good heat storage performance, the number is preferably 60 to 100%, and more preferably 80 to 100%.

[0062] In one embodiment, the number of structural units C in polymer 1 is typically 0 to 99%, relative to 100% (the total number of structural units B and C). In order to ensure that a composition containing polymer 1 has good heat storage performance, the number is preferably 0 to 40%, and more preferably 0 to 20%.

[0063] The number of structural units A, the number of structural units B, and the number of structural units C were measured by a known method. １３ C nuclear magnetic resonance spectrum ( １３ C-NMR spectrum) or １ H nuclear magnetic resonance spectrum ( １ It is determined from the integral value of the signals assigned to each structural unit (H-NMR spectrum).

[0064] When polymer 1 is produced by a method of reacting a precursor polymer P described below with a compound α described below, the number of structural units A, the number of structural units B, and the number of structural units C can be determined, for example, by the following method.

[0065] <Constituent unit A derived from ethylene when precursor polymer P is ethylene-methyl acrylate copolymer> １and structural unit C derived from methyl acrylate １ When the precursor polymer P contains a structural unit A derived from ethylene, first, the number of structural units A contained in the precursor polymer P is １ and structural unit C １ Find the number of. １３ When determining from a C-NMR spectrum, for example, １ , b １ , c １ , d １ , and e １ The integral value in the range is calculated, and the number of dyads (AA, AC, CC) of structural unit A and structural unit C is calculated from the following formula, and the number of structural units A and C is calculated by substituting the result into the following formula. Here, AA is a structural unit A-structural unit A dyad, AC is a structural unit A-structural unit C dyad, and CC is a structural unit C-structural unit C dyad. １ :29.0-31.0ppmb １ :32.5-33.2ppmc １ :42.0-42.3ppmd １ :43.5-44.5ppm e １ :45.5-46.5ppm AA=a １ / 4+b １ / 2 AC = e １ CC = c １ +d １

[0066] <Structural Unit C Derived from Methyl Acrylate １ The conversion rate X of the structural unit B represented by formula (1) Ｂ > (unit: %) The structural unit C contained in the precursor polymer P reacts with the compound α described below to form the structural unit B in the polymer 1. １ The conversion rate X of the structural unit B Ｂ is calculated by the following method.

[0067] Signals (within the range f １ ) and the signal (range g １) into the formula below to calculate the conversion rate. １ :50.5-51.2ppm g １ : 63.9-64.8 ppm Conversion rate (X Ｂ )=100×g1 / (f1+g1)

[0068] <Number of Structural Units A Derived from Ethylene, Structural Units B Represented by Formula (1), and Structural Units C Derived from Methyl Acrylate Contained in Polymer 1> (unit: %) In the reaction between Precursor Polymer P and Compound α described below, the structural units A contained in Precursor Polymer P do not change. Therefore, the number of structural units A contained in Polymer 1 and the number of structural units A contained in Precursor Polymer P are １ The number of structural units A is the same (number of structural units A = number of structural units A １ The number of structural units B contained in polymer 1 is the number of structural units C contained in precursor polymer P. １ Number and conversion rate X Ｂ (Number of structural units B = Number of structural units C １ Number of × Conversion Rate X Ｂ The number of structural units C contained in polymer 1 is the same as that of structural units C contained in precursor polymer P. １ and the number of structural units B contained in polymer 1 (the number of structural units C = the number of structural units C １ (number of units - number of structural units B).

[0069] The contents (% by mass) of the structural unit A, structural unit B, and structural unit C contained in polymer 1 can each be calculated using the following formulas: Mass % of structural unit A = (number of structural units A x molecular weight of structural unit A) / (number of structural units A x molecular weight of structural unit A + number of structural units B x molecular weight of structural unit B + number of structural units C x molecular weight of structural unit C) Mass % of structural unit B = (number of structural units B x molecular weight of structural unit B) / (number of structural units A x molecular weight of structural unit A + number of structural units B x molecular weight of structural unit B + number of structural units C x molecular weight of structural unit C) Mass % of structural unit C = (number of structural units C x molecular weight of structural unit C) / (number of structural units A x molecular weight of structural unit A + number of structural units B x molecular weight of structural unit B + number of structural units C x molecular weight of structural unit C)

[0070] In one example, the precursor polymer P is a polymer having at least one structural unit C selected from the group consisting of structural units represented by the above formula (2) and structural units represented by the above formula (3) (wherein, in formula (2), L ２１ may be —CO—O—, —O—CO—, or —O—.

[0071] The compound (sometimes referred to as compound α) that reacts with the structural unit C in the precursor polymer P to form the structural unit B is C １４～３０ Alcohols having an alkyl group of C １４～３０ amines having alkyl groups of the formula C １４～３０ alkyl halides having an alkyl group of C １４～３０ carboxylic acids having alkyl groups of the formula C １４～３０ carboxylic acid amides having an alkyl group of C １４～３０ carboxylic acid halides having an alkyl group of C １４～３０ Carbamic acids having alkyl groups of C １４～３０ and alkyl ureas having alkyl groups of C １４～３０ and isocyanates having an alkyl group such as

[0072] Examples of methods for producing polymer 1 include a method of reacting precursor polymer P with compound α and a method of polymerizing each monomer corresponding to a structural unit of polymer 1. The alkyl group of compound α may be, for example, a linear alkyl group or a branched alkyl group, but a linear alkyl group is preferred.

[0073] Precursor polymer P is a raw material for producing polymer 1, and precursor polymer P does not substantially contain structural unit B represented by formula (1). Precursor polymer P may contain a structural unit that does not fall under any of structural unit A, structural unit B, and structural unit C.

[0074] The precursor polymer P is preferably a polymer in which the number of structural units A is 0 to 99% and the total number of structural units C is 1 to 100%, relative to 100% as the total number of structural units A and structural units C; more preferably, it is a polymer in which the number of structural units A is 70 to 99% and the total number of structural units C is 1 to 30%.

[0075] Examples of methods for forming the structural unit B in the polymer 1 include reacting the structural unit C contained in the precursor polymer P with a compound α, polymerizing a monomer that serves as a raw material for the structural unit B, or copolymerizing ethylene with a monomer that serves as a raw material for the structural unit B. The alkyl group of the compound α is preferably a linear alkyl group. A polymerization initiator such as an azo compound may be used in the method of polymerizing the monomer. An example of an azo compound is azobisisobutyronitrile.

[0076] Examples of the precursor polymer P include acrylic acid polymers, methacrylic acid polymers, vinyl alcohol polymers, methyl acrylate polymers, ethyl acrylate polymers, n-propyl acrylate polymers, n-butyl acrylate polymers, methyl methacrylate polymers, ethyl methacrylate polymers, n-propyl methacrylate polymers, n-butyl methacrylate polymers, vinyl formate polymers, vinyl acetate polymers, vinyl propionate polymers, vinyl (n-butylate) polymers, methyl vinyl ether polymers, ethyl vinyl ether polymers, n-propyl vinyl ether polymers, n-butyl vinyl ether polymers, maleic anhydride polymers, glycidyl acrylate polymers, glycidyl methacrylate polymers, 3-(dimethylamino)propyl acrylate polymers, 3-(dimethylamino)propyl methacrylate polymers, ethylene-acrylic acid copolymers, ethylene-methacrylic acid copolymers, ethylene-vinyl alcohol copolymers, ethylene-methyl acrylate copolymers, ethylene Examples of the copolymer include ethylene-ethyl acrylate copolymer, ethylene-n-propyl acrylate copolymer, ethylene-n-butyl acrylate copolymer, ethylene-methyl methacrylate copolymer, ethylene-ethyl methacrylate copolymer, ethylene-n-propyl methacrylate copolymer, ethylene-n-butyl methacrylate copolymer, ethylene-vinyl formate copolymer, ethylene-vinyl acetate copolymer, ethylene-vinyl propionate copolymer, ethylene-vinyl (n-butylate) copolymer, ethylene-methyl vinyl ether copolymer, ethylene-ethyl vinyl ether copolymer, ethylene-n-propyl vinyl ether copolymer, ethylene-n-butyl vinyl ether copolymer, ethylene-maleic anhydride copolymer, ethylene-glycidyl acrylate copolymer, ethylene-glycidyl methacrylate copolymer, ethylene-3-(dimethylamino)propyl acrylate copolymer, and ethylene-3-(dimethylamino)propyl methacrylate copolymer.

[0077] C １４～３０Examples of alcohols having a straight-chain alkyl group include n-tetradecyl alcohol, n-pentadecyl alcohol, n-hexadecyl alcohol, n-heptadecyl alcohol, n-octadecyl alcohol, n-nonadecyl alcohol, n-eicosyl alcohol, n-heneicosyl alcohol, n-docosyl alcohol, n-tricosyl alcohol, n-tetracosyl alcohol, n-pentacosyl alcohol, n-hexacosyl alcohol, n-heptacosyl alcohol, n-octacosyl alcohol, n-nonacosyl alcohol, and n-triacontyl alcohol.

[0078] C １４～３０ Examples of alcohols having a branched alkyl group include isotetradecyl alcohol, isopentadecyl alcohol, isohexadecyl alcohol, isoheptadecyl alcohol, isooctadecyl alcohol, isononadecyl alcohol, isoeicosyl alcohol, isoheneicosyl alcohol, isodocosyl alcohol, isotricosyl alcohol, isotetracosyl alcohol, isopentacosyl alcohol, isohexacosyl alcohol, isoheptacosyl alcohol, isooctacosyl alcohol, isononacosyl alcohol, and isotriacontyl alcohol.

[0079] C １４～３０ Examples of amines having a linear alkyl group include n-tetradecylamine, n-pentadecylamine, n-hexadecylamine, n-heptadecylamine, n-octadecylamine, n-nonadecylamine, n-eicosylamine, n-heneicosylamine, n-docosylamine, n-tricosylamine, n-tetracosylamine, n-pentacosylamine, n-hexacosylamine, n-heptacosylamine, n-octacosylamine, n-nonacosylamine, and n-triacontylamine.

[0080] C １４～３０Examples of amines having a branched alkyl group include isotetradecylamine, isopentadecylamine, isohexadecylamine, isoheptadecylamine, isooctadecylamine, isononadecylamine, isoeicosylamine, isoheneicosylamine, isodocosylamine, isotricosylamine, isotetracosylamine, isopentacosylamine, isohexacosylamine, isoheptacosylamine, isooctacosylamine, isononacosylamine, and isotriacontylamine.

