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JP2007217586A - Heat-insulating coating and heat-insulating material - Google Patents

Heat-insulating coating and heat-insulating material Download PDF

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JP2007217586A
JP2007217586A JP2006040634A JP2006040634A JP2007217586A JP 2007217586 A JP2007217586 A JP 2007217586A JP 2006040634 A JP2006040634 A JP 2006040634A JP 2006040634 A JP2006040634 A JP 2006040634A JP 2007217586 A JP2007217586 A JP 2007217586A
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heat
aggregate
shielding
pigment
resin
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Shinichi Ishikawa
眞一 石川
Naomasa Tabata
直優 田畑
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YAMAMOTO YOGYO KAKO CO Ltd
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YAMAMOTO YOGYO KAKO CO Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating excellent in a heat-shielding property and a heat-insulating property, even when finished in a black color or a near concentrated color. <P>SOLUTION: This heat-shielding coating contains heat-shielding aggregates prepared by adhering a pigment to the surfaces of aggregates. The aggregates are obtained by crushing natural silica such as granite or basalt, corundum, sand stone or volcanic pumice. The pigment includes pigments having high reflection powers to near IR rays, for example, organic pigments azo-based, phthalocyanine-based or perylene-based organic pigments or inorganic pigments such as titanium tetraoxide. The heat-shielding coating has an excellent heat-shielding property and an excellent heat-insulating property, and can suitably be used for wall materials, roof materials, coated materials, and the like. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、遮熱効果のある遮熱性塗材、および該遮熱性塗材を用いてなる遮熱材に関する。   The present invention relates to a heat-shielding coating material having a heat-shielding effect and a heat-shielding material using the heat-shielding coating material.

温暖化防止や省エネルギー等の観点から、道路面や屋根等の温度上昇を防止する方法が、従来、種々提案されている。特に、黒色又はそれに近い濃彩色を呈しつつ、遮熱効果を有する遮熱性塗料として、可視領域で吸収を示し近赤外領域では反射を示す顔料(以下、熱反射顔料ともいう)と、耐候性に優れるビヒクルと、シラスバルーンやセラミックバルーンといった中空構造の骨材とを含有する遮熱性塗料が知られている(特許文献1)。
斯かる公報記載の遮熱性塗料によれば、熱反射顔料を塗料中に添加することによって近赤外線を反射し、しかも中空構造の骨材を用いることによって断熱性を高めることができる、とされている。
Various methods for preventing temperature rise on road surfaces, roofs, and the like have been proposed in the past from the viewpoint of preventing global warming and saving energy. In particular, as a heat-shielding paint having a heat-shielding effect while exhibiting black or a dark color near it, a pigment that absorbs in the visible region and reflects in the near-infrared region (hereinafter also referred to as a heat-reflecting pigment), and weather resistance There is known a heat-shielding coating material that contains a vehicle that excels in light and a hollow structure aggregate such as a shirasu balloon or a ceramic balloon (Patent Document 1).
According to such a heat-shielding paint described in the above publication, it is said that heat insulation can be enhanced by reflecting near-infrared rays by adding a heat-reflecting pigment into the paint, and by using a hollow structure aggregate. Yes.

特開2000−129172号公報JP 2000-129172 A

しかしながら、上記のような従来の遮熱性塗料では、シラスバルーンやセラミックバルーンといった骨材の含有量を増やすと該骨材の色が目立ちやすくなる傾向にあり、しかもこれらの骨材は、一般的には白色又はそれに近い色彩であるため、該遮熱性塗料を黒色又は濃彩色に仕上げることが困難となってしまう。
また、骨材の含有量を増やすと、塗料中に含まれる熱反射顔料が骨材の陰に隠れてしまい、該熱反射顔料による近赤外線反射作用が阻害され、遮熱効果が低下しやすくなるという問題がある。
However, in the conventional heat-shielding paint as described above, when the content of aggregate such as shirasu balloon and ceramic balloon is increased, the color of the aggregate tends to be noticeable, and these aggregates are generally Is a white color or a color close to it, it becomes difficult to finish the heat-shielding coating material in black or dark color.
Further, when the aggregate content is increased, the heat reflecting pigment contained in the paint is hidden behind the aggregate, the near infrared reflection action by the heat reflecting pigment is hindered, and the heat shielding effect tends to be lowered. There is a problem.

