JP5389399B2 - Polyurethane cement composition - Google Patents

Polyurethane cement composition Download PDF

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JP5389399B2
JP5389399B2 JP2008224253A JP2008224253A JP5389399B2 JP 5389399 B2 JP5389399 B2 JP 5389399B2 JP 2008224253 A JP2008224253 A JP 2008224253A JP 2008224253 A JP2008224253 A JP 2008224253A JP 5389399 B2 JP5389399 B2 JP 5389399B2
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polyol
cement
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polyurethane
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JP2010058997A (en
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俊行 石塚
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Aica Kogyo Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/60Flooring materials

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

Description

本発明は、高光沢となるポリウレタン系セメント組成物に関するものである。   The present invention relates to a polyurethane cement composition having high gloss.

従来、厨房室、試験室、薬品・化学工場、電子回路の工場などの床には防水性、耐熱性、耐薬品性、耐熱水性並びに耐衝撃強度などの機能を付加させるため、打設したコンクリート表面に強化樹脂を施工した複合床や、ウレタン樹脂、エポキシ樹脂などの熱硬化性樹脂とセメントとを配合した樹脂モルタル系の床が施工されている。特に、水硬性セメント、水、ポリオールおよびイソシアネート化合物からなるポリウレタン系セメント塗り床材は、熱や機械的な衝撃強度に優れるため、大きな負荷のかかる部位の床に施工される。   Conventionally, concrete that has been cast in order to add functions such as waterproofness, heat resistance, chemical resistance, hot water resistance, and impact strength to floors in kitchen rooms, test rooms, chemical and chemical factories, electronic circuit factories, etc. Composite floors with reinforced resin on the surface and resin mortar floors with cement and thermosetting resins such as urethane resin and epoxy resin are being constructed. In particular, polyurethane-based cement-coated flooring materials composed of hydraulic cement, water, polyol, and isocyanate compounds are excellent in heat and mechanical impact strength, and are therefore applied to floors where heavy loads are applied.

水硬性セメント、水、セメント減水剤、及び、硬化して樹脂となり得る成分からなるセメント組成物は施工現場での混合にて均一に分散されやすく、作業性・性能・仕上がり外観にムラが生じにくいことが開示されている。(特許文献1)   Cement composition consisting of hydraulic cement, water, cement water reducing agent, and components that can harden to become resin is easily dispersed evenly by mixing at the construction site, and unevenness in workability, performance, and finished appearance is unlikely to occur. It is disclosed. (Patent Document 1)

(a)水硬性セメント、(b)骨材、(c)イソシアネート基を含む化合物、(d)水、(e)3級アミン化合物触媒、および、(f)活性水素含有化合物(ただし水および3級アミン化合物触媒を除く)、を必須成分とするポリウレタン系セメント組成物が良好な仕上がり外観となることが開示されている。(特許文献2)   (A) hydraulic cement, (b) aggregate, (c) compound containing isocyanate group, (d) water, (e) tertiary amine compound catalyst, and (f) active hydrogen-containing compound (however, water and 3) It is disclosed that a polyurethane-based cement composition having an essential component (excluding a secondary amine compound catalyst) has an excellent finished appearance. (Patent Document 2)

水硬性セメント、水、骨材、ひまし油系ポリオール等の疎水性のポリオール、及び、ひまし油系ポリオール等の疎水性ポリオールとジイソシアネート化合物の反応で得られるイソシアネート基末端プレポリマーを含有するイソシアネート成分からなるポリマーセメント組成物が高耐久性塗り床材となることを開示している。(特許文献3)   Hydrophobic cement, water, aggregate, hydrophobic polyol such as castor oil-based polyol, and polymer comprising an isocyanate component containing an isocyanate group-terminated prepolymer obtained by reaction of a hydrophobic polyol such as castor oil-based polyol with a diisocyanate compound It discloses that the cement composition is a highly durable floor covering. (Patent Document 3)

