JPH0726166A - Aqueous heat-resistant paint and heat-resistant coating layer - Google Patents
Aqueous heat-resistant paint and heat-resistant coating layerInfo
- Publication number
- JPH0726166A JPH0726166A JP19684293A JP19684293A JPH0726166A JP H0726166 A JPH0726166 A JP H0726166A JP 19684293 A JP19684293 A JP 19684293A JP 19684293 A JP19684293 A JP 19684293A JP H0726166 A JPH0726166 A JP H0726166A
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- Prior art keywords
- weight
- heat
- water
- coating layer
- resistant coating
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、水性耐熱塗料および耐
熱被覆層に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aqueous heat resistant paint and a heat resistant coating layer.
【０００２】[0002]
【従来の技術】従来、高温、耐熱、ガス等による金属腐
食を防ぐための塗料やコーティング材としては、塗布し
た後に加熱焼成して耐熱被覆層を形成するものの他は、
特に知られていなかった。このように加熱焼成して耐熱
被覆層を形成する場合には、耐熱塗料を塗布し、一旦こ
れを十分に乾燥硬化させ、その後、加熱して焼成させる
といった手順が採られる。2. Description of the Related Art Conventionally, as paints and coating materials for preventing metal corrosion due to high temperature, heat resistance, gas, etc., other than those which form a heat resistant coating layer by heating and baking after coating,
Not particularly known. When the heat-resistant coating layer is formed by heating and baking as described above, a procedure of applying a heat-resistant coating, once sufficiently drying and curing it, and then heating and baking it is adopted.
【０００３】この方法では、塗料を塗布した後、塗布さ
れた塗料が十分に乾燥硬化するまでに、数日かかるた
め、迅速に耐熱被覆層を形成できないといった欠点があ
った。また、乾燥硬化した後に塗膜を加熱して焼成させ
るといった工程があり、耐熱被覆層の形成に熱エネルギ
ーが必要とされ、耐熱被覆層の形成に必要なコストも高
いものとなっている。This method has a drawback in that the heat-resistant coating layer cannot be rapidly formed because it takes several days after the coating material is applied until the coating material is sufficiently dried and cured. In addition, there is a step of heating and baking the coating film after drying and curing, which requires heat energy to form the heat resistant coating layer, and the cost required to form the heat resistant coating layer is also high.
【０００４】また、上記乾燥硬化が十分に行われないま
ま、焼成のための加熱を行うと、塗膜にヒビが入った
り、また部分的に塗膜が剥れたりするといった問題があ
る。このため、耐熱塗料塗布後の乾燥硬化のための工程
は必須なものとされており、この工程を省略することは
できなかった。Further, if the heating for firing is carried out while the above-mentioned dry curing is not sufficiently carried out, there is a problem that the coating film is cracked or partially peeled off. For this reason, the step for drying and curing after applying the heat-resistant paint is indispensable, and this step cannot be omitted.
【０００５】また、上記従来の耐熱被覆層は、絶縁層と
しての機能も有しているが、加熱して焼成した後には十
分な絶縁効果を発揮し得るが、焼成以前では、１０Ｖ〜
１２Ｖ程度以上の印加電圧に対しては、絶縁効果が得ら
れないといった欠点があった。Further, although the conventional heat-resistant coating layer also has a function as an insulating layer, it can exhibit a sufficient insulating effect after being heated and fired, but before firing, it should be in the range of 10V-
There is a drawback that an insulating effect cannot be obtained for an applied voltage of about 12 V or more.
【０００６】[0006]
【発明が解決しようとする課題】本発明の目的は、乾燥
硬化のために要する時間を短縮し、かつ焼成工程を省略
することによって、耐熱被覆層の形成時間の短縮とコス
ト低減を可能とする水性耐熱塗料および耐熱被覆層を提
供することにある。SUMMARY OF THE INVENTION An object of the present invention is to shorten the time required for dry curing and to omit the firing step, thereby making it possible to shorten the time for forming the heat resistant coating layer and reduce the cost. It is to provide a water-based heat-resistant paint and a heat-resistant coating layer.
【０００７】[0007]
【課題を解決するための手段】このような目的を達成す
る耐熱塗料は、少なくとも、アルカリ金属ケイ酸塩を１
５〜３０重量％程度、二酸化ケイ素粉末を５〜３０重量
％程度含有する水溶液である。前記アルカリ金属ケイ酸
塩は、例えばケイ酸リチウムおよびケイ酸ナトリウムな
どが挙げられる。ケイ酸ナトリウム水溶液は、水ガラス
それ自体、または、水ガラスにさらに水を混入すること
によって得ることができる。A heat-resistant coating material that achieves such an object contains at least an alkali metal silicate.
It is an aqueous solution containing about 5 to 30% by weight and about 5 to 30% by weight of silicon dioxide powder. Examples of the alkali metal silicate include lithium silicate and sodium silicate. The aqueous solution of sodium silicate can be obtained by adding water to the water glass itself or water glass.
【０００８】また二酸化ケイ素（ＳｉＯ2 ）は、例えば
単体の粉末状のものを上記ケイ酸ナトリウム水溶液に混
合することにより含有される。また、前記単体の場合に
限らず、ＳｉＯ2 を含有する粘土などの自然鉱石（例え
ばカオリンなど）等をそのまま混合してもよく、さらに
は、前記自然鉱石粉末にＳｉＯ2 の単体粉末を混ぜて、
上記ケイ酸ナトリウム水溶液に混合してもよい。Further, silicon dioxide (SiO 2 ) is contained, for example, by mixing a powdery substance of a simple substance with the aqueous solution of sodium silicate. Further, not only in the case of the simple substance, but also natural ores such as clay containing SiO 2 (for example, kaolin etc.) may be mixed as they are, and further, a simple powder of SiO 2 is mixed with the natural ore powder. ,
You may mix with the said sodium silicate aqueous solution.
