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JP3597264B2 - Base adjuster composition - Google Patents
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JP3597264B2 - Base adjuster composition - Google Patents

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Publication number
JP3597264B2
JP3597264B2 JP21601195A JP21601195A JP3597264B2 JP 3597264 B2 JP3597264 B2 JP 3597264B2 JP 21601195 A JP21601195 A JP 21601195A JP 21601195 A JP21601195 A JP 21601195A JP 3597264 B2 JP3597264 B2 JP 3597264B2
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Prior art keywords
base
urethane
material layer
composition
epoxy resin
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JP21601195A
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JPH0959051A (en
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田 謙 一 坪
戸 隆 則 城
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Yokohama Rubber Co Ltd
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Yokohama Rubber Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04Portland cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482Coating or impregnation materials
    • C04B2111/00491Primers

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、建物の屋根に防水材を施工する際に、モルタル製、コンクリート製等の下地材と樹脂製の防水材との中間に用いて、防水材のふくれや剥離を防止する下地調整材組成物に関する。
【0002】
【従来の技術】
工場や一般の建築物等の屋上(屋根)は、施工後外気に曝されるため、防水性、耐候性が要求され、さらにその建築物の外観の一部をなすために、意匠性が要求されることが多い。そのため、このような屋上をモルタル製やコンクリート製の無機材で施工する場合、通常、表面を防水材で被覆する。例えば、この防水材として、ウレタン系樹脂を被覆する方法があり、具体的には、ウレタン系防水材の2液型のものを現場で混合、撹拌した後、塗布する方法、あるいは、最近では、1液型のものを塗布後、湿気で硬化させる方法が採られている。
【0003】
しかし、コンクリートなどの下地の上にこれらのウレタン系防水材を被覆した後硬化させると、表面にピンホールやふくれを生じる場合、あるいは、施工後、直射日光に曝されるため、防水材が下地材であるコンクリートから生じる水分を吸収して防水材層の表面にふくれが生じたり、防水材層の接着不良を起こす場合がある。
そこで、下地材層であるコンクリートと防水材層であるウレタン系防水材の中間にSBR,アクリル系,エチレンビニル酢酸共重合体などの水分散性のエマルジョン系樹脂と所謂セメントを混合した組成物を下地調整剤として介在させることによって、これらの問題点を解決しようとする試みがなされてきた。
例えば、特公平3−79494号公報では、トンネルや地下室等の建築構造物の床に用いる目的で、エポキシ系樹脂エマルジョンと水硬性セメントの混合物でコンクリート製の下地を調整した後、エポキシ樹脂塗床材で被覆する施工方法が記載されているが、この下地調整剤は床材の下地を調整するものであって、屋上の下地の調整のように耐候性を必要とするものに適しているとはいえない。
【0004】
【発明が解決しようとする課題】
つまり、エマルジョン系樹脂とセメントからなる組成物を下地材層と防水材層の中間に介在させても、長期間には、ふくれや接着不良などを生じる場合がある。