そこで本発明は、このような従来技術の問題点に鑑み、遮熱性と断熱性に優れた塗装を行うことを一の課題とし、黒色又はそれに近い濃彩色に仕上げた場合であっても遮熱性と断熱性に優れた塗装を行うこと他の課題とする。   Therefore, in view of the problems of the prior art, the present invention has one problem of performing coating with excellent heat shielding properties and heat insulation properties, and even when it is finished in black or a dark color near it. And another task is to paint with excellent heat insulation.

前記課題を解決すべく、本発明者らが鋭意研究したところ、骨材の表面に熱反射顔料を付着させた遮熱骨材を採用することにより、該遮熱骨材の量を大幅に増やして塗材を構成した場合であっても該骨材の色を隠蔽して黒色又は濃彩色に仕上げることが可能となり、しかも該遮熱骨材の表面に付着された熱反射顔料が十分な近赤外線反射作用を発揮し、所望の遮熱効果を奏しうることを見い出した。   In order to solve the above-mentioned problems, the present inventors have intensively studied, and by adopting a heat-shielding aggregate in which a heat-reflecting pigment is adhered to the surface of the aggregate, the amount of the heat-shielding aggregate is greatly increased. Even when the coating material is configured, it is possible to conceal the color of the aggregate and finish it in black or dark color, and the heat-reflecting pigment attached to the surface of the heat-shielding aggregate is sufficiently close. It has been found that it can exhibit a desired heat shielding effect by exhibiting an infrared reflecting action.

即ち、本発明は、骨材の表面に熱反射顔料が付着してなる遮熱骨材を含有することを特徴とする遮熱性塗材を提供する。   That is, the present invention provides a heat-shielding coating material characterized by containing a heat-shielding aggregate obtained by attaching a heat-reflecting pigment to the surface of the aggregate.

また、好ましくは、前記遮熱骨材の表面に、クリアコーティング層が形成されたことを特徴とする前記遮熱性塗材を提供する。   Preferably, the thermal barrier coating material is characterized in that a clear coating layer is formed on the surface of the thermal barrier aggregate.

さらに、本発明は、基材上に、前記遮熱性塗材が塗布されてなることを特徴とする遮熱材を提供する。   Furthermore, the present invention provides a heat shielding material, wherein the heat shielding coating material is applied on a substrate.

本発明に係る遮熱性塗材によれば、骨材の表面に熱反射顔料が付着してなる遮熱骨材を用いることにより、骨材そのものが熱反射顔料の色に着色されることとなる。よって、例えば、前記従来技術に記載されたような可視光線を吸収しつつ近赤外線を反射する顔料を熱反射顔料として骨材表面に塗布すれば、該骨材自体が黒色又はそれに近い濃彩色を呈するものとなる。従って、該骨材の含有量を大幅に増加させて塗材を構成した場合であっても、作製された塗材は黒色又はそれに近い濃彩色を呈しうるものとなる。言い換えると、同程度の濃彩色に仕上げるために必要となる骨材量を大幅に減らすことが可能となる。   According to the heat-shielding coating material according to the present invention, the aggregate itself is colored in the color of the heat-reflecting pigment by using the heat-shielding aggregate in which the heat-reflecting pigment adheres to the surface of the aggregate. . Thus, for example, if a pigment that absorbs visible light and reflects near-infrared rays as described in the above-mentioned prior art is applied to the aggregate surface as a heat-reflecting pigment, the aggregate itself has a black color or a dark color close to it. It will be presented. Therefore, even when the coating material is configured by greatly increasing the content of the aggregate, the prepared coating material can exhibit black or a dark color close thereto. In other words, it is possible to significantly reduce the amount of aggregate required to finish the same deep color.

