JPH01252593A - Method for coating shaped cement body - Google Patents
Method for coating shaped cement bodyInfo
- Publication number
- JPH01252593A JPH01252593A JP8108888A JP8108888A JPH01252593A JP H01252593 A JPH01252593 A JP H01252593A JP 8108888 A JP8108888 A JP 8108888A JP 8108888 A JP8108888 A JP 8108888A JP H01252593 A JPH01252593 A JP H01252593A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- coating
- emulsion resin
- cement slurry
- excipient
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004568 cement Substances 0.000 title claims abstract description 42
- 239000011248 coating agent Substances 0.000 title claims abstract description 23
- 238000000576 coating method Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims description 7
- 229920005989 resin Polymers 0.000 claims abstract description 20
- 239000011347 resin Substances 0.000 claims abstract description 20
- 239000000839 emulsion Substances 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 7
- 239000000546 pharmaceutical excipient Substances 0.000 claims description 18
- 239000003973 paint Substances 0.000 claims description 16
- 238000007581 slurry coating method Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 abstract description 15
- 230000002087 whitening effect Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 239000002585 base Substances 0.000 description 12
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000006253 efflorescence Methods 0.000 description 5
- 206010037844 rash Diseases 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000002952 polymeric resin Substances 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 230000009974 thixotropic effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- VBIXEXWLHSRNKB-UHFFFAOYSA-N ammonium oxalate Chemical compound [NH4+].[NH4+].[O-]C(=O)C([O-])=O VBIXEXWLHSRNKB-UHFFFAOYSA-N 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 etc. Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、セメント系外壁材、屋根材等のような建築用
板材の白華を防止するための表面化粧塗装に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a decorative surface coating for preventing efflorescence on architectural board materials such as cement-based exterior wall materials, roofing materials, and the like.
セメント賦形体表面の白華現象を防止するため、従来一
般に採用されている塗装方法は、セメント、シリカ、補
強用繊維、顔料、その他の充填剤等の混合物に水を加え
て均一に混合した後、流し込み、プレス、押出等の適宜
な方法により賦形して得られる賦形体直上に下記第１表
に示すような配合のセメントスラリー下地塗料を施し、
その直後にエマルジョン樹脂下塗り塗料、例えばアクリ
ル−スチレン共重合エマルジョン樹脂下塗を塗布した後
、養生硬化させ、次いで再度上記エマルジョン樹脂下塗
り塗料と同じ塗料を上塗リエマルジッン樹脂塗料として
塗布し、乾燥する方法である。In order to prevent efflorescence on the surface of cement excipients, the commonly used painting method is to add water to a mixture of cement, silica, reinforcing fibers, pigments, other fillers, etc., and then mix the mixture uniformly. , apply a cement slurry base paint having a composition as shown in Table 1 below directly on the shaped body obtained by shaping by an appropriate method such as pouring, pressing, extrusion, etc.,
Immediately thereafter, an emulsion resin undercoat, such as an acrylic-styrene copolymer emulsion resin undercoat, is applied, cured, and then the same paint as the emulsion resin undercoat is applied again as a top coat, followed by drying. .
