KR102338424B1 - Eco-friendly composition for flooring comprising grephene oxide and its construction method - Google Patents

Abstract

The present invention relates to a composition of a water-based and oil-based combination eco-friendly flooring material containing a graphene oxide and a construction method of a flooring material using the same. Specifically, the present invention relates to the water-based and oil-based combination eco-friendly flooring material containing the graphene oxide that contains a solvent-free epoxy resin and the graphene oxide to which a polar group is assigned, thereby having excellent performance in water resistance, tensile strength, elongation percentage, impact resistance, abrasion resistance, flame retardancy, and chemical resistance; and the construction method thereof.

Description

Composition of water-based and oil-based combination eco-friendly flooring material containing graphene oxide and its construction method

The present invention relates to a composition for a water-based and oil-based bonding eco-friendly flooring material containing graphene oxide and a method for constructing a flooring material using the same, and in particular, contains a solvent-free epoxy resin and graphene oxide that has been given a polar group, and has water resistance, tensile strength, elongation, and impact resistance. , It relates to a water-based and oil-based combination eco-friendly flooring material containing graphene oxide excellent in abrasion resistance, flame retardancy and chemical resistance, and a construction method thereof.

In general, the durability of reinforced concrete structures is known to be about 100 years, but cracks occur due to drying shrinkage and temperature changes, and the durability is deteriorated due to neutral salt damage, etc. is lowered In addition, when the concrete surface is exposed to the outside for a long time, the aging of concrete is accelerated due to natural aging and external factors. Concrete dust, etc. is generated, causing environmental pollution problems.

Currently, most reinforced concrete structures are constructed with flooring materials suitable for the purpose of the facility in order to secure the durability of the floor surface. In general, a coating film is formed on the surface of the structure to block the concrete surface from contact with aging and deterioration factors. The durability of the concrete floor is ensured.

As a flooring material for securing the durability of the concrete structure floor, a water-soluble and oil-based epoxy-based flooring or a resin mortar-based flooring applied by mixing vegetable oil, isocyanate, and hydraulic powder is widely used.

In relation to the epoxy-based flooring material, Korean Patent Registration No. 10-2019-014623 (title of invention; solvent-free two-component paint composition for antistatic epoxy flooring material, manufacturing method thereof, and antistatic epoxy flooring material) discloses that volatile substances are It is eco-friendly because it is almost non-existent, and the workability is high because it is easy to work indoors, and it is described that it has excellent antistatic properties, abrasion resistance, and durability by using a small amount of conductive material. Vapor (hereinafter referred to as air entrainment) performance is poor, and there is a disadvantage in that the coating film is lifted, swelled, peeled, etc. due to gas, vapor pressure, osmotic pressure, etc. on the floor surface.

In relation to the resin mortar-based flooring material, Korean Patent Laid-Open Patent No. 10-1088748 (Title of the invention; Eco-friendly resin mortar flooring composition with excellent chemical resistance and heat resistance, and flooring using the same, and a method of construction thereof), Korean Patent Laid-Open No. 10-1142944 There are techniques described in the publication No. (Name of the invention; Eco-friendly flooring composition and flooring construction method using the composition). However, the above patents have the disadvantage of poor workability because the pot life is too short because the reactivity of the vegetable oil (perm oil) used as the subject and the isocyanate used as the curing agent is too fast.

Republic of Korea Patent No. 10-1142944 Republic of Korea Patent No. 10-1088748 Republic of Korea Patent Publication No. 10-2019-0140623

The problem to be solved in the present invention is to prevent swelling and peeling of the coating film due to moisture, gas, and vapor pressure (osmotic pressure), and to ensure convenient workability by securing sufficient pot life for flooring construction and aging and aging due to deterioration of concrete structures It is to provide a new flooring material that can maximize the durability of the structure by preventing environmental pollution caused by crushing.

Another problem to be solved in the present invention is to prevent swelling and peeling of the coating film due to moisture, gas, and vapor pressure (osmotic pressure), and to secure sufficient pot life for flooring construction to realize convenient workability and aging due to deterioration of concrete structures And to provide a new flooring construction method that can maximize the durability of the structure by preventing environmental pollution due to crushing.

Another problem to be solved in the present invention is to prevent swelling and peeling of the coating film due to moisture, gas, and vapor pressure (osmotic pressure), and to secure sufficient pot life for flooring construction to realize convenient workability and to prevent deterioration of concrete structures. It is to provide a new floor structure that can maximize the durability of the structure by preventing environmental pollution due to aging and crushing.

In order to solve the above problems,

a main agent comprising a solvent-free oil-based epoxy resin having a polar group, an amphoteric solvent, graphene oxide, and an antifoaming agent;

A curing agent comprising a water-soluble epoxy curing agent and water; and

To provide an eco-friendly flooring material made of hydraulic powder including cement, silica, colored pigment, filler, fluidizing agent and defoaming agent.