ポリエステルポリオール、イソシアネート化合物並びに水硬性セメントを含む骨材を配合してなる樹脂セメント組成物により、塗膜厚みが5mm以下においても、表面の樹脂成分だけからなる層と骨材を含む中心部の層の収縮率が異ならず、反り上がり現象や表層の亀裂誘発ななくなることが開示されている。(特許文献4)   A resin cement composition comprising a polyester polyol, an isocyanate compound and an aggregate containing hydraulic cement, and a layer consisting only of the resin component on the surface and a central layer containing aggregate even when the coating thickness is 5 mm or less It is disclosed that there is no difference in the shrinkage rate, and no warping phenomenon or surface cracking is induced. (Patent Document 4)

水硬性セメント、水、ポリオール、骨材、イソシアネート化合物を含むポリウレタン系セメントにおいて、硬化後の60度鏡面光沢度が5.0以上90以下である塗り床材、ポリオールが水分散性であり、イソシアネート化合物がポリメリックMDIで、このポリメリックMDIの2、4’−MDIが6重量%以下でかつNCO重量%を25%以下であるポリウレタン系セメント組成物が光沢度が5.0以上となり、耐汚染性すなわち汚染除去性が高いことが開示されている。(特許文献5)

特開平8−169744号公報 特開平11−79820号公報 特開2000−72507号公報 特開2005−47719号公報 特開2007−254179号公報
Hydraulic cement, water, polyol, aggregate, polyurethane-based cement containing isocyanate compound, coated flooring having a 60 ° specular gloss after curing of 5.0 to 90, polyol is water-dispersible, and isocyanate The compound is polymeric MDI, 2,4'-MDI of this polymeric MDI is 6% by weight or less and the NCO weight% is 25% or less, and the polyurethane cement composition has a glossiness of 5.0 or more and is resistant to contamination. That is, it is disclosed that the decontamination property is high. (Patent Document 5)

JP-A-8-169744 JP 11-79820 A JP 2000-72507 A JP-A-2005-47719 JP 2007-254179 A

しかし、前記特許文献5を採用するとNCO%を低減させ、硬化物の強度が低下し、不具合を生じることがあった。   However, when the above-mentioned Patent Document 5 is adopted, NCO% is reduced, the strength of the cured product is lowered, and a problem may occur.

解決しようとする課題は、高光沢となり、耐汚染性が高いポリウレタン系セメント組成物の提供である。   The problem to be solved is to provide a polyurethane-based cement composition having high gloss and high stain resistance.

請求項1の発明は、水硬性セメント、水、ポリオール、イソシアネート化合物を含むポリウレタン系セメント組成物であって、水とポリオールからポリオール組成物の水比率が40〜10重量%であるエマルジョンが形成され、尿素が含まれることを特徴とするポリウレタン系セメント組成物で、高光沢となり、耐汚染性が高いものとなる。
請求項2の発明は、上記ポリウレタン系組成物の使途が塗床であること特徴とする請求項1に記載のポリウレタン系セメント組成物で、本発明の効果が最も発揮される使途となる。
The invention of claim 1 is a polyurethane-based cement composition containing hydraulic cement, water, a polyol, and an isocyanate compound, wherein an emulsion having a water ratio of 40 to 10% by weight of the polyol composition is formed from water and the polyol. A polyurethane-based cement composition characterized by containing urea, having high gloss and high stain resistance.
The invention according to claim 2 is the polyurethane-based cement composition according to claim 1, wherein the use of the polyurethane-based composition is a coating floor, and the use of which the effect of the present invention is most exerted.

本発明のポリウレタン系セメント組成物は、高光沢で耐汚染性が高いものとなる。   The polyurethane cement composition of the present invention has high gloss and high stain resistance.

