JP3969832B2 - Waterproof material composition, process for producing the same, waterproof film and method for forming the same - Google Patents
Waterproof material composition, process for producing the same, waterproof film and method for forming the same Download PDFInfo
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- JP3969832B2 JP3969832B2 JP08839898A JP8839898A JP3969832B2 JP 3969832 B2 JP3969832 B2 JP 3969832B2 JP 08839898 A JP08839898 A JP 08839898A JP 8839898 A JP8839898 A JP 8839898A JP 3969832 B2 JP3969832 B2 JP 3969832B2
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- Prior art keywords
- material composition
- parts
- waterproof
- acid
- weight
- Prior art date
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- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- POSICDHOUBKJKP-UHFFFAOYSA-N prop-2-enoxybenzene Chemical compound C=CCOC1=CC=CC=C1 POSICDHOUBKJKP-UHFFFAOYSA-N 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- MWWATHDPGQKSAR-UHFFFAOYSA-N propyne Chemical group CC#C MWWATHDPGQKSAR-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- HIEHAIZHJZLEPQ-UHFFFAOYSA-M sodium;naphthalene-1-sulfonate Chemical compound [Na+].C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 HIEHAIZHJZLEPQ-UHFFFAOYSA-M 0.000 description 1
- 238000007592 spray painting technique Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions 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
- C04B28/06—Aluminous cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0045—Polymers chosen for their physico-chemical characteristics
- C04B2103/0065—Polymers characterised by their glass transition temperature (Tg)
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
Landscapes
- 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)
- Paints Or Removers (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明はコンクリート建造物やコンクリート構造物、軽量起泡コンクリート、モルタル等に用いられる施工性に優れた防水材組成物及び当該防水材組成物から形成される機械的性質や防水性等に優れた防水膜に関する。
【０００２】
【従来の技術】
コンクリート建造物等の防水工法については、アスファルト防水工法、改質アスファルト防水工法、シート防水工法、及び塗膜防水工法等の多くの技術が開発されている。特に、水硬性セメント、骨材、及び合成樹脂エマルジョンからなる組成物を塗布して用いる塗膜防水工法は、施工法が簡便であり比較的容易に所望の防水特性が得られることが知られており、特公昭５１−４０３７１号公報、特公昭５８−５１５７０号公報、特公昭６３−３１０６号公報、特公平１−３９７１３号公報、特公平５−４５５３９号公報、特開昭５４−５３１４０号公報、特開昭５６−４１２８６号公報、特開昭５６−１６０３５７号公報、特開昭６２−２５３６４８号公報、特開平３−３９３８７号公報、及び特開平３−５０１４６号公報等に塗膜防水工法の技術が開示されている。
【０００３】
これらの公報に開示されている防水材組成物は、水硬性セメント、骨材、及び合成樹脂エマルジョンを混合すると、セメントは合成樹脂エマルジョンに含まれる水との水和反応により硬化が進み、又、合成樹脂エマルジョンは分散媒である水が水硬性セメントの水和反応により消費されると共に蒸発拡散によって系外に散逸するために、結果として比較的速やかに塗膜が形成されるものである。
【０００４】
【発明が解決しようとする課題】
このような水硬性セメント、骨材、及び合成樹脂エマルジョンからなる防水材組成物をコンクリート構造物等の表面に塗布あるいは吹き付け等して塗膜を形成させるには、作業中は当該防水材組成物の粘度が作業に都合の良い範囲にあり、塗布作業終了後は塗膜が速やかに形成されて所望の初期強度を有する塗膜を形成することが必要である。即ち、防水材組成物の初期粘度の制御及び塗膜の形成速度の制御が重要な技術となる。
【０００５】
ところが、水硬性セメント、骨材、及び合成樹脂エマルジョンからなる防水材組成物の初期粘度や塗膜の形成速度は温度に極めて敏感であるという課題があった。事実、このような塗膜防水工法では、防水材組成物の粘度や塗膜の形成速度が夏冬の温度差による影響を受けるため、熟練した技術者が施工当日の温度条件を判断して組成比を微妙に変更したり、水の量を調整することにより対応していた。
【０００６】
しかしながら、工事現場において技術者の判断で製品の組成比を変更することは、品質保証の観点からも好ましい対応ではなく、組成比の変更は硬化した塗膜の機械的強度、防水性能、及び基材との密着強度等の性能に悪影響を与え、品質のばらつきの原因ともなってしまうという課題があった。
【０００７】
本発明は、このような従来技術の課題を解決し、施工温度が変化しても、初期粘度や塗膜の形成速度に優れ、かつ、硬化速度の変化が小さく施工性に優れた防水材組成物を提供し、かつ、当該防水材組成物から形成される機械的特性、防水性、及び耐久性に優れる防水膜を提供することを目的とする。
【０００８】