In the present invention, the eco-friendly flooring material includes a solvent-free oil-based epoxy resin having a polar group, an amphoteric solvent, graphene oxide, and a subject including an antifoaming agent; A curing agent comprising a water-soluble epoxy curing agent and water; And cement, silica, coloring pigment, filler, fluidizing agent and a hydraulic powder containing an antifoaming agent is applied to the concrete structure to form an aqueous and oil-based combination eco-friendly flooring containing graphene oxide that performs a flooring function.

Although not limited in theory, the flooring material is prepared by mixing a hydraulic powder with excellent air entrainment properties in a coating solution combining a solvent-free oil-based epoxy resin and a water-based epoxy curing agent to which a polar group has been imparted. It maximizes the durability of the structure by preventing environmental pollution caused by aging and crushing due to deterioration of concrete structures and realization of convenient workability by securing sufficient pot life for flooring construction.

In the present invention, the mixing ratio of the main component and the curing agent component may be mixed in a 1:1 equivalent ratio, and the hydraulic powder component may be mixed in 1:2.2 to 2.5 (weight ratio) for the main agent and curing agent mixture.

In the present invention, the subject is based on 100 parts by weight of the main agent, 93 to 97 parts by weight of a solvent-free oil-based epoxy resin having a polar group, 2 to 6 parts by weight of an amphoteric solvent, 0.1 to 0.5 parts by weight of graphene oxide, and 0.5 to 1 antifoaming agent It may contain parts by weight.

In the practice of the present invention, the polar group may be an alkoxy group, a hydroxyl group, or a silane group, and the silane group may be a silane group represented by the following formula (1).

(1)

(One)

Here, R1, R2, and R3 are independently a linear or branched C1-C7 alkyl group.

In the practice of the present invention, the polar group may be a trimethoxysilane group, a triethoxysilane group, or a tripropoxysilane group.

In one embodiment of the present invention, the silane group is a C1 to C20 alkyl group, a C3 to C8 cycloalkyl group, a C1 to C20 alkyl group substituted with a C3 to C8 cycloalkyl, a C2 to C20 alkenyl group, a C2 to C20 alkynyl group, a C6 to C20 It may be formed at the end of one or more chains selected from an aryl group.

In the present invention, the curing agent may include 50 to 60 parts by weight of a water-soluble epoxy curing agent, and 40 to 50 parts by weight of water based on 100 parts by weight of the curing agent.

In the present invention, the hydraulic powder is 20 to 30 parts by weight of cement, 50 to 65 parts by weight of silica, 1.5 to 5 parts by weight of a color pigment, 10 to 15 parts by weight of a filler, 0.8 to 1.5 parts by weight of a fluidizing agent with respect to 100 parts by weight of the hydraulic powder and 0.2 to 0.8 parts by weight of an antifoaming agent.

In the present invention, the construction method of the eco-friendly flooring includes a surface treatment step of surface-treating a concrete structure; A scraping operation step of applying the flooring composition to the surface-treated structure to a thickness of 1 mm or less; and applying the composition of the flooring material to a thickness of 2 to 8 mm on the structure subjected to the scraping operation, curing the composition, and then finishing the construction step.

As described above, the present invention includes at least the following effects.

First, by the water-based and oil-based combination eco-friendly flooring composition containing graphene oxide of the present invention, the excellent air entrainment performance of the dry coating film prevents the coating film from lifting and peeling due to moisture, gas, vapor pressure, etc., thereby securing the durability of the concrete structure. .

Second, the eco-friendly flooring composition of the present invention not only secures convenient workability by securing sufficient pot life for coating work, but also has excellent water resistance, tensile strength, elongation, abrasion resistance, flame retardancy, and chemical resistance.

Third, by improving the durability and prevention of environmental pollution due to aging of the concrete by the flooring construction method of the concrete structure according to the present invention, it is possible to obtain the effect of reducing the cost due to the maintenance and repair of the concrete structure. .

Therefore, the present invention solves the problems of poor air entrainment and short pot life, which are the disadvantages of oil-based and water-soluble epoxy-based flooring materials and resin mortar-based flooring materials, and completely prevents problems such as swelling and peeling of the cured coating film. Prevention of environmental pollution due to aging and further maximizing durability.

1 is a flowchart schematically illustrating a process of a flooring construction method using an eco-friendly flooring composition according to the present invention.

Hereinafter, the present invention will be described in detail through examples. The following examples illustrate the present invention and are not intended to limit the present invention.

As shown in FIG. 1, the method for constructing a flooring material for a concrete structure of the present invention includes: a surface treatment step of removing the deteriorated portion of the surface of the concrete structure, the old coating film, the latency and foreign substances; A scraping operation step of applying the flooring composition of the present invention to the surface-treated structure to a thickness of 1 mm or less; and applying the flooring composition of the present invention to the structure subjected to the scraping operation to a thickness of 2 to 8 mm, and then curing and then finishing the construction step.

The cross-section of the structure constructed through the steps according to the present invention is sequentially laminated with a concrete floor, a scraping primer layer that works with the flooring composition of the present invention to 1 mm or less, and a flooring layer coated with the flooring composition of the present invention by 2 to 8 mm. have a structured structure.