一般にポリウレタン系セメント組成物は、通常3〜10mmの厚みで塗り広げるが、塗布してから硬化する間に樹脂成分が僅かに表面に浮き上がり、樹脂皮膜を形成すると考えられている。この樹脂皮膜は、光沢の低い被膜である場合が多く、微細な凹凸を持っている。この微細な凹凸が生じてしまうのは、浮き上がった樹脂分の中にセメント等の水硬性成分が微量に分散しているためと考えられ、この微細な凹凸が煤塵、土砂、タイヤ痕等の汚染物質を付着し易くし、また、除去を困難にしている原因となっている。   In general, the polyurethane-based cement composition is usually spread with a thickness of 3 to 10 mm. However, it is considered that the resin component slightly floats on the surface during application and curing to form a resin film. This resin film is often a low gloss film and has fine irregularities. This fine unevenness is caused by the fact that hydraulic components such as cement are dispersed in a minute amount in the floating resin, and this fine unevenness is contaminated with dust, earth and sand, tire marks, etc. This makes it easy to attach a substance and makes removal difficult.

本発明はポリウレタン系セメント組成物が、尿素を含むことにより、光沢が上がり、耐汚染性が向上することを特徴とし、その作用は次の様に推定される。
塗布してから硬化する間に形成される樹脂皮膜は主にポリオールとイソシアネートさらに配合により疎水性希釈剤からなっている。一方、水硬性成分は水とセメント等の無機成分から構成される。組成物に尿素が含まれることにより、水硬性成分が樹脂皮膜中に取り込まれた際イソシアネート基がビウレット化により架橋し、疎水性を高め、水硬性成分の取り込みを抑制する。
一方、尿素は親水性が高いため、水溶性ポリオールのように樹脂皮膜中に積極的に水硬性成分を介入させるような弊害がない。また、他の水溶性アミンのように急激にイソシアネートと反応することもないので充分な可使時間を確保できる。
このため、樹脂皮膜の形成が強固なものとなり、光沢が高く塗装ムラの出にくい組成物になると考えられる。
この作用・効果は組成物のゲル化速度や疎水性相互作用に影響を受けると考えられ、使用される環境等、特に温度によって効果は変わり、構成される材料は適宜選択する。
上記作用・効果により、ポリウレタン系セメント組成物が求められる過酷な条件下で使用、特に車両等が通行する部位において、通常のメンテナンスで容易に汚れを除去できる。
The present invention is characterized in that when the polyurethane-based cement composition contains urea, the gloss is improved and the stain resistance is improved, and its action is estimated as follows.
The resin film formed during application and curing is mainly composed of a polyol, an isocyanate and a hydrophobic diluent by blending. On the other hand, the hydraulic component is composed of water and inorganic components such as cement. When urea is contained in the composition, when the hydraulic component is incorporated into the resin film, the isocyanate group is cross-linked by biuretization, thereby increasing the hydrophobicity and suppressing the incorporation of the hydraulic component.
On the other hand, since urea has high hydrophilicity, there is no harmful effect of actively interposing a hydraulic component in a resin film like a water-soluble polyol. In addition, unlike other water-soluble amines, it does not react with isocyanate rapidly, so that a sufficient pot life can be secured.
For this reason, it is thought that the formation of the resin film becomes strong and the composition has high gloss and is difficult to cause uneven coating.
This action / effect is considered to be influenced by the gelation rate and hydrophobic interaction of the composition, and the effect varies depending on the environment used, particularly the temperature, and the material to be constructed is appropriately selected.
Due to the above-mentioned actions and effects, dirt can be easily removed by normal maintenance in a part where a polyurethane-based cement composition is used under severe conditions, particularly where a vehicle or the like passes.

