JP6659385B2 - Hydraulic polymer cement composition and floor structure using the same - Google Patents
Hydraulic polymer cement composition and floor structure using the same Download PDFInfo
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Description
本発明は、下地コンクリート上に塗付厚み３〜５ｍｍ程度に塗り拡げて硬化させる水硬性ポリマーセメント組成物に関し、特には熱水と冷水が繰り返し流下しても防かび性を保持する、食品工場床に適した水硬性ポリマーセメント組成物に関する。 TECHNICAL FIELD The present invention relates to a hydraulic polymer cement composition which is applied on an underground concrete to a thickness of about 3 to 5 mm to be cured, and more particularly to a food factory which maintains mold resistance even when hot and cold water repeatedly flows down. The present invention relates to a hydraulic polymer cement composition suitable for floors.
従来、施工現場での混合作業が行いやすく、作業性、性能、仕上がり外観にムラが生じにくく、耐熱性、耐熱水性、耐磨耗性、耐衝撃性などが要求される床などの施工に使用されるポリウレタン系セメント組成物として、少なくとも水分散型ポリオールを含むポリオールと、ポリフェニレンポリメチルポリイソ シアネートである疎水性イソシアネートと、水硬性セメントを含む骨材とから成り、コンクリートである基体上に塗布厚み４ｍｍで硬化させた組成物であって、厚み４ｍｍであって９５℃５分熱水と２０℃１０分冷水の養生を１サイクルとして２０００サイクル後の収縮応力が４．０±２．０Ｎ／ｍｍ２であり、１３００サイクル経過後に反り上がりや表層の亀裂が生じることがないことを特徴とするポリウレタン系セメント組成物が提案されている（特許文献１）。 Conventionally, it is easy to perform mixing work at the construction site, it is hard to cause unevenness in workability, performance and finished appearance, and it is used for construction of floors and the like that require heat resistance, hot water resistance, abrasion resistance, impact resistance, etc. The polyurethane-based cement composition comprises a polyol containing at least a water-dispersible polyol, a hydrophobic isocyanate that is polyphenylene polymethyl polyisocyanate, and an aggregate containing hydraulic cement, and is applied on a concrete substrate. A composition cured to a thickness of 4 mm, having a thickness of 4 mm, and a contraction stress after 2000 cycles of curing of hot water at 95 ° C. for 5 minutes and cold water at 20 ° C. for 10 minutes as 4.0 ± 2.0 N / a mm 2, polyurethane-based cement composition, wherein the never upward warping and surface cracks occur after 1300 cycles elapse Has been proposed (Patent Document 1).
しかしながら、特許文献１に記載のポリウレタン系セメント組成物は、食品工場床で行なわれているような熱水と冷水が繰り返し流下する環境下においては、防かび性が十分でない場合があるという課題がある。 However, the polyurethane-based cement composition described in Patent Literature 1 has a problem that, in an environment in which hot water and cold water repeatedly flow down as performed on a food factory floor, the antifungal property may not be sufficient. is there.
本発明が解決しようとする課題は、食品工場床で行われているような熱水と冷水が繰り返し流下する環境下においても、十分な防かび性を保持し、作業性及び耐熱性に優れる、ポリウレタン系の水硬性ポリマーセメント組成物及びこれを塗付して硬化させた床構造を提供することにある。 The problem to be solved by the present invention is that, even under an environment where hot water and cold water repeatedly flow down as in food factory floors, retain sufficient mold resistance, and have excellent workability and heat resistance. An object of the present invention is to provide a polyurethane-based hydraulic polymer cement composition and a floor structure which is applied and cured.
請求項１記載の発明は、ポリオール、ポリイソシアネート、希釈剤、セメント、骨材及び水を含有してなる水硬性ポリマーセメント組成物であって、ポリオールはヒマシ油変性３官能ポリオールとビスフェノールＡ骨格を有する４官能ポリオールとポリエステルポリオールから成り、ヒマシ油変性３官能ポリオールは水酸基当量が２５０〜４００であり、ビスフェノールＡ骨格を有する４官能ポリオールは水酸基当量が２５０〜４５０であり、ポリエステルポリオールは分子量が１０００〜３０００であって水酸基当量が５００〜１５００であり、セメント及び骨材の合計部数は組成物全体１００重量部中の５０〜８０重量部であり、希釈剤はアジピン酸エステルを含み、さらにベンズイミダゾール系化合物から成る防かび剤を含むことを特徴とする水硬性ポリマーセメント組成物を提供する。 The invention according to claim 1 is a hydraulic polymer cement composition comprising a polyol, a polyisocyanate, a diluent, a cement, an aggregate and water, wherein the polyol comprises a castor oil-modified trifunctional polyol and a bisphenol A skeleton. It consists of a tetrafunctional polyol and a polyester polyol having a castor oil-modified trifunctional polyol having a hydroxyl equivalent of 250 to 400, a tetrafunctional polyol having a bisphenol A skeleton having a hydroxyl equivalent of 250 to 450, and a polyester polyol having a molecular weight of 1000. ０００3000, the hydroxyl equivalent is 500５００1,500, the total number of parts of cement and aggregate is 50〜80 parts by weight in 100 parts by weight of the whole composition, the diluent contains an adipate ester, and furthermore, benzimidazole It contains a fungicide consisting of Providing hydraulic polymer cement composition to.
