JP3868059B2 - Waterproofing method using photo-curable prepreg sheet - Google Patents
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Description
【０００１】
【発明の属する技術分野】
本発明は、屋上あるいは床等の被防水下地の防水工法に関する。
【０００２】
【従来の技術】
従来、屋上や床等の被防水下地の防水には、アスファルト防水塗装や塩化ビニルシート等の張り付けが行われていたが、従来のアスファルト防水塗装や塩化ビニルシート等の張り付けの場合には機械的強度が低く、劣化が激しいために短期間で防水効果が損なわれ頻繁なメンテナンス作業を強いられるという問題点があった。一方、不飽和ポリエステル樹脂を、施工現場においてガラス繊維チョップドストランドマットに含浸して硬化成形することにより、被防水下地の表面に防水層を形成する工法も知られているが、この工法では優れた機械的強度を発揮できるものの、被防水下地に含まれる水分が、施工後温度上昇によって水蒸気と化して膨張し、防水層を押し上げ防水層に膨れを生じさせる問題点があった。また、同工法は施工現場において樹脂を硬化させるため、不飽和ポリエステル樹脂等の中のスチレンモノマー等揮発性物質が揮散することによる作業環境悪化の問題があった。
【０００３】
上記工法の問題点を解決すべく柔軟性ガラス繊維強化樹脂成形シートを用いた防水工法が特開平９−１１３７６号公報に開示されているが、この工法ではシート同士の接着をエポキシ系や不飽和ポリエステル系等の樹脂接着剤により固着する、あるいはシート間の目地を不飽和ポリエステル樹脂を含浸したガラス繊維で被覆硬化成形する必要があり、この為施工作業が繁雑となる欠点があった。
【０００４】
【発明が解決しようとする課題】
本発明の目的は、上記のような従来の防水工法の諸問題を解決して、作業現場におけるスチレンモノマーの揮散を抑制し、プリプレグシート同士の接着に接着剤を使用する必要が無く、かつ被防水下地の水分に関係なく施工ができる機械強度、耐候性に優れた防水工法を提供することにある。
【０００５】
【課題を解決するための手段】
すなわち、本発明は、次の通りである。
（１）光硬化性樹脂組成物を含浸させたプリプレグシートを被防水下地に被覆した後、光照射によって該プリプレグシートの硬化を行う防水工法であって、前記光硬化性樹脂組成物を含浸させたプリプレグシート同士の接着方法として、該プリプレグシートの一部を重ね合わせて圧着による仮接着を行った後、光照射によって該プリプレグシートの硬化を行うことでプリプレグシート同士を完全接着させることを特徴とする防水工法。
【０００６】
本発明に使用されるプリプレグシートとは、繊維強化材に光硬化性樹脂組成物を含浸させたものであって、光照射によって該プリプレグシートの硬化を行うことでプリプレグシート同士の接着が可能なものをいい、施工性の点からいわゆる半硬化状態のものであることが好ましい。本発明に使用される光硬化性樹脂組成物は、樹脂と光重合開始剤およびスチレンモノマー等のビニルモノマーからなるものであり、必要に応じて充填材、増粘剤、低収縮剤、難燃剤等が混合されていてもよい。
【０００７】
本発明に使用される光硬化性樹脂組成物の樹脂としては、例えば特開平８−３２８３６０号公報に開示されているような不飽和ポリエステルやビニルエステルなどが挙げられる。具体的に、不飽和ポリエステルとしては、活性不飽和結合を有しているジカルボン酸単独、又は活性不飽和結合を有していないジカルボン酸と併用したジカルボン酸を酸成分とし、多価アルコールをアルコール成分としてえられるものである。例えば活性不飽和結合を有していないジカルボン酸としては無水フタル酸、イソフタル酸、テレフタル酸、テトラヒドロフタル酸、アジピン酸、セバチン酸等が挙げられる。
【０００８】
活性不飽和結合を有しているジカルボン酸としては、フマル酸、マレイン酸、無水マレイン酸、イタコン酸等が挙げられる。また、多価アルコールとしては、例えばエチレングリコール、プロピレングリコール、ジエチレングリコール、ジプロピレングリコール、１，２−ブタンジオール、１，３−ブタンジオール、１，５−ペンタンジオール、１，６−ヘキサンジオール、２−メチル−１，３−プロパンジオール、２，２−ジメチル−１，３−プロパンジオール、シクロヘキサン−１，４−ジメチタノール、ビスフェノールＡのエチレンオキサイド付加物、ビスフェノールＡのプロピレンオキサイド付加物等の多価アルコールが挙げられる。
【０００９】
一方、具体的にビニルエステルとしては、エポキシ樹脂とアクリル酸またはメタクリル酸を成分として得られるエポキシ（メタ）アクリレート、あるいは飽和ジカルボン酸及び／又は不飽和ジカルボン酸と多価アルコールから得られる末端カルボキシル基のポリエステルにα、β−不飽和カルボンエステル基を含有するエポキシ化合物を反応させて得られるポリエステル（メタ）アクリレートである。
【００１０】
