Eco-friendly adhesive composition for tiles or flooring being odorless or with excellent durability

Abstract

The present invention relates to an eco-friendly adhesive composition for tiles or flooring, which has excellent long-term durability. The present invention provides an adhesive composition for tiles or flooring, comprising 5-15 parts by weight of a curing agent with respect to 100 parts by weight of a main agent, wherein the main agent includes 12-hydroxy-9-cis-octadecenoic acid, a plasticizer, titanium dioxide, calcium carbonate having a size of 3-10 micrometers, coated calcium carbonate, reinforcing fibers, and talc. The present invention provides an adhesive composition for tiles or flooring, comprising 5-15 parts by weight of a curing agent with respect to 100 parts by weight of a main agent, wherein the main agent includes 12-hydroxy-9-cis-octadecenoic acid, maifanite, a plasticizer, titanium dioxide, calcium carbonate having a size of 3-10 micrometers, coated calcium carbonate, reinforcing fibers, and talc.

Description

Odorless or durable eco-friendly adhesive composition for tiles or floors

[0001] The present invention relates to an odorless or durable, eco-friendly adhesive composition for tiles or floors.

[0002] Ceramic tiles, with their excellent durability and beautiful colors and patterns, are commonly used for interior and exterior decoration and finishing in new construction or renovations in homes, offices, and factories. Recently, tile sizes have been increasing to facilitate work and save construction time.

[0003] Furthermore, tile installation is increasingly desired in humid areas like bathrooms, washrooms, and toilets, regardless of location. For this reason, tile adhesives are increasingly demanding high adhesion and water resistance.

[0004] Meanwhile, tile cement mortar is used for the final finishing of interiors, exteriors, and ceilings of buildings. In addition to the main ingredients, such as cement and sand, admixtures are added to enhance properties such as viscosity, adhesive strength, and workability. Thickeners, as one of the admixtures used in tile cement mortar, are used to prevent material separation, improve workability, maintain the binding water necessary for cement hardening, and improve adhesion to the substrate.

[0005] However, while thickeners improve sagging resistance and water retention, they have the disadvantage of not extending or even shortening the workable life. Furthermore, increasing the amount used or adding other admixtures to improve workable life improves workability and flowability, but at the expense of reduced sagging resistance.

[0006] In addition, when improving the workable time by adding a hardening retarder, it may cause construction-related disadvantages such as delaying the development of appropriate strength by extending the hardening time of the cement.

[0007] In addition, existing tile adhesives use many compounds harmful to the human body, such as bisphenol-A epoxy resin, acrylic resin, and solvents, so there is a demand for eco-friendly adhesives that are not harmful to the human body.

[0008] [Prior Art Literature]

[0009] [Patent Document]

[0010] Republic of Korea Patent Publication No. 10-1975785

[0011] The purpose of the present invention is to provide an eco-friendly adhesive composition for tiles or floors with excellent durability.

[0012] The purpose of the present invention is to provide an odorless, eco-friendly adhesive composition for tiles or floors.

[0013] The purpose of the present invention is to provide an adhesive composition having excellent adhesive strength and long-term durability even without using epoxy resin or acrylic resin.

[0014] The purposes of the present disclosure are not limited to those mentioned above, and other purposes and advantages of the present disclosure not mentioned above can be understood through the following description and will be more clearly understood through the embodiments of the present disclosure. Furthermore, it will be readily apparent that the purposes and advantages of the present disclosure can be realized by the means and combinations thereof set forth in the claims.

[0015] The present invention provides an adhesive composition for tiles or floors, comprising 5 to 10 parts by weight of a hardener for 100 parts by weight of a subject, wherein the subject comprises 12-hydroxy-9-cis-octadecenoic acid, a plasticizer, titanium dioxide, calcium carbonate having a size of 3 to 10 micrometers, coated calcium carbonate, reinforcing fibers, and talc.

[0016] The above subject matter may include 10 to 30 wt% of 12-hydroxy-9-cis-octadecenoic acid, 1 to 3 wt% of a plasticizer, 0.5 to 2 wt% of titanium dioxide, 10 to 30 wt% of calcium carbonate having a size of 3 to 10 micrometers, 10 to 20 wt% of coated calcium carbonate, 5 to 20 wt% of reinforcing fibers, and 10 to 30 wt% of talc.

