Article having heat storage performance

Abstract

To provide an article that can exhibit heat storage performance more readily to solve such the problem with a laminate including a heat insulation layer and a heat storage layer that a step of producing a heat insulation material becomes multiple steps and the shape of the heat insulation material is restricted.SOLUTION: An article having heat storage performance according to the present invention comprises: a packaging container; and a granular material that is filled at basis weight of at least 0.1 g / cm2 in the packaging container, where the granular material contains a polymer having a melting enthalpy of at least 30 J / g, as observed in the temperature range of 10-60°C by differential scanning calorimetry.SELECTED DRAWING: Figure 1

Description

Technical Field

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

Background Art

[0002] Many conventional heat insulating materials are made of polystyrene foam or polyurethane foam. Patent Document 1 describes a foamed polystyrene heat insulating material that can be easily fitted into floor joists, columns, etc. and a method for producing the same. Heat insulating materials used for building materials such as walls, floors, and ceilings, and heat insulating containers are required to have high heat insulating performance. In Patent Document 2, in order to improve the heat insulating performance of the heat insulating material, a laminate having a heat insulating layer made of polystyrene foam and a heat storage layer containing a polymer having a specific structure is considered to be used as the heat insulating material.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the case of a laminate having a heat insulating layer and a heat storage layer, the process of manufacturing the heat insulating material becomes multi-step, and the shape of the heat insulating material is restricted. Therefore, one aspect of the present invention aims to provide an article that can more easily exhibit heat storage performance.

Means for Solving the Problems

[0005] In some aspects of the present invention, the following [1] to [7] are provided. [1] A packaging container, and 0.1 g / cm in the packaging container 2An article comprising granular materials filled with the above basis weight, wherein the granular materials contain a polymer having a melting enthalpy of 30 J / g or more observed in a temperature range of 10°C or more and 60°C or less by differential scanning calorimetry, and the article has heat storage performance. [2] The article according to [1] above, wherein the polymer is a polymer having a structural unit represented by the following formula (1).

Chemical formula

Advantages of the Invention

[0006] According to the present invention, an article capable of more simply exhibiting heat storage performance can be provided.

Brief Description of the Drawings

[0007]

Figure 1

Modes for Carrying Out the Invention

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

[0009] In this specification, the term "step" includes not only an independent step but also a step that cannot be clearly distinguished from other steps as long as the intended action of the step is achieved. In this specification, a numerical range indicated by using "~" indicates a range including the numerical values described before and after "~" as the minimum value and the maximum value, respectively. In the numerical ranges described step by step in this specification, the upper limit value or the lower limit value of the numerical range of a certain step may be replaced with the upper limit value or the lower limit value of the numerical range of other steps. Also, in the numerical ranges described in this specification, the upper limit value or the lower limit value of the numerical range may be replaced with the value shown in the examples.

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

[0011] (Packaging Container) The packaging container is not particularly limited as long as it can be filled with granular materials. Examples of the packaging container include bags, cross bags, non-woven fabrics, pouches, nets, foams, bottles, boxes, and cages.

[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.), polyurethanes, metal materials such as aluminum, ceramics, silicone rubber, paper, cotton, hemp, wood, and bamboo.

[0013] From the viewpoints of preventing condensation and workability, the packaging container may have air permeability. Examples of the packaging container having air permeability include containers made of resins or papers with high air permeability, containers made of non-woven fabrics, and containers with holes.

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

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

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

[0017] The basis weight of the granular material filled in the packaging container is 0.1 g / cm2 as above, and 0.1 to 20 g / cm 2 、0.1 to 10 g / cm 2 、or 0.1 to 5 g / cm 2 may also be acceptable.

[0018] The shape of the granular material may be spherical, angular (cubic), bead-like, or columnar (pellet-like). The granular material 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 granular material according to this embodiment can be produced using a heat storage composition containing Polymer 1. The granular material may be produced, for example, by cutting a molded body of the heat storage composition described below into a predetermined size. Hereinafter, the components that the granular material and the heat storage composition may contain will be described in detail.

[0020] <Polymer 1> The ΔHm observed within the temperature range of 10°C or more and 60°C or less of Polymer 1 is preferably 50 J / g or more, more preferably 60 J / g or more, and even more preferably 70 J / g or more. The upper limit value of the above ΔHm is usually 200 J / g or less. ΔHm is measured according to the method described in the examples.

[0021] For example, by adjusting the number of the following structural unit B in Polymer 1 and the number of carbon atoms of L in the formula (1) of structural unit B 6 ΔHm can be within the above range. As a result, the heat storage performance and the like of the heat storage composition can be adjusted.

[0022] Preferably, Polymer 1 (one kind of Polymer 1 or a mixture of a plurality of Polymer 1) has a melting peak temperature Tm within the range of 10 to 60°C, and Tm is more preferably within the range of 10 to 50°C, and even more preferably within the range of 10 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 is 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 endothermic heat of melting is defined as the melting peak temperature.

[0024] For example, by adjusting the number of the following-described structural unit B in Polymer 1 and the number of carbon atoms of L in Formula (1) of structural unit B 6 the melting peak temperature of Polymer 1 can be adjusted. As a result, the heat storage performance and the like of the heat storage composition containing Polymer 1 can be adjusted.

[0025] As the granular material filled in the packaging container, granular materials of Polymer 1 having different melting peak temperatures may be mixed.

[0026] Polymer 1 has a molecular weight exceeding 2,000. 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 from 10,000 to 1,000,000, more preferably from 50,000 to 750,000, and still more preferably from 100,000 to 500,000. In the measurement of 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] The polymer 1 may be branched and may have a long-chain alkyl group or a long-chain ether group which may be substituted with a functional group in the side chain. The polymer is not particularly limited. For example, a polymer mainly composed of (meth)acrylate having a long-chain alkyl group or a long-chain ether group which may be branched and may be substituted with a functional group in the side chain, a polymer mainly composed of a vinyl ester main chain having a long-chain alkyl group or a long-chain ether group which may be branched and may be substituted with a functional group in the side chain, a polymer mainly composed of a vinyl ether main chain having a long-chain alkyl group or a long-chain ether group which may be branched and may be substituted with a functional group in the side chain, a polymer mainly composed of a polyolefin main chain having a long-chain alkyl group or a long-chain ether group which may be branched and may be substituted with a functional group in the side chain, etc. may be mentioned. As the side chain, a long-chain alkyl group which may be branched and may be substituted with a functional group is preferable, and a polymer mainly composed of (meth)acrylate or a polyolefin main chain is preferable. As the polymer 1, for example, the polymers described in JP-A-2015-091903, WO 2016 / 098674, WO 2017 / 217419, WO 2022 / 244848, etc. may be mentioned.

[0028] As one aspect of the polymer 1, a polymer having a structural unit containing an alkyl group having 14 or more and 30 or less carbon atoms (C 14~30 ) may be mentioned. The polymer 1 preferably has a structural unit represented by the following formula (1) (which may also be referred to as structural unit B).