[0081] C １４～３０ Examples of alkyl halides having a straight-chain alkyl group include n-tetradecyl iodide, n-pentadecyl iodide, n-hexadecyl iodide, n-heptadecyl iodide, n-octadecyl iodide, n-nonadecyl iodide, n-eicosyl iodide, n-heneicosyl iodide, n-docosyl iodide, n-tricosyl iodide, n-tetracosyl iodide, n-pentacosyl iodide, n-hexacosyl iodide, n-heptacosyl iodide, n-octacosyl iodide, n-nonacosyl iodide, and n-triacontyl iodide.

[0082] C １４～３０ Examples of alkyl halides having a branched alkyl group include isotetradecyl iodide, isopentadecyl iodide, isohexadecyl iodide, isoheptadecyl iodide, isooctadecyl iodide, isononadecyl iodide, isoeicosyl iodide, isoheneicosyl iodide, isodocosyl iodide, isotricosyl iodide, isotetracosyl iodide, isopentacosyl iodide, isohexacosyl iodide, isoheptacosyl iodide, isooctacosyl iodide, isononacosyl iodide, and isotriacontyl iodide.

[0083] C １４～３０Examples of carboxylic acids having a linear alkyl group include n-tetradecanoic acid, n-pentadecanoic acid, n-hexadecanoic acid, n-heptadecanoic acid, n-octadecanoic acid, n-nonadecanoic acid, n-eicosanoic acid, n-heneicosanoic acid, n-docosanoic acid, n-tricosanoic acid, n-tetracosanoic acid, n-pentacosanoic acid, n-hexacosanoic acid, n-heptacosanoic acid, n-octacosanoic acid, n-nonacosanoic acid, and n-triacontanoic acid.

[0084] C １４～３０ Examples of carboxylic acids having a branched alkyl group include isotetradecanoic acid, isopentadecanoic acid, isohexadecanoic acid, isoheptadecanoic acid, isooctadecanoic acid, isononadecanoic acid, isoeicosanoic acid, isoheneicosanoic acid, isodocosanoic acid, isotricosanoic acid, isotetracosanoic acid, isopentacosanoic acid, isohexacosanoic acid, isoheptacosanoic acid, isooctacosanoic acid, isononacosanoic acid, and isotriacontanoic acid.

[0085] C １４～３０ Examples of carboxylic acid amides having a linear alkyl group include n-tetradecanoic acid amide, n-pentadecanoic acid amide, n-hexadecanoic acid amide, n-heptadecanoic acid amide, n-octadecanoic acid amide, n-nonadecanoic acid amide, n-eicosanoic acid amide, n-heneicosanoic acid amide, n-docosanoic acid amide, n-tricosanoic acid amide, n-tetracosanoic acid amide, n-pentacosanoic acid amide, n-hexacosanoic acid amide, n-heptacosanoic acid amide, n-octacosanoic acid amide, n-nonacosanoic acid amide, and n-triacontanoic acid amide.

[0086] C １４～３０Examples of carboxylic acid amides having a branched alkyl group include isotetradecanoic acid amide, isopentadecanoic acid amide, isohexadecanoic acid amide, isoheptadecanoic acid amide, isooctadecanoic acid amide, isononadecanoic acid amide, isoeicosanoic acid amide, isoheneicosanoic acid amide, isodocosanoic acid amide, isotricosanoic acid amide, isotetracosanoic acid amide, isopentacosanoic acid amide, isohexacosanoic acid amide, isoheptacosanoic acid amide, isooctacosanoic acid amide, isononacosanoic acid amide, and isotriacontanoic acid amide.

[0087] C １４～３０ Examples of carboxylic acid halides having a linear alkyl group include n-tetradecanoic acid chloride, n-pentadecanoic acid chloride, n-hexadecanoic acid chloride, n-heptadecanoic acid chloride, n-octadecanoic acid chloride, n-nonadecanoic acid chloride, n-eicosanoic acid chloride, n-heneicosanoic acid chloride, n-docosanoic acid chloride, n-tricosanoic acid chloride, n-tetracosanoic acid chloride, n-pentacosanoic acid chloride, n-hexacosanoic acid chloride, n-heptacosanoic acid chloride, n-octacosanoic acid chloride, n-nonacosanoic acid chloride, and n-triacontanoic acid chloride.

[0088] C １４～３０ Examples of carboxylic acid halides having a branched alkyl group include isotetradecanoic acid chloride, isopentadecanoic acid chloride, isohexadecanoic acid chloride, isoheptadecanoic acid chloride, isooctadecanoic acid chloride, isononadecanoic acid chloride, isoeicosanoic acid chloride, isoheneicosanoic acid chloride, isodocosanoic acid chloride, isotricosanoic acid chloride, isotetracosanoic acid chloride, isopentacosanoic acid chloride, isohexacosanoic acid chloride, isoheptacosanoic acid chloride, isooctacosanoic acid chloride, isononacosanoic acid chloride, and isotriacontanoic acid chloride.

[0089] C １４～３０Examples of carbamic acids having a straight-chain alkyl group include n-tetradecylcarbamic acid, n-pentadecylcarbamic acid, n-hexadecylcarbamic acid, n-heptadecylcarbamic acid, n-octadecylcarbamic acid, n-nonadecylcarbamic acid, n-eicosylcarbamic acid, n-heneicosylcarbamic acid, n-docosylcarbamic acid, n-tricosylcarbamic acid, n-tetracosylcarbamic acid, n-pentacosylcarbamic acid, n-hexacosylcarbamic acid, n-heptacosylcarbamic acid, n-octacosylcarbamic acid, n-nonacosylcarbamic acid, and n-triacontylcarbamic acid.

[0090] C １４～３０ Examples of carbamic acids having a branched alkyl group include isotetradecylcarbamic acid, isopentadecylcarbamic acid, isohexadecylcarbamic acid, isoheptadecylcarbamic acid, isooctadecylcarbamic acid, isononadecylcarbamic acid, isoeicosylcarbamic acid, isoheneicosylcarbamic acid, isodocosylcarbamic acid, isotricosylcarbamic acid, isotetracosylcarbamic acid, isopentacosylcarbamic acid, isohexacosylcarbamic acid, isoheptacosylcarbamic acid, isooctacosylcarbamic acid, isononacosylcarbamic acid, and isotriacontylcarbamic acid.

[0091] C １４～３０ Examples of alkyl ureas having a straight-chain alkyl group include n-tetradecyl urea, n-pentadecyl urea, n-hexadecyl urea, n-heptadecyl urea, n-octadecyl urea, n-nonadecyl urea, n-eicosyl urea, n-heneicosyl urea, n-docosyl urea, n-tricosyl urea, n-tetracosyl urea, n-pentacosyl urea, n-hexacosyl urea, n-heptacosyl urea, n-octacosyl urea, n-nonacosyl urea, and n-triacontyl urea.

[0092] C １４～３０Examples of alkyl ureas having a branched alkyl group include isotetradecyl urea, isopentadecyl urea, isohexadecyl urea, isoheptadecyl urea, isooctadecyl urea, isononadecyl urea, isoeicosyl urea, isoheneicosyl urea, isodocosyl urea, isotricosyl urea, isotetracosyl urea, isopentacosyl urea, isohexacosyl urea, isoheptacosyl urea, isooctacosyl urea, isononacosyl urea, and isotriacontyl urea.

[0093] C １４～３０ Examples of isocyanates having a linear alkyl group include n-tetradecyl isocyanate, n-pentadecyl isocyanate, n-hexadecyl isocyanate, n-heptadecyl isocyanate, n-octadecyl isocyanate, n-nonadecyl isocyanate, n-eicosyl isocyanate, n-heneicosyl isocyanate, n-docosyl isocyanate, n-tricosyl isocyanate, n-tetracosyl isocyanate, n-pentacosyl isocyanate, n-hexacosyl isocyanate, n-heptacosyl isocyanate, n-octacosyl isocyanate, n-nonacosyl isocyanate, and n-triacontyl isocyanate.

[0094] C １４～３０ Examples of isocyanates having a branched alkyl group include isotetradecyl isocyanate, isopentadecyl isocyanate, isohexadecyl isocyanate, isoheptadecyl isocyanate, isooctadecyl isocyanate, isononadecyl isocyanate, isoeicosyl isocyanate, isoheneicosyl isocyanate, isodocosyl isocyanate, isotricosyl isocyanate, isotetracosyl isocyanate, isopentacosyl isocyanate, isohexacosyl isocyanate, isoheptacosyl isocyanate, isooctacosyl isocyanate, isononacosyl isocyanate, and isotriacontyl isocyanate.

[0095] The melt flow rate (MFR) of the precursor polymer P, measured in accordance with JIS K7210 at a temperature of 190°C and a load of 21 N, is preferably 0.1 to 500 g / 10 min, more preferably 1 to 100 g / 10 min, and even more preferably 5 to 50 g / 10 min.

[0096] Examples of methods for producing the precursor polymer P include coordination polymerization, cationic polymerization, anionic polymerization, and radical polymerization, with radical polymerization being preferred, and radical polymerization under high pressure being more preferred.

[0097] The temperature at which the precursor polymer P and the compound α are reacted is usually 40 to 250°C. This reaction may be carried out in the presence of a solvent. Examples of solvents include hexane, heptane, octane, nonane, decane, toluene, and xylene. If by-products are produced in this reaction, the reaction may be carried out while distilling off the by-products under reduced pressure in order to promote the reaction. Alternatively, the by-products may be azeotroped with the solvent, the vaporized by-products and the solvent may be cooled, the distillate containing the by-products and the solvent may be separated into a by-product layer and a solvent layer, and only the recovered solvent layer may be returned to the reaction system as a reflux liquid.

[0098] The reaction of the precursor polymer P with the compound α may be carried out while melt-kneading the precursor polymer P with the compound α. If by-products are generated when the precursor polymer P and the compound α are reacted while melt-kneading, the reaction may be carried out while distilling off the by-products under reduced pressure in order to promote the reaction. Examples of melt-kneading devices used for melt-kneading include a single-screw extruder, a twin-screw extruder, and a Banbury mixer. The temperature of the melt-kneading device is preferably 100 to 250°C.

[0099] When reacting the precursor polymer P with the compound α, a catalyst may be added to promote the reaction. Examples of the catalyst include alkali metal salts and Group 4 metal complexes. Examples of the alkali metal salts include alkali metal hydroxides such as lithium hydroxide, sodium hydroxide, and potassium hydroxide, and alkali metal alkoxides such as lithium methoxide and sodium methoxide. Examples of the Group 4 metal complexes include tetra(isopropyl) orthotitanate, tetra(n-butyl) orthotitanate, and tetraoctadecyl orthotitanate. The amount of catalyst added is preferably 0.01 to 50 parts by mass, and more preferably 0.01 to 5 parts by mass, per 100 parts by mass of the total amount of the precursor polymer P and the compound α used in the reaction.