また、上記のような遮熱骨材を用いることにより、塗装面に露出した骨材の表面においては熱反射顔料に近赤外線反射作用を発揮させることができるため、該遮熱性塗材は、優れた遮熱効果を奏するものとなる。   In addition, by using the heat insulating aggregate as described above, the heat reflecting pigment can exert a near-infrared reflecting action on the surface of the aggregate exposed on the painted surface, so that the heat insulating coating material is excellent. The heat shielding effect is exhibited.

さらに、本発明の遮熱性塗材を塗布してなる遮熱材は、前記従来技術の如き塗料を塗布してなる遮熱材と比べて骨材を多量に含有するために途膜の厚みが厚く、しかも、該途膜を構成する骨材と骨材の間には、細かな隙間や気泡が含まれた構成となるため、従来の熱反射塗料と比べて断熱効果が格段に優れたものとなる。   Furthermore, since the heat shielding material formed by applying the heat shielding coating material of the present invention contains a larger amount of aggregate than the heat shielding material obtained by applying the coating material as in the prior art, the thickness of the film is small. Thick, and because it has a structure containing fine gaps and bubbles between the aggregates constituting the membrane, the heat insulation effect is much better than conventional heat reflective paints It becomes.

このように、本発明によれば、遮熱性と断熱性とを併せ持つ優れた壁材、屋根材、舗装材等の遮熱材と、これを構成するための遮熱性塗材を提供することが可能となり、黒色又はそれに近い濃彩色に仕上げる場合であっても同様の効果を奏するものとなる。   Thus, according to the present invention, it is possible to provide an excellent wall insulating material having both heat insulating properties and heat insulating properties, such as a wall material, a roof material, and a paving material, and a heat insulating coating material for constituting the same. This is possible, and the same effect can be obtained even when the color is finished in black or a dark color close thereto.

以下、本発明の実施形態について説明する。   Hereinafter, embodiments of the present invention will be described.

本発明において用いる熱反射顔料としては、紫外線および可視光線に対する吸収率が高く、近赤外線に対する反射率が高い顔料を好適に使用できる。中でも、JIS A 5759に規定された日射反射率が12%以上、好ましくは15%以上であり、CIE1976L***色空間におけるL*値が20以下、好ましくは24以下の顔料であるものを特に好適に使用できる。 As the heat reflecting pigment used in the present invention, a pigment having a high absorption rate for ultraviolet rays and visible rays and a high reflectance for near infrared rays can be suitably used. Ones among them, JIS A 5759 to a defined solar reflectance of 12% or more, preferably more than 15%, CIE1976L * a * b * L * value in the color space is 20 or less, preferably 24 or less of the pigment Can be used particularly preferably.

このような条件を満たす顔料としては、アゾ系、フタリシアニン系、金属錯体型系、ペリレン系、インジオ系等の有機顔料、酸化チタン系、酸化鉄系、複合酸化物系等の無機顔料などのうち、上記特性を有するものが挙げられる。
市販品としては、例えば、商品名「MHIブラック」(御国色素社製)や、商品名「クロモファインブラックA−1103」(大日精化工業社製)などが使用できる。
また、これらの顔料を分散剤中に均一に分散させてなるペースト状の顔料を使用することも可能であり、これによって骨材表面への着色状態をより一層均一化させることができる。さらに、耐候性に優れるという観点では、無機系の顔料が好適に使用できる。
Examples of pigments satisfying such conditions include organic pigments such as azo-based, phthalicyanine-based, metal complex-based, perylene-based, and indio-based pigments, and inorganic pigments such as titanium oxide-based, iron oxide-based, and complex oxide-based pigments. Among them, those having the above characteristics can be mentioned.
As a commercially available product, for example, trade name “MHI Black” (manufactured by Mikuni Dye Co., Ltd.), trade name “Chromo Fine Black A-1103” (manufactured by Dainichi Seika Kogyo Co., Ltd.) and the like can be used.
Moreover, it is also possible to use a paste-like pigment in which these pigments are uniformly dispersed in a dispersant, and this makes it possible to make the colored state on the aggregate surface even more uniform. Furthermore, inorganic pigments can be suitably used from the viewpoint of excellent weather resistance.

