JPH0450182A - Prevention of surface pollution of sandstone - Google Patents
Prevention of surface pollution of sandstoneInfo
- Publication number
- JPH0450182A JPH0450182A JP15505890A JP15505890A JPH0450182A JP H0450182 A JPH0450182 A JP H0450182A JP 15505890 A JP15505890 A JP 15505890A JP 15505890 A JP15505890 A JP 15505890A JP H0450182 A JPH0450182 A JP H0450182A
- Authority
- JP
- Japan
- Prior art keywords
- sandstone
- modified polysiloxane
- treatment
- treatment agent
- resin
- 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.)
- Granted
Links
- 230000002265 prevention Effects 0.000 title description 3
- 239000011347 resin Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 19
- -1 polysiloxane Polymers 0.000 claims abstract description 13
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 6
- 238000011109 contamination Methods 0.000 claims description 5
- 150000003961 organosilicon compounds Chemical class 0.000 abstract description 4
- 241000233866 Fungi Species 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 238000001723 curing Methods 0.000 abstract description 3
- 125000000217 alkyl group Chemical group 0.000 abstract description 2
- 238000013007 heat curing Methods 0.000 abstract description 2
- 239000003960 organic solvent Substances 0.000 abstract description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 abstract description 2
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 abstract description 2
- 241000195940 Bryophyta Species 0.000 abstract 2
- XPDGHGYGTJOTBC-UHFFFAOYSA-N methoxy(methyl)silicon Chemical compound CO[Si]C XPDGHGYGTJOTBC-UHFFFAOYSA-N 0.000 abstract 1
- 239000002352 surface water Substances 0.000 abstract 1
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 12
- 230000000694 effects Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 235000006408 oxalic acid Nutrition 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000002845 discoloration Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007761 roller coating Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N hydrochloric acid Substances Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Finishing Walls (AREA)
- Building Environments (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、建設材料の一種である砂岩の表面汚染防止方
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for preventing surface contamination of sandstone, which is a type of construction material.
多孔性表面を有する砂岩は、雨水により含水率が高くな
り、日陰、風通しの悪い場所においてはかびや苔の発生
が生じやすい。いったん発生すると多孔性表面の孔の中
にかびや苔の菌が多く存在するため、除去することは困
難を窮める。従来の除去技術としては、、しゅう酸の希
釈液を砂岩の表面に塗布し、これをブラシ等でこすって
除去し、ついで、清水をもってすばやく砂岩表面に付着
したしゅう酸希釈液を除去する方法がある。Sandstone, which has a porous surface, has a high moisture content due to rainwater, and is prone to mold and moss in shady and poorly ventilated areas. Once it occurs, it is extremely difficult to remove it because there are many mold and moss bacteria in the pores of the porous surface. The conventional removal technique is to apply a diluted oxalic acid solution to the sandstone surface, rub it with a brush, etc., and then quickly remove the oxalic acid diluted solution that has adhered to the sandstone surface using clean water. be.
砂岩の表面に発生したかびや苔は、しゅう酸の希釈液を
表面に塗布し、ブラシ等でこすり、清水ですばやく洗浄
しても、逆に多孔性材料表面の孔の奥に入り込み、かび
や苔の菌が完全に除去できないため、時間が経過すると
ともにまたかびや苔を発生してしまう。Even if you apply a diluted solution of oxalic acid to the surface of sandstone, scrub it with a brush, and quickly wash it with clean water, the mold and moss that has formed on the surface of the sandstone will instead penetrate deep into the pores on the surface of the porous material, causing mold and moss to grow. Since the bacteria on the moss cannot be completely removed, mold and moss will grow over time.
また、砂岩は弱酸であるしゅう酸の希釈液といえども酸
の作用によって表面がおかされるため１〜２年後には浸
食の影響を受けて茶色に変色したり、シミが生じてしま
うという問題点があった。In addition, the surface of sandstone is damaged by the action of the acid, even if it is diluted with oxalic acid, which is a weak acid, so after one to two years, the problem is that it will turn brown or become stained due to erosion. There was a point.
本発明は、このような従来の問題点に着目してなされた
ものであり、その目的とするところは、多孔性表面を有
する砂岩の表面に発生するかびや苔等の汚染防止方法を
提供して、上記従来の問題点を解決することにある。The present invention has been made in view of these conventional problems, and its purpose is to provide a method for preventing contamination such as mold and moss from occurring on the surface of sandstone having a porous surface. The purpose of this invention is to solve the above-mentioned conventional problems.