[0100] Polymer 1 may form a mixture with unreacted compound α or a catalyst added to promote the reaction. The content of unreacted compound α contained in the mixture is preferably 3 parts by mass or less based on 100 parts by mass of the polymer.

[0101] Polymer 1 may be a crosslinked polymer or a non-crosslinked polymer. In one embodiment, polymer 1 is a non-crosslinked polymer (hereinafter, also referred to as polymer α). The gel fraction of polymer α may be 5% by mass or more.

[0102] Polymer α is a polymer in which the total number of structural units A, B, and C, relative to the total number of all structural units contained in the polymer (100%), is preferably 90% or more, more preferably 95% or more, and even more preferably 100%.

[0103] In one embodiment, polymer 1 and / or polymer 2 described below are crosslinked. That is, at least a portion of the molecules of polymer 1 and polymer 2 are linked intermolecularly by a covalent bond. Note that "polymer 1 is crosslinked" refers to either or both of the following: polymer 1 molecules are linked intermolecularly by a covalent bond; and polymer 1 and a polymer different from polymer 1 (which may be polymer 2 or a polymer other than polymers 1 and 2) are linked intermolecularly by a covalent bond.

[0104] Examples of methods for crosslinking a polymer include a method of crosslinking by irradiation with ionizing radiation and a method of crosslinking by using an organic peroxide.

[0105] When crosslinking a polymer by irradiating it with ionizing radiation, the ionizing radiation is usually irradiated to a polymer α that has been previously molded into a desired shape. Known methods are used for molding, with extrusion molding, injection molding, and press molding being preferred. The molded article to be irradiated with ionizing radiation may be a molded article containing only polymer 1 as the polymer component, or may be a molded article of a composition containing polymer 1 and a different polymer in addition to polymer 1. In the latter case, the polymer different from polymer 1 may be polymer 2, which will be described later. When the molded article contains polymer 1 and polymer 2, the content of polymer 1 is preferably 1 to 99 mass% based on the total amount of polymer 1 and polymer 2.

[0106] Examples of ionizing radiation include α-rays, β-rays, γ-rays, electron beams, neutron beams, and X-rays, and cobalt-60 γ-rays or electron beams are preferred. When the polymer-containing molded article is in the form of a sheet, the ionizing radiation may be irradiated from at least one side of the sheet-shaped molded article.

[0107] The irradiation with ionizing radiation is carried out using an ionizing radiation irradiation device, and the irradiation dose is usually 5 to 300 kGy, preferably 10 to 150 kGy. Polymer 1 can be obtained with a lower irradiation dose than usual to obtain a polymer with a high degree of crosslinking.

[0108] When obtaining a crosslinked polymer 1 by irradiation with ionizing radiation, if the molded article to be irradiated with ionizing radiation contains a crosslinking aid, it is possible to obtain a crosslinked polymer 1 with a higher degree of crosslinking. The crosslinking aid is used to increase the degree of crosslinking of the polymer 1 and improve the mechanical properties, and a compound having multiple double bonds in the molecule is preferably used.

[0109] Examples of crosslinking aids include N,N'-m-phenylene bismaleimide, toluylene bismaleimide, triallyl isocyanurate, triallyl cyanurate, p-quinone dioxime, nitrobenzene, diphenyl guanidine, divinylbenzene, ethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, trimethylolpropane triacrylate, and allyl methacrylate. These crosslinking aids may be used in combination.

[0110] The amount of the crosslinking aid added is preferably 0.01 to 4.0 parts by mass, and more preferably 0.05 to 2.0 parts by mass, per 100 parts by mass of the total amount of polymers contained in the molded article to be irradiated with ionizing radiation.

[0111] Examples of the crosslinking method using an organic peroxide include a method in which a composition containing polymer α, polymer 2, and an organic peroxide is subjected to a known molding method involving heating to crosslink polymer α. Known molding methods involving heating include extrusion molding, injection molding, and press molding.

[0112] When crosslinking is performed using an organic peroxide, an organic peroxide having a decomposition temperature equal to or higher than the flow initiation temperature of the resin component contained in the heat storage composition is preferably used. Examples of organic peroxides include dicumyl peroxide, 2,5-dimethyl-2,5-di-tert-butylperoxyhexane, 2,5-dimethyl-2,5-di-tert-butylperoxyhexyne, α,α-di-tert-butylperoxyisopropylbenzene, and tert-butylperoxy-2-ethylhexyl carbonate.

[0113] (Polymer 2) The heat storage composition and granules according to this embodiment may contain polymer 2, which is a polymer different from polymer 1. In one aspect, the melting peak temperature or glass transition temperature of polymer 2 is 50 to 180°C, preferably 60 to 170°C.

[0114] Examples of the polymer 2 having a melting peak temperature in the range of 50°C or higher and 180°C or lower include high-density polyethylene (HDPE), high-pressure low-density polyethylene (LDPE), ethylene-α-olefin copolymer, ethylene-vinyl acetate copolymer (EVA), and polypropylene (PP).

[0115] Examples of the polymer 2 having a glass transition temperature in the range of 50°C or higher and 180°C or lower include cyclic olefin polymer (COP), cyclic olefin copolymer (COC), polystyrene (PS), polyvinyl chloride (PVC), acrylonitrile-styrene copolymer (AS), acrylonitrile-butadiene-styrene copolymer (ABS), polymethyl methacrylate (PMMA), polyvinyl alcohol (PVA), polyethylene terephthalate (PET), polyacrylonitrile (PAN), polyamide 6 (PA6), polyamide 66 (PA66), polycarbonate (PC), polyphenylene sulfide (PPS), and polyether ether ketone (PEEK).

[0116] The ethylene-α-olefin copolymer as polymer 2 is a copolymer having structural units derived from ethylene and structural units derived from an α-olefin. Examples of the α-olefin include propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 4-methyl-1-pentene, and 4-methyl-1-hexene, and these may be used alone or in combination of two or more. The α-olefin is preferably an α-olefin having 4 to 8 carbon atoms, more preferably 1-butene, 1-hexene, or 1-octene.

[0117] The density of the high-density polyethylene, high-pressure low-density polyethylene, and ethylene-α-olefin copolymer as polymer 2 is 860 kg / m ３ More than 960kg / m ３ The following is the result.

[0118] Examples of polypropylene as polymer 2 include propylene homopolymers, propylene random copolymers such as those described below, and propylene polymer materials such as those described below. The content of structural units derived from propylene in the polypropylene is more than 50% by mass and not more than 100% by mass (where the total amount of structural units constituting the polypropylene is taken as 100% by mass). The polypropylene preferably has a peak melting temperature of 100°C or higher.

[0119] A propylene random copolymer is a random copolymer having structural units derived from propylene and at least one structural unit selected from the group consisting of structural units derived from ethylene and structural units derived from α-olefins. Examples of propylene random copolymers include propylene-ethylene random copolymers, propylene-ethylene-α-olefin random copolymers, and propylene-α-olefin random copolymers. The α-olefin is preferably an α-olefin having 4 to 10 carbon atoms, and examples of such α-olefins include linear α-olefins such as 1-butene, 1-pentene, 1-hexene, 1-octene, and 1-decene, and branched α-olefins such as 3-methyl-1-butene and 3-methyl-1-pentene. The α-olefin contained in the propylene random copolymer may be one type or two or more types.

[0120] Examples of methods for producing propylene homopolymers and propylene random copolymers include polymerization methods such as slurry polymerization, solution polymerization, bulk polymerization, and gas phase polymerization using Ziegler-Natta catalysts or complex catalysts such as metallocene complexes and non-metallocene complexes.

[0121] The propylene polymerization material is a polymerization material comprising a propylene homopolymer component (I) and an ethylene copolymer component (II) having at least one structural unit selected from the group consisting of structural units derived from propylene and structural units derived from an α-olefin having 4 or more carbon atoms, and a structural unit derived from ethylene.

[0122] Examples of the α-olefin having 4 or more carbon atoms in the ethylene copolymer component (II) include 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-undecene, 1-dodecene, 1-tridecene, 1-tetradecene, 1-pentadecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1-nonadecene, 1-eicosene, 3-methyl-1-butene, 3-methyl-1-pentene, 4-methyl-1-pentene, 2-ethyl-1-hexene, and 2,2,4-trimethyl-1-pentene. The α-olefin having 4 or more carbon atoms is preferably an α-olefin having from 4 to 20 carbon atoms, more preferably an α-olefin having from 4 to 10 carbon atoms, and even more preferably 1-butene, 1-hexene, or 1-octene. The α-olefin having 4 or more carbon atoms contained in the ethylene copolymer component (II) may be one type or two or more types.

[0123] Examples of the ethylene copolymer component (II) include a propylene-ethylene copolymer, an ethylene-1-butene copolymer, an ethylene-1-hexene copolymer, an ethylene-1-octene copolymer, a propylene-ethylene-1-butene copolymer, a propylene-ethylene-1-hexene copolymer, and a propylene-ethylene-1-octene copolymer. The ethylene copolymer component (II) may be a random copolymer or a block copolymer.

[0124] The propylene polymer material can be produced by multi-stage polymerization using a polymerization catalyst. For example, the propylene polymer material can be produced by producing a propylene homopolymer component (I) in a first polymerization step and producing an ethylene copolymer component (II) in a second polymerization step.

[0125] The polymerization catalysts used in the production of propylene polymer materials include catalysts used in the production of propylene homopolymers and propylene random copolymers.

[0126] Polymerization methods used in each polymerization step in the production of a propylene polymerization material include bulk polymerization, solution polymerization, slurry polymerization, and gas-phase polymerization. Examples of inert hydrocarbon solvents used in solution polymerization and slurry polymerization include propane, butane, isobutane, pentane, hexane, heptane, and octane. Two or more of these polymerization methods may be combined, and may be either batch or continuous. Preferred polymerization methods for the production of a propylene polymerization material are continuous gas-phase polymerization and bulk-gas-phase polymerization, in which bulk polymerization and gas-phase polymerization are performed continuously.

[0127] The polypropylene as polymer 2 is preferably a propylene homopolymer.

[0128] In one embodiment, polymer 2 has structural units A and C, where structural units A and C are as described for polymer 1. Polymer 2 is preferably a polymer in which the number of structural units A is 0 to 99% and the total number of structural units C is 1 to 100%, relative to 100% in total of structural units A and structural units C, and more preferably a polymer in which the number of structural units A is 70 to 99% and the total number of structural units C is 1 to 30%.