請求項２記載の発明は、ポリイソシアネートはポリメチルポリフェニルポリイソシアネートであることを特徴とする請求項１記載の水硬性ポリマーセメント組成物を提供する。 The invention according to claim 2 provides the hydraulic polymer cement composition according to claim 1, wherein the polyisocyanate is polymethyl polyphenyl polyisocyanate.
請求項３記載の発明は、ポリエステルポリオールは両末端に水酸基を持ち且つアルキレン側鎖を持つポリエステルポリオールであることを特徴とする請求項１又は請求項２記載の水硬性ポリマーセメント組成物を提供する。 The invention according to claim 3 provides the hydraulic polymer cement composition according to claim 1 or 2, wherein the polyester polyol is a polyester polyol having hydroxyl groups at both ends and having an alkylene side chain. .
請求項４記載の発明は、請求項１乃至請求項３のいずれかに記載の水硬性ポリマーセメント組成物を、床下地コンクリート上に厚み３〜５ｍｍ塗布して硬化させたことを特徴とする床構造の塗布方法を提供する。 According to a fourth aspect of the present invention, there is provided a floor characterized in that the hydraulic polymer cement composition according to any one of the first to third aspects is applied to a base concrete having a thickness of 3 to 5 mm and hardened. A method of applying a structure is provided.
本発明の水硬性ポリマーセメント組成物及び床構造は、食品工場床で行われているような熱水と冷水が繰り返し流下する環境下においても、十分な防かび性を保持するという効果があり、また、組成物全体に対するセメント及び骨材の配合部数が比較的少ないため、下地コンクリート上に塗付する際の作業性に優れる効果がある。また、熱水と冷水が繰り返し流下しても反り上がりや剥離が生じることが無いという耐熱性を有するという効果がある。 The hydraulic polymer cement composition and floor structure of the present invention have an effect of maintaining sufficient mold resistance even under an environment where hot water and cold water repeatedly flow down as in food factory floors, In addition, since the number of blending parts of the cement and the aggregate with respect to the whole composition is relatively small, there is an effect that the workability at the time of application on the foundation concrete is excellent. In addition, there is an effect of having heat resistance such that warping or peeling does not occur even when hot water and cold water flow repeatedly.
以下本発明について詳細に説明する。 Hereinafter, the present invention will be described in detail.
本発明の水硬性ポリマーセメント組成物は、ポリオール、ポリイソシアネート、希釈剤、セメント、骨材及び水を含有してなる水硬性ポリマーセメント組成物であって、ポリオールはヒマシ油変性３官能ポリオールとビスフェノールＡ骨格を有する４官能ポリオールとポリエステルポリオールから成り、ヒマシ油変性３官能ポリオールは水酸基当量が２５０〜４００であり、ビスフェノールＡ骨格を有する４官能ポリオールは水酸基当量が２５０〜４５０であり、ポリエステルポリオールは分子量が１０００〜３０００であって水酸基当量が５００〜１５００であり、セメント及び骨材の合計部数は組成物全体１００重量部中の５０〜８０重量部であり、希釈剤はアジピン酸エステルを含み、さらにベンズイミダゾール系化合物から成る防かび剤を含むことを特徴とする水硬性ポリマーセメント組成物であり、必要に応じてこれらの他に、顔料や希釈剤、及び分散剤、消泡剤等の添加剤が配合することができる。また、本発明の床構造は、該水硬性ポリマーセメント組成物を、床下地コンクリート上に厚さ３〜５ｍｍ塗付して硬化させたものである。 The hydraulic polymer cement composition of the present invention is a hydraulic polymer cement composition comprising a polyol, a polyisocyanate, a diluent, cement, aggregate and water, wherein the polyol is a castor oil-modified trifunctional polyol and a bisphenol. Consisting of a tetrafunctional polyol having an A skeleton and a polyester polyol, a castor oil-modified trifunctional polyol has a hydroxyl equivalent of 250 to 400, a tetrafunctional polyol having a bisphenol A skeleton has a hydroxyl equivalent of 250 to 450, and the polyester polyol is The molecular weight is 1000 to 3000, the hydroxyl equivalent is 500 to 1500, the total number of parts of cement and aggregate is 50 to 80 parts by weight in 100 parts by weight of the whole composition, and the diluent contains adipic acid ester; Further prevention of benzimidazole compounds Agent is a hydraulic polymer cement composition characterized in that it comprises, in addition to those as required, pigments and diluents, and dispersing agents, additives such as defoaming agents can be incorporated. In addition, the floor structure of the present invention is obtained by applying the hydraulic polymer cement composition to a floor foundation concrete with a thickness of 3 to 5 mm and curing.
