JP2909540B2 - Paint composition - Google Patents
Paint compositionInfo
- Publication number
- JP2909540B2 JP2909540B2 JP9108090A JP9108090A JP2909540B2 JP 2909540 B2 JP2909540 B2 JP 2909540B2 JP 9108090 A JP9108090 A JP 9108090A JP 9108090 A JP9108090 A JP 9108090A JP 2909540 B2 JP2909540 B2 JP 2909540B2
- Authority
- JP
- Japan
- Prior art keywords
- carbonation
- coating
- diatomaceous earth
- weight
- concrete
- 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.)
- Expired - Lifetime
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- Aftertreatments Of Artificial And Natural Stones (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、住宅用の塗料組成物に関し、特にユニット
住宅における軽量気泡コンクリート製パネルの内装塗料
として好適である。Description: TECHNICAL FIELD The present invention relates to a coating composition for a house, and is particularly suitable as an interior coating for a lightweight cellular concrete panel in a unit house.
［背景技術］ 通常のコンクリートの場合、炭酸化が問題となるの
は、その内部に埋め込まれている鋼材が腐食するからで
ある。即ち、通常のコンクリートにおけるポルトランド
セメントの主な水和物はポルトランダイトCa(OH)2であ
り、このアルカリによって鋼材は腐食から保護されてい
る。ところが、コンクリートが炭酸化されると、中性化
が起こり、防錆効果が失われる。鋼材は錆びると体積が
膨張し、これによってコンクリート自体が破壊される。[Background Art] In the case of ordinary concrete, the reason why carbonation becomes a problem is that the steel material embedded therein is corroded. That is, the main hydrate of Portland cement in ordinary concrete is portlandite Ca (OH) 2 , and the alkali protects the steel material from corrosion. However, when concrete is carbonated, it is neutralized and loses its rust prevention effect. When steel rusts, its volume expands, which destroys the concrete itself.
一方、ユニット住宅用のパネルの軽量気泡コンクリー
トのように、オートクレーブ養生（高圧高温水蒸気養
生）されているものは、通常のコンクリートとは組成及
び構造が異なる。主たる水和生成物は、良く結晶化した
Ｃ−Ｓ−Ｈ系のものであり、製造後、速やかに中性とな
るので、通常のコンクリートのようなアルカリによる鋼
材の保護効果は得られない。そこで、軽量気泡コンクリ
ートの場合、鋼材の防錆効果は、鋼材に対する防錆処理
によって得ている。したがって、軽量気泡コンクリート
では、中性化による炭酸化の問題は生じないが、軽量気
泡コンクリートにおいても炭酸化の進行に伴って多くの
問題が生じる。例えば、i.コンクリートのかさ密度が増
加して、空隙率が減少する、ii.遊離したシリカゲルに
よって、乾燥収縮は炭酸化されていないものより大きく
なる、iii.コンクリートの長さ変化は、ひび割れの原因
となる、等である。On the other hand, autoclave-cured (high-pressure, high-temperature, steam-cured) curing, such as lightweight cellular concrete for unit housing panels, differs in composition and structure from ordinary concrete. The main hydration product is a well-crystallized CSH system and becomes neutral immediately after production, so that the effect of protecting steel by alkali such as ordinary concrete cannot be obtained. Therefore, in the case of lightweight cellular concrete, the rust prevention effect of the steel material is obtained by rust prevention treatment on the steel material. Therefore, in the lightweight cellular concrete, the problem of carbonation due to neutralization does not occur, but also in the lightweight cellular concrete, many problems occur with the progress of carbonation. For example, i. The bulk density of the concrete increases and the porosity decreases, ii. The liberated silica gel causes the drying shrinkage to be greater than the uncarbonated one, and iii. Cause, etc.