Chemical formula

[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 represents a single bond, -CH2-, -CH2-CH2-, -CH2-CH2-CH2-, -CH2-CH(OH)-CH2-, or -CH2-CH(CH2OH)-, L 13represents a single bond, -CO-O-, -O-CO-, -O-, -CO-NH-, -NH-CO-, -CO-NH-CO-, -NH-CO-NH-, -NH-, or -N(CH3)-, and L 16 represents an alkyl group of C 14~30 . Note that L 11 , L 12 , and L 13 For 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. L 11 is preferably -CO-O-, -O-CO-, or -O-, more preferably -CO-O- or -O-CO-, and even more preferably -CO-O-. L 12 is preferably a single bond, -CH2-, -CH2-CH2-, or -CH2-CH2-CH2-, and more preferably a single bond. L 13 is preferably a single bond, -O-CO-, -O-, -NH-, or -N(CH3)-, and more preferably a single bond.

[0031] L in formula (1) 16 is an alkyl group of C 14~30 such that the molding processability of the composition containing polymer 1 is good. C 14~30 Examples of the alkyl group of C 14~30 include a linear alkyl group of C 14~30 and a branched alkyl group of C 6 is preferably a linear alkyl group of C 14~30 , more preferably a linear alkyl group of C 14~24 , and even more preferably a linear alkyl group of C 16~22 .

[0032] C 14~30Examples of the linear 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 of is preferably as follows.

Chemical formula

Chemical formula

Chemical formula

[0035] R in formula (1) 1 、L 11 、L 12 、L 13 As the combination of, R 1 is a hydrogen atom, and L 11 、L 12 、and L 13 are single bonds, and L 16 is C 14~30a combination that is an alkyl group, 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 that is an alkyl group is also preferred. .

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

Chemical formula

[0037] R in formula (1) 1 , L 11 , L 12 , and L 13 The combination of is even more preferably the following.

Chemical formula

[0038] The constituent unit B is preferably derived from 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, n-eicosyl acrylate, n-henicosyl 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-hexadecyl methacrylate, n-heptadecyl methacrylate, n-octadecyl methacrylate, n-nonadecyl methacrylate, n-eicosyl methacrylate, n-henicosyl 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-vinyl tetradecylate, n-vinyl hexadecylate, n-vinyl octadecylate, n-vinyl eicosylate, n-vinyl docosylate, n-tetradecyl vinyl ether, n-hexadecyl vinyl ether, n-octadecyl vinyl ether, n-eicosyl vinyl ether, or n-docosyl vinyl ether.

[0039] The polymer 1 may have two or more kinds of constituent units B. For example, it may be a polymer having a constituent unit derived from n-hexadecyl acrylate and a constituent unit derived from n-octadecyl acrylate.

[0040] The polymer 1 is preferably a polymer having a structural unit derived from ethylene (which may also be referred to as structural unit A) such that the moldability of the heat storage composition and the shape retention of the granular material are good at a temperature equal to or higher than the melting peak temperature of the polymer 1. The structural unit A is a structural unit obtained by polymerizing ethylene, and the 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 the formula (1) and a structural unit A derived from ethylene.

[0042] The polymer 1 may have at least one structural unit (which may also be referred to as structural unit C) selected from the group consisting of the structural unit represented by the following formula (2) and the structural unit represented by the following formula (3).

Chemical formula

Chemical formula

[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 represents a single bond, or an alkylene group of C 1~8 and L 25 represents a hydrogen atom, an epoxy group, -CH(OH)-CH2OH, a carboxy group, a hydroxy group, an amino group, or an alkylamino group of C 1~4 . Note that each of the horizontally written chemical formulas in the description of the chemical structure of L 1 corresponds to the upper side (main chain side of the polymer) of formula (2) on the left side and the lower side (terminal side of the side chain of the polymer) of formula (2) on the right side.

[0044] In formula (2), R 2 is preferably a hydrogen atom. In formula (2), L 21is 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 as C 1~8 Examples of the alkylene group of C 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-heptylene group, an n-octylene group, and a 2-ethyl-n-hexylene group. In formula (2), L 24 is preferably a methylene group, an ethylene group, and an n-propylene group, and more preferably a methylene group.

[0046] In formula (2), L 25 as C 1~4 Examples of the alkylamino group of C include a methylamino group, an ethylamino group, a propylamino group, a butylamino group, a dimethylamino group, and a diethylamino group. In formula (2), L 25 is preferably a hydrogen atom, an epoxy group, or CH(OH)-CH2OH, and more preferably a hydrogen atom.

[0047] R in formula (2) 2 , L 21 , L 24 , L 25 The combination of is preferably the following.

Chemical formula

Chemical formula

Chemical formula

[0048] R in formula (2)2 , L 21 , L 24 , L 25 The combination of, L is more preferably as follows. [Chemical formula]

[0049] R in formula (2) 2 , L 21 , L 24 , L 25 The combination of, L is even more preferably as follows. [Chemical formula]

[0050] The structural unit represented by formula (2) is derived from, for example, 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, tert-butyl methacrylate, 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 the polymer 1 contains the structural unit C and the structural unit C is represented by the formula (3), the structural unit may be derived from maleic anhydride. Further, the structural unit C may be formed by a condensation reaction of two structural units that can be repeatedly selected from the structural unit B and the structural unit C represented by the formula (2).

[0052] The polymer 1 may have two or more kinds of structural units C. For example, it may be 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] The polymer 1 is preferably a polymer having the structural unit B represented by the formula (1). Examples of the polymer having the structural unit B represented by the formula (1) include a polymer composed of the structural unit B, a polymer having the structural unit B and the structural unit A, the polymer 1 having the structural unit B and the structural unit C, and a polymer having the structural unit B, the structural unit A, and the structural unit C.

[0054] Examples of the "polymer composed of the structural unit B" include those in which R 1 is a hydrogen atom or a methyl group, L 11 , L 12 , and L 13 are single bonds, L 16 is an alkyl group of C 14~30 and the polymer composed of the structural unit B represented by the formula (1), and those in which R 1 is a hydrogen atom or a methyl group, L 11 is -CO-O-, L 12 and L 13 are single bonds, L 16 is an alkyl group of C 14~30 and the polymer composed of the structural unit B represented by the formula (1).

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

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

[0057] From the viewpoint of increasing ΔHm, for Polymer 1, a polymer in which the number of the structural unit B is 50 to 80% with respect to 100% of the total number of the structural unit B and the structural unit A contained in the polymer is preferable. From the viewpoint of moldability, for Polymer 1, a polymer in which the number of the structural unit B is 10 to 50% with respect to 100% of the total number of the structural unit B and the structural unit A contained in the polymer is preferable.

[0058] Examples of "Polymer 1 having the structural unit B and the structural unit 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 The structural unit B represented by the formula (1) which is an alkyl group of, and R 2 is a hydrogen atom or a methyl group, and L 21 is -CO-O-, and L24 is a methylene group, and L 25 Examples thereof include a polymer having a structural unit C represented by the formula (2) in which is a hydrogen atom. In this case, the number of the structural unit B is preferably 80% or more with respect to 100% of the total number of the structural unit B and the structural unit C contained in the polymer.