本発明の水硬性ポリマーセメント組成物に使用されるポリオールは、ヒマシ油変性３官能ポリオールとビスフェノールＡ骨格を有する４官能ポリオールとポリエステルポリオールから成る。 The polyol used in the hydraulic polymer cement composition of the present invention comprises a castor oil-modified trifunctional polyol, a tetrafunctional polyol having a bisphenol A skeleton, and a polyester polyol.
本発明の水硬性ポリマーセメント組成物に使用されるヒマシ油変性３官能ポリオールは、ヒマシ油及びその誘導体で、例えばヒマシ油脂肪酸のジグリセライド、モノグリセライド及びそれらの混合物であり、水酸基数が３のポリオールである。本発明に使用するヒマシ油変性３官能ポリオールの水酸基当量は、２５０〜４５０が好ましく、２５０未満では水系ポリウレタン組成物としての硬化が速くなって作業性が不良となり、４５０超では水系ポリウレタン組成物として硬化後の強度が不十分となる。 The castor oil-modified trifunctional polyol used in the hydraulic polymer cement composition of the present invention is castor oil and a derivative thereof, for example, a diglyceride of castor oil fatty acid, a monoglyceride and a mixture thereof, and a polyol having 3 hydroxyl groups. is there. The hydroxyl equivalent of the castor oil-modified trifunctional polyol used in the present invention is preferably from 250 to 450, and if it is less than 250, the curing as a water-based polyurethane composition is accelerated, resulting in poor workability. The strength after curing becomes insufficient.
本発明の水硬性ポリマーセメント組成物に使用されるビスフェノールＡ骨格を有する４官能ポリオールは、ビスフェノールＡ骨格を有するポリエポキシ化合物に活性水素化合物を反応させて得られるエポキシ開環ポリオールであり、水酸基当量は２５０〜４５０が好ましい。水酸基当量が２５０未満では水系ポリウレタン組成物としての硬化が速くなって作業性が不良となり、４５０超では水系ポリウレタン組成物として硬化後の強度が不十分となる。 The tetrafunctional polyol having a bisphenol A skeleton used in the hydraulic polymer cement composition of the present invention is an epoxy ring-opening polyol obtained by reacting an active hydrogen compound with a polyepoxy compound having a bisphenol A skeleton, and has a hydroxyl equivalent. Is preferably from 250 to 450. When the hydroxyl group equivalent is less than 250, the curing as a water-based polyurethane composition is accelerated and workability becomes poor, and when it exceeds 450, the strength after curing as a water-based polyurethane composition becomes insufficient.
本発明の水硬性ポリマーセメント組成物に使用されるポリエステルポリオールは、分子量が１０００〜３０００であって両末端に水酸基を持ち且つアルキレン側鎖を持つポリエステルポリオールが好ましく、該ポリエステルポリオールの水酸基当量は５００〜１５００である。該ポリエステルポリオールとしては、２−ブチル−エチル−１、３プロパンジオールとアジピン酸の重縮合物があり、具体的な製品としては、ＨＳ ２Ｂ−２２２Ａ（商品名、豊国製油社製）がある。 The polyester polyol used in the hydraulic polymer cement composition of the present invention is preferably a polyester polyol having a molecular weight of 1,000 to 3,000, having hydroxyl groups at both ends and having an alkylene side chain, and the hydroxyl equivalent of the polyester polyol is 500. １1500. Examples of the polyester polyol include a polycondensate of 2-butyl-ethyl-1,3-propanediol and adipic acid, and specific products include HS 2B-222A (trade name, manufactured by Toyokuni Oil Co., Ltd.).