そこで、本発明の目的は、このような防水材のふくれや接着不良などを生じず、長期間にわたって防水性、外観の意匠性を有する屋根を形成するための下地調整剤組成物を提供することにある。
【0005】
【課題を解決するための手段】
本発明者らは、これらの問題について鋭意検討した結果、下地材層であるコンクリート製の下地と、防水材層であるウレタン系樹脂防水材の中間に、エポキシ系樹脂とポルトランドセメントを1.0:1.0〜3.0の質量比で混合した下地調整剤を存在させると、ウレタン系樹脂防水材層の表面のふくれを改善し、下地材層と防水材層の接着性が向上することを見いだし、本発明に至った。
【0006】
すなわち、本発明は、防水材層であるウレタン系樹脂防水材と下地材層であるコンクリートの中間に用いる屋上用の下地調整剤組成物であって、エポキシ樹脂とポルトランドセメントを重量比で1.0:1.0〜3.0で混合してなる下地調整剤組成物を提供する。
【0007】
本発明の下地調整剤組成物は、建物の屋上の下地材層であるコンクリート製の下地と、防水材層であるウレタン系樹脂防水材の中間に用いて屋根の防水性を損なう原因となる下地の凹凸を調整するものであって、エポキシ系樹脂とポルトランドセメントを1.0:1.0〜3.0の質量比で含有する。
【0008】
本発明に用いるエポキシ樹脂は、ビスフェノールA型エポキシ樹脂、ビスフェノールF型エポキシ樹脂、ビスフェノールAD型エポキシ樹脂、ノボラック型エポキシ樹脂等が挙げられるが、中でも、液体または固体のビスフェノールA型エポキシ樹脂であるのが、接着性、耐発泡性の点で好ましい。具体的には、油化シェル(株)製の1001X75、828等の市販品を用いることができる。
エポキシ樹脂のエポキシ当量は、180〜500であるのが好ましい。
【0009】
本発明に用いるポルトランドセメントは、所謂セメントであってCaO,Al,SiOを主成分とする石灰質成分や粘度質成分などの粉体を適切な割合で混合したもので、水と反応して水和物を形成することによって硬化するセメントである。メサライト、アサノライト、エフェイライト等の人工軽量骨材を重量比で、セメント:人工軽量骨材=1:1〜1:2の割合で加えるのが、軽量性と強度とのバランスの点で好ましい。
【0010】
エポキシ樹脂:ポルトランドセメントの配合比は、質量比で1.0:1.0〜3.0、特に1.0:1.0〜1.5であるのが好ましい。エポキシ樹脂に対するポルトランドセメントの混合比が、1.0:1.0未満では、発泡性、下地との接着性が悪く、1.0:3.0超では、作業性の点で好ましくない。
【0011】
本発明の下地調整剤組成物には、エポキシ樹脂とポルトランドセメントの他に、本発明の主旨に適する範囲で、その他の添加剤を含有させてもよい。その他の添加剤としては、溶剤、硬化剤、消泡剤、硬化助剤、着色剤、難燃剤、防かび剤、触媒などが挙げられる。
本発明に用いる硬化剤としては、エポキシ樹脂用硬化剤であって、芳香族環または脂環式環を有し、耐アルカリ性に優れる硬化剤であればよく、例えば、3,9−ビス(3−アミノプロピル)−2,4,8,10−テトラスピロ[5.5]ウンデカン(ATU)複素環式アミン系硬化剤、メタキシリレンジアミン(MXDA)のマンニッヒ型硬化剤、イソホロンジアミンのマンニッヒ型硬化剤(IPDA)、アダクト型硬化剤などが挙げられ、中でも、MXDAのマンニッヒ型硬化剤、ATUを用いるのが、耐アルカリ性の点で好ましい。また、市販品である旭電化社製のEH−230、油化シェル(株)製のエポメートS002等を使用することもできる。
硬化剤の含有量は、エポキシ樹脂100重量部に対して、40〜200重量部、特に100〜150重量部であるのが硬化実現の点で好ましい。
【0012】
溶剤としては、例えば、フェノール、クレーゾール、アルキルグリシジルエーテル、1,6−ヘキサンジオールジグリシジルエーテル等が挙げられ、中でもフェノールが硬化を促進できるので好ましい。
溶剤の含有量は、下地調整剤組成物からポルトランドセメントを除いたエポキシ樹脂組成物中、30〜40重量%含有させるのが好ましい。低温時の接着性及びウレタン塗膜の発泡性の点で40重量%以下であるのが好ましく、粘度上昇による作業性の点で30重量%以上であるのが好ましい。
【0013】
添加剤としては、例えば、消泡剤、硬化助剤、着色剤、難燃剤、防かび剤、触媒等が挙げられる。消泡剤としては、オクチルアルコール、シクロヘキサノール、エチレングリコール、シリコーンエマルジョン、リン酸トリブチル、2−エチルヘキシルアルコール等が挙げられ、中でもアクリル系、ビニル系のものが好ましい。硬化助剤としては、N−β(アミノエチル)γ−アミノプロピルトリメトキシシラン、クロロプロピルトリメトキシシラン、ビニルトリクロロシラン、γ−アミノプロピルトリエトキシシラン、γ−メルカプトプロピルトリメトキシシラン、γ−メタクリロキシプロピルトリメトキシシラン等のシラン系カップリング剤が挙げられ、中でもアミノシラン系カップリング剤が好ましい。着色剤としては、チタンホワイト、カーボンブラック等が挙げられる。難燃剤としては、リン酸トリクレシル、塩素化パラフィン、三酸化アンチモン等が挙げられる。防かび剤としては、o−フェニルフェノール、テトラメチルチウレムジスルフィド等が挙げられる。触媒、接着付与剤として、ジメチルアニリン、ベンジルジメチルアミン、2−(ジメチルアミノメチル)フェノール、2,4,6−トリス(ジアミノメチル)等の三級アミンが用いられる。
