JP2023041093A - Hydraulic epoxy resin mortar composition for floor finishing and construction method thereof - Google Patents
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- 239000003822 epoxy resin Substances 0.000 title claims abstract description 152
- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 152
- 239000000203 mixture Substances 0.000 title claims abstract description 80
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 33
- 238000010276 construction Methods 0.000 title abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 54
- 239000011396 hydraulic cement Substances 0.000 claims abstract description 26
- 229920005989 resin Polymers 0.000 claims abstract description 25
- 239000011347 resin Substances 0.000 claims abstract description 25
- 239000004567 concrete Substances 0.000 claims abstract description 24
- 239000007787 solid Substances 0.000 claims abstract description 20
- 239000004568 cement Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 7
- 230000001804 emulsifying effect Effects 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 38
- 239000011248 coating agent Substances 0.000 description 32
- 238000000576 coating method Methods 0.000 description 32
- 239000000463 material Substances 0.000 description 20
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- 239000000377 silicon dioxide Substances 0.000 description 13
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- 230000000052 comparative effect Effects 0.000 description 10
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- 239000002245 particle Substances 0.000 description 8
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- 239000004615 ingredient Substances 0.000 description 2
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- BYLSIPUARIZAHZ-UHFFFAOYSA-N 2,4,6-tris(1-phenylethyl)phenol Chemical compound C=1C(C(C)C=2C=CC=CC=2)=C(O)C(C(C)C=2C=CC=CC=2)=CC=1C(C)C1=CC=CC=C1 BYLSIPUARIZAHZ-UHFFFAOYSA-N 0.000 description 1
- AHDSRXYHVZECER-UHFFFAOYSA-N 2,4,6-tris[(dimethylamino)methyl]phenol Chemical compound CN(C)CC1=CC(CN(C)C)=C(O)C(CN(C)C)=C1 AHDSRXYHVZECER-UHFFFAOYSA-N 0.000 description 1
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 1
- ANOPCGQVRXJHHD-UHFFFAOYSA-N 3-[3-(3-aminopropyl)-2,4,8,10-tetraoxaspiro[5.5]undecan-9-yl]propan-1-amine Chemical compound C1OC(CCCN)OCC21COC(CCCN)OC2 ANOPCGQVRXJHHD-UHFFFAOYSA-N 0.000 description 1
- DZIHTWJGPDVSGE-UHFFFAOYSA-N 4-[(4-aminocyclohexyl)methyl]cyclohexan-1-amine Chemical compound C1CC(N)CCC1CC1CCC(N)CC1 DZIHTWJGPDVSGE-UHFFFAOYSA-N 0.000 description 1
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
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- 229920001730 Moisture cure polyurethane Polymers 0.000 description 1
- NLNWWWDKCLQVNS-UHFFFAOYSA-N N-hexyl-6-iminohexan-1-amine Chemical compound N=CCCCCCNCCCCCC NLNWWWDKCLQVNS-UHFFFAOYSA-N 0.000 description 1
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- GKXVJHDEWHKBFH-UHFFFAOYSA-N [2-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC=C1CN GKXVJHDEWHKBFH-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000008360 acrylonitriles Chemical class 0.000 description 1
- 150000001334 alicyclic compounds Chemical class 0.000 description 1
- 150000007824 aliphatic compounds Chemical class 0.000 description 1
- 150000008055 alkyl aryl sulfonates Chemical class 0.000 description 1
- 150000005215 alkyl ethers Chemical class 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- IMUDHTPIFIBORV-UHFFFAOYSA-N aminoethylpiperazine Chemical compound NCCN1CCNCC1 IMUDHTPIFIBORV-UHFFFAOYSA-N 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 238000009411 base construction Methods 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
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- 230000009849 deactivation Effects 0.000 description 1
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- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical class C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000005002 finish coating Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- QOHMWDJIBGVPIF-UHFFFAOYSA-N n',n'-diethylpropane-1,3-diamine Chemical compound CCN(CC)CCCN QOHMWDJIBGVPIF-UHFFFAOYSA-N 0.000 description 1
- LSHROXHEILXKHM-UHFFFAOYSA-N n'-[2-[2-[2-(2-aminoethylamino)ethylamino]ethylamino]ethyl]ethane-1,2-diamine Chemical compound NCCNCCNCCNCCNCCN LSHROXHEILXKHM-UHFFFAOYSA-N 0.000 description 1
- ZETYUTMSJWMKNQ-UHFFFAOYSA-N n,n',n'-trimethylhexane-1,6-diamine Chemical compound CNCCCCCCN(C)C ZETYUTMSJWMKNQ-UHFFFAOYSA-N 0.000 description 1
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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- 230000001953 sensory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Floor Finish (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
本発明は、下地コンクリート表面に塗付して塗り床とする床仕上げ用水硬性エポキシ樹脂モルタル組成物及びその施工方法に関する。 TECHNICAL FIELD The present invention relates to a hydraulic epoxy resin mortar composition for floor finishing, which is applied to a base concrete surface to form a floor coating, and a method for applying the same.
従来、下地コンクリート表面に塗布する塗材組成物及びその床施工方法並びにそれによる床構造が提案されている(特許文献1)。該塗材組成物は、水硬性セメントと骨材と水系エポキシ樹脂を含む水系エポキシ樹脂モルタル組成物であって、水硬性セメントと水の重量比が0.3以上0.4以下、エポキシ樹脂に該エポキシ樹脂と反応する硬化剤を加えたものを樹脂とした場合の該樹脂の樹脂固形分重量が、水を含んだ全配合物の重量に対して4%以上10%以下、硬化物の総細孔量が0.05cc/g以上0.2cc以下、T.I値が1.0~1.5であることを特徴とする塗材組成物である。 Conventionally, a coating material composition to be applied to a base concrete surface, a floor construction method using the same, and a floor structure using the same have been proposed (Patent Document 1). The coating material composition is a water-based epoxy resin mortar composition containing hydraulic cement, aggregate, and water-based epoxy resin, wherein the weight ratio of hydraulic cement to water is 0.3 or more and 0.4 or less, and the epoxy resin When the resin is made by adding a curing agent that reacts with the epoxy resin, the resin solid content weight of the resin is 4% or more and 10% or less based on the weight of the entire compound containing water, and the total weight of the cured product The pore volume is 0.05 cc/g or more and 0.2 cc or less; The coating material composition is characterized by having an I value of 1.0 to 1.5.
