Interior and exterior materials, and methods for reinforcing interior and exterior base materials.

Abstract

To provide an interior / exterior material that enhances a strength of the interior / exterior material, and a method for reinforcing an interior / exterior base material.SOLUTION: An interior / exterior material includes: a coating layer 13 which is a cured product of a two-part reaction curing type epoxy resin containing a main agent which is a bisphenol A type epoxy resin to which a non-polar functional group is added, and a curing agent; and an interior / exterior base material 11 to which the coating layer 13 is adhered. The coating layer 13 is adhered to the interior / exterior base material 11 in a state in which reinforcing fibers 12 are impregnated with the two-part reaction curing type epoxy resin.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to interior and exterior materials, and methods for reinforcing interior and exterior substrates. [Background technology]

[0002] Cement-based materials such as slate, which have excellent heat resistance and fire resistance, are used as interior and exterior substrates, which are the base materials for interior and exterior materials such as roofing materials and exterior wall materials. Two-component reaction-curing epoxy resins that do not require heat curing are applied to the painted finish of interior and exterior substrates used in large structures (see, for example, Patent Document 1). One method for painting and finishing interior and exterior substrates includes forming a primer layer made of a two-component water-based epoxy resin and then applying a mortar layer made of water-curable cement mortar over the primer layer (see, for example, Patent Document 2). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] International Publication No. 2010 / 137636 [Patent Document 2] Japanese Patent Publication No. 2009-256133 [Overview of the project] [Problems that the invention aims to solve]

[0004] Incidentally, when interior and exterior materials lack sufficient strength or exhibit defects, a hard resin is applied to the surface of the material to compensate for its lack of strength. However, simply reinforcing interior and exterior materials with a hard resin carries the potential risk of cracking in the resin coating itself. Ultimately, in the field of interior and exterior materials, there is still a strong desire to further increase the strength of these materials. [Means for solving the problem]

[0005] An interior and exterior material for solving the above problems comprises an interior and exterior substrate and a reinforcing layer which is a composite of a coating layer and reinforcing fibers that are in close contact with the interior and exterior substrate. The coating layer is a cured product of a two-component reaction-curing epoxy resin containing a main component which is a bisphenol A type epoxy resin to which non-polar functional groups have been added, and a curing agent. The two-component reaction-curing epoxy resin is impregnated into the reinforcing fibers and is in close contact with the interior and exterior substrate. The reinforcing fibers are one of the following: a pile fabric net, a nonwoven fabric net, a looped net, and a hexagonal mesh net.

[0006] With the above-mentioned interior and exterior materials, the intermolecular bonds between the main components are weakened compared to cases where a bisphenol A type epoxy resin without non-polar functional groups is used as the main component. As a result, the micronization of the cured material on the surface to which the two-component reaction-curing epoxy resin is applied is promoted, improving the conformability, adhesion, and coverage of the cured material on that surface. This makes it possible to increase the bending strength, compressive strength, and tensile strength of the interior and exterior materials with the two-component reaction-curing epoxy resin. Furthermore, the above-mentioned two-component reaction-curing epoxy resin can be applied to boarding and tile substrates, as well as to the repair of chips in precast concrete members, and it is possible to increase the strength in each application. The interior and exterior substrates are covered with a reinforcing layer composed of a cured material impregnated with reinforcing fibers, which are one of the following: a piled cotton net, a nonwoven fabric net, a looped net, or a hexagonal mesh net, and the reinforcing fibers. This allows for improved adhesion between the interior / exterior substrate and the reinforcing layer through curing, and also enhances the strength of the two-component reaction-curing epoxy resin through reinforcing fibers, thereby further increasing the bending strength, compressive strength, and tensile strength of the interior / exterior materials. Furthermore, the reinforcing layer and finishing layer become more responsive to the movement of the substrate and cracks that occur in the substrate.

[0007] In the above-mentioned interior and exterior materials, the curing agent may be at least one of the group consisting of amine-based curing agents, imidazole-based curing agents, polymercaptan-based curing agents, and acid anhydride-based curing agents. The above-mentioned interior and exterior materials make it possible to suppress the instability during storage caused by the high reactivity of polythiol-based epoxy curing agents, compared to configurations that use polythiol-based epoxy curing agents. Furthermore, it becomes possible to enhance the effectiveness of increasing the bending strength, compressive strength, and tensile strength of the interior and exterior materials.

[0008] In the above-mentioned interior and exterior materials, the non-polar functional group may be added to the bisphenol A type epoxy resin by composite modification of the bisphenol A type epoxy resin. According to the above-mentioned interior and exterior materials, it is possible to enhance the effectiveness of maintaining the durability and weather resistance, which are characteristics of cured products with bisphenol A type epoxy resin as the main framework.