第１表 従来使用されているセメント
スラリー下地塗料の配合組成
成 分 配合組成（重量部）セメント
１００頭 料
５添加剤
１水
４０〔発明が解決しようとする課題〕
セメント賦形体の白華現象は、セメント中に含有されて
いるアルカリ成分、特に水酸化カルシウムが水分と共に
セメント賦形体の表面に浸出し、空気中の炭酸ガスと反
応して炭酸カルシウムを生成するために生起すると考え
られているが、上述した従来法、即ち賦形体直上にセメ
ントスラリー下地塗料を施し、その上にエマルジョン樹
脂塗料を塗布する方法によって、白華原因となるアルカ
リ成分の溶出を防止することができる。しかしながら、
セメント賦形体を長年月間風雨に曝すときは、エマルジ
ョン樹脂に存在するピンホールを通し空気や雨水が浸入
することは避けられず、そのときセメント賦形体やセメ
ントスラリー下地塗膜中に含有されるアルカリ成分、例
えば水酸化カルシウムは溶解、再結晶、炭酸化などの反
応を惹起し、そのためエマルシラン樹脂塗膜が突き上げ
られ、エマルジョン樹脂塗膜に亀裂が発生し、塗膜が剥
離、飛散し、全部の塗膜が飛散して無くなる迄、賦形体
表面が白化して見え、外観が著しく損なわれるという問
題があった。Table 1 Composition of conventionally used cement slurry base paints Composition (parts by weight) Cement 100 heads
5 additives
1 water
40 [Problem to be Solved by the Invention] The efflorescence phenomenon of cement excipients is caused by alkaline components contained in cement, especially calcium hydroxide, leaching out to the surface of cement excipients together with moisture, and carbon dioxide gas in the air. It is thought that efflorescence occurs due to reaction with calcium carbonate to produce calcium carbonate.However, by the conventional method mentioned above, that is, applying a cement slurry base paint directly on the excipient and applying an emulsion resin paint on top of it, efflorescence can be caused by the formation of calcium carbonate. Elution of causative alkaline components can be prevented. however,
When cement excipients are exposed to wind and rain for many years, it is inevitable that air and rainwater will enter through the pinholes present in the emulsion resin, and at that time, the alkali contained in the cement excipients and the cement slurry base coating will be absorbed. Ingredients, such as calcium hydroxide, cause reactions such as dissolution, recrystallization, and carbonation, which push up the emulsion resin coating, cause cracks to occur in the emulsion resin coating, and cause the coating to peel and scatter, causing all Until the coating film scatters and disappears, the surface of the excipient body appears white and the appearance is significantly impaired.
この難点を克服するため、前記したセメントスラリー下
地塗料中に金属石鹸、パラフィンなどのような排水剤、
アンモニウムカーボネート、アンモニウムオキサレート
、水ガラスなどのような防水剤、或いは高分子樹脂を配
合する等の種々の工夫がなされているが、これらの方法
ではセメントの硬化を遅くしたり、或いは反対に促進し
たりするので、作業性が著しく悪くなるという欠点があ
ったり、高分子樹脂を配合した場合は樹脂分のチクソト
ロピー性のために、表面に凹凸模様のある賦形体に塗布
したとき平滑になりすぎて、美しい凹凸模様を表現でき
なかったりする問題があった。In order to overcome this difficulty, drainage agents such as metal soap, paraffin, etc. are added to the cement slurry base paint.
Various attempts have been made to incorporate waterproofing agents such as ammonium carbonate, ammonium oxalate, water glass, etc., or polymer resins, but these methods either slow down the hardening of cement or, on the contrary, accelerate it. If a polymeric resin is blended, the thixotropic properties of the resin may cause the surface to become too smooth when applied to an excipient with an uneven pattern. Therefore, there was a problem that it was not possible to express beautiful uneven patterns.
本発明は、上記の問題を解決するため、セメントスラリ
ー下地塗料中にセメント分１００重量部に対し５〜２０
重量部に相当する量のポラゾン物質を含有せしめたもの
である。In order to solve the above-mentioned problems, the present invention provides 5 to 20 parts of cement per 100 parts by weight of cement in a cement slurry base paint.
It contains a porazone substance in an amount corresponding to parts by weight.
ポラゾン物質としては、天然産のものとして、火山灰、
ケイ酸白土、ケイソウ土、微石粉などが安価に用いられ
、人工産のものとしては、フライアッシュ、シリカヒユ
ーム、シリカフラワー等として安価に市販されているも
のを使用することができる。Naturally occurring porazon substances include volcanic ash,
Silicate clay, diatomaceous earth, fine stone powder, etc. are used at low cost, and artificially produced materials such as fly ash, silica hume, silica flour, etc., which are commercially available at low cost, can be used.
本発明において、ポラゾン物質の好ましい含有量をセメ
ント分１００３！量部に対し５〜２０重量部としたのは
、５１量部未満の配合量では白化防止効果が少なくなる
からであり、他方２０重量部を超える量ではセメントの
硬化を遅くしたり速くしすぎたりして作業性を害するか
らである。In the present invention, the preferred content of the porazone substance is 1003% of the cement content! The reason why the amount is 5 to 20 parts by weight is that if the amount is less than 51 parts, the anti-whitening effect will be reduced, whereas if the amount exceeds 20 parts by weight, the hardening of the cement will be slow or too fast. This is because it may cause damage to workability.