［発明が解決しようとする課題］ 通常のコンクリート及び軽量気泡コンクリートの炭酸
化を防止するには、その表面を炭酸ガス透過性の低い塗
料で被覆すればよい。この際、炭酸ガス濃度は、呼気、
暖房、炊事等により、室内側が室外側より高くなるた
め、特に室内側の内装塗料についてこの特性が要求され
る。[Problems to be Solved by the Invention] In order to prevent carbonation of ordinary concrete and lightweight cellular concrete, their surfaces may be coated with a paint having low carbon dioxide gas permeability. At this time, the carbon dioxide concentration is
Due to heating, cooking, etc., the interior side is higher than the exterior side, so this property is particularly required for interior paints on the interior side.
一方、内装塗料としては、このような炭酸ガスの透過
性が低いことと共に、水蒸気の透過性が高いことが要求
される。即ち、冬期及び梅雨期においては、室内の相対
湿度が高くなり、また壁の断熱性にもよるが、内壁表面
温度は室内の空気温度より低くなる。従って、壁の表面
が露点以下になった場合、結露が生じ、衛生上、美観上
及び耐久性の点で好ましくない。この際、内装塗料が良
好な水蒸気透過性を持っていれば、建材の吸放湿性を妨
げないため、室内の湿度が高くなると壁内に水蒸気が移
動し、逆に室内の湿度が低くなると壁内の水分を放出す
るので、結露が起きにくくなる。On the other hand, the interior paint is required to have low permeability of carbon dioxide gas and high permeability of water vapor. That is, in the winter season and the rainy season, the relative humidity in the room is high and the inner wall surface temperature is lower than the room air temperature, depending on the heat insulation of the wall. Therefore, when the surface of the wall becomes lower than the dew point, dew condensation occurs, which is not preferable in terms of hygiene, aesthetics, and durability. At this time, if the interior paint has good water vapor permeability, it does not hinder the moisture absorption and desorption of the building material, so when the indoor humidity increases, the water vapor moves into the wall, and when the indoor humidity decreases, the wall Since the water inside is released, dew condensation hardly occurs.
そこで、炭酸ガスの透過性は低く、同時に水蒸気の透
過性は高い内装塗料が望まれていた。Therefore, an interior coating material having low carbon dioxide gas permeability and high water vapor permeability has been desired.
本発明は、炭酸ガスの透過性は低く、同時に水蒸気の
透過性は高い塗料組成物を提供することを目的とする。An object of the present invention is to provide a coating composition having low permeability of carbon dioxide gas and high permeability of water vapor at the same time.
［課題を解決するための手段］ 本発明に係る塗料組成物は、酢酸ビニル−アクリル共
重合樹脂エマルジョンとケイソウ土とを含有し、含有割
合を前記樹脂エマルジョンの固形分100重量部に対して
前記ケイソウ土を50〜150重量部とし、かつケイソウ土
を含む顔料体積濃度（PVC）を30〜50％としたことを特
徴とする。[Means for Solving the Problems] The coating composition according to the present invention contains a vinyl acetate-acrylic copolymer resin emulsion and diatomaceous earth, and the content is based on 100 parts by weight of the solid content of the resin emulsion. The diatomaceous earth is 50 to 150 parts by weight, and the pigment volume concentration (PVC) containing diatomaceous earth is 30 to 50%.
前記ケイソウ土としては、焼結された多孔質のものを
使用するのが好ましい。このケイソウ土の含有割合は、
前記エマルジョンの樹脂固形分100重量部に対して50重
量部より少ないと炭酸防止効果と透湿性に劣るようにな
り、また150重量部より多くなると塗料粘度が上昇して
塗装作業性が悪くなると共に、得られる塗膜の強度が低
下する等の欠点が生じるようになる。It is preferable to use a sintered porous material as the diatomaceous earth. The content of this diatomaceous earth is
When the amount is less than 50 parts by weight based on 100 parts by weight of the resin solid content of the emulsion, the carbonic acid preventing effect and the moisture permeability become inferior, and when the amount is more than 150 parts by weight, the paint viscosity increases and the coating workability deteriorates. As a result, disadvantages such as a decrease in the strength of the obtained coating film occur.
本発明においては、前記エマルジョンとこのケイソウ
土が組み合わされて、得られる塗膜に好ましい炭酸化度
特性と透湿度特性を付与するための塗料バインダーとな
る。In the present invention, the emulsion and the diatomaceous earth are combined to form a paint binder for imparting preferable carbonation degree characteristics and moisture permeability characteristics to the obtained coating film.
