JP2020045411A - Latent heat storage material composition - Google Patents

Latent heat storage material composition Download PDF

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JP2020045411A
JP2020045411A JP2018174363A JP2018174363A JP2020045411A JP 2020045411 A JP2020045411 A JP 2020045411A JP 2018174363 A JP2018174363 A JP 2018174363A JP 2018174363 A JP2018174363 A JP 2018174363A JP 2020045411 A JP2020045411 A JP 2020045411A
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latent heat
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JP7191610B2 (en
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中嶋 孝宏
Takahiro Nakajima
孝宏 中嶋
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Kansai Research Institute KRI Inc
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Abstract

To provide a latent heat storage material composition capable of easily controlling a crystallization temperature by promoting supercooling of a latent heat storage material.SOLUTION: There is provided a latent heat storage material composition comprising a fatty acid having 8 or more carbon atoms (A) and a polymer (B) using an unsaturated hydrocarbon and at least one selected from the group consisting of acrylic acid, methacrylic acid and esters thereof as a monomer. The polymer (B) preferably is a polymer having a polyolefin structure in which the monomer is composed of an unsaturated hydrocarbon.SELECTED DRAWING: None

Description

本発明は、潜熱蓄熱材組成物に関し、とくには、過冷却が促進された潜熱蓄熱材組成物に関する。   The present invention relates to a latent heat storage material composition, and more particularly to a latent heat storage material composition in which supercooling is promoted.

潜熱蓄熱材は、融解と凝固(結晶化)を繰り返すことで蓄熱と放熱を行うもので、蓄熱した熱エネルギーを取り出す温度は、蓄熱材の結晶化の温度で決まる。熱エネルギーをより有効に利用する観点から、熱が必要な温度やタイミングで取り出せるように制御できることが望まれる。結晶化温度の制御に関する従来技術としては、酢酸ナトリウム3水和物等の水和塩系化合物やエリスリトール等の糖アルコールなどの過冷却現象を起こしやすい化合物へ核剤を添加して過冷却を防止する技術が知られている。一方、過冷却を促進するような物質についてはほとんど知られておらず、例えば、特許文献1、2に開示されているようなものが挙げられる。特許文献1、2は、いずれも糖アルコールの過冷却促進に関するものであるが、糖アルコールはもともと過冷却を起こしやすいものであることから、過冷却を更に進めることはできても、結晶化の温度を制御することは困難である。   The latent heat storage material performs heat storage and heat dissipation by repeating melting and solidification (crystallization). The temperature at which the stored heat energy is extracted is determined by the crystallization temperature of the heat storage material. From the viewpoint of using thermal energy more effectively, it is desired that heat can be controlled so that it can be extracted at a required temperature and timing. As a conventional technique for controlling the crystallization temperature, a nucleating agent is added to a compound which is likely to cause a supercooling phenomenon such as a hydrate salt compound such as sodium acetate trihydrate or a sugar alcohol such as erythritol to prevent supercooling. Techniques for doing so are known. On the other hand, substances that promote supercooling are hardly known, and examples thereof include those disclosed in Patent Documents 1 and 2. Patent Documents 1 and 2 relate to promotion of supercooling of sugar alcohols. However, since sugar alcohols are liable to cause supercooling from the beginning, even if supercooling can be further advanced, crystallization of It is difficult to control the temperature.

特開2015−187230号公報JP 2015-187230 A 特開2011−153206号公報JP 2011-153206 A

本発明の目的は、潜熱蓄熱材の過冷却を促進して、結晶化温度を容易に制御できる潜熱蓄熱材組成物を開発することにある。   An object of the present invention is to develop a latent heat storage material composition that promotes supercooling of a latent heat storage material and can easily control a crystallization temperature.