【0014】
本発明の下地調整剤組成物の製造方法の1例としては、上述のエポキシ樹脂とポルトランドセメントを配合し、必要に応じて、溶剤等の添加剤を加えて充分混練し、施工時に硬化剤を加えて使用すればよい。その他の添加剤は、エポキシ樹脂に加えても、または硬化剤に加えてもよい。
得られる下地調整剤組成物の粘度は、200〜1000cps(25℃)であるのが好ましい。
【0015】
図1に、本発明の下地調整剤組成物を用いた防水施工法によって得られた屋上防水構造体1の構成の1例を防水材塗布面から下地方向に垂直に切った断面図で示して説明する。
図1で示されるとおり、屋上防水構造体1は、下地材からなる下地材層2、防水材からなる防水材層5の中間に、少なくとも、下地調整剤層3を存在する。さらに、下地調整剤層3と防水材層5との間にウレタン系樹脂プライマーからなるプライマー層4が存在するのが好ましい。
下地材層2は、下地となるコンクリートからなり、建築用のセメント、セメントモルタル等に水を添加して混練した後、成形して硬化させたもので、通常の建築用に用いられるセメントやモルタルであればいずれの成分配合のものでもよい。このコンクリートの下地材層2の表面には、凸凹が生じることがある。この凸凹があると、コンクリート製の下地材層2を防水材で被覆しても、防水材が硬化した後に防水材の表面にピンホールやふくれが生じる場合がある。
【0016】
下地調整剤層3は、本発明の下地調整剤組成物からなり、上記の下地材層2の建築物の外側になる側の表面に塗布して、下地に生じた凸凹やピンホールを平滑に調整する。したがって、本発明の下地調整剤組成物は、下地材層2の凸凹の影響を防水材層5に与えず、かつ、下地から生じる水分を吸収して防水材層5に水分が達するのを抑えることで、防水材層5のふくれを防止することができる。
本発明の下地調整剤組成物からなる下地調整剤層は、0.5〜2.0mmの厚さに塗布するのが好ましい。
【0017】
プライマー層4は、ウレタン系樹脂プライマー組成物からなり、本発明の下地調整剤からなる層と防水材層との間に必要に応じて形成される。プライマーは、0.1〜0.5mmの厚みで塗布するのが好ましい。
ウレタン系樹脂プライマー組成物は、建築物に通常使用されるウレタン系樹脂プライマーであれば、1液型であっても2液型であってもよく、例えば、MDI,TDIなどのイソシアネートとPPGなどのポリオールとを反応させて得られる末端にNCO基を有するウレタンプレポリマー(粘度100〜1000cps)、または、イソシアネートとポリオールに、アミン系触媒を加えて反応させた分子量50〜1000のポリウレタン樹脂またはアダクトポリイソシアネートを含有し、必要に応じてキシレン、トルエン等の溶剤をポリウレタン樹脂100重量部に対して10〜80重量部含有していてもよい。また、汎用のウレタン系樹脂のプライマーなどの市販品を使用してもよい。
【0018】
防水材層5は、直接あるいはウレタン系樹脂のプライマー層4を介して下地調整剤層2を被覆し、硬化後水または水蒸気を透過させない層を形成するウレタン樹脂組成物からなり、0.5〜3.5mmの厚みで塗布するのが好ましい。
防水材は、通常使用されるウレタン系樹脂の防水材であれば1液型ものでも2液型のものでもよく、例えば、MDI,TDIなどのイソシアネートとPPGなどのポリオールとを反応させて得られる末端にNCO基を有するウレタンプレポリマー100重量部に対して0.5×10−3〜2.0×10−3モルのイソシアネートを含有するポリウレタン組成物であり(粘度50〜150cps)、または、イソシアネートとポリオールに、アミン系触媒を加えて反応させた分子量100〜10000、好ましくは分子量500〜5000のポリウレタン樹脂を含有し、必要に応じてキシレン、トルエン等の溶剤をポリウレタン樹脂100重量部に対して100重量部以下含有していてもよい。また、汎用のウレタン系樹脂の屋上用の防水材(溶剤(トルエン、キシレン、ミネラルスピリット等)3〜10重量%を含有)などの市販品を使用してもよい。さらに、防水材には、ウレタン樹脂にカーボンブラック、酸化チタン、シスアゾ系オレンジ、シアニンブルーなどの着色剤を添加してもよい。
【0019】