【課題を解決するための手段】
即ち本発明は施工温度が変化してもその粘度変化がすくなく、又硬化時間への影響も小さい防水材組成物及び当該防水材組成物から形成される防水膜に関するものである。
【０００９】
【課題を解決するための手段】
即ち本発明は、水硬性セメントのアルミナセメント、骨材、合成樹脂エマルジョンのエチレン−酢酸ビニル共重合体エマルジョン、及びオキシカルボン酸の酒石酸を含有してなる防水材組成物であり、さらに、ポリカルボン酸を含有してなる該防水材組成物であり、ポリカルボン酸が無水マレイン酸／メトキシポリエチレングリコールアリルエーテル共重合体や無水マレイン酸／メトキシポリエチレングリコールビニルエーテル共重合体である該防水材組成物であり、水硬性セメント２０〜８０重量部と骨材８０〜２０重量部からなる水硬性セメント組成物、並びに、水硬性セメント組成物１００重量部に対して、合成樹脂エマルジョン１０〜２００重量部（ただし固形分として）、オキシカルボン酸０．１〜５０重量部及びポリカルボン酸０〜１０重量部を含有してなる該防水材組成物であり、そして、水硬性セメント、骨材、合成樹脂エマルジョン、及びオキシカルボン酸を混合してなることを特徴とする該防水材組成物の製法である。又、該防水材組成物から形成される防水膜であり、該防水材組成物を塗布してなることを特徴とする防水膜の形成方法であり、該防水材組成物を吹き付けて塗布してなることを特徴とする防水膜の形成方法である。
【００１０】
【発明の実施の形態】
以下に本発明を詳細に説明する。
【００１１】
本発明は水硬性セメントと骨材からなる水硬性セメント組成物を含有するものである。
本発明に使用される水硬性セメントには特に制限はなく、水硬性石灰、ローマンセメント、天然セメント、普通ポルトランドセメント、低発熱ポルトランドセメント、早強ポルトランドセメント、白色ポルトランドセメント、高酸化鉄型ポルトランドセメント、チタンセメント、マンガンセメント、クロムセメント、及びアルミナセメント等を単体セメントとして、あるいは混合セメントとして用いることができる。
これらの中では、普通ポルトランドセメント、早強ポルトランドセメント、及びアルミナセメントが好ましく、分散性に優れ、水を吸収しやすく、水和反応速度が早いために乾燥性が向上する点で、アルミナセメントがより好ましい。
【００１２】
骨材には特に制限はなく、砕石、砂利、硅砂、石灰石、炭酸カルシウム、シリカ、アルミナ、ガラスビーズ、ガラス繊維、ガラス粉末、樹脂粉末、及び焼却灰等の骨材を使用することができる。これらの中では、硅砂が好ましい。
【００１３】
本発明の水硬性セメント組成物の組成比は水硬性セメント２０〜８０重量部と骨材８０〜２０重量部からなることが好ましく、水硬性セメント３０〜７０重量部と骨材７０〜３０重量部からなることがより好ましい。水硬性セメント組成物がこの範囲を逸脱すると、得られた防水膜の機械的強度、防水性、及び基材との密着性等の性質が劣るおそれがある。
【００１４】
本発明の合成樹脂エマルジョンは塗膜防水材組成物の伸び性能を確保し、下地コンクリート等に対するひび割れ追従性を得るために添加するものである。
【００１５】
合成樹脂エマルジョンの合成樹脂はガラス転移温度が２０℃以下が好ましく、１０℃以下がより好ましい。ガラス転移温度が２０℃を越えると得られた防水膜の機械的強度、防水性、及び基材との密着性等の性質、特に耐寒特性が低下するおそれがある。
【００１６】
合成樹脂エマルジョンとしては、ポリ酢酸ビニルエマルジョン、エチレン／酢酸ビニル共重合体エマルジョン、エチレン／酢酸ビニル／アクリル酸エステル共重合体エマルジョン、エチレン／酢酸ビニル／メタアクリル酸エステル共重合体エマルジョン、エチレン／アクリル酸エステル共重合体エマルジョン、エチレン／メタアクリル酸エステル共重合体エマルジョン、ポリアクリル酸エステルエマルジョン、ポリメタアクリル酸エステルエマルジョン、ポリスチレン／アクリル酸エステルエマルジョン、ポリスチレン／メタアクリル酸エステルエマルジョン、ポリクロロプレンラテックス、酢酸ビニル／塩化ビニル共重合体エマルジョン、スチレン／ブタジエン共重合体エマルジョン、ポリアクリロニトリル／ブタジエン共重合体エマルジョン、酢酸ビニル／アクリル酸エステルエマルジョン、酢酸ビニル／メタアクリル酸エステルエマルジョン、スチレン／アクリル酸エステルエマルジョン、及びスチレン／メタアクリル酸エステルエマルジョン等が挙げられる。
これらの中では、添加した効果が大きい点で、エチレン／酢酸ビニル共重合体エマルジョンが好ましい。
【００１７】
他にも、本発明で使用するポリカルボン酸を乳化剤として用いて製造した合成樹脂エマルジョンを使用してもよい。この場合には例えば、通常使用する乳化剤とポリカルボン酸との共存下で当該エマルジョンの乳化重合を行うことができる。ポリカルボン酸を乳化剤として使用した場合には後述するポリカルボン酸と同様の効果がある。
【００１８】
又、水を含まないいわゆる粉末エマルジョンも合成樹脂エマルジョンとして使用できる。粉末エマルジョンを用いると水を除いた全成分を一つのパッケージとでき、施工現場では水を添加するだけで良いので便利である。
【００１９】
合成樹脂エマルジョンの添加量は水硬性セメント組成物１００重量部に対して４０〜２００重量部（ただし固形分として）が好ましく、６０〜１５０重量部がより好ましい。４０重量部未満だと良好な塗膜物性が得られず、下地コンクリートに対するひび割れ追従性が低下し、塗膜自体にひび割れが発生したり、防水性や基材との密着性等が劣ったりするおそれがある。２００重量部を越えると塗膜強度が低下するおそれがある。
【００２０】
又、合成樹脂エマルジョン中の合成樹脂の固形分濃度は、合成樹脂エマルジョン１００重量部中、３０〜８０重量部が好ましく、５０〜６０重量部がより好ましい。３０重量部未満だと粘度が大きすぎて作業性が低下したり、防水膜を均一に塗布できないおそれがあり、８０重量部を越えると防水性組成物が硬化しにくいおそれがある。
【００２１】
本発明のオキシカルボン酸は、防水材組成物の適正な練り上がり粘度を確保するとともに、施工に必要な可使時間を確保するものである。
オキシカルボン酸は、一分子中に水酸基とカルボキシル基を持つ有機酸である。オキシカルボン酸としては、グリコール酸、乳酸、ヒドロアクリル酸、α−オキシ酪酸、グリセリン酸、タルトロン酸、リンゴ酸、酒石酸、及びクエン酸等の脂肪族オキシカルボン酸、グルコン酸、ガラクトン酸、及びマンノン酸等のアルドン酸、並びに、サリチル酸、ｍ−オキシ安息香酸、ｐ−オキシ安息香酸、没食子酸、マンデル酸、及びトロパ酸等の芳香族オキシカルボン酸等が挙げられる。
これらの中では、可使時間が適正な点で、酒石酸が好ましい。
【００２２】
オキシカルボン酸の添加量は、水硬性セメント組成物１００重量部としたとき０．３〜２０重量部が好ましく、０．５〜１０重量部がより好ましい。添加量が０．３重量部未満だと防水材組成物を練ったとき粘度の上昇が大きくなって可使時間が短くなるおそれがあり、２０重量部を越えるとセメントの水和が遅延し、硬化時間が実用上好ましくない程度まで遅延したり、得られる防水膜の機械的強度、防水性、及び基材との密着性等が劣ったりおそれがある。
【００２３】
本発明では、流動性が向上し、作業性が改善されるとともに、高温時において防水材組成物の練り上がり粘度を適正に確保しやすくする点で、ポリカルボン酸を添加することが好ましい。