該塗材組成物は、下地コンクリートに塗付して硬化させたのち、その上に無溶剤系、溶剤系、若しくは水系エポキシ樹脂又は無溶剤系、溶剤系、若しくは水系ウレタン樹脂の仕上げ塗材を重層するもので、塗材組成物の塗付だけでそのまま仕上げ、とすることが出来ない、という課題がある。 After the coating material composition is applied to the base concrete and cured, a finish coating material of solvent-free, solvent-based, or water-based epoxy resin or solvent-free, solvent-based, or water-based urethane resin is applied thereon. Since it is multi-layered, there is a problem that it cannot be finished by simply applying the coating material composition.
また、仕上げ塗材の膨れ面積率が0.5%以下となる塗材組成物であって、仕上げ塗材との付着性に優れ、下地コンクリートからの水分の透過を防止する塗材組成物として、水硬性セメントと骨材と水系エポキシ樹脂を含む水系エポキシ樹脂モルタル組成物であって、水硬性セメントと水の重量比が0.33以上0.37以下、エポキシ樹脂に該エポキシ樹脂と反応する硬化剤を加えたものを樹脂とした場合の該樹脂の樹脂固形分重量が、水を含んだ全配合物の重量に対して8%以上9%以下であり、硬化物の総細孔量が0.10cc/g以上0.15cc/g以下、T.I値が1.1以上1.3以下であり、水系エポキシ樹脂は、非乳化型のエポキシ樹脂と自己乳化型の硬化剤とから成り、塗材組成物の混合直後における粘度が2Pa・s以上3Pa・s以下/23℃であり、水硬性セメントが白セメントであり、下地コンクリートに0.8~1.2mm厚みに塗付して硬化させることを特徴とする塗材組成物が提案されている(特許文献2)。 In addition, a coating material composition in which the swollen area ratio of the finishing coating material is 0.5% or less, is excellent in adhesion to the finishing coating material, and prevents water from permeating from the underlying concrete. A water-based epoxy resin mortar composition containing hydraulic cement, aggregate, and water-based epoxy resin, wherein the weight ratio of hydraulic cement to water is 0.33 or more and 0.37 or less, and the epoxy resin reacts with the epoxy resin. When the resin is made by adding a curing agent, the resin solid content weight of the resin is 8% or more and 9% or less with respect to the weight of the entire compound containing water, and the total pore volume of the cured product is 0.10 cc/g or more and 0.15 cc/g or less, T.I. The I value is 1.1 or more and 1.3 or less, the water-based epoxy resin is composed of a non-emulsifying epoxy resin and a self-emulsifying curing agent, and the viscosity of the coating material composition immediately after mixing is 2 Pa s or more. A coating material composition has been proposed, which has a temperature of 3 Pa·s or less/23° C., white cement as a hydraulic cement, and is applied to a base concrete to a thickness of 0.8 to 1.2 mm and cured. (Patent Document 2).
該塗材組成物は、特許文献1の塗材組成物と同様に、下地コンクリートに塗付して硬化させたのち、その上に無溶剤系、溶剤系、若しくは水系エポキシ樹脂又は無溶剤系、溶剤系、若しくは水系ウレタン樹脂の仕上げ塗材を重層するもので、塗材組成物の塗付だけでそのまま仕上げ、とすることが出来ない、という課題がある。 The coating material composition, like the coating material composition of Patent Document 1, is applied to the base concrete and cured, and then solvent-free, solvent-based, or water-based epoxy resin or solvent-free, There is a problem that it is not possible to simply apply the coating material composition and finish it as it is, since the finishing coating material of solvent-based or water-based urethane resin is overlaid.
また、これらの課題を解決するために、水硬性セメントと骨材とエポキシ樹脂と水系エポキシ樹脂硬化剤を含む床仕上げ用水硬性エポキシ樹脂モルタル組成物であって、水硬性セメントと水の重量比が0.3~0.4であり、エポキシ樹脂に該エポキシ樹脂と反応する水系エポキシ樹脂硬化剤を加えたものを樹脂とした場合の樹脂固形分重量が水を含んだ全組成物の重量に対して8~9%であり 、骨材の組成物単位重量当たりの比表面積は29~34cm2/gであり、骨材は6号けい砂及び7号けい砂を含むことを特徴とする床仕上げ用水硬性エポキシ樹脂モルタル組成物が提案されている(特許文献3)。 In order to solve these problems, a hydraulic epoxy resin mortar composition for floor finishing comprising hydraulic cement, aggregate, epoxy resin and a water-based epoxy resin curing agent, wherein the weight ratio of hydraulic cement to water is 0.3 to 0.4, and the weight of the resin solid content when the resin is made by adding a water-based epoxy resin curing agent that reacts with the epoxy resin to the weight of the entire composition containing water is 8 to 9%, the aggregate has a specific surface area per unit weight of the composition of 29 to 34 cm 2 /g, and the aggregate contains No. 6 silica sand and No. 7 silica sand. A hydraulic epoxy resin mortar composition has been proposed (Patent Document 3).
しかしながら、特許文献3に記載の床仕上げ用水硬性エポキシ樹脂モルタル組成物は、平均粒子径が350μm前後の6号けい砂を含むため、下地コンクリートに不陸が有る場合や、局所的に凸部が存在する場合には、該6号けい砂が塗膜表面に凹凸状に表れて仕上がりが不良となる場合があるという課題があり、また、耐衝撃性が十分ではないという課題がある。 However, since the hydraulic epoxy resin mortar composition for floor finishing described in Patent Document 3 contains No. 6 silica sand having an average particle size of about 350 μm, it is possible to prevent unevenness in the base concrete or local protrusions. If present, there is a problem that the No. 6 silica sand may appear uneven on the surface of the coating film, resulting in a poor finish.
本発明が解決しようとする課題は、下地コンクリートに不陸が有る場合や、局所的に凸部が存在する場合であっても、良好な仕上がりとなり、また耐衝撃性に優れる床仕上げ用水硬性エポキシ樹脂モルタル組成物及びその施工方法を提供することにある。 The problem to be solved by the present invention is to provide a hydraulic epoxy for floor finishing that provides a good finish and has excellent impact resistance even if the underlying concrete has unevenness or local protrusions. An object of the present invention is to provide a resin mortar composition and its application method.