前記顔料体積濃度（PVC）とは、ケイソウ土と必要に
応じて加えられる顔料（着色顔料と体質顔料）との合計
量の本塗料組成物中における割合である。このPVCが30
％より小さい場合、得られる塗膜の透湿性が悪くなり、
またPVCが50％より大きい場合、透湿性には優れるよう
になるが、塗膜強度が低下するようになる。The pigment volume concentration (PVC) is a ratio of the total amount of diatomaceous earth and pigments (color pigment and extender) added as needed in the present coating composition. This PVC is 30
%, The resulting coating film has poor moisture permeability,
When PVC is more than 50%, the moisture permeability becomes excellent, but the strength of the coating film decreases.
本発明の塗料組成物には、上記樹脂エマルジョンとケ
イソウ土の必須成分の他に、塗料成分として一般的に使
用されている分散剤、消泡剤、防腐剤、増粘剤、造膜助
剤等の添加剤を適宜加え、更に必要に応じて所望の色調
を得るための着色顔料及び体質顔料を加える。そして、
この混合物を通常の塗料分散機で分散して製造する。In the coating composition of the present invention, in addition to the essential components of the resin emulsion and diatomaceous earth, a dispersant, a defoaming agent, a preservative, a thickener, and a film-forming auxiliary generally used as coating components are included. And the like, and if necessary, a coloring pigment and an extender for obtaining a desired color tone. And
This mixture is dispersed in a conventional paint dispersing machine to produce the mixture.
本発明の塗料組成物は、スプレー塗装、ローラー塗
装、刷毛塗り等の任意の方法により無機質建材等に塗装
する。この塗布量は、少ない場合、結露防止効果が得ら
れても、逆に炭酸化防止効果は不充分になることがあ
る。また、多い場合、炭酸化防止効果は得られても結露
が生ずる虞れがある。従って、適切な塗布量は、組成に
もよるが、300〜1000g/m2の範囲内とするのが好まし
い。The coating composition of the present invention is applied to an inorganic building material or the like by any method such as spray coating, roller coating, or brush coating. When the coating amount is small, the effect of preventing carbonation may be insufficient even if the effect of preventing condensation is obtained. In addition, when the amount is large, dew condensation may occur even if the effect of preventing carbonation is obtained. Therefore, the appropriate coating amount depends on the composition, but is preferably in the range of 300 to 1000 g / m 2 .
本発明の塗装方法は、気泡コンクリート、コンクリー
ト、モルタル、その他のセメント系無機質建材であっ
て、炭酸化を防止する必要のあるものに対して適用する
ことができる。The coating method of the present invention can be applied to cellular concrete, concrete, mortar, and other cement-based inorganic building materials that need to prevent carbonation.
［実施例］ 実施例１ 樹脂エマルジョン、ケイソウ土、二酸化チタン（Ti
O2）、炭酸カルシウム（CaCO3）、添加剤及び水の各成
分を下記に示す重量比で混合して各実施例に係る塗料組
成物を製造した。但し、樹脂エマルジョンとして、実施
例１では酢酸ビニル−アクリル共重合樹脂エマルジョン
〔モビニール662（商品名）、ヘキスト合成（株）製〕
を使用した。この添加剤は、増粘剤（ヒドロキシエチル
セルロース）２重量部、分散剤〔デモールEP（商品
名）、花王アトラス（株）製〕３重量部、造膜助剤〔テ
キサノール（商品名）、ダイセル化学工業（株）製〕20
重量部、消泡剤〔ノプコ8034（商品名）、サンノプコ
（株）製〕５重量部の割合で混合したものを使用した。[Example] Example 1 Resin emulsion, diatomaceous earth, titanium dioxide (Ti
O 2 ), calcium carbonate (CaCO 3 ), additives and water were mixed in the following weight ratios to produce coating compositions according to the examples. However, in Example 1, a vinyl acetate-acrylic copolymer resin emulsion [Movinyl 662 (trade name), manufactured by Hoechst Gosei Co., Ltd.] was used as the resin emulsion.