斯かる熱反射顔料を骨材表面に付着させる方法としては、特に限定されず、任意の方法を採用しうるが、例えば、樹脂中に該熱反射顔料を分散させて熱反射顔料分散樹脂を調製し、該熱反射顔料分散樹脂と骨材とを混合する方法が好適である。
この方法においては、下記式によって求められる顔料の総体積比率(ピグメントボリュームコンテント、以下、「PVC」という)が、20〜30(%)となる割合で熱反射顔料分散樹脂を調製することが好ましい。

PVC={顔料体積/(樹脂体積+顔料体積)}×100
The method for attaching such a heat reflecting pigment to the aggregate surface is not particularly limited, and any method can be adopted. For example, the heat reflecting pigment is dispersed in a resin to prepare a heat reflecting pigment dispersed resin. A method of mixing the heat-reflecting pigment-dispersed resin and the aggregate is preferable.
In this method, it is preferable to prepare the heat-reflecting pigment-dispersed resin in such a ratio that the total volume ratio of the pigment obtained by the following formula (pigment volume content, hereinafter referred to as “PVC”) is 20 to 30 (%). .

PVC = {pigment volume / (resin volume + pigment volume)} × 100

上記のようなPVCの範囲で熱反射顔料分散樹脂を調製し、これを骨材と混合することにより、骨材表面が熱反射顔料によって均一に着色されて骨材自体の色が隠蔽されやすくなり、しかも色落ちし難いという効果がある。   By preparing a heat-reflecting pigment-dispersed resin in the PVC range as described above and mixing it with the aggregate, the aggregate surface is uniformly colored with the heat-reflecting pigment, and the color of the aggregate itself is easily concealed. In addition, there is an effect that it is difficult to discolor.

また、本発明において用いる骨材としては、各種公知の塗材用の骨材を使用することができ、具体例としては、花崗岩や玄武岩等の天然珪石、コランダム(鋼玉)、砂岩、火山石軽石、ガラス等の粉砕物が挙げられる。   In addition, as the aggregate used in the present invention, various known aggregates for coating materials can be used. Specific examples include natural quartzite such as granite and basalt, corundum (steel ball), sandstone, and volcanic stone pumice. And pulverized materials such as glass.

また、該骨材の平均粒径は、0.1〜5mmが好適である。平均粒径が0.1以上であることにより、前記熱反射顔料と比べて十分に粒径が大きくなり、熱反射顔料による骨材表面の着色を安定させることができ、しかも樹脂と混合して基材上へ塗布する際に骨材同士がほぐれ易く、塊が生じ難いという効果がある。また、平均粒径が0.5mm以下であることにより、骨材表面形状に起因する濃淡が生じ難く色相制御が容易となり、塗布する際に用いる吹付け用機器の吐出口の閉塞をも防止できる。   Moreover, 0.1-5 mm is suitable for the average particle diameter of this aggregate. When the average particle size is 0.1 or more, the particle size is sufficiently larger than that of the heat reflecting pigment, the coloring of the aggregate surface by the heat reflecting pigment can be stabilized, and the resin can be mixed with the resin. There is an effect that the aggregates are easily loosened when applied onto the base material, and lumps are hardly formed. In addition, when the average particle size is 0.5 mm or less, shading caused by the aggregate surface shape is less likely to occur, hue control is facilitated, and blockage of the discharge port of the spraying device used during application can be prevented. .

骨材の表面に熱反射顔料を塗布した後には、さらに、その上から無色透明樹脂によってクリアコーティング層を形成することが好ましい。無色透明樹脂としては、アクリル系共重合樹脂やウレタン樹脂、エポキシ樹脂、或いはこれらの樹脂のシリコン変性型を使用することができる。これらの無色透明樹脂は、骨材表面への付着強度が高く強靭な被膜を形成することができ、しかも耐候性にも優れたものであるため、骨材表面からの耐候性顔料の脱落を防止することができる。よって、熱反射顔料の上からこのようなクリアコーティング層を形成することにより、機械せん断や骨材同士の衝突による磨耗に強くなり、高速攪拌機を使用して塗材を混練することが可能となる。   After applying the heat reflecting pigment on the surface of the aggregate, it is preferable to further form a clear coating layer from the transparent transparent resin. As the colorless transparent resin, acrylic copolymer resin, urethane resin, epoxy resin, or silicon-modified type of these resins can be used. These colorless and transparent resins have a high adhesion strength to the aggregate surface, can form a tough film, and are also excellent in weather resistance, preventing the weather-resistant pigment from falling off the aggregate surface. can do. Therefore, by forming such a clear coating layer on the heat-reflecting pigment, it becomes resistant to abrasion due to mechanical shearing or collision between aggregates, and it becomes possible to knead the coating material using a high-speed stirrer. .