ポリカルボン酸は、エチレン性不飽和カルボン酸やカルボン酸無水物の単独重合体、又はこれらの単量体と他の単量体との共重合体であり、これらの単独重合体や共重合体の水溶性塩（アルカリ金属塩、アルカリ土類金属塩、アンモニウム塩、及びアミン塩等）であっても良い。
なお、ここでいうエチレン性不飽和カルボン酸としては、（メタ）アクリル酸、イタコン酸、マレイン酸、フマル酸、クロトン酸、及びシトラコン酸等が挙げられる。
同じくカルボン酸無水物としては、無水マレイン酸や無水イタコン酸等が挙げられる。
【００２４】
又、他の単量体としては、エチレン、プロピレン、及びイソブテン等のオレフィン単量体、ブタジエン、イソプレン、及びクロロプレン等の共役ジエン単量体、スチレン、α−メチルスチレン、ビニルトルエン、クロロスチレン、及びスチレンスルホン酸等の芳香族ビニル単量体、（メタ）アクリル酸メチル、（メタ）アクリル酸エチル、（メタ）アクリル酸ブチル、（メタ）アクリル酸−２−エチルヘキシル、２−ヒドロキシエチル（メタ）アクリレート、Ｎ，Ｎ−ジメチルアミノエチル（メタ）アクリレート、メトキシポリエチレングリコール（メタ）アクリレート、及びメトキシポリプロピレングリコール（メタ）アクリレート等の（メタ）アクリル酸エステル単量体、メチルアリルエーテル、エチルアリルエーテル、ブチルアリルエーテル、２−エチルヘキシルアリルエーテル、及びフェニルアリルエーテル等のアリルエーテル単量体、（メトキシ）ポリエチレングリコールアリルエーテルや（メトキシ）ポリプロピレングリコールアリルエーテル等のアルキレングリコール（アルキル）アリルエーテル単量体、メチルビニルエーテル、エチルビニルエーテル、ブチルビニルエーテル、２−エチルヘキシルビニルエーテル、及びフェニルビニルエーテル等のビニルエーテル単量体、（メトキシ）ポリエチレングリコールビニルエーテル、及び（メトキシ）ポリプロピレングリコールビニルエーテル等のアルキレングリコール（アルキル）ビニルエーテル単量体、酢酸ビニルやプロピオン酸ビニル等の脂肪酸ビニル単量体、（メタ）アクリルアミド、α−エチル（メタ）アクリルアミド、Ｎ−ブトキシメチル（メタ）アクリルアミド、及びＮ，Ｎ−ジメチル（メタ）アクリルアミド等の（メタ）アクリルアミド単量体、（メタ）アクリロニトリル、並びに塩化ビニル等が挙げられる。
【００２５】
これらのポリカルボン酸の中では、無水マレイン酸／メトキシポリエチレングリコールアリルエーテル共重合体、無水マレイン酸／メトキシポリエチレングリコールビニルエーテル共重合体、無水マレイン酸／メトキシポリエチレングリコールアリルエーテル／スチレン共重合体、及び無水マレイン酸／メトキシポリエチレングリコールビニルエーテル／スチレン共重合体が好ましい。又、特開平８−４８８５２号公報に記載されている化合物も好ましい。これらの中では、添加した効果が大きい点で、無水マレイン酸／メトキシポリエチレングリコールアリルエーテル共重合体や無水マレイン酸／メトキシポリエチレングリコールビニルエーテル共重合体が好ましい。
【００２６】
ポリカルボン酸は水硬性セメント組成物１００重量部に対して、０〜１０重量部が好ましく、０．０１〜１．０重量部がより好ましく、０．１〜１．０重量部が最も好ましい。１０重量部を越えても作業性は改善されず、硬化時間が実用上好ましくない程度まで遅延したり、得られる防水膜の機械的強度、防水性、及び基材との密着性等が劣ったりするおそれがある。
【００２７】
本発明の防水材組成物は防止膜を形成するためには、水を使用させることが好ましい。
防水材組成物に含有させる水としては、作業現場で余分に水を入れることがなくなり、物性のばらつきを防止することができる点で、合成樹脂エマルジョンに含まれる水だけを使用することが好ましい。しかしながら、エマルジョンの固形分を低くする場合には、合成樹脂エマルジョンとは別に水を添加してもよい。又、粉末エマルジョンを使用する場合にも、水を添加してもよい。
水の添加量は防水材組成物の粘度が被着体の表面に塗布や吹き付け等したりするのに適するように調整される。
【００２８】
本発明の防水材組成物には、ＡＥ剤、ＡＥ減水剤、高性能減水剤、高性能ＡＥ減水剤、分離低減剤、増粘剤、高流動化剤、収縮防止剤、防錆剤、消泡剤、湿潤剤等のコンクリート用混和剤、高炉スラグ、アスファルト乳液、繊維状補強材、防腐剤、着色剤、及び撥水剤等の他の成分を添加することができる。
【００２９】
本発明の防水材組成物はコンクリート建造物等の被着体表面に施工して防水膜を形成するが、防水膜の形成方法は特に制限はなく、刷毛、ローラー、及びこて等の道具を用いて塗布してもよく、又、スプレーガン等により吹き付け塗装することもできる。これらの中では、大面積の塗布面に短時間、均一に塗布できる点で、吹き付け塗装のように吹き付けて塗布することが好ましく、スプレーガンにより吹き付けて塗布することがより好ましい。
【００３０】
コンクリート建造物等の被着体表面に防水膜を施工するに際し、実施態様の一つとして当該防水膜と被着体との接着性や防水性等を改良する目的で、被着体表面に予め塗膜を形成しておき、本発明の防水膜を当該塗膜の表面に積層することができる。又、他の実施態様として防水膜の耐久性等を改良する目的で、防水膜の表面に塗膜を積層することができる。このような塗膜を形成する材料は特に制限はなく、アスファルト、エポキシ樹脂、ウレタン樹脂、不飽和ポリエステル樹脂、アクリル樹脂、及びＥＶＡ樹脂等がある。
【００３１】
又本発明に実施態様の一つとして、防水膜の機械的特性を改良する目的で、編目状鉄筋、アスファルトフェルト、不織布、多孔質シート、ガラス繊維、炭素繊維、及び樹脂シート等を当該防水膜と積層することもできる。
【００３２】
【実施例】
次に実施例を用いて本発明を更に詳細に説明するが、本発明はこれらの実施例によって制約されるものではない。ただし、実施例及び比較例で用いた部及び％は重量基準で示した。
【００３３】
なお、実施例、比較例で行った試験評価方法は次の通りである。
（１）初期粘度
５℃、２０℃あるいは３０℃に制御された恒温室内で防水材組成物の配合を行い、１時間経過後の組成物の粘度をＢＨ型粘度計（４号ローター、回転数１０rpm ）を用いて測定した。
（２）硬化時間
５℃、２０℃あるいは３０℃に制御された恒温室内で防水材組成物を３０cm四方のテフロン製の型に注型して放置し、注型してから触感により硬化するまでの時間を測定した。
（３）引張強度・破断伸び
注型成型で得られた厚さ約１mmの塗膜（材齢７日）からＪＩＳ Ｋ ６３０１−２号ダンベルを切り出し、引張試験機を用いて測定した（引張速度２００mm/ 分、チャック間距離７０mm、測定温度２３℃）。
（４）樹脂のガラス転移温度
合成樹脂エマルジョンを風乾し示差走査熱量計を用いて測定した。
【００３４】
参考例１．ＥＶＡエマルジョン（ＥＶＡ−１）の製造方法
撹拌機のついたステンレス製オートクレーブに純水100 部、酢酸ビニル70部、ポリビニルアルコール2.5 部、ポリエチレングリコールノニルフェニルエーテル0.9 部、及び過硫酸アンモニウム1.25部を仕込み、内容を窒素置換した後に密閉した。次いでエチレン29部を圧入し、内容を65℃に昇温して重合を開始した。重合開始後に酢酸ビニル30部を5 時間かけて連続添加し、更に内温を75℃に昇温して2 時間撹拌して重合を終了した。