[0129] Examples of polymer 2 include acrylic acid polymers, methacrylic acid polymers, vinyl alcohol polymers, methyl acrylate polymers, ethyl acrylate polymers, n-propyl acrylate polymers, n-butyl acrylate polymers, methyl methacrylate polymers, ethyl methacrylate polymers, n-propyl methacrylate polymers, n-butyl methacrylate polymers, vinyl formate polymers, vinyl acetate polymers, vinyl propionate polymers, vinyl (n-butylate) polymers, methyl vinyl ether polymers, ethyl vinyl ether polymers, n-propyl vinyl ether polymers, n-butyl vinyl ether polymers, maleic anhydride polymers, glycidyl acrylate polymers, glycidyl methacrylate polymers, 3-(dimethylamino)propyl acrylate polymers, 3-(dimethylamino)propyl methacrylate polymers, ethylene-acrylic acid copolymers, ethylene-methacrylic acid copolymers, ethylene-vinyl alcohol copolymers, ethylene-methyl acrylate copolymers, ethylene Examples of the copolymer include ethylene-ethyl acrylate copolymer, ethylene-n-propyl acrylate copolymer, ethylene-n-butyl acrylate copolymer, ethylene-methyl methacrylate copolymer, ethylene-ethyl methacrylate copolymer, ethylene-n-propyl methacrylate copolymer, ethylene-n-butyl methacrylate copolymer, ethylene-vinyl formate copolymer, ethylene-vinyl acetate copolymer, ethylene-vinyl propionate copolymer, ethylene-vinyl (n-butylate) copolymer, ethylene-methyl vinyl ether copolymer, ethylene-ethyl vinyl ether copolymer, ethylene-n-propyl vinyl ether copolymer, ethylene-n-butyl vinyl ether copolymer, ethylene-maleic anhydride copolymer, ethylene-glycidyl acrylate copolymer, ethylene-glycidyl methacrylate copolymer, ethylene-3-(dimethylamino)propyl acrylate copolymer, and ethylene-3-(dimethylamino)propyl methacrylate copolymer.

[0130] Polymer 2 is preferably an ethylene-based copolymer. The amount of ethylene structural units in the ethylene-based copolymer is preferably 50 to 99 mass %. Examples of the ethylene-based copolymer include an ethylene-unsaturated carboxylic acid copolymer, an ethylene-vinyl alcohol copolymer, an ethylene-unsaturated carboxylic acid ester copolymer, an ethylene-vinyl carboxylate copolymer, and an ethylene-alkyl vinyl ether copolymer.

[0131] Examples of the ethylene-unsaturated carboxylic acid copolymer include ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, and ethylene-maleic anhydride copolymer.

[0132] Examples of ethylene-unsaturated carboxylic acid ester copolymers include ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-n-propyl acrylate copolymer, ethylene-n-butyl acrylate copolymer, ethylene-methyl methacrylate copolymer, ethylene-ethyl methacrylate copolymer, ethylene-n-propyl methacrylate copolymer, ethylene-n-butyl methacrylate copolymer, ethylene-glycidyl acrylate copolymer, ethylene-glycidyl methacrylate copolymer, ethylene-3-(dimethylamino)propyl acrylate copolymer, and ethylene-3-(dimethylamino)propyl methacrylate copolymer.

[0133] Examples of ethylene-vinyl carboxylate copolymers include ethylene-vinyl formate copolymers, ethylene-vinyl acetate copolymers, ethylene-vinyl propionate copolymers, and ethylene-vinyl (n-butylate) copolymers.

[0134] Polymer 2 is more preferably an ethylene-unsaturated carboxylic acid copolymer and an ethylene-unsaturated carboxylic acid ester copolymer, and even more preferably an ethylene-acrylic acid copolymer, an ethylene-methacrylic acid copolymer, an ethylene-vinyl alcohol copolymer, an ethylene-methyl acrylate copolymer, an ethylene-ethyl acrylate copolymer, an ethylene-n-propyl acrylate copolymer, an ethylene-n-butyl acrylate copolymer, an ethylene-methyl methacrylate copolymer, an ethylene-ethyl methacrylate copolymer, an ethylene-n-propyl methacrylate copolymer, or an ethylene-n-butyl methacrylate copolymer.

[0135] From the viewpoint of moldability, the polymer 2 preferably has a melt flow rate (MFR) of 0.1 to 100 g / 10 min, more preferably 0.1 to 30 g / 10 min, as measured in accordance with JIS K7210 at a temperature of 190°C and a load of 21 N.

[0136] (Low Molecular Weight Compound) The thermal storage composition and granules according to this embodiment may contain a low molecular weight compound (hereinafter, sometimes referred to as "compound L") having a molecular weight of 2000 or less. Compound L may be a compound containing one or more structural units (repeating units) in the molecule, as long as it has a molecular weight of 2000 or less.

[0137] The molecular weight of compound L is preferably 290 to 1000, more preferably 290 to 600. Compound L may be a "polymer" such as a dimer. Compound L may have a melting peak temperature (highest crystalline transition temperature) within the range of 0 to 100°C, and the melting peak temperature is preferably within the range of 10 to 80°C, more preferably 10 to 60°C.

[0138] Examples of compound L include organic low-molecular-weight substances. Examples of organic low-molecular-weight substances include paraffin, long-chain fatty acids, long-chain alcohols, long-chain fatty acid esters, and sugar alcohols. These may be encapsulated in organic microcapsules, fixed with a gelling agent, or encapsulated in a container such as a plastic.

[0139] The compound L is preferably C１４～３０ (having 14 to 30 carbon atoms) alkyl group. １４～３０ The alkyl group of １４～３０ and C １４～３０ Preferably, the branched alkyl group is C １４～３０ and more preferably a straight chain alkyl group of C １４～２４ and more preferably C １６～２２ is a straight chain alkyl group.

[0140] C １４～３０ Examples of the straight-chain alkyl group include an n-tetradecyl group, an n-pentadecyl group, an n-hexadecyl group, an n-heptadecyl group, an n-octadecyl group, an n-nonadecyl group, an n-eicosyl group, an n-heneicosyl group, an n-docosyl group, an n-tricosyl group, an n-tetracosyl group, an n-pentacosyl group, an n-hexacosyl group, an n-heptacosyl group, an n-octacosyl group, an n-nonacosyl group, and an n-triacontyl group.

[0141] C １４～３０ Examples of the branched alkyl group include an isotetradecyl group, an isopentadecyl group, an isohexadecyl group, an isoheptadecyl group, an isooctadecyl group, an isononadecyl group, an isoeicosyl group, an isoheneicosyl group, an isodocosyl group, an isotricosyl group, an isotetracosyl group, an isopentacosyl group, an isohexacosyl group, an isoheptacosyl group, an isooctacosyl group, an isononacosyl group, and an isotriacontyl group.

[0142] Compound L may be at least one heat storage material selected from the group consisting of hydrocarbons, fatty acids, fatty acid salts, fatty acid esters, aliphatic ethers, aliphatic ketones, aliphatic alcohols, and aliphatic amides. Compound L may also be a mixture of two or more compounds (which may be the same or different) selected from the above compounds.

[0143] The hydrocarbon is preferably a linear saturated hydrocarbon, a linear unsaturated hydrocarbon, a branched saturated hydrocarbon, or a branched unsaturated hydrocarbon, and particularly preferably a linear saturated hydrocarbon. Examples of linear saturated hydrocarbons include n-tetradecane, n-pentadecane, n-hexadecane, n-heptadecane, n-octadecane, n-nonadecane, n-eicosane, n-henicosane, n-docosane, n-tricosane, n-tetracosane, n-pentacosane, n-hexacosane, n-peptacosane, n-octacosane, n-nonacosane, and n-triacontane. The hydrocarbon also includes various paraffin compounds.

[0144] The fatty acid is preferably a linear saturated fatty acid, a linear unsaturated fatty acid, a branched saturated fatty acid, or a branched unsaturated fatty acid, and particularly preferably a linear saturated fatty acid. Examples of linear saturated fatty acids include n-tetradecanoic acid, n-hexadecanoic acid, n-octadecanoic acid, n-eicosanoic acid, n-henicosanoic acid, n-docosanoic acid, n-tricosanoic acid, n-tetracosanoic acid, n-pentacosanoic acid, n-hexacosanoic acid, n-heptacosanoic acid, n-octacosanoic acid, n-nonacosanoic acid, and n-triacontanoic acid.

[0145] Examples of fatty acid salts include sodium salts, potassium salts, and ammonium salts of the above fatty acids.

[0146] The fatty acid ester is preferably a linear saturated fatty acid ester, a linear unsaturated fatty acid ester, a branched saturated fatty acid ester, or a branched unsaturated fatty acid ester, and particularly preferably a linear saturated fatty acid ester.

