JP7377825B2 - Conductive coated floor structure and method for forming the same - Google Patents

Description

The present invention includes a conductive primer layer formed on the surface of the subfloor concrete, and a conductive water-based polymer cement composition applied on the conductive primer layer at a coating amount of 2.5 to 4.5 kg/ ^m2. The present invention relates to a conductive floor structure comprising the formed conductive aqueous polymer cement composition layer, and a method for forming the same.

Conventionally, as described in Patent Document 1, as a composition for forming a conductive coated floor structure on the surface of subfloor concrete, the basic components are a polyol composition, water, polyisocyanate, and hydraulic cement, and isotropic PITCH is used. A polyurethane-based cement composition has been proposed, which is characterized by containing short carbon fibers and PAN-based carbon fibers. However, such a polyurethane-based cement composition has a problem in that the shrinkage force of the coating film is extremely large, so that it easily peels off when simply applied to the surface of the subfloor concrete.

Patent Document 2 proposes a hydraulic polymer cement composition containing a polyol, a catalyst, a polyisocyanate, cement, aggregate, and water, and this hydraulic polymer cement composition also had the same problem as described above. . In order to solve this problem, the same patent document discloses a hydraulic polymer cement composition comprising a polyol, a catalyst, a polyisocyanate, cement, an aggregate, and water, in which the polyol is a castor oil-modified trifunctional polyol and bisphenol A. A hydraulic polymer cement composition comprising a tetrafunctional polyol having a skeleton and a bifunctional polyether polyol having a bisphenol A skeleton, and containing a polyol, a catalyst, a polyisocyanate, cement, aggregate, and water, the polyol being castor The composition is composed of an oil-modified trifunctional polyol, a tetrafunctional polyol having a bisphenol A skeleton, and a bifunctional polyether polyol having a bisphenol A skeleton. Since the coating thickness is 6 to 9 mm, a groove with a depth of 7 to 13 mm and a width of 7 to 13 mm is provided at the edge of the subfloor concrete, and the distance between the opposing grooves is 12 m. If there is a large number of joints, a joint with a depth of 7 to 13 mm and a width of 7 to 13 mm is provided every 12 m from the groove, and while filling the composition described in Patent Document 3 in the groove and the joint, However, since the film thickness of the conductive coated floor structure of the present invention is less than 3.5 mm, the shape of the groove part may be small based on experience). If a groove with a depth of 3 to 7 mm and a width of 3 to 7 mm is provided, and the distance between opposing grooves exceeds 12 m, a groove with a depth of 3 to 7 mm and a width of 3 to 7 mm is provided every 12 m from the groove. There is a problem in that it is necessary to create joints and apply the composition to the subfloor concrete while filling the grooves and joints, and this application method is laborious and time-consuming. There was a problem with high costs.

To solve this problem, Patent Document 3 proposes a hydraulic polymer cement composition containing a water-dispersed polyol, a polyisocyanate, an organometallic catalyst, a hydraulic cement, and an aggregate, which reduces the shrinkage of the coating film. A paste-like hydraulic polymer that does not cause the paint film to peel off due to low stress, eliminates the need to provide joints as in the above construction method, and is applied to the subfloor concrete surface to a depth of 0.2 mm or more and less than 4.0 mm. Cement compositions have been proposed.

Patent No. 5160522 JP2015-81325A JP2020-37508A

However, when polymethylpolyphenyl polyisocyanate is used as the polyisocyanate, the compositions of Patent Documents 1 and 2 yellow significantly due to ultraviolet rays, and the color tone of the composition applied to the floor changes. The problem is that it eventually turns brown and spoils its aesthetic appearance.

Further, the composition of Patent Document 3 has a problem in that fine cracks may occur on the surface of the coating film over time.

The problem to be solved by the present invention is to form a conductive primer layer on the surface of the subfloor concrete, and to apply a conductive water-based polymer cement composition on the conductive primer layer in an amount of 2.5 to 4.5 kg/m. This is a conductive coating floor structure consisting of a conductive water-based polymer cement composition layer formed by applying ^{step 2} , and the shrinkage stress of the coating film forming the conductive coating floor structure is small, so that the coating film shrinks. Depending on stress, it will not peel off from the subfloor concrete, and as a result, when forming a conductive coated floor structure on the subfloor concrete, a groove 3 to 7 mm deep and 3 to 7 mm wide is formed at the edge of the subfloor concrete. There is no need to provide joints with a depth of 3 to 7 mm and a width of 3 to 7 mm every 12 meters from the groove, and furthermore, the color tone does not change due to ultraviolet rays, the appearance is excellent, and the electrical resistance of the coating surface is reduced. An object of the present invention is to provide a conductive coated floor structure that has excellent antistatic properties of more than 0.01 MΩ and less than 100 MΩ under the condition of an applied voltage of 500 V in the NFPA method, and that hardly causes minute cracks over time, and a method for forming the same. .

In order to solve the above problem, the invention according to claim 1 includes a conductive primer layer formed on the surface of the subfloor concrete, and a conductive water-based polymer cement composition applied in an amount of 2.5 to 2.5 to A conductive painted floor structure consisting of a conductive water-based polymer cement composition layer formed by coating at 4.5 kg/ ^m2 ,
The conductive water-based polymer cement composition comprises a water-dispersed polyol, a polyisocyanate, an organometallic catalyst, carbon fibers, hydraulic cement, and aggregate,
The water-dispersed polyol contains water and at least a castor oil-based trifunctional polyol, and has a hydroxyl equivalent of 200 to 800, and the water-dispersed polyol is in an amount of 10 to 30 parts by weight based on 100 parts by weight of the conductive water-based polymer cement composition.
The polyisocyanate consists of an aliphatic isocyanurate, and the polyisocyanate is 20 to 40 parts by weight in 100 parts by weight of the conductive aqueous polymer cement composition;
The carbon fibers have a length of 0.01 to 2.5 mm and a diameter of 5 to 20 μm, and the carbon fibers are 0.05 to 0.2 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition.
The hydraulic cement is 10 to 20 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition,
The aggregate is 20 to 40 parts by weight per 100 parts by weight of the conductive water-based polymer cement composition.
Provided is a conductive coated floor structure characterized by the following.

The invention according to claim 2 provides a conductive primer layer formed on the surface of the subfloor concrete, and a conductive water-based polymer cement composition applied on the conductive primer layer at a coating amount of 2.5 to 4.5 kg/m ^{2 .} A conductive coated floor structure comprising: a conductive water-based polymer cement composition layer formed by coating;
The conductive water-based polymer cement composition comprises a water-dispersed polyol, a polyisocyanate, an organometallic catalyst, carbon fibers, hydraulic cement, and aggregate,
The water-dispersed polyol contains water, a castor oil-based trifunctional polyol, and a castor oil-based bifunctional polyol, and has a hydroxyl equivalent of 200 to 600, and the water-dispersed polyol contains 10 to 30 parts by weight of the conductive water-based polymer cement composition. parts by weight,
The castor oil-based bifunctional polyol is more than 0 parts by weight and not more than 40 parts by weight in 100 parts by weight of the water-dispersed polyol,
The polyisocyanate consists of an aliphatic isocyanurate, and the polyisocyanate is 20 to 40 parts by weight in 100 parts by weight of the conductive aqueous polymer cement composition;
The carbon fibers have a length of 0.01 to 2.5 mm and a diameter of 5 to 20 μm, and the carbon fibers are 0.05 to 0.2 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition.
The hydraulic cement is 10 to 20 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition,
The aggregate is 20 to 40 parts by weight per 100 parts by weight of the conductive water-based polymer cement composition.
Provided is a conductive coated floor structure characterized by the following.