【００３５】
得られたＥＶＡエマルジョンの性状は次の通りである。
固形分濃度：55%
樹脂のガラス転移温度：-13 ℃
【００３６】
参考例２．ＥＶＡエマルジョン（ＥＶＡ−２）の製造方法
参考例１で、初期に仕込んだ酢酸ビニル70部に代えて酢酸ビニル62部とアクリル酸-2- エチルヘキシル8 部を用いたこと以外は参考例１と同様にして重合した。
得られたＥＶＡの性状は次の通りである。
固形分濃度：55%
樹脂のガラス転移温度：-19 ℃
【００３７】
参考例３．ＥＶＡエマルジョン（ＥＶＡ−３）の製造方法
参考例１で、乳化剤として、ポリエチレングリコールノニルフェニルエーテルに代えてポリカルボン酸（B-1 ）0.85部を使用したこと以外は参考例１と同様にして重合した。
得られたＥＶＡの性状は次の通りである。
固形分濃度：55%
樹脂のガラス転移温度：-13 ℃
【００３８】
参考例４．アクリルエマルジョン（アクリル−１）の製造方法
撹拌機のついたステンレス製オートクレーブに純水80部、アクリル酸-n- ブチル25.5部、メタクリル酸メチル3 部、ポリエチレングリコールジメタクリレート1.5 部、ポリエチレングリコールノニルフェニルエーテル4.0 部、ナフタレンスルホン酸ナトリウム0.25部、及び過硫酸アンモニウム1.25部を仕込み、窒素置換した後に密閉し、内容を65℃に昇温して重合を開始した。重合開始後にアクリル酸-n- ブチル59.5部、メタクリル酸メチル7 部、及びポリエチレングリコールジメタクリレート3.5 部からなる混合物を5 時間掛けて連続添加し、更に内温を75℃に昇温して2 時間撹拌して重合を終了した。
得られたアクリル樹脂の性状は次の通りである。
固形分濃度：55%
樹脂のガラス転移温度：-36 ℃
【００３９】
実験例１
アルミナセメント、硅砂、合成樹脂エマルジョン、オキシカルボン酸（以下表中でオキシ酸という）、及びポリカルボン酸を表１の配合処方で混合し、防水材組成物及び防水膜としての性能評価を行った。結果は表２にまとめた。ただし、表１に記載した合成樹脂エマルジョンの配合量は固形分換算で示した。
【００４０】
なお、ここで使用した材料は下記の通りである。
ポリカルボン酸Ｂ−１：ポリ（無水マレイン酸／メトキシポリエチレングリコールビニルエーテル）
ポリカルボン酸Ｂ−２：ポリ（無水マレイン酸／メトキシポリエチレングリコールアリルエーテル）
ポリカルボン酸Ｂ−３：ポリアクリル酸ナトリウム
ポリカルボン酸Ｂ−４：ポリアクリル酸
【００４１】
【表１】
【表２】
実験例２
合成樹脂エマルジョンとしてＥＶＡ−１を用い、アルミナセメント、硅砂、合成樹脂エマルジョン、オキシカルボン酸、及びポリカルボン酸を表３の配合処方で混合したこと以外は、実験例１と同様に行った。結果は表４にまとめた。ただし、表３に記載した合成樹脂エマルジョンの配合量は固形分換算で示した。
【００４４】
【表３】
【表４】
実験例３
合成樹脂エマルジョンとしてＥＶＡ−１を用い、アルミナセメント、硅砂、合成樹脂エマルジョン、オキシカルボン酸、及びポリカルボン酸を表５〜６の配合処方で混合したこと以外は、実験例１と同様に行った。結果は表７〜８にまとめた。ただし、表５〜６に記載した合成樹脂エマルジョンの配合量は固形分換算で示した。
【００４７】
【表５】
【表６】
【表７】
【表８】
実験例４
合成樹脂エマルジョンとしてＥＶＡ−１を用い、アルミナセメント、硅砂、合成樹脂エマルジョン、オキシカルボン酸、及びポリカルボン酸を表９〜１０の配合処方で混合したこと以外は、実験例１と同様に行った。結果は表１１〜１２にまとめた。ただし、表９〜１０に記載した合成樹脂エマルジョンの配合量は固形分換算で示した。
【００５２】
【表９】
【表１０】
【表１１】
【表１２】
実験結果に明らかなように、本発明の防水材組成物の５〜３０℃における初期粘度は３０００〜１９８００ｃｐｓの範囲にあり、３０℃における粘度が５℃における粘度の０．９２〜１．５３倍と温度の影響が小さいことがわかる。又、５〜３０℃における硬化時間も５分〜５時間と温度の影響が小さい。
【００５７】
実験例５
実施例５として、実験Ｎｏ．１−３の防水材組成物をスプレーガンにより建築物の屋上のバルコニーの床に吹き付け塗装して、防水膜を形成した。床面積が大きいバルコニーの床に対して、短時間で、均一に防水材組成物を吹き付け塗装することができ、作業性が良好であった。
比較のため比較例５−１として、市販品の防水材組成物（エマルジョン溶液）をスプレーガンにより実施例５と同様に吹き付け塗装した。防水材組成物の粘度が２００００ｃｐｓを越えていたために、スプレーガンが詰まり、吹き付け塗装できなかった。
又、比較例５−２として、粘度が２０００ｃｐｓである市販品の防水材組成物（エマルジョン溶液）をスプレーガンにより実施例５と同様に吹き付け塗装した。市販品の防水材組成物が材料分離して骨材が沈降してしてしまい、スプレーガンが詰まり、床面にむらができて均一に塗布できなかった。
さらに、比較例５−３として、比較例５−１の防水材組成物を希釈して粘度を下げ、スプレーガンにより実施例５と同様に吹き付け塗装できるようにしたところ、防水材組成物が材料分離して骨材が沈降してしてしまい、スプレーガンが詰まり、床面にむらができて均一に塗布できなかった。
【００５８】
【発明の効果】
以上のように、本発明の防水材組成物は、初期粘度や硬化速度の温度依存性が小さいため、施工現場の環境温度の影響を受けることなく安定した施工性が得られる。
又、当該組成物から得られた防水膜は、機械的強度や防水性に優れている。このため、本発明の防水材組成物及びそれから形成された防水膜は、コンクリート建造物の防水あるいは漏水防止、中性化、塩害等のコンクリートの腐食防止、道路、床面等の補修、コンクリートのひび割れ部分、及びプレキャストコンクリート躯体の接合部分等の止水、受水槽、及び貯水槽等の漏水防止等の使途に極めて有効に用いられる。
更に、当該組成物は以下の特徴を有する。従来品の防水材組成物は粘度が低くて骨材が材料分離したものと、粘度が高くて吹き付け塗装できないものしかないために、吹き付け塗装できなかった。しかしながら、本発明の防水材組成物は、従来品と比べて粘度が低く、かつ、骨材が材料分離しないという両方の特性を満たすために、スプレーガン等により均一に、かつ、短時間で広い塗装面に対して吹き付け塗装できるものである。吹き付け塗装は、刷毛、ローラー、及びこてよりも、単位時間当たりの塗装量が大きく、屋根斜面や壁面への塗装も容易なので、作業性が大きく、その産業的利用性は極めて大きい。[0001]
BACKGROUND OF THE INVENTION
The present invention is a waterproof composition excellent in workability used for concrete buildings, concrete structures, lightweight foamed concrete, mortar, and the like, and excellent in mechanical properties and waterproof properties formed from the waterproof composition. It relates to a waterproof membrane.