エポキシ樹脂としては、ビスフェノールＡジグリシジルエーテル及びその高分子量同族体、ノボラック型ポリグリシジルエーテル類等が挙げられる。飽和ジカルボン酸としては、活性不飽和基を有していないジカルボン酸、例えばフタル酸、イソフタル酸、テレフタル酸、テトラヒドロフタル酸、アジピン酸、セバチン酸等が挙げられる。不飽和ジカルボン酸としては、活性不飽和基を有しているジカルボン酸、例えばフマル酸、マレイン酸、無水マレイン酸、イタコン酸等が挙げられる。多価アルコールとしては、例えばエチレングリコール、プロピレングリコール、ジエチレングリコール、ジプロピレングリコール、１，２−ブタンジオール、１，３−ブタンジオール、１，５−ペンタンジオール、１，６−ヘキサンジオール、２−メチル−１，３−プロパンジオール、２，２−ジメチル−１，３−プロパンジオール、シクロヘキサン−１，４−ジメチタノール、ビスフェノールＡのエチレンオキサイド付加物、ビスフェノールＡのプロピレンオキサイド付加物等が挙げられる。
【００１１】
α、β−不飽和カルボン酸エステル基を含有するエポキシ化合物としては、グリシジルメタクリレートが代表例として挙げられる。本発明に用いられる光硬化性樹脂組成物の光重合開始剤としては、２００ｎｍ〜１２００ｎｍで活性な組成物であればなんら制限なく、公知のものが使用可能であり、紫外線、可視光および近赤外光の各領域で活性な重合開始剤の組み合わせたものが好ましい。
【００１２】
紫外線重合開始剤の代表的なものとしてベンゾフェノンまたは２，２−ジメトキシ−２−フェニルアセトフェノン等が挙げられ、可視光重合開始剤の代表的なものとしてベンジル、トリメチルベンゾイルジフェニルフォスフィンオキシド等が挙げられる。また、近赤外光重合開始剤の代表的なものとしては、例えば例えば、１，１，５，５−テトラキス（ｐ−シメチルアミノフェニル）−２，４−ベンタジニエル・トリフェニルｎ−ブチルボレート等の特開平８−３２３８６０号公報に開示されている化合物が挙げられる。
【００１３】
紫外線重合開始剤を単独で含む樹脂組成物の場合、紫外線が短波長光であるため、繊維強化材や充填材等の影響を強く受け、繊維強化材や充填材の陰となる部分は重合を開始しないため、繊維強化材や充填材の種類や添加量、厚さに制限があった。また、自然光は季節、天候、場所、時間等によって光の強さおよび構成する波長の比率が変化するため、紫外線重合開始剤、可視光重合開始剤および近赤外光重合開始剤を単独で含むものよりも、組み合わせたものの方が、上記自然条件の影響を受けにくく、自然光でプリプレグシートを安定的に硬化させることができる。なお、光硬化性樹脂組成物に使用される充填剤としては、何ら制限がなく、例えば、炭酸カルシウム、タルク、クレー、ガラス粉、水酸化アウルミニウム、硫酸バリウム、酸化チタン等の公知のものが使用できる。
【００１４】
また、光硬化性樹脂組成物に使用される増粘剤としては、何ら制限がなく、例えば、酸化マグネシウム、水酸化マグネシウム、酸化カルシウム、水酸化カルシウム等のアルカリ土類金属化合物、アルミニウムアルコラートのような有機金属化合物、トルイレンジイソシアナート、キシリレンジイソシアナート、ヘキサメチレンジイソシアナート、ジフェニルメタンジイソシアナート等のイソシアナート類等の公知のものが使用できる。
【００１５】
また、低収縮剤としては、ポリスチレン、ポリ酢酸ビニル、ポリメチルメタクリレート等の熱可塑性樹脂を挙げることができる。また、難燃剤としては、塩素化パラフィン、ヘキサブロムベンゼン等のハロゲン化合物とし三酸化アンチモン、リン化合物の併用や、水酸化アルミニウム、水酸化マグネシウム等の無機水和物等が挙げられる。本発明に使用される繊維強化材としては、有機及び／又は無機繊維であり、例えば、ガラス繊維、炭素繊維、アラミド繊維、アクリル繊維、ポリエステル繊維等公知のものが挙げられるが、価格や性能のバランスからガラス繊維が好ましい。繊維強化材の形状は、マットや織物など特に限定されない。
【００１６】
本発明に用いるプリプレグシートは、一般的なＳＭＣ（シートモールディングコンパウンド）の製造方法で製造されるものでよく、上記の光硬化性樹脂組成物をポリエチレンやポリアミド等のフィルム上に塗布した後、ガラス繊維チョップドストランドマットやガラス繊維織物のような繊維強化材をその上に乗せ、圧着含浸させてシート状にし、しかる後、増粘熟成の程度を調整することにより、施工性に適した極めて柔軟性に富んだプリプレグシートを得ることができる。前記のプリプレグシートは、ロール状で暗所に保管しておき、施工時に被防水下地上で拡布を行い、適切な長さに切断して被防水下地に被覆し、光を照射することにより硬化させる。本発明の防水工法で、広い場所を施工する場合などでのプリプレグシート間の接着方法は、隣り合うプリプレグシートの側縁を重ね合わせ、仮接着し、次いで該重ね合わせ部に光を照射させることにより、プリプレグシート同士の接着を行う。重ね合わせ代は、０．５〜１０ｃｍであることが好ましく、さらに、好ましくは３〜７ｃｍである。あるいは、隣り合うプリプレグシート間の目地部に別のプリプレグシートを重ね、仮接着し、次いで光照射により該プリプレグシートを硬化させることで目地処理をする。
【００１７】