Hereinafter, an eco-friendly flooring construction method according to the present invention will be described in each step.

(1) Surface treatment step

The first step of the eco-friendly flooring construction method is a surface treatment step to remove the deteriorated parts, old coating film, latency, foreign substances, etc. on the surface of the concrete structure and improve adhesion. The surface treatment method is not particularly limited, but for both new construction and repair, use a power tool such as a grinder, grinder, or planer to thoroughly clean the construction site after completely removing the deteriorated area, old coating film, latency, foreign matter, etc.

(2) Scraping work step

When the surface treatment step is completed as in (1) above, a step of scraping the surface-treated structure with the flooring composition of the present invention is performed.

The scraping operation is to prevent paint defects (bubbles, pinholes, etc.) that may occur during subsequent painting operations. do.

The number of times of construction can be applied twice depending on the painting environment, but it is preferable to install it once considering the construction period and labor cost. When the thickness of the coating film is 0.7 mm or less, the effect of preventing workability and air bubbles and pinholes decreases, and when the thickness of the coating film is 1 mm or more, the amount of follow-up work among the limited total amount decreases, which may lead to poor workability during subsequent work.

(3) This construction stage

When the scraping operation is completed as in step (2), a step of applying a water-based and oil-based combination eco-friendly flooring material to the structure on which the scraping operation is completed is performed.

The water-based and oil-based combination eco-friendly flooring applied to the structure prevents problems such as damage to the floor due to concrete deterioration and environmental pollution due to dust generation, and the number and thickness of application are not particularly limited, but preferably 1 A dry film thickness of about 2 to 8 mm is suitable for ash.

The number of times of painting can be applied twice depending on the painting environment, but it is preferable to apply once in consideration of the construction period and labor costs. When the coating film thickness is 2 mm or less, workability (spreading properties), tensile strength, impact resistance, etc. fall, and the function as a flooring material is deteriorated.

Hereinafter, a graphene-containing water-based and oil-based bonding eco-friendly flooring material according to the present invention will be described.

The eco-friendly flooring material for protecting the concrete surface used in the construction method of the present invention is excellent in the effect of preventing aging and damage to the structure due to the deterioration of the concrete structure, and improving the durability of the concrete to prevent environmental pollution due to dust and the maintenance and repair of the concrete structure. The effect of reducing costs can be obtained, and the solvent-free oil-based epoxy resin used in the present invention has a polar group, so it has excellent compatibility with a water-soluble epoxy curing agent. Unlike eco-friendly flooring materials using vegetable oil and isocyanate, the pot life It is long and convenient to work. In addition, by using a small amount of graphene oxide to improve tensile strength and elongation, the function as a flooring material was strengthened.

The eco-friendly flooring material includes (A) a main component, (B) a curing agent component, and (C) a hydraulic powder component, and (A) the main component is a solvent-free oil-based epoxy resin having a polar group based on 100 parts by weight of the total main component 93 to 97 parts by weight, 2 to 6 parts by weight of an amphoteric solvent, 0.1 to 0.5 parts by weight of graphene oxide, 0.5 to 1 parts by weight of an antifoaming agent.

The solvent-free oil-based epoxy resin having the polar group was stirred by adding a bisphenol A-type epoxy resin and isocyanate silane, and then a reaction catalyst DBTDL (Di-N-BUTYLTIN DILAURATE) was added to maintain the reaction at 80 to 85° C. for 5 to 6 hours. it has been obtained

The graphene oxide is mixed with 1 g of graphene in 300 ml of a 55% nitric acid solution, stirred at 80 to 85 ° C. at 250 to 500 RPM for 7 to 11 hours, filtered several times with distilled water to remove nitric acid, and dried to form a powder Graphene oxide produced by Graphene (Carbon Nano-material Technoigy Co., LTD., Korea) used here was used with a thickness of 50 to 300 nm, a width of 10 to 30 μm, a surface area of 130 to 180 m ² /g, and an aspect ratio of 100 or less.

The (B) curing agent component is characterized in that it contains 50 to 60 parts by weight of a water-soluble epoxy curing agent and 40 to 50 parts by weight of water based on 100 parts by weight of the total curing agent component.

(C) The hydraulic powder component is based on 100 parts by weight of the total hydraulic powder component, 20 to 30 parts by weight of cement, 50 to 65 parts by weight of silica, 1.5 to 5 parts by weight of a coloring pigment, 10 to 15 parts by weight of a filler, 0.8 to 0.8 to a fluidizing agent 1.5 parts by weight, and 0.2 to 0.8 parts by weight of an antifoaming agent.

(A) After mixing so that the mixing ratio of the main component and (B) curing agent component becomes 1:1 equivalent ratio, stir at high speed for 1 to 2 minutes at RPM 400 or higher with an electric stirrer, and (C) hydraulic powder component 1: 2.2 to 2.5 ( After mixing by weight ratio), use after 2~3 high-speed stirring with an electric stirrer at RPM 400 or higher.