[0009] In the above-mentioned interior and exterior materials, the coating layer may adhere to the interior and exterior substrate as a single-layer structure that does not include a primer layer. An example of a primer layer is a primer layer used in the painted finish of an interior or exterior substrate. According to the above-mentioned interior and exterior materials, it is also possible to reduce the load required to reinforce the interior and exterior base materials.

[0010] A method for reinforcing interior and exterior substrates to solve the above problems includes impregnating reinforcing fibers with a two-component reaction-curing epoxy resin on the interior and exterior substrate without forming a primer layer on the substrate, wherein the two-component reaction-curing epoxy resin comprises a main component which is a bisphenol A type epoxy resin to which non-polar functional groups have been added, and a curing agent, and the reinforcing fibers are one of the following: a woven fabric net, a nonwoven net, a looped net, and a hexagonal mesh net.

[0011] According to the above method for reinforcing interior and exterior substrates, the load required for reinforcing the substrates can be reduced because the process of forming a primer layer is not required. Furthermore, by coating the surface of the interior and exterior substrates with the cured product of the two-component reaction-curing epoxy resin, it is possible to increase the bending strength, compressive strength, and tensile strength of the interior and exterior materials. In other words, the curable resin composition also functions as a primer layer. [Brief explanation of the drawing]

[0012] [Figure 1] Cross-sectional view of the interior and exterior finishing materials in one embodiment of the interior and exterior finishing materials. [Figure 2] Cross-sectional view showing one step in one embodiment of a method for reinforcing an interior and exterior finishing substrate. [Figure 3] Cross-sectional view showing one step in one embodiment of a method for reinforcing an interior and exterior finishing substrate. [Figure 4] Schematic diagram showing a structural model before curing of a two-component reaction-curing epoxy resin. [Figure 5] Schematic diagram showing a structural model after curing of a two-component reaction-curing epoxy resin. [Figure 6] Schematic diagram showing a coating model after curing of a two-component reaction-curing epoxy resin. [Figure 7] Graph showing the relationship between stroke and load in a bending fracture load test of the interior and exterior finishing materials.

Mode for Carrying Out the Invention

[0013] Referring to FIGS. 1 to 7, one embodiment of an interior and exterior finishing material and a method for reinforcing an interior and exterior finishing substrate will be described. First, the configuration of the interior and exterior finishing material will be described, then the method for reinforcing the interior and exterior finishing substrate will be described, and then the configuration of the two-component reaction-curing epoxy resin used in the reinforcing method will be described.

[0014] [Interior and Exterior Finishing Materials] The interior and exterior finishing material will be described with reference to FIG. 1. The interior and exterior finishing material includes an interior and exterior finishing substrate 11, reinforcing fibers 12, and a coating layer 13. The coating layer 13 is a single-layer structure having a non-prime structure without a primer layer. The reinforcing fibers 12 are covered by the coating layer 13. The built-in member may include a topcoat layer covering the coating layer 13 for the purpose of enhancing weather resistance. The topcoat layer is formed, for example, by overcoating the coating layer 13 with an acrylic resin, a urethane resin, an acrylic silicone resin, a silicone resin, or a fluororesin.

[0015] The composite of reinforcing fibers 12 and coating layer 13 is a reinforcing layer that reinforces the interior / exterior substrate 11. The reinforcing layer is coated onto the interior / exterior substrate 11. The coating layer 13 is in close contact with the interior / exterior substrate 11 with the reinforcing fibers 12 impregnated with a two-component reaction-curing epoxy resin.

[0016] An example of an interior / exterior substrate 11 is a cement substrate. The interior / exterior substrate 11 may also be a metal substrate, a wood substrate, or a stone substrate. Cement substrates include corrugated slate such as asbestos slate, flat decorative slate such as Colorbest, slate materials such as Colonial boards, or calcium silicate boards and gypsum boards. The interior / exterior substrate 11 may also be concrete members such as precast concrete curtain walls. Concrete includes reinforced concrete containing fibers or resins. Metal substrates include stainless steel substrates, aluminum substrates, and iron-aluminum-zinc alloy substrates. Wood-based substrates include solid wood, laminated wood, plywood, and wood-based boards.

[0017] The reinforcing fibers 12 cover the surface of the interior and exterior substrate 11. The reinforcing fibers 12 may be a layered member made of woven fibers or a layered member made of knitted fibers. The reinforcing fibers 12 may also be a layered member in which loop-shaped fibers, such as knitted loops, are knitted into a sheet or mat. The two-component reaction-curing epoxy resin impregnated into the reinforcing fibers 12 increases the bending strength, compressive strength, and tensile strength of the reinforcing layer.