仮接着とは、プリプレグシート同士を重ね合わせ、または該重ね合わせ部をローラー等で圧着させた状態で、該重ね合わせ部を手ではがすことが可能な状態をいい、完全接着とは、仮接着したプリプレグシートの重ね合わせ部に、光を照射させることにより、重ね合わせ部を硬化させた、手ではがすことが不可能な状態をいう。本発明での光照射は、自然光で充分であるが、必要に応じて照明用ランプ、ハロゲンランプ、白熱灯、赤外線ランプ、紫外線ランプ等を使用し、接着時間を短縮することもできる。本発明に用いられるプリプレグシートは、極めて柔軟性に優れており、被防水下地の平面部分は勿論、複雑な表面形状部分にも良く屈曲適応してその表面を被覆することができる。さらに、プリプレグシート同士の接着に接着剤の使用は必要なく、プリプレグシート間の接着作業が著しく簡単になる。
【００１８】
【発明の実施の形態】
次に実施例により本発明を説明する。
【００１９】
〔実施例１〕
ベンゾフェノン、トリメチルベンゾイルジフェニルフォスフィンオキシド、および１，１，５，５−テトラキス（ｐ−シメチルアミノフェニル）−２，４−ベンタジニエル・トリフェニルｎ−ブチルボレートの組み合わせからなる光重合開始剤と、不飽和ポリエステル樹脂を含む光硬化性樹脂組成物をガラス繊維チョップドストランドマットに含浸させてなる、厚さ２．０ｍｍ、幅１．０ｍ、長さ１０ｍの光硬化性のプリプレグシートを製造し、ロール状で保管しておいた。
【００２０】
陸屋根をもつ戸建住宅の屋上２００ｍ2にウレタン系接着剤を１００ｍｍ間隔で筋状に塗り付けて被防水下地とした後、保管しておいたロール状のプリプレグシートの１枚を拡布しながら、被防水下地の一部を被覆し、屋上の端に沿ってプリプレグシートをカッターで切断した。次に、別のプリプレグシートを前記被覆を行ったプリプレグシートの側縁に沿って幅５ｃｍの重ねあわせ部分ができるように拡布を行い、前記同様に、屋上の端に沿ってプリプレグシートを切断した。同様の操作を繰り返しながら、プリプレグシートを被防水下地全体に被覆した。その後、プリプレグシート間の接着部の継ぎ目がなだらかになるようにローラーがけを行い、そのまま１０時間以上放置させて被覆を行ったプリプレグシート全体を自然光で硬化させた。
【００２１】
〔比較例１〕
陸屋根をもつ戸建住宅の屋上２００ｍ2にウレタン系接着剤を１００ｍｍ間隔で筋状に塗り付けて被防水下地とした後、不飽和ポリエステル樹脂からなる厚さ２．０ｍｍ、幅１．０ｍ、長さ１０ｍの柔軟性ガラス繊維強化シートの１枚を拡布しながら、被防水下地の一部を被覆し、屋上の端に沿って繊維強化シートをカッターで切断した。次に、別の繊維強化シートを前記被覆を行った繊維強化シートの側縁に沿って拡布を行い、前記同様に、屋上の端に沿って繊維強化シートを切断した。
【００２２】
同様の操作を繰り返しながら、繊維強化シートを被防水下地全体に被覆した。その後、隣り合う繊維強化シート間目地部にガラス繊維チョップドストランドマットを敷いた後、不飽和ポリエステル樹脂を含浸させて硬化接合することにより、目地処理を行った。実施例の施工にあたって、施工工数（作業員数）を調べたところ、比較例１では７人必要であったが、実施例１では４人で十分であった。このように、本発明の防水工法は、プリプレグシート同士の接着に接着剤を使用する必要がなく、プリプレグシート同士の接着作業を簡単に行うことができ、作業能率を著しく向上させることができた。
【００２３】
【発明の効果】
本発明の防水工法は、施工時に用いる光硬化性プリプレグシートが、極めて柔軟性に優れており、被防水下地の平面部分は勿論、複雑な表面形状部分にも良く屈曲適応してその表面を被覆することができる。さらに、接着剤を使用することなく、プリプレグシート間の接着を簡単に行うことができ、現場での施工を簡便にすることができる。また、本発明の防水工法は、光硬化性樹脂組成物からなるプリプレグシートを用いるため、作業現場におけるスチレンモノマーの揮散を抑制することができ、作業環境の改善が可能である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waterproofing method for a waterproof base such as a rooftop or a floor.
[0002]
[Prior art]
Conventionally, waterproofing of waterproofing foundations such as rooftops and floors has been done with asphalt waterproofing paint or vinyl chloride sheet, but in the case of pasting asphalt waterproofing paint or vinyl chloride sheet, etc. Since the strength is low and the deterioration is severe, the waterproof effect is impaired in a short period of time, and frequent maintenance work is forced. On the other hand, a method of forming a waterproof layer on the surface of the waterproof substrate is also known by impregnating the unsaturated