ポリオール組成物
本発明のポリオール組成物は、ポリエステルポリオール、ポリエーテルポリオール、アクリルポリオール、エポキシ変性ポリオール等の二基以上の水酸基を持つポリオールを使用することができる。中でも疎水性のものが好ましく、例として、ひまし油変性ポリオールがあげられる。
具体的な製品として、住友バイエルウレタン(株)ディスモフェン1145、ディスモフェン1150などがある。
ポリオール組成物中にはポリオールを水に分散させる、或いはポリオールに水を分散させる形態で水を含むことが出来、ポリオールの種類によっては単独でその中に水を分散させることが可能なものもあるが、場合によってポリオールエマルジョンの安定性のため、ノニオン系界面活性剤を乳化剤として含むことができる。
またポリオール組成物中には、塗装作業性確保のためや、発泡によるフクレの制御のために希釈剤、仕上り向上のために消泡剤、レベリング剤等の添加剤を配合できる。
ポリオール組成物中の水の比率は40〜10重量%の範囲であることが望ましい。水分が40重量%を超えると硬化物の強度低下や微細クラック、光沢低下などを誘発し、10重量%を下回ると組み合わせて使用するセメント成分の分散が不十分となりやすく望ましくない。
ポリオール組成物が水を含有する形態の場合、この水分に尿素を溶解させておくことができ、このことにより施工時の配合量や分散度合いのブレを抑制することができる。
Polyol Composition The polyol composition of the present invention can use a polyol having two or more hydroxyl groups such as polyester polyol, polyether polyol, acrylic polyol, and epoxy-modified polyol. Of these, hydrophobic ones are preferable, and an example is castor oil-modified polyol.
Specific products include Sumitomo Bayer Urethane Co., Ltd. Dismophen 1145, Dismophen 1150, and the like.
Some polyol compositions can contain water in a form in which the polyol is dispersed in water or water is dispersed in the polyol, and depending on the type of the polyol, there are also those in which water can be dispersed alone. However, in some cases, a nonionic surfactant may be included as an emulsifier due to the stability of the polyol emulsion.
In the polyol composition, additives such as a diluent and an antifoaming agent and a leveling agent can be blended for ensuring coating workability and controlling blistering due to foaming, and improving finishing.
The ratio of water in the polyol composition is desirably in the range of 40 to 10% by weight. If the water content exceeds 40% by weight, strength reduction, fine cracks, and gloss reduction of the cured product are induced, and if the water content is less than 10% by weight, dispersion of the cement components used in combination tends to be insufficient.
When the polyol composition is in a form containing water, urea can be dissolved in this water, and this can suppress fluctuations in the amount and degree of dispersion during construction.

イソシアネート化合物
イソシアネート化合物としては、トリレンジイソシアネート(TDI)、ジフェニルメタンジイソシアネート(MDI)、ヘキサメチレンジイソシアネート(HDI)、水添化ジフェニルメタンジイソシアネート、水添化トリレンジイソシアネート、キシリレンジイソシアネート、イソホロンジイソシアネート等が使用できるが、好ましい例としては多核ポリフェニレンポリメチルポリイソシアネート、(以下ポリメリックMDIと略す)を含有するものがあげられる。
また、ポリメリックMDIを含有するイソシアネートはMDIモノマーを含む場合がほとんどであり、それには2、4’−ジフェニルメタンジイソシアネート(以下2、4’−MDIと略す)と4、4’−ジフェニルメタンジイソシアネート(以下4、4’−MDIと略す)の構造異性体が存在する。2、4’−MDIは光沢を下げる効果があるのでイソシアネート化合物中で5%未満であることが望ましい。
具体的な製品として、ポリメリックMDIを含有するものとして、スミジュール44V10、スミジュール44V20(以上 住友バイエルウレタン(株)、商品名)やコロネート3520、MR−100(以上 日本ポリウレタン(株)、商品名)などがあり、2、4’−MDIを含有するものとしては、BASFINOAC(株):ルプラネートMIがあげられる。
Isocyanate compound As the isocyanate compound, tolylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), hexamethylene diisocyanate (HDI), hydrogenated diphenylmethane diisocyanate, hydrogenated tolylene diisocyanate, xylylene diisocyanate, isophorone diisocyanate, etc. can be used. However, preferred examples include polynuclear polyphenylene polymethyl polyisocyanate (hereinafter abbreviated as polymeric MDI).
Further, most of the isocyanates containing polymeric MDI contain an MDI monomer, which includes 2,4′-diphenylmethane diisocyanate (hereinafter abbreviated as 2,4′-MDI) and 4,4′-diphenylmethane diisocyanate (hereinafter 4). (Abbreviated as 4′-MDI). Since 2,4′-MDI has an effect of lowering gloss, it is preferably less than 5% in the isocyanate compound.
Specific products that contain polymeric MDI include Sumidur 44V10, Sumidur 44V20 (Sumitomo Bayer Urethane Co., Ltd., trade name), Coronate 3520, MR-100 (above Nippon Polyurethane Co., Ltd., trade name) ) And the like, and 2, 4′-MDI is contained in BASFINOAC Co., Ltd .: Lupranate MI.