本発明の下地調整剤組成物を用いた防水施工法の1例としては、図1に示すとおり、コンクリート等の下地を施工し、乾燥させた下地材層2の建築物の屋外になる側の面に、本発明の下地調整剤組成物を塗布し、さらにその上に必要に応じてプライマー組成物を塗布してから、あるいは、下地調整剤組成物の上に直接防水材を塗布して、硬化させ屋上防水構造体1を得る。
【0020】
本発明の下地調整剤組成物は、水分や溶剤が残っているコンクリート製の下地との接着性に優れ、同時に溶剤を含むウレタン系樹脂プライマーやウレタン系樹脂防水材との接着性にも優れているので、この下地調整剤組成物を用いれば、長期間、防水性、耐候性、外観の意匠性に優れた屋上用防水施工をすることができる。
【0021】
【実施例】
以下に、実施例により、本発明を具体的に説明する。
(実施例1〜2、および比較例1〜4)
セメント:水:骨材の重量比が1:1:1.5のコンクリート(人工軽量骨材(メサライト)含有)を、縦30cm、横30cm、厚さ7cmとなるよう成形して、約1ヶ月(20〜25℃、60%〜70%RH)養生させ、コンクリートの含水率7%に乾燥させてから、下記表2に示される組成のエポキシ樹脂組成物にポルトランドセメントを質量比で1:1.5加えた下地調整剤組成物をコンクリート板の一方の面に塗布し、その上に、ウレタン系樹脂プライマー組成物(溶剤(トルエン、キシレン)70重量%含有)を塗布してから上塗材として、1液型ウレタン系樹脂防水材(ハマタイト社製のユーロポール:溶剤(トルエン)9重量%含有)あるいは2液型ウレタン系樹脂防水材(横浜ゴム(株)製のU−8000:溶剤(ミネラルスピリット)3重量%含有)を塗布してコンクリート表面が50〜60℃になるように照射して得た各試験片について、防水層の発泡の有無、下地と防水材間の接着性の確認を行った。
比較例1、2は、下地調整剤として、エマルジョン系樹脂を用いた以外は、実施例1および2と同様にして試験片を得た。比較例3は、表1に示されるとおり、下地層の上に下地調整剤として、エポキシ樹脂系エマルジョンとセメントとの混合物を塗布し、その上にエポキシ樹脂系床材を塗布して試験片を得た。比較例4は、表1に示されるとおり、下地層の上に下地調整剤として、エポキシ樹脂系エマルジョンとセメントとの混合物を塗布し、その上にウレタン系プライマー、ウレタン系防水材を塗布して試験片を得た。
【0022】
次に、各試験片を50℃温水中に浸漬して、14日後のふくれ、下地と防水層間の接着性を観察した。以下の評価規準により、ふくれを評価し、表1に記載した。
【0023】
(ふくれの評価基準)
試験片30×30cm中に、
◎……全くふくれなし(0ケ)。
○……一部ふくれ(1〜3ケ)あり。
×……全面にふくれ(多数)あり。
【0024】
また、接着性は、手剥離試験を行った。以下の評価規準により、接着性を評価し、表1に記載した。(接着性の評価基準)
◎……層間剥離なし。
○……約10%層間剥離あり。
×……50%以上の層間剥離あり。
【0025】
また、耐候性は、サンシャインウェザーメーター(東洋精機製)を用い、雰囲気温度63±3℃、スプレーサイクル120分中18分で2500hrs暴露によって測定した。以下の評価規準により、耐候性を評価し、表1に記載した。
(耐候性の評価基準)
◎……変化なし。
○……多少黄変。
×……黄変およびチョーキングが激しい。
【0026】
【表1】

Figure 0003597264
【0027】
Figure 0003597264
【0028】
注)各成分の量は、重量部を示す。
エポキシ樹脂:液体ビスフェノールA型エポキシ樹脂
(エポキシ当量450〜500)
複素環式アミン:油化シェル(株)製のエポメートS002
アミノシラン:日本ユニカー(株)製のアミノシランカップリング剤
【0029】
【発明の効果】
本発明の下地調整剤組成物によれば、屋上の屋根のような直射日光や風雨に曝される所でも、十分な防水性、耐候性を示し、長期間使用しても防水材の表面にふくれや剥離を生じない防水施工を行うことができる。
【図面の簡単な説明】
【図1】本発明の下地調整剤組成物を用いた屋上用の防水構造体の断面図である。
【符号の説明】
1 屋上防水構造体
2 下地材層
3 下地調整剤層
4 プライマー層
5 防水材層[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a base adjustment material for preventing a swelling or peeling of a waterproof material when the waterproof material is applied to a roof of a building, which is used between a base material such as mortar or concrete and a resin waterproof material. Composition.