[0147] Examples of linear saturated fatty acid esters include the following compounds: tetradecyl n-methanoate, hexadecyl n-methanoate, octadecyl n-methanoate, eicosyl n-methanoate, docosyl n-methanoate, tetracosyl n-methanoate, hexacosyl n-methanoate, octacosyl n-methanoate, triacontyl n-methanoate; tetradecyl n-ethanoate, hexadecyl n-ethanoate, octadecyl n-ethanoate, eicosyl n-ethanoate, docosyl n-ethanoate, tetracosyl n-ethanoate, hexacosyl n-ethanoate, octacosyl n-ethanoate Cutacosyl, triacontyl n-ethanoate; tetradecyl n-propanoate, hexadecyl n-propanoate, octadecyl n-propanoate, eicosyl n-propanoate, docosyl n-propanoate, tetracosyl n-propanoate, hexacosyl n-propanoate, octacosyl n-propanoate, triacontyl n-propanoate; tetradecyl n-butanoate, hexadecyl n-butanoate, octadecyl n-butanoate, eicosyl n-butanoate, docosyl n-butanoate, n-butanoate tetracosyl n-pentanoate, hexacosyl n-butanoate, octacosyl n-butanoate, triacontyl n-butanoate; tetradecyl n-pentanoate, hexadecyl n-pentanoate, octadecyl n-pentanoate, eicosyl n-pentanoate, docosyl n-pentanoate, tetracosyl n-pentanoate, hexacosyl n-pentanoate, octacosyl n-pentanoate, triacontyl n-pentanoate; tetradecyl n-hexanoate, hexadecyl n-hexanoate, octacosyl n-pentanoate Tadecyl, eicosyl n-hexanoate, docosyl n-hexanoate, tetracosyl n-hexanoate, hexacosyl n-hexanoate, octacosyl n-hexanoate, triacontyl n-hexanoate; tetradecyl n-heptanoate, hexadecyl n-heptanoate, octadecyl n-heptanoate, eicosyl n-heptanoate, docosyl n-heptanoate, tetracosyl n-heptanoate, hexacosyl n-heptanoate, octacosyl n-heptanoate, triacontyl n-heptanoate;Tetradecyl n-octanoate, hexadecyl n-octanoate, octadecyl n-octanoate, eicosyl n-octanoate, docosyl n-octanoate, tetracosyl n-octanoate, hexacosyl n-octanoate, octacosyl n-octanoate, triacontyl n-octanoate; tetradecyl n-nonanoate, hexadecyl n-nonanoate, octadecyl n-nonanoate, eicosyl n-nonanoate, docosyl n-nonanoate, n-nonanoic acid Tetracosyl, hexacosyl n-nonanoate, octacosyl n-nonanoate, triacontyl n-nonanoate; tetradecyl n-decanoate, hexadecyl n-decanoate, octadecyl n-decanoate, eicosyl n-decanoate, docosyl n-decanoate, tetracosyl n-decanoate, hexacosyl n-decanoate, octacosyl n-decanoate, triacontyl n-decanoate; tetradecyl n-dodecanoate, hexadecyl n-dodecanoate, n- Octadecyl dodecanoate, eicosyl n-dodecanoate, docosyl n-dodecanoate, tetracosyl n-dodecanoate, hexacosyl n-dodecanoate, octacosyl n-dodecanoate, triacontyl n-dodecanoate; methyl n-tetradecanoate, ethyl n-tetradecanoate, propyl n-tetradecanoate, butyl n-tetradecanoate, pentyl n-tetradecanoate, hexyl n-tetradecanoate, heptyl n-tetradecanoate, n-tetradecanoate Octyl tetradecanoate, nonyl n-tetradecanoate, decyl n-tetradecanoate, dodecyl n-tetradecanoate, tetradecyl n-hexadecanoate, hexadecyl n-tetradecanoate, octadecyl n-tetradecanoate, eicosyl n-tetradecanoate, docosyl n-tetradecanoate, tetracosyl n-tetradecanoate, hexacosyl n-tetradecanoate, octacosyl n-tetradecanoate, triacontyl n-tetradecanoate;Methyl n-hexadecanoate, ethyl n-hexadecanoate, propyl n-hexadecanoate, butyl n-hexadecanoate, pentyl n-hexadecanoate, hexyl n-hexadecanoate, heptyl n-hexadecanoate, octyl n-hexadecanoate, nonyl n-hexadecanoate, decyl n-hexadecanoate, dodecyl n-hexadecanoate, tetradecyl n-hexadecanoate, hexadecyl n-hexadecanoate, octadecyl n-hexadecanoate, eicosyl n-hexadecanoate, -docosyl hexadecanoate, tetracosyl n-hexadecanoate, hexacosyl n-hexadecanoate, octacosyl n-hexadecanoate, triacontyl n-hexadecanoate; methyl n-octadecanoate, ethyl n-octadecanoate, propyl n-octadecanoate, butyl n-octadecanoate, pentyl n-octadecanoate, hexyl n-octadecanoate, heptyl n-octadecanoate, octyl n-octadecanoate, nonyl n-octadecanoate, decyl n-octadecanoate, Dodecyl n-octadecanoate, tetradecyl n-octadecanoate, hexadecyl n-octadecanoate, octadecyl n-octadecanoate, eicosyl n-octadecanoate, docosyl n-octadecanoate, tetracosyl n-octadecanoate, hexacosyl n-octadecanoate, octacosyl n-octadecanoate, triacontyl n-octadecanoate; methyl n-eicosanoate, ethyl n-eicosanoate, propyl n-eicosanoate, butyl n-eicosanoate, n-eicosanoic acid Pentyl, hexyl n-eicosanoate, heptyl n-eicosanoate, octyl n-eicosanoate, nonyl n-eicosanoate, decyl n-eicosanoate, dodecyl n-eicosanoate, tetradecyl n-eicosanoate, hexadecyl n-eicosanoate, octadecyl n-eicosanoate, eicosyl n-eicosanoate, docosyl n-eicosanoate, tetracosyl n-eicosanoate, hexacosyl n-eicosanoate, octacosyl n-eicosanoate, triacontyl n-eicosanoate;Methyl n-docosanoate, ethyl n-docosanoate, propyl n-docosanoate, butyl n-docosanoate, pentyl n-docosanoate, hexyl n-docosanoate, heptyl n-docosanoate, octyl n-docosanoate, nonyl n-docosanoate, decyl n-docosanoate, dodecyl n-docosanoate, tetradecyl n-docosanoate, hexadecyl n-docosanoate, octadecyl n-docosanoate, eicosyl n-docosanoate, docosyl n-docosanoate, tetracosyl n-docosanoate, Hexacosyl n-docosanoate, octacosyl n-docosanoate, triacontyl n-docosanoate; methyl n-tetracosanoate, ethyl n-tetracosanoate, propyl n-tetracosanoate, butyl n-tetracosanoate, pentyl n-tetracosanoate, hexyl n-tetracosanoate, heptyl n-tetracosanoate, octyl n-tetracosanoate, nonyl n-tetracosanoate, decyl n-tetracosanoate, dodecyl n-tetracosanoate, tetradecyl n-tetracosanoate, Hexadecyl n-tetracosanoate, octadecyl n-tetracosanoate, eicosyl n-tetracosanoate, docosyl n-tetracosanoate, tetracosyl n-tetracosanoate, hexacosyl n-tetracosanoate, octacosyl n-tetracosanoate, triacontyl n-tetracosanoate; methyl n-hexacosanoate, ethyl n-hexacosanoate, propyl n-hexacosanoate, butyl n-hexacosanoate, pentyl n-hexacosanoate, hexyl n-hexacosanoate, n -heptyl hexacosanoate, octyl n-hexacosanoate, nonyl n-hexacosanoate, decyl n-hexacosanoate, dodecyl n-hexacosanoate, tetradecyl n-hexacosanoate, hexadecyl n-hexacosanoate, octadecyl n-hexacosanoate, eicosyl n-hexacosanoate, docosyl n-hexacosanoate, tetracosyl n-hexacosanoate, hexacosyl n-hexacosanoate, octacosyl n-hexacosanoate, triacontyl n-hexacosanoate;Methyl n-octacosanoate, ethyl n-octacosanoate, propyl n-octacosanoate, butyl n-octacosanoate, pentyl n-octacosanoate, hexyl n-octacosanoate, heptyl n-octacosanoate, octyl n-octacosanoate, nonyl n-octacosanoate, decyl n-octacosanoate, dodecyl n-octacosanoate, tetradecyl n-octacosanoate, hexadecyl n-octacosanoate, octadecyl n-octacosanoate, eicosyl n-octacosanoate, docosyl n-octacosanoate, tetracosyl n-octacosanoate, hexacosyl n-octacosanoate, octacosyl n-octacosanoate, triacontyl n-octacosanoate; n-triacontanoic acid Methyl, ethyl n-triacontanoate, propyl n-triacontanoate, butyl n-triacontanoate, pentyl n-triacontanoate, hexyl n-triacontanoate, heptyl n-triacontanoate, octyl n-triacontanoate, nonyl n-triacontanoate, decyl n-triacontanoate, dodecyl n-triacontanoate, tetradecyl n-triacontanoate, hexadecyl n-triacontanoate, octadecyl n-triacontanoate, eicosyl n-triacontanoate, docosyl n-triacontanoate, tetracosyl n-triacontanoate, hexacosyl n-triacontanoate, octacosyl n-triacontanoate, triacontyl n-triacontanoate;

[0148] The linear saturated fatty acid ester may be a compound in which a plurality of fatty acid esters are bonded together, such as triacylglycerol.

[0149] The aliphatic ether is preferably a linear saturated aliphatic ether, a linear unsaturated aliphatic ether, a branched saturated aliphatic ether or a branched unsaturated aliphatic ether, and particularly preferably a linear saturated aliphatic ether.

[0150] Examples of linear saturated aliphatic ethers include the following compounds: n-tetradecyl methyl ether, n-tetradecyl ethyl ether, n-tetradecyl propyl ether, n-tetradecyl butyl ether, n-tetradecyl pentyl ether, n-tetradecyl hexyl ether, n-tetradecyl heptyl ether, n-tetradecyl octyl ether, n-tetradecyl nonyl ether, n-tetradecyl decyl ether, n-tetradecyl dodecyl ether, n-ditetradecyl ether, n-tetradecyl hexadecyl ether, n-tetradecyl octadecyl ether, n-tetradecyl eicosyl ether, n-tetradecyl docosyl ether, n-tetradecyl tetracosyl ether, n-tetradecyl hexacosyl ether, n-tetradecyl octacosyl ether, and n-tetradecyl tridecyl ether. acontyl ether; n-hexadecyl methyl ether, n-hexadecyl ethyl ether, n-hexadecyl propyl ether, n-hexadecyl butyl ether, n-hexadecyl pentyl ether, n-hexadecyl hexyl ether, n-hexadecyl heptyl ether, n-hexadecyl octyl ether, n-hexadecyl nonyl ether, n-hexadecyl decyl ether, n-hexadecyl dodecyl ether, n-dihexadecyl ether, n-hexadecyl octadecyl ether, n-hexadecyl eicosyl ether, n-hexadecyl docosyl ether, n-hexadecyl tetracosyl ether, n-hexadecyl hexacosyl ether, n-hexadecyl octacosyl ether, n-hexadecyl triacontyl ether;n-Octadecyl methyl ether, n-octadecyl ethyl ether, n-octadecyl propyl ether, n-octadecyl butyl ether, n-octadecyl pentyl ether, n-octadecyl hexyl ether, n-octadecyl heptyl ether, n-octadecyl octyl ether, n-octadecyl nonyl ether, n-octadecyl decyl ether, n-octadecyl dodecyl ether, n-dioctadecyl ether, n-octadecyl ether eicosyl ether, n-octadecyl docosyl ether, n-octadecyl tetracosyl ether, n-octadecyl hexacosyl ether, n-octadecyl octacosyl ether, n-octadecyl triacontyl ether; n-eicosyl methyl ether, n-eicosyl ethyl ether, n-eicosyl propyl ether, n-eicosyl butyl ether, n-eicosyl pentyl ether, n-eicosyl hexyl ether, n-eicosyl heptyl ether, n-eicosyl octyl ether, n-eicosyl nonyl ether, n-eicosyl decyl ether, n-eicosyl dodecyl ether, n-dieicosyl ether, n-eicosyl docosyl ether, n-eicosyl tetracosyl ether, n-eicosyl hexacosyl ether, n-eicosyl octacosyl ether, n-eicosyl triacontyl ether; n-docosyl methyl ether, n-docosyl ethyl ether, n-docosyl propyl propyl ether, n-docosyl butyl ether, n-docosyl pentyl ether, n-docosyl hexyl ether, n-docosyl heptyl ether, n-docosyl octyl ether, n-docosyl nonyl ether, n-docosyl decyl ether, n-docosyl dodecyl ether, n-didocosyl ether, n-docosyl tetracosyl ether, n-docosyl hexacosyl ether, n-docosyl octacosyl ether, n-docosyl triacontyl ether;n-Tetracosyl methyl ether, n-tetracosyl ethyl ether, n-tetracosyl propyl ether, n-tetracosyl butyl ether, n-tetracosyl pentyl ether, n-tetracosyl hexyl ether, n-tetracosyl heptyl ether, n-tetracosyl octyl ether, n-tetracosyl nonyl ether, n-tetracosyl decyl ether, n-tetracosyl dodecyl ether, n-ditetracosyl ether, n-tetracosyl hexacosyl ether, n-tetracosyl octacosyl n-hexacosyl methyl ether, n-hexacosyl ethyl ether, n-hexacosyl propyl ether, n-hexacosyl butyl ether, n-hexacosyl pentyl ether, n-hexacosyl hexyl ether, n-hexacosyl heptyl ether, n-hexacosyl octyl ether, n-hexacosyl nonyl ether, n-hexacosyl decyl ether, n-hexacosyl dodecyl ether, n-dihexacosyl ether, n-hexacosyl octacosyl ether, n-hexacosyl triacontyl ether; n-octacosyl methyl ether, n-octacosyl ethyl ether, n-octacosyl propyl ether, n-octacosyl butyl ether, n-octacosyl pentyl ether, n-octacosyl hexyl ether, n-octacosyl heptyl ether, n-octacosyl octyl ether, n-octacosyl nonyl ether, n-octacosyl decyl ether, n-octacosyl dodecyl ether, n-dioctacosyl ether , n-octacosyl triacontyl ether; n-triacontyl methyl ether, n-triacontyl ethyl ether, n-triacontyl propyl ether, n-triacontyl butyl ether, n-triacontyl pentyl ether, n-triacontyl hexyl ether, n-triacontyl heptyl ether, n-triacontyl octyl ether, n-triacontyl nonyl ether, n-triacontyl decyl ether, n-triacontyl dodecyl ether, n-ditriacontyl ether;