The invention according to claim 3 provides a conductive primer layer formed on the surface of the subfloor concrete, and a conductive water-based polymer cement composition applied on the conductive primer layer at a coating amount of 2.5 to 4.5 kg/m ^{2 .} A conductive coated floor structure comprising: a conductive water-based polymer cement composition layer formed by coating;
The conductive water-based polymer cement composition comprises a water-dispersed polyol, a polyisocyanate, an organometallic catalyst, carbon fibers, hydraulic cement, and aggregate,
The water-dispersed polyol contains water, a castor oil-based trifunctional polyol, and a tetrafunctional polyol having a bisphenol A skeleton, and has a hydroxyl equivalent of 500 to 800. ~30 parts by weight,
The castor oil-based trifunctional polyol is more than 30 parts by weight and not more than 50 parts by weight in 100 parts by weight of the water-dispersed polyol,
The polyisocyanate consists of an aliphatic isocyanurate, and the polyisocyanate is 20 to 40 parts by weight in 100 parts by weight of the conductive aqueous polymer cement composition;
The carbon fibers have a length of 0.01 to 2.5 mm and a diameter of 5 to 20 μm, and the carbon fibers are 0.05 to 0.2 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition.
The hydraulic cement is 10 to 20 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition,
The aggregate is 20 to 40 parts by weight per 100 parts by weight of the conductive water-based polymer cement composition.
Provided is a conductive coated floor structure characterized by the following.

The invention according to claim 4 provides the conductive painted floor structure according to any one of claims 1 to 3, wherein the polyisocyanate is hexamethylene diisocyanurate.

The invention according to claim 5 is characterized in that the electrical resistance of the coating film surface is more than 0.01 MΩ and less than 100 MΩ under the condition of an applied voltage of 500 V in the NFPA (National Fire Protection Association) method. A conductive coated floor structure according to any one of Item 4 is provided.

The invention of claim 6 provides a method of applying a conductive primer to the surface of the subfloor concrete to form a conductive primer layer, and then applying a conductive water-based polymer cement composition on the conductive primer layer in an amount of 2.5 to 4. .5 kg/m ² to form a conductive water-based polymer cement composition layer to form the conductive painted floor structure according to any one of claims 1 to 5. A method of forming a conductive coated floor structure is provided.

The conductive coated floor structure of the present invention has the advantage that shrinkage stress, which is the stress generated inside the coating film forming the conductive coated floor structure, is extremely small. For this purpose, a conductive primer layer is formed by applying a conductive primer to the surface of the subfloor concrete, and a conductive water-based polymer cement composition is applied on the conductive primer layer in an amount of 2.5 to 4.5 kg/m2 ^. When a conductive coated floor structure is formed by coating with a conductive water-based polymer cement composition layer, the paint film may peel off due to shrinkage stress between the layers of the paint film and at the interface with the subfloor concrete. The effect is that there is nothing to do.

In addition, in the conductive coated floor structure of the present invention, since the shrinkage stress of the coating film forming the conductive coated floor structure is extremely small as described above, when forming the conductive coated floor structure, it is necessary to use the subfloor concrete instead of the conventional method. There is an effect that there is no need to provide joints with a depth of 3 to 7 mm and a width of 3 to 7 mm at edges or every 12 m on the surface of the subfloor concrete. Therefore, the conductive primer and conductive water-based polymer cement composition forming the conductive coated floor structure of the present invention can be easily and quickly applied to the subfloor concrete surface, and as a result, It has the effect of being low cost.

Further, the conductive painted floor structure of the present invention has the effect of having sufficient impact resistance.

In addition, in the conductive coated floor structure of the present invention, since the polyisocyanate contained in the conductive water-based polymer cement composition forming the outermost layer is composed of aliphatic isocyanurate, the coating film yellows due to sunlight, ultraviolet rays, etc. There is no need to do anything, and it has the effect of being aesthetically pleasing.

Furthermore, the conductive coated floor structure of the present invention has excellent electrical conductivity (electrification) in which the electrical resistance of the coated film surface is more than 0.01 MΩ and less than 100 MΩ under the condition of an applied voltage of 500 V according to the National Fire Protection Association (NFPA) method. It has the effect of having preventive properties).

In addition, in the conductive water-based polymer cement composition forming the conductive painted floor structure of the present invention, the coating film contains carbon fiber as a conductive filler, but conventionally, the coated flooring material of the present invention and Materials that impart conductivity to resin compositions such as adhesives include conductive metals such as iron, silver, copper, nickel, chromium, aluminum, zinc, or alloys thereof, powders of their oxides, titanium oxide, etc. Powder of potassium titanate etc. surface-treated with copper oxide, antimony oxide, etc., conductive inorganic materials such as artificial graphite, carbon fiber, graphite, etc., or mixtures thereof can be used. By repeating this process, carbon fibers are selected from among many conductive fillers, and at the same time, sufficient conductivity is imparted to the conductive water-based polymer cement composition for forming the conductive coating floor structure of the present invention. It was discovered that the strength of the membrane was strengthened. As a result, the conductive coated floor structure of the present invention has the effect that minute cracks hardly occur on the coated film surface over time.

In addition, even if conductivity is imparted to the paint film simply by blending carbon fibers, there may be lumps entangled with carbon fibers or carbon particles that are pushed up when air bubbles contained in the material move to the paint film surface. Problems such as the paint film not having a smooth finish due to protrusions of fibers, etc. can occur, but as a result of repeated trial and error and experiments, the present inventor has found that the conductive coating floor structure of the present invention improves the finish of the paint film, conductivity, It has the effect that all of the properties and fine crack resistance are good.

It is a paint film peeling model diagram, viewed from the cross-sectional direction of the paint film, in which the paint film of the flooring material applied to the surface of the base concrete is peeled off at an angle of 5 degrees due to the paint film shrinkage force T. FIG. 3 is a diagram showing the relationship between the surface tensile strength and laitance residual rate of base concrete with a water-cement ratio of 60%.

The present invention will be explained in detail below.