[0002]
[Prior art]
Roofs (roofs) of factories and general buildings are exposed to outside air after construction, so they are required to have waterproofness and weather resistance. In addition, design is required to form part of the appearance of the buildings. Often done. Therefore, when such a roof is constructed with a mortar or concrete inorganic material, the surface is usually covered with a waterproof material. For example, as this waterproofing material, there is a method of coating a urethane-based resin, specifically, a method of mixing and stirring a two-pack type urethane-based waterproofing material on site, and then applying, or recently, A method is adopted in which a one-pack type is applied and then cured with moisture.
[0003]
However, if these urethane-based waterproofing materials are coated on a base such as concrete and then cured, the surface may be exposed to pinholes or blisters, or after construction, exposed to direct sunlight. Absorption of water generated from concrete, which is a material, may cause blistering on the surface of the waterproof material layer or cause poor adhesion of the waterproof material layer.
Therefore, a composition obtained by mixing a so-called cement with a water-dispersible emulsion resin such as SBR, acrylic or ethylene-vinyl acetic acid copolymer in the middle of concrete as a base material layer and urethane-based waterproof material as a waterproof material layer. Attempts have been made to solve these problems by interposing as a base adjustment agent.
For example, in Japanese Patent Publication No. 3-79494, after a concrete base is adjusted with a mixture of an epoxy resin emulsion and hydraulic cement for the purpose of using the floor of a building structure such as a tunnel or a basement, an epoxy resin coated floor is used. Although the construction method of coating with a material is described, this ground conditioner adjusts the base material of the floor material, and is suitable for a material requiring weather resistance such as adjustment of a rooftop base material. I can't say.
[0004]
[Problems to be solved by the invention]
That is, even if the composition comprising the emulsion resin and the cement is interposed between the base material layer and the waterproof material layer, swelling and poor adhesion may occur for a long period of time.
Therefore, an object of the present invention is to provide a base conditioner composition for forming a roof having a waterproof property and an appearance design property for a long time without causing such a blister or poor adhesion of the waterproof material. It is in.
[0005]
[Means for Solving the Problems]
The present inventors have conducted intensive studies on these problems, and found that an epoxy resin and Portland cement were added between a concrete base as a base material layer and a urethane-based resin waterproof material as a waterproof material layer. : The presence of an undercoating agent mixed at a mass ratio of 1.0 to 3.0 improves blistering on the surface of the urethane resin waterproofing material layer and improves the adhesion between the undercoating material layer and the waterproofing material layer. And have led to the present invention.
[0006]
That is, the present invention relates to a roof conditioner composition for use between a urethane-based resin waterproofing material as a waterproofing material layer and concrete as a base material layer, wherein an epoxy resin and Portland cement are added in a weight ratio of 1. 0: 1.0 to 3.0 to provide a base conditioner composition mixed.
[0007]
The base conditioner composition of the present invention is used between a concrete base as a base material layer on a rooftop of a building and a urethane resin waterproofing material as a waterproofing material layer, and causes a deterioration in waterproofness of a roof. The epoxy resin and the Portland cement are contained at a mass ratio of 1.0: 1.0 to 3.0.
[0008]
The epoxy resin used in the present invention includes bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol AD type epoxy resin, novolak type epoxy resin and the like. Among them, liquid or solid bisphenol A type epoxy resin is used. Is preferable in terms of adhesiveness and foam resistance. Specifically, commercially available products such as 1001X75, 828 manufactured by Yuka Shell Co., Ltd. can be used.
The epoxy equivalent of the epoxy resin is preferably from 180 to 500.
[0009]
The Portland cement used in the present invention is a so-called cement, which is a mixture of powders such as a calcareous component and a viscous component containing CaO, Al 2 O 3 and SiO 2 as main components at an appropriate ratio, and reacts with water. Is a cement that hardens by forming hydrates. The addition of artificial lightweight aggregates such as mesalite, asanolite and efelite at a weight ratio of cement: artificial lightweight aggregate = 1: 1 to 1: 2 is necessary in terms of balance between lightness and strength. preferable.
[0010]
The compounding ratio of epoxy resin: portland cement is preferably 1.0: 1.0 to 3.0, particularly preferably 1.0: 1.0 to 1.5 by mass ratio. If the mixing ratio of the Portland cement to the epoxy resin is less than 1.0: 1.0, the foaming property and the adhesion to the substrate are poor. If the mixing ratio is more than 1.0: 3.0, the workability is not preferable.