本発明者は、上記課題の解決へ向けて鋭意検討した結果、ステアリン酸等の脂肪酸は過冷却現象を起こしにくい潜熱蓄熱材であるが、これに特定の化合物を添加することで過冷却を促進できることを見いだし、本発明を完成するに至った。
すなわち、本発明は下記[1]〜[3]に記載の事項を特徴とするものである。
[1] 炭素数が8以上の脂肪酸(A)と不飽和炭化水素、ならびに、アクリル酸、メタクリル酸およびそれらのエステル類からなる群より選ばれる少なくとも1種を単量体とする高分子(B)とからなる潜熱蓄熱材組成物。
[2] 前記高分子(B)が、ポリオレフィンの構造を有する高分子であることを特徴とする前記[1]に記載の潜熱蓄熱材組成物。
[3] 前記脂肪酸(A)と前記高分子(B)の合計量に対する前記脂肪酸(A)の割合が重量比で50%以上99%以下であることを特徴とする前記[1]または[2]に記載の潜熱蓄熱材組成物。
The present inventors have conducted intensive studies to solve the above-described problems, and as a result, fatty acids such as stearic acid are latent heat storage materials that are unlikely to cause a supercooling phenomenon. They have found what they can do and have completed the present invention.
That is, the present invention is characterized by the following items [1] to [3].
[1] A polymer (B) comprising, as a monomer, at least one selected from the group consisting of fatty acids (A) having 8 or more carbon atoms, unsaturated hydrocarbons, and acrylic acid, methacrylic acid and esters thereof. ). A latent heat storage material composition comprising:
[2] The latent heat storage material composition according to [1], wherein the polymer (B) is a polymer having a polyolefin structure.
[3] The ratio of the fatty acid (A) to the total amount of the fatty acid (A) and the polymer (B) is not less than 50% and not more than 99% by weight, wherein [1] or [2]. ] The latent heat storage material composition according to [1].

本発明の潜熱蓄熱材組成物は、過冷却現象を起こしにくい化合物に対して過冷却を促進するものであることから、結晶化温度の制御が容易にできる。   Since the latent heat storage material composition of the present invention promotes supercooling of a compound that hardly causes a supercooling phenomenon, the crystallization temperature can be easily controlled.

本発明の潜熱蓄熱材組成物を構成する炭素数が8以上の脂肪酸(A)としては、例えば、オクタン酸、ノナン酸、カプリン酸、ラウリン酸、ミリスチン酸、パルミチン酸、ステアリン酸等が挙げられる。   Examples of the fatty acid having 8 or more carbon atoms (A) constituting the latent heat storage material composition of the present invention include octanoic acid, nonanoic acid, capric acid, lauric acid, myristic acid, palmitic acid, and stearic acid. .

本発明の潜熱蓄熱材組成物を構成する高分子(B)について以下に説明する。
前記高分子(B)は、不飽和炭化水素、ならびに、アクリル酸、メタクリル酸およびそれらのエステル類からなる群より選ばれる少なくとも1種を単量体とする高分子である。
不飽和炭化水素としては、例えば、エチレン、プロピレン、ブテン、ペンテン、ヘキセン、ブタジエン、イソプレン、シクロペンテン、シクロヘキセン、ノルボルネン、シクロペンタジエン、シクロヘキサジエン、ジシクロペンタジエン、スチレン等が挙げられる。
アクリル酸のエステルとしては、例えば、アクリル酸メチル、アクリル酸エチル、アクリル酸プロピル、アクリル酸ブチル等が挙げられる。メタクリル酸のエステルとしては、例えば、メタクリル酸メチル、メタクリル酸エチル、メタクリル酸プロピル、メタクリル酸ブチル等が挙げられる。
これらのうち、本発明の高分子(B)としては、不飽和炭化水素からなる群より選ばれる少なくとも1種を単量体として含んでなる高分子であることが好ましい。不飽和炭化水素としては不飽和の脂肪族炭化水素であることが好ましい。不飽和の脂肪族炭化水素の中でも鎖状のもの、すなわちアルケン(オレフィン)であることがより好ましい。
すなわち、本発明の高分子(B)としては、ポリオレフィンの構造を有するものであることが好ましく、このような高分子としては、ポリエチレン、ポリプロピレンやその他のα−オレフィンを重合したものなどが挙げられる。これらの中でも、本発明の高分子(B)としては、ポリエチレンの構造を有するものであることが好ましい。
The polymer (B) constituting the latent heat storage material composition of the present invention will be described below.
The polymer (B) is a polymer containing as a monomer at least one member selected from the group consisting of unsaturated hydrocarbons, acrylic acid, methacrylic acid and esters thereof.
Examples of the unsaturated hydrocarbon include ethylene, propylene, butene, pentene, hexene, butadiene, isoprene, cyclopentene, cyclohexene, norbornene, cyclopentadiene, cyclohexadiene, dicyclopentadiene, and styrene.
Examples of the esters of acrylic acid include methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate and the like. Examples of the esters of methacrylic acid include methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate and the like.
Among these, the polymer (B) of the present invention is preferably a polymer containing as a monomer at least one selected from the group consisting of unsaturated hydrocarbons. The unsaturated hydrocarbon is preferably an unsaturated aliphatic hydrocarbon. Among unsaturated aliphatic hydrocarbons, a chain-like one, that is, an alkene (olefin) is more preferable.
That is, the polymer (B) of the present invention preferably has a polyolefin structure, and examples of such a polymer include those obtained by polymerizing polyethylene, polypropylene and other α-olefins. . Among these, it is preferable that the polymer (B) of the present invention has a polyethylene structure.

