JP4615111B2 - Lightweight cellular concrete panel - Google Patents
Lightweight cellular concrete panel Download PDFInfo
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- JP4615111B2 JP4615111B2 JP2000337069A JP2000337069A JP4615111B2 JP 4615111 B2 JP4615111 B2 JP 4615111B2 JP 2000337069 A JP2000337069 A JP 2000337069A JP 2000337069 A JP2000337069 A JP 2000337069A JP 4615111 B2 JP4615111 B2 JP 4615111B2
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- cellular concrete
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Description
【0001】
【発明の属する技術分野】
この発明は、表面保護の目的で軽量気泡コンクリートに下地塗装した下地処理仕上げパネルの塗装方法に関する。
【0002】
【従来の技術】
軽量気泡コンクリートに対して塗装を行う場合、軽量気泡コンクリート表面の起伏が大きい為、表面を平滑できれいに塗装するには他の窯業系建材に比較し、著しく多量な塗料を塗布する必要がある。
しかし、一般的な塗膜の場合、厚くすると塗膜の端部が引っ張られた時に、塗膜が軽量気泡コンクリート基材表面から皮がむける様に剥がれる、ピーリング現象を起こしてしまう。
【0003】
また、厚膜の塗膜を形成させる為に、本来の塗装範囲以外の部分まで、特にパネル端部小口部に塗料が付着した場合、パネル幅や長さが増大し、何枚も並べた時に寸法が合わなくなり、建て込みが出来なくなる事態が発生する。その防止の為には通常マスキングテープを貼付して対応している。
また、軽量気泡コンクリートは元来、その構造から、吸水しやすく、防水処理が必須とされてきた。塗膜の防水性能を高めるには一般的に塗料の樹脂を軟らかくし、塗膜の展延性を上げて軽量気泡コンクリート表面を覆い易くする事が知られている。しかし、この、樹脂を軟らかくする行為は先述のピーリング現象を助長するだけでなく、更に塗膜の粘着性を上げてしまう為、軽量気泡コンクリートパネルを積み重ね、運搬する時にはパネル同士を付着させてしまう。
【0004】
これらの理由から、現状では軽量気泡コンクリートは施工現場にて、建て込んでから塗装する事が一般的となっている。しかし、塗装品質の安定、工期短縮のメリットから軽量気泡コンクリートも工場塗装される事が要望されている。
また、軽量気泡コンクリートは壁面に化粧目地が施される事が一般的であり、その目地の深い事が軽量気泡コンクリートの壁板が好まれる一因となっている。
しかし、目地の深さは塗装を困難にし、スプレー塗装により表面テクスチュアを阻害する程度まで過剰に塗装するか、現場の塗装法をそのまま工場に持ち込んだ刷毛等による手塗り塗装する事が行われてきた。
【0005】
【発明が解決しようとする課題】
本発明は、これらの問題を解決し、マスキング無しで端部小口面は塗装せず、かつ、深い化粧目地を有する軽量気泡コンクリート基材でも均一に塗装し、良好な防水性能を有するパネルを塗装する方法を提供する事を課題とするものである。
【0006】
【課題を解決するための手段】
上記課題を解決する為に鋭意検討した結果、本発明に到った。すなわち、本発明は下記の通り。
(1)軽量気泡コンクリートパネルの塗装方法であって、軽量気泡コンクリートパネルの表面から、水系エマルション樹脂を固形分で0.01〜0.08kg/m2 の塗布量でスプレーにより塗布した後、該軽量気泡コンクリートパネルの表面から架橋硬化型水系エマルション樹脂を含有する塗料をフローコーターにより塗装してなることを特徴とする、軽量気泡コンクリートパネルの塗装方法。