本発明の水硬性ポリマーセメント組成物に使用するポリイソシアネートは、作業性が良好となり、また低温での速硬化性さらには硬化後の強度が高いことより、４，４´−ジフェニルメタンジイソシアネートからなるポリメリックＭＤＩ（ポリメチルポリフェニルポリイソシアネート）を使用することが好ましく、ＮＣＯ当量は１００〜１５０が好ましい。ＮＣＯ当量が１００未満では硬化物が発泡による膨れが生じる等で仕上がりが不良となり、ＮＣＯ当量が１５０超では硬化後の強度が不十分となる。もちろん、他の脂肪族ポリイソシアネートや芳香族ポリイソシアネートや脂環式ポリイソシアネート等も使用することもでき、また併用することも可能である。 The polyisocyanate used in the hydraulic polymer cement composition of the present invention has good workability, and has a high curability at a low temperature and a high strength after curing. Therefore, the polymer composed of 4,4′-diphenylmethane diisocyanate can be used. It is preferable to use MDI (polymethyl polyphenyl polyisocyanate), and the NCO equivalent is preferably 100 to 150. If the NCO equivalent is less than 100, the cured product will be swelled due to foaming or the like, resulting in poor finish. If the NCO equivalent exceeds 150, the strength after curing will be insufficient. Of course, other aliphatic polyisocyanates, aromatic polyisocyanates, alicyclic polyisocyanates, and the like can be used, and can be used in combination.
ポリオール及びアルコール化合物の水酸基一個に対するイソシアネート基の数は、５．５〜６．５が好ましく、５．５未満では硬化が遅延し、６．５超では硬化物に炭酸ガスによる発泡が生じる場合がある。 The number of isocyanate groups with respect to one hydroxyl group of the polyol and the alcohol compound is preferably 5.5 to 6.5, and if it is less than 5.5, curing is delayed, and if it exceeds 6.5, foaming due to carbon dioxide gas may occur in the cured product. is there.
本発明の水硬性ポリマーセメント組成物には希釈剤を含有し、該希釈剤にはアジピン酸エステルが含まれる。アジピン酸エステルとしてはアジピン酸ジイソノニルが好ましく、上記ポリオールと希釈剤と水を混合して１液とし、主剤として形成することが好ましい。希釈剤にはアジピン酸エステルの他、スルホン酸エステル化合物を配合することが出来、また該主剤には塗材を着色するためのトナーを配合することが出来る。 The hydraulic polymer cement composition of the present invention contains a diluent, and the diluent includes an adipate. As the adipic acid ester, diisononyl adipate is preferable, and the above-mentioned polyol, diluent and water are mixed to form one liquid, and it is preferable to form it as a main ingredient. The diluent may include a sulfonic acid ester compound in addition to the adipic acid ester, and the main agent may include a toner for coloring a coating material.
希釈剤は、ポリオールとポリイソシアネートと希釈剤と水からなる樹脂部１００重量部中１０〜３０重量部であり、１０重量部未満では硬化物の収縮応力が高くなり耐熱性が低下し、３０重量部超では硬化物の強度が低下する。希釈剤中のアジピン酸エステルの含有割合は３０％以上１００％以下が好ましい。３０%未満では硬化物の収縮応力が高くなり耐熱性が低下する。 The diluent is 10 to 30 parts by weight in 100 parts by weight of the resin part composed of a polyol, a polyisocyanate, a diluent and water. If the amount exceeds the limit, the strength of the cured product decreases. The content ratio of adipic acid ester in the diluent is preferably 30% or more and 100% or less. If it is less than 30%, the shrinkage stress of the cured product increases, and the heat resistance decreases.
本発明の水硬性ポリマーセメント組成物に使用するベンズイミダゾール系化合物から成る防かび剤は、熱に対する安定性とｐＨに対する安定性が高いため、熱水洗浄が行われ、組成物としてセメントを含有する本発明である水硬性ポリマーセメント組成物に適する防かび剤として使用される。市販品として１０％水懸濁液としてコートサイドＤ２（商品名、日本エンバイロケミカルズ株式会社製）がある。ベンズイミダゾール系化合物から成る防かび剤の配合量は、組成物全体１００重量部に対して０．０１〜０．１重量部が好ましい。０．０１重量部未満では防かび効果が不十分であり、０．１重量部超ではコスト高と成る。 The fungicide composed of the benzimidazole compound used in the hydraulic polymer cement composition of the present invention has high stability to heat and stability to pH, so that it is washed with hot water and contains cement as a composition. It is used as a fungicide suitable for the hydraulic polymer cement composition of the present invention. A commercially available product is Courtside D2 (trade name, manufactured by Nippon Environmental Chemicals Co., Ltd.) as a 10% aqueous suspension. The compounding amount of the fungicide comprising the benzimidazole compound is preferably 0.01 to 0.1 part by weight based on 100 parts by weight of the whole composition. If the amount is less than 0.01 part by weight, the fungicidal effect is insufficient, and if it exceeds 0.1 part by weight, the cost increases.