[0011]
The base conditioner composition of the present invention may contain other additives in addition to the epoxy resin and the Portland cement within a range suitable for the gist of the present invention. Examples of other additives include a solvent, a curing agent, an antifoaming agent, a curing aid, a coloring agent, a flame retardant, a fungicide, and a catalyst.
The curing agent used in the present invention is a curing agent for an epoxy resin, and may be any curing agent having an aromatic ring or an alicyclic ring and having excellent alkali resistance, such as 3,9-bis (3 -Aminopropyl) -2,4,8,10-tetraspiro [5.5] undecane (ATU) heterocyclic amine-based curing agent, Mannich-type curing agent of meta-xylylenediamine (MXDA), Mannich-type curing of isophoronediamine Agent (IPDA), an adduct-type curing agent, and the like. Among them, the use of MXDA Mannich-type curing agent and ATU is preferable from the viewpoint of alkali resistance. In addition, commercially available products such as EH-230 manufactured by Asahi Denka Co., Ltd. and Epomate S002 manufactured by Yuka Shell Co., Ltd. can also be used.
The content of the curing agent is preferably from 40 to 200 parts by weight, particularly preferably from 100 to 150 parts by weight, based on 100 parts by weight of the epoxy resin, from the viewpoint of achieving the curing.
[0012]
Examples of the solvent include phenol, cresol, alkyl glycidyl ether, 1,6-hexanediol diglycidyl ether, and the like. Among them, phenol is preferred because it can promote curing.
The content of the solvent is preferably 30 to 40% by weight in the epoxy resin composition obtained by removing Portland cement from the base conditioner composition. The content is preferably 40% by weight or less from the viewpoint of adhesiveness at low temperature and the foaming property of the urethane coating film, and is preferably 30% by weight or more from the viewpoint of workability due to increase in viscosity.
[0013]
Examples of the additive include an antifoaming agent, a curing aid, a coloring agent, a flame retardant, a fungicide, and a catalyst. Examples of the antifoaming agent include octyl alcohol, cyclohexanol, ethylene glycol, silicone emulsion, tributyl phosphate, 2-ethylhexyl alcohol and the like, and among them, acrylic and vinyl type are preferable. As a curing aid, N-β (aminoethyl) γ-aminopropyltrimethoxysilane, chloropropyltrimethoxysilane, vinyltrichlorosilane, γ-aminopropyltriethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-methacrylic Examples thereof include silane coupling agents such as roxypropyltrimethoxysilane, and among them, aminosilane coupling agents are preferable. Examples of the coloring agent include titanium white and carbon black. Flame retardants include tricresyl phosphate, chlorinated paraffin, antimony trioxide and the like. Examples of the fungicide include o-phenylphenol, tetramethylthiurem disulfide and the like. Tertiary amines such as dimethylaniline, benzyldimethylamine, 2- (dimethylaminomethyl) phenol, and 2,4,6-tris (diaminomethyl) are used as a catalyst and an adhesion promoter.
[0014]
As an example of the production method of the base conditioner composition of the present invention, the above-described epoxy resin and Portland cement are blended, and if necessary, an additive such as a solvent is added and sufficiently kneaded, and a curing agent is used at the time of construction. In addition, it may be used. Other additives may be added to the epoxy resin or to the hardener.
The viscosity of the obtained base conditioner composition is preferably from 200 to 1000 cps (25 ° C.).
[0015]
FIG. 1 is a cross-sectional view of an example of a configuration of a rooftop waterproof structure 1 obtained by a waterproofing method using the base conditioner composition of the present invention, which is cut perpendicularly to a base direction from a waterproof material application surface. explain.
As shown in FIG. 1, the rooftop waterproof structure 1 has at least a base layer 3 in the middle of a base material layer 2 made of a base material and a waterproof material layer 5 made of a waterproof material. Further, it is preferable that a primer layer 4 made of a urethane-based resin primer is present between the base adjustment agent layer 3 and the waterproof material layer 5.
The base material layer 2 is made of concrete as a base, and is formed by adding water to kneading cement, cement mortar, or the like, kneading the mixture, and then molding and hardening the cement or mortar used for ordinary building. Any component may be used. The surface of the concrete base material layer 2 may have irregularities. If the unevenness is present, even if the concrete base material layer 2 is covered with the waterproofing material, pinholes or blisters may be generated on the surface of the waterproofing material after the waterproofing material has hardened.