【0007】
(2)架橋硬化型水系エマルション樹脂が、ヒドラジド、ウレタン、エポキシ、カルバゾンのいずれか、あるいはそれら架橋を組み合わせた樹脂であることを特徴とする、(1)記載の軽量気泡コンクリートパネルの塗装方法。以下、本発明につき詳細に説明する。軽量気泡コンクリートは、乾いた状態では撥水性を呈するのでフローコーター塗装では化粧目地部の斜面の様な箇所ではハジキにより塗装されにくい。そこで、塗装したい箇所に水系エマルション樹脂を塗って親水性の面とすることで塗装不要な箇所のみで塗料をハジかせ、選択的に塗着する場所が指定出来、図1に示す様な塗り分けを行い、塗装したくない端部面は塗り残す事が可能となる。
【0008】
図1においては、斜線部が望ましい塗装範囲の例を示し、その他部分は塗装されないことが望ましい範囲である。
また、体質顔料を多く含んだ塗料では直接塗布によると、軽量気泡コンクリート基材に対して浸透し難いが、水系エマルション樹脂を塗料の塗布前に塗る事で塗料を浸入させる事が出来る。これにより塗料と軽量気泡コンクリートの密着性が確保出来、ピーリングの防止効果も併せ持つ事が出来る。
【0009】
使用する水系エマルション樹脂は樹脂固形分が20〜40wt%の範囲のものが好ましく、固形分の20%より少ないものは軽量気泡コンクリート基材へ浸透が過剰になり易く、その後に塗布する塗料の、軽量気泡コンクリート基材への引き込みが多くなって表層塗膜を薄くしてしまいやすいので、防水性能の確保の点から20wt%以上が好ましい。浸透量0.5mmを達成するための流動性確保の点で40wt%以下が好ましい。この、浸透量0.5mmを目安とする根拠は、
軽量気泡コンクリートは、通常表面をピアノ線で切断され、その時に生じるささくれが0.5mm程度の深さで表面を覆っており、このささくれよりも深くまで浸透させる為である。
【0010】
塗料を軽量気泡コンクリート表面のささくれよりも深くまで浸透させる事、および浸透が過剰にならない事を合わせ考えると水系エマルション樹脂は20〜40wt%の固形分のものを固形分換算で0.01〜0.08kg/m2の塗布量で塗装する事が望ましい。より好ましい塗布量は、固形分換算で0.04〜0.06kg/m2である。
この水系エマルション樹脂を塗布するには、刷毛、ローラー、スプレー等の塗装法が用いられる。特にパネル中心部からスプレーで吹き付けると図2に示す様に水系エマルションが放射状に飛散する為、平面部、平面化粧目地部、面取り部のみに付着し、刷毛等の手塗りに比較して早く、簡易に良好な塗布が出来る。
【0011】
この水系エマルションを塗布した軽量気泡コンクリートの上にフローコーターで塗装する事で、高塗着効率で、かつ塗膜が平滑でテクスチャーを損なう事のない外観を有する軽量気泡コンクリート塗装パネルを得る事が出来る。
カーテンフローコーターで塗装する時に、水系塗料を用いる事で表面張力によりカーテンフローが横に引っ張られる。この横に引く力が働き、パネルの端部小口面には塗料が塗られない。
しかし、カーテンフローコーターで塗装する場合、溶剤分が多く、粘度の比較的小さい塗料を使用する事になり、乾燥する為に長時間を要することになる。また、早く流動性を落とさないとタレを起こす原因にもなってしまう。その解決手段として架橋硬化型樹脂を含む塗料を用いることが好ましい。
【0012】
【発明の実施の形態】
以下、上記下地処理材の実施態様について図1〜図4を用いて説明する。図1の斜線部は、軽量気泡コンクリートパネルの工場塗装での望ましい塗装範囲の例を示す斜視図である。表面から面取り部までを塗装し、シーリング材を打設する面は塗装しない事が好ましい。
図2はスプレーによる水系エマルション樹脂の塗布状況の例を示す断面模式図である。面取り部以下には水系エマルションが塗布されない事を示す。スプレーの吐出タイミングを制御する事で短辺側の端部も塗り残す事が可能である。
【0013】
図3は過剰に水系エマルション樹脂を塗布した場合の、軽量気泡コンクリート塗装パネルの表層状態の例を示す断面模式図である。塗料の浸透が過剰の為、塗膜が表面を覆いきれなくなってしまい、軽量気泡コンクリートが部分的に露出している。図4は適正な水系エマルション樹脂を塗布した時の例を示す同断面模式図である。適正な浸透量であれば塗膜が基材表面を覆う事で防水性能が確保される。