[0002]
[Prior art]
As for waterproofing methods for concrete buildings and the like, many techniques such as an asphalt waterproofing method, a modified asphalt waterproofing method, a sheet waterproofing method, and a coating film waterproofing method have been developed. In particular, the coating waterproofing method used by applying a composition comprising hydraulic cement, aggregate, and synthetic resin emulsion is known to be simple in construction and relatively easy to obtain desired waterproofing properties. Japanese Patent Publication No. 51-40371, Japanese Patent Publication No. 58-51570, Japanese Patent Publication No. 63-3106, Japanese Patent Publication No. 1-39713, Japanese Patent Publication No. 5-45539, Japanese Patent Publication No. 54-53140. JP-A-56-41286, JP-A-56-160357, JP-A-62-253648, JP-A-3-39387, JP-A-3-50146, etc. The technology is disclosed.
[0003]
When the waterproofing material composition disclosed in these publications is mixed with hydraulic cement, aggregate, and synthetic resin emulsion, the cement is hardened by a hydration reaction with water contained in the synthetic resin emulsion, In the synthetic resin emulsion, water as a dispersion medium is consumed by the hydration reaction of the hydraulic cement and dissipates out of the system by evaporation and diffusion. As a result, a coating film is formed relatively quickly.
[0004]
[Problems to be solved by the invention]
In order to form a coating film by applying or spraying a waterproof material composition comprising such hydraulic cement, aggregate, and synthetic resin emulsion on the surface of a concrete structure or the like, the waterproof material composition is used during the operation. It is necessary to form a coating film having a desired initial strength by quickly forming a coating film after completion of the coating operation. That is, the control of the initial viscosity of the waterproof material composition and the control of the film formation rate are important techniques.
[0005]
However, there has been a problem that the initial viscosity of the waterproof material composition composed of hydraulic cement, aggregate, and synthetic resin emulsion and the film formation rate are extremely sensitive to temperature. In fact, in such a coating waterproofing method, the viscosity of the waterproofing material composition and the coating film formation speed are affected by the temperature difference between summer and winter, so a skilled engineer determines the temperature conditions on the day of construction and determines the composition. We responded by changing the ratio slightly or adjusting the amount of water.
[0006]
However, changing the composition ratio of the product at the construction site at the discretion of the engineer is not a preferable response from the viewpoint of quality assurance, and changing the composition ratio means that the mechanical strength, waterproof performance, and basicity of the cured coating film are changed. There was a problem that the performance such as adhesion strength with the material was adversely affected and could cause variations in quality.
[0007]
The present invention solves such problems of the prior art and is excellent in initial viscosity and coating film forming speed even when the construction temperature changes, and has a small change in curing speed and excellent workability. An object of the present invention is to provide a waterproof film excellent in mechanical properties, waterproof properties and durability formed from the waterproof material composition.
[0008]
[Means for Solving the Problems]
That is, the present invention relates to a waterproof material composition that hardly changes in viscosity even when the construction temperature changes and has a small effect on curing time, and a waterproof film formed from the waterproof material composition.
[0009]
[Means for Solving the Problems]
That is, the present invention is a waterproof material composition comprising a hydraulic cement alumina cement , an aggregate, an ethylene-vinyl acetate copolymer emulsion of a synthetic resin emulsion , and a tartaric acid of oxycarboxylic acid. The waterproof material composition comprising an acid, wherein the polycarboxylic acid is a maleic anhydride / methoxypolyethylene glycol allyl ether copolymer or a maleic anhydride / methoxypolyethylene glycol vinyl ether copolymer. There, hydraulic cement composition comprising 20 to 80 parts by weight of hydraulic cement and aggregate 80-20 parts by weight, and, with respect to the hydraulic cement composition 100 parts by weight, synthetic resin emulsion 10-200 parts by weight (provided that Solids), 0.1-50 parts by weight of oxycarboxylic acid and polycarboxylic acid A said waterproof material composition comprising 10 parts by weight, and its, hydraulic cement, aggregate, synthetic resin emulsion, and the waterproof material composition characterized by comprising a mixture of hydroxycarboxylic acid It is a manufacturing method. Also, a waterproof film formed from the waterproof material composition, which is a method for forming a waterproof film characterized by applying the waterproof material composition, and spraying and applying the waterproof material composition This is a method for forming a waterproof film.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is described in detail below.
[0011]
The present invention contains a hydraulic cement composition comprising hydraulic cement and aggregate.
The hydraulic cement used in the present invention is not particularly limited, and hydraulic lime, Roman cement, natural cement, ordinary Portland cement, low heat Portland cement, early strength Portland cement, white Portland cement, high iron oxide Portland cement Titanium cement, manganese cement, chromium cement, alumina cement and the like can be used as a single cement or as a mixed cement.
Among these, ordinary portland cement, early-strength portland cement, and alumina cement are preferable. Alumina cement is superior in that it has excellent dispersibility, absorbs water easily, and has a high hydration rate, thereby improving drying properties. More preferred.
[0012]
The aggregate is not particularly limited, and aggregates such as crushed stone, gravel, cinnabar, limestone, calcium carbonate, silica, alumina, glass beads, glass fiber, glass powder, resin powder, and incinerated ash can be used. Among these, cinnabar is preferable.
[0013]
The composition ratio of the hydraulic cement composition of the present invention is preferably composed of 20 to 80 parts by weight of hydraulic cement and 80 to 20 parts by weight of aggregate, and 30 to 70 parts by weight of hydraulic cement and 70 to 30 parts by weight of aggregate. More preferably, it consists of. When the hydraulic cement composition deviates from this range, properties such as mechanical strength, waterproofness, and adhesion to the substrate may be deteriorated.
[0014]
The synthetic resin emulsion of the present invention is added to ensure the elongation performance of the waterproof coating material composition and to obtain the ability to follow cracks in the underlying concrete.
[0015]
The glass transition temperature of the synthetic resin in the synthetic resin emulsion is preferably 20 ° C. or lower, and more preferably 10 ° C. or lower. When the glass transition temperature exceeds 20 ° C., properties such as mechanical strength, waterproofness, and adhesion to the substrate, particularly cold resistance, of the resulting waterproof membrane may be deteriorated.