[0059] In one aspect of Polymer 1, the number of the structural unit A is usually 0 to 99% with respect to 100% of the total number of the structural unit A, the structural unit B, and the structural unit C, and the total number of the structural unit B and the structural unit C is usually 1 to 100%. With respect to 100% of the total number of the structural unit B and the structural unit C, the number of the structural unit B is usually 1 to 100%, and the number of the structural unit C is usually 0 to 99%.

[0060] In one aspect, the number of the structural unit A in Polymer 1 is 1 to 99% with respect to 100% of the total number of the structural unit A, the structural unit B, and the structural unit C, and is preferably 70 to 99%, more preferably 80 to 97.5%, and still more preferably 85 to 92.5% so that the molded article containing the heat storage composition of the present invention has good shape retention. The total number of the structural unit B and the structural unit C in Polymer 1 is preferably 1 to 30%, more preferably 2.5 to 20%, and still more preferably 7.5 to 15% so that the molded article containing the heat storage composition of the present invention has good shape retention, with respect to 100% of the total number of the structural unit A, the structural unit B, and the structural unit C.

[0061] In one aspect, the number of the structural unit B in Polymer 1 is usually 1 to 100% with respect to 100% of the total number of the structural unit B and the structural unit C, and is preferably 60 to 100%, more preferably 80 to 100% so that the heat storage performance of the composition containing the Polymer 1 is good.

[0062] In one aspect, the number of the structural unit C in Polymer 1 is usually 0 to 99% with respect to 100% of the total number of the structural unit B and the structural unit C, and is preferably 0 to 40%, more preferably 0 to 20% so that the heat storage performance of the composition containing the Polymer 1 is good.

[0063] The number of structural unit A, the number of structural unit B, and the number of structural unit C are measured by a well-known method 13 from the integral value of the signal attributed to each structural unit in the C nuclear magnetic resonance spectrum ( 13 C-NMR spectrum) or 1 the H nuclear magnetic resonance spectrum ( 1 H-NMR spectrum).

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

[0065] <The number of structural unit A1 derived from ethylene and structural unit C1 derived from methyl acrylate when the precursor polymer P is an ethylene-methyl acrylate copolymer> (unit: %) When the precursor polymer P contains a structural unit A derived from ethylene, first, the number of structural unit A1 and structural unit C1 contained in the precursor polymer P is determined. 13 When determined from the C-NMR spectrum, for example, the integral values in the ranges of a1, b1, c1, d1, and e1 below are determined, the number of dyads (AA, AC, CC) of structural unit A and structural unit C is determined from the following formula, and the number of structural unit A and structural unit C is determined by substituting 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. a1: 29.0 - 31.0 ppm b1: 32.5 - 33.2 ppm c1: 42.0 - 42.3 ppm d1: 43.5 - 44.5 ppm e1: 45.5 - 46.5 ppm AA = a1 / 4 + b1 / 2 AC = e1 CC = c1 + d1

[0066] <Conversion rate X of the structural unit C1 derived from methyl acrylate to the structural unit B represented by the formula (1) B >(unit: %) Since the structural unit B in the polymer 1 is formed by the reaction of the structural unit C contained in the precursor polymer P and the compound α described later, the conversion rate X at which the structural unit C1 is converted to the structural unit B by the above reaction B is determined by the following method.

[0067] The integral value of the signal (range f1) attributed to a specific carbon contained in the side chain of the structural unit C of the precursor polymer P and the integral value of the signal (range g1) attributed to a specific carbon contained in the side chain of the structural unit B of the polymer 1 (are substituted into the following formula to obtain the conversion rate. f1: 50.5 - 51.2 ppm g1: 63.9 - 64.8 ppm Conversion rate (X B ) = 100 × g1 / (f1 + g1)

[0068] <Number of the structural unit A derived from ethylene, the structural unit B represented by the formula (1), and the structural unit C derived from methyl acrylate contained in the polymer 1> (unit: %) In the reaction of the precursor polymer P and the compound α described later, since the structural unit A contained in the precursor polymer P does not change, the number of the structural unit A contained in the polymer 1 is the same as the number of the structural unit A1 contained in the precursor polymer P (number of the structural unit A = number of the structural unit A1). The number of the structural unit B contained in the polymer 1 is obtained as the product of the number of the structural unit C1 contained in the precursor polymer P and the conversion rate X B (number of the structural unit B = number of the structural unit C1 × conversion rate X B / 100). The number of the structural unit C contained in the polymer 1 is obtained as the difference between the number of the structural unit C1 contained in the precursor polymer P and the number of the structural unit B contained in the polymer 1 (number of the structural unit C = number of the structural unit C1 - number of the structural unit B).

[0069] The contents (mass %) of the structural unit A, the structural unit B, and the structural unit C contained in the polymer 1 can be calculated from the following formulas, respectively. Mass percentage of structural unit A = (Number of structural units A × Molecular weight of structural unit A) / (Number of structural units A × Molecular weight of structural unit A + Number of structural units B × Molecular weight of structural unit B + Number of structural units C × Molecular weight of structural unit C) Mass percentage of structural unit B = (Number of structural units B × Molecular weight of structural unit B) / (Number of structural units A × Molecular weight of structural unit A + Number of structural units B × Molecular weight of structural unit B + Number of structural units C × Molecular weight of structural unit C) Mass percentage of structural unit C = (Number of structural units C × Molecular weight of structural unit C) / (Number of structural units A × Molecular weight of structural unit A + Number of structural units B × Molecular weight of structural unit B + Number of structural units C × 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 the structural unit represented by the above formula (2) and the structural unit represented by the above formula (3) (however, in formula (2), L 21 is -CO-O-, -O-CO-, or -O-).

[0071] A compound (sometimes referred to as compound α) for forming structural unit B by reacting with structural unit C in precursor polymer P is an alcohol having an alkyl group of C 14~30 , an amine having an alkyl group of C 14~30 , an alkyl halide having an alkyl group of C 14~30 , a carboxylic acid having an alkyl group of C 14~30 , a carboxylic acid amide having an alkyl group of C 14~30 , a carboxylic acid halide having an alkyl group of C 14~30 , a carbamic acid having an alkyl group of C 14~30 , an alkyl urea having an alkyl group of C 14~30 , and at least one compound selected from the group consisting of isocyanates having an alkyl group of C 14~30 .

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

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

[0074] The precursor polymer P is preferably a polymer in which the number of the structural unit A is 0 to 99% and the total number of the structural unit C is 1 to 100% with respect to 100% of the total number of the structural unit A and the structural unit C, and more preferably, the number of the structural unit A is 70 to 99% and the total number of the structural unit C is 1 to 30%.