【０００９】上記水性耐熱塗料の製造方法について説明
すると、水ガラスを水でさらに薄めてアルカリ金属ケイ
酸塩が２５〜３５重量％程度含有されている水溶液を作
り、この水溶液に、該水溶液中に含有されている前記ア
ルカリ金属ケイ酸塩に対して１７０〜２１０重量％程度
の二酸化ケイ素粉末を混入して撹拌し、本発明の耐熱塗
料を得る。さらに、後述する無機質系充填剤を混入する
こともできる。Explaining the method for producing the above water-based heat-resistant paint, water glass is further diluted with water to prepare an aqueous solution containing about 25 to 35% by weight of an alkali metal silicate, and this aqueous solution is added to the aqueous solution. About 170 to 210% by weight of silicon dioxide powder is mixed with the contained alkali metal silicate and stirred to obtain the heat-resistant paint of the present invention. Furthermore, an inorganic filler described later can be mixed.
【００１０】上記水ガラスの、モル組成は、Ｒ・nＳｉＯ
2 （Ｒはアルカリ金属の酸化物：ex. Ｌｉ2 Ｏ、Ｎａ2
Ｏ）でケイソウ比(n) は、n ＝１．９〜４程度であり、
好ましくは２〜３程度であり、より好ましくは２〜２．
３程度である。ケイソウ比が前記範囲外であると、水ガ
ラスを構成せず、Ｎa2Ｏの割合が大きいと水溶性が増大
するので、前記２〜３程度の範囲、特に２〜２．３程度
の範囲が好ましい。The water glass has a molar composition of R.nSiO
2 (R is an alkali metal oxide: ex. Li 2 O, Na 2
O), the diatom ratio (n) is about n = 1.9 to 4,
It is preferably about 2 to 3, more preferably 2 to 2.
It is about 3. If the diatom ratio is out of the above range, water glass is not formed, and if the ratio of Na 2 O is large, the water solubility increases. Therefore, the above range of about 2 to 3, particularly about 2 to 2.3 is preferable. preferable.
【００１１】また、水ガラスの成分は、ＳｉＯ2 が２３
〜３９重量％程度、アルカリ金属酸化物（例えば、Ｎａ
2 Ｏ）が６〜２０重量％程度、Ｆｅ2 Ｏ3 が０．０２〜
０．０５重量％程度以下、不溶物が０．２重量％程度以
下であり、好ましくはＳｉＯ2 は３５〜３８重量％程
度、アルカリ金属酸化物は１７〜１９重量％程度である
とよい。Ｆｅ2 Ｏ3 と不溶物は含有されていても、含有
されていなくてもよい。The component of water glass is SiO 2 of 23
~ 39 wt%, alkali metal oxides (for example, Na
2 O) is about 6 to 20 wt% and Fe 2 O 3 is 0.02 to
It is about 0.05% by weight or less, insoluble matter is about 0.2% by weight or less, preferably SiO 2 is about 35 to 38% by weight, and alkali metal oxide is about 17 to 19% by weight. Fe 2 O 3 and the insoluble matter may or may not be contained.
【００１２】本発明の水性耐熱塗料は、上記二酸化ケイ
素の他に、粉状の無機質系充填剤を含有させてもよい。
この無機質系充填剤としては、既述のカオリンの他、例
えば、ゼオライト、セリサイト、クレ、ジルコニア、炭
化ケイ素、マグネシウム、酸化マグネシウム、チタン、
酸化チタン、アルミニウム、酸化アルミニウム、ニッケ
ル、黒鉛、ガラス繊維、セラミック粉末、セラミック繊
維、ウイスカからなる群より選ばれた１種または２種以
上を混合したものが挙げられる。前記無機質系充填剤に
は、粉状体のものと繊維状のものとが含まれる。The water-based heat-resistant paint of the present invention may contain a powdery inorganic filler in addition to the above silicon dioxide.
As the inorganic filler, other than the above-mentioned kaolin, for example, zeolite, sericite, clay, zirconia, silicon carbide, magnesium, magnesium oxide, titanium,
Examples thereof include one or a mixture of two or more selected from the group consisting of titanium oxide, aluminum, aluminum oxide, nickel, graphite, glass fiber, ceramic powder, ceramic fiber and whiskers. The inorganic fillers include powdery ones and fibrous ones.
【００１３】上記無機質系充填剤の内、カオリンの組成
は種々のものが挙げられるが、例えば次のような組成の
ものを用いることができる。すなわち、ＳｉＯ2 ６５〜
７５重量％程度、Ａl2Ｏ3 ２５〜３５重量％程度、Ｆｅ
2 Ｏ3 ０．１〜０．２重量％程度を含有しているカオリ
ンである。カオリンの組成要素としては、上記の他Ｔｉ
Ｏ2 、ＣａＯ、ＭｇＯ、Ｋ2 Ｏ、Ｎa2Ｏなどが挙げら
れ、これらを含有するカオリンを用いてもよい。Among the above-mentioned inorganic fillers, there are various kaolin compositions, and for example, the following compositions can be used. That is, SiO 2 65-
About 75% by weight, Al 2 O 3 about 25 to 35% by weight, Fe
Kaolin containing about 0.1 to 0.2% by weight of 2 O 3 . As the composition element of kaolin, other than the above, Ti
Examples thereof include O 2 , CaO, MgO, K 2 O and Na 2 O, and kaolin containing these may be used.
【００１４】上記組成のカオリンを含有する本発明の水
性耐熱塗料の組成の一例を挙げると、ケイ酸ナトリウム
７〜２０重量％程度、カオリン２５〜４０重量％程度、
水１５〜４０重量％程度を含有する水性耐熱塗料を構成
することができ、さらにこれに５重量％程度以下のグラ
スパウダーを混入させることもできる。グラスパウダー
を混入させることによって、加熱焼成後の耐熱被覆層の
剥離強度や耐摩耗性が向上する。As an example of the composition of the water-based heat-resistant paint of the present invention containing kaolin having the above composition, about 7 to 20% by weight of sodium silicate, about 25 to 40% by weight of kaolin,
A water-based heat-resistant paint containing about 15 to 40% by weight of water can be formed, and further, about 5% by weight or less of glass powder can be mixed therein. By mixing the glass powder, the peel strength and abrasion resistance of the heat resistant coating layer after heating and baking are improved.