上記課題を解決するため請求項1記載の発明は、水硬性セメントと骨材とエポキシ樹脂と水系エポキシ樹脂硬化剤と非水系エポキシ樹脂硬化剤とを含む床仕上げ用水硬性エポキシ樹脂モルタル組成物であって、エポキシ樹脂はウレタン変性エポキシ樹脂を含み、水硬性セメントに対する水の重量比が0.1~0.3であり、エポキシ樹脂に該エポキシ樹脂と反応する水系エポキシ樹脂硬化剤と非水系エポキシ樹脂硬化剤を加えたものを樹脂とした場合の樹脂固形分重量が水を含んだ全組成物の重量に対して35~55%であり、骨材は組成物全体100重量部に対して20~50重量部であることを特徴とする床仕上げ用水硬性エポキシ樹脂モルタル組成物を提供する。 In order to solve the above-mentioned problems, the invention according to claim 1 is a hydraulic epoxy resin mortar composition for floor finishing comprising hydraulic cement, aggregate, epoxy resin, water-based epoxy resin curing agent and non-aqueous epoxy resin curing agent. The epoxy resin contains a urethane-modified epoxy resin, and the weight ratio of water to hydraulic cement is 0.1 to 0.3. The resin solid content weight when the resin is made by adding a curing agent is 35 to 55% with respect to the weight of the entire composition containing water, and the aggregate is 20 to 20 parts per 100 parts by weight of the entire composition. Provided is a hydraulic epoxy resin mortar composition for floor finishing characterized by 50 parts by weight.
また請求項2記載の発明は、前記エポキシ樹脂は非乳化型のエポキシ樹脂であり、前記水系エポキシ樹脂硬化剤は自己乳化型のエポキシ樹脂硬化剤であり、前記非水系エポキシ樹脂硬化剤は非自己乳化型のエポキシ樹脂硬化剤であることを特徴とする請求項1記載の床仕上げ用水硬性エポキシ樹脂モルタル組成物を提供する。 In the invention according to claim 2, the epoxy resin is a non-emulsifying epoxy resin, the aqueous epoxy resin curing agent is a self-emulsifying epoxy resin curing agent, and the non-aqueous epoxy resin curing agent is a non-self-emulsifying epoxy resin. A hydraulic epoxy resin mortar composition for floor finishing according to claim 1, characterized in that it is an emulsifying type epoxy resin curing agent.
また請求項3記載の発明は、請求項1又は請求項2記載の床仕上げ用水硬性エポキシ樹脂モルタル組成物を下地コンクリート表面に2~4kg/m2塗付することを特徴とする床仕上げ用水硬性エポキシ樹脂モルタル組成物の施工方法を提供する。 Further, according to the invention of claim 3, the hydraulic epoxy resin mortar composition for floor finishing according to claim 1 or claim 2 is applied to the surface of the underlying concrete in an amount of 2 to 4 kg/m 2 . A method of applying an epoxy resin mortar composition is provided.
本発明の床仕上げ用水硬性エポキシ樹脂モルタル組成物は、骨材が平均粒子径150μm前後の7号けい砂から成るため、下地コンクリートに不陸が有る場合や局所的に凸部が存在する場合であっても、塗膜表面は平滑状態となり良好な仕上がりとなる効果がある。 In the hydraulic epoxy resin mortar composition for floor finishing of the present invention, since the aggregate consists of No. 7 silica sand having an average particle size of about 150 μm, even if the base concrete has unevenness or local protrusions, Even if there is, there is an effect that the surface of the coating film becomes a smooth state and a good finish is obtained.
また、本発明の床仕上げ用水硬性エポキシ樹脂モルタル組成物は、エポキシ樹脂に該エポキシ樹脂と反応する水系エポキシ樹脂硬化剤と非水系エポキシ樹脂硬化剤を加えたものを樹脂とした場合の樹脂固形分重量が水を含んだ全組成物の重量に対して35~55%と高いことによって、樹脂の化学反応による硬化によって組成物の物理的強度を発現させる効果があり、これと並行して水硬性セメントの水和によっても組成物の物理的強度を補強する効果があり、双方の硬化メカニズムにより下地コンクリートに対して高い接着性を有するという効果がある。 Further, the hydraulic epoxy resin mortar composition for floor finishing of the present invention is obtained by adding an aqueous epoxy resin curing agent that reacts with the epoxy resin and a non-aqueous epoxy resin curing agent to the epoxy resin, and the solid content of the resin is Since the weight is as high as 35 to 55% with respect to the weight of the entire composition containing water, it has the effect of expressing the physical strength of the composition by curing due to the chemical reaction of the resin, and in parallel with this, the hydraulic property Hydration of cement also has the effect of reinforcing the physical strength of the composition, and both hardening mechanisms have the effect of having high adhesiveness to underlying concrete.
また、上記の理由と併せて本発明の床仕上げ用水硬性エポキシ樹脂モルタル組成物には、エポキシ樹脂にウレタン変性エポキシ樹脂を含むため、硬化樹脂は可撓性を有し、例えば組成物が硬化することで形成された塗膜に1kgの鋼球を1mの高さから落下させるという工学的な意味での耐衝撃性に優れる、という効果がある。 In addition to the above reasons, the hydraulic epoxy resin mortar composition for floor finishing of the present invention contains a urethane-modified epoxy resin in the epoxy resin, so that the cured resin has flexibility, for example, the composition can be cured. There is an effect of being excellent in impact resistance in the engineering sense that a steel ball of 1 kg is dropped from a height of 1 m on the coating film formed by this.
また、本発明の床仕上げ用水硬性エポキシ樹脂モルタル組成物は、上記の高い接着性により、従来の水硬性セメントを含まない厚膜型エポキシ樹脂系塗り床材のように、溶剤型や水系のプライマーを予め下地コンクリートに塗付する必要がないという効果がある。またこれにより、下地コンクリート表面に塗り床を形成する工程数は、基本的に本発明の床仕上げ用水硬性エポキシ樹脂モルタル組成物を塗付する1工程であり、従来と比較して手間が少なく低コストであるという効果がある。 In addition, the hydraulic epoxy resin mortar composition for floor finishing of the present invention, due to the above-mentioned high adhesiveness, can be used as a solvent-type or water-based primer like a conventional thick-film epoxy resin-based floor coating material that does not contain hydraulic cement. There is an effect that it is not necessary to apply to the underlying concrete in advance. In addition, as a result, the number of steps for forming a coating floor on the surface of the base concrete is basically one step for applying the hydraulic epoxy resin mortar composition for floor finishing of the present invention, which is less labor and less costly than conventional. There is an effect that it is a cost.
また、請求項3記載の床仕上げ用水硬性エポキシ樹脂モルタル組成物の施工方法で塗付された塗り床は、同様に下地コンクリートに不陸が有る場合や、局所的に凸部が存在する場合であっても、塗膜表面は平滑状態となり良好な仕上がりとなる効果があり、上記のように高い接着性と耐衝撃性を有し、また1工程で下地コンクリート表面に塗り床を形成することが出来るため、短工程、低コストに床コンクリートを仕上げることが出来る効果がある。 In addition, the floor coating applied by the method of applying the hydraulic epoxy resin mortar composition for floor finishing according to claim 3 may similarly have irregularities in the base concrete or may have local protrusions. Even if there is, the surface of the coating film becomes smooth and has the effect of providing a good finish, and as described above, it has high adhesion and impact resistance, and it is possible to form a coating floor on the surface of the base concrete in one process. Since it can be done, there is an effect that the floor concrete can be finished in a short process and at a low cost.