[0016]
Synthetic resin emulsions include polyvinyl acetate emulsion, ethylene / vinyl acetate copolymer emulsion, ethylene / vinyl acetate / acrylate copolymer emulsion, ethylene / vinyl acetate / methacrylate copolymer emulsion, ethylene / acrylic. Acid ester copolymer emulsion, ethylene / methacrylate copolymer emulsion, polyacrylate emulsion, polymethacrylate emulsion, polystyrene / acrylate emulsion, polystyrene / methacrylate emulsion, polychloroprene latex, Vinyl acetate / vinyl chloride copolymer emulsion, styrene / butadiene copolymer emulsion, polyacrylonitrile / butadiene copolymer emulsion Emissions, vinyl acetate / acrylic acid ester emulsion, vinyl acetate / methacrylic acid ester emulsion, styrene / acrylic acid ester emulsion, and styrene / methacrylic acid ester emulsion, and the like.
Among these, an ethylene / vinyl acetate copolymer emulsion is preferable because the added effect is great.
[0017]
In addition, you may use the synthetic resin emulsion manufactured using the polycarboxylic acid used by this invention as an emulsifier. In this case, for example, emulsion polymerization of the emulsion can be carried out in the presence of a commonly used emulsifier and polycarboxylic acid. When polycarboxylic acid is used as an emulsifier, it has the same effect as polycarboxylic acid described later.
[0018]
A so-called powder emulsion containing no water can also be used as the synthetic resin emulsion. When powder emulsion is used, all components except water can be made into one package, and it is convenient because it is only necessary to add water at the construction site.
[0019]
The amount of the synthetic resin emulsion added is preferably 40 to 200 parts by weight (but as solid content), more preferably 60 to 150 parts by weight, based on 100 parts by weight of the hydraulic cement composition. If it is less than 40 parts by weight, good coating film properties cannot be obtained, crack followability to the ground concrete is lowered, cracks occur in the coating film itself, and waterproofness and adhesion to the substrate are inferior. There is a fear. If it exceeds 200 parts by weight, the coating strength may be reduced.
[0020]
The solid content concentration of the synthetic resin in the synthetic resin emulsion is preferably 30 to 80 parts by weight and more preferably 50 to 60 parts by weight in 100 parts by weight of the synthetic resin emulsion. If the amount is less than 30 parts by weight, the viscosity is too high and workability may be lowered, or the waterproof film may not be uniformly applied. If the amount exceeds 80 parts by weight, the waterproof composition may be difficult to cure.
[0021]
The oxycarboxylic acid of the present invention ensures the proper kneading viscosity of the waterproof material composition and ensures the pot life necessary for construction.
Oxycarboxylic acid is an organic acid having a hydroxyl group and a carboxyl group in one molecule. Examples of oxycarboxylic acids include glycolic acid, lactic acid, hydroacrylic acid, α-oxybutyric acid, glyceric acid, tartronic acid, malic acid, tartaric acid, citric acid, and other aliphatic oxycarboxylic acids, gluconic acid, galactonic acid, and mannone. Examples include aldonic acids such as acids, and aromatic oxycarboxylic acids such as salicylic acid, m-oxybenzoic acid, p-oxybenzoic acid, gallic acid, mandelic acid, and tropic acid.
Among these, tartaric acid is preferable in terms of an appropriate pot life.
[0022]
The amount of oxycarboxylic acid added is preferably 0.3 to 20 parts by weight, more preferably 0.5 to 10 parts by weight, when the hydraulic cement composition is 100 parts by weight. If the added amount is less than 0.3 parts by weight, the increase in viscosity may be increased when the waterproofing composition is kneaded, and the pot life may be shortened. If the added amount exceeds 20 parts by weight, the hydration of the cement is delayed, There is a possibility that the curing time may be delayed to a practically unfavorable level, and the mechanical strength, waterproofness, adhesion to the base material, and the like of the resulting waterproof film may be inferior.
[0023]
In the present invention, it is preferable to add a polycarboxylic acid in terms of improving fluidity, improving workability, and facilitating ensuring a proper kneading viscosity of the waterproofing material composition at high temperatures.
The polycarboxylic acid is a homopolymer of ethylenically unsaturated carboxylic acid or carboxylic anhydride, or a copolymer of these monomers and other monomers, and these homopolymers and copolymers Water-soluble salts (such as alkali metal salts, alkaline earth metal salts, ammonium salts, and amine salts) may be used.
Examples of the ethylenically unsaturated carboxylic acid mentioned here include (meth) acrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, and citraconic acid.
Similarly, examples of the carboxylic acid anhydride include maleic anhydride and itaconic anhydride.
[0024]
Other monomers include olefin monomers such as ethylene, propylene, and isobutene, conjugated diene monomers such as butadiene, isoprene, and chloroprene, styrene, α-methylstyrene, vinyl toluene, chlorostyrene, And aromatic vinyl monomers such as styrene sulfonic acid, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 2-hydroxyethyl (meth) ) (Meth) acrylate monomers such as acrylate, N, N-dimethylaminoethyl (meth) acrylate, methoxypolyethylene glycol (meth) acrylate, and methoxypolypropylene glycol (meth) acrylate, methyl allyl ether, ethyl allyl ether Butyl allylene Allyl ether monomers such as tellurium, 2-ethylhexyl allyl ether and phenyl allyl ether, alkylene glycol (alkyl) allyl ether monomers such as (methoxy) polyethylene glycol allyl ether and (methoxy) polypropylene glycol allyl ether, methyl vinyl ether , Vinyl ether monomers such as ethyl vinyl ether, butyl vinyl ether, 2-ethylhexyl vinyl ether, and phenyl vinyl ether, alkylene glycol (alkyl) vinyl ether monomers such as (methoxy) polyethylene glycol vinyl ether and (methoxy) polypropylene glycol vinyl ether, vinyl acetate Fatty acid vinyl monomers such as vinyl propionate and (meth) acrylamide, α-ethyl (meth) acrylic Amide, N- butoxymethyl (meth) acrylamide, and N, N- dimethyl (meth) acrylamide, (meth) acrylamide monomer, (meth) acrylonitrile, and vinyl chloride.
[0025]
Among these polycarboxylic acids, maleic anhydride / methoxypolyethylene glycol allyl ether copolymer, maleic anhydride / methoxypolyethylene glycol vinyl ether copolymer, maleic anhydride / methoxypolyethylene glycol allyl ether / styrene copolymer, and A maleic anhydride / methoxypolyethylene glycol vinyl ether / styrene copolymer is preferred. Also preferred are the compounds described in JP-A-8-48852. Among these, a maleic anhydride / methoxypolyethylene glycol allyl ether copolymer and a maleic anhydride / methoxypolyethylene glycol vinyl ether copolymer are preferable in that the added effect is great.
[0026]
The polycarboxylic acid is preferably 0 to 10 parts by weight, more preferably 0.01 to 1.0 part by weight, and most preferably 0.1 to 1.0 part by weight with respect to 100 parts by weight of the hydraulic cement composition. Even if it exceeds 10 parts by weight, the workability is not improved, the curing time is delayed to a practically unfavorable level, or the mechanical strength, waterproofness, adhesion to the substrate, etc. of the resulting waterproofing film are inferior. There is a risk.