The conductive coated floor structure of the present invention includes a conductive primer layer formed on the surface of the subfloor concrete, and a conductive water-based polymer cement composition formed on the conductive primer layer. A conductive coated floor structure comprising a conductive water-based polymer cement composition layer formed by coating at a coating amount of 2.5 to 4.5 kg/ ^m2 ,
The conductive water-based polymer cement composition comprises a water-dispersed polyol, a polyisocyanate, an organometallic catalyst, carbon fibers, hydraulic cement, and aggregate,
The water-dispersed polyol contains water and at least a castor oil-based trifunctional polyol, and has a hydroxyl equivalent of 200 to 800, and the water-dispersed polyol is in an amount of 10 to 30 parts by weight based on 100 parts by weight of the conductive water-based polymer cement composition.
The polyisocyanate consists of an aliphatic isocyanurate, and the polyisocyanate is 20 to 40 parts by weight in 100 parts by weight of the conductive aqueous polymer cement composition;
The carbon fibers have a length of 0.01 to 2.5 mm and a diameter of 5 to 20 μm, and the carbon fibers are 0.05 to 0.2 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition.
The hydraulic cement is 10 to 20 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition,
The aggregate is 20 to 40 parts by weight per 100 parts by weight of the conductive water-based polymer cement composition.
The conductive water-based polymer cement composition may optionally contain additives such as coloring pigments, extender pigments, dispersants, antifoaming agents, diluents, etc. can be blended.

Further, in the conductive coated floor structure according to claim 2, a conductive primer layer formed on the surface of the subfloor concrete, and a conductive water-based polymer cement composition applied on the conductive primer layer in an amount of 2.5 to 50%. A conductive painted floor structure consisting of a conductive water-based polymer cement composition layer formed by coating at 4.5 kg/ ^m2 ,
The conductive water-based polymer cement composition comprises a water-dispersed polyol, a polyisocyanate, an organometallic catalyst, carbon fibers, hydraulic cement, and aggregate,
The water-dispersed polyol contains water, a castor oil-based trifunctional polyol, and a castor oil-based bifunctional polyol, and has a hydroxyl equivalent of 200 to 600, and the water-dispersed polyol contains 10 to 30 parts by weight of the conductive water-based polymer cement composition. parts by weight,
The castor oil-based bifunctional polyol is more than 0 parts by weight and not more than 40 parts by weight in 100 parts by weight of the water-dispersed polyol,
The polyisocyanate consists of an aliphatic isocyanurate, and the polyisocyanate is 20 to 40 parts by weight in 100 parts by weight of the conductive aqueous polymer cement composition;
The carbon fibers have a length of 0.01 to 2.5 mm and a diameter of 5 to 20 μm, and the carbon fibers are 0.05 to 0.2 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition.
The hydraulic cement is 10 to 20 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition,
The aggregate is 20 to 40 parts by weight per 100 parts by weight of the conductive water-based polymer cement composition.
The conductive water-based polymer cement composition may optionally contain additives such as coloring pigments, extender pigments, dispersants, antifoaming agents, diluents, etc. can be blended.

Further, in the conductive coated floor structure according to claim 3, a conductive primer layer formed on the surface of the subfloor concrete, and a conductive water-based polymer cement composition applied on the conductive primer layer in an amount of 2.5 to 2.5 to A conductive painted floor structure consisting of a conductive water-based polymer cement composition layer formed by coating at 4.5 kg/ ^m2 ,
The conductive water-based polymer cement composition comprises a water-dispersed polyol, a polyisocyanate, an organometallic catalyst, carbon fibers, hydraulic cement, and aggregate,
The water-dispersed polyol contains water, a castor oil-based trifunctional polyol, and a tetrafunctional polyol having a bisphenol A skeleton, and has a hydroxyl equivalent of 500 to 800. ~30 parts by weight,
The castor oil-based trifunctional polyol is more than 30 parts by weight and not more than 50 parts by weight in 100 parts by weight of the water-dispersed polyol,
The polyisocyanate consists of an aliphatic isocyanurate, and the polyisocyanate is 20 to 40 parts by weight in 100 parts by weight of the conductive aqueous polymer cement composition;
The carbon fibers have a length of 0.01 to 2.5 mm and a diameter of 5 to 20 μm, and the carbon fibers are 0.05 to 0.2 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition.
The hydraulic cement is 10 to 20 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition,
The aggregate is 20 to 40 parts by weight per 100 parts by weight of the conductive water-based polymer cement composition.
The conductive water-based polymer cement composition may optionally contain additives such as coloring pigments, extender pigments, dispersants, antifoaming agents, diluents, etc. can be blended.

Conductive Primer The conductive primer of the present invention is made by dispersing a conductive filler in a resin serving as a binder. As the conductive filler, those conventionally blended in resin compositions such as floor coating materials and adhesives such as those of the present invention can be used, and iron, silver, copper, nickel, chromium, aluminum, zinc, or any of the above may be used. Conductive metals such as alloys and powders of their oxides, powders of titanium oxide and potassium titanate surface-treated with copper oxide, antimony oxide, etc., conductive inorganic materials such as artificial graphite, carbon fiber, graphite, etc. or a mixture thereof. Furthermore, the resin serving as the binder may be any resin commonly used as floor coating materials, such as epoxy resin and urethane resin.

The conductive primer that can be used to form the conductive coated floor structure of the present invention is one that conducts electricity at least in the continuous direction of the coating film, and is suitable for use on the base material such as subfloor concrete or coated floor material, and on the conductive primer. It has excellent adhesion with the applied conductive water-based polymer cement composition, and the shrinkage stress of the conductive primer layer to be formed is small, so the coating film will not peel off from the base material due to shrinkage stress. When used with the conductive water-based polymer cement composition forming the conductive painted floor structure of the present invention, a conductive painted floor structure that satisfies the following evaluation items can be used.

Commercially available conductive primers such as those described above include Joliece JE-2560, which is a conductive primer made of solvent-based epoxy resin (bisphenol A epoxy resin, modified polyamide amine, solid content: 40%, artificial graphite: 18%, Jolie Ace JA-60 (manufactured by Aica Kogyo Co., Ltd., trade name), a water-based epoxy resin conductive primer (bisphenol A epoxy resin, modified polyamide amine, solid content: 60%, water: 40%, artificial graphite: 18%) , manufactured by Aica Kogyo Co., Ltd., product name), and Jolie Ace JJ-565, a water-based hard urethane resin conductive primer (polyol emulsion, 4,4'-diphenylmethane diisocyanate, cement aggregate, solid content: 95%, water) : 5%, isotropic PITCH carbon fiber: 0.3%, PAN carbon fiber: 0.1%, manufactured by Aica Kogyo Co., Ltd. (trade name), etc., and the like can be used.

Conductive Water-Based Polymer Cement Composition The conductive water-based polymer cement composition of the present invention comprises a water-dispersed polyol, a polyisocyanate, an organometallic catalyst, carbon fibers, hydraulic cement, and aggregate. It is.