本発明の床仕上げ用水硬性エポキシ樹脂モルタル組成物は、水硬性セメントと骨材とエポキシ樹脂と水系エポキシ樹脂硬化剤と非水系エポキシ樹脂硬化剤とを含む床仕上げ用水硬性エポキシ樹脂モルタル組成物であって、エポキシ樹脂はウレタン変性エポキシ樹脂を含み、水硬性セメントに対する水の重量比が0.1~0.3であり、エポキシ樹脂に該エポキシ樹脂と反応する水系エポキシ樹脂硬化剤と非水系エポキシ樹脂硬化剤を加えたものを樹脂とした場合の樹脂固形分重量が水を含んだ全組成物の重量に対して35~55%であり、骨材は組成物全体100重量部に対して20~50重量部であることを特徴とする床仕上げ用水硬性エポキシ樹脂モルタル組成物であり、下地コンクリートの表面に直接塗付して硬化することにより、下地コンクリート表面に塗り床層を形成すると共にそのまま仕上がり床となる。 The hydraulic epoxy resin mortar composition for floor finishing of the present invention is a hydraulic epoxy resin mortar composition for floor finishing containing a hydraulic cement, an aggregate, an epoxy resin, a water-based epoxy resin curing agent and a non-aqueous epoxy resin curing agent. The epoxy resin contains a urethane-modified epoxy resin, and the weight ratio of water to hydraulic cement is 0.1 to 0.3. The resin solid content weight when the resin is made by adding a curing agent is 35 to 55% with respect to the weight of the entire composition containing water, and the aggregate is 20 to 20 parts per 100 parts by weight of the entire composition. A hydraulic epoxy resin mortar composition for floor finishing, characterized by containing 50 parts by weight, which is directly applied to the surface of a base concrete and cured to form a coating floor layer on the surface of the base concrete and finish as it is. becomes the floor.
本発明に使用する水硬性セメントは、水硬性ポゾラン成分であり、水硬性を有する普通ポルトランドセメント、早強ポルトランドセメント、中庸熱ポルトランドセメント、耐硫酸塩ポルトランドセメント、白色ポルトランドセメント等の各種ポルトランドセメントや高炉セメント、シリカセメント、フライアッシュセメント等の混合セメントや、アルミン酸石灰質セメント、ケイ酸アルミン酸石灰質セメント、リン酸セメント等、水硬性ポゾランであるメタカオリン等を使用することが出来る。これらのうち特に白セメントすなわち白色ポルトランドセメントが、仕上げ材として所望の色彩を得やすく、また組成物の流動性を良好とし、結果として組成物の施工作業性が良好になることから、好ましい。 The hydraulic cement used in the present invention is a hydraulic pozzolan component, and various Portland cements such as ordinary Portland cement, high-early-strength Portland cement, moderate-heat Portland cement, sulfate-resistant Portland cement, white Portland cement, etc. Mixed cement such as blast furnace cement, silica cement and fly ash cement, aluminate lime cement, silicate aluminate lime cement, phosphate cement, etc., and metakaolin, which is a hydraulic pozzolan, can be used. Among these, white cement, that is, white Portland cement, is particularly preferred because it is easy to obtain a desired color as a finishing material, and the fluidity of the composition is good, resulting in good construction workability of the composition.
本発明に使用する骨材は、通常水硬性材料と混合して使用できるものであれば本発明の組成物に使用することが出来るが、セルフレベリング性と良好な表面仕上がり性の観点からJISG5901の7号けい砂であることが好ましく、前記水硬性セメントと水の重量比、及び全固形分重量に対する樹脂固形分重量にて配合成分と配合量が確定するので、実際には残る成分となる。骨材は粒径等が同等であれば、等しい効果がえられるものの、コスト、入手性からけい砂が最適となる。JISG5901の7号より細かいと粘度が高くなり、セルフレベリング性と鏝作業性が低下し、7号けい砂より大きいと表面仕上り性が劣る場合がある。市販品としてはJISG5901の7号けい砂に東北硅砂7号(共に北日本産業(株)、商品名、平均粒径(重量による積算値が50%である粒子の直径をいう):185μm)があり、本組成物に配合する骨材には7号けい砂を配合することが好ましい。 The aggregate used in the present invention can be used in the composition of the present invention as long as it can be used by mixing with a normal hydraulic material. Silica sand No. 7 is preferable, and since the weight ratio of the hydraulic cement to water and the weight of resin solids relative to the weight of all solids determine the ingredients and the amount to be added, it is actually the remaining ingredient. As long as the aggregate has the same particle size, the same effect can be obtained, but silica sand is the most suitable from the viewpoint of cost and availability. If it is finer than No. 7 of JIS G5901, the viscosity becomes high, and the self-leveling property and trowel workability are lowered. Commercially available JIS G5901 No. 7 silica sand and Tohoku silica sand No. 7 (both trade names, Kitanihon Sangyo Co., Ltd., trade name, average particle diameter (meaning the diameter of particles whose integrated value by weight is 50%): 185 μm). It is preferable to mix No. 7 silica sand as the aggregate to be mixed in the present composition.
本発明に使用するエポキシ樹脂は、液状であり、常温硬化するものであればよく、ビスフェノールA型エポキシ樹脂、ビスフェノールF型エポキシ樹脂、フェノールノボラック型エポキシ樹脂、ビスフェノールAD型エポキシ樹脂、ビフェニル型エポキシ樹脂、ナフタレン型エポキシ樹脂、脂環式エポキシ樹脂、グリシジルエステル型エポキシ樹脂、グリシジルアミン型エポキシ樹脂、複素環式エポキシ樹脂、ジアリールスルホン型エポキシ樹脂、ヒドロキノン型エポキシ樹脂およびそれらの変性物などを単独あるいは併せて用いてもよく、また、希釈剤を用いて液状化してもよい。また好ましくはエポキシ樹脂が水に乳化せず不溶なものが良く本願ではこれを非乳化型と称している。最も多く配合するエポキシ樹脂の軟化点は、35℃以下が好ましく、このような液状エポキシ樹脂としては、液状ビスフェノールA型エポキシ樹脂が、汎用性、コスト等で適当である。なおこれらのエポキシ樹脂組成物の市販品例としてジョリエースJEX210A(アイカ工業(株)製エポキシ樹脂、商品名、エポキシ当量180、固形分100%、粘度0.7Pa・s/25℃)が挙げられる。 Epoxy resins used in the present invention are liquid and can be cured at room temperature. , naphthalene-type epoxy resins, alicyclic epoxy resins, glycidyl ester-type epoxy resins, glycidylamine-type epoxy resins, heterocyclic epoxy resins, diarylsulfone-type epoxy resins, hydroquinone-type epoxy resins, modified products thereof, etc. alone or in combination. It may be used as a liquid, or may be liquefied using a diluent. In addition, it is preferable that the epoxy resin is not emulsified in water and is insoluble in water, and is called a non-emulsified type in the present application. The softening point of the epoxy resin to be blended most is preferably 35° C. or lower, and as such a liquid epoxy resin, a liquid bisphenol A type epoxy resin is suitable for versatility, cost and the like. Examples of commercially available epoxy resin compositions include Jolyace JEX210A (epoxy resin manufactured by Aica Kogyo Co., Ltd., trade name, epoxy equivalent: 180, solid content: 100%, viscosity: 0.7 Pa·s/25°C). .