It was used. This additive includes 2 parts by weight of a thickener (hydroxyethylcellulose), 3 parts by weight of a dispersant [Demol EP (trade name), manufactured by Kao Atlas Co., Ltd.], a film forming aid [Texanol (trade name), Daicel Chemical Co. Industrial Co., Ltd.] 20
The mixture was used in a ratio of 5 parts by weight to 5 parts by weight of an antifoaming agent [Nopco 8034 (trade name), manufactured by San Nopco Co., Ltd.].
塗料組成物の成分 樹脂（固形分） …20wt％ TiO2 …10wt％ ケイソウ土 …18wt％ CaCO3 … 5wt％ 添加剤 … 4wt％ 水 …43wt％ 〔顔料体積濃度（PVC）…40％〕 比較例1,2 上記実施例と同様の成分及び含量比を有する比較例1,
2に係る塗料組成物を製造した。但し、樹脂エマルジョ
ンとして、比較例１ではアクリル樹脂エマルジョン〔プ
ライマルAC−22（商品名）、ローム・アンド・ハース・
ジャパン（株）製〕、比較例２ではスチレン−アクリル
共重合樹脂エマルジョン〔アクロナールYJ−1650D（商
品名）、三菱油化バーディッシュ（株）製〕を使用し
た。Ingredients of coating composition Resin (solid content) 20 wt% TiO 2 10 wt% Diatomaceous earth 18 wt% CaCO 3 5 wt% Additive 4 wt% Water 43 wt% Pigment volume concentration (PVC) 40% Comparative example 1,2 Comparative Example 1, having the same components and content ratio as in the above Example
The coating composition according to No. 2 was produced. However, in Comparative Example 1, an acrylic resin emulsion [Primal AC-22 (trade name), Rohm and Haas
Japan Co., Ltd.] and Comparative Example 2 used a styrene-acrylic copolymer resin emulsion [Acronal YJ-1650D (trade name), manufactured by Mitsubishi Yuka Birdish Co., Ltd.].
上記組成を有する実施例１及び比較例1,2に係る塗料
組成物について、次の測定方法により炭酸化度と透湿度
を測定した。その結果を下記の表−１に示す。For the coating compositions according to Example 1 and Comparative Examples 1 and 2 having the above composition, the degree of carbonation and the moisture permeability were measured by the following measurement methods. The results are shown in Table 1 below.
炭酸化度の測定方法 a.炭酸化が進行していない軽量気泡コンクリート片（70
×70×40mm程度）を用いて、このコンクリート片の１面
（70×70mm）に各実施例の塗料組成物を塗り、他の５面
はエポキシ樹脂でシールする。この際の塗布量は、500g
/m2とする。Measurement method of carbonation degree a. Light-weight cellular concrete pieces (70
(× 70 × 40 mm) using one of the concrete pieces (70 × 70 mm) with the coating composition of each example, and the other five surfaces are sealed with epoxy resin. The amount of application at this time is 500 g
/ m 2 to.
b.温度20℃、相対湿度60％、炭酸ガスフリーの雰囲気で
供試体の含水率を平衡させる。b. Equilibrate the water content of the specimen in a 20 ° C temperature, 60% relative humidity, and carbon dioxide-free atmosphere.
c.温度20℃、相対湿度60％、炭酸ガス濃度10％の雰囲気
に供試体を置き、１週間暴露する。c. Place the specimen in an atmosphere at a temperature of 20 ° C, a relative humidity of 60% and a carbon dioxide concentration of 10%, and expose for one week.
d.供試体の塗布面から１〜2cmの部位を採取し、炭酸化
度を測定する。この炭酸化度の測定方法としては、i.フ
ェノールフタレインを使用した定性的分析方法、ii.炭
酸カルシウムの回折線の強度を測定するＸ線回折法、ii
i.炭酸塩を塩酸で分解して生じた炭酸ガスによる圧力上
昇を水銀マノメータで測定する方法、等を任意に使用す
ることができる。d. A portion of 1 to 2 cm from the coated surface of the specimen is collected and the degree of carbonation is measured. Examples of the method of measuring the degree of carbonation include: i. A qualitative analysis method using phenolphthalein; ii. An X-ray diffraction method for measuring the intensity of diffraction lines of calcium carbonate;
i. A method of measuring a pressure rise due to carbon dioxide gas generated by decomposing a carbonate with hydrochloric acid using a mercury manometer or the like can be arbitrarily used.