次に本発明の実施例を説明する。
【0014】
【実施例1】
表面に切削加工によりデザイン目地を施した軽量気泡コンクリート基材に対してアクリルエマルション(アクリル樹脂分20,30,40wt%の3種類)をエアスプレーを用いて塗着量が樹脂固形分換算で各々0.01、0.04、0.08kg/m2となる様に均一に塗布する。
これら試験体のエアスプレー塗布後、30秒後にフローコーターを用いてアクリルエマルション塗料(カルバゾン架橋型)を0.8kg/m2塗布した。これらの試験体は全て図1に示す通りの塗装範囲で塗布が行われた。これら試験体の塗装後の表面観察を行ったところデザイン目地部も塗り残し無く塗装されていることを確認した。
【0015】
また、ピーリング性の評価をJIS A 6910の×カット試験で行ったが粘着テープ側への塗膜剥がれは無く、カッター刃を入れた軽量気泡コンクリートの基材損傷による部分が取れたのみで、評価は4点以上と判定した。同時にJISA 6909の透水試験を行った。その時の透水値は全て1ml/24時間未満の良好な結果を示していた。
【0016】
【実施例2】
実施例1と同一のデザイン目地を施した軽量気泡コンクリート基材とアクリルエマルションを用い、フローコーターで塗装する塗料にアクリルエマルション塗料(ヒドラジン架橋型)を用い、同様に塗装した。その結果、実施例1と同様に外観、ピーリング性、防水性能全て良好な塗装パネルが得られた。
【0017】
【比較例1】
実施例1と同一のデザイン目地を施した軽量気泡コンクリート基材とアクリルエマルションを用い、塗料の樹脂を非架橋型のアクリルエマルションを準備し、フローコーター塗装した。その試験体でも塗装範囲の塗り分けが出来たが、タレによる外観悪化と、塗膜が薄くなってしまったことによる防水性能の低下が見られた。
【0018】
【比較例2】
実施例1で用いた軽量気泡コンクリートと同一のデザイン目地を施した基材に対してアクリルエマルション塗布無しで、実施例1と同一フィラーを用いてフローコーターによる塗装を行った。その結果、デザイン目地の斜面部にハジキが発生し、また、面取り部にもハジキによるまだら模様が生じた。この塗膜に対してピーリング性評価を行ったところ、塗膜が粘着テープに付着してしまい、JIS評価で0点の結果であった。
【0019】
【比較例3】
実施例で用いた軽量気泡コンクリートと同一のデザイン目地を施した基材に対してアクリル樹脂分20%のアクリルエマルションをエアスプレーを用いて樹脂固形分換算で0.11kg/m2で塗布した。その後、実施例1と同様にアクリルエマルション塗料(カルバゾン架橋型)を用い、フローコーターによる塗装を行った。
塗膜評価を行った結果、外観で、塗膜が全体的に薄く見え、JIS A 6909透水試験では透水値が10〜20ml/24時間となり、十分な防水性能を有していない事が分かった。
【0020】
【発明の効果】
本発明を用いることにより、塗装範囲が制御された、良好な密着性と防水性能を有する軽量気泡コンクリート塗装パネルの供給が可能になった。
【図面の簡単な説明】
【図1】軽量気泡コンクリートの望ましい塗装範囲の例を示す斜視図。
【図2】水系エマルション樹脂塗布法の1例を示す断面模式図。
【図3】水系エマルション樹脂が過剰に塗布された軽量気泡コンクリート塗装面の表層部の例を示す断面模式図。
【図4】水系エマルション樹脂が適正に塗布された軽量気泡コンクリート塗装面の表層部の例を示す断面模式図。
【符号の説明】
a…塗装面
b…スプレー
c…水系エマルション樹脂
d…ささくれ状の軽量気泡コンクリート
e…気泡[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for coating a ground-treated finishing panel in which lightweight cellular concrete is ground-coated for the purpose of surface protection.