本発明に使用するエポキシ樹脂には上記のものに加えて、ウレタン変性エポキシ樹脂を必須成分とする。該ウレタン変性エポキシ樹脂は、ポリアルキレングリコールの末端にポリイソシアネートを付加したポリウレタンプレポリマーにエポキシ樹脂の水酸基を反応して得られ樹脂(混合比は10:90~50:50)である。エポキシ当量は200~300であって、液状であることが好ましく、床仕上げ用水硬性エポキシ樹脂モルタル組成物として下地コンクリートに金鏝等で塗付できる作業性を確保するために、粘度は20000mP・s/25℃ 以下であることが好ましい。またエポキシ樹脂中のウレタン変性エポキシ樹脂の含有量は、10~90重量%が好ましく、20~80重量%がより好ましい。10重量%未満では硬化した組成物の耐衝撃性が不十分な場合があり、90重量%超では組成物の硬化速度が低下する等、硬化性が低下する場合がある。20重量%未満では硬化した組成物の耐衝撃性が不十分となる傾向があり、80重量%超では同様に硬化性が低下する傾向がある。 In addition to the above, the epoxy resin used in the present invention contains a urethane-modified epoxy resin as an essential component. The urethane-modified epoxy resin is a resin obtained by reacting a hydroxyl group of an epoxy resin with a polyurethane prepolymer in which polyisocyanate is added to the end of polyalkylene glycol (mixing ratio is 10:90 to 50:50). It has an epoxy equivalent of 200 to 300 and is preferably in a liquid form. In order to ensure workability that can be applied to the underlying concrete with a trowel or the like as a hydraulic epoxy resin mortar composition for floor finishing, the viscosity is 20000 mP s. /25°C or less. The content of the urethane-modified epoxy resin in the epoxy resin is preferably 10-90% by weight, more preferably 20-80% by weight. If it is less than 10% by weight, the impact resistance of the cured composition may be insufficient, and if it exceeds 90% by weight, the curing speed of the composition may decrease, and the curability may deteriorate. If it is less than 20% by weight, the impact resistance of the cured composition tends to be insufficient, and if it exceeds 80% by weight, curability tends to decrease.
また、本発明に使用する水系エポキシ樹脂硬化剤は、前記エポキシ樹脂と混合し、また水分を良好に分散させることができるものであればよく、下記脂肪族ポリアミン、脂環式ポリアミン等を選択し、単独或いは組み合わせて使用する。 The water-based epoxy resin curing agent used in the present invention may be any one that can be mixed with the epoxy resin and can well disperse water. , used alone or in combination.
脂肪族ポリアミンは、アミノ基及びイミノ基を分子中に少なくとも2個以上有する脂肪族化合物であり、ジエチレントリアミン、トリエチレンテトラミン、テトラエチレンペンタミン、ペンタエチレンヘキサミン、ジエチルアミノプロピルアミン、ヘキサメチレンジアミン、トリメチルヘキサメチレンジアミン、ポリオキシプロピレンジアミン、イミノビスヘキシルアミン等がある。 Aliphatic polyamines are aliphatic compounds having at least two amino groups and imino groups in the molecule, and include diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, diethylaminopropylamine, hexamethylenediamine, trimethylhexa methylenediamine, polyoxypropylenediamine, iminobishexylamine, and the like.
脂環式ポリアミンは、アミノ基及びイミノ基を分子中に少なくとも2個以上有する脂環式化合物であり、キシリレンジアミン、3,9ビス(3-アミノプロピル)-2,4,8,10テトラオキサスピロ[5,5]ウンデカン、N-アミノエチルピペラジン、ビス(4-アミノシクロヘキシル)メタン等がある。 Alicyclic polyamines are alicyclic compounds having at least two amino groups and imino groups in the molecule, and include xylylenediamine, 3,9 bis(3-aminopropyl)-2,4,8,10 tetra oxaspiro[5,5]undecane, N-aminoethylpiperazine, bis(4-aminocyclohexyl)methane and the like.
この他、ポリエーテル等の親水性主鎖をエポキシ樹脂に導入し、過剰のアミンを反応させた自己乳化型硬化剤、脂肪族ポリアミンのエチレンオキサイド付加物、エポキシ樹脂付加物、ポリエチレンポリアミン変性物等の変性脂肪族ポリアミンや脂環式ポリアミンのモノグリシジルエーテル付加物、エポキシ樹脂付加物、アクリルニトリル付加物、フェノールホルマリン変性物(マンニッヒ変成物)、脂肪酸グリシジルエーテル付加物の変性脂環式ポリアミンやポリエチレンポリアミンへの脂肪酸、ポリエチレンポリアミンへのダイマー酸、キシリレンジアミン-ダイマー酸等の縮合反応生成物であるポリアミドアミン並びにこれらの変性物等が挙げられる。前記自己乳化型硬化剤の市販品例としてジョリエースJEX210B(アイカ工業(株)製エポキシ樹脂硬化剤、商品名、活性水素当量750、固形分18%水溶液、粘度7mPa・s/25℃)が挙げられる。 In addition, a hydrophilic main chain such as polyether is introduced into an epoxy resin, and an excess amine is reacted with a self-emulsifying curing agent, an ethylene oxide adduct of an aliphatic polyamine, an epoxy resin adduct, a modified polyethylene polyamine, etc. Monoglycidyl ether adducts of modified aliphatic polyamines and cycloaliphatic polyamines, epoxy resin adducts, acrylonitrile adducts, phenol formalin modified products (Mannich modified products), modified alicyclic polyamines and polyethylenes of fatty acid glycidyl ether adducts Examples include fatty acid to polyamine, dimer acid to polyethylene polyamine, polyamidoamine which is a condensation reaction product of xylylenediamine-dimer acid, and modified products thereof. Examples of commercially available products of the self-emulsifying curing agent include Jolyace JEX210B (epoxy resin curing agent manufactured by Aica Kogyo Co., Ltd., trade name, active hydrogen equivalent: 750, solid content: 18% aqueous solution, viscosity: 7 mPa·s/25°C). be done.