[0018] The reinforcing fiber 12 is one of the following: a standing blanket net, a nonwoven fabric net, a looped net, or a hexagonal mesh net. Figure 1 shows an example where the reinforcing fiber 12 is a looped net. A piled fabric net is a mesh-like fabric net with a piled section. The piled section is formed by cut pile, where the ends of the fibers are cut. A nonwoven fabric net is a nonwoven fabric base fabric with yarn woven into the nonwoven fabric. The yarn is woven into the nonwoven fabric using the needle punch method or stitch bond method, which causes the nonwoven fabric to have a pile. A looped net is a mesh-like base sheet with looped fibers. The looped fibers are planted on one or both sides of the base sheet. A hexagonal mesh net is a tortoise-shell-shaped net in which the openings of the mesh or weave are hexagonal. The mesh formed by the net in the reinforcing fiber 12 exposes the surface of the interior / exterior substrate 11 to the coating layer 13 in the thickness direction of the reinforcing fiber 12. The mesh formed by the net in the reinforcing fiber 12 is, for example, 9 mm wide to allow the two-component reaction-curing epoxy resin forming the coating layer 13 to pass through easily. 2 It has the above dimensions. The two-component reaction-curing epoxy resin that forms the coating layer 13 is bonded to the surface of the interior and exterior substrate 11 through the mesh formed by the net in the reinforcing fibers 12. The fibers constituting the reinforcing fiber 12 may be organic fibers or inorganic fibers. The fibers constituting the reinforcing fiber 12 are at least one selected from the group consisting of synthetic fibers, acetate-based semi-synthetic fibers, regenerated fibers such as rayon, aramid fibers, high-strength polyethylene fibers, polybenzazole fibers, carbon fibers, boron fibers, cotton, and hemp. The material constituting the synthetic fiber is at least one selected from the group consisting of polyester, polyamide, polypropylene, polyvinyl alcohol, nylon, and acrylic. The fibers constituting the reinforcing fiber 12 may be monofilaments or multifilaments. The base sheet constituting the reinforcing fiber 12 may be a knitted fabric such as weft knit or warp knit, or a woven fabric such as plain weave, twill weave, or satin weave. The two-component reaction-curing epoxy resin that forms the coating layer 13 passes through the base sheet or nonwoven fabric of the reinforcing fiber 12. The pile and loop-shaped fibers of the reinforcing fiber 12 enhance the anchoring effect to the coating layer 13, and if there are portions exposed from the coating layer 13, they enhance the anchoring effect to the topcoat layer. The yarn woven into the nonwoven fabric suppresses the occurrence of irregularities in the coating layer 13 depending on the basis weight of the nonwoven fabric, and improves the surface accuracy of the coating layer 13.

[0019] The coating layer 13 covers the surface of the interior and exterior substrate 11. The coating layer 13 is a cured product of a two-component reaction-curing epoxy resin. The two-component reaction-curing epoxy resin is prepared by mixing the main component and the curing agent immediately before application.

[0020] The coating layer 13 joins the interior / exterior substrate 11 to the reinforcing fibers 12. The coating layer 13 may cover all of the fibers constituting the reinforcing fibers 12, or it may leave some of the fibers constituting the reinforcing fibers 12 exposed from within the coating layer 13. If the interior / exterior substrate 11 is an asbestos slate or the like that scatters fibers or powder, the coating layer 13 contains the scattering of these materials from the surface of the interior / exterior substrate 11.

[0021] The two-component reaction-curing epoxy resin used to form the coating layer 13 has a viscosity sufficient to impregnate the reinforcing fibers 12. If the reinforcing fibers 12 have loop-shaped fibers, a two-component reaction-curing epoxy resin with a viscosity sufficient to flow into the loops is used to form the coating layer 13.

[0022] [Methods for reinforcing interior and exterior substrates] A method for reinforcing interior and exterior substrates will be explained with reference to Figures 2 and 3. The method for reinforcing interior and exterior substrates includes a step of applying a two-component reaction-curing epoxy resin to the surface of the interior and exterior substrate 11. Prior to applying the two-component reaction-curing epoxy resin, the method for reinforcing interior and exterior substrates may include a pretreatment step such as cleaning, roughening, or washing the surface of the interior and exterior substrate 11. Furthermore, the method for reinforcing interior and exterior substrates may include a step of attaching reinforcing fibers 12 to the surface of the interior and exterior substrate 11, and a step of further applying a two-component reaction-curing epoxy resin to the surface of the reinforcing fibers 12.