本発明者らは、前記した問題点を解決するために鋭意研
究を重ねた結果、砂岩表面に特定のポリシロキサン樹脂
からなる処理剤を含浸させ、硬化させることにより解決
できることを見い出し本発明を完成するに至った。As a result of intensive research to solve the above-mentioned problems, the present inventors discovered that the problem could be solved by impregnating the sandstone surface with a treatment agent made of a specific polysiloxane resin and curing it, and completed the present invention. I ended up doing it.
かくして、本発明に従えば、
砂岩表面の含水率を１５％以下、好ましくは５％以下に
したのち、その表面にはしご構造をもつ変性ポリシロキ
サン系樹脂からなる処理剤を含浸せしめ、ついで硬化処
理を行うことにより砂岩表面におけるかびや苔等の発生
を防止することを特徴とする砂岩の表面汚染防止方法が
提供される。Thus, according to the present invention, after the water content of the sandstone surface is reduced to 15% or less, preferably 5% or less, the surface is impregnated with a treatment agent made of a modified polysiloxane resin having a ladder structure, and then hardened. Provided is a method for preventing surface contamination of sandstone, which is characterized in that the formation of mold, moss, etc. on the surface of sandstone is prevented by performing the following steps.
本発明方法に用いられる砂岩は建設材料の一種であり、
割れ肌のラフな仕上がりを形成するもので、その表面に
防カビ等の目的で処理剤を塗布しても、塗布を感じさせ
ない仕上がりになること、すなわち塗膜感を与えないこ
とが必要である。該砂岩表面の含水率は１５％以下であ
ることが必要であり、１５％を超えると処理剤の含浸が
不十分となり好ましくない。前記したはしご構造をもつ
変性ポリシロキサン系樹脂からなる処理剤はこの目的を
満足させるものであり、しかも変性ポリシロキサン系樹
脂の濃度を３〜６重量％の低濃度範囲にして使用すると
、塗布表面の乾燥後の仕上り色が濡れ色にならず未処理
の場合と同じ外観を得るのことができるという特徴があ
る。The sandstone used in the method of the present invention is a type of construction material,
It forms a rough finish with cracked skin, and even if a treatment agent is applied to the surface for purposes such as mold prevention, it is necessary to have a finish that does not give the impression that it has been applied, that is, it does not give the feeling of a paint film. . The moisture content of the surface of the sandstone must be 15% or less; if it exceeds 15%, impregnation with the treatment agent will be insufficient, which is not preferred. The treatment agent made of a modified polysiloxane resin with a ladder structure described above satisfies this purpose, and when used at a low concentration range of 3 to 6% by weight, the coating surface becomes It has the characteristic that the finished color after drying does not become a wet color, and it is possible to obtain the same appearance as when untreated.
変性ポリシロキサン系樹脂は、テトラメトキシシラン、
テトラエトキシシラン等の４官能性有機珪素化合物及び
／又はメチルトリメトキシシラン、メチルトリエトジシ
ラン、フェニルトリメトキシシラン等の３官能性有機珪
素化合物を縮合して得られるはしご構造を有する有機珪
素高縮合物であり、例えば、一般式：
（式中Ｒは炭素数１〜４個のアルキル基またはフェニル
基であり、ｎは３０〜８０の整数である）で表される構
造を有するものが例示される。Modified polysiloxane resins include tetramethoxysilane,
Organosilicon high condensation product having a ladder structure obtained by condensing a tetrafunctional organosilicon compound such as tetraethoxysilane and/or a trifunctional organosilicon compound such as methyltrimethoxysilane, methyltriethodisilane, phenyltrimethoxysilane For example, those having a structure represented by the general formula: (wherein R is an alkyl group having 1 to 4 carbon atoms or a phenyl group, and n is an integer of 30 to 80) are exemplified. Ru.
該変性ポリシロキサン系樹脂は、有機溶剤に可溶で、通
常固形分含有量２〜１０重量％、濡れ色にならない点で
は、好ましくは３〜６重量％の濃度に希釈され、そのま
ま処理剤として使用される。The modified polysiloxane resin is soluble in organic solvents, usually has a solid content of 2 to 10% by weight, and is preferably diluted to a concentration of 3 to 6% by weight in terms of not causing wet color, and can be used as a processing agent as it is. used.
該固形分含有量が２重量％未滴の場合は、表面汚染防止
効果が得られないので好ましくなく、１０重量％を超え
ると表面の仕上り色が濡れ色になり、処理剤の含浸が不
十分となるので好ましくない。If the solid content is less than 2% by weight, it is not preferable because the effect of preventing surface contamination cannot be obtained, and if it exceeds 10% by weight, the finished surface color will be wet and the impregnation of the treatment agent will be insufficient. This is not desirable.