Hereinafter, the composition of the eco-friendly flooring material according to the present invention will be described.

(A) Subject component

The main component of the ceramic coating agent according to the present invention, based on 100 parts by weight of the total main component, 93 to 97 parts by weight of a solvent-free oil-based epoxy resin having a polar group, 0.1 to 0.5 parts by weight of graphene oxide, 2 to 6 parts by weight of an amphoteric solvent characterized by including.

The solvent-free oil-based epoxy resin having a polar group is prepared by adding a bisphenol A-type epoxy resin and an isocyanate silane in an OH equivalent ratio of 1:1 (weight ratio), followed by stirring, and then adding a reaction catalyst at 75 to 85° C. for 5 to 6 hours. It was obtained by holding the reaction.

A specific method for producing a solvent-free epoxy resin having a polar group is 70 to 82 parts by weight of a bisphenol A-type epoxy resin having an equivalent weight of 195 to 215 g/eq in a 5L flask equipped with a thermometer, a condenser, a stirrer, and a temperature rising device, and an isocyanate silane (weight Average molecular weight of about 225) After adding 18 to 30 parts by weight, the temperature was raised to 50° C. while slowly stirring and maintained for 30 minutes, then 0.01 parts by weight of the reaction catalyst was added dropwise, and the temperature was raised to 80° C. to maintain and react for 5 to 6 hours. After the final NCO is 0.01 parts by weight or less to stop the reaction and cooled to 50 ° C. or less to prepare a solvent-free epoxy resin with an epoxy equivalent of 195 to 215 g/eq of a polar group.

Although the description is limited to DBTDL (Di-N-BUTYLTIN DILAURATE) as the reaction catalyst, other bismuth (BISMUTH) may be used alone or in combination.

The solvent-free epoxy resin prepared above has a weight average molecular weight of 410 to 1,700, epoxy-equivalent weight 195 to 215, solid content 98 to 99.99 parts by weight, viscosity (25°C) 800 to 1,600 cps, specific gravity (25°C) 1.1 to 1.2 g/ mL is preferred.

When the weight average molecular weight of the solvent-free epoxy resin having the polar group exceeds 1,700, the viscosity of the resin becomes excessively high, and the miscibility with the water-soluble epoxy curing agent decreases, which may lead to curing failure. problems may arise.

Solvent-free oil-based epoxy resin having such a polar group can improve the hardness, abrasion resistance and mechanical and chemical properties of eco-friendly flooring for concrete surface protection by minimizing the amount of surfactant used. It has the advantage that the curing reaction proceeds smoothly due to excellent compatibility with the aqueous epoxy curing agent, and the content thereof is preferably 93 to 97 parts by weight based on 100 parts by weight of the total main component. If the content is less than 93 parts by weight of the main component, the total solid content of the eco-friendly flooring is lowered and the reactivity is lowered, and cracks may occur in the dry coating film due to excessive shrinkage during curing reaction. If it exceeds 97 parts by weight, the amount of amphoteric solvent used may lead to poor miscibility with water-soluble epoxy curing agents.

The amphoteric solvent added to the main component serves to increase the miscibility of the oil-based main resin and the water-soluble curing agent, and the content thereof is preferably 2 to 6 parts by weight based on 100 parts by weight of the total main component. If the content is less than 2 parts by weight of the main component, the effect of improving the compatibility of the resin and the curing agent is reduced, and if it exceeds 6 parts by weight, the total solid content of the eco-friendly flooring material is lowered and the reactivity is lowered. This can happen. As an example of the amphoteric solvent, one or more of ethylene glycol, carbitol (Diethylene Glycol Mnoethyl Ether), and TEG (tetraethylene glycol) may be used.

Graphene oxide added to the main component serves to improve the tensile strength, elongation, abrasion resistance, etc. of the dry coating film of the eco-friendly flooring material, and the content thereof is preferably 0.1 to 0.5 parts by weight based on 100 parts by weight of the total main component. . If the content is less than 0.1 of the main component, the effect of improving tensile strength and elongation is reduced, and when it exceeds 0.5 parts by weight, the spreadability is deteriorated due to the increase in viscosity, and the effect of improving the tensile strength and elongation compared to the amount used is insufficient.

As the graphene, it is preferable to always use graphene oxide having a modified surface. It was confirmed that the elongation decreased as the content of graphene increased as the bonding strength with the epoxy paint was weakened due to insufficient functional groups present on the graphene surface when using graphene whose surface was not modified.

The antifoaming agent added to the main component serves to remove air bubbles generated during the preparation of the main component and suppress or remove the generation of air bubbles during application after mixing the curing agent and hydraulic powder, and the content thereof is 0.5 to 0.5 to 100 parts by weight of the total main component. An amount of 1 part by weight may be preferable in terms of preventing the bubble generation inhibitory effect or the antifoaming agent from floating on the surface of the coating film to contaminate the surface of the dried coating film. As an example of the defoaming agent, one or more of BYK-081, BYK-A535, and BYK-1790 (above BYK, Germany) may be used.