[0075] Examples of the method for forming the structural unit B in the polymer 1 include a method of reacting the structural unit C contained in the precursor polymer P with the compound α, and a method of polymerizing the monomer that is the raw material of the structural unit B or a method of copolymerizing ethylene and the monomer that is the raw material of 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. Examples of the azo compound include 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-butyrate) 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-ethyl acrylate copolymers, ethylene-n-propyl acrylate copolymers, ethylene-n-butyl acrylate copolymers, ethylene-methyl methacrylate copolymers, ethylene-ethyl methacrylate copolymers, ethylene-n-propyl methacrylate copolymers, ethylene-n-butyl methacrylate copolymers, ethylene-vinyl formate copolymers, ethylene-vinyl acetate copolymers, ethylene-vinyl propionate copolymers, ethylene-vinyl (n-butyrate) copolymers, ethylene-methyl vinyl ether copolymers, ethylene-ethyl vinyl ether copolymers, ethylene-n-propyl vinyl ether copolymers, ethylene-n-butyl vinyl ether copolymers, ethylene-maleic anhydride copolymers, ethylene-glycidyl acrylate copolymers, ethylene-glycidyl methacrylate copolymers, ethylene-3-(dimethylamino)propyl acrylate copolymers, and ethylene-3-(dimethylamino)propyl methacrylate copolymers.

[0077] C 14~30Examples of the alcohol having a linear 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 the alcohol 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 the amine 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 the amine 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 the alkyl halide having a linear 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 the alkyl halide 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 the carboxylic acid 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-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.

[0084] C 14~30 Examples of the carboxylic acid having a branched alkyl group include isotetradecanoic acid, isopentadecanoic acid, isohexadecanoic acid, isoheptadecanoic acid, isooctadecanoic acid, isononadecanoic acid, isoeicosanoic acid, isohenicosanoic 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 the carboxamide having a linear alkyl group include n-tetradecanamide, n-pentadecanamide, n-hexadecanamide, n-heptadecanamide, n-octadecanamide, n-nonadecanamide, n-eicosanamide, n-henicosanamide, n-docosanamide, n-tricosanamide, n-tetracosanamide, n-pentacosanamide, n-hexacosanamide, n-heptacosanamide, n-octacosanamide, n-nonacosanamide, and n-triacontanamide.

[0086] C 14~30Examples of carboxylic acid amides having a branched alkyl group include isomyristic 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 isomyristic 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 the carbamic acid having a linear 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-henicosylcarbamic 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 the carbamic acid having a branched alkyl group include isotetradecylcarbamic acid, isopentadecylcarbamic acid, isohexadecylcarbamic acid, isoheptadecylcarbamic acid, isooctadecylcarbamic acid, isononadecylcarbamic acid, isoeicosylcarbamic acid, isohenicosylcarbamic 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 the alkylurea having a linear alkyl group include n-tetradecylurea, n-pentadecylurea, n-hexadecylurea, n-heptadecylurea, n-octadecylurea, n-nonadecylurea, n-eicosylurea, n-henicosylurea, n-docosylurea, n-tricosylurea, n-tetracosylurea, n-pentacosylurea, n-hexacosylurea, n-heptacosylurea, n-octacosylurea, n-nonacosylurea, and n-triacontylurea.

[0092] C 14~30Examples of the alkylurea having a branched alkyl group include isotetradecylurea, isopentadecylurea, isohexadecylurea, isoheptadecylurea, isooctadecylurea, isononadecylurea, isoeicosylurea, isoheneicosylurea, isodocosylurea, isotricosylurea, isotetracosylurea, isopentacosylurea, isohexacosylurea, isoheptacosylurea, isooctacosylurea, isononacosylurea, and isotriacontylurea.

[0093] C 14~30 Examples of the isocyanate 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 the isocyanate 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 at a temperature of 190 °C and a load of 21 N in accordance with JIS K7210 is preferably 0.1 to 500 g / 10 min or less, more preferably 1 to 100 g / 10 min, and even more preferably 5 to 50 g / 10 min or less.

[0096] Examples of the method for producing the precursor polymer P include coordination polymerization method, cationic polymerization method, anionic polymerization method, and radical polymerization method. Preferably, it is the radical polymerization method, and more preferably the radical polymerization method under high pressure.

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

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

[0099] When reacting the precursor polymer P with the compound α, a catalyst may be added to accelerate 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 addition amount of the catalyst is preferably 0.01 to 50 parts by mass, more preferably 0.01 to 5 parts by mass, based on 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 accelerate the reaction. The content of the 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 aspect, Polymer 1 is a non-crosslinked polymer (hereinafter sometimes 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 constitutional unit A, constitutional unit B, and constitutional unit C is preferably 90% or more, more preferably 95% or more, and still more preferably 100% based on 100% of the total number of all constitutional units contained in the polymer.

[0103] In one aspect, polymer 1 and / or polymer 2 described below is crosslinked. That is, at least a part of the molecules of polymer 1 and polymer 2 are linked intermolecularly by covalent bonds. Note that "polymer 1 is crosslinked" means that polymer 1 molecules are linked intermolecularly by covalent bonds, and / or polymer 1 is linked intermolecularly by covalent bonds to a polymer different from polymer 1 (which may be polymer 2 or a polymer other than polymers 1 and 2).

[0104] Examples of methods for crosslinking polymers include methods of crosslinking by irradiating with ionizing radiation and methods of crosslinking using organic peroxides.

[0105] When irradiating a polymer with ionizing radiation to effect crosslinking, usually, ionizing radiation is irradiated to polymer α previously formed into a desired shape. For forming, known methods are used, and extrusion molding, injection molding, and press molding are preferred. The molded article irradiated with ionizing radiation may be a molded article containing only polymer 1 as a polymer component, or may be a molded article of a composition containing, in addition to polymer 1, a polymer different therefrom. In the latter case, examples of the polymer different from polymer 1 include polymer 2 described below. When the molded article contains polymer 1 and polymer 2, based on the total amount of polymer 1 and polymer 2, the content of polymer 1 is preferably 1 to 99% by mass.

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

[0107] Irradiation with ionizing radiation is performed using an ionizing radiation irradiation device, and the irradiation dose is usually 5 to 300 kGy, preferably 10 to 150 kGy. Polymer 1 can obtain a polymer with a high degree of crosslinking at a lower irradiation dose compared to normal cases.

[0108] When obtaining the crosslinked polymer 1 crosslinked by irradiation with ionizing radiation, a molded article irradiated with ionizing radiation contains a crosslinking aid, whereby a crosslinked polymer 1 with a higher degree of crosslinking can be obtained. The crosslinking aid is for increasing the degree of crosslinking of the polymer 1 and improving the mechanical properties, and a compound having a plurality of double bonds in the molecule is preferably used.

[0109] Examples of the crosslinking aid include N,N'-m-phenylenebismaleimide, 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 of a plurality.

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

[0111] Examples of the method of crosslinking using an organic peroxide include a method of crosslinking polymer α by a known molding method involving heating a composition containing polymer α, polymer 2, and an organic peroxide. Examples of the known molding method involving heating include extrusion molding, injection molding, and press molding.