In the conductive aqueous polymer cement composition of the present invention, the ratio of the number of moles of hydroxyl groups (OH) contained in the water-dispersed polyol to the number of moles of isocyanate groups (NCO) contained in the polyisocyanate (hereinafter referred to as NCO/OH molar ratio) is not particularly limited, but is preferably from 1.0 to 7.2, more preferably from 2.0 to 6.5. If it is less than 0.5, the crosslinking rate of the coating film will be low, resulting in poor curability and insufficient impact resistance. If it is more than 3.5, unreacted isocyanate will remain, which will adversely affect the initial curing property. This may cause poor finish such as blistering or blistering. Furthermore, if the NCO/OH molar ratio is within the range of 1.0 to 7.2, the firing caused by carbon dioxide during the curing reaction can be minimized, and the work due to the volatilization of unreacted polyfunctional isocyanate compounds is possible. Has little negative impact on the environment.

The method for calculating the number of moles of isocyanate groups (NCO) contained in the above polyisocyanate is as follows:
Isocyanate group (mol) = number of blended parts x (NCO%/100) ÷ 42
The method for calculating the number of moles of hydroxyl groups (OH) contained in the above water-dispersed polyol is as follows:
Hydroxyl group (mol) = number of blended parts ÷ hydroxyl group equivalent, and the calculation method for the NCO/OH molar ratio is as follows:
NCO/OH molar ratio = isocyanate group (mol) ÷ hydroxyl group (mol)
It is.

The conductive painted floor structure exhibits its function by conducting electricity in the thickness direction of the paint film and in the continuous direction (substantially horizontal direction) of the paint film, and the curing of the conductive water-based polymer cement composition of the present invention Since the object can conduct electricity only in the thickness direction of the coating film, it is necessary to use a conductive primer that can conduct electricity in the continuous direction of the coating film. In other words, a conductive primer is applied to the surface of the subfloor concrete to form a conductive primer layer, and then a conductive water-based polymer cement composition is applied on top of the conductive primer layer to form a conductive water-based polymer cement composition layer. By forming this, a coated floor structure that can conduct electricity in the thickness direction of the coating film and in the continuous direction of the coating film, that is, a conductive coated floor structure is formed.

<Water-dispersed polyol>
In the conductive coated floor structure according to claim 1, the water-dispersed polyol used in the present invention includes at least a castor oil-based trifunctional polyol, and the castor oil-based trifunctional polyol is castor oil or a derivative thereof. Examples include triglycerides, diglycerides, monoglycerides of castor oil fatty acids, and mixtures thereof, and polyols having three hydroxyl groups. The hydroxyl equivalent of the water-dispersed polyol used in the present invention is preferably 200 to 800. If it is less than 200, the conductive water-based polymer cement composition will harden quickly and the workability will be poor, and if it exceeds 800, the conductive water-based polymer cement composition The strength of the cured coating film becomes insufficient. The content of the water-dispersed polyol is preferably 10 to 30 parts by weight based on 100 parts by weight of the conductive aqueous polymer cement composition. If it is less than 10 parts by weight, the strength of the cured product of the composition will decrease, and if it exceeds 30 parts by weight, the composition will deteriorate. Workability decreases when applying with a metal trowel.

In the conductive coated floor structure according to claim 2, the water-dispersed polyol used in the present invention is composed of water, a castor oil-based trifunctional polyol, and a castor oil-based bifunctional polyol, and the castor oil-based trifunctional polyol is Similarly to the above, castor oil and its derivatives, such as triglycerides, diglycerides, monoglycerides of castor oil fatty acids, and mixtures thereof, are polyols having 3 hydroxyl groups, and castor oil-based bifunctional polyols are castor oil or its derivatives. Derivatives can be used, which are polyols having two hydroxyl groups. The hydroxyl equivalent of the water-dispersed polyol used in the present invention is preferably 200 to 600. If it is less than 200, the conductive water-based polymer cement composition will harden quickly and the workability will be poor, and if it exceeds 600, the conductive water-based polymer cement composition will have poor workability. The strength of the composition after curing is insufficient. The content of the water-dispersed polyol is preferably 10 to 30 parts by weight based on 100 parts by weight of the conductive aqueous polymer cement composition. If it is less than 10 parts by weight, the strength of the cured product of the composition will decrease, and if it exceeds 30 parts by weight, the composition will deteriorate. Workability decreases when applying with a metal trowel.

The castor oil-based bifunctional polyol in the water-dispersed polyol in the conductive water-based polymer cement composition according to claim 2 is more than 0 parts by weight and not more than 40 parts by weight, and more than 40 parts by weight based on 100 parts by weight of the water-dispersed polyol. In this case, the impact resistance may become insufficient.

The drop in impact resistance caused by including a castor oil-based bifunctional polyol as a substitute for the castor oil-based trifunctional polyol can be compensated for by incorporating glycerin as a crosslinking agent. Specifically, the impact resistance of the conductive coated floor structure is set as specified in the evaluation items below, and it can be used as a conductive coated floor structure that requires this performance. For this reason, a castor oil-based bifunctional polyol is blended, and if better impact resistance is required, glycerin is further blended.

The amount of glycerin that can be used is more than 0 parts by weight and 5 parts by weight or less based on 100 parts by weight of the conductive water-based polymer cement composition, and the impact resistance that has become insufficient due to the addition of the castor oil-based bifunctional polyol is Add an amount to compensate for the

In the conductive coating floor structure according to claim 3, the water-dispersed polyol used in the present invention includes water, a castor oil-based trifunctional polyol, and a tetrafunctional polyol having a bisphenol A skeleton, and includes a castor oil-based trifunctional polyol. As mentioned above, is castor oil and its derivatives, such as triglycerides, diglycerides, monoglycerides of castor oil fatty acids, and mixtures thereof, and is a polyol having 3 hydroxyl groups. The hydroxyl equivalent of the castor oil-based trifunctional polyol used in the present invention is preferably 250 to 450; if it is less than 250, the shrinkage stress of the cured product becomes large and the coating film may peel off from the underlying concrete, or the curing becomes rapid and workability is improved. If it exceeds 450, the conductive water-based polymer cement composition will have insufficient strength after curing. Further, the content of the castor oil-based trifunctional polyol in the water-dispersed polyol is preferably more than 30 parts by weight and 50 parts by weight or less based on 100 parts by weight of the water-dispersed polyol; if it is less than 30 parts by weight, the strength may be insufficient; Impact resistance may be insufficient if the thickness is too high.

The tetrafunctional polyol having a bisphenol A skeleton is an epoxy ring-opening polyol obtained by reacting an active hydrogen compound with a polyepoxy compound having a bisphenol A skeleton, and preferably has a hydroxyl equivalent of 250 to 450. If the hydroxyl equivalent is less than 250, the shrinkage stress of the cured product may become large and the coating may peel off from the underlying concrete, or the curing may become rapid, resulting in poor workability; if it exceeds 450, the conductive water-based polymer cement composition may As a result, the strength after curing may be insufficient. Further, the content of the tetrafunctional polyol having a bisphenol A skeleton in the water-dispersed polyol is preferably more than 2 parts by weight and 15 parts by weight or less based on 100 parts by weight of the water-dispersed polyol, and if it is less than 2 parts by weight, the strength may be insufficient. If it exceeds 15 parts by weight, impact resistance may become insufficient. The content of the water-dispersed polyol is preferably 10 to 30 parts by weight based on 100 parts by weight of the conductive aqueous polymer cement composition. If it is less than 10 parts by weight, the strength of the cured product of the composition will decrease, and if it exceeds 30 parts by weight, the composition will deteriorate. Workability decreases when applying with a metal trowel.