本発明の水硬性ポリマーセメント組成物に使用するセメントは、本発明の水系ポリウレタン組成物が床下地コンクリートに塗布し美観を付与することを目的としているため、特定の色調が付与できるように、主として白色ポルトランドセメントを使用することが好ましい。他に普通ポルトランドセメント、アルミナセメント、高炉セメント、早強ポルトランドセメントを併用することができる。セメントの配合量は組成物全体１００重量部中の２０〜４０重量部である。 The cement used in the hydraulic polymer cement composition of the present invention is intended to impart an aesthetic appearance by applying the water-based polyurethane composition of the present invention to the concrete floor, so that a specific color tone can be imparted, It is preferred to use white Portland cement. In addition, ordinary Portland cement, alumina cement, blast furnace cement, and early strength Portland cement can be used in combination. The amount of cement is 20 to 40 parts by weight based on 100 parts by weight of the whole composition.
本発明の水硬性ポリマーセメント組成物に使用する骨材には、粒子径が０．０５３〜０．６０ｍｍの硅砂と、粒子径が０．１５〜０．８５ｍｍの硅砂を併用して使用することが好ましい。粒子径が１．０ｍｍ超では床下地コンクリートへの塗布作業性が悪くなり、硬化後の表面の平滑性が不十分と成る。 For the aggregate used in the hydraulic polymer cement composition of the present invention, silica sand having a particle diameter of 0.053 to 0.60 mm and silica sand having a particle diameter of 0.15 to 0.85 mm are used in combination. Is preferred. If the particle diameter is more than 1.0 mm, the workability of application to the concrete floor will deteriorate, and the surface smoothness after curing will be insufficient.
粒子径が０．０５３〜０．６０ｍｍの硅砂は６号硅砂が、粒子径が０．１５〜０．８５ｍｍの硅砂は硅砂５号が、それぞれ該当する。粒子径が０．０５３〜０．６０ｍｍの硅砂と粒子径が０．１５〜０．８５ｍｍの硅砂の配合比率は２．０〜３．０：１が床下地コンクリートへの塗布作業性と強度発現及び耐衝撃性の観点から好ましい。これらの骨材である硅砂の合計量が組成物全体に対する割合は、組成物全体１００重量部中３０〜４０重量部である。３０重量部未満では硬化物表面に樹脂が浮いて防滑性が低下し、４０重量部超では塗布作業性が不良となる。 Silica sand having a particle diameter of 0.053 to 0.60 mm corresponds to No. 6 silica sand, and silica sand having a particle diameter of 0.15 to 0.85 mm corresponds to silica sand No. 5. The mixing ratio of silica sand having a particle diameter of 0.053 to 0.60 mm and silica sand having a particle diameter of 0.15 to 0.85 mm is 2.0 to 3.0: 1, and the workability of application to floor foundation concrete and the development of strength are exhibited. It is preferable from the viewpoint of impact resistance. The ratio of the total amount of silica sand as these aggregates to the whole composition is 30 to 40 parts by weight based on 100 parts by weight of the whole composition. If the amount is less than 30 parts by weight, the resin floats on the surface of the cured product, and the slip resistance is reduced. If the amount is more than 40 parts by weight, the coating workability is poor.
本発明の水硬性ポリマーセメント組成物には、上記のほかに消石灰を配合することが好ましい。該消石灰は、ポリイソシアネートと水とのウレア反応で発生する炭酸ガスを吸収し、組成物が床下地コンクリート上に塗布され硬化するまでに発生する炭酸ガスが特定部分に集中して塗膜を押上げて膨れを生じさせることを抑制する効果がある。 It is preferable to add slaked lime to the hydraulic polymer cement composition of the present invention in addition to the above. The slaked lime absorbs the carbon dioxide gas generated by the urea reaction between the polyisocyanate and water, and the carbon dioxide gas generated before the composition is applied on the concrete foundation and hardens is concentrated on a specific portion to push the coating film. This has the effect of suppressing the occurrence of swelling.
以下，実施例及び比較例にて具体的に説明する。 Hereinafter, the present invention will be described specifically with reference to Examples and Comparative Examples.