[0023] The surface pretreatment methods for the interior and exterior substrate 11 include wiping with a cloth, washing with water or high-pressure water, cleaning and roughening with power tools such as electric brushes or disc sanders, or blasting. Surface cleaning removes dirt that adheres to the surface, as well as deteriorated parts of the substrate and the deteriorated coating layer on the surface.

[0024] As shown in Figure 2, the step of applying the two-component reaction-curing epoxy resin involves applying the two-component reaction-curing epoxy resin to the surface of the interior / exterior substrate 11, thereby forming a first coating layer 13A. Furthermore, as shown in Figure 3, reinforcing fibers 12 are attached to the first coating layer 13A before it hardens. The step of applying the two-component reaction-curing epoxy resin then includes impregnating the reinforcing fibers 12 with the two-component reaction-curing epoxy resin, thereby forming a second coating layer 13B. The two-component reaction-curing epoxy resin for forming the first coating layer 13A and the two-component reaction-curing epoxy resin for forming the second coating layer 13B contain the same main component and the same curing agent.

[0025] Applying a two-component reaction-curing epoxy resin means that the application rate per application is 100 g / m². 2 More than 10kg / m 2 Preferably 300 g / m² 2 More than 3kg / m 2The two-component reaction-curing epoxy resin is applied as follows. The amount of the two-component reaction-curing epoxy resin applied may be changed based on the required strength of the interior and exterior material, or based on the degree of deterioration of the interior and exterior substrate 11. The amount of the two-component reaction-curing epoxy resin applied may be changed based on the type and thickness of the reinforcing fibers 12, or based on the type of two-component reaction-curing epoxy resin.

[0026] The step of attaching the reinforcing fibers 12 involves placing the reinforcing fibers 12 on the first coating layer 13A. Whether the interior / exterior substrate 11 is intact or partially damaged, attaching the reinforcing fibers 12, by applying the reinforcing fibers 12 and then applying a second layer of coating, increases the strength of the interior / exterior material and also makes it possible to repair the interior / exterior material. The step of applying the two-component reaction-curing epoxy resin then creates a high adhesion between the coating layer 13 and the reinforcing fibers 12 without using a primer layer, causing the reinforcing fibers 12 to adhere to the surface of the interior / exterior substrate 11. Furthermore, the step of applying the two-component reaction-curing epoxy resin makes it possible to improve the adhesion between the surface of the interior / exterior substrate 11 and the reinforcing layer, whether or not the reinforcing fibers 12 are used.

[0027] Furthermore, if the reinforcing fibers 12 are configured such that upright fibers or loop-shaped fibers are implanted on both sides of the base sheet, the bonding strength between the interior / exterior base material 11 and the reinforcing fibers 12 can be further enhanced. In addition, even if rust has occurred on the metal interior / exterior base material 11, it is possible to adhere the reinforcing layer to the surface of the interior / exterior base material 11 by removing most of the weak rust. The high adhesion between the interior / exterior base material 11 and the reinforcing layer makes it possible to suppress the occurrence of new rust and the further progression of existing rust.

[0028] [Two-component reaction-curing epoxy resin] Referring to Figures 4 to 6, a two-component reaction-curing epoxy resin in one embodiment will be described. The two-component reaction-curing epoxy resin includes the following [A] to [C]. In addition to the following [A] to [C], the two-component reaction-curing epoxy resin may also include additive [D]. [A] Main ingredient [B] Hardener [C] Medium

[0029] [A] The main component is a bisphenol A type epoxy resin to which nonpolar functional groups have been added. The mixing ratio of curing agent [B] to main component [A] is 0.8 equivalents or more and 1.2 equivalents or less per mole of epoxy groups in main component [A]. If the mixing ratio of curing agent [B] to main component [A] is 0.8 equivalents or more, it is possible to increase the crosslinking density in the coating layer 13, thereby increasing the strength of the coating layer 13, such as bending strength, compressive strength, and tensile strength. This makes it possible to suppress cracking of interior and exterior materials. If the mixing ratio of curing agent [B] to main component [A] is 1.2 equivalents or less, it is possible to suppress the increase in unreacted curing agent [B], thereby suppressing the decrease in strength of the coating layer 13, such as bending strength, compressive strength, and tensile strength.