[0002]
[Prior art]
When painting on lightweight cellular concrete, the surface of the lightweight cellular concrete has a large undulation, so it is necessary to apply a significantly larger amount of coating than other ceramic building materials in order to paint the surface smoothly and cleanly.
However, in the case of a general coating film, when it is thickened, when the end of the coating film is pulled, the coating film peels off from the surface of the lightweight cellular concrete base material, causing a peeling phenomenon.
[0003]
Also, in order to form a thick film, when the paint adheres to the part other than the original coating range, especially at the edge of the panel edge, the panel width and length increase, and when many sheets are arranged There is a situation where the dimensions do not match and the building cannot be built. To prevent this, masking tape is usually applied.
In addition, lightweight aerated concrete is inherently easy to absorb water because of its structure, and waterproofing has been essential. In order to improve the waterproof performance of the coating film, it is generally known that the resin of the coating material is softened and the spreadability of the coating film is increased to easily cover the lightweight cellular concrete surface. However, this act of softening the resin not only promotes the above-mentioned peeling phenomenon, but also increases the adhesion of the coating film, so that the lightweight cellular concrete panels are stacked and transported to each other. .
[0004]
For these reasons, it is common for lightweight cellular concrete to be painted after being built at the construction site. However, there is a demand for lightweight aerated concrete to be painted in the factory because of the stability of the coating quality and the shortening of the construction period.
Lightweight aerated concrete is generally provided with a decorative joint on the wall surface, and the deepness of the joint is one of the reasons why a lightweight aerated concrete wallboard is preferred.
However, the depth of the joints makes it difficult to paint, and it has been carried out by overpainting to the extent that the surface texture is obstructed by spray painting, or by hand painting with brushes etc. that brought the on-site painting method as it was to the factory It was.
[0005]
[Problems to be solved by the invention]
The present invention solves these problems, does not paint the edge of the edge without masking, and evenly coats lightweight lightweight concrete base material with a deep makeup joint, and paints a panel with good waterproof performance It is an object to provide a method to do this.
[0006]
[Means for Solving the Problems]
As a result of intensive studies to solve the above problems, the present invention has been achieved. That is, the present invention is as follows.
(1) A method of coating lightweight cellular concrete panel, from the surface of a lightweight cellular concrete panel was applied by spray coating amount of 0.01~0.08kg / m 2 of aqueous emulsion resin solids, the characterized in that a paint containing lightweight cellular concrete panel cross-linkable aqueous emulsion resin from the surface of the formed by coating by flow coating, lightweight cellular concrete Topa panel method painting.
[0007]
(2) the cross-linkable aqueous emulsion resin, hydrazide, urethane, epoxy, characterized in that it is a one, or resins in combination thereof crosslinking carbazone, (1) lightweight cellular concrete Topa panel method paint according . Hereinafter, the present invention will be described in detail. Lightweight aerated concrete exhibits water repellency in the dry state, so it is difficult to paint by repelling in places such as the slopes of makeup joints in flow coater painting. Therefore, by applying a water-based emulsion resin to the part to be painted to make it hydrophilic, the paint can be removed only at the part that does not need to be painted, and the place to be selectively applied can be specified. The end surface that you do not want to paint can be left unpainted.
[0008]
In FIG. 1, an example of a painting range where a hatched portion is desirable is shown, and it is desirable that other portions are not painted.
In addition, when a paint containing a lot of extender pigment is applied directly, it does not easily penetrate into the lightweight cellular concrete base material, but the paint can be infiltrated by applying an aqueous emulsion resin before applying the paint. As a result, the adhesion between the paint and the lightweight cellular concrete can be secured, and it can also have an effect of preventing peeling.
[0009]
The water-based emulsion resin to be used preferably has a resin solid content in the range of 20 to 40 wt%, and those having a solid content less than 20% tend to excessively penetrate into the lightweight cellular concrete base material. 20 wt% or more is preferable from the viewpoint of securing waterproof performance because the surface layer coating film tends to be thinned by increasing the amount drawn into the lightweight cellular concrete base material. 40 wt% or less is preferable from the viewpoint of securing fluidity to achieve a penetration amount of 0.5 mm. The basis for this penetration of 0.5 mm is
Lightweight cellular concrete is usually cut on the surface with a piano wire, and the crease that occurs at that time covers the surface with a depth of about 0.5 mm, so that it penetrates deeper than this crease.