実施例
水酸基当量が３５０のヒマシ油変性３官能ポリオールを１２６〜１４４重量部と、水酸基当量が３６０のビスフェノールＡ骨格を有する４官能ポリオールを１１〜２９重量部と、希釈剤としてスルホン酸エステル化合物（メザモール；商品名、バイエル社製）を７２〜９０重量部と、水（イオン交換水）１１０重量部を含み全体として３６０重量部となり且つ水酸基当量が７３０となるポリオールと水と希釈剤の混合物に、ポリエステルポリオールとして、ＨＳ ２Ｂ−２２２Ａを６０重量部と、アジピン酸ジイソノニルを５０重量部と、ベンズイミダゾール系化合物から成る防かび剤としてコートサイドＤ２（１０％水懸濁液）１２重量部と着色トナー３０重量部を混合して実施例の水硬性ポリマーセメント組成物の主剤とした。またポリイソシアネートとして、ポリメリックＭＤＩ（ポリメチルポリフェニルポリイソシアネート） ルプラネートＭＢ−５Ｓ（商品名、ＢＡＳＦ ＩＮＯＡＣポリウレタン株式会社製、ＮＣＯ重量％：３１．４〜３２．６％）５００重量部を実施例の水硬性ポリマーセメント組成物の硬化剤とした。また骨材には、粒子径が０．１５〜０．８５ｍｍの硅砂：東北硅砂５号（商品名、東北硅砂株式会社製）３００重量部と、粒子径が０．０５３〜０．６０ｍｍの硅砂：東北硅砂６号（商品名、東北硅砂株式会社製）７５０重量部を使用し、セメントとして白色ポルトランドセメント（太平洋セメント社製）を１０００重量部を使用して実施例の水硬性ポリマーセメント組成物の骨材及びセメントとした。
Example 126 to 144 parts by weight of a castor oil-modified trifunctional polyol having a hydroxyl equivalent of 350, 11 to 29 parts by weight of a tetrafunctional polyol having a bisphenol A skeleton having a hydroxyl equivalent of 360, and a sulfonic acid ester compound ( (Mezamol; trade name, manufactured by Bayer AG) is a mixture of polyol, water and diluent having a total weight of 360 parts by weight including 72 to 90 parts by weight and 110 parts by weight of water (ion-exchanged water) and having a hydroxyl equivalent of 730. 60 parts by weight of HS 2B-222A as a polyester polyol, 50 parts by weight of diisononyl adipate, and 12 parts by weight of coatside D2 (10% aqueous suspension) as a fungicide composed of a benzimidazole compound. 30 parts by weight of the toner were mixed and used as a main component of the hydraulic polymer cement composition of the example. Further, as a polyisocyanate, 500 parts by weight of polymeric MDI (polymethyl polyphenyl polyisocyanate) luplanate MB-5S (trade name, manufactured by BASF INOAC Polyurethane Co., Ltd., NCO weight%: 31.4 to 32.6%) was used in Examples. It was used as a curing agent for the hydraulic polymer cement composition. The aggregate includes silica sand having a particle size of 0.15 to 0.85 mm: 300 parts by weight of Tohoku silica sand No. 5 (trade name, manufactured by Tohoku silica sand Co., Ltd.) and silica sand having a particle size of 0.053 to 0.60 mm. : Hydraulic polymer cement composition of Example using 750 parts by weight of Tohoku silica sand No. 6 (trade name, manufactured by Tohoku silica sand Co., Ltd.) and 1000 parts by weight of white Portland cement (manufactured by Taiheiyo Cement Corporation) as cement Aggregate and cement.
骨材とセメントは、上記２種類の硅砂と白色ポルトランドセメントを予め均一に混合し、さらにこれらの他に消石灰７０重量部を加えて実施例の水系ポリウレタン組成物のセメント骨材部とした。床下地コンクリートへの塗布及び下記評価項目の評価に当たっては上記実施例の主剤５１６重量部と実施例の硬化剤５００重量部と実施例のセメント骨材部２１２０重量部を配合して均一に混合したものを、実施例の水硬性ポリマーセメント組成物とした。 The above-mentioned two kinds of silica sand and white Portland cement were uniformly mixed in advance, and 70 parts by weight of slaked lime were added to the aggregate and cement to obtain a cement aggregate portion of the aqueous polyurethane composition of Example. For application to the floor foundation concrete and evaluation of the following evaluation items, 516 parts by weight of the main agent of the above example, 500 parts by weight of the hardener of the example, and 2120 parts by weight of the cement aggregate part of the example were blended and uniformly mixed. This was used as the hydraulic polymer cement composition of the example.