本発明は、上述したとおりの構成であるから、セメント
賦形体を長年月風雨に曝露して使用中に、樹脂塗膜中に
存在するピンホールを通して雨水や炭酸ガスが浸入して
も、セメントスラリー下地塗料に配合したポラゾン物質
中に含有されている活性シリカによってセメント賦形体
やセメントスラリー塗膜から溶出してくるアルカリ成分
、例えば水酸化カルシウムが安定な水不溶性カルシウム
シリケートになっているので、溶解、再結晶、炭酸化な
どの反応を起こさず、エマルジョン樹脂塗膜の亀裂、剥
離、飛散を生ぜしめない効果である。Since the present invention has the above-described structure, even if rainwater or carbon dioxide gas infiltrates through the pinholes present in the resin coating while the cement excipient is exposed to wind and rain for many years and is in use, the cement slurry remains intact. Alkaline components, such as calcium hydroxide, eluted from cement excipients and cement slurry coatings are converted into stable water-insoluble calcium silicate by the activated silica contained in the Porazone substance blended into the base paint, so they can be dissolved easily. , does not cause reactions such as recrystallization or carbonation, and does not cause cracking, peeling, or scattering of the emulsion resin coating.
第２表 セメントスラリー下地塗料
の配合組成
配合成分 配合組成（重量部）セメント
１００頭 料
５添加剤
１シリカフラワー（ポラゾン物り
１０水
４２セメント賦形体を型より脱型した直後に賦形体表
面に上記第２表に示した配合組成を有するセメントスラ
リー下地塗料を塗布し、その直後にアクリル−スチレン
共重合エマルジョン樹脂下塗り塗料を１平方米当たりの
固形分が１５〜２０ｇになるように塗布した後、５０℃
、９０％ＲＨの条件で１６時間養生硬化させ、次いで、
下塗り塗料と同組成のアクリル−スチレン共重合エマル
シラン樹脂塗膜を上塗り塗料として塗布し、１６５℃で
５分間乾燥し、製品（Ａ）とした。Table 2 Blend composition of cement slurry base paint Blend composition (parts by weight) Cement 100 heads Feeding
5 additives
1 Silica flower (Porazon material)
10 water
42 Immediately after demolding the cement excipient from the mold, a cement slurry base paint having the composition shown in Table 2 above is applied to the surface of the excipient, and immediately after that, 1 square layer of acrylic-styrene copolymer emulsion resin undercoat is applied. After coating so that the solid content per rice is 15-20g, heat at 50℃.
, cured for 16 hours at 90% RH, and then
An acrylic-styrene copolymer silane resin coating having the same composition as the undercoat was applied as a topcoat and dried at 165°C for 5 minutes to obtain a product (A).
上記実施例とは、セメントスラリー下地塗料の配合組成
が第１表に示す配合組成である点のみ異なり、その他の
条件は全て実施例と同じにして得られた製品（Ｂ）と上
記実施例製品（Ａ）とを自熱曝露試験（南面４５’）に
処した結果を第３表に示す。The only difference from the above example is that the composition of the cement slurry base paint is as shown in Table 1, and the product (B) obtained under all other conditions is the same as the example and the product of the above example. Table 3 shows the results of subjecting (A) to the autothermal exposure test (south face 45').