本発明に使用する非水系エポキシ樹脂硬化剤は、上記水系エポキシ樹脂硬化剤のように水分を良好に分散させ、所謂自己乳化型のエポキシ樹脂硬化剤ではなく、水分を良好に分散させることができない非自己乳化型のエポキシ樹脂硬化剤であり、上記脂肪族ポリアミン、脂環式ポリアミン等を選択し、単独或いは組み合わせて使用する。該非水系エポキシ樹脂硬化剤についても上記水系エポキシ樹脂硬化剤と同様に、エポキシ樹脂を導入し過剰のアミンを反応させたエポキシ樹脂付加物、ポリエチレンポリアミン変性物等の変性脂肪族ポリアミン、ポリエチレンポリアミンへのダイマー酸、キシリレンジアミン-ダイマー酸等の縮合反応生成物であるポリアミドアミン並びにこれらの変性物等を使用することが出来る。 The non-aqueous epoxy resin curing agent used in the present invention disperses water well like the water-based epoxy resin curing agent described above, but is not a so-called self-emulsifying epoxy resin curing agent and cannot disperse water well. It is a non-self-emulsifying epoxy resin curing agent, and the above aliphatic polyamines, alicyclic polyamines, etc. are selected and used alone or in combination. Regarding the non-aqueous epoxy resin curing agent, similarly to the water-based epoxy resin curing agent, an epoxy resin adduct obtained by introducing an epoxy resin and reacting excess amine, modified aliphatic polyamine such as polyethylene polyamine modified product, and polyethylene polyamine. Dimer acid, polyamidoamine which is a condensation reaction product of xylylenediamine-dimer acid, and modified products thereof can be used.
本発明の床仕上げ用水硬性エポキシ樹脂モルタル組成物は、水硬性セメントに対する水の重量比(水/水硬性成分であり、一般的にW/Cと呼称される)が0.1以上0.4以下であると堅固な硬化物となり、具体的には硬化後圧縮強度が21N/mm2以上となる。水硬性セメントと水の重量比が(水/水硬性分)が0.1未満では耐衝撃性が低下する場合があり、0.4超では、セルフレベリング性が低下して塗膜表面が平滑にならない場合がある。 The hydraulic epoxy resin mortar composition for floor finishing of the present invention has a weight ratio of water to hydraulic cement (water/hydraulic component, generally referred to as W/C) of 0.1 to 0.4. When it is below, the cured product becomes firm, and specifically, the compressive strength after curing becomes 21 N/mm 2 or more. If the weight ratio of hydraulic cement to water (water/hydraulic content) is less than 0.1, the impact resistance may decrease, and if it exceeds 0.4, the self-leveling property will decrease and the coating surface will be smooth. may not be
本発明の床仕上げ用水硬性エポキシ樹脂モルタル組成物において、水を含んだ全配合物の重量に対する、エポキシ樹脂に該エポキシ樹脂と反応する水系エポキシ樹脂硬化剤と非水系エポキシ樹脂硬化剤を加えたものを樹脂とした場合の樹脂固形分重量は、40%~60%が好ましく、40%未満では耐衝撃性が不十分となる場合があり、60%超では組成物全体の粘度が高くなり、下地コンクリート表面に塗付する際の施工作業性が低下する場合がある。 In the hydraulic epoxy resin mortar composition for floor finishing of the present invention, the weight of the entire formulation containing water is obtained by adding a water-based epoxy resin curing agent and a non-aqueous epoxy resin curing agent to the epoxy resin to react with the epoxy resin. The resin solid content weight when the resin is preferably 40% to 60%, and if it is less than 40%, the impact resistance may be insufficient, and if it exceeds 60%, the viscosity of the entire composition increases, and the base Construction workability may decrease when applying to concrete surfaces.
エポキシ樹脂のエポキシ当量と水系エポキシ樹脂硬化剤及び非水系エポキシ樹脂硬化剤との活性水素当量の当量比は、0.7~1.3であることが好ましく、0.7未満では硬化物の例えば圧縮強度が不十分な場合があり、1.3超では、過剰のアミン等により塗膜表面の仕上がりが不良となる場合がある。 The equivalent ratio of the epoxy equivalent of the epoxy resin to the active hydrogen equivalent of the aqueous epoxy resin curing agent and the non-aqueous epoxy resin curing agent is preferably 0.7 to 1.3. Compressive strength may be insufficient, and if it exceeds 1.3, the finish of the coating film surface may be poor due to excess amine or the like.
その他に本組成物に使用する材料として、AE減水剤、硬化促進剤、消泡剤、分散剤等を配合することが出来る。 In addition, an AE water reducing agent, a curing accelerator, an antifoaming agent, a dispersing agent, etc. can be blended as materials used in the present composition.
AE減水剤は、陰イオン系、非イオン系、陽イオン系又は両性イオン系のAE剤とリグニンスルホン酸塩系、高級多価アルコールのスルホン酸塩系、オキシ有機酸、アルキルアリールスルホン酸塩、ポリオキシエチレンアルキルエーテル系、ポリカルボン酸系又はポリオール複合体の減水剤、これらの複合または混合したものを使うことができるが、最も効果を有するものに変性ポリカルボン酸系又はポリエーテル・ポリカルボン酸系の高性能AE減水剤がある。変性ポリカルボン酸系AE減水剤の市販品例としてはMelflux AP101F((株)デグサコンストラクション、商品名)が、ポリエーテル・ポリカルボン酸系の高性能AE減水剤の市販品例としてはMelflux 2641F((株)デグサコンストラクション、商品名)が挙げられる。これらのAE減水剤は水硬性セメント100部に対し0.1重量部から1重量部を配合することにより本組成物をより低粘度とし、またT.I値を下げることが出来る。 AE water reducing agents include anionic, nonionic, cationic or zwitterionic AE agents and ligninsulfonate-based, higher polyhydric alcohol sulfonate-based, oxyorganic acids, alkylarylsulfonates, Polyoxyethylene alkyl ether-based, polycarboxylic acid-based, or polyol complex water-reducing agents, and combinations or mixtures thereof can be used. There are acid-based high performance AE water reducing agents. Melflux AP101F (manufactured by Degussa Construction Co., Ltd.) is a commercial example of a modified polycarboxylic acid-based AE water reducing agent, and Melflux 2641F (a commercial example of a polyether/polycarboxylic acid-based high-performance AE water reducing agent is Degussa Construction Co., Ltd., trade name). 0.1 to 1 part by weight of these AE water reducing agents are added to 100 parts of hydraulic cement to lower the viscosity of the composition. I value can be lowered.