比較例１
上記実施例のベンズイミダゾール系化合物から成る防かび剤に代えて有機ヨウ素系化合物から成る防かび剤であるコートサイドＰＨ２（商品名、日本エンバイロケミカル株式会社製）を使用した以外は、実施例と同一にしたものを比較例１の水硬性ポリマーセメント組成物とした。
Comparative Example 1
The same procedures as in the above Examples except that the fungicide consisting of an organic iodine compound was used in place of the fungicide consisting of an organic iodine-based compound, that is, Courtside PH2 (trade name, manufactured by Nippon Environmental Chemical Co., Ltd.) in place of the fungicide consisting of the benzimidazole-based compound. The same was used as the hydraulic polymer cement composition of Comparative Example 1.
比較例２
上記実施例において、ベンズイミダゾール系化合物から成る防かび剤を配合しない主剤を使用した以外は、実施例と同一にしたものを比較例２の水硬性ポリマーセメント組成物とした。
Comparative Example 2
A hydraulic polymer cement composition of Comparative Example 2 was prepared in the same manner as in the above example, except that a main agent comprising a benzimidazole compound and not containing a fungicide was used.
評価項目及び評価方法Evaluation items and evaluation methods
圧縮強度
２３℃下にて７日養生後の実施例、比較例１又は比較例２の水硬性ポリマーセメント組成物の硬化物について、ＪＩＳＫ ６９１１の規定に準じて圧縮強さ（Ｎ/ｍｍ２）を測定した。
Compressive strength (N / mm 2 ) of the cured product of the hydraulic polymer cement composition of Example, Comparative Example 1 or Comparative Example 2 after curing at 23 ° C. for 7 days in accordance with JIS K 6911 Was measured.
耐衝撃性
２３℃下でＪＩＳＡ５３７１の３００ｍｍ×３００ｍｍ×厚さ６０ｍｍの乾燥したコンクリート平板（ケット水分計ＨＩ−５２０コンクリートレンジにて５％以下）の表面に、均一に混合した実施例、比較例１又は比較例２の水硬性ポリマーセメント組成物を厚さ３〜５ｍｍに金ゴテで塗布して７日間養生し、中央部に高さ１ｍから１ｋｇの鋼球を３０回落下させ、塗膜に割れ、剥がれ等の異常のないものを○、割れ、剥がれ等の異常が生じたものを×と評価した。
Example, Comparative Example 1 in which the material was uniformly mixed on the surface of a 300 mm x 300 mm x 60 mm dried concrete flat plate (5% or less in a KIT moisture meter HI-520 concrete range) of JIS 5371 under an impact resistance of 23 ° C. Alternatively, apply the hydraulic polymer cement composition of Comparative Example 2 to a thickness of 3 to 5 mm with a gold iron and cure for 7 days, drop a steel ball of 1 kg in height from 1 m to the center 30 times, and crack the coating. , Those having no abnormalities such as peeling were evaluated as 、, and those having abnormalities such as cracking and peeling were evaluated as x.
耐熱衝撃性
ＪＩＳＡ５３７１の３００ｍｍ×３００ｍｍ×厚さ６０ｍｍの乾燥したコンクリート平板（ケット水分計ＨＩ−５２０コンクリートレンジにて５％以下）を４分の１にカットして１５０ｍｍ×１５０ｍｍ×厚さ６０ｍｍの試験板とし、該の試験板の表面に均一に混合した実施例、比較例１又は比較例２の水硬性ポリマーセメント組成物を厚さ３〜５ｍｍに塗布し７日間養生する。その後試験体中央部に９５℃熱水を５分流下させ次に２０℃の冷水を１０分流下させることを１サイクルとして２０００サイクル繰り返し、塗膜に剥がれ、浮き等異常が生じないものを○、異常が生じたものを×と評価した。
Thermal shock resistance A 300 mm x 300 mm x 60 mm thick dried concrete flat plate (5% or less with a HI-520 concrete moisture meter) cut to 1/4 according to JIS 5371 and a 150 mm x 150 mm x 60 mm thickness test A hydraulic polymer cement composition of Example, Comparative Example 1 or Comparative Example 2 uniformly mixed on the surface of the test plate is applied to a thickness of 3 to 5 mm and cured for 7 days. Thereafter, a cycle of 95 ° C. hot water flowing down to the center of the test piece for 5 minutes and then 20 ° C. cold water flowing down for 10 minutes was repeated as 2000 cycles. Those having an abnormality were evaluated as x.