<Polyisocyanate>
The polyisocyanate used in the present invention is obtained from an aliphatic polyisocyanate and consists of an aliphatic isocyanurate having an isocyanurate structure. Specifically, hexamethylene diisocyanurate obtained by cyclizing and trimerizing 1,6 hexamethylene diisocyanate is preferred because it has excellent weather resistance and improves the hardness of the coating film. In order to cyclize and trimerize 1,6 hexamethylene diisocyanate, the method described in JP-A-01-33115 can be used. Cyclic diisocyanates and other prepolymers thereof can be used in combination, and polyisocyanate containing 99% by weight or more is used.

Further, as the polyisocyanate used in the present invention, one having an NCO% of 15 to 25% by weight can be used, and a polyisocyanate having an NCO% of 20 to 25% by weight is more preferable. If it is less than 15% by weight, the strength of the coating may be insufficient, and if it exceeds 25% by weight, there will be less polyisocyanate with an isocyanurate structure, and conversely, polyisocyanate that is not trimerized, such as diisocyanate. As a result, the strength of the coating film is similarly insufficient.

In addition, the viscosity of the polyisocyanate used in the present invention is preferably 500 to 3500 mPa・s/25°C. If it is less than 500 mPa・s, the strength of the coating may be insufficient, and if it exceeds 3500 mPa・s, the underlying concrete surface The workability when applying the product may be reduced. The amount of polyisocyanate used in the present invention is 20 to 40 parts by weight per 100 parts by weight of the conductive water-based polymer cement composition. If it is less than 20 parts by weight, the strength of the coating may be insufficient, and if it exceeds 40 parts by weight, it will harden. The time may be shortened and the workability may be insufficient.

<Carbon fiber>
Carbon fibers are classified into PAN (polyacrylonitrile) type, which uses acrylic fiber, and PITCH type, which uses pitch obtained from by-products such as petroleum and coal tar as a raw material.PITCH type is more isotropic due to the difference in raw materials. Although they are classified into pitch-based and mesophase pitch-based, one or a mixture of two or more of them can be used in the present invention. The carbon fiber used in the present invention preferably has a length of 0.01 to 2.5 mm and a diameter of 5 to 20 μm. If the length is less than 0.01 mm, the conductivity may decrease; If the diameter is less than 5 μm, the conductivity may decrease, and if it exceeds 20 μm, the workability using a metal trowel may decrease. .

The amount of carbon fiber used in the present invention is preferably 0.05 to 0.2 parts by weight based on 100 parts by weight of the conductive aqueous polymer cement composition, and if it is less than 0.05 parts by weight, the conductivity will be insufficient. If the amount exceeds 0.2 parts by weight, the viscosity of the composition may increase and the fluidity (workability) may decrease, and the smoothness of the coating film may be impaired due to lumps formed due to entanglement of carbon fibers.

In order for the carbon fibers to form a conductive path within the coating film, contact between the carbon fibers is essential. PAN-based carbon fibers have a small and uniform fiber diameter, are straight with no curvature, and are suitable for securing the distance of a conductive path, but because of their shape, the probability of contact with other carbon fibers is low in a dispersed state. Therefore, if you try to increase the amount of fiber blended to ensure the amount of contact, it may significantly reduce the fluidity of the composition or cause tangles, which may have a negative impact on workability and the finish of the coating film. be. On the other hand, PITCH carbon fibers have a large fiber diameter and a curved shape, which is disadvantageous for forming conductive paths, but compared to PITCH carbon fibers, they are less likely to get entangled in a dispersed state and have less decrease in fluidity. It can be contained in a large amount. In Patent Document 1, by using these in combination, PITCH-based carbon fibers play the role of anchor points in the conductive path formed by PAN-based carbon fibers, creating a continuous three-dimensional path with few break points. It has been shown that it becomes easier to form fibers, and that conductivity can be ensured with a smaller amount of fibers. This method is particularly effective when the proportion of carbon fibers in the cured coating film of the composition is small; in other words, it is difficult for the carbon fibers to form conductive paths due to the large proportion of aggregate, etc., which is an insulator. Useful in some cases. Therefore, as in the conductive water-based polymer cement composition of the present invention, when the amount of insulating aggregate etc. is not large and it is not difficult for the carbon fibers to form a conductive path, PAN-based carbon fibers, It is sufficient to contain either PITCH-based carbon fiber or PITCH-based carbon fiber. Of course, even in such a case, the use of a mixture of PAN-based carbon fiber and PITCH-based carbon fiber is not prohibited.

In addition, blending carbon fibers into the conductive water-based polymer cement composition of the present invention not only imparts conductivity but also reinforces the coating film formed by the conductive water-based polymer cement composition, and in particular, , is effective against the occurrence of microcracks over time (microcrack resistance).

It can be considered that the fine crack resistance is more effective when a large number of carbon fibers are uniformly dispersed in the coating film, but if a relatively large amount is blended as described above, PAN-based carbon Fibers can get tangled, which can have a negative effect on the finish of the paint film, but PITCH carbon fibers are less likely to get tangled, so PITCH carbon fibers are suitable in terms of micro-crack resistance and carbon fiber properties. Infer. Therefore, when using PAN-based carbon fibers and PITCH-based carbon fibers, it is possible if the micro-crack resistance, conductivity, and surface finish of the coating film are not impaired. Preference is given to using fibers.

<Organometallic catalyst>
The organometallic catalyst used in the present invention is blended to accelerate the curing of the conductive water-based polymer cement composition, and includes, for example, tin octylate, tin oleate, tin laurate, dibutyltin diacetate, dibutyltin diacetyl Organometallic catalysts such as acetonate, dibutyltin dilaurate, dibutyltin dichloride, lead octylate, lead naphthenate, bismuth octylate, etc. can be used. Among these curing catalysts, organic tin compounds are more preferred. Among these curing catalysts, dibutyltin diacetylacetonate, dibutyltin diacetate, dibutyltin dilaurate, and dibutyltin dichloride are more preferred from the viewpoint of catalytic effect. The amount of the organometallic catalyst is preferably 0.005 to 0.05 parts by weight based on 100 parts by weight of the conductive aqueous polymer cement composition, and if it is less than 0.005 parts by weight, the strength of the coating film will be insufficient. If it exceeds 0.05 part by weight, curing may be rapid and the application workability with a trowel etc. may be poor.