(B) curing agent component

The curing agent component of the eco-friendly flooring material according to the present invention includes 50 to 60 parts by weight of a water-soluble epoxy curing agent and 40 to 50 parts by weight of water, based on 100 parts by weight of the total curing agent component.

The water-soluble epoxy curing agent can be cured at room temperature with the solvent-free oil-based epoxy resin of the main component, and is not particularly limited as long as it is a curing agent with excellent mixing properties, but preferably solid content 45 to 55 wt. It may be preferable to select and use a water-soluble epoxy curing agent having a part, viscosity of 400 to 1,000 cps, and equivalent Wt/H of 220 to 260. For example, the water-soluble epoxy curing agent may use polyamine, modified polyamine, polyetheramine, etc., and one or more of them may be selected and used. The content of the epoxy curing agent may be preferably 50 to 60 parts by weight based on 100 parts by weight of the total curing agent component. If it is out of the above range, the curing of the epoxy resin contained in the main component does not proceed normally, so the mechanical and chemical properties of the eco-friendly flooring material Physical properties may be deteriorated, and problems such as poor drying may occur.

The water smoothly progresses the hydration reaction of the hydraulic powder with excellent air entrainment properties, thereby helping to form pores in the coating film (self-dehydration phenomenon), thereby improving the air entrainment effect of the dry coating film and the hardness of the dry coating film. It serves to improve the spreadability during flooring construction by controlling the viscosity of the flooring material, and the content thereof is preferably 40 to 50 parts by weight based on 100 parts by weight of the total curing agent component. When the content of water is less than 40 parts by weight based on 100 parts by weight of the total curing agent component, the hydration reaction of the hydraulic powder is not completely performed, so the pore formation effect in the dry coating film is deteriorated. It may cause deterioration of the chemical and mechanical performance of the eco-friendly flooring coating.

(C) Hydraulic powder component

The hydraulic powder component of the eco-friendly flooring according to the present invention, based on 100 parts by weight of the total hydraulic powder component, 20 to 30 parts by weight of cement, 50 to 65 parts by weight of silica, 1.5 to 5 parts by weight of a coloring pigment, 10 to 15 parts by weight of a filler, 0.8 to 1.5 parts by weight of a fluidizing agent and 0.2 to 0.8 parts by weight of an antifoaming agent.

In the composition of the hydraulic powder component, cement forms pores in the dry film through hydration reaction with water (self-dehydration phenomenon) to maximize the air entrainment effect of the dry film, so that the swelling and peeling of the film by gas, vapor pressure, osmotic pressure, etc. It is possible to prevent deterioration of concrete due to defective dry coating by preventing the above, and the content thereof is preferably 20 to 30 parts by weight based on 100 parts by weight of the total hydraulic powder component. If the content is less than 20 parts by weight of the hydraulic powder component, the content of cement is low and the formation of pores in the coating film is insufficient, so that the air entrainment of the dry film is deteriorated. The improvement effect is insignificant, and whitening may occur upon contact with water.

As an example of the cement, one or more of Portland cement, white Portland cement, blast furnace cement, silica cement, fly ash cement, alumina cement, etc. can be used, and the cement used in the present invention is made of high-purity calcined alumina and limestone. As a raw material, it is calcined at a high temperature of about 1600° C. and pulverized into powder in a ball mill. Al ₂ O ₃ content is 69.5 to 70.0 parts by weight, CaO content is 28.9 to 29.4 parts by weight, SiO ₂ content is 0.2 to 0.4 weight parts, the Fe ₂ O ₃ content is 0.05 to 0.10 parts by weight, the MgO content is 0.2 to 0.5 parts by weight, the fineness is 4,000 to 5,000 cm2/g, and preferably the Al ₂ O ₃ content is 69.5 parts by weight or more can Among the components of cement, those with Al ₂ O ₃ content of 69.5 parts by weight or less have poor stable reactivity, high curing and dry strength development.

The silica is for improving the volume and fluidity of the eco-friendly flooring material, and the content thereof is preferably 50 to 65 parts by weight based on 100 parts by weight of the hydraulic powder component. When the content of silica is less than 50, the overall viscosity increases and fluidity is lowered, and when the content of silica is more than 65 parts by weight, the amount of cement and filler is limited, resulting in poor strength, hardness, and the like. As for the size of the silica particles, No. 6 to 7 silica sand was used.

The color pigment is used to impart the color of the eco-friendly flooring material, and the content thereof is preferably 1.5 to 5 parts by weight based on 100 parts by weight of the total hydraulic powder component. When the content of the coloring pigment is less than 1.5 parts by weight, the desired color realization is deteriorated, and when it exceeds 5 parts by weight, the effect of improving the color realization is inferior compared to the amount used. As an example of the color pigment, TiO2, iron oxide red, iron oxide sulfur, iron oxide black, oxide green, etc. are used, and one or more of them may be used.