【００１５】本発明の水性耐熱塗料に、さらに異なる混
合物を混入させて構成した場合の組成成分の例を挙げる
と、ケイ酸ナトリウム、カオリン、二酸化ケイ素、酸化
アルミニウム、酸化チタン、グラスパウダー、シリコー
ン、水である。Examples of the composition components in the case where the water-resistant heat-resistant paint of the present invention is further mixed with a different mixture are as follows: sodium silicate, kaolin, silicon dioxide, aluminum oxide, titanium oxide, glass powder, silicone, It is water.
【００１６】それぞれの含有量について、以下にその例
を挙げる。ケイ酸ナトリウムの含有量は、５〜１８重量
％程度、好ましくは７〜１５重量％程度、さらに好まし
くは８〜１１．９重量％程度、特に９〜１１．９重量％
程度とするのが望ましい。Examples of the respective contents are given below. The content of sodium silicate is about 5 to 18% by weight, preferably about 7 to 15% by weight, more preferably about 8 to 11.9% by weight, especially 9 to 11.9% by weight.
It is desirable to set the degree.
【００１７】カオリンの含有量は、１０〜２０重量％程
度、好ましくは１２〜１９重量％程度、さらに好ましく
は１５〜１７重量％程度である。The content of kaolin is about 10 to 20% by weight, preferably about 12 to 19% by weight, more preferably about 15 to 17% by weight.
【００１８】二酸化ケイ素の含有量は、５〜１５重量％
程度、好ましくは６〜１３重量％程度、さらに好ましく
は８〜１０重量％程度である。The content of silicon dioxide is 5 to 15% by weight.
The amount is preferably about 6 to 13% by weight, more preferably about 8 to 10% by weight.
【００１９】酸化アルミニウムの含有量は、５〜１５重
量％程度、好ましくは６〜１３重量％程度、さらに好ま
しくは８〜１０重量％程度である。The content of aluminum oxide is about 5 to 15% by weight, preferably about 6 to 13% by weight, more preferably about 8 to 10% by weight.
【００２０】酸化チタンの含有量は、１０〜２０重量％
程度、好ましくは１２〜１９重量％程度、さらに好まし
くは１５〜１７重量％程度である。The content of titanium oxide is 10 to 20% by weight.
The amount is preferably about 12 to 19% by weight, more preferably about 15 to 17% by weight.
【００２１】グラスパウダーの含有量は、１〜５重量％
程度、好ましくは１〜４重量％程度、さらに好ましくは
２〜４重量％程度である。The content of glass powder is 1 to 5% by weight
The amount is preferably about 1 to 4% by weight, more preferably about 2 to 4% by weight.
【００２２】シリコーンの含有量は、２〜７重量％程
度、好ましくは３〜７重量％程度、さらに好ましくは４
〜６重量％程度である。The content of silicone is about 2 to 7% by weight, preferably about 3 to 7% by weight, more preferably 4%.
It is about 6% by weight.
【００２３】水の含有量は、２５〜６２重量％程度、好
ましくは２５〜５０重量％程度、さらに好ましくは２８
〜４０重量％程度である。The water content is about 25 to 62% by weight, preferably about 25 to 50% by weight, more preferably 28.
It is about 40% by weight.
【００２４】上記のように、酸化アルミニウムを混合す
ることで、耐熱性が向上する。シリコーンを混入するこ
とによって、塗料の腐食を抑制するといった効果があ
る。As described above, the heat resistance is improved by mixing aluminum oxide. Mixing silicone has the effect of suppressing the corrosion of the paint.
【００２５】上記水性耐熱塗料は、例えば以下のような
方法で作ることができる。ケイ酸ナトリウム水溶液（水
ガラス）は公知の方法により作成する。例えば、二酸化
ケイ素（シリカ粉末）が３６重量％程度、酸化ナトリウ
ムが１８重量％程度、水が４６重量％程度の割合の重量
配分で、これらを撹拌容器に入れて撹拌し、ケイ酸ナト
リウム水溶液（水ガラス）を作る。The above water-based heat-resistant paint can be produced, for example, by the following method. The sodium silicate aqueous solution (water glass) is prepared by a known method. For example, silicon dioxide (silica powder) is about 36% by weight, sodium oxide is about 18% by weight, and water is about 46% by weight. These are placed in a stirring container and stirred to prepare an aqueous sodium silicate solution ( Water glass).
【００２６】上記のようにして得られた水ガラスに水を
混入して、所望の濃度のケイ酸ナトリウムの水溶液を作
る。Water is mixed with the water glass obtained as described above to prepare an aqueous solution of sodium silicate having a desired concentration.
【００２７】次にカオリンを適当な量に分割して（例え
ば１／４に分割し）、分割された量毎に、上記ケイ酸ナ
トリウム水溶液に混入し、撹拌する。さらに二酸化ケイ
素、酸化アルミニウムをそれぞれ順次混入し、それぞれ
混入する度毎に撹拌する。Next, kaolin is divided into appropriate amounts (for example, divided into 1/4), and each divided amount is mixed with the sodium silicate aqueous solution and stirred. Further, silicon dioxide and aluminum oxide are sequentially mixed, and each time they are mixed, the mixture is stirred.
【００２８】次に酸化チタンを適当な量に分割して（例
えば１／３に分割し）混入し、その度毎に撹拌する。次
にグラスパウダーを混入して撹拌する。Next, titanium oxide is mixed in an appropriate amount (for example, divided into 1/3) and mixed, and the mixture is stirred each time. Next, mix the glass powder and stir.
【００２９】さらに、水をスポイトなどを用いて、撹拌
しながら序々に混入する。さらにシリコーンを混入して
撹拌し、無臭となるまで撹拌を続ける。最後に水をスポ
イトなどを用いて、撹拌しながら序々に混入する。混入
する水の量は、必要に応じて変更する。この水の量を加
減し、塗料の粘度を調節することができる。Further, water is gradually mixed with a dropper or the like while stirring. Further, mix silicone and stir, and continue stirring until odorless. Finally, mix water gradually with a dropper while stirring. Change the amount of water mixed in as needed. The amount of this water can be adjusted to control the viscosity of the paint.