<Hydraulic cement>
As the hydraulic cement used in the present invention, it is preferable to use mainly white Portland cement so that a specific color tone can be imparted, and in addition, ordinary Portland cement, alumina cement, blast furnace cement, early strength Portland cement, etc. are used in combination. I can do it. The amount of hydraulic cement to be blended is preferably 10 to 20 parts by weight based on 100 parts by weight of the conductive water-based polymer cement composition.If it is less than 10 parts by weight, the strength of the coating film will decrease, and if it exceeds 20 parts by weight, the conductive water-based polymer cement Application workability when applying the composition with a trowel etc. is reduced.

<Aggregate>
As the aggregate used in the present invention, silica sand, calcium carbonate, aluminum hydroxide, etc. having a particle size of 50 μm to 700 μm can be used. If the particle size is less than 50 μm, the viscosity of the conductive water-based polymer cement composition will increase and the application workability will be reduced. Smoothness may be poor.

The amount of aggregate blended is preferably 20 to 40 parts by weight based on 100 parts by weight of the conductive water-based polymer cement composition. If it is less than 20 parts by weight, the smoothness of the coating may be poor, and if it exceeds 40 parts by weight, it may have poor impact resistance. There may be a decrease in sexual performance.

In addition to the above, slaked lime is preferably added to the conductive water-based polymer cement composition of the present invention. The slaked lime absorbs carbon dioxide gas generated by the urea reaction between polyisocyanate and water, and when the composition is applied and cured, the carbon dioxide gas generated concentrates in specific areas and pushes up the paint film, causing blistering. It has the effect of suppressing the occurrence of

When applying the conductive primer used in the present invention, a roller or a metal trowel can be selected and applied in consideration of the viscosity and the amount of application. Furthermore, the conductive water-based polymer cement composition of the present invention can be applied by using a metal trowel at a coating amount of 2.5 to 4.5 kg/m ² . This is preferable in terms of the finish of the coating film surface of the composition and the electrical conductivity.

When forming the conductive coated floor structure of the present invention, before applying a conductive primer to form a conductive primer layer, a non-conductive epoxy resin coated flooring material is applied on the subfloor concrete. be able to. By applying the epoxy resin-based coating floor material, a dense and strong floor structure can be formed on the subfloor concrete, and as a result, moisture rising from the subfloor concrete can be absorbed by the conductive coating of the present invention. It is possible to prevent permeation to the back surface of the floor structure and suppress problems such as peeling and blistering. Commercially available epoxy resin-based flooring materials include primer JE-70 (bisphenol A epoxy resin, modified aliphatic polyamine, solid content: 40%, manufactured by Aica Kogyo Co., Ltd., trade name) and epoxy resin-based flooring materials. A flooring material such as JE-20G (bisphenol A epoxy resin, modified aliphatic polyamine, solid content: 100%, manufactured by Aica Kogyo Co., Ltd., trade name) can be used.

This will be specifically explained below using Examples and Comparative Examples.

<Examples and comparative examples>
Regarding the conductive coated floor structures of Examples and Comparative Examples, Table 1 shows the layer structure, coating amount, and film thickness of the formed conductive coated floor structures. In addition, Table 2 shows the formulations and NCO/OH molar ratios of the conductive water-based polymer cement compositions A to I that form the conductive painted floor structures of Examples and Comparative Examples (Tables 1 and 2 show the compositions (abbreviated as A to I).
conductive primer
As a conductive primer, use Jolie Ace JE-2560 (bisphenol A type epoxy resin, modified polyamide amine, solid content: 40%, artificial graphite: 18%, manufactured by Aica Kogyo Co., Ltd., product name), which is a conductive primer made of solvent-based epoxy resin. , Joliece JA-60, a water-based epoxy resin conductive primer (bisphenol A epoxy resin, modified polyamide amine, solid content: 60%, water: 40%, artificial graphite: 18%, manufactured by Aica Kogyo Co., Ltd., product name ), and Joliece JJ-565, a water-based hard urethane resin conductive primer (polyol emulsion, 4,4'-diphenylmethane diisocyanate, cement aggregate, solid content: 95%, water: 5%, isotropic PITCH system) Conductive coated floor structures of Examples and Comparative Examples were formed using carbon fiber: 0.3%, PAN-based carbon fiber: 0.1%, manufactured by Aica Kogyo Co., Ltd., trade name).
Conductive water-based polymer cement composition
As the water-dispersed polyol, water-dispersed polyol A (water content: 25 to 30% by weight), which is composed of a castor oil-based trifunctional polyol and has a hydroxyl equivalent of 280 to 560, and castor oil based on 100 parts by weight of the castor oil-based trifunctional polyol are used. Water-dispersed polyol B (water content: 25-30% by weight) containing 14 to 20 parts by weight of an oil-based bifunctional polyol and having a total hydroxyl equivalent of 200 to 500, and a castor oil-modified trifunctional polyol having a hydroxyl equivalent of 350. 35 to 40 parts by weight of a polyol, 5 to 10 parts by weight of a tetrafunctional polyol having a bisphenol A skeleton with a hydroxyl equivalent of 360, and 20 to 20 parts of a sulfonic acid ester compound (Mezamol; trade name, manufactured by Bayer AG) as a diluent. 25 parts by weight and 30 parts by weight of water (ion-exchanged water) for a total of 100 parts by weight, using water-dispersed polyol C with a hydroxyl equivalent of 500 to 800, and as a polyisocyanate, hexamethylene diisocyanurate (viscosity 2400 mPa). s/25°C, NCO%: 22% by weight, polyisocyanate content 99% by weight or more) and polyisocyanate B, which is 4,4′-diphenylmethane diisocyanate (viscosity 170mPa/25°C, NCO%: 30.5% by weight, polyisocyanate content of 99% by weight or more), Neostan U220H (dibutyltin diacetylacetonate) was used as the organometallic catalyst, and the carbon fiber had a length of 1.55 mm and a diameter of 13 μm. Isotropic PITCH-based carbon fiber A, PAN-based carbon fiber B with a length of 0.1 mm and diameter of 7 μm, and PAN-based carbon fiber C with a length of 3.0 mm and a diameter of 7 μm were used. As aggregates, aggregate A is silica sand with a particle size of 50 to 250 μm, aggregate B is silica sand with a particle size of 75 to 425 μm, and aggregate C is silica sand with a particle size of 45 μm to 300 μm. Conductive water-based hard polymer cement compositions A to H shown in Table 2 were prepared using white Portland cement (manufactured by Taiheiyo Cement Co., Ltd.) as the hard cement, and these were used to prepare conductive coated floors of Examples and Comparative Examples. A structure was formed.

<Evaluation items and evaluation methods>

<Coating film surface smoothness>
Conductive primers JE-2560 and JA-60 were applied with a roller to the surface of a JISA5371 300 mm x 300 mm x 60 mm thick dry concrete slab (5% or less using a Kett moisture meter HI-520 concrete range) at 23°C. After applying the specified amount of JJ-565 with a metal trowel and curing for 15 hours, apply the specified amount of conductive water-based polymer cement composition with a metal trowel and curing for 7 days. By doing so, conductive coated floor structures of Examples and Comparative Examples were formed. Visually observe the surface condition of the paint film, and if it has a smooth finish, mark it as 0.There are no lumps of carbon fiber entangled or carbon fibers that are pushed up when air bubbles contained in the material move to the paint film surface. Cases where the finish was not smooth due to protrusions, etc., and cases where the finish was not smooth due to the high viscosity of the composition and poor fluidity (workability) were evaluated as ×.