前記高分子(B)の重合度としては、100以上であることが過冷却促進の効果が高く好ましい。   The degree of polymerization of the polymer (B) is preferably 100 or more because the effect of promoting supercooling is high.

前記高分子(B)は、不飽和炭化水素、ならびに、アクリル酸、メタクリル酸およびそれらのエステル類以外の単量体を共重合したものであっても良い。また、グラフト重合や架橋をしたものであっても良く、前記脂肪酸(A)との相溶性や過冷却促進効果および潜熱蓄熱材組成物としての取り扱い易さや物性などの観点から適切なものを選択できる。また、複数種の高分子を混合したものであっても良い。   The polymer (B) may be a copolymer of an unsaturated hydrocarbon and a monomer other than acrylic acid, methacrylic acid and esters thereof. Further, those obtained by graft polymerization or cross-linking may be used, and an appropriate one is selected from the viewpoints of compatibility with the fatty acid (A), an effect of promoting supercooling, ease of handling as a latent heat storage material composition, and physical properties. it can. Further, a mixture of plural kinds of polymers may be used.

不飽和炭化水素、ならびに、アクリル酸、メタクリル酸およびそれらのエステル類以外の単量体を共重合成分として用いる場合の単量体としては、とくに限定はされないが、アクリルアミドおよびその誘導体、メタクリルアミドおよびその誘導体、アクリロニトリル、メタクリロニトリル、ビニルエーテル類、ビニルエステル類、ハロゲン化ビニル、マレイン酸およびそのエステルあるいは無水物等が挙げられる。   Unsaturated hydrocarbons, and monomers when acrylic acid, methacrylic acid and monomers other than their esters are used as the copolymerization component, are not particularly limited, acrylamide and its derivatives, methacrylamide and Derivatives, acrylonitrile, methacrylonitrile, vinyl ethers, vinyl esters, vinyl halides, maleic acid and its esters or anhydrides may be mentioned.

前記高分子(B)は、溶解度パラメータ等で表される極性が前記脂肪酸(A)と近いものを選択すると、前記脂肪酸(A)と前記高分子(B)の相溶性が高くなり、混合し易くなるため好ましい。   When the polymer (B) is selected to have a polarity represented by a solubility parameter or the like close to that of the fatty acid (A), the compatibility between the fatty acid (A) and the polymer (B) increases, and the polymer (B) is mixed. It is preferable because it becomes easy.

前記高分子(B)の好適なものの具体例として、ポリエチレン、ポリプロピレン、エチレン−アクリル酸共重合体、エチレン−メタクリル酸共重合体、エチレン−グリシジルメタクリレート共重合体、エチレン−酢酸ビニル共重合体、ポリエチレン−graft−マレイン酸無水物、ポリプロピレン−graftマレイン酸無水物などが挙げられる。   Specific examples of preferable polymer (B) include polyethylene, polypropylene, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-glycidyl methacrylate copolymer, ethylene-vinyl acetate copolymer, Examples thereof include polyethylene-graft-maleic anhydride and polypropylene-graft maleic anhydride.