[0030] The mixing ratio of main component [A] to 100 parts by mass of two-component reaction-curing epoxy resin may be 60 parts by mass or more and 95 parts by mass or less. Preferably, the mixing ratio of main component [A] to 100 parts by mass of two-component reaction-curing epoxy resin is 70 parts by mass or more and 90 parts by mass or less. If the content of main component [A] is 60 parts by mass or more, it is possible to increase the flexural strength, compressive strength, and tensile strength of the cured product of the two-component reaction-curing epoxy resin. If the content of main component [A] is 95 parts by mass or less, it is possible to increase the heat resistance of the cured product of the two-component reaction-curing epoxy resin.

[0031] As shown in Figure 4, the molecular structure of the main component [A] before curing comprises a bisphenol A type epoxy resin constituting the main chain 21 and a nonpolar functional group 22 added to the main chain 21. The main chain 21 is a bisphenol A type epoxy resin having two or more glycidyl groups in one molecule. The nonpolar functional group 22 is added to the main component [A] through a complex modification to depolarize the main chain 21. An example of a complex modification to depolarize the main chain 21 is dehydration condensation with the alcoholic hydroxyl group of the main chain 21.

[0032] The epoxy equivalent is the mass per mole of epoxy groups (g / eq). [A] The epoxy equivalent of the main component can be changed as appropriate. The epoxy equivalent may be 200 g / eq or more and 4000 g / eq or less, or 1000 g / eq or more and 3000 g / eq or less. If the epoxy equivalent is 200 g / eq or more, high processability, corrosion resistance, and curability can be obtained. On the other hand, if the epoxy equivalent is 4000 g / eq or less, appropriate dilution in a medium with suitable viscosity, penetration, and processability can be obtained.

[0033] [A] The main chain 21 constituting the main component may be a liquid epoxy resin or a solid epoxy resin. The number of bisphenol A skeletons repeated in the main chain 21 may be between 1 and 10. The number of bisphenol A skeletons repeated is appropriately set based on the viscosity required for the two-component reaction-curing epoxy resin. If the number of bisphenol A skeletons repeated is between 1 and 3, the main component [A] is a liquid at room temperature, and if the number of bisphenol A skeletons repeated is between 3 and 10, the main component [A] is a solid at room temperature.

[0034] Examples of bisphenol A type epoxy resins include Epiclon® 850 (manufactured by DIC Corporation), Epotote® YD-128 (manufactured by Nippon Steel & Sumitomo Metal Chemical Corporation), DER-331, DER-332 (both manufactured by Dow Chemical Japan Ltd.), and EPON825, jER826, jER827, jER828 (all manufactured by Mitsubishi Chemical Corporation).

[0035] [A] An example of the main component is shown by the following formula (1). [A] An example of the main component contains a bisphenol A skeleton as a repeating unit. In equation (1), R 0 Each of these is independently a hydrogen atom or an alkyl group having 1 to 10 carbon atoms. In formula (1), m is an integer of 1 or more. In formula (1), n ​​is an integer of 1 or more. In formula (1), R 1 R is a nonpolar functional group 22, which has a sufficiently small dipole moment among the functional groups. 1This is one selected from the group consisting of a chain alkyl group having 3 to 10 carbon atoms, such as a butyl group or an octyl group; a cyclic alkyl group, such as a cyclohexyl group; a phenyl group; and a diphenyl group.

[0036] [ka] As shown in Figure 5, the molecular structure of the main component [A] in the cured product of a two-component reaction-curing epoxy resin has a spherical shape in which the main chain 21 and side chains are intertwined through interactions. In conventional two-component reaction-curing epoxy resins in which the nonpolar functional group 22 is not added to the main component [A], one main component [A] and another main component [A] are further intertwined through intermolecular interactions. As a result, the particle diameter of the main component [A] in the cured product reaches between 50 μm and 100 μm.

[0037] On the other hand, when a nonpolar functional group 22 is added to the main component [A], the nonpolar functional groups 22 repel each other from approaching adjacent main components of [A]. As a result, entanglement through interaction between one main component of [A] and another is less likely to occur, and the main component of [A] becomes finer in the cured product. The particle diameter of the main component of [A] in the cured product is reduced to about 1 / 10,000th of that of a configuration without the nonpolar functional group 22, ranging from 5 nm to 80 nm.

[0038] As shown in Figure 6, the surface of the interior / exterior substrate 11 is an uneven surface containing minute irregularities. These minute irregularities on the surface of the interior / exterior substrate 11 can form gaps between the surface of the interior / exterior substrate 11 and the reinforcing layer, potentially reducing the adhesion between the surface of the interior / exterior substrate 11 and the reinforcing layer. In this regard, the cured product 13M containing the main component [A], which has been micronized by the addition of nonpolar functional groups 22, conforms to the surface of the interior / exterior substrate 11, improving the adhesion between the surface and the reinforcing layer, as well as the covering ability of the reinforcing layer. In addition, the cured product 13M, which has been micronized by the addition of nonpolar functional groups 22, also increases the bending strength, compressive strength, and tensile strength of the reinforcing layer. In other words, the two-component reaction-curing epoxy resin with added nonpolar functional groups 22 has high strength and high deformation conformability.