[0027]
The waterproof material composition of the present invention preferably uses water in order to form a protective film.
As water to be contained in the waterproof material composition, it is preferable to use only water contained in the synthetic resin emulsion in that extra water is not added at the work site and variation in physical properties can be prevented. However, when reducing the solid content of the emulsion, water may be added separately from the synthetic resin emulsion. Also, when using a powder emulsion, water may be added.
The amount of water added is adjusted so that the viscosity of the waterproof material composition is suitable for application or spraying on the surface of the adherend.
[0028]
The waterproof material composition of the present invention includes an AE agent, an AE water reducing agent, a high performance water reducing agent, a high performance AE water reducing agent, a separation reducing agent, a thickening agent, a high fluidizing agent, an anti-shrinkage agent, a rust preventive, Other components such as foaming agents, wetting agents and other concrete admixtures, blast furnace slag, asphalt emulsion, fibrous reinforcing materials, preservatives, colorants, and water repellents can be added.
[0029]
The waterproof material composition of the present invention is applied to the surface of an adherend such as a concrete building to form a waterproof film, but the method for forming the waterproof film is not particularly limited, and tools such as brushes, rollers, and trowels are used. It may be used by coating or sprayed with a spray gun or the like. In these, it is preferable to spray and apply | coat like a spray coating at the point which can apply | coat uniformly to a large-area application surface for a short time, and it is more preferable to apply by spraying with a spray gun.
[0030]
When constructing a waterproof membrane on the surface of an adherend such as a concrete building, as one of the embodiments, the surface of the adherend is previously applied for the purpose of improving the adhesion and waterproofness between the waterproof membrane and the adherend. A coating film is formed, and the waterproof film of the present invention can be laminated on the surface of the coating film. In another embodiment, a coating film can be laminated on the surface of the waterproof film for the purpose of improving the durability of the waterproof film. The material for forming such a coating film is not particularly limited, and includes asphalt, epoxy resin, urethane resin, unsaturated polyester resin, acrylic resin, and EVA resin.
[0031]
Further, as one of the embodiments of the present invention, for the purpose of improving the mechanical properties of the waterproof membrane, a knitted rebar, asphalt felt, nonwoven fabric, porous sheet, glass fiber, carbon fiber, resin sheet, etc. are used. It can also be laminated.
[0032]
【Example】
EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not restrict | limited by these Examples. However, the parts and% used in Examples and Comparative Examples are shown on a weight basis.
[0033]
In addition, the test evaluation method performed by the Example and the comparative example is as follows.
(1) The waterproofing material composition was blended in a thermostatic chamber controlled at an initial viscosity of 5 ° C., 20 ° C. or 30 ° C., and the viscosity of the composition after 1 hour was measured using a BH viscometer (No. 4 rotor, rotation speed). 10 rpm).
(2) In a thermostatic chamber controlled at a curing time of 5 ° C, 20 ° C or 30 ° C, the waterproofing material composition is poured into a 30 cm square Teflon mold, left to cast, and then cured by tactile sensation. Was measured.
(3) Tensile strength / breaking elongation JIS K 6301-2 dumbbell was cut out from a coating film (material age 7 days) having a thickness of about 1 mm obtained by casting and measured using a tensile tester (tensile speed 200 mm / min, distance between chucks 70 mm, measuring temperature 23 ° C.).
(4) Glass transition temperature of resin The synthetic resin emulsion was air-dried and measured using a differential scanning calorimeter.
[0034]
Reference Example 1 Manufacturing method of EVA emulsion (EVA-1) A stainless steel autoclave equipped with a stirrer was charged with 100 parts pure water, 70 parts vinyl acetate, 2.5 parts polyvinyl alcohol, 0.9 parts polyethylene glycol nonylphenyl ether, and 1.25 parts ammonium persulfate, The contents were sealed with nitrogen and sealed. Next, 29 parts of ethylene was injected and the content was heated to 65 ° C. to initiate polymerization. After the start of polymerization, 30 parts of vinyl acetate was continuously added over 5 hours, and the internal temperature was further raised to 75 ° C. and stirred for 2 hours to complete the polymerization.
[0035]
The properties of the obtained EVA emulsion are as follows.
Solid content: 55%
Glass transition temperature of resin: -13 ° C
[0036]
Reference Example 2 Production method of EVA emulsion (EVA-2) Same as Reference Example 1 except that 62 parts of vinyl acetate and 8 parts of 2-ethylhexyl acrylate were used instead of 70 parts of vinyl acetate charged in the initial stage. Was polymerized.
The properties of the obtained EVA are as follows.
Solid content: 55%
Glass transition temperature of resin: -19 ° C
[0037]
Reference Example 3 Production method of EVA emulsion (EVA-3) In Reference Example 1, polymerization was carried out in the same manner as in Reference Example 1 except that 0.85 part of polycarboxylic acid (B-1) was used as an emulsifier instead of polyethylene glycol nonylphenyl ether. did.
The properties of the obtained EVA are as follows.
Solid content: 55%
Glass transition temperature of resin: -13 ° C
[0038]
Reference Example 4 Production method of acrylic emulsion (acrylic-1) In a stainless steel autoclave equipped with a stirrer, pure water 80 parts, acrylic acid-n-butyl 25.5 parts, methyl methacrylate 3 parts, polyethylene glycol dimethacrylate 1.5 parts, polyethylene glycol nonylphenyl 4.0 parts of ether, 0.25 parts of sodium naphthalenesulfonate, and 1.25 parts of ammonium persulfate were charged, the atmosphere was replaced with nitrogen, and the mixture was sealed, and the temperature was raised to 65 ° C. to initiate polymerization. After the initiation of polymerization, a mixture of 59.5 parts of acrylic acid-n-butyl, 7 parts of methyl methacrylate, and 3.5 parts of polyethylene glycol dimethacrylate was continuously added over 5 hours, and the internal temperature was raised to 75 ° C for 2 hours. The polymerization was terminated by stirring.
The properties of the obtained acrylic resin are as follows.
Solid content: 55%
Glass transition temperature of resin: -36 ℃
[0039]
Experimental example 1
Alumina cement, cinnabar, synthetic resin emulsion, oxycarboxylic acid (hereinafter referred to as oxyacid in the table) and polycarboxylic acid were mixed in the formulation shown in Table 1, and performance evaluation as a waterproofing material composition and waterproofing film was performed. . The results are summarized in Table 2. However, the compounding quantity of the synthetic resin emulsion described in Table 1 was shown in terms of solid content.
[0040]
The materials used here are as follows.