本発明の潜熱蓄熱材組成物を構成する前記脂肪酸(A)と前記高分子(B)の合計量に対する前記脂肪酸(A)の割合は、重量比で50%以上99%以下であることが好ましい。前記脂肪酸(A)の割合が50%を下回ると、潜熱蓄熱材組成物としての蓄熱量が小さくなり、99%を上回ると前記高分子(B)の添加効果が小さくなる。前記脂肪酸(A)の割合は、60%以上90%以下であることがより好ましい。   The ratio of the fatty acid (A) to the total amount of the fatty acid (A) and the polymer (B) constituting the latent heat storage material composition of the present invention is preferably 50% to 99% by weight. . When the ratio of the fatty acid (A) is less than 50%, the heat storage amount as the latent heat storage material composition becomes small, and when it exceeds 99%, the effect of adding the polymer (B) becomes small. The proportion of the fatty acid (A) is more preferably 60% or more and 90% or less.

本発明においては、前記脂肪酸(A)と前記高分子(B)を組み合わせの種類により結晶化温度を容易に制御できる。また、前記脂肪酸(A)と前記高分子(B)が同じ成分であっても、前記脂肪酸(A)の割合を調整することによって、結晶化温度を容易に制御できる。   In the present invention, the crystallization temperature can be easily controlled by the type of combination of the fatty acid (A) and the polymer (B). Further, even if the fatty acid (A) and the polymer (B) are the same component, the crystallization temperature can be easily controlled by adjusting the ratio of the fatty acid (A).

本発明の潜熱蓄熱材組成物は、本発明の目的を損なわない限り、他の潜熱蓄熱材と共存して用いることができる。   The latent heat storage material composition of the present invention can be used in combination with other latent heat storage materials as long as the object of the present invention is not impaired.

他の潜熱蓄熱材としては、脂肪族炭化水素、脂肪族アルコール、無機系のものなどが挙げられる。   Other latent heat storage materials include aliphatic hydrocarbons, aliphatic alcohols, inorganic materials, and the like.

脂肪族炭化水素としては、例えば、n−ドデカン、n−テトラデカン、n−ペンタデカン、n−ヘキサデカン、n−ヘプタデカン、n−オクタデカン、n−ノナデカン、n−エイコサン、パラフィンワックス等が挙げられる。   Examples of the aliphatic hydrocarbon include n-dodecane, n-tetradecane, n-pentadecane, n-hexadecane, n-heptadecane, n-octadecane, n-nonadecane, n-eicosane, paraffin wax and the like.

脂肪族アルコールとしては、セチルアルコール、1−オクタデカノール、エリスリトール、ペンタエリスリトール等が挙げられる。   Examples of the aliphatic alcohol include cetyl alcohol, 1-octadecanol, erythritol, pentaerythritol and the like.

無機系のものとしては、硝酸リチウム3水和物、硫酸ナトリウム10水和物、酢酸ナトリウム3水和物、硫酸アルミニウムカリウム12水和物などに代表される無機塩類などが挙げられる。   Examples of the inorganic type include inorganic salts represented by lithium nitrate trihydrate, sodium sulfate decahydrate, sodium acetate trihydrate, potassium aluminum sulfate dodecahydrate and the like.

本発明の潜熱蓄熱材組成物を作製する方法としては、とくに限定はされないが、前記脂肪酸(A)と前記高分子(B)を溶媒中で攪拌や超音波等で混合する方法、少なくとも一方が溶融あるいは液体の状態で混合する方法、あるいはボールミルやミキサー、ホモジナイザー等で機械的に混合する方法などが挙げられる   The method for producing the latent heat storage material composition of the present invention is not particularly limited, and at least one of a method of mixing the fatty acid (A) and the polymer (B) by stirring or ultrasonic waves in a solvent is used. A method of mixing in a molten or liquid state, or a method of mechanically mixing with a ball mill, a mixer, a homogenizer, etc.