[0016]
The undercoat conditioner layer 3 is made of the undercoat conditioner composition of the present invention, and is applied to the surface of the undercoat material layer 2 on the outer side of the building to smooth out irregularities and pinholes formed on the undercoat. adjust. Therefore, the base conditioner composition of the present invention does not exert the influence of the unevenness of the base material layer 2 on the waterproof material layer 5 and also suppresses the water reaching the waterproof material layer 5 by absorbing the moisture generated from the base material. This can prevent the waterproof material layer 5 from bulging.
It is preferable that the base conditioner layer comprising the base conditioner composition of the present invention is applied to a thickness of 0.5 to 2.0 mm.
[0017]
The primer layer 4 is made of a urethane-based resin primer composition, and is formed as necessary between the layer of the present invention and the waterproof material layer. The primer is preferably applied in a thickness of 0.1 to 0.5 mm.
The urethane-based resin primer composition may be a one-pack type or a two-pack type, as long as it is a urethane-based resin primer usually used for a building, for example, an isocyanate such as MDI or TDI and PPG. Polyurethane resin having a molecular weight of 50 to 1000 or a urethane prepolymer having an NCO group at the terminal (viscosity of 100 to 1000 cps) or an isocyanate and a polyol obtained by reacting with an amine catalyst. It may contain a polyisocyanate and, if necessary, may contain a solvent such as xylene or toluene in an amount of 10 to 80 parts by weight based on 100 parts by weight of the polyurethane resin. A commercially available product such as a general-purpose urethane resin primer may be used.
[0018]
The waterproofing material layer 5 is formed of a urethane resin composition that covers the undercoat conditioner layer 2 directly or via the urethane-based resin primer layer 4 and forms a layer that does not transmit water or water vapor after curing. It is preferably applied with a thickness of 3.5 mm.
The waterproofing material may be a one-component type or a two-component type as long as it is a commonly used urethane resin waterproofing material. For example, the waterproofing material is obtained by reacting an isocyanate such as MDI or TDI with a polyol such as PPG. A polyurethane composition containing 0.5 × 10 −3 to 2.0 × 10 −3 mol of isocyanate with respect to 100 parts by weight of a urethane prepolymer having an NCO group at a terminal (viscosity of 50 to 150 cps), or Contains a polyurethane resin having a molecular weight of 100 to 10000, preferably 500 to 5,000, which is obtained by adding an amine catalyst to an isocyanate and a polyol, and optionally reacting a solvent such as xylene or toluene with respect to 100 parts by weight of the polyurethane resin. 100 parts by weight or less. A commercially available urethane-based resin such as a rooftop waterproof material (containing 3 to 10% by weight of a solvent (toluene, xylene, mineral spirit, etc.)) may be used. Further, a colorant such as carbon black, titanium oxide, cis-azo orange, or cyanine blue may be added to the urethane resin to the waterproof material.
[0019]
As an example of the waterproofing construction method using the foundation adjustment composition of the present invention, as shown in FIG. On the surface, apply the primer adjusting composition of the present invention, and further apply a primer composition as necessary thereon, or, or apply a waterproof material directly on the primer adjusting composition, The roof waterproof structure 1 is obtained by curing.
[0020]
The base conditioner composition of the present invention has excellent adhesiveness with a concrete base in which water or a solvent remains, and also has excellent adhesiveness with a urethane-based resin primer or a urethane-based waterproofing material containing a solvent. Therefore, the use of this base conditioner composition makes it possible to perform roofing waterproofing with excellent waterproofness, weather resistance, and appearance design for a long period of time.
[0021]
【Example】
Hereinafter, the present invention will be specifically described with reference to examples.
(Examples 1-2 and Comparative Examples 1-4)
Concrete (containing artificial lightweight aggregate (mesalite)) having a weight ratio of cement: water: aggregate of 1: 1: 1.5 is formed into a length of 30 cm, a width of 30 cm, and a thickness of 7 cm, for about one month. (20 to 25 ° C., 60% to 70% RH), cured and dried to a concrete moisture content of 7%, and then portland cement was added to the epoxy resin composition having the composition shown in Table 2 below at a mass ratio of 1: 1. The base adjuster composition thus added is applied to one surface of a concrete plate, and a urethane-based resin primer composition (containing 70% by weight of a solvent (toluene, xylene)) is applied thereon, and then used as a topcoat material. One-part urethane resin waterproofing material (Europol manufactured by Hamatite: containing 9% by weight of solvent (toluene)) or two-part urethane resin waterproofing material (U-8000 manufactured by Yokohama Rubber Co., Ltd .: solvent (Minera) For each test piece obtained by applying (spirit) (containing 3% by weight) and irradiating the concrete surface to 50 to 60 ° C., the presence or absence of foaming of the waterproof layer and the adhesion between the base and the waterproof material were checked. went.