透湿度の測定方法 a.コンクリート片（15×15×20mm程度）の１面（15×15
mm）に各実施例の塗料組成物を塗り、他の５面はエポキ
シ樹脂でシールする。この際の塗布量は、500g/m2とす
る。Measurement method of moisture permeability a. One side of concrete piece (about 15 × 15 × 20mm) (15 × 15
mm), the coating composition of each example is applied, and the other five surfaces are sealed with an epoxy resin. The coating amount at this time is 500 g / m 2 .
b.温度20℃、相対湿度60％の雰囲気で供試体の含水率を
平衡させる。b. Equilibrate the water content of the specimen in an atmosphere at a temperature of 20 ° C and a relative humidity of 60%.
c.温度20℃、相対湿度90％の雰囲気で供試体を置き、１
週間暴露する。c. Place the specimen in an atmosphere at a temperature of 20 ° C and a relative humidity of 90%.
Expose for a week.
d.経時的に供試体の重量を測定し、その重量変化から透
湿度を測定する。d. Measure the weight of the specimen over time, and measure the moisture permeability from the change in the weight.
この表−１より、樹脂エマルジョンとして酢酸ビニル
−アクリル共重合樹脂エマルジョン（実施例１）を使用
した塗料組成物は、アクリル樹脂エマルジョン等を使用
した比較例1,2に係る塗料組成物と比べて、炭酸化度及
び透湿度のいずれの点でも優れた特性を有していること
がわかる。 From Table 1, the coating composition using the vinyl acetate-acrylic copolymer resin emulsion (Example 1) as the resin emulsion was compared with the coating compositions according to Comparative Examples 1 and 2 using the acrylic resin emulsion and the like. It can be seen that they have excellent characteristics in any of carbonation degree and moisture permeability.
比較例３〜５ 上記実施例１と同じ成分を含有するが、樹脂、ケイソ
ウ土等の重量比、PVCの割合については下記の表−２に
示すように異ならせた比較例３〜５に係る塗料組成物を
製造し、上記実施例と同様に炭酸化度と透湿度を測定し
た。その結果を表−２に併せて示す。Comparative Examples 3 to 5 Comparative Examples 3 to 5 containing the same components as in Example 1 above, but differing in the weight ratio of resin, diatomaceous earth, and the like, as shown in Table 2 below. A coating composition was prepared, and the degree of carbonation and the moisture permeability were measured in the same manner as in the above examples. The results are shown in Table-2.
表−２より、比較例３によれば、ケイソウ土の含有割
合が本発明に規定される範囲より少ないため、炭酸化防
止効果は得られても、透湿度に関しては不良である。ま
た、比較例４によれば、ケイソウ土の含有割合が本発明
に規定する範囲より多くなっているため、炭酸化防止効
果と透湿度の両者には優れていても、塗膜の強度が弱
く、脆いという欠点がある。比較例５によれば、PVCが
本発明に係る範囲より大きいため、透湿度は良好であっ
ても、炭酸化防止効果については不良であることがわか
る。 From Table 2, according to Comparative Example 3, since the content of diatomaceous earth is less than the range specified in the present invention, the effect of preventing carbonation is obtained, but the moisture permeability is poor. Further, according to Comparative Example 4, since the content of diatomaceous earth was larger than the range specified in the present invention, the strength of the coating film was weak even if both the carbonation preventing effect and the moisture permeability were excellent. Fragile. According to Comparative Example 5, since the PVC is larger than the range according to the present invention, it can be seen that even if the moisture permeability is good, the effect of preventing carbonation is poor.