第３表
１年目 ３年目 ５年目
Ａ ＢＡ Ｂ Ａ Ｂ白化度○ ○○
Δ〜○○ △
塗膜の割れ ○ ○ Ｏ△ Ｏ×
塗膜の剥れ ○ ○ ○ Δ〜○ ○ ×〜Δ劣
化 Ｏ○ ○ △〜○ Δ ×〜Δ艶消失Ｏ○○
△ △×〜△
上表の判定基準
○：外観上変化なし
Δ：外観上変化少しあり
×：外観上著しく変化あり
〔効果〕
本発明においては、下地塗料として使用するセメントス
ラリー中にポラゾン物質が含有されているので、セメン
ト賦形体やセメントスラリー塗膜から溶出してくるアル
カリ成分がポラゾン物質中の活性シリカと反応して安定
なカルシウムシリケートになっているので、長年月使用
中に外部からエマルジン樹脂塗膜のピンホールを通して
雨水、二酸化炭素ガスが浸入しても、水による溶解、再
結晶、炭酸化などの反応が起こらず、従って、これらの
現象によってエマルジョン樹脂塗膜が突き上げられて亀
裂を生じ、エマルジョン樹脂塗膜が絶えず飛散し、賦形
体表面を白化することがない。Table 3 1st year 3rd year 5th year A BA B A B Bleaching degree ○ ○○
Δ～○○ △ Paint film cracking ○ ○ O△ O× Paint film peeling ○ ○ ○ Δ～○ ○ ×～Δ Poor
Change ○ ○ △〜○ Δ ×〜Δ Loss of luster ○○
△ △ Since the alkaline components eluted from the cement excipients and cement slurry coating react with the active silica in the porazone material and become stable calcium silicate, emulsion may be absorbed from the outside during long-term use. Even if rainwater or carbon dioxide gas enters through pinholes in the resin coating, reactions such as dissolution, recrystallization, and carbonation will not occur, and these phenomena will push up the emulsion resin coating and cause cracks. The emulsion resin coating is constantly scattered and the surface of the excipient is not whitened.
従って、実施例の項に記載の第３表に示すとおり、従来
のセメントスラリー下地塗料を用いた場合よりもはるか
にエマルジョン塗膜の飛散が少なく、白化現象も殆んど
見受けられないという顕著な効果がある。Therefore, as shown in Table 3 in the Examples section, the scattering of the emulsion coating film is much less than when conventional cement slurry base paints are used, and the whitening phenomenon is hardly observed. effective.
また、従来法の一つであるセメントスラリー下地塗料中
に高分子樹脂を配合する方法は、樹脂分のチクソトロピ
ー性のため、凹凸模様のある賦形体への使用ができなか
ったが、ポラゾン物質にはかかるチクソトロピー性がな
いので、凹凸のある賦形体への使用も可能であるという
効果がある。In addition, one of the conventional methods, a method of blending a polymer resin into a cement slurry base paint, could not be used for excipients with uneven patterns due to the thixotropic nature of the resin. Since it does not have such thixotropic properties, it has the advantage that it can also be used for shaped bodies with irregularities.
Claims (1)
装するに先だち、該エマルジョン樹脂塗装の下地塗装と
して賦形体直上に施すセメントスラリー塗装にセメント
分１００重量部に対し５〜２０重量部のポラゾン物質を
含有させることを特徴とするセメント賦形体の塗装方法
。(1) Prior to applying an emulsion resin paint to the surface of a cement excipient, 5 to 20 parts by weight of a porazone substance per 100 parts by weight of cement is added to the cement slurry coating applied directly onto the excipient as a base coating for the emulsion resin coating. 1. A method for coating a cement excipient, the method comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8108888A JPH01252593A (en) | 1988-03-31 | 1988-03-31 | Method for coating shaped cement body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8108888A JPH01252593A (en) | 1988-03-31 | 1988-03-31 | Method for coating shaped cement body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01252593A true JPH01252593A (en) | 1989-10-09 |
Family
ID=13736637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8108888A Pending JPH01252593A (en) | 1988-03-31 | 1988-03-31 | Method for coating shaped cement body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01252593A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0970931A1 (en) * | 1998-07-08 | 2000-01-12 | Rohm And Haas Company | Compositions useful for suppressing efflorescence on mineral substrates |
| SG104933A1 (en) * | 1999-12-29 | 2004-07-30 | Takachiho Corp | Paint material for constructional finishing and panel for constructional finishing and method of preparing these |
-
1988
- 1988-03-31 JP JP8108888A patent/JPH01252593A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0970931A1 (en) * | 1998-07-08 | 2000-01-12 | Rohm And Haas Company | Compositions useful for suppressing efflorescence on mineral substrates |
| SG104933A1 (en) * | 1999-12-29 | 2004-07-30 | Takachiho Corp | Paint material for constructional finishing and panel for constructional finishing and method of preparing these |
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