【００３０】以上のように作られた水性耐熱塗料を、被
塗布物の表面に塗布して、乾燥させると、耐熱被覆層が
形成される。水性耐熱塗料の塗布は、刷毛塗りや、吹き
つけなど、公知の方法によって行うことができる。塗布
の直前には、十分に撹拌して、組成成分を均一に分散さ
せる。The heat-resistant coating layer is formed by applying the water-based heat-resistant coating material prepared as described above to the surface of an object to be coated and drying it. The application of the water-based heat-resistant paint can be carried out by a known method such as brush application or spraying. Immediately before coating, the composition components are uniformly dispersed by thoroughly stirring.
【００３１】上記ケイ酸ナトリウム水溶液については、
これに換えてケイ酸リチウム水溶液を用いても良い。こ
のケイ酸リチウム水溶液は、公知の方法により作成す
る。例えば、ケイ酸リチウム水溶液は、ケイ酸ナトリウ
ム水溶液からナトリウムイオンをイオン交換して、ケイ
酸水溶液を作り、これにリチウム水溶液を混入して作
る。Regarding the above-mentioned sodium silicate aqueous solution,
Instead of this, an aqueous solution of lithium silicate may be used. This lithium silicate aqueous solution is prepared by a known method. For example, an aqueous solution of lithium silicate is prepared by ion-exchange sodium ions from an aqueous solution of sodium silicate to produce an aqueous solution of silicic acid, and mixing the aqueous solution of lithium therein.
【００３２】上記組成の塗料を塗布して、膜厚が３０〜
６０μm 程度の塗膜を形成すると、３０分程度以上の時
間で十分塗膜を乾燥させることができる。A coating having the above composition is applied to give a film thickness of 30 to 30.
When the coating film having a thickness of about 60 μm is formed, the coating film can be sufficiently dried in about 30 minutes or more.
【００３３】このように構成された耐熱被覆層の組成成
分は、塗布された水性耐熱塗料と同一であるが、乾燥に
よって水が蒸発するため各成分の組成比率が変化する。The composition component of the heat-resistant coating layer thus constructed is the same as that of the applied water-based heat-resistant paint, but the composition ratio of each component changes because water is evaporated by drying.
【００３４】つまり、上記水性耐熱塗料を塗布乾燥させ
て得られた耐熱被覆層の組成成分は、少なくともアルカ
リ金属ケイ酸塩を９〜２６重量％程度、二酸化ケイ素粉
末を６〜３９重量％程度を含有しており、かつ未焼成で
ある。さらに、１３重量％程度以下のグラスパウダーが
含有されていてもよい。アルカリ金属ケイ酸塩として
は、既述のようにケイ酸ナトリウムとケイ酸リチウムが
挙げられる。That is, the composition components of the heat-resistant coating layer obtained by coating and drying the above water-based heat-resistant paint are at least about 9 to 26% by weight of alkali metal silicate and about 6 to 39% by weight of silicon dioxide powder. It is contained and has not been fired. Furthermore, about 13% by weight or less of glass powder may be contained. Examples of the alkali metal silicate include sodium silicate and lithium silicate as described above.
【００３５】それぞれの含有量について、以下にその例
を挙げる。アルカリ金属ケイ酸塩の含有量は、８〜２４
重量％程度、好ましくは１０〜２０重量％程度、さらに
好ましくは１２〜１５．５重量％程度、特に１４〜１
５．５重量％程度である。Examples of the respective contents are given below. The content of alkali metal silicate is 8 to 24
Wt%, preferably 10 to 20 wt%, more preferably 12 to 15.5 wt%, especially 14 to 1
It is about 5.5% by weight.
【００３６】カオリンの含有量は、１３〜２６重量％程
度、好ましくは１５〜２４重量％程度、さらに好ましく
は２０〜２１重量％程度である。The content of kaolin is about 13 to 26% by weight, preferably about 15 to 24% by weight, more preferably about 20 to 21% by weight.
【００３７】二酸化ケイ素の含有量は、６．５〜１９．
５重量％程度、好ましくは７〜１５重量％程度、さらに
好ましくは１０〜１３重量％程度である。The content of silicon dioxide is 6.5 to 19.
It is about 5% by weight, preferably about 7 to 15% by weight, and more preferably about 10 to 13% by weight.
【００３８】酸化アルミニウムの含有量は、６．５〜１
９．５重量％程度、好ましくは７〜１５重量％程度、さ
らに好ましくは１０〜１３重量％程度である。The content of aluminum oxide is 6.5 to 1
It is about 9.5% by weight, preferably about 7 to 15% by weight, and more preferably about 10 to 13% by weight.
【００３９】酸化チタンの含有量は、１３〜２６重量％
程度、好ましくは１５〜２４重量％程度、さらに好まし
くは２０〜２１重量％程度である。The content of titanium oxide is 13 to 26% by weight.
The amount is preferably about 15 to 24% by weight, more preferably about 20 to 21% by weight.
【００４０】グラスパウダーの含有量は、０〜６．５重
量％程度、好ましくは２〜６重量％程度、さらに好まし
くは３〜５重量％程度である。The content of the glass powder is about 0 to 6.5% by weight, preferably about 2 to 6% by weight, more preferably about 3 to 5% by weight.
【００４１】シリコーンの含有量は、０〜９重量％程
度、好ましくは５〜９重量％程度、さらに好ましくは７
〜９重量％程度である。The content of silicone is about 0 to 9% by weight, preferably about 5 to 9% by weight, more preferably 7%.
It is about 9% by weight.
【００４２】水の含有量は、５〜１０重量％程度、好ま
しくは６〜９重量％程度、さらに好ましくは６〜８重量
％程度である。The content of water is about 5 to 10% by weight, preferably about 6 to 9% by weight, more preferably about 6 to 8% by weight.