[0010]
Considering that the paint penetrates deeper than the surface of the lightweight cellular concrete surface and that the penetration does not become excessive, the water-based emulsion resin has a solid content of 20 to 40 wt% in terms of solid content of 0.01 to 0. It is desirable to paint at a coating amount of 0.08 kg / m 2 . A more preferable coating amount is 0.04 to 0.06 kg / m 2 in terms of solid content.
In order to apply this aqueous emulsion resin, a coating method such as a brush, a roller, or a spray is used. Especially when sprayed from the center of the panel with spray, the water-based emulsion scatters radially as shown in Fig. 2, so it adheres only to the flat part, flat decorative joint, and chamfered part, compared to hand-painting such as brushes, Easy and easy application.
[0011]
By painting on a lightweight cellular concrete coated with this water-based emulsion with a flow coater, it is possible to obtain a lightweight cellular concrete coating panel with high coating efficiency, smooth coating and an appearance that does not damage the texture. I can do it.
When painting with a curtain flow coater, the curtain flow is pulled sideways by surface tension by using water-based paint. This side pulling force works, and no paint is applied to the edge edge of the panel.
However, when painting with a curtain flow coater, a paint having a high solvent content and a relatively low viscosity is used, and it takes a long time to dry. In addition, if the fluidity is not lowered quickly, it may cause sagging. It is preferable to use a paint containing a cross-linking curable resin as the solution.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the above-described base treatment material will be described with reference to FIGS. The hatched portion in FIG. 1 is a perspective view showing an example of a desirable coating range in factory coating of lightweight cellular concrete panels. It is preferable to paint from the surface to the chamfered portion and not the surface on which the sealing material is placed.
FIG. 2 is a schematic cross-sectional view showing an example of the application state of the aqueous emulsion resin by spraying. It shows that a water-based emulsion is not applied below the chamfered portion. By controlling the spraying timing of the spray, it is possible to leave the end portion on the short side.
[0013]
FIG. 3 is a schematic cross-sectional view showing an example of a surface layer state of a lightweight cellular concrete coating panel when an aqueous emulsion resin is applied excessively. Due to excessive penetration of the paint, the coating cannot cover the surface, and the lightweight cellular concrete is partially exposed. FIG. 4 is a schematic cross-sectional view showing an example when an appropriate aqueous emulsion resin is applied. If the amount of penetration is appropriate, the waterproof performance is secured by covering the substrate surface with the coating film.
Next, examples of the present invention will be described.
[0014]
[Example 1]
Acrylic emulsion (3 types of acrylic resin content of 20, 30 and 40 wt%) is applied to lightweight cellular concrete base material with design joints by cutting on the surface using air spray. Apply uniformly to 0.01, 0.04, 0.08 kg / m 2 .
After the air spray application of these specimens, an acrylic emulsion paint (carbazone crosslinking type) was applied at 0.8 kg / m 2 using a flow coater 30 seconds later. All of these test bodies were applied in the coating range as shown in FIG. When the surface of these test specimens was observed after painting, it was confirmed that the design joints were painted without any unpainted areas.
[0015]
In addition, the peelability was evaluated by the JIS A 6910 x-cut test, but there was no peeling of the coating film to the adhesive tape side, and only the part due to the substrate damage of the lightweight cellular concrete containing the cutter blade was removed. Was determined to be 4 or more. At the same time, a water permeability test of JISA 6909 was conducted. The water permeability values at that time all showed good results of less than 1 ml / 24 hours.
[0016]
[Example 2]
A lightweight cellular concrete base material and an acrylic emulsion having the same design joint as in Example 1 were used, and an acrylic emulsion paint (hydrazine cross-linked type) was used as a paint to be applied by a flow coater, and the same coating was performed. As a result, in the same manner as in Example 1, a coated panel having good appearance, peelability, and waterproof performance was obtained.