該処理剤の塗布は通常の塗布、例えば刷毛塗り、吹付は
塗り、ローラー塗り、浸漬塗装などにより行うことがで
き、その際の塗布量は特に制限はないが、一般に９０〜
３００ ｇ／ボである。The treatment agent can be applied by conventional methods such as brush coating, spraying, roller coating, dip coating, etc. The amount applied is not particularly limited, but is generally 90 to 90%.
It is 300 g/bo.
砂岩表面に塗布される変性ポリシロキサン系樹脂は、硬
化処理されるが、塩基性触媒を使用する場合には、常温
でも硬化するが、２００°Ｃ迄の温度で加熱硬化させる
ことが有利である。また酸性触媒を使用する場合は２０
０°Ｃ前後の温度で加熱硬化される。The modified polysiloxane resin applied to the sandstone surface is cured, and if a basic catalyst is used, it will cure at room temperature, but it is advantageous to heat cure it at a temperature of up to 200°C. . In addition, when using an acidic catalyst, 20
It is cured by heating at a temperature of around 0°C.
変性ポリシロキサン系樹脂は、硬化処理によって、砂岩
表面層に存在する官能基と下記の式で表される架橋反応
によって汚染防止膜を形成する。The modified polysiloxane resin forms a stain prevention film through a crosslinking reaction represented by the following formula with the functional groups present in the sandstone surface layer through a curing treatment.
本発明を実施例によって具体的に説明する。実施例にお
いて部及び％は重量基準である。The present invention will be specifically explained by examples. In the examples, parts and percentages are by weight.
処理剤の調製例１：
反応容器に、メチルトリエトキシキラン１８７部及びエ
チルアルコール１８７部を加え、加熱して８０°Ｃにな
ったのち０．２Ｎ−塩酸３０部添加し８０°Ｃで１０時
間反応させた。Processing agent preparation example 1: Add 187 parts of methyltriethoxychiran and 187 parts of ethyl alcohol to a reaction vessel, heat to 80°C, then add 30 parts of 0.2N-hydrochloric acid and heat at 80°C for 10 hours. Made it react.
ついでトリエチルアミン３０部を加えｐＨを７以上に上
げて８０°Ｃで２時間縮合反応を行ない、その後ベンゼ
ンを添加して樹脂濃度３％、６％、及び９％の３種の処
理剤を調製した。Next, 30 parts of triethylamine was added, the pH was raised to 7 or higher, and a condensation reaction was carried out at 80°C for 2 hours. Then, benzene was added to prepare three types of treatment agents with resin concentrations of 3%, 6%, and 9%. .
実施例１
表面含水率が４．５％の砂岩の表面に、前記で得た３種
類の変成ポリシロキサン系樹脂よりなる処理剤をローラ
ー塗りによって２０閣の浸透深さに含浸処理し、２００
℃で３０分間加熱硬化を行って樹脂を硬化させた。そし
て、該処理剤で処理したものの表面に６種混合のかびの
菌を試験体に植付け、かびの菌糸の繁殖面積と胞子によ
る変色面積の測定を実施した。その測定結果を第１図に
示す。第１図において菌糸の繁殖面積は全表面積に対す
る割合を意味する。Example 1 The surface of sandstone with a surface moisture content of 4.5% was impregnated with a treatment agent made of the three types of modified polysiloxane resins obtained above to a penetration depth of 20 mm by roller coating.
The resin was cured by heating at ℃ for 30 minutes. Then, a mixture of six types of mold fungi was planted on the surface of the specimen treated with the treatment agent, and the breeding area of mold hyphae and the area of discoloration due to spores were measured. The measurement results are shown in FIG. In FIG. 1, the hyphal propagation area means the ratio to the total surface area.
第１図において、胞子による変色面積Ｃ％）は、全表面
積に対する百分率を意味する。In FIG. 1, the area of discoloration due to spores (C%) means the percentage of the total surface area.
第１図において「２８℃７日後」および「２８”Ｃ１４
日後」はそれぞれ試料の放置条件を意味する。In Figure 1, "28℃ 7 days later" and "28" C14
"days later" means the conditions under which the sample was left.
比較例１
処理剤で処理しない以外実施例１と同様の実験を行なっ
た。得られた結果を第１図に示す。Comparative Example 1 An experiment similar to Example 1 was conducted except that no treatment agent was used. The results obtained are shown in FIG.