【００４３】耐熱被覆層には、さらに耐熱被覆層の性能
を改良するために、他の無機質系充填剤を含有させても
よい。例えば、セリサイトを含有させれば、絶縁性能が
さらに飛躍的に向上するため、特に好ましい。さらに、
酸化アルミニウムやセラミック粉末を含有させれば、さ
らに耐熱性が向上する点で、またガラス繊維、セラミッ
ク繊維、ウイスカなどを混入させると、剥離強度等の外
力に対する強度が向上する点で、それぞれ好ましい。The heat resistant coating layer may further contain other inorganic filler in order to improve the performance of the heat resistant coating layer. For example, the inclusion of sericite is particularly preferable because the insulating performance is further improved. further,
It is preferable to contain aluminum oxide or ceramic powder, because the heat resistance is further improved, and when glass fibers, ceramic fibers, whiskers, etc. are mixed, the strength against external force such as peel strength is improved.
【００４４】[0044]
【実施例】二酸化ケイ素（ＳｉＯ2 ）３６重量％程度、
酸化ナトリウム（Ｎa2Ｏ）１８重量％程度、水４６重量
％程度からなるケイ酸ナトリウム水溶液（水ガラス）４
０ｇに、さらに水（Ｈ2 Ｏ）２６ｃｃを加えて、撹拌す
る。Example: About 36% by weight of silicon dioxide (SiO 2 ),
Aqueous sodium silicate solution (water glass) consisting of about 18% by weight of sodium oxide (Na 2 O) and about 46% by weight of water 4
To 0 g, 26 cc of water (H 2 O) is added and the mixture is stirred.
【００４５】この溶液に、表１に記載されている無機質
系充填剤を下記の順番で混入する。The inorganic fillers listed in Table 1 are mixed in this solution in the following order.
【００４６】[0046]
【表１】 [Table 1]
【００４７】カオリン（ＳｉＯ2:７０重量％程度、Ａ
l2Ｏ3:２９．３５重量％程度、Ｆe2Ｏ3:０．１４重量％
程度含有）３２ｇを４回に分けて混入し、その都度撹拌
する。Kaolin (SiO 2 : about 70% by weight, A
l 2 O 3: 29.35 wt% of, Fe 2 O 3: 0.14 wt%
32 g) is mixed in 4 times and stirred each time.
【００４８】シリカ粉末（ＳｉＯ2 ）１８ｇを混入
し、撹拌する。18 g of silica powder (SiO 2 ) is mixed and stirred.
【００４９】酸化アルミニウム（Ａl2Ｏ3 ）１８ｇを
混入し、撹拌する。18 g of aluminum oxide (Al 2 O 3 ) is mixed and stirred.
【００５０】酸化チタン（ＴｉＯ2 ）３２ｇを３回に
分けて混入し、その都度撹拌する。32 g of titanium oxide (TiO 2 ) is mixed in three times and stirred each time.
【００５１】グラスパウダー６ｇを混入し、撹拌す
る。6 g of glass powder is mixed and stirred.
【００５２】水（Ｈ2 Ｏ）１０ｃｃを混入し、約１０
分間撹拌する。About 10 cc of water (H 2 O) was mixed.
Stir for minutes.
【００５３】シリコーン１２ｇを混入し、臭気がなく
なるまで（約５分程度）撹拌する。12 g of silicone is mixed and stirred until the odor disappears (about 5 minutes).
【００５４】水（Ｈ2 Ｏ）６ｃｃを、さらに混入し、
約１０分〜１５分間撹拌する。6 cc of water (H 2 O) was further mixed in,
Stir for about 10-15 minutes.
【００５５】必要な場合には、さらに水を適量加えて
撹拌し、総重量２００ｇの本発明の水性耐熱塗料を得
る。If necessary, an appropriate amount of water is further added and the mixture is stirred to obtain a total weight of 200 g of the water-based heat-resistant paint of the present invention.
【００５６】＜耐熱試験＞以上のようにして作られた塗
料を、表２に記載されているように、各種金属板に刷毛
塗りし、厚さが６０μm 程度の耐熱被覆層（試料片Ａ−
１〜Ａ−４）を作成した。<Heat Resistance Test> As shown in Table 2, the paint prepared as described above was brush coated on various metal plates to form a heat resistant coating layer having a thickness of about 60 μm (sample A-
1 to A-4) were prepared.
【００５７】[0057]
【表２】 [Table 2]
【００５８】塗料の塗布から３０〜４０分経過した後、
前記形成された各試料片Ａ−１〜Ａ−４に対して、垂直
にガスバーナを向け、直接耐熱被覆層を前記表２に示す
温度まで加熱した。表２に示されている時間は、加熱を
開始してから該温度に達するまでの所要時間である。After 30 to 40 minutes have passed since the application of the paint,
A gas burner was directed vertically to each of the formed sample pieces A-1 to A-4, and the heat resistant coating layer was directly heated to the temperature shown in Table 2 above. The time shown in Table 2 is the time required from the start of heating until the temperature is reached.
【００５９】加熱部分の温度測定は、赤外線温度測定器
（アゲマ社製／スウェーデン）により行った。The temperature of the heated portion was measured by an infrared thermometer (Agema / Sweden).
【００６０】＜結果＞試料片Ａ−１、Ａ−４について
は、加熱部分に、ひび割れや、剥離などは発生せず、ま
た、加熱表面に変化は見られなかった。<Results> Regarding the sample pieces A-1 and A-4, cracks and peeling did not occur at the heated portion, and no change was observed on the heated surface.
【００６１】試料片Ａ−２については、加熱温度がアル
ミニウムの融点に達したため、加熱部分が溶解したが、
溶解部分の周縁部分には、耐熱被覆層が堅牢に残ってい
た。Regarding the sample piece A-2, since the heating temperature reached the melting point of aluminum, the heated portion was melted,
The heat resistant coating layer remained firmly on the peripheral portion of the melted portion.