[0017]
[Comparative Example 1]
Using a lightweight cellular concrete base material having the same design joint as in Example 1 and an acrylic emulsion, a non-crosslinked acrylic emulsion was prepared as a coating resin, and was applied by a flow coater. Although the test specimens could be painted separately, the appearance deteriorated due to sagging and the waterproof performance decreased due to the thinned coating film.
[0018]
[Comparative Example 2]
The base material having the same design joint as the lightweight cellular concrete used in Example 1 was coated with a flow coater using the same filler as in Example 1 without applying the acrylic emulsion. As a result, repelling occurred on the slopes of the design joints, and mottled patterns due to repelling also occurred on the chamfered portions. When peeling property evaluation was performed with respect to this coating film, the coating film adhered to the adhesive tape, resulting in a JIS evaluation of 0 points.
[0019]
[Comparative Example 3]
An acrylic emulsion having an acrylic resin content of 20% was applied to the base material having the same design joint as that of the lightweight cellular concrete used in the examples at 0.11 kg / m 2 in terms of resin solid content using an air spray. Thereafter, in the same manner as in Example 1, an acrylic emulsion paint (carbazone crosslinking type) was used, and coating was performed with a flow coater.
As a result of the coating film evaluation, it was found that the coating film appeared to be thin overall in appearance, and the water permeability value was 10 to 20 ml / 24 hours in the JIS A 6909 water permeability test, and it did not have sufficient waterproof performance. .
[0020]
【The invention's effect】
By using the present invention , it has become possible to supply a lightweight cellular concrete coating panel having good adhesion and waterproof performance with a controlled coating range.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a desirable coating range of lightweight cellular concrete.
FIG. 2 is a schematic cross-sectional view showing an example of an aqueous emulsion resin coating method.
FIG. 3 is a schematic cross-sectional view showing an example of a surface layer portion of a lightweight cellular concrete coated surface in which an aqueous emulsion resin is excessively applied.
FIG. 4 is a schematic cross-sectional view showing an example of a surface layer portion of a lightweight cellular concrete coated surface appropriately coated with an aqueous emulsion resin.
[Explanation of symbols]
a ... painted surface b ... spray c ... water-based emulsion resin d ... whispered lightweight lightweight concrete e ... air bubbles
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| JP2000337069A JP4615111B2 (en) | 2000-11-06 | 2000-11-06 | Lightweight cellular concrete panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000337069A JP4615111B2 (en) | 2000-11-06 | 2000-11-06 | Lightweight cellular concrete panel |
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| JP2002136918A JP2002136918A (en) | 2002-05-14 |
| JP4615111B2 true JP4615111B2 (en) | 2011-01-19 |
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| JP2000337069A Expired - Lifetime JP4615111B2 (en) | 2000-11-06 | 2000-11-06 | Lightweight cellular concrete panel |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3108442B2 (en) * | 1990-12-28 | 2000-11-13 | 関西ペイント株式会社 | Aqueous dry-crosslinkable coating resin composition |
| JP2680508B2 (en) * | 1992-06-05 | 1997-11-19 | 関西ペイント株式会社 | Water-based paint for constant drying |
| JPH05337432A (en) * | 1992-06-09 | 1993-12-21 | Sekisui Chem Co Ltd | Applying method for corner external wall |
| JPH08120148A (en) * | 1994-10-26 | 1996-05-14 | Japan Synthetic Rubber Co Ltd | One-part aqueous crosslinkable dispersion |
| JP3550217B2 (en) * | 1995-04-26 | 2004-08-04 | 昭和高分子株式会社 | Sealer resin composition and method for producing the same |
| JP4012594B2 (en) * | 1997-01-16 | 2007-11-21 | 旭化成ケミカルズ株式会社 | Carbonyl group-containing latex |
| JP3949786B2 (en) * | 1997-09-04 | 2007-07-25 | 関西ペイント株式会社 | Method for forming waterproof coating |
| JP2000204286A (en) * | 1999-01-13 | 2000-07-25 | Nippon Paint Co Ltd | Undercoat coating composition and uneven inorganic decorative plate |
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2000
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