The filler is for volume improvement and viscosity control of the hydraulic powder, and the content thereof is preferably 50 to 60 parts by weight based on 100 parts by weight of the total hydraulic powder component. When the content is less than 50 parts by weight of the hydraulic powder component, the effect of volume formation and viscosity control is deteriorated, and when the content is more than 60 parts by weight, the strength of the dry coating film may decrease due to excessive use of fillers. As an example of the filler, one or more of talc, silica, barium sulfate, talc, etc. may be used, and the filler used in the present invention has an average particle size of 7 to 10 μm, oil absorption 12 to 16 ml/100 g, hardness from 2.5 to 3.5, specific gravity 3.8 to 4.1 g/ml, PH value may be 6 to 8. If the oil absorption amount of the filler is out of the above range, it is difficult to control the viscosity when manufacturing the eco-friendly flooring material, and as water must be added, the reactivity of the eco-friendly flooring material may decrease, and mechanical and chemical properties may be deteriorated.

The fluidizing agent is for improving the fluidity of the hydraulic powder component, and the content thereof is preferably 0.8 to 1.5 parts by weight based on 100 parts by weight of the total hydraulic powder component. When the content of the fluidizing agent is less than 0.8 parts by weight, the fluidity is deteriorated, and when the content of the fluidizing agent is more than 1.5 parts by weight, the layer separation between the powder component and the resin component occurs due to excessive fluidity. As an example of the fluidizing agent, Casein, BNS (β-Naphthalene Sulfonate Formaldehyde), MFS (Melanine-Formaldehyde-Sulfite), PCE (Polycarboxylic Ethers), etc. are used, and one or more of them may be used.

The antifoaming agent is intended to improve the antifoaming properties of air bubbles generated during application of the eco-friendly flooring material, and the content thereof is preferably 0.2 to 0.8 parts by weight based on 100 parts by weight of the total hydraulic powder component. When the content of the antifoaming agent is less than 0.2 parts by weight, the defoaming property is deteriorated, and when it exceeds 0.8 parts by weight, the antifoaming property is insufficient compared to the amount used. As an example of the defoaming agent, one or more of Foamstar CP-700, PB2922 (above ISOCA Chemicals & Additives), AGITAN P841, and AGITAN P833 (above Mumzing) can be selected and used, but it is not necessarily limited thereto .

Hereinafter, an experimental example according to the present invention will be described.

First, the eco-friendly flooring material comprising (A) the main component, (B) the hardener component, and (C) the hydraulic powder component is not diluted and the main component and the hardener component are preferentially mixed and then the hydraulic powder component can be mixed. At this time, (A) main component and (B) curing agent component are used by adjusting the mixing ratio so that the equivalent ratio is 1:1, and the mixed solution and (C) hydraulic powder component are used in a ratio of 1: 2.2 to 2.5 (weight ratio). It can be used by mixing. In order to confirm the effect of the eco-friendly flooring material according to the present invention as an example, the following example was tested.

According to the composition of the main component as shown in Table 1, the amphoteric solvent, graphene, plasticizer, water and antifoaming agent were added to the solvent-free oil-based epoxy resin presented above, and then at room temperature using a high-speed stirrer at room temperature at RPM 1400 or higher for 120 minutes. After stirring, it was softened twice using a three-stage roll mill to prepare the main ingredient.

division Example comparative example Reference example note One 2 3 One 2 3 One main
my
Castle
minute Non-solvent imparting polarity
epoxy resin 95.0 95.0 95.0 - - - 94.0 Equivalent 205 g/eq
(Self-synthetic resin) vegetable oil - - 50 - - castor oil solvent free
epoxy resin - - - - 95.0 95.0 - YD-128 (Kukdo Chemical) amphoteric solvent 4.2 4.0 3.8 4.0 4.0 4.3 2.3 Butyl Carbitol graphene oxide 0.1 0.3 0.5 0.3 0.3 - - Nitric acid solution treatment
(Self-manufactured) graphene - - - - - - 3.0 10% plasticizer - - - 20 - - TXIB water - - - 20 - - antifoam 0.7 0.7 0.7 0.7 0.7 0.7 0.7 BYK-A535 Total (g) 100 100 100 100 100 100 100 Kyung
fury
my
Castle
minute modified polyamines 55.0 55.0 55.0 - - 55.0 55.0 Anquamin 287 MDI - - - 100.0 - - - (BASF) Oil-based epoxy curing agent - - - - 100.0 - - D-230 (Huntzmann) water 45.0 45.0 45.0 - - 45.0 45.0 tap water Total (g) 100 100 100 100 100 100 100 hydraulic powder ingredients cement 23.0 23.0 23.0 23.0 - 23.0 23.0 Alumina Cement 70N (Union) silica 60.0 60.0 60.0 60.0 - 60.0 60.0 color pigment 3.0 3.0 3.0 3.0 - 3.0 3.0 filler 12.2 12.2 12.2 12.2 - 12.2 12.2 Barium Sulfate (Tongyang Material) glidant 1.3 1.3 1.3 1.3 - 1.3 1.3 antifoam 0.5 0.5 0.5 0.5 - 0.5 0.5 Total (g) 100 100 100 100 - 100 100

Then, as the curing agent, water was added to each type of curing agent and stirred at room temperature for 30 minutes at 1200 RPM or higher using a high-speed stirrer to prepare a curing agent component.