[0112] When crosslinking with an organic peroxide, an organic peroxide having a decomposition temperature equal to or higher than the flow start temperature of the resin component contained in the heat storage composition is preferably used. Examples of the organic peroxide 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 the granular material according to the present embodiment may contain Polymer 2, which is a polymer different from Polymer 1. In one aspect, the melting peak temperature or the glass transition temperature of Polymer 2 is 50 to 180 °C, preferably 60 to 170 °C.

[0114] Examples of 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), low-density polyethylene by high-pressure method (LDPE), ethylene-α-olefin copolymer, ethylene-vinyl acetate copolymer (EVA), and polypropylene (PP).

[0115] Examples of 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 a structural unit derived from ethylene and a structural unit derived from 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 high-density polyethylene, low-density polyethylene by high-pressure method, and ethylene-α-olefin copolymer as Polymer 2 is 860 kg / m 3 or more and 960 kg / m 3 or less.

[0118] Examples of polypropylene as Polymer 2 include a propylene homopolymer, a propylene random copolymer as described below, and a propylene polymerization material as described below. The content of the structural unit derived from propylene in polypropylene exceeds 50% by mass and is 100% by mass or less (assuming that the total amount of the structural units constituting polypropylene is 100% by mass). Further, polypropylene preferably has a melting peak temperature of 100°C or higher.

[0119] A propylene random copolymer is a random copolymer having a structural unit derived from propylene and at least one structural unit selected from the group consisting of a structural unit derived from ethylene and a structural unit derived from an α-olefin. Examples of the propylene random copolymer include a propylene-ethylene random copolymer, a propylene-ethylene-α-olefin random copolymer, and a propylene-α-olefin random copolymer. The α-olefin is preferably an α-olefin having 4 to 10 carbon atoms, and examples of such an α-olefin 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 kind or two or more kinds.

[0120] Examples of the production methods of the propylene homopolymer and the propylene random copolymer include slurry polymerization method, solution polymerization method, bulk polymerization method, and gas phase polymerization method using a Ziegler-Natta catalyst or a complex catalyst such as a metallocene complex and a non-metallocene complex.

[0121] The propylene polymerization material is a polymerization material composed of a propylene homopolymer component (I), an ethylene copolymer component (II) having at least one constitutional unit selected from the group consisting of a constitutional unit derived from propylene and a constitutional unit derived from an α-olefin having 4 or more carbon atoms, and a constitutional 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 4 or more and 20 or less carbon atoms, more preferably an α-olefin having 4 or more and 10 or less carbon atoms, and still 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 kind or two or more kinds.

[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 polymerization material can be produced by multi-stage polymerization using a polymerization catalyst. For example, the propylene polymerization material can be produced by producing the propylene homopolymer component (I) in the previous polymerization step and producing the ethylene copolymer component (II) in the subsequent polymerization step.

[0125] Examples of the polymerization catalyst used for producing the propylene polymerization material include catalysts used for producing a propylene homopolymer and a propylene random copolymer.

[0126] Examples of the polymerization method in each polymerization step for producing the propylene polymerization material include bulk polymerization, solution polymerization, slurry polymerization, and gas-phase polymerization. Examples of the inert hydrocarbon solvent used in the solution polymerization method and the slurry polymerization method include propane, butane, isobutane, pentane, hexane, heptane, and octane. These polymerization methods may be combined in two or more, and may be either batch or continuous. The polymerization method in the production of the propylene polymerization material is preferably continuous gas-phase polymerization, bulk polymerization, or bulk-gas-phase polymerization in which bulk polymerization and gas-phase polymerization are continuously carried out.

[0127] Polypropylene as Polymer 2 is preferably a propylene homopolymer.

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

[0129] Examples of the 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-butyrate) 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-ethyl acrylate copolymers, ethylene-n-propyl acrylate copolymers, ethylene-n-butyl acrylate copolymers, ethylene-methyl methacrylate copolymers, ethylene-ethyl methacrylate copolymers, ethylene-n-propyl methacrylate copolymers, ethylene-n-butyl methacrylate copolymers, ethylene-vinyl formate copolymers, ethylene-vinyl acetate copolymers, ethylene-vinyl propionate copolymers, ethylene-vinyl (n-butyrate) copolymers, ethylene-methyl vinyl ether copolymers, ethylene-ethyl vinyl ether copolymers, ethylene-n-propyl vinyl ether copolymers, ethylene-n-butyl vinyl ether copolymers, ethylene-maleic anhydride copolymers, ethylene-glycidyl acrylate copolymers, ethylene-glycidyl methacrylate copolymers, ethylene-3-(dimethylamino)propyl acrylate copolymers, and ethylene-3-(dimethylamino)propyl methacrylate copolymers.

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

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

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

[0133] Examples of the ethylene-carboxylic acid vinyl copolymer include ethylene-vinyl formate copolymers, ethylene-vinyl acetate copolymers, ethylene-vinyl propionate copolymers, and ethylene-vinyl (n-butyrate) copolymers.

[0134] The polymer 2 is more preferably an ethylene-unsaturated carboxylic acid copolymer or an ethylene-unsaturated carboxylic acid ester copolymer, and still 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) measured at a temperature of 190°C and a load of 21 N in accordance with JIS K7210 in the range of 0.1 to 100 g / 10 min. More preferably, it is in the range of 0.1 to 30 g / 10 min.

[0136] (Low molecular weight compound) The heat storage composition and the granular material 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 its molecular weight is 2000 or less.

[0137] The molecular weight of Compound L is preferably 290 to 1000, and more preferably 290 to 600. Compound L may be a "polymer" such as a dimer. Compound L may have a melting peak temperature (highest crystal 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 within the range of 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, sugar alcohols, etc. These may be encapsulated in organic microcapsules, fixed by a gelling agent, or encapsulated in a container such as plastic.

[0139] Compound L preferably has an alkyl group having 14~30 (14 to 30 carbon atoms). Examples of the alkyl group having 14~30 carbon atoms include a linear alkyl group having 14~30 carbon atoms and a branched alkyl group having 14~30 carbon atoms. Preferably, it is a linear alkyl group having 14~30 carbon atoms, more preferably a linear alkyl group having 14~24 carbon atoms, and even more preferably a linear alkyl group having 16~22 carbon atoms.

[0140] Examples of the linear alkyl group having 14~30 carbon atoms include, for example, n-tetradecyl group, n-pentadecyl group, n-hexadecyl group, n-heptadecyl group, n-octadecyl group, n-nonadecyl group, n-eicosyl group, n-henicosyl group, n-docosyl group, n-tricosyl group, n-tetracosyl group, n-pentacosyl group, n-hexacosyl group, n-heptacosyl group, n-octacosyl group, n-nonacosyl group, and n-triacontyl group.

[0141] Examples of the branched alkyl group having 14~30 carbon atoms include, for example, isotetradecyl group, isopentadecyl group, isohexadecyl group, isoheptadecyl group, isooctadecyl group, isononadecyl group, isoeicosyl group, isohenicosyl group, isodocosyl group, isotricosyl group, isotetracosyl group, isopentacosyl group, isohexacosyl group, isoheptacosyl group, isooctacosyl group, isononacosyl group, and 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 of the same or different types) selected from the above compounds.