本発明の潜熱蓄熱材組成物は、例えば、プラスチックや金属製の袋や容器などに封入して使用したり、溶液を製膜したり、圧縮成形や溶融成形したりして利用することができる。前記高分子(B)が架橋等で3次元的な網目構造を有していると、前記脂肪酸(A)が融点以上で液体となった時の漏出が抑えられるため好ましい。また、前記高分子(B)以外の高分子成分をマトリクスとして用いて、本発明の潜熱蓄熱材組成物を分散して用いることもできる。   The latent heat storage material composition of the present invention can be used, for example, by encapsulating it in a plastic or metal bag or container, or forming a solution into a film, or compression molding or melt molding. . It is preferable that the polymer (B) has a three-dimensional network structure due to crosslinking or the like, since leakage when the fatty acid (A) becomes a liquid at a temperature equal to or higher than the melting point is suppressed. Further, the latent heat storage material composition of the present invention can be dispersed and used by using a polymer component other than the polymer (B) as a matrix.

この場合のマトリクスとなる高分子成分としては、各種の熱可塑性樹脂や熱硬化性樹脂、エラストマー、ゲルなどを用いることができる。   In this case, various kinds of thermoplastic resins, thermosetting resins, elastomers, gels, and the like can be used as the polymer component serving as the matrix.

熱可塑性樹脂としては、ポリエチレン、ポリプロピレン、ポリビニルアルコール、EVA樹脂、EVOH樹脂、ポリスチレン、AS樹脂、ABS樹脂、ASA樹脂、AES樹脂、PMMA等のアクリル樹脂、MS樹脂、MBS樹脂、SBC樹脂、シクロオレフィン樹脂、ポリアセタール樹脂、ポリアミド樹脂、ポリエステル樹脂、ポリカーボネート樹脂、ポリウレタン樹脂、液晶ポリマー、PPS、PEEK、PPE、ポリサルフォン系樹脂、ポリイミド系樹脂、フッ素系樹脂、熱可塑性エラストマーなどが挙げられる   As the thermoplastic resin, polyethylene, polypropylene, polyvinyl alcohol, EVA resin, EVOH resin, polystyrene, AS resin, ABS resin, ASA resin, AES resin, acrylic resin such as PMMA, MS resin, MBS resin, SBC resin, cycloolefin Resin, polyacetal resin, polyamide resin, polyester resin, polycarbonate resin, polyurethane resin, liquid crystal polymer, PPS, PEEK, PPE, polysulfone resin, polyimide resin, fluorine resin, thermoplastic elastomer, etc.

熱硬化性樹脂としては、エポキシ樹脂、フェノール樹脂、シリコーン樹脂、熱硬化性アクリル樹脂などが挙げられる。   Examples of the thermosetting resin include an epoxy resin, a phenol resin, a silicone resin, and a thermosetting acrylic resin.

エラストマーとしては、ブタジエンゴム、スチレン−ブタジエンゴム、ニトリルゴム、ブチルゴム等の共役ジエンゴム、EPMやEPDM等のエチレン・α−オレフィン共重合体ゴム、SEBS等の水添共役ジエン重合体などが挙げられる。   Examples of the elastomer include conjugated diene rubbers such as butadiene rubber, styrene-butadiene rubber, nitrile rubber, and butyl rubber, ethylene / α-olefin copolymer rubbers such as EPM and EPDM, and hydrogenated conjugated diene polymers such as SEBS.

ゲルとしては、ポリアクリル酸ナトリウム、ポリアクリルアミド誘導体、多糖類、ゼラチンなどが挙げられる。   Examples of the gel include sodium polyacrylate, polyacrylamide derivatives, polysaccharides, gelatin and the like.

本発明の潜熱蓄熱材組成物は、本発明の目的を損なわない限り、上記した成分以外にも、熱伝導性フィラーなどの成分と共存して用いて、例えば、蓄熱材への伝熱を促進したりすることができる。   The latent heat storage material composition of the present invention, in addition to the above-described components, is used in combination with a component such as a heat conductive filler, as long as the object of the present invention is not impaired, for example, to promote heat transfer to the heat storage material. Or you can.