該無色透明樹脂としては、溶媒が蒸発した後に皮膜化する1液タイプのものや、硬化剤と混合して使用することにより反応硬化する2液タイプのもの等を使用できる。2液タイプのものとしては、アクリルポリオールにポリイソシアネートを硬化剤として混合するアクリルウレタン系樹脂、エポキシ樹脂にポリアミンやポリアミドを配合したものなどが好適である。   As the colorless and transparent resin, a one-component type that forms a film after the solvent evaporates, or a two-component type that reacts and cures when mixed with a curing agent can be used. As the two-component type, an acrylic urethane resin in which polyisocyanate is mixed with acrylic polyol as a curing agent, and an epoxy resin blended with polyamine or polyamide are suitable.

また、前記熱反射顔料による作用を妨げない範囲内であれば、該骨材表面を任意の色相に着色することも可能である。着色に用いる着色顔料としては、従来公知のものを用いることができ、例えば、アゾ系顔料、フタロシアニン系顔料、金属錯塩型顔料、トリフェニルメタン系顔料等の有機顔料や、亜鉛華、、鉛白、リトポン、カーボンブラック、鉛丹、べんがら、黄鉛(クロムイエロー)、群青(ウルトラマリン)、紺青、亜鉛黄(ジンククロメート)、沈降性硫酸バリウム、バライト粉、二酸化チタン等の無機顔料などを使用することができる。特に、耐候性に優れるという観点から、無機顔料が好適に使用できる。   In addition, the aggregate surface can be colored to an arbitrary hue as long as it does not interfere with the action of the heat reflecting pigment. As the coloring pigments used for coloring, conventionally known pigments can be used, for example, organic pigments such as azo pigments, phthalocyanine pigments, metal complex pigments, triphenylmethane pigments, zinc white, lead white , Lithopone, carbon black, red lead, bengara, yellow lead (chrome yellow), ultramarine, ultramarine, bituminous, zinc yellow (zinc chromate), precipitated barium sulfate, barite powder, titanium dioxide and other inorganic pigments can do. In particular, inorganic pigments can be suitably used from the viewpoint of excellent weather resistance.

着色顔料は、前記熱反射顔料の塗布に先立って塗布し、無色透明樹脂によるクリアコーティング層を形成してもよいし、前記熱反射顔料と同時に塗布し、無色透明樹脂によるクリアコーティング層を形成してもよい。   The colored pigment may be applied prior to the application of the heat reflecting pigment to form a clear coating layer made of a colorless transparent resin, or may be applied simultaneously with the heat reflecting pigment to form a clear coating layer made of a colorless transparent resin. May be.

本発明に係る遮熱性塗材を構成するバインダー樹脂としては、塗布対象となる基材上に、前記遮熱骨材を含む途膜を形成しうるものであれば特に限定されず、種々の樹脂材料を使用することができる。該バインダー樹脂としては、アクリル樹脂系、ウレタン樹脂系、又はこれらの樹脂のシリコン変性型が好適であり、水系又は溶剤系のいずれのタイプでも使用することができる。   The binder resin constituting the heat-shielding coating material according to the present invention is not particularly limited as long as it can form a film containing the heat-shielding aggregate on the base material to be coated, and various resins. Material can be used. As the binder resin, an acrylic resin type, a urethane resin type, or a silicon-modified type of these resins is preferable, and any of a water type and a solvent type can be used.