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

[0144] The fatty acid is preferably a straight-chain saturated fatty acid, a straight-chain unsaturated fatty acid, a branched saturated fatty acid, or a branched unsaturated fatty acid, and particularly preferably a straight-chain saturated fatty acid. Examples of the straight-chain saturated fatty acid include n-tetradecanoic acid, n-hexadecanoic acid, n-octadecanoic 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, n-triacontanoic acid, and the like.

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

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

[0147] Examples of the straight-chain saturated fatty acid ester 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, 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, tetracosyl n-butanoate, 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, octadecyl n-hexanoate, 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, tetracosyl n-nonanoate, 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, octadecyl n-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, octyl n-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 n-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, pentyl n-eicosanoate, 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, heptyl n-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;Methyl n - triacontanoate, 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 straight - chain saturated fatty acid ester may be a compound in which a plurality of fatty acid esters are bonded like triacylglycerol.

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

[0150] Examples of the straight - chain saturated aliphatic ether 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, n-tetradecyl triacontyl 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 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 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 ether, n-tetracosyl triacontyl ether;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 the linear saturated aliphatic ketone 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, n-tetradecyl eicosyl 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-dieicosyl ketone, n-eicosyl docosyl ketone, n-eicosyl tetracosyl ketone, n-eicosyl hexacosyl ketone, n-eicosyl octacosyl 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 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 ketone; 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 the linear saturated aliphatic alcohol include n-tetradecyl alcohol, n-pentadecyl alcohol, n-hexadecyl alcohol, n-heptadecyl alcohol, n-octadecyl alcohol, n-nonadecyl alcohol, n-eicosyl alcohol, n-henicosyl 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 the 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 granular material, the content of Compound L contained in the granular material may be 3 parts by mass or more and 1000 parts by mass or less, 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 with respect to 100 parts by mass of Polymer 1.

[0158] The heat storage composition and the granular material may contain known additives as necessary. Examples of the additives include inorganic fillers, organic fillers, flame retardants, antioxidants, weathering agents, ultraviolet absorbers, heat stabilizers, light stabilizers, lubricants, antiblocking agents, antistatic agents, antifogging agents, non-dripping agents, crystal nucleating agents, pigments, dyes, adsorbents, metal chlorides, hydrotalcite, aluminate, silicone compounds, antibacterial agents, deodorants, light absorption heat generating materials, moisture absorption heat generating materials, and far infrared heat generating materials.

[0159] Examples of the inorganic fillers include talc, calcium carbonate, and calcined kaolin. Examples of the organic fillers include fibers, wood powder, and cellulose powder. Examples of the pigments include titanium dioxide and carbon black. Examples of the metal chlorides include iron chloride and calcium chloride. Examples of the adsorbents include metal oxides such as zinc oxide and magnesium oxide.

[0160] Examples of the antioxidant include phenolic antioxidants, sulfur antioxidants, phosphorus antioxidants, lactone antioxidants, and vitamin antioxidants. Examples of the ultraviolet absorber include benzotriazole ultraviolet absorbers, triamine ultraviolet absorbers, anilide ultraviolet absorbers, and benzophenone ultraviolet absorbers. Examples of the light stabilizer include hindered amine light stabilizers and benzoate light stabilizers. Examples of the lubricant include fatty acids, higher alcohols, aliphatic amides, and aliphatic esters.

[0161] When the heat storage composition contains an additive, the additive may be premixed with one or more raw materials used in the manufacturing process of the heat storage composition, or may be added after the heat storage composition is manufactured. When the above manufacturing includes a crosslinking step of the polymer, the additive may be added to the polymer before crosslinking or after crosslinking. When an additive is added to the heat storage composition after the heat storage composition is manufactured, the additive can be added while melt-kneading the heat storage composition.

[0162] The blending amount of the additive is preferably 0.001 to 10 parts by mass, more preferably 0.005 to 5 parts by mass, and still more preferably 0.01 to 1 part by mass with respect to 100 parts by mass of the heat storage composition.

[0163] The heat storage composition may be prepared by previously melt-kneading polymer 1 and, if necessary, polymer 2, compound L, and other additives to prepare a high-concentration masterbatch, and then further adding compound L and / or polymer 1 and melt-kneading to produce the composition.

[0164] The heat storage composition may be produced by simply mixing Compound L and Polymer 1 with other additives, etc. as required, or by dissolving Compound L in a solvent and then mixing Polymer 1 and other additives, etc. as required, or by dissolving Polymer 1 in a solvent and then mixing Compound L and other additives, etc. as required, or by mixing Compound L and Polymer 1 with a solvent or a solution obtained by dissolving other additives, etc. in a solvent as required, or by mixing a solution obtained by dissolving Compound L in a solvent with a solution obtained by dissolving Polymer 1 and other additives, etc. in a solvent as required.

[0165] The heat storage composition may be produced by previously simply mixing Compound L and Polymer 1 with other additives, etc. as required, or dissolving them in a solvent and then mixing them to prepare a high-concentration masterbatch, and then further adding Compound L or Polymer 1 as it is or dissolved in a solvent as required and mixing them.

[0166] The heat storage composition may be produced by mixing a monomer or prepolymer of Polymer 1 with other additives, etc. as required, or by further polymerization. Examples of the polymerization method include bulk polymerization, cast polymerization, solution polymerization, suspension polymerization, and emulsion polymerization.

[0167] (Granulation of the molded body) The molded body containing Polymer 1 produced by molding the heat storage composition can be granulated by crushing.

[0168] The method for molding the heat storage composition is not particularly limited. For example, injection molding, extrusion molding, vacuum molding, pressure air molding, press molding, transfer molding, casting molding, compression molding, lamination 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, pultrusion molding, and other molding methods can be mentioned.

[0169] Examples of the molded body include injection molded body, extrusion molded body, vacuum molded body, pressure air molded body, press molded body, transfer molded body, casting molded body, compression molded body, lamination molded body, inflation molded body, calendar molded body, blow molded body, hollow molded body, two-color molded body, foam molded body, insert molded body, in-mold coating molded body, rotational molded body, hand lay-up molded body, spray-up molded body, matched die molded body, vacuum injection molded body, filament winding molded body, centrifugal molded body, pultrusion molded body, sheet, and film. The molded body may have a single-layer structure or a multilayer 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 21 N load is preferably 0.1 to 30 g / 10 min.

[0171] The molded body may be a multilayer structure including a heat storage layer containing the 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, more preferably polypropylene (PP), polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), polybutylene terephthalate (PBT), polyamide 6 (PA6), or polyamide 66 (PA66).

[0172] The method of granulating the shaped body is not particularly limited, and examples thereof include granulation methods using machines such as cutters, cutting machines, grinders, shredders, etc.

[0173] In one aspect, since the heat storage composition is excellent in heat storage performance, formability, shape retention, and moisture permeability, the granules produced from the heat storage composition according to the present embodiment can be suitably used, for example, as products or their members for which heat insulation and cold insulation performance are directly or indirectly required.