【００６２】試料片Ａ−３については、ベニヤ合板の加
熱部分は、高熱によって水分が蒸発して炭化し、加熱部
分の耐熱被覆層は剥れたが、加熱部分の周囲の耐熱被覆
層は剥離せず、加熱部分から炎が周囲に広がることはな
かった。Regarding the sample piece A-3, in the heated portion of the veneer plywood, the heat-resistant coating layer in the heated portion was peeled off while the moisture was evaporated and carbonized due to high heat, but the heat-resistant coating layer around the heated portion was peeled off. No, the flame did not spread from the heated part to the surroundings.
【００６３】＜絶縁性試験＞上記水性耐熱塗料を金属板
の片面に塗布して、表３に示されているような、種々の
厚さの耐熱被覆層を形成した。<Insulation Test> The above water-based heat resistant paint was applied to one surface of a metal plate to form heat resistant coating layers of various thicknesses as shown in Table 3.
【００６４】[0064]
【表３】 [Table 3]
【００６５】上記表３に示されている各試料片の、耐熱
被覆層面（表面）と金属面（裏面）とに電極を接触さ
せ、商用５０Ｈｚ、単相１００Ｖの交流電圧を用い、ス
ライダック（０〜１３０Ｖ：ｍａｘ２０Ａ：２．６ｋ
Ｗ）出力を０〜３０Ｖとすることで、試料片の耐熱被覆
層面と金属面との間に、０〜１５ｋＶの交流高電圧を印
加し、試料片の絶縁耐力を試験した。試験は、上記作成
した水性耐熱塗料を塗布した後、常温で３０分間乾燥さ
せた後に行った。The electrodes were brought into contact with the heat-resistant coating layer surface (front surface) and the metal surface (back surface) of each of the sample pieces shown in Table 3 above, and a slider ac (0 ~ 130V: max 20A: 2.6k
W) By setting the output to 0 to 30 V, an AC high voltage of 0 to 15 kV was applied between the heat resistant coating layer surface and the metal surface of the sample piece, and the dielectric strength of the sample piece was tested. The test was conducted after applying the water-based heat-resistant paint prepared above and drying it at room temperature for 30 minutes.
【００６６】その結果、いずれの試料片Ｂ−１〜Ｂ−４
についても、８ｋＶでは絶縁の破壊は生じず、被覆層の
厚さが薄くても絶縁性能が極めて高いことが明らかとな
った。As a result, any of the sample pieces B-1 to B-4
Also, regarding 8 kV, it was clarified that the breakdown of the insulation did not occur and the insulation performance was extremely high even if the thickness of the coating layer was thin.
【００６７】以上の各結果は、ケイ酸ナトリウムの代わ
りにケイ酸リチウムを用いた場合でも同様に得られた。
また、これらの２つのケイ酸塩を適当な割合で混合して
用いても同様の結果を得ることができた。なお、水性耐
熱塗料にグラスパウダーを混入せず、グラスパウダーを
含有しない耐熱被覆層について同様の実験を行なった
が、上記各実験結果と同じ結果が得られた。The above results were similarly obtained when lithium silicate was used instead of sodium silicate.
Further, similar results could be obtained even if these two silicates were mixed in an appropriate ratio and used. In addition, the same experiment was conducted on the heat resistant coating layer containing no glass powder and containing no glass powder in the water-based heat resistant paint, and the same results as the above experimental results were obtained.
【００６８】また、カオリンの代わりに、同量のセリサ
イト、クレ、ジルコニアを混合し、あるいは、カオリン
に加えて、混合しても同様の結果が得られた。特に、セ
リサイトを混合した場合には、絶縁耐性が飛躍的に強化
された。The same results were obtained by mixing the same amounts of sericite, kure and zirconia instead of kaolin, or by adding and mixing kaolin. In particular, when the sericite was mixed, the insulation resistance was dramatically enhanced.
【００６９】[0069]
【発明の効果】以上説明したように、本発明の水性耐熱
塗料によれば、塗布後に乾燥させる時間が極めて短く、
かつ焼成が不要であるので、短時間で耐熱被覆層を形成
することができる。また、焼成が不要であることから、
加熱のためのコストが不要となり、コストの低減を図る
ことも可能である。As described above, according to the water-based heat-resistant paint of the present invention, the time for drying after application is extremely short,
Moreover, since the firing is unnecessary, the heat resistant coating layer can be formed in a short time. Also, since firing is unnecessary,
The cost for heating becomes unnecessary, and the cost can be reduced.
【００７０】また、形成された耐熱被覆層は、焼成され
ていない状態であるにもかかわらず絶縁性能が高く、前
記水性耐熱塗料の塗布によって容易に絶縁層を形成する
ことができる。例えば、電子配線基板などのような小さ
くかつ精密な回路の内部などに絶縁材として利用するこ
とができる。Further, the heat-resistant coating layer thus formed has a high insulating performance even though it is in a non-baked state, and the insulating layer can be easily formed by applying the water-based heat-resistant paint. For example, it can be used as an insulating material in a small and precise circuit such as an electronic wiring board.
Claims (19)
％、二酸化ケイ素粉末を５〜３０重量％含有することを
特徴とする水性耐熱塗料。1. A water-based heat-resistant coating material containing 7 to 20% by weight of an alkali metal silicate and 5 to 30% by weight of silicon dioxide powder.
を含有する請求項１に記載の水性耐熱塗料。2. The water-based heat-resistant paint according to claim 1, which further contains 10% by weight or less of glass powder.
％含有する請求項１または２に記載の水性耐熱塗料。3. The water-based heat-resistant paint according to claim 1, further comprising 30 to 50% by weight of an inorganic filler.
％含有する水溶液に、前記アルカリ金属ケイ酸塩の重量
に対して１７０〜２１０重量％の二酸化ケイ素を混入し
て得られた水溶液に、無機質系充填剤を混入して得られ
ることを特徴とする水性耐熱塗料。4. An aqueous solution obtained by mixing 170 to 210% by weight of silicon dioxide with respect to the weight of the alkali metal silicate in an aqueous solution containing 25 to 35% by weight of the alkali metal silicate, A water-based heat-resistant paint, which is obtained by mixing an inorganic filler.