付着性
２３℃下でＪＩＳＡ５３７１の３００ｍｍ×３００ｍｍ×厚さ６０ｍｍの乾燥したコンクリート平板（ケット水分計ＨＩ−５２０コンクリートレンジにて５％以下）の表面に、均一に混合した実施例、比較例１又は比較例２の水硬性ポリマーセメント組成物を厚さ３〜５ｍｍに金ゴテで塗布して７日間養生し、建研式接着力試験器により、４０×４０ｍｍ部分の水硬性ポリマーセメント組成物とコンクリート平板との付着強度を測定した。破壊状態は下地コンクリート１００％凝集破壊を○と、それ以外を×と評価した。
Example, Comparative Example 1 or Comparative Example 1 uniformly mixed on the surface of a 300 mm x 300 mm x 60 mm dried concrete flat plate (5% or less with a quette moisture meter HI-520 concrete range) of JIS 5371 under an adhesiveness of 23C. The hydraulic polymer cement composition of Comparative Example 2 was applied to a thickness of 3 to 5 mm with a gold trowel and cured for 7 days, and a 40 × 40 mm portion of the hydraulic polymer cement composition was mixed with concrete using a Kenken-type adhesion tester. The adhesion strength to the flat plate was measured. The fracture state was evaluated as ○ for 100% cohesive failure of the foundation concrete, and as × for the others.
防かび性
２３℃下にて７日養生後の実施例、比較例１又は比較例２の水硬性ポリマーセメント組成物の硬化物について、９５℃熱水を５分流下させ次に２０℃の冷水を１０分流下させることを１サイクルとした熱衝撃を１００回と２５０回加え、その後の試験体について、ＪＩＳ Ｚ ２９１１ かび抵抗性試験方法（プラスチック製品の試験（方法Ａ：乾式法）に準じ、シャーレ中の試験体（５ｃｍ×５ｃｍ）上に試験かび混合胞子を付着乾燥させた磁器素焼き板を置き、ガラス板を載せ蓋をする。２６±２℃で４週間培養し、菌糸の発育の様子を観察し、以下によって評価した。Ａ法培地は無機塩寒天培地であり、試験菌はＡｓｐｅｒｇｉｌｌｕｓ ｎｉｇｅｒ、Ｐｅｎｉｃｉｌｌｉｕｍ ｐｉｎｏｐｈｉｌｕｍ、Ｐａｅｃｉｌｏｍｙｃｅｓ ｖａｒｉｏｔｉｉ、Ｔｒｉｃｈｏｄｅｒｍａ ｖｉｒｅｎｓ、及びＣｈａｅｔｏｍｉｕｍ ｇｌｏｂｏｓｕｍである。
０：肉眼及び顕微鏡下でかびの発育は認められない。
１：肉眼でかびの発育が認められ、顕微鏡下では明らかに確認できる。
２：肉眼でかびの発育が認められ、発育部分の面積は試料の全面積の２５％未満。
３：肉眼でかびの発育が認められ、発育部分の面積は試料の全面積の２５％以上〜５０％未満。
４：菌糸はよく発育し、発育部分の面積は全面積の５０％以上。
５：菌糸の発育は激しく、試料全面を覆っている。
EXAMPLE 7 days after curing at antifungal properties 23 ° C. under the cured product of Comparative Example 1 or Comparative Example 2 hydraulic polymer cement composition, cold water and then 20 ° C. passed down 5 min 95 ° C. hot water 100 times and 250 times of thermal shocks in which 1 cycle was caused to flow down for 10 minutes, and then the test specimens were subjected to the JIS Z 2911 mold resistance test method (according to the plastic product test (method A: dry method), Place the test mold mixed spores on a test piece (5 cm x 5 cm) in a petri dish, place a dried porcelain plate, cover with a glass plate, cover the plate, incubate for 4 weeks at 26 ± 2 ° C, and develop mycelium. The method A medium was an inorganic salt agar medium, and the test bacteria were Aspergillus niger, Penicillium pinophilum, and Paecilomyces va. riotii, Trichoderma virens, and Chaetomium globosum.
0: No mold development was observed with the naked eye or under a microscope.
1: Mold growth is observed with the naked eye, and can be clearly confirmed under a microscope.
2: Mold growth was observed with the naked eye, and the area of the growing portion was less than 25% of the total area of the sample.
3: Mold growth was observed with the naked eye, and the area of the growing portion was 25% or more to less than 50% of the total area of the sample.
4: Mycelia grow well, and the area of the growing part is 50% or more of the whole area.
5: The growth of mycelium was intense and covered the entire surface of the sample.
評価結果
評価結果を表１に示す。
The evaluation results evaluation results are shown in Table 1.
Claims (4)
A method for applying a floor structure , comprising applying the hydraulic polymer cement composition according to any one of claims 1 to 3 to a foundation ground concrete with a thickness of 3 to 5 mm and curing the applied composition.
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