In Comparative Examples 1 and 2, test pieces were obtained in the same manner as in Examples 1 and 2, except that an emulsion-based resin was used as the base adjustment agent. In Comparative Example 3, as shown in Table 1, a mixture of an epoxy resin emulsion and cement was applied as a base adjustment agent on a base layer, and an epoxy resin floor material was applied thereon, and a test piece was used. Obtained. In Comparative Example 4, as shown in Table 1, a mixture of an epoxy resin-based emulsion and cement was applied as a base adjustment agent on a base layer, and a urethane-based primer and a urethane-based waterproofing material were applied thereon. A test piece was obtained.
[0022]
Next, each test piece was immersed in warm water at 50 ° C., and blistered 14 days later, and the adhesion between the base and the waterproof layer was observed. The blisters were evaluated according to the following evaluation criteria and are shown in Table 1.
[0023]
(Evaluation criteria for blistering)
In a test piece 30 × 30cm,
◎ …… No blistering (0).
○: Some blisters (1 to 3).
×: There are blisters (many) on the entire surface.
[0024]
The adhesion was measured by a hand peel test. The adhesiveness was evaluated according to the following evaluation criteria, and the results are shown in Table 1. (Adhesion evaluation criteria)
◎ …… No delamination.
…: About 10% delamination occurred.
×: 50% or more delamination occurred.
[0025]
The weather resistance was measured by using a sunshine weather meter (manufactured by Toyo Seiki Co., Ltd.) at an ambient temperature of 63 ± 3 ° C. and at a spray cycle of 120 minutes for 18 minutes at 2500 hrs. The weather resistance was evaluated according to the following evaluation criteria, and the results are shown in Table 1.
(Evaluation criteria for weather resistance)
◎ …… No change.
…: Somewhat yellowing.
×: severe yellowing and chalking
[0026]
[Table 1]
Figure 0003597264
[0027]
Figure 0003597264
[0028]
Note) The amount of each component indicates parts by weight.
Epoxy resin: liquid bisphenol A type epoxy resin (epoxy equivalent 450-500)
Heterocyclic amine: Epomate S002 manufactured by Yuka Shell Co., Ltd.
Aminosilane: Aminosilane coupling agent manufactured by Nippon Unicar Co., Ltd.
【The invention's effect】
According to the base conditioner composition of the present invention, even in a place exposed to direct sunlight or wind and rain, such as a rooftop roof, it shows sufficient waterproofness and weather resistance, and even when used for a long time, the surface of the waterproofing material Waterproof construction that does not cause blistering or peeling can be performed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a rooftop waterproofing structure using the base conditioner composition of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rooftop waterproof structure 2 Base material layer 3 Base adjustment agent layer 4 Primer layer 5 Waterproof material layer

Claims (1)

防水材層であるウレタン系樹脂防水材と下地材層であるコンクリートの中間に用いる屋上用の下地調整剤組成物であって、エポキシ樹脂とポルトランドセメントを質量比で1.0:1.0〜3.0で混合してなる下地調整剤組成物。This is a rooftop preparation composition for use between a urethane resin waterproofing material as a waterproofing material layer and concrete as a basement material layer, wherein the epoxy resin and Portland cement are in a mass ratio of 1.0: 1.0 to An undercoat conditioner composition mixed at 3.0.
JP21601195A 1995-08-24 1995-08-24 Base adjuster composition Expired - Fee Related JP3597264B2 (en)

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Country Link
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JP4780938B2 (en) * 2004-06-18 2011-09-28 日本ペイント株式会社 Concrete peeling prevention method
CN1923484B (en) 2006-09-14 2010-12-08 武汉理工大学 A kind of polymer concrete for rapid repair of airport runway and preparation method thereof
JP5526882B2 (en) * 2009-07-07 2014-06-18 横浜ゴム株式会社 Substrate conditioner composition
JP2011140828A (en) * 2010-01-08 2011-07-21 Hajime Watanabe High-strength resin paste, high-strength resin consolidated material, and method for constructing road surface using the same
JP6101524B2 (en) * 2013-03-18 2017-03-22 アイカ工業株式会社 Coating composition, floor construction method thereof, and floor structure thereby

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