水硬性セメント
水硬性セメントは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、白色ポルトランドセメントなどが単体若しくは混合して使用される。
なお、施工の色調を特定色に設定したい場合には白色ポルトランドセメントが使用されれば、淡色に仕上ることが可能になる。
セメント成分は光沢を下げる効果があるのでポリオールとイソシアネート化合物の合計を超えない範囲が望ましく、また組成物中の水分を下回らない範囲が望ましい。水硬セメントは硅砂等を含まない状態でも使用できるが、塗材の寸法安定性が向上し、また、施工上の塗布厚みを安定させるためあらかじめ硅砂、ガイシ粉末等を混合しておき、プレミックス骨材として使用することが好ましい。硅砂等の骨材の粒径・量は前記、寸法安定性、塗布厚みの安定、作業性等で適宜選択する。一般に水硬セメントに対して0〜1200重量%、ポリオールとイソシアネート化合物の合計重量に対して0〜600重量%の範囲で使用できる。
Hydraulic cement As the hydraulic cement, Portland cement, alumina cement, blast furnace cement, early-strength Portland cement, white Portland cement and the like are used alone or in combination.
In addition, when it is desired to set the color of construction to a specific color, if white Portland cement is used, it is possible to finish it in a light color.
Since the cement component has the effect of lowering the gloss, a range that does not exceed the sum of the polyol and the isocyanate compound is desirable, and a range that does not fall below the moisture in the composition is desirable. Hydrocement cement can be used even without containing cinnabar sand, etc., but the dimensional stability of the coating material is improved, and in order to stabilize the coating thickness in construction, premixed cinnabar sand, galvanized powder, etc. It is preferable to use it as an aggregate. The particle size / amount of aggregate such as cinnabar is appropriately selected depending on the dimensional stability, stability of coating thickness, workability, and the like. Generally, it can be used in the range of 0 to 1200% by weight based on the hydraulic cement and 0 to 600% by weight based on the total weight of the polyol and isocyanate compound.

添加剤その他
各組成物中には、希釈剤や消泡剤、流動化剤、界面活性剤等の添加剤や、着色剤さらに硅砂、消石灰、ガイシ粉末などの骨材を必要に応じて含むことができる。水や尿素は施工時に後添加することもできるが、あらかじめ水溶液にておくことが望ましい。
Additives, etc. In each composition, additives such as diluents, antifoaming agents, fluidizing agents, surfactants, etc., colorants, and aggregates such as dredged sand, slaked lime, and insulators are included as necessary. Can do. Although water and urea can be added later at the time of construction, it is preferable to preliminarily use an aqueous solution.

以下、本発明について実施例、比較例により詳細に説明する。表1に結果を記す。   Hereinafter, the present invention will be described in detail with reference to examples and comparative examples. Table 1 shows the results.