[0039] [B] The curing agent is at least one selected from the group consisting of amine-based curing agents, imidazole-based curing agents, polymercaptan-based curing agents, and acid anhydride-based curing agents. The curing agent may also be a thiol-based curing agent.

[0040] Amine-based curing agents include polyamidoamine-based curing agents and polyamide resin-containing varnishes. The amine-based curing agent is at least one selected from the group consisting of aliphatic amine-based curing agents, aromatic amine-based curing agents, modified amine-based curing agents, polyamidoamines, secondary amine-based curing agents, and tertiary amine-based curing agents. Examples of aliphatic amine-based curing agents include ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, dipropylenediamine, diethylaminopropylamine, and polypropylenetriamine. Examples of aromatic amine-based curing agents include aromatic diaminodiphenylmethane compounds, 2,4-diaminotoluene, 1,4-diaminobenzene, and 1,3-diaminobenzene.

[0041] Imidazole-based curing agents include, for example, 2-methylimidazole, 2-ethyl-4-methylimidazole, 2-undecylimidazole, 2-heptadecylimidazole, 2-phenylimidazole, and 1-benzyl-2-methylimidazole. Polymercaptan-based curing agents include, for example, liquid polymercaptans and polysulfide resins.

[0042] The acid anhydride-based curing agent is at least one selected from the group consisting of phthalic anhydride compounds and carboxylic acid anhydrides. Examples of phthalic anhydride compounds include 3,4-dimethyl-6-(2-methyl-1-propenyl)-1,2,3,6-tetrahydrophthalic anhydride, methyltetrahydrophthalic anhydride, methylhexahydrophthalic anhydride, and hexahydrophthalic anhydride. Examples of carboxylic acid anhydrides include 1-isopropyl-4-methyl-bicyclo[2.2.2]octo-5-ene-2,3-dicarboxylic acid anhydride, benzophenonetetracarboxylic dianhydride, and diphenyl-3,3',4,4'-tetracarboxylic dianhydride.

[0043] [C] The medium shall facilitate the mixing of the two-component reaction-curing epoxy resin and the curing agent. [C] The medium may be a solvent consisting of a single liquid, or a mixed solvent which is a mixture of two or more liquids. [C] The medium may be an organic solvent, an organic solvent, or an organic dispersion medium. The medium may be at least one selected from the group consisting of aliphatic or aromatic hydrocarbons, alcohols, ethers, esters, and alcohol ethers.

[0044] [Additives] Additives include, for example, curing accelerators, reactive diluents, polymerization initiators, viscosity modifiers, plasticizers, leveling agents, defoamers, anti-sedimentation agents, stabilizers, rust inhibitors, fluorescent agents, UV absorbers, and antioxidants. Other additives include, for example, fiber diameter resins, inorganic fillers, and inorganic colorants.

[0045] The curing accelerator promotes the curing reaction in a two-component reaction-curing epoxy resin. Examples of the curing accelerator include phosphorus compounds such as triphenylphosphine and tributylphosphine, tertiary amine compounds such as triethylamine and benzyldimethylamine, and imidazoles such as 2-methylimidazole and 2-ethyl-4-methylimidazole.

[0046] The reactive diluent lowers the viscosity of the two-component reaction-curing epoxy resin without impairing the properties of the two-component reaction-curing epoxy resin. The reactive diluent may be a monoepoxy compound. Examples of the monoepoxy compound include alkyl monoglycidyl ether, alkyl diglycidyl ether, and alkylphenol monoglycidyl ether.

[0047] Examples of the inorganic filler include silicas such as fused silica and crystalline silica, aluminum oxide, aluminum phosphate, silicon nitride, silicon oxide, magnesium oxide, and calcium carbonate. Examples of the coloring agent include titanium oxide, yellow iron oxide, and carbon black.

[0048] [Examples] A layered member in which loop-shaped inorganic fibers are woven into one side of a net-shaped base sheet is arranged on the surface of a slate for a corrugated roof as an example of the reinforcing fiber of the net with loops, and a two-component reaction-curing epoxy resin is applied so that the coating amount becomes 750 g / m 2 to impregnate the layered member to form the interior and exterior finishing material of the example. At this time, the nonpolar functional group of the main agent constituting the two-component reaction-curing epoxy resin was an octyl group. Also, an amine-based curing agent was used as the curing agent constituting the two-component reaction-curing epoxy resin.