polyester resin into a glass fiber chopped strand mat at the construction site, and performing molding, but this method is excellent. Although the mechanical strength can be exhibited, there is a problem that the moisture contained in the waterproof substrate is converted into water vapor by the temperature rise after construction and expands to raise the waterproof layer and cause the waterproof layer to swell. In addition, since the method hardens the resin at the construction site, there is a problem of deterioration of the working environment due to the volatilization of volatile substances such as styrene monomer in the unsaturated polyester resin.
[0003]
In order to solve the problems of the above construction method, a waterproof construction method using a flexible glass fiber reinforced resin molded sheet is disclosed in Japanese Patent Application Laid-Open No. 9-11376. It has to be fixed by a resin adhesive such as polyester, or the joint between sheets needs to be coated and hardened with glass fiber impregnated with an unsaturated polyester resin, which has the disadvantage that the construction work becomes complicated.
[0004]
[Problems to be solved by the invention]
The object of the present invention is to solve the problems of the conventional waterproofing method as described above, suppress the volatilization of the styrene monomer at the work site, eliminate the need to use an adhesive for bonding the prepreg sheets, and An object of the present invention is to provide a waterproof method excellent in mechanical strength and weather resistance that can be applied regardless of moisture in the waterproof base.
[0005]
[Means for Solving the Problems]
That is, the present invention is as follows.
(1) After the prepreg sheets impregnated with a photocurable resin composition was coated onto a waterproof base, a line power sale waterproof construction method the curing of the prepreg sheet by light irradiation, the photocurable resin composition As a method for bonding the impregnated prepreg sheets, a part of the prepreg sheets is overlapped and temporarily bonded by pressure bonding, and then the prepreg sheets are completely bonded to each other by curing the prepreg sheets by light irradiation. Waterproof construction method characterized by .