また、硬化促進剤は、エポキシ樹脂と非水系エポキシ樹脂硬化剤の反応を促進するために配合することができ、例えば、2,4,6-トリス(ジメチルアミノメチル)フェノール等の3級アミンや、フェノール、クレゾール、ノニルフェノール、スチレン化フェノール、p-tert―ブチルフェノール等のアルキルフェノール等を使用することが出来る。 Curing accelerators can be added to accelerate the reaction between the epoxy resin and the non-aqueous epoxy resin curing agent. Examples include tertiary amines such as 2,4,6-tris(dimethylaminomethyl)phenol , phenol, cresol, nonylphenol, styrenated phenol, and alkylphenols such as p-tert-butylphenol.
消泡剤、分散剤等は一般的に塗料組成物や塗り床材組成物に使用させるものを適宜選択して使用することが出来る。 Antifoaming agents, dispersing agents and the like can be appropriately selected from those generally used in coating compositions and floor coating compositions.
組成物の混合形態として、エポキシ樹脂、水系エポキシ樹脂硬化剤、非水系エポキシ樹脂硬化剤、水、水硬性セメント、骨材が主たる配合物であるが、2液、1粉体とするのが使用に際して好ましい。すなわち、エポキシ樹脂、水系エポキシ樹脂硬化剤と非水系エポキシ樹脂硬化剤と水、骨材と水硬性セメントとするのが、混合・分散不十分、特性の失活、計量ミス・誤差を防ぐには好ましいが、別個に配合しても構わない。 The composition is mainly composed of epoxy resin, water-based epoxy resin curing agent, non-aqueous epoxy resin curing agent, water, hydraulic cement, and aggregate. It is preferable when In other words, epoxy resin, water-based epoxy resin curing agent and non-aqueous epoxy resin curing agent and water, and aggregate and hydraulic cement are used to prevent insufficient mixing/dispersion, deactivation of properties, and measurement errors/errors. Although preferred, they may be formulated separately.
本発明の組成物は下地コンクリートに2~4kg/m2塗付することが好ましく、2kg/m2未満4kg/m2超では表面仕上がり性が不良と成る場合がある。 The composition of the present invention is preferably applied to the base concrete in an amount of 2 to 4 kg/m 2 , and if the amount is less than 2 kg/m 2 and more than 4 kg/m 2 , the surface finish may be poor.
以下、実施例、比較例にて詳細に説明する。 Examples and comparative examples will be described in detail below.
<実施例及び比較例>
骨材として東北硅砂7号(JISG5901:2016の粒度区分と同じ)を使用した。東北硅砂7号は粒径0.212mm~0.045mm(平均粒径D50:185μm、比重2.58)である。エポキシ樹脂Aとして、ビスフェノールA型液状エポキシ樹脂 jER828(エポキシ当量190、固形分100%、商品名、三菱ケミカル社製)、エポキシ樹脂BとしてジョリエースJEX210A(アイカ工業(株)製エポキシ樹脂、商品名、エポキシ当量180、固形分100%、粘度0.7Pa・s/25℃)を、ウレタン変性エポキシ樹脂として、EPU-7N(エポキシ当量230、粘度:13000mP・s/25℃、ADEKA社製)を、水系エポキシ樹脂硬化剤Aとして、アンカミン670(商品名、活性水素当量220、水系変性脂肪族ポリアミン、固形分65%水溶液、Evonik社製)を、水系エポキシ樹脂硬化剤Bとして、ジョリエースJEX210B(アイカ工業(株)製エポキシ樹脂硬化剤、商品名、活性水素当量750、固形分18%水溶液、粘度7mPa・s/25℃)を使用し、非水系エポキシ樹脂硬化剤としてアンカミン2089K(活性水素当量75、非水系変性脂肪族ポリアミン、p-tert-ブチルフェノール50%)を使用し、水硬性セメントとしてホワイトセメント(太平洋セメント(株)製、白色ポルトランドセメント)を使用し、表1の配合にて実施例及び比較例の床仕上げ用水硬性エポキシ樹脂モルタル組成物を作製した。
<Examples and Comparative Examples>
Tohoku Silica Sand No. 7 (same as the particle size division of JISG5901:2016) was used as the aggregate. Tohoku Silica Sand No. 7 has a particle size of 0.212 mm to 0.045 mm (average particle size D 50 : 185 μm, specific gravity 2.58). As epoxy resin A, bisphenol A type liquid epoxy resin jER828 (epoxy equivalent 190, solid content 100%, trade name, manufactured by Mitsubishi Chemical Corporation), as epoxy resin B, Joriace JEX210A (epoxy resin manufactured by Aica Kogyo Co., Ltd., trade name , epoxy equivalent 180, solid content 100%, viscosity 0.7 Pa s / 25 ° C.), and EPU-7N (epoxy equivalent 230, viscosity: 13000 mP s / 25 ° C., manufactured by ADEKA) as a urethane-modified epoxy resin. , Ancamine 670 (trade name, active hydrogen equivalent 220, water-based modified aliphatic polyamine, solid content 65% aqueous solution, manufactured by Evonik) as a water-based epoxy resin curing agent A, and Jolie Ace JEX210B as a water-based epoxy resin curing agent B ( Aica Kogyo Co., Ltd. epoxy resin curing agent, trade name, active hydrogen equivalent 750, solid content 18% aqueous solution, viscosity 7 mPa s / 25 ° C.), Ancamine 2089K (active hydrogen equivalent 75, non-aqueous modified aliphatic polyamine, p-tert-butylphenol 50%), white cement (manufactured by Taiheiyo Cement Co., Ltd., white Portland cement) is used as hydraulic cement, and the formulation shown in Table 1 is used. Hydraulic epoxy resin mortar compositions for floor finishing of Examples and Comparative Examples were prepared.
<評価項目及び評価方法> <Evaluation items and evaluation methods>
<水硬性セメントに対する水の重量比>
水硬性セメントと水系エポキシ樹脂硬化剤に含まれる水分とから、水硬性セメントに対する水の重量比を算出した。
<Weight ratio of water to hydraulic cement>
The weight ratio of water to hydraulic cement was calculated from the water contained in the hydraulic cement and the water-based epoxy resin curing agent.