[0049] Then, for the interior and exterior finishing material of the example, a bending fracture load test was conducted using a method compliant with JIS A 5423:2013, and the maximum load of the example was measured. Also, using a method compliant with JIS A 1106, the bending strength (N / mm 2The compressive strength (N / mm²) of the resin pieces of the cured product prepared using the two-component reaction-curing epoxy resin of the example was measured using a method compliant with JIS K 7181. 2 The tensile strength (N / mm²) of the resin pieces of the cured product prepared using the two-component reaction-curing epoxy resin of the example was measured using a method compliant with JIS K 7161. 2 ) was measured.

[0050] The application rate for the surface of corrugated roof slate is 750g / m². 2 The interior and exterior materials of the comparative example were formed by applying a high-strength structural reinforcing epoxy resin in this manner. In this case, as the main component constituting the high-strength structural reinforcing epoxy resin, a bisphenol A type epoxy resin, similar to the two-component reaction-curing epoxy resin, was used, which was a resin without modified non-polar functional groups.

[0051] Then, a bending fracture load test was performed on the interior and exterior materials of the comparative example using a method compliant with JIS A 5423:2013, and the maximum load of the comparative example was measured. In addition, the bending strength (N / mm²) of the interior and exterior materials of the comparative example was measured using a method compliant with JIS A 1106. 2 The compressive strength (N / mm²) of the resin pieces of the cured product prepared using the two-component reaction-curing epoxy resin of the comparative example was measured using a method compliant with JIS K 7181. 2 The tensile strength (N / mm²) of the resin pieces of the cured product prepared using the two-component reaction-curing epoxy resin of the comparative example was measured using a method compliant with JIS K 7161. 2 ) was measured.

[0052] Figure 7 shows the relationship between stroke and load in the bending fracture load test results using the interior and exterior materials of the example and the interior and exterior materials of the comparative example. As shown in Figure 7, the maximum load of the comparative example was 2804 N, while the maximum load of the example was a very high value of 7557 N.

[0053] The bending strength of the example was 66.6 (N / mm²). 2 ) and the bending strength of the comparative example is 40 (N / mm²). 2 ) and as a result, high bending strength was observed in the interior and exterior materials of the example. The compressive strength of the example is 90.4 (N / mm²). 2 ) and the bending strength of the comparative example is 70 (N / mm²). 2 ) and as a result, high compressive strength was observed in the interior and exterior materials of the example.

[0054] The tensile strength of the example is 72.8 (N / mm²). 2 ) and the tensile strength of the comparative example is 30 (N / mm²). 2 ) and as a result, high tensile strength was observed in the interior and exterior materials of the example.

[0055] According to the above embodiment, the following effects can be obtained. (1) [A] Since the main component is a bisphenol A type epoxy resin to which a non-polar functional group 22 has been added, the micronization of the cured material on the surface of the interior and exterior substrate 11 is promoted, thereby improving the conformability, adhesion, and coverage of the cured material on the surface. As a result, it is possible to increase the bending strength, compressive strength, and tensile strength of the interior and exterior material with a two-component reaction-curing epoxy resin.

[0056] (2) [B] Since it does not contain a polythiol-based epoxy curing agent, it is possible to suppress instability during storage caused by the high reactivity of the curing agent. This makes it possible to increase the effectiveness of improving the bending strength, compressive strength, and tensile strength of interior and exterior materials.

[0057] (3) By adding nonpolar functional groups 22 through composite modification of bisphenol A type epoxy resin, it becomes possible to enhance the effectiveness of maintaining the durability and weather resistance, which are the characteristics of cured products with bisphenol A type epoxy resin as the main backbone.

[0058] (4) When the reinforcing layer is equipped with reinforcing fibers 12, the strength of the two-component reaction-curing epoxy resin can be increased by the reinforcing fibers 12, which in turn makes it possible to further increase the bending strength, compressive strength, and tensile strength of the interior and exterior materials. In addition, the reinforcing layer and the finishing layer placed on top of the reinforcing layer become more responsive to the movement of the substrate and cracks that occur in the substrate.

[0059] (5) Since the coating layer 13 is a single-layer structure that does not include a primer layer, it is possible to reduce the load required to reinforce the interior and exterior substrates. It also contributes to shortening the construction period and reducing costs. (6) When a two-component reaction-curing epoxy resin is impregnated into reinforcing fibers 12 and then adhered to an interior or exterior substrate 11, the process of applying the two-component reaction-curing epoxy resin can include a step of increasing the strength of the two-component reaction-curing epoxy resin with the reinforcing fibers 12. This also makes it possible to simplify the work required for reinforcement.