[0006]
The prepreg sheet used in the present invention is a fiber reinforced material impregnated with a photocurable resin composition, and the prepreg sheets can be bonded together by curing the prepreg sheets by light irradiation. It is preferable that it is a so-called semi-cured state from the viewpoint of workability. The photocurable resin composition used in the present invention comprises a resin, a photopolymerization initiator, and a vinyl monomer such as a styrene monomer, and if necessary, a filler, a thickener, a low shrinkage agent, a flame retardant. Etc. may be mixed.
[0007]
Examples of the resin of the photocurable resin composition used in the present invention include unsaturated polyesters and vinyl esters as disclosed in JP-A-8-328360. Specifically, as the unsaturated polyester, a dicarboxylic acid having an active unsaturated bond alone or a dicarboxylic acid used in combination with a dicarboxylic acid not having an active unsaturated bond as an acid component, and a polyhydric alcohol as an alcohol. It is obtained as an ingredient. For example, examples of the dicarboxylic acid having no active unsaturated bond include phthalic anhydride, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, adipic acid, and sebacic acid.
[0008]
Examples of the dicarboxylic acid having an active unsaturated bond include fumaric acid, maleic acid, maleic anhydride, itaconic acid and the like. Examples of the polyhydric alcohol include ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, 1,2-butanediol, 1,3-butanediol, 1,5-pentanediol, 1,6-hexanediol, -Methyl-1,3-propanediol, 2,2-dimethyl-1,3-propanediol, cyclohexane-1,4-dimethanol, ethylene oxide adduct of bisphenol A, propylene oxide adduct of bisphenol A, etc. And monohydric alcohols.
[0009]
On the other hand, specific examples of the vinyl ester include epoxy (meth) acrylate obtained by using an epoxy resin and acrylic acid or methacrylic acid as components, or a terminal carboxyl group obtained from a saturated dicarboxylic acid and / or an unsaturated dicarboxylic acid and a polyhydric alcohol. It is a polyester (meth) acrylate obtained by reacting an epoxy compound containing an α, β-unsaturated carboxylic ester group with this polyester.
[0010]
Examples of the epoxy resin include bisphenol A diglycidyl ether and high molecular weight homologues thereof, novolak type polyglycidyl ethers, and the like. Examples of the saturated dicarboxylic acid include dicarboxylic acids having no active unsaturated group, such as phthalic acid, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, adipic acid, and sebacic acid. Examples of the unsaturated dicarboxylic acid include dicarboxylic acids having an active unsaturated group, such as fumaric acid, maleic acid, maleic anhydride, and itaconic acid. Examples of the polyhydric alcohol include ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, 1,2-butanediol, 1,3-butanediol, 1,5-pentanediol, 1,6-hexanediol, and 2-methyl. -1,3-propanediol, 2,2-dimethyl-1,3-propanediol, cyclohexane-1,4-dimethanol, ethylene oxide adduct of bisphenol A, propylene oxide adduct of bisphenol A, and the like.
[0011]
A typical example of the epoxy compound containing an α, β-unsaturated carboxylic acid ester group is glycidyl methacrylate. As the photopolymerization initiator of the photocurable resin composition used in the present invention, any known composition can be used as long as it is an active composition at 200 nm to 1200 nm, and ultraviolet light, visible light, and near red can be used. A combination of polymerization initiators active in each region of external light is preferable.
[0012]
Typical examples of ultraviolet polymerization initiators include benzophenone or 2,2-dimethoxy-2-phenylacetophenone, and representative examples of visible light polymerization initiators include benzyl and trimethylbenzoyldiphenylphosphine oxide. . Moreover, as a typical thing of a near-infrared photoinitiator, for example, 1,1,5,5-tetrakis (p-cymethylaminophenyl) -2,4-benzadiniel triphenyl n-butyl borate And the like, and the compounds disclosed in JP-A-8-323860.
[0013]
In the case of a resin composition containing an ultraviolet polymerization initiator alone, since ultraviolet rays are short-wavelength light, it is strongly affected by fiber reinforcements and fillers, and the portions behind the fiber reinforcements and fillers are polymerized. Since it did not start, there were limitations on the type, amount and thickness of fiber reinforcement and filler. In addition, natural light contains ultraviolet polymerization initiator, visible light polymerization initiator, and near-infrared photopolymerization initiator alone, because the intensity of light and the ratio of the wavelength of the component change depending on the season, weather, place, time, etc. The combined one is less susceptible to the above natural conditions than the one, and the prepreg sheet can be stably cured with natural light. The filler used in the photocurable resin composition is not limited at all, and examples thereof include known ones such as calcium carbonate, talc, clay, glass powder, aurium hydroxide, barium sulfate, and titanium oxide. Can be used.