[0151] The aliphatic ketone is preferably a linear saturated aliphatic ketone, a linear unsaturated aliphatic ketone, a branched saturated aliphatic ketone, or a branched unsaturated aliphatic ketone, and particularly preferably a linear saturated aliphatic ketone.

[0152] Examples of linear saturated aliphatic ketones include the following compounds: n-tetradecyl methyl ketone, n-tetradecyl ethyl ketone, n-tetradecyl propyl ketone, n-tetradecyl butyl ketone, n-tetradecyl pentyl ketone, n-tetradecyl hexyl ketone, n-tetradecyl heptyl ketone, n-tetradecyl octyl ketone, n-tetradecyl nonyl ketone, n-tetradecyl decyl ketone, n-tetradecyl dodecyl ketone, n-ditetradecyl ketone, n-tetradecyl hexadecyl ketone, n-tetradecyl octadecyl ketone, and n-tetradecyl eicosanol. Silica ketone, n-tetradecyl docosyl ketone, n-tetradecyl tetracosyl ketone, n-tetradecyl hexacosyl ketone, n-tetradecyl octacosyl ketone, n-tetradecyl triacontyl ketone; n-hexadecyl methyl ketone, n-hexadecyl ethyl ketone, n-hexadecyl propyl ketone, n-hexadecyl butyl ketone, n-hexadecyl pentyl ketone, n-hexadecyl hexyl ketone, n-hexadecyl heptyl ketone, n-hexadecyl octyl ketone, n-hexadecyl nonyl Ketone, n-hexadecyl decyl ketone, n-hexadecyl dodecyl ketone, n-dihexadecyl ketone, n-hexadecyl octadecyl ketone, n-hexadecyl eicosyl ketone, n-hexadecyl docosyl ketone, n-hexadecyl tetracosyl ketone, n-hexadecyl hexacosyl ketone, n-hexadecyl octacosyl ketone, n-hexadecyl triacontyl ketone; n-octadecyl methyl ketone, n-octadecyl ethyl ketone, n-octadecyl propyl ketone, n-octadecyl butyl ketone n-octadecyl pentyl ketone, n-octadecyl hexyl ketone, n-octadecyl heptyl ketone, n-octadecyl octyl ketone, n-octadecyl nonyl ketone, n-octadecyl decyl ketone, n-octadecyl dodecyl ketone, n-dioctadecyl ketone, n-octadecyl eicosyl ketone, n-octadecyl docosyl ketone, n-octadecyl tetracosyl ketone, n-octadecyl hexacosyl ketone, n-octadecyl octacosyl ketone, n-octadecyl triacontyl ketone;n-Eicosyl methyl ketone, n-Eicosyl ethyl ketone, n-Eicosyl propyl ketone, n-Eicosyl butyl ketone, n-Eicosyl pentyl ketone, n-Eicosyl hexyl ketone, n-Eicosyl heptyl ketone, n-Eicosyl octyl ketone, n-Eicosyl nonyl ketone, n-Eicosyl decyl ketone, n-Eicosyl dodecyl ketone, n-Diicosyl ketone, n-Eicosyl docosyl ketone, n-Eicosyl tetracosyl ketone, n-Eicosyl hexacosyl ketone, n-Eicosyl octacosyl ketone ketone, n-eicosyl triacontyl ketone; n-docosyl methyl ketone, n-docosyl ethyl ketone, n-docosyl propyl ketone, n-docosyl butyl ketone, n-docosyl pentyl ketone, n-docosyl hexyl ketone, n-docosyl heptyl ketone, n-docosyl octyl ketone, n-docosyl nonyl ketone, n-docosyl decyl ketone, n-docosyl dodecyl ketone, n-didocosyl ketone, n-docosyl tetracosyl ketone, n-docosyl hexacosyl ketone, n-docosyl octacosyl ketone, n-docosyl Triacontyl ketone; n-tetracosyl methyl ketone, n-tetracosyl ethyl ketone, n-tetracosyl propyl ketone, n-tetracosyl butyl ketone, n-tetracosyl pentyl ketone, n-tetracosyl hexyl ketone, n-tetracosyl heptyl ketone, n-tetracosyl octyl ketone, n-tetracosyl nonyl ketone, n-tetracosyl decyl ketone, n-tetracosyl dodecyl ketone, n-ditetracosyl ketone, n-tetracosyl hexacosyl ketone, n-tetracosyl octacosyl ketone, n-tetracosyl lacosyl triacontyl ketone; n-hexacosyl methyl ketone, n-hexacosyl ethyl ketone, n-hexacosyl propyl ketone, n-hexacosyl butyl ketone, n-hexacosyl pentyl ketone, n-hexacosyl hexyl ketone, n-hexacosyl heptyl ketone, n-hexacosyl octyl ketone, n-hexacosyl nonyl ketone, n-hexacosyl decyl ketone, n-hexacosyl dodecyl ketone, n-dihexacosyl ketone, n-hexacosyl octacosyl ketone, n-hexacosyl triacontyl ketone;n-Octacosyl methyl ketone, n-Octacosyl ethyl ketone, n-Octacosyl propyl ketone, n-Octacosyl butyl ketone, n-Octacosyl pentyl ketone, n-Octacosyl hexyl ketone, n-Octacosyl heptyl ketone, n-Octacosyl octyl ketone, n-Octacosyl nonyl ketone, n-Octacosyl decyl ketone, n-Octacosyl dodecyl ketone, n-Dioctacosyl ketone, n-Octacosyl triacontyl Ketones: n-triacontyl methyl ketone, n-triacontyl ethyl ketone, n-triacontyl propyl ketone, n-triacontyl butyl ketone, n-triacontyl pentyl ketone, n-triacontyl hexyl ketone, n-triacontyl heptyl ketone, n-triacontyl octyl ketone, n-triacontyl nonyl ketone, n-triacontyl decyl ketone, n-triacontyl dodecyl ketone, n-ditriacontyl ketone;

[0153] The aliphatic alcohol is preferably a linear saturated aliphatic alcohol, a linear unsaturated aliphatic alcohol, a branched saturated aliphatic alcohol, or a branched unsaturated aliphatic alcohol, and particularly preferably a linear saturated aliphatic alcohol.

[0154] Examples of linear saturated aliphatic alcohols include n-tetradecyl alcohol, n-pentadecyl alcohol, n-hexadecyl alcohol, n-heptadecyl alcohol, n-octadecyl alcohol, n-nonadecyl alcohol, n-eicosyl alcohol, n-heneicosyl alcohol, n-docosyl alcohol, n-tricosyl alcohol, n-tetracosyl alcohol, n-pentacosyl alcohol, n-hexacosyl alcohol, n-heptacosyl alcohol, n-octacosyl alcohol, n-nonacosyl alcohol, and n-triacontyl alcohol.

[0155] The aliphatic amide is preferably a linear saturated aliphatic amide, a linear unsaturated aliphatic amide, a branched saturated aliphatic amide, or a branched unsaturated aliphatic amide, and particularly preferably a linear saturated aliphatic amide.

[0156] Examples of linear saturated aliphatic amides include n-tetradecylamine, n-pentadecylamine, n-hexadecylamine, n-heptadecylamine, n-octadecylamine, n-nonadecylamine, n-eicosylamine, n-heneicosylamine, n-docosylamine, n-tricosylamine, n-tetracosylamine, n-pentacosylamine, n-hexacosylamine, n-heptacosylamine, n-octacosylamine, n-nonacosylamine, and n-triacontylamine.

[0157] From the viewpoint of maintaining the shape of the granules, the content of compound L contained in the granules may be 3 parts by mass or more and 1,000 parts by mass or less per 100 parts by mass of polymer 1, preferably 5 parts by mass or more and 100 parts by mass or less, and more preferably 10 parts by mass or more and 50 parts by mass or less.

[0158] The heat storage composition and granules may contain known additives as needed, such as inorganic fillers, organic fillers, flame retardants, antioxidants, weathering agents, ultraviolet absorbers, heat stabilizers, light stabilizers, lubricants, antiblocking agents, antistatic agents, antifogging agents, anti-dripping agents, crystal nucleating agents, pigments, dyes, adsorbents, metal chlorides, hydrotalcites, aluminates, silicone compounds, antibacterial agents, deodorizers, light-absorbing heat-generating materials, moisture-absorbing heat-generating materials, and far-infrared heat-generating materials.

[0159] Inorganic fillers include, for example, talc, calcium carbonate, and calcined kaolin. Organic fillers include, for example, fiber, wood flour, and cellulose powder. Pigments include, for example, titanium dioxide and carbon black. Metal chlorides include, for example, iron chloride and calcium chloride. Adsorbents include, for example, metal oxides such as zinc oxide and magnesium oxide.