本発明に係る遮熱性塗材は、前記遮熱骨材100重量部に対し、該バインダー樹脂の固形分を好ましくは20〜50重量部、より好ましくは30〜40重量部含有して構成される。   The heat-shielding coating material according to the present invention preferably contains 20 to 50 parts by weight, more preferably 30 to 40 parts by weight of the solid content of the binder resin with respect to 100 parts by weight of the heat-shielding aggregate. .

さらに、本発明に係る遮熱材は、基材上に上記のような遮熱性塗材が塗布されてなるものである。基材としては、各種建材や土木材料等を使用することができ、製造された遮熱材は、家屋や工場等の屋根材、壁材、又は床材、或いは、道路や歩道を構成する舗装材などとして使用することができる。   Furthermore, the heat shielding material according to the present invention is obtained by applying the above-described heat shielding coating material on a substrate. As the base material, various building materials and civil engineering materials can be used, and the manufactured heat shielding material is a roof material, a wall material or a floor material of a house or a factory, or a pavement constituting a road or a sidewalk. It can be used as a material.

遮熱性塗材の厚みは、各種用途に応じて任意に設定できるが、例えば、屋根材として用いる場合には、概ね0.1〜0.6mm、好ましくは0.1〜0.3mmとし、舗装材として用いる場合には、概ね0.5〜5mm、好ましくは1〜5mmとする。
屋根材として用いる場合に該遮熱性塗材の厚みを上記範囲とすることにより、前記遮熱骨材による遮熱効果に加えて断熱性にも優れたものとなり、建物の内部温度を大幅に低下させることができる。また、骨材を用いた塗材は、塗料とは異なる優れた質感を有するものであるため、屋根の意匠性向上にも寄与しうるものとなる。
The thickness of the heat-shielding coating material can be arbitrarily set according to various uses. For example, when used as a roofing material, the thickness is generally 0.1 to 0.6 mm, preferably 0.1 to 0.3 mm. When used as a material, the thickness is approximately 0.5 to 5 mm, preferably 1 to 5 mm.
When used as a roofing material, by making the thickness of the thermal barrier coating material within the above range, in addition to the thermal barrier effect by the thermal barrier aggregate, the thermal insulation will be excellent, and the internal temperature of the building will be greatly reduced. Can be made. Moreover, since the coating material using an aggregate has the outstanding texture different from a coating material, it can also contribute to the design improvement of a roof.

遮熱性塗材を基材上に塗布する方法としては、吹き付けによる施工や、コテによる施工が可能である。   As a method of applying the heat-shielding coating material on the substrate, it is possible to perform construction by spraying or construction by a trowel.

以下、本発明の遮熱性塗材および遮熱材について、実施例および比較例を挙げて更に詳細に説明する。   Hereinafter, the thermal barrier coating material and the thermal barrier material of the present invention will be described in more detail with reference to Examples and Comparative Examples.

(遮熱骨材の製造例1)
熱反射顔料分散樹脂の調製
アクリルポリオール樹脂(住友バイエルウレタン社製、デスモフェンA365)1000重量部と、熱反射顔料として複合酸化物系無機顔料(御国色素社製、MHIブラック)109.1重量部と、エステルエーテル系の溶剤であるプロピレングリコール59.3重量部とを高速で攪拌混合し、熱反射顔料分散樹脂を調製した。
尚、顔料の真比重が1.8、樹脂の真比重が1.1であるため、本製造例のPVCは、10(%)であった。
(Production example 1 of heat shield aggregate)
Preparation of heat reflecting pigment dispersion resin 1000 parts by weight of acrylic polyol resin (manufactured by Sumitomo Bayer Urethane Co., Ltd., Desmophen A365) and 109.1 parts by weight of complex oxide inorganic pigment (manufactured by Mikuni Dye Co., Ltd., MHI Black) as heat reflecting pigments Then, 59.3 parts by weight of propylene glycol, which is an ester ether solvent, was stirred and mixed at a high speed to prepare a heat reflecting pigment dispersion resin.
Since the true specific gravity of the pigment was 1.8 and the true specific gravity of the resin was 1.1, the PVC of this production example was 10 (%).