実施例・比較例構成原料
ディスモフェン1150 商品名、住友バイエルウレタン(株)、ひまし油変性ポリオール、水酸基価:165mgKOH/g
ハイゾールSAS296 商品名、新日本石油(株)、高沸点芳香族系炭化水素化合物 希釈剤
BYK−057 商品名、ビックケミー(株)、ポリマー型消泡剤
エマルゲン1118S−70 商品名、花王(株)、 ノニオン系界面活性剤、ポリオキシエチレンアルキルエーテル、HLB:16.4
尿素 和光純薬工業(株)、JIS試薬特級
ミリオネートMR−100 商品名、日本ポリウレタン工業(株)、ポリメリックMDI、NCO含有量31%、2、4’−MDI含有量1%以下
Examples / Comparative Examples Constituents Dismophen 1150 Trade name, Sumitomo Bayer Urethane Co., Ltd., castor oil-modified polyol, hydroxyl value: 165 mgKOH / g
Hysol SAS296 trade name, Nippon Oil Co., Ltd., high boiling aromatic hydrocarbon compound diluent BYK-057 trade name, Big Chemie Co., Ltd., polymer type antifoaming agent Emulgen 1118S-70 trade name, Kao Corporation Nonionic surfactant, polyoxyethylene alkyl ether, HLB: 16.4
Urea Wako Pure Chemical Industries, Ltd., JIS reagent special grade Millionate MR-100 Product name, Nippon Polyurethane Industry Co., Ltd., Polymeric MDI, NCO content 31%, 2, 4'-MDI content 1% or less

ディスモフェン1150を35重量部、ハイゾールSAS296を33.5重量部、BYK−057を1重量部、エマルゲン1118S−70を1重量部加え、これに水道水を29重量部に尿素を0.5重量部加えて溶解させた水溶液をディスパー型撹拌機で撹拌しながら投入し、2分間撹拌してエマルジョンを得、これを実施例1のポリオールエマルジョンとした。   35 parts by weight of Dismophen 1150, 33.5 parts by weight of Hysol SAS296, 1 part by weight of BYK-057, 1 part by weight of Emulgen 1118S-70, 29 parts by weight of tap water and 0.5 parts by weight of urea The aqueous solution added and dissolved was added while stirring with a disper type stirrer, and stirred for 2 minutes to obtain an emulsion, which was designated as the polyol emulsion of Example 1.

実施例1の尿素を1.0重量部と変えた以外実施例1と同じく行い実施例2のポリオールエマルジョンとした。   A polyol emulsion of Example 2 was obtained in the same manner as in Example 1 except that the urea in Example 1 was changed to 1.0 part by weight.

実施例1の尿素を2.0重量部と変えた以外実施例1と同じく行い実施例3のポリオールエマルジョンとした。   A polyol emulsion of Example 3 was obtained in the same manner as in Example 1 except that the urea in Example 1 was changed to 2.0 parts by weight.

実施例1の尿素を5.0重量部と変えた以外実施例1と同じく行い実施例4のポリオールエマルジョンとした。   A polyol emulsion of Example 4 was obtained in the same manner as in Example 1 except that the urea in Example 1 was changed to 5.0 parts by weight.

比較例1
実施例1の尿素を無添加とした以外実施例1と同じく行い比較例1のポリオールエマルジョンとした。
Comparative Example 1
A polyol emulsion of Comparative Example 1 was prepared in the same manner as in Example 1 except that urea of Example 1 was not added.