Then, as the hydraulic powder component _{, silica, a coloring pigment, a filler, a fluidizing agent, and an antifoaming agent were added to white alumina cement having an Al 2} O ₃ content of 69.5 parts by weight or more in a ribbon mixer, and then stirred at room temperature at RPM 40 to 50 for 60 minutes. A hydraulic powder component was prepared.

According to the above method, based on the composition ratio of Table 1 below, graphene-containing aqueous and oil-based bonding environment-friendly according to Examples 1 to 3, Comparative Examples 1 to 3, and Reference Example 1 including the main component, the curing agent component, and the hydraulic powder component I got the flooring.

For reference, Comparative Example 1 is a resin mortar type eco-friendly flooring material, and Comparative Example 2 is a solvent-free epoxy type flooring material.

In order to examine the physical properties of the eco-friendly flooring material formed from the composition including the main component, curing agent component, and hydraulic powder component of Examples 1, 2, 3, Comparative Examples 1, 2, 3 and Reference Example 1, the main component, the curing agent Component, hydraulic powder component in a weight ratio of 0.6: 1.0: 4.0 (Examples 1 to 3, Comparative Example 3, Reference Example 1), 0.95: 1.0: 4.29 (Comparative Example 1), 3.3: 1.0: 0.0 (Comparative Example 2) mixed in proportions.

At this time, the equivalence ratio of the main component and the curing agent component was adjusted to be 1:1, and the main component and the curing agent component must be first mixed and then the hydraulic powder component must be mixed. In order to evaluate the coating film performance of the eco-friendly flooring, test specimens were prepared as shown in Table 2.

Test Items Dimensions of test piece (unit: mm) Count Mixability (Subject + Hardener) 200g One Reactivity (dry, subject + hardener) Film thickness: 76㎛ One Pot life (minutes) 300g One The tensile strength 165cm, gage distance 115cm 3 elongation 165cm, gage distance 115cm 3 Water Vapor Permeability 289x289x5 dry film 3 Chloride ion penetration resistance (Coulombs) Φ100x50 mortar(2) 3

* Note (2): The mortar formulated in the method specified in 7.3.1 of KS F 2476 is molded using a metal or resin-containing mold suitable for each dimension, and the temperature is 20*?*℃ and the relative humidity is 90% or higher. After curing for 48 hours, it is demolded and cured in water at a temperature of 20*?*℃ for 5 days, and cured at a relative humidity of 65±20% and a temperature of 20±2℃ for more than 7 days. After that, use No. 150 abrasive paper specified in KS L 6003 to grind and clean the underside of the mortar when compacting it as a test specimen.

[Types of test specimens and surface treatment methods]

The first scraping operation of each of the flooring materials prepared above with a spatula or a plasterer knife at a relative humidity of 85% or less and a temperature of 15 to 30° C. or less on the surface-treated specimen as described above is performed to a dry film thickness of 1 mm, and 2 After construction with a dry film thickness of 3 mm by car, the film was dried at room temperature for 7 days and then the film properties were tested.

The coating film property test was evaluated according to the coating film property evaluation method as follows.

1) Mixability test

After mixing the main component and the curing agent component prepared above at a specified mixing ratio, the degree of miscibility was expressed as a numerical value ranging from 1 to 10 after visual observation.

2) Reactivity (dry)

After mixing the main component and curing agent component prepared above at the specified mixing ratio, forming a coating film with a wet film thickness of 76 μm with a film applicator, after 24 hours have elapsed, the drying degree was observed.

3) Pot life

The usable time was measured after mixing the main component prepared above, the curing agent component, and the hydraulic powder component at a specified mixing ratio.

4) Tensile strength

The specimen prepared above was measured at a load rate of 5 mm/min according to the test method of ASTM E638.

5) elongation

The specimen prepared above was measured at a load rate of 5 mm/min according to the test method of ASTM E638.

6) Water Vapor Permeability

The specimen prepared above was measured according to the test method of ASTM E96-95 (wet cup).

7) Chloride ion penetration resistance test

The specimen prepared above was measured according to the test method of 5.4 of KS F 4936.

Table 3 shows the results of evaluation of the physical properties of the specimens by the above method.