遮熱骨材の作製
次いで、骨材として淡路硅砂(山川産業社製、A−4号)1000重量部と、前記熱反射顔料分散樹脂6.2重量部と、硬化剤であるポリイソシアネート(住友バイエルウレタン社製、スミジュールN3300)6.3重量部と、シランカップリング材(東芝シリコン社製、TSL−8350)0.1重量部と、有機スズ系触媒(三共有機合成社製、SCAT−1)0.01重量部とをモルタルミキサーで攪拌混合し、その後、乾燥させることにより、遮熱骨材を作製した。
Production of heat shield aggregate Next, 1000 parts by weight of Awaji cinnabar (manufactured by Yamakawa Sangyo Co., Ltd., A-4) as an aggregate, 6.2 parts by weight of the heat reflecting pigment dispersion resin, and polyisocyanate (Sumitomo) 6.3 parts by weight of Bayer Urethane Co., Ltd., Sumidur N3300), 0.1 part by weight of silane coupling material (Toshiba Silicone, TSL-8350), and organotin catalyst (manufactured by Sankyo Gosei Co., Ltd., SCAT) -1) A thermal barrier aggregate was produced by stirring and mixing 0.01 parts by weight with a mortar mixer and then drying.

(遮熱骨材の製造例2)
PVCを20(%)とすべく、熱反射顔料を245.5重量部として熱反射顔料分散樹脂を調製すること、そして該熱反射顔料分散樹脂を7.9重量部使用することを除き、他は製造例1と同様にして遮熱骨材を作製した。
(Production example 2 of heat shield aggregate)
Except for preparing 20% by weight of the heat reflecting pigment with 245.5 parts by weight of the heat reflecting pigment so that the PVC is 20%, and using 7.9 parts by weight of the heat reflecting pigment dispersing resin. Produced a heat shield aggregate in the same manner as in Production Example 1.

(遮熱骨材の製造例3)
PVCを30(%)とすべく、熱反射顔料を420.8重量部として熱反射顔料分散樹脂を調製すること、そして該熱反射顔料分散樹脂を10.2重量部使用することを除き、他は製造例1と同様にして遮熱骨材を作製した。
(Production example 3 of heat shield aggregate)
Except that the heat reflecting pigment dispersion resin is prepared with 420.8 parts by weight of the heat reflecting pigment so that the PVC is 30%, and 10.2 parts by weight of the heat reflecting pigment dispersion resin is used. Produced a heat shield aggregate in the same manner as in Production Example 1.

(遮熱骨材の製造例4)
PVCを40(%)とすべく、熱反射顔料を654.5重量部として熱反射顔料分散樹脂を調製すること、そして該熱反射顔料分散樹脂を13.2重量部使用することを除き、他は製造例1と同様にして遮熱骨材を作製した。
(Production example 4 of heat shield aggregate)
Except for preparing a heat-reflective pigment dispersion resin with 654.5 parts by weight of the heat-reflective pigment to make PVC 40%, and using 13.2 parts by weight of the heat-reflective pigment dispersion resin, etc. Produced a heat shield aggregate in the same manner as in Production Example 1.

製造例1〜4の遮熱骨材に関し、熱反射顔料分散樹脂の原料配合、及び遮熱骨材の原料配合1を、それぞれ下記表1および表2に示す。

Figure 2007217586
Regarding the heat shield aggregates of Production Examples 1 to 4, the raw material composition of the heat reflecting pigment-dispersed resin and the raw material composition 1 of the heat shield aggregate are shown in Table 1 and Table 2 below, respectively.
Figure 2007217586

Figure 2007217586
Figure 2007217586

製造例1〜4の遮熱骨材を観察したところ、製造例1では熱反射顔料が骨材表面を完全に被覆しておらず、骨材表面が一部露出していることが認められた。これに対し、製造例2〜4では熱反射顔料いよって骨材表面が完全に被覆されており、骨材そのものの色が完全に隠蔽された状態で着色されていることが確認できた。ただし、製造例4では、骨材表面に熱反射顔料が多層に付着し、高速攪拌時に上層の顔料が剥がれ落ちる傾向にあることがわかった。   When the heat-shielding aggregates of Production Examples 1 to 4 were observed, it was found that in Production Example 1, the heat-reflecting pigment did not completely cover the aggregate surface, and the aggregate surface was partially exposed. . In contrast, in Production Examples 2 to 4, it was confirmed that the aggregate surface was completely covered with the heat reflecting pigment, and the aggregate itself was colored in a completely hidden state. However, in Production Example 4, it was found that the heat reflecting pigment adhered to the aggregate surface in multiple layers, and the upper layer pigment tends to peel off during high-speed stirring.