Figure 0005389399
Figure 0005389399

試験体
実施例・比較例のポリオールエマルジョンとイソシアネート化合物としてミリオネートMR−100を、さらに白色ポルトランドセメント100重量部に硅砂6号と硅砂5号をそれぞれ150部ずつ加えて混合した水硬性セメント混合物をそれぞれ23℃の雰囲気下に一晩放置した後、ポリオールエマルジョン:ミリオネートMR−100:水硬性セメント混合物を重量比で1:1:4に混合、ディスパー型撹拌機にて2分間撹拌したものをJIS A5430に適合する300×300mmスレート平板に、厚さ4.0mmになるように金コテにて塗布し、23℃の雰囲気下でそれぞれ7日間静置したものを試験体とした。
A hydraulic cement mixture prepared by adding Millionate MR-100 as a polyol emulsion and an isocyanate compound of test body examples / comparative examples and further adding 150 parts of cinnabar sand No. 6 and cinnabar sand No. 5 to 100 parts by weight of white Portland cement, respectively. JIS A5430 is a mixture of a polyol emulsion: Millionate MR-100: hydraulic cement mixture mixed at a weight ratio of 1: 1: 4 and stirred for 2 minutes with a disperser-type stirrer after being allowed to stand overnight at 23 ° C. A test piece was applied to a 300 × 300 mm slate plate conforming to No. 1 with a gold iron so as to have a thickness of 4.0 mm, and allowed to stand in an atmosphere of 23 ° C. for 7 days.

60度光沢度
実施例・比較例の各試験体を、JIS K5600−4−7の試験法に則り、光沢度計(日本電色工業(株)製:PG−1)を用いて60度鏡面光沢度を測定した。
60 degree glossiness Each test body of Examples and Comparative Examples is mirrored at 60 degrees using a gloss meter (Nippon Denshoku Industries Co., Ltd .: PG-1) according to the test method of JIS K5600-4-7. Gloss was measured.

汚染試験
ΔE abの数値を求めて、非汚染部(下記保護部)と色差が少ない。ΔE abが小さいものが耐汚染性が良好であることを示す。
60度鏡面光沢度測定で用いた試験体の半面をセロハンテープでマスキングした後、汚染物質を乾燥ウエスで塗りつけた。これを、中性洗剤を用いて水洗いし、乾燥させ、マスキングを除去し、保護した部分と汚染された部分の色差を色彩色差計(ミノルタ(株)製:CR−400)にて測定した。
汚染物質はJIS Z8901に規定される3種の硅砂を50重量部、8種の関東ロームを25重量部、12種のカーボンブラックを25重量部配合したものを用いた。
色差測定は、JIS Z8730に規定される方法に準拠し行い、L表色系による色差ΔE abを測定した。
Contamination test The numerical value of ΔE * ab is obtained, and there is little color difference from the non-contaminated part (protection part below). A small ΔE * ab indicates good contamination resistance.
After masking the half surface of the test body used in the 60-degree specular gloss measurement with a cellophane tape, the contaminant was applied with a dry waste cloth. This was washed with water using a neutral detergent, dried, masked, and the color difference between the protected part and the contaminated part was measured with a color difference meter (manufactured by Minolta Co., Ltd .: CR-400).
As the pollutant, 50 parts by weight of 3 kinds of cinnabar sand specified in JIS Z8901, 25 parts by weight of 8 kinds of Kanto loam, and 25 parts by weight of 12 kinds of carbon black were used.
The color difference measurement was performed in accordance with the method defined in JIS Z8730, and the color difference ΔE * ab based on the L * a * b * color system was measured.

Claims (2)

水硬性セメント、水、ポリオール、イソシアネート化合物を含むポリウレタン系セメント組成物であって、水とポリオールからポリオール組成物の水比率が40〜10重量%であるエマルジョンが形成され、尿素が含まれることを特徴とするポリウレタン系セメント組成物。 A polyurethane-based cement composition containing hydraulic cement, water, polyol, and an isocyanate compound, wherein an emulsion in which the water ratio of the polyol composition is 40 to 10% by weight is formed from water and the polyol, and urea is contained. A polyurethane-based cement composition. 上記ポリウレタン系組成物の使途が塗床であること特徴とする請求項1に記載のポリウレタン系セメント組成物。   The polyurethane-based cement composition according to claim 1, wherein the polyurethane-based composition is used for coating.
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