[0014]
Further, the thickener used in the photocurable resin composition is not limited at all, and examples thereof include alkaline earth metal compounds such as magnesium oxide, magnesium hydroxide, calcium oxide and calcium hydroxide, and aluminum alcoholate. Known organic metal compounds, isocyanates such as toluylene diisocyanate, xylylene diisocyanate, hexamethylene diisocyanate and diphenylmethane diisocyanate can be used.
[0015]
In addition, examples of the low shrinkage agent include thermoplastic resins such as polystyrene, polyvinyl acetate, and polymethyl methacrylate. Examples of the flame retardant include halogen compounds such as chlorinated paraffin and hexabromobenzene, and a combination of antimony trioxide and phosphorus compound, and inorganic hydrates such as aluminum hydroxide and magnesium hydroxide. The fiber reinforcement used in the present invention is an organic and / or inorganic fiber, and examples thereof include known materials such as glass fiber, carbon fiber, aramid fiber, acrylic fiber, and polyester fiber. Glass fiber is preferable from the viewpoint of balance. The shape of the fiber reinforcement is not particularly limited, such as a mat or a woven fabric.
[0016]
The prepreg sheet used in the present invention may be manufactured by a general SMC (Sheet Molding Compound) manufacturing method, and after applying the above-mentioned photocurable resin composition on a film of polyethylene, polyamide, etc., glass A fiber reinforced material such as fiber chopped strand mat or glass fiber woven fabric is placed on top of it, and it is crimped and impregnated to form a sheet. A rich prepreg sheet can be obtained. The prepreg sheet is stored in a dark place in the form of a roll, spreads on a waterproof base during construction, cuts to an appropriate length, covers the waterproof base, and cures by irradiating light. Let In the waterproofing method of the present invention, the adhesion method between prepreg sheets when constructing a wide area is such that the side edges of adjacent prepreg sheets are overlapped, temporarily bonded, and then the overlapping portion is irradiated with light. Thus, the prepreg sheets are bonded to each other. The overlap allowance is preferably 0.5 to 10 cm, and more preferably 3 to 7 cm. Alternatively, another prepreg sheet is stacked on a joint between adjacent prepreg sheets, temporarily bonded, and then the prepreg sheet is cured by light irradiation to perform joint treatment.
[0017]
Temporary adhesion refers to a state where prepreg sheets are overlapped with each other, or the overlapping part is pressure-bonded with a roller or the like, and the overlapping part can be peeled by hand. It refers to a state in which the overlapping portion of the prepared prepreg sheet is irradiated with light to cure the overlapping portion and cannot be peeled off by hand. For the light irradiation in the present invention, natural light is sufficient, but if necessary, an adhesion lamp can be shortened by using an illumination lamp, a halogen lamp, an incandescent lamp, an infrared lamp, an ultraviolet lamp or the like. The prepreg sheet used in the present invention is extremely flexible, and can be flexibly adapted to cover the surface of a complex surface shape portion as well as the flat surface portion of the waterproof base. Furthermore, it is not necessary to use an adhesive for bonding the prepreg sheets, and the bonding operation between the prepreg sheets is remarkably simplified.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Next, an example explains the present invention.
[0019]
[Example 1]
A photoinitiator comprising a combination of benzophenone, trimethylbenzoyldiphenylphosphine oxide, and 1,1,5,5-tetrakis (p-cymethylaminophenyl) -2,4-benzadiniel triphenyl n-butylborate; A photo-curable prepreg sheet having a thickness of 2.0 mm, a width of 1.0 m, and a length of 10 m is produced by impregnating a glass fiber chopped strand mat with a photo-curable resin composition containing an unsaturated polyester resin, and a roll Stored in the form.
[0020]
After the object to be waterproof base and smeared streak at 100mm intervals urethane-based adhesive on the roof 200m 2 of detached houses with a flat roof, while open width a single roll of prepreg sheet that had been stored, A part of the waterproof base was covered, and the prepreg sheet was cut with a cutter along the rooftop edge. Next, another prepreg sheet was spread so that an overlapped portion having a width of 5 cm could be formed along the side edge of the coated prepreg sheet, and the prepreg sheet was cut along the rooftop edge in the same manner as described above. . While repeating the same operation, the entire prepreg sheet was covered with the waterproof base. Thereafter, the rollers were rolled so that the joints between the prepreg sheets were smooth, and the entire prepreg sheet that had been coated by being allowed to stand for 10 hours or longer was cured with natural light.