[0174] Products or their members for which heat insulation and cold insulation performance are directly or indirectly required include, for example, building materials, furniture, interior goods, bedding, bathroom materials, vehicles, air conditioning equipment, household appliances, heat-insulated containers, clothing, daily necessities, agricultural materials, fermentation systems, thermoelectric conversion systems, and heat transfer media.

[0175] Examples of building materials include floor materials, wall materials, wallpapers, ceiling materials, roof materials, floor heating systems, tatami mats, doors, sliding doors, storm doors, shoji screens, windows, and window frames.

Examples

[0176] Hereinafter, the present invention will be described in more detail by way of examples and comparative examples, but the present invention is not limited to the 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 (DSC Q100 manufactured by TA Instruments), in a nitrogen atmosphere, DSC measurement was performed on an aluminum pan containing the sample under the following measurement conditions. (Measurement condition 1) An aluminum pan containing about 10 mg of the sample was held at 150 °C for 5 minutes, then cooled from 150 °C to -80 °C at a rate of 5 °C / min, then held at -80 °C for 10 minutes, and then heated from -80 °C to about 150 °C at a rate of 5 °C / min. (Measurement condition 2) An aluminum pan containing about 10 mg of the sample is 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 about 200 °C at a rate of 5 °C / min.

[0178] The differential scanning calorimetry curve obtained by calorimetry measurement in step (4) of each measurement condition is defined as the melting curve. The melting curve is analyzed by a method conforming to 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 conforming to JIS K7121-1987. The melting enthalpy ΔHm (J / g) is obtained by analyzing the portion within the temperature range of 10 to 60 °C of the melting curve by a method conforming to JIS K7122-1987.

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

[0180] Using a nuclear magnetic resonance spectrometer (manufactured by Bruker BioSpin Corporation, AVANCE III 600HD NMR), the NMR spectrum of the ethylene-methyl acrylate copolymer was measured under the conditions shown below. The constitutional unit (ethylene unit) derived from ethylene contained in the ethylene-methyl acrylate copolymer determined from the NMR spectrum was 84.1 mol%, and the constitutional unit (methyl acrylate unit) derived from methyl acrylate was 15.9 mol%. Measurement probe: 10 mm cryoprobe Measurement solvent: A mixed solution of 1,2-dichlorobenzene / 1,1,2,2-tetrachloroethane-d2 = 85 / 15 (volume ratio) Sample concentration: 100 mg / mL Measured temperature: 135°C Measurement method: Proton decoupling method Number of integrations: 256 times Pulse width: 45 degrees Pulse repetition time: 4 seconds Measurement standard: Tetramethylsilane

[0181] (Synthesis Example 2) After replacing the inside of the reactor equipped with a stirrer with nitrogen, 97 parts by mass of 1-octadecanol (purity 95% or more) and 0.60 parts by mass of tetra isopropyl orthotitanate (manufactured by Nippon Soda Co., Ltd.) were added to 100 parts by mass of ethylene-methyl acrylate, and heating and stirring were carried out at an internal temperature of 145°C or more and 150°C or less 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. The ethylene unit contained in Polymer A-1 was 84.1 mol%, the n-octadecyl acrylate unit was 13.4 mol%, and the methyl acrylate unit was 2.5 mol%. Also, when DSC measurement was performed under Measurement Condition 1, the Tm (°C) of Polymer A-1 was 36°C and ΔHm was 83 J / g.

[0182] [Preparation of Granules] To prepare the granules, the following materials were prepared. As the kneading device, a twin-screw extruder M1 (screw diameter: 75 mm, screw effective length / screw diameter: 40) and a single-screw extruder M2 (screw diameter = 20 mm) were used. [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 (half-life temperature for 1 minute: 180°C) (manufactured by NOF Corporation, CH-12) [Crosslinking Aid] 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 "Hycross MS50") <Antioxidant> G-1: Pentaerythritol tetrakis[3-(3’,5’-di-tert-butyl-4’-hydroxyphenyl)propionate] (manufactured by SONGWON, 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 bisoleic amide (manufactured by NOF Corporation, trade name “Alfloc AD-281F”) <Surface material> J-1: Polypropylene (MFR: 8, manufactured by Sumitomo Chemical Co., Ltd.)

[0183] (Production Example 1) 82.9 parts by mass of Polymer A-1, 10.9 parts by mass of D-1, 4.9 parts by mass of E-1, 0.1 part by mass of G-1, 0.1 part by mass of H-1, and 0.1 part by mass of I-1 were supplied to a twin-screw extruder M1 and melt-kneaded at a screw rotation speed of 350 rpm, a discharge rate of 150 kg / hr, and a maximum barrel temperature of 220°C to prepare a resin composition. Also, J-1 was supplied to a single-screw extruder M2 and melt-kneaded at a screw rotation speed of 74.0 Hz, a discharge rate of 8 kg / hr, and a maximum barrel temperature of 280°C to prepare a sheet-like J-1. Next, using a multilayer sheet molding machine equipped with a multilayer die, the resin composition and J-1 were subjected to multilayer extrusion at a die temperature of 230°C such 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, pellets (granular bodies containing Polymer 1) of Heat Storage Composition 1 with a size of 7 mm square were prepared. After melting and kneading the pellets to homogenize them, DSC measurement was performed under Measurement Conditions 2, and the Tm was 35°C and the ΔHm was 68 J / g.

[0184] [Packaging container] As a packaging container for the pellets, bags shown in Table 1 were prepared, and test pieces of 50 mm × 130 mm were created from each bag. Using a gas permeability evaluation apparatus, the gas permeability of the test pieces was measured according to the following procedure. Type B Gurley densometer (Toyosha Co., Ltd.) · Circular hole = 645.16 mm · Elastic gasket = thin flat type (hardness Durometer 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 Type B Gurley densometer was lifted to suck in 50 mL of air, and then the test piece was set and the measurement was started. The time taken for 50 mL of air to pass through was calculated by doubling the time it took for 50 mL of air to pass through at the gas permeability rate [seconds / 100 mL]. If no air passed through 5 mL in 300 seconds, it was determined that there was no gas permeability.

[0186]

Table 1

[0187] [Preparation of articles] (Example 1) After cutting K - 1 to 40 cm × 40 cm, a bag was made by heat - sealing the ends. After putting 6600 g of the pellets of heat - storage composition 1 into the made bag, the article was made by sealing it with a cloth adhesive tape.

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

[0189] (Example 8) After cutting K - 2 to 40 cm × 40 cm, a bag was made by heat - sealing the ends. Articles were made in the same manner as in Example 1, except that 720 g of the pellets of heat - storage composition 1 were put into the made 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 put into K-1.

[0191] The basis weight and filling rate of the produced article are shown in Table 2. The filling rate of the pellets was calculated with the limit amount that the pellets could be packed into the packaging container as 100% filling rate.