<Antistatic property>
Apply conductive primers JE-2560 and JA-60 using a roller and JJ-565 using a metal trowel to the surface of a flexible board (900 x 900 mm, thickness 7 mm) specified by JISA5430 at 23°C. After applying a certain amount and curing for 15 hours, the conductive coated floor structures of Examples and Comparative Examples were prepared by applying a predetermined amount of conductive water-based polymer cement composition with a metal trowel and curing for 7 days. Formed. In accordance with NFPA-56AS Standard for the Use of Inhalation Anesthetics, two prescribed electrodes weighing 2.27 kg (5 lbs) are placed on top of a conductive painted floor structure at a distance of 91.4 cm (3 ft). The surface resistance value was measured at a voltage of 500V. Those with a value of more than 0.01 MΩ and less than 100 MΩ were evaluated as having conductivity (antistatic properties), and were evaluated as ○, and those other than that were evaluated as ×.

<Impact resistance>
Conductive primers JE-2560 and JA-60 were applied with a roller to the surface of a JISA5371 300 mm x 300 mm x 60 mm thick dry concrete slab (5% or less using a Kett moisture meter HI-520 concrete range) at 23°C. After applying the specified amount of JJ-565 with a metal trowel and curing for 15 hours, apply the specified amount of conductive water-based polymer cement composition with a metal trowel and curing for 7 days. By doing so, conductive coated floor structures of Examples and Comparative Examples were formed. A steel ball weighing 1 kg was dropped 20 times from a height of 1 m onto the center of the conductive coated floor structure, and those with no abnormalities such as cracks or peeling were marked as ○, and those with no abnormalities such as cracks or peeling were dropped 60 times. Those with no defects were evaluated as ◎, and those in which abnormalities such as cracking and peeling occurred when the iron ball was dropped less than 20 times were evaluated as ×.

<Micro-crack resistance>
At 23℃, cut a JISA5371 300mm x 300mm x 60mm thick dry concrete flat plate (5% or less using a Kett moisture meter HI-520 concrete range) into quarters to make 150mm x 150mm x 60mm thick. Using a test plate, the surface of the test plate was sufficiently roughened with #80 sandpaper to remove the brittle layer, and conductive primers JE-2560 and JA-60 were applied with a roller, and JJ-565 was applied with a metal trowel. After applying a predetermined amount of the conductive water-based polymer cement composition with a metal trowel and curing it for 15 hours, the conductive water-based polymer cement composition was applied with a trowel and cured for 7 days. A conductive coated floor structure was formed. After that, 400 cycles were repeated with 95°C hot water flowing down for 5 minutes and then 20°C cold water flowing down for 10 minutes in the center of the conductive coated floor structure, and no microcracks were generated on the surface. Those with fine cracks were evaluated as ×.

<Adhesion strength>
Conductive primers JE-2560 and JA-60 were applied with a roller to the surface of a JISA5371 300 mm x 300 mm x 60 mm thick dry concrete slab (5% or less using a Kett moisture meter HI-520 concrete range) at 23°C. After applying the specified amount of JJ-565 with a metal trowel and curing for 15 hours, apply the specified amount of conductive water-based polymer cement composition with a metal trowel and curing for 7 days. By doing so, conductive coated floor structures of Examples and Comparative Examples were formed. The adhesion strength (N/mm ² ) between the conductive coated floor structure and the concrete flat plate in a 40×40 mm portion was measured using a Kenken type adhesion tester. The state of failure was evaluated as ○ if the base concrete was 100% cohesive failure, and otherwise as ×.

<Peeling resistance>
The amount of shrinkage strain L when the conductive coated floor structures of Examples and Comparative Examples were formed into strips of 160 mm in length x 10 mm in width at 23°C, each cured for 7 days, and then heated and cured at 50°C for 14 days. (mm). Next, it is pulled in the longitudinal direction at a speed of 1 mm/min, and the tensile elastic modulus E (N/mm ² ) is measured. From the amount of shrinkage strain L (mm) and the length L ₀ (mm) of the specimen after curing for 7 days at 23°C, calculate the shrinkage stress (N/mm ² ) per unit cross-sectional area of the coating film using the following formula (1). Then, the coating film shrinkage force T (N/mm) per unit width of the coating film was determined by multiplying the film thickness of the conductive coated floor structures of Examples and Comparative Examples shown in Table 1.
Shrinkage stress (N/mm ² )=E (L/L ₀ )...(1)
Here, the paint film shrinkage force T (N/mm) is empirically thought to act in the direction of peeling off the paint film, so the paint film shrinkage force at this time is modeled and empirically shown in Figure 1. It is assumed that the paint film is pulled at a shallow angle of about 5 degrees to cause the paint film to peel off, and the vertical force Tv (N/mm) per unit width (mm) of the paint film is calculated using the following formula (2). ).
Vertical force Tv (N/mm) = sin5°×T...(2)
This vertical force Tv (N/mm) per unit width (1 mm) is determined experimentally and empirically because the film thickness is as thick as 2.0 to 3.5 mm. ² , the vertical force acts to pull the coating film perpendicularly to the unit surface area (1 mm ² ) of the underlying concrete, and this is defined as the vertical stress Tv ₂ (N/mm ² ). .

On top of that, first of all, Figure 2 shows the relationship between the surface tensile strength of the base concrete and the laitance residual rate at a water/cement ratio of 60% (Effect of the base concrete on the occurrence of blistering in plastered floors, Architectural Institute of Japan See Systematic Papers, No. 493, 1-7, March 1997, Table 1 and Figure 12 (air-dried state). Only the substrate cohesive failure is extracted from Figure-12 (air-dried state) and illustrated. Comparing the vertical stress Tv ₂ (N/mm ² ) with the normal stress Tv 2 (N/mm 2 ), even if 100% of the laitance remained in the concrete base, the surface tensile strength of the base would be 0.7 N/mm ² (Normally, the base concrete specification is that the base concrete from which all laitance has been removed is suitable for the construction of coated flooring materials), the vertical stress Tv ₂ (N/mm ² ) is lower than the 0.7 N/mm ² . If it is small, it is considered that the coating film will not peel off from the base concrete under the action of the shrinkage force of the coating film alone, and therefore it is rated as ◎. If the vertical stress Tv ₂ (N/mm ² ) is larger than the surface tensile strength 0.7 N/mm ² (residual laitance rate 100%) of the base concrete, the paint film will be damaged by the shrinkage force of the base concrete only. It was rated as × because the concrete surface could be destroyed and peeled off.