[0160] Examples of antioxidants include phenol-based antioxidants, sulfur-based antioxidants, phosphorus-based antioxidants, lactone-based antioxidants, and vitamin-based antioxidants. Examples of ultraviolet absorbers include benzotriazole-based ultraviolet absorbers, tridiamine-based ultraviolet absorbers, anilide-based ultraviolet absorbers, and benzophenone-based ultraviolet absorbers. Examples of light stabilizers include hindered amine-based light stabilizers and benzoate-based light stabilizers. Examples of lubricants include fatty acids, higher alcohols, aliphatic amides, and aliphatic esters.

[0161] When the heat storage composition contains an additive, the additive may be blended in advance with one or more raw materials used in the production process of the heat storage composition, or may be blended after the heat storage composition is produced. When the production includes a crosslinking step of a polymer, the additive may be blended with the polymer before crosslinking, or may be blended after crosslinking. When blending the additive into the heat storage composition after production of the heat storage composition, the additive can be blended while melt-kneading the heat storage composition.

[0162] The amount of the additive to be added is preferably 0.001 to 10 parts by mass, more preferably 0.005 to 5 parts by mass, and even more preferably 0.01 to 1 part by mass, per 100 parts by mass of the heat storage composition.

[0163] The heat storage composition may be produced by first melt-kneading polymer 1 and, if necessary, polymer 2, compound L, other additives, etc. to prepare a high-concentration master batch, and then adding compound L and / or polymer 1 and melt-kneading the mixture to produce the composition.

[0164] The heat storage composition may be produced by simply mixing compound L and polymer 1, and, if necessary, other additives, etc.; it may be produced by dissolving compound L in a solvent and then mixing polymer 1 and, if necessary, other additives, etc.; it may be produced by dissolving polymer 1 in a solvent and then mixing compound L and, if necessary, other additives, etc.; it may be produced by mixing compound L and polymer 1 with a solvent or a solution in which, if necessary, other additives, etc. are dissolved in a solvent; or it may be produced by mixing a solution in which compound L is dissolved in a solvent with a solution in which polymer 1 and, if necessary, other additives, etc. are dissolved in a solvent.

[0165] The heat storage composition may be produced by first simply mixing Compound L and Polymer 1 with, if necessary, other additives, or dissolving them in a solvent and then mixing them to prepare a high-concentration master batch, and then adding Compound L or Polymer 1 as is or after dissolving it in a solvent if necessary, and mixing the resulting mixture.

[0166] The heat storage composition may be produced by mixing a monomer or prepolymer of polymer 1 with other additives as needed, and then polymerizing the resulting mixture. Examples of the polymerization method include bulk polymerization, cast polymerization, solution polymerization, suspension polymerization, and emulsion polymerization.

[0167] (Granulation of Molded Product) The molded product containing polymer 1 produced by molding the heat storage composition can be granulated by crushing it.

[0168] The method for molding the heat storage composition is not particularly limited, and examples thereof include injection molding, extrusion molding, vacuum molding, pressure molding, press molding, transfer molding, cast molding, compression molding, laminate molding, inflation molding, calendar molding, blow molding, hollow molding, two-color molding, foam molding, insert molding, in-mold coating molding, rotational molding, hand lay-up molding, spray-up molding, matched die molding, vacuum injection molding, filament winding molding, centrifugal molding, and pultrusion molding.

[0169] Examples of molded articles include injection molded articles, extrusion molded articles, vacuum molded articles, pressure molded articles, press molded articles, transfer molded articles, cast molded articles, compression molded articles, laminate molded articles, inflation molded articles, calendar molded articles, blow molded articles, hollow molded articles, two-color molded articles, foam molded articles, insert molded articles, in-mold coating molded articles, rotational molded articles, hand layup molded articles, spray-up molded articles, matched die molded articles, vacuum injection molded articles, filament winding molded articles, centrifugal molded articles, pultrusion molded articles, sheets, and films. The molded articles may have a single-layer structure or a multi-layer structure.

[0170] When the heat storage composition is extrusion molded, injection molded, vacuum molded, blow molded, or roll molded, from the viewpoint of molding processability, the melt flow rate (MFR) of the heat storage composition E measured in accordance with JIS K7210 at 230°C under a load of 21 N is preferably 0.1 to 30 g / 10 min.

[0171] The molded article may be a multilayer structure of a heat storage layer containing a heat storage composition and a layer different from the heat storage layer. The layer different from the heat storage layer contains a polymer different from Polymer 1. The polymer different from Polymer 1 is preferably Polymer 2, and more preferably polypropylene (PP), polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), polybutylene terephthalate (PBT), polyamide 6 (PA6), or polyamide 66 (PA66).

[0172] The method for granulating the compact is not particularly limited, and examples thereof include granulation methods using a machine such as a cutter, a cutting machine, a grinder, or a shredder.

[0173] In one aspect, the heat storage composition has excellent heat storage performance, moldability, shape retention, and moisture permeability, and therefore, granular materials made from the heat storage composition of this embodiment can be suitably used, for example, as products or components thereof that directly or indirectly require heat or cold insulation performance.

[0174] Examples of products or components thereof that directly or indirectly require heat / cold insulation performance include building materials, furniture, interior goods, bedding, bathroom materials, vehicles, air conditioning equipment, electrical appliances, heat-insulating containers, clothing, daily necessities, agricultural materials, fermentation systems, thermoelectric conversion systems, and heat transfer media.

[0175] Examples of building materials include flooring, wall materials, wallpaper, ceiling materials, roofing materials, underfloor heating systems, tatami mats, doors, sliding doors, shutters, shoji screens, windows, and window frames.

[0176] The present invention will be described in more detail below with reference to examples and comparative examples, but the present invention is not limited to these examples.

[0177] <Melting Peak Temperature (Tm, Unit: °C), Glass Transition Temperature (Tg, Unit: °C), Melting Enthalpy (ΔHm, Unit: J / g)> Using a differential scanning calorimeter (TA Instruments, DSC Q100), DSC measurements were performed on an aluminum pan containing a sample under a nitrogen atmosphere under the following measurement conditions: (Measurement Condition 1) An aluminum pan containing approximately 10 mg of sample was (1) held at 150°C for 5 minutes, then (2) cooled from 150°C to -80°C at a rate of 5°C / min, then (3) held at -80°C for 10 minutes, and then (4) heated from -80°C to approximately 150°C at a rate of 5°C / min. (Measurement Condition 2) An aluminum pan containing approximately 10 mg of sample is (1) held at 200°C for 5 minutes, then (2) cooled from 200°C to -80°C at a rate of 5°C / min, then (3) held at -80°C for 5 minutes, and then (4) heated from -80°C to approximately 200°C at a rate of 5°C / min.

[0178] The differential scanning calorimetry curve obtained by the calorimetry in step (4) under each measurement condition is taken as the melting curve. The melting curve is analyzed by a method in accordance with JIS K7121-1987 to obtain the melting peak temperature at which the melting endotherm is maximum. The glass transition temperature is obtained by analyzing the melting curve by a method in accordance with JIS K7121-1987. The enthalpy of fusion ΔHm (J / g) is obtained by analyzing the portion of the melting curve within the temperature range of 10 to 60°C by a method in accordance with JIS K7122-1987.

[0179] Synthesis Example 1 An ethylene-methyl acrylate copolymer (corresponding to a precursor polymer) was synthesized by copolymerizing ethylene and methyl acrylate using tert-butyl peroxypivalate as a radical polymerization initiator in an autoclave reactor at a reaction temperature of 195°C and a reaction pressure of 160 MPa. The MFR of the copolymer measured in accordance with JIS K7210 (temperature 190°C, load 21 N) was 34 g / 10 min or less.

[0180] The NMR spectrum of the ethylene-methyl acrylate copolymer was measured under the conditions shown below using a nuclear magnetic resonance spectrometer (AVANCE III 600HDNMR, manufactured by Bruker Biospin Co., Ltd.). The NMR spectrum determined that the ethylene-methyl acrylate copolymer contained 84.1 mol% of structural units derived from ethylene (ethylene units), and 15.9 mol% of structural units derived from methyl acrylate (methyl acrylate units). Measurement probe: 10 mm cryoprobe Measurement solvent: 1,2-dichlorobenzene / 1,1,2,2-tetrachloroethane-d2 = 85 / 15 (volume ratio) mixture Sample concentration: 100 mg / mL Measurement temperature: 135 °C Measurement method: proton decoupling method Number of accumulations: 256 times Pulse width: 45 degrees Pulse repetition time: 4 seconds Measurement standard: tetramethylsilane

[0181] Synthesis Example 2 After the interior of a reactor equipped with a stirrer was purged with nitrogen, 97 parts by mass of 1-octadecanol (purity 95% or higher) and 0.60 parts by mass of tetraisopropyl orthotitanate (manufactured by Nippon Soda Co., Ltd.) were added to 100 parts by mass of ethylene-methyl acrylate, and the mixture was heated and stirred at an internal temperature of 145°C to 150°C for 4 hours at a minimum pressure of 0.1 kPa to synthesize Polymer A-1 (corresponding to Polymer 1), which is an ethylene-n-octadecyl acrylate-methyl acrylate copolymer. Polymer A-1 contained 84.1 mol% of ethylene units, 13.4 mol% of n-octadecyl acrylate units, and 2.5 mol% of methyl acrylate units. Furthermore, when DSC measurement was performed under measurement condition 1, Polymer A-1 had a Tm (°C) of 36°C and a ΔHm of 83 J / g.

[0182] [Preparation of Granules] The following materials were prepared to prepare granules. A twin-screw extruder M1 (screw diameter: 75 mm, effective screw length / screw diameter: 40) and a single-screw extruder M2 (screw diameter = 20 mm) were used as kneading devices. <Polymer 2> D-1: Polypropylene (MFR: 0.5, manufactured by Sumitomo Chemical Co., Ltd.) <Organic Peroxide> E-1: A mixture containing 8% by mass of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane and 92% by mass of polypropylene (1-minute half-life temperature: 180°C) (manufactured by NOF Corporation, CH-12) <Crosslinking Coagent> F-1: A mixture of 50% by mass of trimethylolpropane trimethacrylate and 50% by mass of amorphous silicon dioxide (manufactured by Seiko Chemical Co., Ltd., trade name "Hicross MS50") <Antioxidant> G-1: Pentaerythritol tetrakis[3-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate] (manufactured by SONGWON Co., Ltd., trade name "SONGNOX1010") <Processing Heat Stabilizer> H-1: Tris(2,4-di-tert-butylphenyl)phosphite (manufactured by BASF, trade name "IRGAFOS 168") <Lubricant> I-1: Ethylene bis oleic acid amide (manufactured by NOF Corporation, trade name "Alflo AD-281F") <Surface layer material> J-1: Polypropylene (MFR: 8, manufactured by Sumitomo Chemical Co., Ltd.)