<樹脂量>
エポキシ樹脂に水系エポキシ樹脂硬化剤及び非水系エポキシ樹脂硬化剤の固形分を加えたものを樹脂固形分とした場合の樹脂固形分重量の、水を含んだ本発明の組成物全体の重量に対する割合(%)を算出した。
<Resin amount>
The ratio of the weight of the resin solid content to the weight of the entire composition of the present invention containing water, when the resin solid content is the sum of the solid content of the water-based epoxy resin curing agent and the non-aqueous epoxy resin curing agent to the epoxy resin. (%) was calculated.
<塗膜硬化性>
23℃24時間以上放置した実施例及び比較例の組成物を、該温度下で、JISA5371に規定する300mm×300mm×60mmのコンクリート平板(下地)に(表面をサンドペーパー(No.180)で研磨し十分に清掃したもの)、厚さ約2mm(塗付量3.0kg/m2)に塗付する。塗付24時間後にJIS K 7205に準拠してショアD硬度を測定し、60以上を〇、60未満を×と評価した。
<Coating film curability>
The compositions of Examples and Comparative Examples left at 23 ° C. for 24 hours or more are placed on a concrete flat plate (base) of 300 mm × 300 mm × 60 mm specified in JISA5371 at that temperature (the surface is polished with sandpaper (No. 180) and thoroughly cleaned) to a thickness of about 2 mm (amount of application: 3.0 kg/m 2 ). Shore D hardness was measured according to JIS K 7205 24 hours after application, and 60 or more was evaluated as ◯, and less than 60 was evaluated as x.
<表面平滑性>
90×90cmの8mm厚のフレキシブル板を水平に置き、これに金鏝で実施例及び比較例の組成物を3.0kg/m2で塗付し、硬化後1メートル高さから硬化した塗膜表面を目視観察する。骨材の分散ムラ、塗膜のピンホールやクレータなどの表面欠陥が無く平滑なものを○、これ以外を×と評価した。
<Surface smoothness>
A flexible plate of 90 x 90 cm with a thickness of 8 mm was placed horizontally, and the compositions of Examples and Comparative Examples were applied at 3.0 kg/m 2 with a metal trowel, and after curing, the coating film was cured from a height of 1 m. Visually observe the surface. A smooth surface without uneven distribution of aggregates, pinholes, craters, or other surface defects in the coating film was evaluated as ◯, and other than this was evaluated as x.
<塗付作業性>
90×90cmの8mm厚のフレキシブル板を水平に置き、これに実施例及び比較例の組成物を塗付量3.0kg/m2で金鏝にて塗付する。全てを目隠しサンプルとして官能評価し、金鏝が重くないものを○とし、それ以外のものを×とした。ここで金鏝が重くないというのは、金鏝にかかる力がおおよそ1N以下となるものである。
<Coating workability>
A flexible plate of 90×90 cm and 8 mm thick is placed horizontally, and the compositions of Examples and Comparative Examples are applied to it with a metal trowel at a coating amount of 3.0 kg/m 2 . Sensory evaluation was carried out on all of them as blindfolded samples, and the ones where the metal iron was not heavy were rated as ◯, and the other ones were rated as x. Here, the trowel is not heavy when the force applied to the trowel is about 1N or less.
<圧縮強さ>
試験片の形状はJISK6911に規定する縦12.7mm×横12.7mm×高差25.4mmとし、これと同形状の金型に、均一に混合した実施例及び比較例の各材料を充填することにより成形した。7日間金型内で養生した後、試験片を金型より取り出し試験体とした。万能試験機(インストロン5500R)によりクロスヘッド移動速度1±0.5mm/minで荷重を加え、試験片が破壊した時の荷重を(N)で測定し圧縮強さ(N/mm2)を算出した。圧縮強度が21N/mm2以上を〇、これ以外を×と評価した。
<Compressive strength>
The shape of the test piece is 12.7 mm long x 12.7 mm wide x 25.4 mm high as defined in JISK6911, and the uniformly mixed materials of Examples and Comparative Examples are filled in a mold of the same shape. It was molded by After curing in the mold for 7 days, the test piece was removed from the mold and used as a test piece. A load is applied with a universal testing machine (Instron 5500R) at a crosshead moving speed of 1 ± 0.5 mm / min, and the load (N) when the test piece breaks is measured and the compressive strength (N / mm 2 ) is calculated. Calculated. A compressive strength of 21 N/mm 2 or more was evaluated as ◯, and other than this was evaluated as x.
<付着性>
下地としてJIS A 5371規定の舗道板(300×300×60mm)を使用し、20℃湿度50%RHで、実施例及び比較例の組成物を3.0kg/m2で塗付し7日間養生して試験体とした。その後、建研式引張試験機にて付着性試験を行い、付着強度が2.0N/mm2以上であって、その際の破壊形態が舗道板の凝集破壊を〇、それ以外を×と評価した。
<Adhesion>
A pavement board (300 x 300 x 60 mm) specified in JIS A 5371 was used as the base, and the compositions of Examples and Comparative Examples were applied at 3.0 kg/m 2 at 20°C and 50% RH, and cured for 7 days. and used as a test specimen. After that, an adhesion test was performed with a construction research type tensile tester, and the adhesion strength was 2.0 N / mm 2 or more, and the failure mode at that time was evaluated as 〇 for cohesive failure of the pavement board, and as × for others. bottom.
<耐衝撃性>
下地としてJIS A 5371規定の舗道板(300×300×60mm)を使用し、20℃湿度50%RHで、実施例及び比較例の組成物を3.0kg/m2で塗付し7日間養生して試験体とした。該試験体についてNNK-0002に準拠し、落球衝撃試験(1kg鋼球の1m落下)を行い、舗道板にクラックが発生する落球回数または塗膜に割れが生じる落球回数を測定し、30回以上を〇、30回未満を×と評価した。
<Impact resistance>
A pavement board (300 x 300 x 60 mm) specified in JIS A 5371 was used as the base, and the compositions of Examples and Comparative Examples were applied at 3.0 kg/m 2 at 20°C and 50% RH, and cured for 7 days. and used as a test specimen. According to NNK-0002, the specimen was subjected to a falling ball impact test (a 1 kg steel ball dropped by 1 m), and the number of falling balls that caused cracks in the pavement board or the number of falling balls that caused cracks in the coating film was measured, and the number was 30 times or more. was evaluated as ◯, and less than 30 times as x.
表2に実施例と比較例の評価結果を示す。 Table 2 shows the evaluation results of Examples and Comparative Examples.
Claims (3)
A method for applying a hydraulic epoxy resin mortar composition for floor finishing, which comprises applying the hydraulic epoxy resin mortar composition for floor finishing according to claim 1 or 2 to the surface of a concrete base in an amount of 2 to 4 kg/m 2 .
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