[0192]

Table 2

[0193] [Evaluation of Article] (Examples 4 to 8, Comparative Example 1) The obtained article was installed on the ceiling part of the box model, and the temperature and heat absorption amount at each measurement point were measured by the measurement method shown below. The results are shown in Table 3.

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

[0195] [Fabrication of Box Model] A box model was fabricated using the following materials. Figure 1 is a schematic diagram of the inside of the fabricated box model. (Square bar: all 35 mm square) Length · Square bar - 1: 600 mm, 4 pieces · Square bar - 2: 530 mm, 8 pieces · Square bar - 3: 360 cm, 2 pieces · Square bar - 4: 600 cm, 12 pieces · Square bar - 5: 80 cm, 16 pieces · Square bar - 6: 670 cm, 8 pieces · Square bar - 7: 670 cm, 4 pieces · Square bar - 8: 300 cm, 4 pieces (Plywood: all 10 mm thick) Width × Length · Plywood - 1: 910 × 910 mm, 1 piece · Plywood - 2: 600 × 600 mm, 1 piece · Plywood board - 3: 1 piece of 600×600 mm · Plywood board - 4: 1 piece of 910×910 mm (Insulation material): Styrofoam IB (manufactured by DuPont), width × length × thickness · Insulation material - 1: 1 piece of 530×530×30 mm · Insulation material - 2: 4 pieces of 600×700×30 mm · Insulation material - 3: 4 pieces of 600×700×20 mm · Insulation material - 4: 12 pieces of 90×600×30 mm · Insulation material - 5: 16 pieces of 150×150×25 mm · Insulation material - 6: 8 pieces of 80×530×30 mm · Insulation material - 7: 1 piece of 530×530×30 mm · Insulation material - 8: 2 pieces of 100×400×30 mm · Insulation material - 9: 2 pieces of 100×600×30 mm (Wire mesh: 10 mm grid), width × length · 1 piece of 600×600 mm (Heater: Horikotatsu Heater YMD - 605R, manufactured by Yamazen Corporation), width × length × height · 1 unit of 290×360×85 mm (Plastic wood lath: PM4A, manufactured by Fukubi Chemical Industry Co., Ltd.) · 16 pieces

[0196] After assembling the 600 - mm cube frame 10 using angle bar - 1 (1A) and angle bar - 2 (1B), insulation material - 1 (3A), plywood board - 2 (2B), angle bar - 3 (1C), and heater 20 were installed at the bottom of the cube frame 10. Then, angle bar - 4 (1D), angle bar - 5 (1E), and insulation material - 6 (3F) were assembled and installed at the four corners of the cube frame 10, and insulation material - 2 (3B) and insulation material - 3 (3C) were installed on the outer periphery of the cube frame 10. Parts obtained by stacking 3 pieces of insulation material - 4 (3D) and 4 pieces of insulation material - 5 (3E) respectively were assembled and installed at the four corners of the cube frame 10. Angle bar - 6 (1F) was nailed to angle bar - 4 (1D), and insulation material - 3 (3C) was pressed and fixed using plastic wood lath. Also, the lower part of the cubic frame 10 was assembled using the square timber -7(1G), square timber -8(1H), heat insulation material -7(3G), and veneer board -1(2A), and a hole with a diameter of 30 mm was made as the cord outlet. The veneer board -3(2C), heat insulation material -8(3H), heat insulation material -9(3I), veneer board -4(2D), and wire mesh 4 were installed on the upper part of the cubic frame 10.

[0197] <Measurement of Thermal Properties> Two thermocouples (T thermocouple temperature sensors, ESCO Co., Ltd.) and two heat flux meters (heat sensor HF - 30s, Hideo Seiki Co., Ltd.) were prepared. As shown in Fig. 1, a thermocouple 21A for measuring the temperature inside the box was installed inside the box, a thermocouple 21B for measuring the space temperature was installed on the lower surface of the veneer board -4(2D), a heat flux meter 22A was installed on the upper surface of the veneer board -3(2C), and a heat flux meter 22B was installed on the lower surface of the veneer board -4(2D).

[0198] The measurement of thermal properties was carried out according to the following procedure. (1) An article was placed on the wire mesh 4 in Fig. 1, and the heat insulation materials -2(3B) and -3(3C) on the wall surface of the box and the upper veneer board -4(2D) were opened. (2) The temperature in the laboratory was set to 24 °C, and the temperature inside the box and the article was made constant. (3) After closing the box with the heat insulation materials -2(3B), -3(3C) and the veneer board -4(2D), the entire box was covered with a blue sheet (width × length 3400 × 3400 mm). (4) The dial of the heater was set to the lowest output, the power was turned on to start heating, and after 4 hours of heating, the power was turned off. Using the data after 2 hours of heating, the following evaluation was carried out.

[0199] The temperature rise suppression temperature ΔT [°C] was obtained from the difference between the space temperature T1 in Reference Example 1 when no article was placed on the wire mesh 30 and the space temperature T2 when each article was placed on the wire mesh 30. The difference in the integrated value of the heat flux [W / m 2 measured by the heat flux meter -1 and the thermocouple -2 with respect to time was taken to calculate the absorbed heat quantity [kJ / m 2 in the space between the veneer board -2(2B) and the veneer board -3(2C).

[0200]

Table 3

Explanation of Symbols

[0201] 1A…Angle material - 1, 1B…Angle material - 2, 1C…Angle material - 3, 1D…Angle material - 4, 1E…Angle material - 5, 1F…Angle material - 6, 1G…Angle material - 7, 1H…Angle material - 8, 2A…Veneer board - 1, 2B…Veneer board - 2, 2C…Veneer board - 3, 2D…Veneer board - 4, 3A…Heat insulation material - 1, 3B…Heat insulation material - 2, 3C…Heat insulation material - 3, 3D…Heat insulation material - 4, 3E…Heat insulation material - 5, 3F…Heat insulation material - 6, 3G…Heat insulation material - 7, 3H…Heat insulation material - 8, 3I…Heat insulation material - 9, 4…Wire mesh, 10…Cube frame, 20…Heater, 21A…Thermocouple, 21B…Thermocouple, 22A…Calorimeter, 22B…Calorimeter.

Claims

1. An article comprising a packaging container and granular material filled in the packaging container at a basis weight of 0.1 g / cm ２ or more, wherein the granular material contains a polymer having a melting enthalpy of 30 J / g or more observed in a temperature range of 10°C or more and 60°C or less by differential scanning calorimetry, and the article has heat storage performance.

2. The article according to claim 1, wherein the polymer has a structural unit represented by the following formula (1). 【Chemical 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 represents 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)-, and L １３ represents a single bond, -CO-O-, -O-CO-, -O-, -CO-NH-, -NH-CO-, -CO-NH-CO-, -NH-CO-NH-, -NH-, or -N(CH ３ )-, and L １６ represents an alkyl group having 14 or more and 30 or less carbon atoms. ]

3. The article according to claim 2, wherein the polymer has a structural unit 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 according to claim 1, wherein the filling amount of the granular material is less than 20 kg.

6. The article according to claim 1, wherein the packaging container has air permeability.

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

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