[0183] (Production Example 1) Polymer A-1: ​​82.9 parts by mass, D-1: 10.9 parts by mass, E-1: 4.9 parts by mass, G-1: 0.1 parts by mass, H-1: 0.1 parts by mass, I-1: 0.1 parts by mass was supplied to a twin-screw extruder M1, screw rotation speed 350 rpm, discharge rate 150 kg / hr, melt-kneaded at a maximum barrel temperature of 220 ° C., and a resin composition was prepared. Also, J-1 was supplied to a single-screw extruder M2, screw rotation speed 74.0 Hz, discharge rate 8 kg / hr, and melt-kneaded at a maximum barrel temperature of 280 ° C., and a sheet-like J-1 was prepared. Next, using a multilayer sheet molding machine equipped with a multilayer die, the resin composition and J-1 were multilayer extruded at a die temperature of 230 ° C. so that the outer layer / inner layer / outer layer was J-1 / resin composition / J-1, and the mass ratio of the outer layer / inner layer / outer layer was 4.0 / 150 / 4.0, to obtain a molded body of heat storage composition 1. By cutting the molded body, 7 mm square pellets of heat storage composition 1 (granular body containing polymer 1) were produced. After melt-kneading and homogenizing the pellets, DSC measurement was performed under measurement condition 2, and the Tm was 35 ° C. and ΔHm was 68 J / g.

[0184] [Packaging Container] The bags shown in Table 1 were prepared as packaging containers for the pellets, and 50 mm x 130 mm test pieces were made from each bag. The air permeability of the test pieces was measured using an air permeability evaluation device according to the following procedure: Type B Gurley Densometer (Toyo Seiki Co., Ltd.) Circular hole = 645.16 mm Elastic gasket = thin, flat (Durometer hardness 50-60) Outer cylinder: inner diameter = 82.5 mm, height = 254 mm Inner cylinder: inner diameter = 74.0 mm, outer diameter = 76.2 mm, height = 254 mm Total volume = 350 mL

[0185] The cylinder of the B-type Gurley densometer was lifted and 50 mL of air was sucked in, after which the test piece was set and measurement was started. The air permeability rate [sec / 100 mL] was calculated by doubling the time it took for 50 mL of air to pass through. If 5 mL of air did not pass through within 300 seconds, it was determined that the material had no air permeability.

[0186]

[0187] [Production of Articles] (Example 1) K-1 was cut into a 40 cm x 40 cm piece, and the edges were heat-sealed to produce a bag. 6,600 g of pellets of heat storage composition 1 were placed in the bag, and the bag was sealed with adhesive cloth tape to produce an article.

[0188] Examples 2 to 7 Articles were produced in the same manner as in Example 1, except that the amount of pellets of the heat storage composition 1 was changed.

[0189] (Example 8) K-2 was cut into a 40 cm x 40 cm piece, and the edges were heat-sealed to form a bag. An article was produced in the same manner as in Example 1, except that 720 g of pellets of heat storage composition 1 were placed in the produced bag.

[0190] Comparative Example 1 An article was produced in the same manner as in Example 1, except that 720 g of polystyrene pellets (manufactured by Toyo Styrene Co., Ltd., trade name "G200C", Tg: 100° C.) were placed in K-1.

[0191] The basis weight and filling rate of the produced articles are shown in Table 2. The filling rate of the pellets was calculated by setting the maximum amount of pellets that can be packed into a packaging container as a filling rate of 100%.

[0192]

[0193] [Evaluation of the Articles] (Examples 4 to 8, Comparative Example 1) The obtained articles were placed on the ceiling of a box model, and the temperature and absorbed heat quantity at each measurement point were measured by the following measurement method. The results are shown in Table 3.

[0194] (Reference Example 1) The temperature and absorbed heat quantity were measured at each measurement point without installing anything on the ceiling of the box model.

[0195] <Production of Box Model> A box model was produced using the following materials: Figure 1 is a schematic diagram of the inside of the produced box model. (Square timber: all 35mm square) Length ・Square timber-1: 600mm 4 pieces ・Square timber-2: 530mm 8 pieces ・Square timber-3: 360cm 2 pieces ・Square timber-4: 600cm 12 pieces ・Square timber-5: 80cm 16 pieces ・Square timber-6: 670cm 8 pieces ・Square timber-7: 670cm 4 pieces ・Square timber-8: 300cm 4 pieces (Plywood: all 10mm thick) Width x Length ・Plywood-1: 910x910mm 1 piece ・Plywood-2: 600x600mm 1 piece ・Plywood-3: 600x600mm 1 piece ・Plywood-4: 910x910mm 1 piece (Insulation material): Styrofoam IB [manufactured by DuPont]) Width x Length x Thickness・Insulation material-1: 530 x 530 x 30 mm 1 sheet ・Insulation material-2: 600 x 700 x 30 mm 4 sheets ・Insulation material-3: 600 x 700 x 20 mm 4 sheets ・Insulation material-4: 90 x 600 x 30 mm 12 sheets ・Insulation material-5: 150 x 150 x 25 mm 16 sheets ・Insulation material-6: 80 x 530 x 30 mm 8 sheets ・Insulation material-7: 530 x 530 x 30 mm 1 sheet ・Insulation material-8: 100 x 400 x 30 mm 2 sheets ・Insulation material-9: 100 x 600 x 30 mm 2 sheets (Wire mesh: 10 mm grid) Width x Length ・600 x 600 mm 1 sheet (Heater: Hori Kotatsu Heater YMD-605R, Yamazen Co., Ltd.) Width x Length x Height・290 x 360 x 85 mm 1 unit (Plastic wood wrench: PM4A, manufactured by Fukubi Chemical Industry Co., Ltd.) ・16 pieces

[0196] A 600 mm cubic frame 10 was assembled using timber-1 (1A) and timber-2 (1B), and then insulation material-1 (3A), plywood-2 (2B), timber-3 (1C), and a heater 20 were installed at the bottom of the cubic frame 10. Next, timber-4 (1D), timber-5 (1E), and insulation material-6 (3F) were assembled and installed at the four corners of the cubic frame 10, and insulation material-2 (3B) and insulation material-3 (3C) were installed around the periphery of the cubic frame 10. Three sheets of insulation material-4 (3D) and four sheets of insulation material-5 (3E) were stacked on top of each other and assembled, and installed at the four corners of the cubic frame 10. Timber-6 (1F) was nailed to timber-4 (1D), and insulation material-3 (3C) was pressed against it using a plastic wrench to secure it in place. The lower part of the cubic frame 10 was assembled using timber-7 (1G), timber-8 (1H), heat insulating material-7 (3G), and plywood-1 (2A), and a 30 mm diameter hole was drilled for the cord outlet. Plywood-3 (2C), heat insulating material-8 (3H), heat insulating material-9 (3I), plywood-4 (2D), and wire mesh 4 were placed on the upper part of the cubic frame 10.

[0197] <Measurement of thermal properties> Two thermocouples (T thermocouple temperature sensor, ESCO Corporation) and two heat flow meters (heat sensor HF-30s, Eiko Seiki Co., Ltd.) were prepared. As shown in Figure 1, a thermocouple 21A was installed inside the box as a measurement point for the temperature inside the box, a thermocouple 21B was installed on the underside of plywood-4 (2D) as a measurement point for the space temperature, a heat flow meter 22A was installed on the upper surface of plywood-3 (2C), and a heat flow meter 22B was installed on the underside of plywood-4 (2D).

[0198] The thermal properties were measured using the following procedure. (1) The item was placed on the wire mesh 4 in Figure 1, and the insulation material-2 (3B), insulation material-3 (3C) on the wall of the box, and the plywood-4 (2D) on the top were opened. (2) The temperature in the laboratory was set to 24°C, and the temperature inside the box and the item was kept constant. (3) After closing the box with insulation material-2 (3B), insulation material-3 (3C), and plywood-4 (2D), the entire box was covered with a blue tarp (width x length 3400 x 3400 mm). (4) The heater was turned to the lowest output and turned on to start heating. After heating for four hours, the power was turned off. The data after two hours of heating was used to perform the following evaluations.

[0199] The space temperature T of Reference Example 1 when no object was placed on the wire mesh 30 １ and the space temperature T when each item is placed on the wire mesh 30. ２ The temperature rise suppression temperature ΔT [°C] was calculated from the difference between the heat flow meter-1 and the thermocouple-2. ２ ] is integrated over time, the difference between the heat absorption amount [kJ / m ２ ] was calculated.

[0200]

[0201] 1A... timber-1, 1B... timber-2, 1C... timber-3, 1D... timber-4, 1E... timber-5, 1F... timber-6, 1G... timber-7, 1H... timber-8, 2A... plywood-1, 2B... plywood-2, 2C... plywood-3, 2D... plywood-4, 3A... insulation-1, 3B... insulation-2, 3C... insulation-3, 3D... insulation-4, 3E... insulation-5, 3F... insulation-6, 3G... insulation-7, 3H... insulation-8, 3I... insulation-9, 4... wire mesh, 10... cubic frame, 20... heater, 21A... thermocouple, 21B... thermocouple, 22A... calorimeter, 22B... calorimeter.

Claims

1. A packaging container and a coating material having a density of 0.1 g / cm ２ and a granular material filled at a basis weight of 30 J / g or more, the granular material containing a polymer having a melting enthalpy of 30 J / g or more as observed in a temperature range of 10°C or more and 60°C or less by differential scanning calorimetry.

2. The article according to claim 1, wherein the polymer has a structural unit represented by the following formula (1): [(In formula (1), R １ represents a hydrogen atom or a methyl group; L １１ represents a single bond, —CO—O—, —O—CO—, or —O—; L １２ is a single bond, -CH ２ --, --CH ２ -CH ２ --, --CH ２ -CH ２ -CH ２ --, --CH ２ -CH(OH)-CH ２ - or -CH ２ -CH(CH ２ OH)—, L １３ is a single bond, -CO-O-, -O-CO-, -O-, -CO-NH-, -NH-CO-, -CO-NH-CO-, -NH-CO-NH-, -NH-, or -N(CH ３ )-, L １６ represents an alkyl group having 14 to 30 carbon atoms.

3. The article of claim 2, wherein said polymer has constitutional units derived from ethylene.

4. The article according to claim 1, wherein the long side of the granular material is 0.1 mm or more and 50 mm or less.

5. The article of claim 1, wherein the loading of said granular material is less than 20 kg.

6. The article of claim 1, wherein the packaging container is air permeable.

7. The article according to any one of claims 1 to 6, wherein the granules further contain a low molecular weight compound having a molecular weight of 2000 or less, and the content of the low molecular weight compound is 3 parts by mass or more and 1000 parts by mass or less per 100 parts by mass of the polymer.

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