ライト、セリサイト、クレ、ジルコニア、炭化ケイ素、
マグネシウム、酸化マグネシウム、アルミニウム、酸化
アルミニウム、酸化チタン、チタン、ニッケル、黒鉛、
ガラス繊維、セラミック粉末、セラミック繊維、ウイス
カよりなる群から選ばれた１種または２種以上の粉状体
または繊維を混合したものである請求項３または４に記
載の水性耐熱塗料。5. The inorganic filler is kaolin, zeolite, sericite, clay, zirconia, silicon carbide,
Magnesium, magnesium oxide, aluminum, aluminum oxide, titanium oxide, titanium, nickel, graphite,
The water-based heat-resistant paint according to claim 3 or 4, which is a mixture of one or more powders or fibers selected from the group consisting of glass fibers, ceramic powders, ceramic fibers, and whiskers.
リンを含有している請求項３ないし５のいずれかに記載
の水性耐熱塗料。6. The water-based heat resistant paint according to claim 3, wherein the inorganic filler contains at least kaolin.
ミニウムおよび／または酸化チタンを含有する請求項６
に記載の水性耐熱塗料。7. The inorganic filler further contains aluminum oxide and / or titanium oxide.
Water-based heat-resistant paint as described in.
カオリン１０〜２０重量％、二酸化ケイ素５〜１５重量
％、酸化アルミニウム５〜１５重量％、酸化チタン１０
〜２０重量％、グラスパウダー０〜５重量％、シリコー
ン０〜７重量％、水２５〜６２重量％よりなることを特
徴とする水性耐熱塗料。8. An alkali metal silicate of 5 to 18% by weight,
Kaolin 10-20% by weight, silicon dioxide 5-15% by weight, aluminum oxide 5-15% by weight, titanium oxide 10
A water-based heat-resistant paint, characterized by comprising: -20% by weight, glass powder: 0-5% by weight, silicone: 0-7% by weight, and water: 25-62% by weight.
トリウムおよびケイ酸リチウムの内の１種またはこれら
の混合物である請求項１ないし８のいずれかに記載の水
性耐熱塗料。9. The water-based heat resistant coating composition according to claim 1, wherein the alkali metal silicate is one of sodium silicate and lithium silicate or a mixture thereof.
％、二酸化ケイ素粉末を６〜３９重量％含有し、かつ未
焼成であることを特徴とする耐熱被覆層。10. A heat-resistant coating layer comprising 9 to 26% by weight of an alkali metal silicate and 6 to 39% by weight of silicon dioxide powder, and is unfired.
ーを含有する請求項１０に記載の耐熱被覆層。11. The heat resistant coating layer according to claim 10, which further contains 13% by weight or less of glass powder.
量％含有する請求項１０または１１に記載の耐熱被覆
層。12. The heat resistant coating layer according to claim 10, further containing 38 to 65% by weight of an inorganic filler.
量％含有する水溶液に対して、前記アルカリ金属ケイ酸
塩の重量に対して１７０〜２１０重量％の二酸化ケイ素
を混入して得られた水溶液に、無機質系充填剤を混入し
て得られる水性耐熱塗料を塗布乾燥させて得られること
を特徴とする耐熱被覆層。13. An aqueous solution obtained by mixing 170 to 210% by weight of silicon dioxide with respect to the weight of the alkali metal silicate to an aqueous solution containing 25 to 35% by weight of the alkali metal silicate. A heat-resistant coating layer, characterized in that it is obtained by applying an aqueous heat-resistant paint obtained by mixing an inorganic filler to the composition and drying it.
オライト、セリサイト、クレ、ジルコニア、炭化ケイ
素、マグネシウム、酸化マグネシウム、アルミニウム、
酸化アルミニウム、酸化チタン、チタン、ニッケル、黒
鉛、ガラス繊維、セラミック粉末、セラミック繊維、ウ
イスカよりなる群から選ばれた１種または２種以上の粉
状体または繊維を混合したものである請求項１２または
１３に記載の耐熱被覆層。14. The inorganic filler is kaolin, zeolite, sericite, clay, zirconia, silicon carbide, magnesium, magnesium oxide, aluminum,
13. A mixture of one or more powders or fibers selected from the group consisting of aluminum oxide, titanium oxide, titanium, nickel, graphite, glass fiber, ceramic powder, ceramic fiber and whiskers. Alternatively, the heat resistant coating layer according to item 13.
オリンを含有している請求項１２ないし１４のいずれか
に記載の耐熱被覆層。15. The heat resistant coating layer according to claim 12, wherein the inorganic filler contains at least kaolin.
ルミニウムおよび／または酸化チタンを含有する請求項
１５に記載の耐熱被覆層。16. The heat resistant coating layer according to claim 15, wherein the inorganic filler further contains aluminum oxide and / or titanium oxide.
る物質を含有している請求項１２ないし１６のいずれか
に記載の耐熱被覆層。17. The heat resistant coating layer according to claim 12, wherein the inorganic filler contains a substance having an insulating property.
％、カオリン１３〜２６重量％、二酸化ケイ素６．５〜
１９．５重量％、酸化アルミニウム６．５〜１９．５重
量％、酸化チタン１３〜２６重量％、グラスパウダー０
〜６．５重量％、シリコーン０〜９重量％、水５〜１０
重量％よりなることを特徴とする耐熱被覆層。18. Alkali metal silicate 8-24% by weight, kaolin 13-26% by weight, silicon dioxide 6.5-.
19.5% by weight, aluminum oxide 6.5 to 19.5% by weight, titanium oxide 13 to 26% by weight, glass powder 0
~ 6.5% by weight, silicone 0-9% by weight, water 5-10
A heat-resistant coating layer, characterized in that the heat-resistant coating layer is formed by weight percent.