In addition, the 2012 edition of the Painted Floor Handbook (published March 1, 2012, supervised by Yutaka Yokoyama, edited by the Japan Painted Floor Industry Association, published and sold by Kobunsha) includes information on newly installed concrete as the base for the painted floor.・Since the surface (tensile) strength as one of the qualities of mortar and repair base is defined as 1.5 N/mm ² , this 1.5 N/mm ² and the vertical stress Tv ₂ (N/mm ² ), if the vertical stress Tv ₂ (N/mm ² ) is smaller than 1.5 N/mm ² , the coating film will not peel off from the underlying concrete under the action of the shrinkage force of the coating film alone. I thought there was no such thing and rated it as 〇. If the vertical stress Tv ₂ (N/mm ² ) is greater than the surface (tensile) strength 1.5 N/mm ² , the coating will break the surface of the underlying concrete and peel off due to the shrinkage force of the coating alone. It was rated as × because there were some cases.

If at least the standard value of 1.5N/ ^mm2 in the coating floor handbook is 〇 out of the above two judgments, it is judged that the peeling resistance is good, and if both are ×, then the If a groove with a depth of 3 to 7 mm and a width of 3 to 7 mm is provided at the edge of the subfloor concrete, as in the case of It is determined that joints with a width of 3 to 7 mm should be provided, and the composition must be applied to the subfloor concrete while filling the grooves and the joints.

<Yellowing resistance>
Apply conductive primers JE-2560 and JA-60 with a roller and JJ-565 with a metal trowel to the specified amount on the surface of a flexible board (900 x 900 mm, thickness 7 mm) specified by JISA5430 at 23°C. After applying and curing for 15 hours, a predetermined amount of conductive water-based polymer cement composition was applied with a metal trowel and cured for 7 days to form conductive coated floor structures of Examples and Comparative Examples. did. Each was irradiated with black light (germicidal lamp, peak wavelength 256 nm, 31 μW/cm ² ) from a height of 50 cm for 300 hours, and the color difference (ΔE) before and after irradiation was measured using a colorimeter (CM-2600d, Konica Minolta Sensing Co., Ltd.) (manufactured by). Those with ΔE of 1.0 or less were evaluated as ○, and those with ΔE of more than 1.0 were evaluated as ×.

<Evaluation results>
The evaluation results are shown in Table 3.

Claims (6)

A conductive primer layer formed on the surface of the subfloor concrete, and a conductive primer layer formed by applying a conductive water-based polymer cement composition on the conductive primer layer at a coating amount of 2.5 to 4.5 kg/ ^m2 . A conductive coating floor structure comprising: a water-based polymer cement composition layer;
The conductive water-based polymer cement composition comprises a water-dispersed polyol, a polyisocyanate, an organometallic catalyst, carbon fibers, hydraulic cement, and aggregate,
The water-dispersed polyol contains water and at least a castor oil-based trifunctional polyol, and has a hydroxyl equivalent of 200 to 800, and the water-dispersed polyol is in an amount of 10 to 30 parts by weight based on 100 parts by weight of the conductive water-based polymer cement composition.
The polyisocyanate consists of an aliphatic isocyanurate, and the polyisocyanate is 20 to 40 parts by weight in 100 parts by weight of the conductive aqueous polymer cement composition;
The carbon fibers have a length of 0.01 to 2.5 mm and a diameter of 5 to 20 μm, and the carbon fibers are 0.05 to 0.2 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition.
The hydraulic cement is 10 to 20 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition,
The aggregate is 20 to 40 parts by weight per 100 parts by weight of the conductive water-based polymer cement composition.
A conductive coated floor structure characterized by: A conductive primer layer formed on the surface of the subfloor concrete, and a conductive primer layer formed by applying a conductive water-based polymer cement composition on the conductive primer layer at a coating amount of 2.5 to 4.5 kg/ ^m2 . A conductive coating floor structure comprising: a water-based polymer cement composition layer;
The conductive water-based polymer cement composition comprises a water-dispersed polyol, a polyisocyanate, an organometallic catalyst, carbon fibers, hydraulic cement, and aggregate,
The water-dispersed polyol contains water, a castor oil-based trifunctional polyol, and a castor oil-based bifunctional polyol, and has a hydroxyl equivalent of 200 to 600, and the water-dispersed polyol contains 10 to 30 parts by weight of the conductive water-based polymer cement composition. parts by weight,
The castor oil-based bifunctional polyol is more than 0 parts by weight and not more than 40 parts by weight in 100 parts by weight of the water-dispersed polyol,
The polyisocyanate consists of an aliphatic isocyanurate, and the polyisocyanate is 20 to 40 parts by weight in 100 parts by weight of the conductive aqueous polymer cement composition;
The carbon fibers have a length of 0.01 to 2.5 mm and a diameter of 5 to 20 μm, and the carbon fibers are 0.05 to 0.2 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition.
The hydraulic cement is 10 to 20 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition,
The aggregate is 20 to 40 parts by weight per 100 parts by weight of the conductive water-based polymer cement composition.
A conductive coated floor structure characterized by: A conductive primer layer formed on the surface of the subfloor concrete, and a conductive primer layer formed by applying a conductive water-based polymer cement composition on the conductive primer layer at a coating amount of 2.5 to 4.5 kg/ ^m2 . A conductive coating floor structure comprising: a water-based polymer cement composition layer;
The conductive water-based polymer cement composition comprises a water-dispersed polyol, a polyisocyanate, an organometallic catalyst, carbon fibers, hydraulic cement, and aggregate,
The water-dispersed polyol contains water, a castor oil-based trifunctional polyol, and a tetrafunctional polyol having a bisphenol A skeleton, and has a hydroxyl equivalent of 500 to 800. ~30 parts by weight,
The castor oil-based trifunctional polyol is more than 30 parts by weight and not more than 50 parts by weight in 100 parts by weight of the water-dispersed polyol,
The polyisocyanate consists of an aliphatic isocyanurate, and the polyisocyanate is 20 to 40 parts by weight in 100 parts by weight of the conductive aqueous polymer cement composition;
The carbon fibers have a length of 0.01 to 2.5 mm and a diameter of 5 to 20 μm, and the carbon fibers are 0.05 to 0.2 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition.
The hydraulic cement is 10 to 20 parts by weight in 100 parts by weight of the conductive water-based polymer cement composition,
The aggregate is 20 to 40 parts by weight per 100 parts by weight of the conductive water-based polymer cement composition.
A conductive coated floor structure characterized by: 4. The conductive coated floor structure according to claim 1, wherein the polyisocyanate is hexamethylene diisocyanurate. Any one of claims 1 to 4, wherein the electrical resistance of the coating film surface is more than 0.01 MΩ and less than 100 MΩ under the condition of an applied voltage of 500 V in the NFPA (National Fire Protection Association) method. The conductive coated floor structure described. After applying a conductive primer to the surface of the subfloor concrete to form a conductive primer layer, a conductive water-based polymer cement composition is applied on the conductive primer layer at a coating amount of 2.5 to 4.5 kg/ ^m2 . A conductive plastered floor structure, characterized in that the conductive plastered floor structure according to any one of claims 1 to 5 is formed by applying a conductive water-based polymer cement composition layer. Formation method.