[0060] (7) Even if deteriorated coating layers 13 or rust are not completely removed during the renovation of interior and exterior materials, the high adhesion of the two-component reaction-curing epoxy resin makes it possible to suppress the peeling of the new coating layer 13. Furthermore, even if rust remains in corners and other areas, it is possible to suppress the progression of corrosion of the interior and exterior substrate 11, thereby significantly improving the workability during renovation.

[0061] The above embodiment can be implemented with the following modifications. • If storage stability is not required for the two-component reaction-curing epoxy resin, it is possible to include a polythiol-based epoxy curing agent in [B] the curing agent.

[0062] • [A] The first coating layer 13A, formed from a two-component reaction-curing epoxy resin containing the main component, may be applied as a primer layer to a coating layer formed from a material other than the said two-component reaction-curing epoxy resin.

[0063] The interior and exterior material may have a configuration in which the interior and exterior base material 11 and reinforcing fibers 12 are integrated. In this case, the method of reinforcing the interior and exterior base material omits the step of attaching the reinforcing fibers 12 to the surface of the interior and exterior base material 11, and instead applies a two-component reaction-curing epoxy resin to the reinforcing fibers 12 integrated with the interior and exterior base material 11. The coating layer 13 is not interposed between the interior and exterior base material 11 and the reinforcing fibers 12, but covers the entire interior and exterior base material 11 and the fibers constituting the integrated reinforcing fibers 12, or a part of the fibers constituting the reinforcing fibers 12. [Explanation of Symbols]

[0064] 11...Interior and exterior substrate, 12...Reinforcement fiber, 13...Coating layer, 13M...Cured product, 21...Main chain, 22...Non-polar functional group.

Claims

1. Interior and exterior substrates, The system comprises a reinforcing layer which is a composite of a coating layer and reinforcing fibers that adhere closely to the interior and exterior substrate, The aforementioned coating layer is The main component is a bisphenol A type epoxy resin to which nonpolar functional groups have been added, It is a cured product of a two-component reaction-curing epoxy resin containing a hardening agent, The two-component reaction-curing epoxy resin is impregnated into the reinforcing fibers and is in close contact with the interior and exterior substrate. The reinforcing fiber is one of the following: a standing blanket fabric net, a nonwoven fabric net, and a looped net. The aforementioned interior and exterior substrate is one of the following substrates: slate, calcium silicate board, gypsum board, precast concrete, cement substrate, metal substrate, wood-based substrate, or stone. The reinforcing fiber has a base sheet and a pile portion that stands upright from the base sheet. The raised pile portion has an anchoring effect on the coating layer and is provided on the surface of the base sheet opposite to the surface facing the interior and exterior substrate, or on both sides of the base sheet. Interior and exterior materials.

2. The curing agent is at least one from the group consisting of amine-based curing agents, imidazole-based curing agents, polymercaptan-based curing agents, and acid anhydride-based curing agents. The interior and exterior material according to claim 1.

3. The nonpolar functional group is added to the bisphenol A type epoxy resin by a composite modification of the bisphenol A type epoxy resin. Interior and exterior material according to claim 1 or 2.

4. The aforementioned interior and exterior substrate contains fibers and powders, The coating layer prevents the fibers and powder from scattering from the surface of the interior and exterior substrate. Interior and exterior material according to any one of claims 1 to 3.

5. The process includes forming a coating layer on an interior or exterior substrate consisting of a cured product of a two-component reaction-curing epoxy resin. The step of forming the coating layer includes forming a first coating layer by applying the two-component reaction-curing epoxy resin to the interior / exterior substrate without forming a primer layer, and forming a second coating layer by impregnating the reinforcing fibers with the two-component reaction-curing epoxy resin on the interior / exterior substrate while the reinforcing fibers are attached to the first coating layer. The aforementioned two-component reaction-curing epoxy resin is The main component is a bisphenol A type epoxy resin to which nonpolar functional groups have been added, Contains a hardening agent, The reinforcing fiber is one of the following: a standing blanket fabric net, a nonwoven fabric net, and a looped net. The aforementioned interior and exterior substrate is one of the following substrates: slate, calcium silicate board, gypsum board, precast concrete, cement substrate, metal substrate, wood-based substrate, or stone. The reinforcing fiber has a base sheet and a pile portion that stands upright from the base sheet. The raised pile portion has an anchoring effect on the first coating layer and the second coating layer, and is provided on the surface of the base sheet opposite to the surface facing the interior and exterior substrate, or on both sides of the base sheet. A method for reinforcing interior and exterior substrates.

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