(遮熱性塗材の実施例)
前記製造例2の遮熱骨材100重量部と、アクリル系樹脂エマルション(山本窯業化工(株)製、「セラグラニー結合材」)30重量部とを高速攪拌機で攪拌混合し、実施例の遮熱性塗材を調製した。
(Example of thermal barrier coating material)
100 parts by weight of the heat-shielding aggregate of Production Example 2 and 30 parts by weight of an acrylic resin emulsion (manufactured by Yamamoto Ceramics Co., Ltd., “Seragranny Binder”) are stirred and mixed with a high-speed stirrer, and the heat-shielding properties of Examples A coating material was prepared.

(一般的な塗材による比較例)
遮熱性顔料に代えてカーボンブラックを用いることを除き、他は前記製造例2と同様にして着色骨材を調製し、該着色骨材100重量部と、アクリル系樹脂エマルション(同上)とを高速攪拌機で攪拌混合し、比較例としての一般的な塗材を調製した。
(Comparative example using common coating materials)
A colored aggregate was prepared in the same manner as in Production Example 2 except that carbon black was used instead of the heat-shielding pigment, and 100 parts by weight of the colored aggregate and an acrylic resin emulsion (same as above) were mixed at high speed. The mixture was stirred and mixed with a stirrer to prepare a general coating material as a comparative example.

熱反射率の測定
溶剤系ウレタンシーラーを塗装したアルミニウム板に、実施例および比較例の塗材を2mmの厚みで鏝塗りした後、7日間自然乾燥させて試験体を作製し、分光光度計(日立製作所製、U−3500)を用いてJIS R 3106に規定された日射反射率を測定した。
Measurement of thermal reflectance After coating the coating materials of Examples and Comparative Examples with a thickness of 2 mm on an aluminum plate coated with a solvent-based urethane sealer, the specimen was naturally dried for 7 days to prepare a test specimen. The solar reflectance defined in JIS R 3106 was measured using Hitachi, U-3500).

白熱灯ランプ照射による温度測定
同様の試験体を用い、該試験体の塗材面より150mmの距離から東芝レフランプ95Wで20分間照射し、該塗材面の温度が一定となった際の温度(白熱灯ランプ照射温度)を測定した。
結果を下記表3に示す。
Using a test specimen similar to the temperature measurement by incandescent lamp irradiation, irradiated with a Toshiba reflex lamp 95W for 20 minutes from a distance of 150 mm from the coating surface of the test specimen, the temperature at which the temperature of the coating surface became constant ( Incandescent lamp irradiation temperature) was measured.
The results are shown in Table 3 below.

Figure 2007217586
Figure 2007217586

表3に示したように、本発明の実施例においては熱反射率が大きく、白熱灯ランプを照射した際の温度上昇も低く抑えられることが確認できた。   As shown in Table 3, it was confirmed that in the examples of the present invention, the heat reflectance was large and the temperature rise when the incandescent lamp was irradiated was suppressed to a low level.

Claims (3)

骨材の表面に熱反射顔料が付着してなる遮熱骨材を含有することを特徴とする遮熱性塗材。   A heat-shielding coating material comprising a heat-shielding aggregate formed by attaching a heat-reflecting pigment to the surface of an aggregate. 前記遮熱骨材の表面に、クリアコーティング層が形成されたことを特徴とする請求項1記載の遮熱性塗材。   The heat insulating coating material according to claim 1, wherein a clear coating layer is formed on a surface of the heat insulating aggregate. 基材上に、請求項1又は2に記載の遮熱性塗材が塗布されてなることを特徴とする遮熱材。   A heat-shielding material obtained by applying the heat-shielding coating material according to claim 1 or 2 on a substrate.
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