従って、本実施例に係る塗料組成物を内装塗料として
用いた、例えば軽量気泡コンクリートパネルは、炭酸ガ
スの透過性が低いため、炭酸化の進行に伴う、空隙率の
減少、乾燥収縮の増大、ひび割れの発生等を抑えること
ができる。これに加えて、水蒸気の透過性が高いため、
冬期や梅雨期においても、壁の表面結露が生じることが
なくなり、衛生上、美観上及び耐久性の点で良好であ
る。Therefore, using the coating composition according to this example as an interior coating, for example, a lightweight cellular concrete panel has low permeability of carbon dioxide gas, with the progress of carbonation, a decrease in porosity, an increase in drying shrinkage, The occurrence of cracks and the like can be suppressed. In addition, due to the high water vapor permeability,
Even during the winter season and the rainy season, dew condensation on the wall surface does not occur, which is good in terms of hygiene, aesthetics, and durability.
また、通常のコンクリート用の塗料として使用した場
合には、炭酸化の進行に伴うコンクリートの中性化が抑
えられるため、鋼材が錆びて体積が膨張し、これによっ
てコンクリート自体が破壊されるという問題点を解決す
ることができる。In addition, when used as a paint for ordinary concrete, the carbonation of concrete due to the progress of carbonation is suppressed, and the steel material rusts and expands in volume, which destroys the concrete itself. The point can be solved.
［発明の効果］ 本発明によれば、炭酸ガスの透過性が低く、かつ水蒸
気の透過性が高い塗料組成物が得られるため、セメント
系無機質建材の炭酸化防止及び結露防止のための塗料と
して有用である。[Effects of the Invention] According to the present invention, a coating composition having low permeability of carbon dioxide gas and high permeability of water vapor can be obtained, so that it is used as a coating for preventing carbonation and dew condensation of cement-based inorganic building materials. Useful.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松尾 一臣 群馬県邑楽郡千代田町大字昭和千代田工 業団地内 ミサワセラミックケミカル株 式会社内 (72)発明者 山田 和夫 栃木県佐野市栄町12―１ 藤倉化成株式 会社内 (56)参考文献 特開 平１−225676（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) C09D 5/00 - 5/02 C09D 131/00 - 131/04 C09D 133/00 - 133/16 C04B 41/63 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kazuomi Matsuo In Chiyoda-cho, Gunma-pref. Fujikura Kasei Co., Ltd. (56) References JP-A-1-225676 (JP, A) (58) Field surveyed (Int. Cl. 6 , DB name) C09D 5/00-5/02 C09D 131/00- 131/04 C09D 133/00-133/16 C04B 41/63
Claims (1)
ョンとケイソウ土とを含有し、含有割合を前記樹脂エマ
ルジョンの固形分100重量部に対して前記ケイソウ土を5
0〜150重量部とし、かつケイソウ土を含む顔料体積濃度
を30〜50％としたことを特徴とする塗料組成物。A diatomaceous earth containing a vinyl acetate-acrylic copolymer resin emulsion and diatomaceous earth in a content of 100 parts by weight of the solid content of the resin emulsion.
A coating composition comprising 0 to 150 parts by weight and a pigment concentration including diatomaceous earth of 30 to 50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9108090A JP2909540B2 (en) | 1990-04-04 | 1990-04-04 | Paint composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9108090A JP2909540B2 (en) | 1990-04-04 | 1990-04-04 | Paint composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03287671A JPH03287671A (en) | 1991-12-18 |
| JP2909540B2 true JP2909540B2 (en) | 1999-06-23 |
Family
ID=14016536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9108090A Expired - Lifetime JP2909540B2 (en) | 1990-04-04 | 1990-04-04 | Paint composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2909540B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002138252A (en) * | 2000-11-02 | 2002-05-14 | Takatoshi Fujino | Diatomaceous earth-containing coating material composition |
| KR101259773B1 (en) * | 2012-12-26 | 2013-05-02 | 정민상 | Water-soluble paint composition for interior wall of buildings |
-
1990
- 1990-04-04 JP JP9108090A patent/JP2909540B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03287671A (en) | 1991-12-18 |
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