ナトリウムおよびケイ酸リチウムの内の１種またはこれ
らの混合物である請求項１０ないし１８のいずれかに記
載の耐熱被覆層。19. The heat resistant coating layer according to claim 10, wherein the alkali metal silicate is one of sodium silicate and lithium silicate or a mixture thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19684293A JPH0726166A (en) | 1993-07-14 | 1993-07-14 | Aqueous heat-resistant paint and heat-resistant coating layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19684293A JPH0726166A (en) | 1993-07-14 | 1993-07-14 | Aqueous heat-resistant paint and heat-resistant coating layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0726166A true JPH0726166A (en) | 1995-01-27 |
Family
ID=16364573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19684293A Pending JPH0726166A (en) | 1993-07-14 | 1993-07-14 | Aqueous heat-resistant paint and heat-resistant coating layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0726166A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000044685A1 (en) * | 1999-01-27 | 2000-08-03 | Weihua Jin | Inorganic binders employing waste glass |
| JP2001234092A (en) * | 2000-02-23 | 2001-08-28 | Nankyou Efunika Kk | Inorganic coating agent |
| US6464774B1 (en) * | 2000-01-26 | 2002-10-15 | Yukio Satoh | Surface coating material incorporating lithium silicate and sodium silicate |
| JP2004323976A (en) * | 2003-04-22 | 2004-11-18 | General Electric Co <Ge> | Spot method for repairing thermal barrier coating, and composition |
| WO2006038681A1 (en) * | 2004-10-01 | 2006-04-13 | Baham Giken Corporation | Aqueous suspension composition, aqueous coating composition and coated article |
| KR100642679B1 (en) * | 2005-02-25 | 2006-11-10 | 조현주 | Coating having improved high temperature wear resistance |
| KR101254487B1 (en) * | 2012-08-10 | 2013-04-23 | 삼성세라믹(주) | Nature hardening type water-soluble mineral paint |
| CN103087564A (en) * | 2013-02-04 | 2013-05-08 | 上海鹰峰电子科技有限公司 | Inorganic insulating paint and method for manufacturing resistor by using inorganic insulating paint |
| JP2014152268A (en) * | 2013-02-08 | 2014-08-25 | Tsubakimoto Chain Co | Paint and painted article |
| JP2014152269A (en) * | 2013-02-08 | 2014-08-25 | Tsubakimoto Chain Co | Paint, painted article, and method for manufacturing paint |
| CN107032735A (en) * | 2017-04-24 | 2017-08-11 | 北京中电联发科技有限公司 | A kind of boiler insulating moulding coating, preparation method and construction method |
| JPWO2017150393A1 (en) * | 2016-02-29 | 2018-08-09 | 富士フイルム株式会社 | Aqueous coating composition, antireflection film, laminate, method for producing laminate, and solar cell module |
| JP2019156958A (en) * | 2018-03-12 | 2019-09-19 | 有限会社ケイエスケイ | Aqueous coating and object coated with the same |
| JP2020136202A (en) * | 2019-02-25 | 2020-08-31 | 三菱マテリアル株式会社 | Surge protection element |
| CN114887857A (en) * | 2022-06-17 | 2022-08-12 | 哈尔滨理工大学 | Construction method of inorganic heat-insulating coating |
| CN115260806A (en) * | 2022-08-31 | 2022-11-01 | 东北大学 | High-temperature-resistant anti-oxidation coating for medium and high manganese steel and coating method |
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1993
- 1993-07-14 JP JP19684293A patent/JPH0726166A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000044685A1 (en) * | 1999-01-27 | 2000-08-03 | Weihua Jin | Inorganic binders employing waste glass |
| US6296699B1 (en) * | 1999-01-27 | 2001-10-02 | Weihua Jin | Inorganic binders employing waste glass |
| US6464774B1 (en) * | 2000-01-26 | 2002-10-15 | Yukio Satoh | Surface coating material incorporating lithium silicate and sodium silicate |
| JP2001234092A (en) * | 2000-02-23 | 2001-08-28 | Nankyou Efunika Kk | Inorganic coating agent |
| JP2004323976A (en) * | 2003-04-22 | 2004-11-18 | General Electric Co <Ge> | Spot method for repairing thermal barrier coating, and composition |
| JP4651966B2 (en) * | 2003-04-22 | 2011-03-16 | ゼネラル・エレクトリック・カンパニイ | Field methods and compositions for repairing thermal barrier coatings |
| WO2006038681A1 (en) * | 2004-10-01 | 2006-04-13 | Baham Giken Corporation | Aqueous suspension composition, aqueous coating composition and coated article |
| KR100642679B1 (en) * | 2005-02-25 | 2006-11-10 | 조현주 | Coating having improved high temperature wear resistance |
| KR101254487B1 (en) * | 2012-08-10 | 2013-04-23 | 삼성세라믹(주) | Nature hardening type water-soluble mineral paint |
| CN103087564A (en) * | 2013-02-04 | 2013-05-08 | 上海鹰峰电子科技有限公司 | Inorganic insulating paint and method for manufacturing resistor by using inorganic insulating paint |
| JP2014152268A (en) * | 2013-02-08 | 2014-08-25 | Tsubakimoto Chain Co | Paint and painted article |
| JP2014152269A (en) * | 2013-02-08 | 2014-08-25 | Tsubakimoto Chain Co | Paint, painted article, and method for manufacturing paint |
| JPWO2017150393A1 (en) * | 2016-02-29 | 2018-08-09 | 富士フイルム株式会社 | Aqueous coating composition, antireflection film, laminate, method for producing laminate, and solar cell module |
| CN107032735A (en) * | 2017-04-24 | 2017-08-11 | 北京中电联发科技有限公司 | A kind of boiler insulating moulding coating, preparation method and construction method |
| JP2019156958A (en) * | 2018-03-12 | 2019-09-19 | 有限会社ケイエスケイ | Aqueous coating and object coated with the same |
| JP2020136202A (en) * | 2019-02-25 | 2020-08-31 | 三菱マテリアル株式会社 | Surge protection element |
| CN114887857A (en) * | 2022-06-17 | 2022-08-12 | 哈尔滨理工大学 | Construction method of inorganic heat-insulating coating |
| CN114887857B (en) * | 2022-06-17 | 2023-02-24 | 哈尔滨理工大学 | Construction method of inorganic heat-insulating coating |
| CN115260806A (en) * | 2022-08-31 | 2022-11-01 | 东北大学 | High-temperature-resistant anti-oxidation coating for medium and high manganese steel and coating method |
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