Polycarboxylic acid B-1: poly (maleic anhydride / methoxypolyethylene glycol vinyl ether)
Polycarboxylic acid B-2: Poly (maleic anhydride / methoxypolyethylene glycol allyl ether)
Polycarboxylic acid B-3: Sodium polyacrylate Polycarboxylic acid B-4: Polyacrylic acid
[Table 1]
[Table 2]
Experimental example 2
EVA-1 was used as the synthetic resin emulsion, and the same procedure as in Experimental Example 1 was performed except that alumina cement, cinnabar, synthetic resin emulsion, oxycarboxylic acid, and polycarboxylic acid were mixed according to the formulation shown in Table 3. The results are summarized in Table 4. However, the compounding quantity of the synthetic resin emulsion described in Table 3 was shown in solid content conversion.
[0044]
[Table 3]
[Table 4]
Experimental example 3
EVA-1 was used as the synthetic resin emulsion, and the same procedure as in Experimental Example 1 was performed except that alumina cement, cinnabar sand, synthetic resin emulsion, oxycarboxylic acid, and polycarboxylic acid were mixed according to the formulation of Tables 5-6. . The results are summarized in Tables 7-8. However, the compounding quantity of the synthetic resin emulsion described in Tables 5-6 was shown in conversion of solid content.
[0047]
[Table 5]
[Table 6]
[Table 7]
[Table 8]
Experimental Example 4
EVA-1 was used as the synthetic resin emulsion, and the same procedure as in Experimental Example 1 was performed except that alumina cement, cinnabar sand, synthetic resin emulsion, oxycarboxylic acid, and polycarboxylic acid were mixed according to the formulation of Tables 9-10. . The results are summarized in Tables 11-12. However, the compounding quantity of the synthetic resin emulsion described in Tables 9-10 was shown in conversion of solid content.
[0052]
[Table 9]
[Table 10]
[Table 11]
[Table 12]
As is apparent from the experimental results, the initial viscosity at 5 to 30 ° C. of the waterproofing composition of the present invention is in the range of 3000 to 19800 cps, and the viscosity at 30 ° C. is 0.92 to 1.53 times the viscosity at 5 ° C. It can be seen that the influence of temperature is small. Also, the curing time at 5 to 30 ° C. is 5 minutes to 5 hours and the influence of temperature is small.
[0057]
Experimental Example 5
As Example 5, Experiment No. The waterproof material composition of 1-3 was sprayed and painted on the balcony floor of the building roof with a spray gun to form a waterproof film. The waterproof material composition could be sprayed and applied uniformly to the balcony floor having a large floor area in a short time, and the workability was good.
For comparison, as a comparative example 5-1, a commercially available waterproofing material composition (emulsion solution) was sprayed and applied in the same manner as in Example 5 with a spray gun. Since the viscosity of the waterproof material composition exceeded 20000 cps, the spray gun was clogged and spray coating could not be performed.
Further, as Comparative Example 5-2, a commercially available waterproofing material composition (emulsion solution) having a viscosity of 2000 cps was sprayed and applied in the same manner as in Example 5 using a spray gun. The commercially available waterproofing material composition separated and aggregates settled, the spray gun was clogged, and the floor surface was uneven and could not be applied uniformly.
Furthermore, as Comparative Example 5-3, when the waterproofing material composition of Comparative Example 5-1 was diluted to reduce the viscosity and sprayed in the same manner as in Example 5 with a spray gun, the waterproofing material composition was a material. As a result, the aggregate settled down, the spray gun was clogged, and the floor surface was uneven and could not be applied uniformly.
[0058]
【The invention's effect】
As described above, since the waterproof material composition of the present invention has a small temperature dependency of the initial viscosity and the curing rate, stable workability can be obtained without being affected by the environmental temperature at the construction site.
Moreover, the waterproof film obtained from the composition is excellent in mechanical strength and waterproofness. For this reason, the waterproof material composition of the present invention and the waterproof membrane formed therefrom are used for waterproofing concrete structures or preventing water leakage, neutralizing, preventing corrosion of concrete such as salt damage, repairing roads, floors, etc. It is very effectively used for water stoppage such as cracks and joints of precast concrete frames, water leakage prevention for water receiving tanks, water storage tanks, and the like.
Further, the composition has the following characteristics. The conventional waterproofing material composition cannot be spray-painted because it has a low viscosity and the aggregate is separated from the material, and there is only a high viscosity that cannot be spray-painted. However, the waterproof material composition of the present invention has a viscosity lower than that of the conventional product and satisfies both the properties that the aggregate does not separate the material. It can be sprayed onto the painted surface. Spray painting has a greater workability and industrial applicability because it has a larger coating amount per unit time than brushes, rollers and trowels, and is easy to paint on roof slopes and walls.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08839898A JP3969832B2 (en) | 1997-04-02 | 1998-04-01 | Waterproof material composition, process for producing the same, waterproof film and method for forming the same |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8400497 | 1997-04-02 | ||
| JP9-84004 | 1997-04-02 | ||
| JP08839898A JP3969832B2 (en) | 1997-04-02 | 1998-04-01 | Waterproof material composition, process for producing the same, waterproof film and method for forming the same |
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| Publication Number | Publication Date |
|---|---|
| JPH10330738A JPH10330738A (en) | 1998-12-15 |
| JP3969832B2 true JP3969832B2 (en) | 2007-09-05 |
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| JP08839898A Expired - Fee Related JP3969832B2 (en) | 1997-04-02 | 1998-04-01 | Waterproof material composition, process for producing the same, waterproof film and method for forming the same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3150565A1 (en) * | 2015-10-01 | 2017-04-05 | Wolfgang Wesner | Use of mortar based on aluminacement and sand |
| EP3250536A4 (en) * | 2015-01-26 | 2018-11-07 | United States Mineral Products Company | Corrosion resistant spray applied fire resistive materials |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002173643A (en) * | 2000-12-04 | 2002-06-21 | Kumekawa Kogyo:Kk | Coating composition |
| KR100917703B1 (en) * | 2007-06-01 | 2009-09-21 | (주)한아이비건설 | Elastic coating waterproofing agent and manufacturing method |
| NZ596720A (en) * | 2009-04-28 | 2013-05-31 | Infrastructure Technologies Ltd | CHANNEL AND WATER STORAGE LINER using ethylene vinyl acetate copolymer and cementius composition |
| JP5588647B2 (en) * | 2009-09-25 | 2014-09-10 | 菊水化学工業株式会社 | Emulsion paint with aggregate |
| CN108997812A (en) * | 2018-09-26 | 2018-12-14 | 河北晨阳工贸集团有限公司 | A kind of water-water multi-color is dedicated to exempt from priming paint black dry-powder putty and preparation method thereof |
-
1998
- 1998-04-01 JP JP08839898A patent/JP3969832B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3250536A4 (en) * | 2015-01-26 | 2018-11-07 | United States Mineral Products Company | Corrosion resistant spray applied fire resistive materials |
| EP3150565A1 (en) * | 2015-10-01 | 2017-04-05 | Wolfgang Wesner | Use of mortar based on aluminacement and sand |
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| Publication number | Publication date |
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| JPH10330738A (en) | 1998-12-15 |
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