[0021]
[Comparative Example 1]
After applying urethane adhesive to the roof of 200m 2 of a detached house with a flat roof at 100mm intervals to form a waterproof base, it is 2.0mm thick and 1.0m wide and made of unsaturated polyester resin. While spreading one piece of a flexible glass fiber reinforced sheet having a length of 10 m, a part of the waterproof base was covered, and the fiber reinforced sheet was cut with a cutter along the edge of the rooftop. Next, another fiber reinforced sheet was spread along the side edge of the coated fiber reinforced sheet, and the fiber reinforced sheet was cut along the rooftop edge in the same manner as described above.
[0022]
The fiber reinforced sheet was coated on the entire waterproof base while repeating the same operation. Then, after laying a glass fiber chopped strand mat on the joint between adjacent fiber reinforced sheets, the joint treatment was performed by impregnating the unsaturated polyester resin and curing and joining. When the construction man-hour (number of workers) was examined in the construction of the example, seven people were necessary in the comparative example 1, but four people were sufficient in the example 1. As described above, the waterproofing method of the present invention does not require the use of an adhesive for bonding the prepreg sheets, can easily perform the bonding work between the prepreg sheets, and can significantly improve the work efficiency. .
[0023]
【The invention's effect】
In the waterproofing method of the present invention, the photo-curable prepreg sheet used at the time of construction is extremely flexible, and it is well adapted to bend not only to the flat surface part of the waterproof base but also to the complex surface shape part to cover the surface. can do. Furthermore, adhesion between prepreg sheets can be easily performed without using an adhesive, and construction on site can be simplified. Moreover, since the waterproof construction method of this invention uses the prepreg sheet | seat which consists of a photocurable resin composition, volatilization of the styrene monomer in a work site can be suppressed, and the work environment can be improved.
Claims (1)
前記光硬化性樹脂組成物を含浸させたプリプレグシート同士の接着方法として、該プリプレグシートの一部を重ね合わせて圧着による仮接着を行った後、光照射によって該プリプレグシートの硬化を行うことでプリプレグシート同士を完全接着させることを特徴とする防水工法。After the prepreg sheets impregnated with a photocurable resin composition was coated onto a waterproof base, a line power sale waterproof construction method the curing of the prepreg sheet by light irradiation,
As a method of adhering prepreg sheets impregnated with the photocurable resin composition, by overlapping a part of the prepreg sheets and performing temporary adhesion by pressure bonding, the prepreg sheets are cured by light irradiation. A waterproofing method characterized by completely bonding prepreg sheets together .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14248897A JP3868059B2 (en) | 1997-05-30 | 1997-05-30 | Waterproofing method using photo-curable prepreg sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14248897A JP3868059B2 (en) | 1997-05-30 | 1997-05-30 | Waterproofing method using photo-curable prepreg sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10331345A JPH10331345A (en) | 1998-12-15 |
| JP3868059B2 true JP3868059B2 (en) | 2007-01-17 |
Family
ID=15316497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14248897A Expired - Fee Related JP3868059B2 (en) | 1997-05-30 | 1997-05-30 | Waterproofing method using photo-curable prepreg sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3868059B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010245343A (en) * | 2009-04-07 | 2010-10-28 | Asahi Kasei Chemicals Corp | Solar cell installation method using prepreg frp sheet |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11228649A (en) * | 1998-02-12 | 1999-08-24 | Showa Highpolymer Co Ltd | Photo-setting waterproof material and waterproof coating execution |
| JP4608750B2 (en) * | 1999-08-31 | 2011-01-12 | Ｄｉｃ株式会社 | Photo-curable resin compound and its curing method |
| JP2017048576A (en) * | 2015-08-31 | 2017-03-09 | サンコーテクノ株式会社 | Installation method of water conveyance gutter |
-
1997
- 1997-05-30 JP JP14248897A patent/JP3868059B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010245343A (en) * | 2009-04-07 | 2010-10-28 | Asahi Kasei Chemicals Corp | Solar cell installation method using prepreg frp sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10331345A (en) | 1998-12-15 |
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