熱伝導性フィラーの具体例としては、黒鉛、炭素繊維、カーボンナノファイバー、カーボンナノチューブ、グラフェン、ダイヤモンド等の炭素系化合物、酸化アルミニウム、酸化マグネシウム、酸化ケイ素、酸化チタン、酸化亜鉛、酸化ジルコニウム等の金属酸化物、水酸化アルミニウムや水酸化マグネシウム等の金属水酸化物、炭酸マグネシウムや炭酸カルシウム等の金属炭酸塩、窒化ホウ素、窒化アルミニウム、窒化ケイ素等の窒化物、炭化ケイ素や炭化ホウ素等の炭化物などが挙げられる。   Specific examples of the thermally conductive filler include graphite, carbon fiber, carbon nanofiber, carbon nanotubes, carbon compounds such as graphene and diamond, aluminum oxide, magnesium oxide, silicon oxide, titanium oxide, zinc oxide and zirconium oxide. Metal oxides, metal hydroxides such as aluminum hydroxide and magnesium hydroxide, metal carbonates such as magnesium carbonate and calcium carbonate, nitrides such as boron nitride, aluminum nitride and silicon nitride, and carbides such as silicon carbide and boron carbide And the like.

これらのフィラーは、本発明の潜熱蓄熱材組成物を作製する過程において添加してもよく、本発明の潜熱蓄熱材組成物と混合して用いてもよい。   These fillers may be added in the process of producing the latent heat storage material composition of the present invention, or may be used as a mixture with the latent heat storage material composition of the present invention.

以下、本発明を実施例および比較例を挙げて具体的に説明するが、本発明はもとよりこれらの例に限定されるものではない。   Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.

各実施例および比較例において、評価は以下のように行った。
(融点および凝固点)
TA Instruments製Discovery DSCを用いて、窒素流通下、10℃から100℃まで10℃/分で昇温し、融解のピークトップ(融点)を測定した。また、100℃から0℃まで5℃/分で降温し、結晶化のピークトップ(凝固点)を測定した。
In each example and comparative example, evaluation was performed as follows.
(Melting point and freezing point)
Using a Discovery DSC manufactured by TA Instruments, the temperature was raised from 10 ° C. to 100 ° C. at a rate of 10 ° C./min under nitrogen flow, and the peak top (melting point) of the melting was measured. The temperature was lowered from 100 ° C. to 0 ° C. at a rate of 5 ° C./min, and the peak top (solidification point) of crystallization was measured.

[実施例1]
(a)ステアリン酸50重量部と(b)低密度ポリエチレン50重量部を、160℃にて溶融状態で混合した後、室温まで冷却して潜熱蓄熱材組成物を得た。DSC測定の結果、融点は71℃、凝固点は49℃であった。
[Example 1]
After mixing (a) 50 parts by weight of stearic acid and (b) 50 parts by weight of low-density polyethylene in a molten state at 160 ° C., the mixture was cooled to room temperature to obtain a latent heat storage material composition. As a result of DSC measurement, the melting point was 71 ° C. and the freezing point was 49 ° C.

[実施例2〜7、比較例1〜4]
表1記載の(a)および(b)を用いたこと以外は、実施例1と同様の操作を行い、潜熱蓄熱材組成物を得た。比較例2のみ、(a)と(b)をテトラヒドロフランに溶解、混合した後、溶媒を留去して作製した。各DSC測定の結果を表1に示す。
[Examples 2 to 7, Comparative Examples 1 to 4]
A latent heat storage material composition was obtained in the same manner as in Example 1, except that (a) and (b) described in Table 1 were used. Only Comparative Example 2 was prepared by dissolving and mixing (a) and (b) in tetrahydrofuran, and then distilling off the solvent. Table 1 shows the results of the DSC measurements.