実施例２
前記調製例１において得られた樹脂濃度６％の処理剤を
用いて実施例１におけると同様に処理された試料につい
て、屋外暴露実験を行い、かびや苔が繁殖しやすいよう
に北面の直射日光の当たらない日陰で１９力月の暴露を
実施した。その結果、かびや苔の発生はほとんど見られ
なかった。Example 2 An outdoor exposure experiment was conducted on samples treated in the same manner as in Example 1 using the treatment agent with a resin concentration of 6% obtained in Preparation Example 1. Exposure for 19 months was carried out in the shade, away from direct sunlight. As a result, almost no mold or moss was observed.
実施例３
処理剤を構成する樹脂を２０℃で５日間硬化させて試料
を作製した以外、実施例２と同様の実験を行なったとこ
ろ、実施例２と同様の結果が得られた。Example 3 The same experiment as in Example 2 was conducted, except that the resin constituting the treatment agent was cured at 20° C. for 5 days to prepare a sample, and the same results as in Example 2 were obtained.
比較例２
処理剤による処理を行なわなかった以外、実施例２と同
様の実験を行なったところ、全面にかびおよび苔が発生
した。Comparative Example 2 When the same experiment as in Example 2 was conducted except that no treatment with a treatment agent was performed, mold and moss were generated on the entire surface.
上記した実施例および比較例の結果から、変成ポリシロ
キサン系樹脂からなる処理剤の汚染防止効果が確認でき
た。From the results of the above-mentioned Examples and Comparative Examples, it was confirmed that the treatment agent made of the modified polysiloxane resin has a stain-preventing effect.
以上説明したように、本発明によれば、はしご構造を持
つ変成ポリシロキサン系樹脂からなる処理剤を、砂岩の
多孔性表面に含浸処理し、硬化処理を行うことにより、
砂岩表面においてかび、苔等の発生を防止し、しかも塗
膜感を与えることなく濡れ色にならないという効果が得
られる。As explained above, according to the present invention, by impregnating the porous surface of sandstone with a treatment agent made of a modified polysiloxane resin having a ladder structure and performing a hardening treatment,
It prevents the growth of mold, moss, etc. on the sandstone surface, and has the effect of not giving a wet color without giving a feeling of paint film.
第１図は、処理剤の樹脂濃度とかびの菌糸の繁殖面積お
よび胞子による変色面積との関係を示すグラフである。FIG. 1 is a graph showing the relationship between the resin concentration of the treatment agent, the breeding area of mold hyphae, and the area of discoloration due to spores.
Claims (1)
面にはしご構造を持つ変成ポリシロキサン系樹脂からな
る処理剤を含浸せしめ、ついで硬化処理を行うことによ
り、砂岩表面におけるかびや苔等の発生を防止すること
を特徴とする砂岩の表面汚染防止方法。1. After reducing the water content of the sandstone surface to 15% or less, the surface is impregnated with a treatment agent made of a modified polysiloxane resin with a ladder structure, and then hardened to remove mold and moss on the sandstone surface. A method for preventing surface contamination of sandstone, characterized by preventing the occurrence of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15505890A JP2826568B2 (en) | 1990-06-15 | 1990-06-15 | Sandstone surface contamination prevention method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15505890A JP2826568B2 (en) | 1990-06-15 | 1990-06-15 | Sandstone surface contamination prevention method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0450182A true JPH0450182A (en) | 1992-02-19 |
| JP2826568B2 JP2826568B2 (en) | 1998-11-18 |
Family
ID=15597751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15505890A Expired - Fee Related JP2826568B2 (en) | 1990-06-15 | 1990-06-15 | Sandstone surface contamination prevention method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2826568B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06128055A (en) * | 1992-10-23 | 1994-05-10 | Toyo Ink Mfg Co Ltd | Aqueous organosilicon-based composition having excellent corrosion resistance and fungus resistance |
| CN114315415A (en) * | 2021-12-17 | 2022-04-12 | 上海大学 | Method for preventing biological weathering of moss on sandstone stones by using alcaligenes |
-
1990
- 1990-06-15 JP JP15505890A patent/JP2826568B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06128055A (en) * | 1992-10-23 | 1994-05-10 | Toyo Ink Mfg Co Ltd | Aqueous organosilicon-based composition having excellent corrosion resistance and fungus resistance |
| CN114315415A (en) * | 2021-12-17 | 2022-04-12 | 上海大学 | Method for preventing biological weathering of moss on sandstone stones by using alcaligenes |
| CN114315415B (en) * | 2021-12-17 | 2022-09-16 | 上海大学 | Method for preventing biological weathering of moss on sandstone stones by using alcaligenes |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2826568B2 (en) | 1998-11-18 |
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