Evaluation items Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Reference Example 1 Mixability (Subject + Hardener) 9.5 9.5 9.5 9.0 10 4 9.5 Reactivity (Subject + Hardener) 10 10 10 10 10 not measurable 10 Pot life (minutes) 50 50 50 12 40 not measurable 50 Tensile strength (MPa) 38 41 41 36 33 not measurable 37 Elongation (%) 6.2 7.3 7.5 6.3 4.4 not measurable 5.1 Water Vapor
Permeability 4.17x10 ^-7 4.65x10 ^-7 5.08x10 ^-7 8.74x10 ^-8 6.49x10 ^-9 not measurable 5.75x10 ^-7 Chloride ion penetration resistance (Coulombs) 167 160 160 163 155 not measurable 165

As summarized in Table 3 above, in the case of mixability and reactivity, Examples 1, 2, 3 Comparative Examples 1 and Reference Example 1 have slightly inferior miscibility than Comparative Example 2 using a solvent-free epoxy resin and an oil-based epoxy curing agent (after mixing) When left at room temperature, a slight bleeding phenomenon is observed) It can be seen that the reaction (drying) during coating proceeds normally in the same manner as in Comparative Example 2, so there is a slight bleeding phenomenon, but the drying reaction is normally performed.

In the case of the pot life, as shown in the evaluation results of Examples 1, 2, and 3 Reference Example 1, when using a self-synthesized non-solvent epoxy resin with a polar group, compared to Comparative Example 1 in which vegetable oil and isocyanate were reacted, the pot life was increased. It can be seen that the improvement has been significantly improved.

In the case of the tensile strength and elongation, as shown in the evaluation results of Examples 1, 2, and 3 using graphene oxide, Reference Example 1 using graphene and Comparative Example 1 using no graphene increased by about 13 to 24% or more it can be seen that In the case of Reference Example 1 using graphene, it was confirmed that the bonding strength between graphene and the epoxy resin was decreased.

In the case of the water vapor (air entrainment) performance, Examples 1, 2, and 3 using self-synthesized solvent-free epoxy resin are about 10 compared to Comparative Example 1 using vegetable oil and Comparative Example 2 using general solvent-free epoxy resin It can be seen that the water vapor performance is increased by more than 100 times.

In the case of the chloride ion penetration resistance, as shown in the evaluation results of Examples 1, 2, 3 Comparative Examples 1 and 2 Reference Example 1, considering that the standard value of KS F4936 is 1000 or less, epoxy resin, vegetable oil, ceramic powder component And it can be seen that both have excellent performance regardless of the use of graphene.

In the case of Comparative Example 3, the mixture of the oil-based solvent-free epoxy resin and the water-soluble epoxy curing agent was very poor, and thus the formation of the coating film itself was impossible, making it impossible to test the overall physical properties.

A series of evaluation results as described above show that, when water-based and oil-based combined eco-friendly flooring materials containing graphene oxide are used in the construction method of the present invention, concrete deterioration and deterioration with eco-friendly long pot life, tensile strength, elongation, water vapor performance, etc. It is provided to support the formation of an anti-aging coating film, and the present invention is not necessarily limited only by the above embodiments, and various substitutions, modifications, and changes are possible without departing from the technical spirit of the present invention. Of course.

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Claims (7)

A solvent-free oil-based epoxy resin having a polar group, an amphoteric solvent, graphene oxide, and a main agent comprising an antifoaming agent, wherein the polar group is an alkoxy group, a hydroxyl group, or a silane group;
A curing agent comprising a water-soluble epoxy curing agent and water; and
An eco-friendly flooring material made of hydraulic powder containing cement, silica, color pigments, fillers, fluidizing agents and defoaming agents. The method of claim 1,
The main agent is characterized in that it consists of 93 to 97 parts by weight of a solvent-free oil-based epoxy resin having a polar group, 2 to 6 parts by weight of an amphoteric solvent, 0.1 to 0.5 parts by weight of graphene oxide, and 0.5 to 1 parts by weight of an antifoaming agent with respect to 100 parts by weight of the main agent. eco-friendly flooring. The method of claim 1,
The curing agent is an eco-friendly flooring, characterized in that consisting of 50 to 60 parts by weight of a water-soluble epoxy curing agent, and 40 to 50 parts by weight of water based on 100 parts by weight of the curing agent. According to claim 1,
The hydraulic powder contains 20 to 30 parts by weight of cement, 50 to 65 parts by weight of silica, 1.5 to 5 parts by weight of a coloring pigment, 10 to 15 parts by weight of a filler, 0.8 to 1.5 parts by weight of a fluidizer, and 0.2 parts by weight of an antifoaming agent based on 100 parts by weight of the hydraulic powder. An eco-friendly flooring, characterized in that consisting of to 0.8 parts by weight. delete According to claim 1,
The main component and the hardener component are mixed in an equivalent ratio of 1:1, and the hydraulic powder component is 1:2.2 to 2.5 (weight ratio) with respect to the mixture of the main component and the hardener component. A surface treatment step of surface treatment of the concrete structure;
A scraping operation step of applying the eco-friendly flooring material according to any one of claims 1 to 4 to the surface-treated structure to a thickness of 1 mm or less; and
The step of applying the eco-friendly flooring material according to any one of claims 1 to 4 to the structure subjected to the scraping operation to a thickness of 2 to 8 mm and curing after curing
An eco-friendly flooring construction method comprising a.

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