Figure 2020045411
低密度ポリエチレン:アルドリッチ製LDPE、MFR=25g/10min
EVA:エチレン−酢酸ビニル共重合体(酢酸ビニル28%含有)
PE−g−MA:ポリエチレン−graft−マレイン酸無水物 アルドリッチ製、粘度1700−4500cp(140℃)
EGMA:エチレン−グリシジルメタクリレート共重合体 アルドリッチ製、グリシジルメタクリレート8wt%含有
ポリカーボネート:帝人化成製パンライトL−1225L
ポリビニルアルコール:日本合成化学製KL−05
Figure 2020045411
Low density polyethylene: Aldrich LDPE, MFR = 25g / 10min
EVA: ethylene-vinyl acetate copolymer (containing 28% vinyl acetate)
PE-g-MA: polyethylene-graft-maleic anhydride manufactured by Aldrich, viscosity 1700-4500 cp (140 ° C.)
EGMA: ethylene-glycidyl methacrylate copolymer Aldrich, polycarbonate containing 8% by weight of glycidyl methacrylate: Teijin Chemicals Panlite L-1225L
Polyvinyl alcohol: KL-05 manufactured by Nippon Synthetic Chemical

各実施例および比較例の比較から、ステアリン酸、ラウリン酸ともに本発明の高分子(B)と組み合わせることで、融点はほぼ変わらずに凝固点が低下しており、過冷却が促進していることがわかる。一方、比較例2、3のように、本発明の高分子(B)とは異なる高分子を用いた場合は融点、凝固点ともに変化しない。また、実施例4〜6から、ステアリン酸の重量比が少ないものほど凝固点が低くなっていることがわかり、潜熱蓄熱材組成物の組成を変えることで、結晶化温度を制御するという本発明の目的が達成可能であることがわかる。   From the comparison of each Example and Comparative Example, it is found that, by combining stearic acid and lauric acid with the polymer (B) of the present invention, the melting point is almost unchanged, the freezing point is lowered, and supercooling is promoted. I understand. On the other hand, when a polymer different from the polymer (B) of the present invention is used as in Comparative Examples 2 and 3, neither the melting point nor the freezing point changes. Further, from Examples 4 to 6, it can be seen that the smaller the stearic acid weight ratio, the lower the freezing point, and by changing the composition of the latent heat storage material composition, the crystallization temperature is controlled. It turns out that the purpose is achievable.

本発明の潜熱蓄熱材組成物を用いることで、潜熱蓄熱材の過冷却を促進し、結晶化温度を制御することができるので、任意の温度でエネルギーを取り出したり、蓄熱状態を長期維持したりできるようになり、例えば、低温で発熱する保温材などとして利用できる。
また、蓄熱(吸熱)作用を利用して、電子部品等の冷却、急激な発熱の抑制などに用いることができる。

By using the latent heat storage material composition of the present invention, the supercooling of the latent heat storage material can be promoted and the crystallization temperature can be controlled, so that energy can be taken out at any temperature or the heat storage state can be maintained for a long time. It can be used as, for example, a heat insulator that generates heat at a low temperature.
Further, it can be used for cooling electronic components and the like, suppressing rapid heat generation, and the like by utilizing the heat storage (heat absorption) action.

Claims (3)

炭素数が8以上の脂肪酸(A)と不飽和炭化水素、ならびに、アクリル酸、メタクリル酸およびそれらのエステル類からなる群より選ばれる少なくとも1種を単量体とする高分子(B)とからなる潜熱蓄熱材組成物。   A fatty acid having 8 or more carbon atoms (A) and an unsaturated hydrocarbon, and a polymer (B) containing at least one monomer selected from the group consisting of acrylic acid, methacrylic acid and esters thereof. Latent heat storage material composition. 前記高分子(B)が、ポリオレフィンの構造を有する高分子であることを特徴とする請求項1に記載の潜熱蓄熱材組成物。   The latent heat storage material composition according to claim 1, wherein the polymer (B) is a polymer having a polyolefin structure. 前記脂肪酸(A)と前記高分子(B)の合計量に対する前記脂肪酸(A)の割合が重量比で50%以上99%以下であることを特徴とする請求項1または2に記載の潜熱蓄熱材組成物。
3. The latent heat storage according to claim 1, wherein a ratio of the fatty acid (A) to a total amount of the fatty acid (A) and the polymer (B) is 50% or more and 99% or less by weight ratio. 4. Material composition.
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