[0017] The above reinforcing fiber may be composed of 75 to 96 wt% of one or more synthetic fibers selected from the group consisting of polypropylene (PP) fiber, polyvinyl alcohol (PVA) fiber, nylon fiber, carbon fiber reinforced plastic (CFRP), aramid fiber, and glass fiber, and 4 to 25 wt% of coconut natural fiber.

[0018] The present invention provides an adhesive composition for tiles or floors, comprising 5 to 10 parts by weight of a hardener for 100 parts by weight of a subject, wherein the subject comprises 12-hydroxy-9-cis-octadecenoic acid, quartz, a plasticizer, titanium dioxide, calcium carbonate having a size of 3 to 10 micrometers, coated calcium carbonate, reinforcing fibers, and talc.

[0019] The above floor is preferably an ondol floor.

[0020] The above-mentioned subject matter may include 10 to 30 wt% of 12-hydroxy-9-cis-octadecenoic acid, 5 to 10 wt% of quartz, 1 to 3 wt% of plasticizer, 0.5 to 2 wt% of titanium dioxide, 10 to 30 wt% of calcium carbonate having a size of 3 to 10 micrometers, 10 to 20 wt% of coated calcium carbonate, 5 to 20 wt% of reinforcing fibers, and 10 to 30 wt% of talc.

[0021] The above reinforcing fiber may be composed of 75 to 96 wt% of one or more synthetic fibers selected from the group consisting of polypropylene (PP) fiber, polyvinyl alcohol (PVA) fiber, nylon fiber, carbon fiber reinforced plastic (CFRP), aramid fiber, and glass fiber, and 4 to 25 wt% of polylactic acid natural fiber.

[0022] The present invention provides an eco-friendly adhesive composition for tiles or floors with excellent long-term durability.

[0023] The present invention provides an adhesive composition having excellent adhesive strength and long-term durability even without using epoxy resin or urethane resin.

[0024] (Form 1) Durable, eco-friendly adhesive composition for tiles or floors

[0025] The present invention provides an adhesive composition for tiles or floors, comprising 5 to 10 parts by weight of a hardener for 100 parts by weight of a subject, wherein the subject comprises 12-hydroxy-9-cis-octadecenoic acid, a plasticizer, titanium dioxide, calcium carbonate having a size of 3 to 10 micrometers, coated calcium carbonate, reinforcing fibers, and talc.

[0026] The above subject matter may include 10 to 30 wt% of 12-hydroxy-9-cis-octadecenoic acid, 1 to 3 wt% of a plasticizer, 0.5 to 2 wt% of titanium dioxide, 10 to 30 wt% of calcium carbonate having a size of 3 to 10 micrometers, 10 to 20 wt% of coated calcium carbonate, 5 to 20 wt% of reinforcing fibers, and 10 to 30 wt% of talc.

[0027] The above subject matter may further comprise an antifreeze agent. When further comprising an antifreeze agent, the subject matter may comprise 10 to 30 wt% of 12-hydroxy-9-cis-octadecenoic acid, 5 to 10 wt% of an antifreeze agent, 1 to 3 wt% of a plasticizer, 0.5 to 2 wt% of titanium dioxide, 10 to 30 wt% of calcium carbonate having a size of 3 to 10 micrometers, 10 to 20 wt% of coated calcium carbonate, 5 to 20 wt% of reinforcing fibers, and 10 to 30 wt% of talc.

[0028] The above reinforcing fiber may be composed of 75 to 96 wt% of one or more synthetic fibers selected from the group consisting of polypropylene (PP) fiber, polyvinyl alcohol (PVA) fiber, nylon fiber, carbon fiber reinforced plastic (CFRP), aramid fiber, and glass fiber, and 4 to 25 wt% of coconut natural fiber.

[0029] When synthetic fibers and coconut natural fibers are used in the above weight range, the adhesive strength and long-term durability are excellent.

[0030] The above 12-hydroxy-9-cis-octadecenoic acid is a substance having a structure represented by the following chemical formula 1. The above 12-hydroxy-9-cis-octadecenoic acid is contained in an amount of 10 to 30 wt%, preferably 20 wt%, based on 100 wt% of the main agent. If contained in an amount less than the lower limit, the adhesive effect may be poor, and if contained in an amount exceeding the upper limit, the curing time may be too short. Instead of the above 12-hydroxy-9-cis-octadecenoic acid, a polyol manufactured using 12-hydroxy-9-cis-octadecenoic acid may be used.

[0031] [Chemical Formula 1]

[0032] .

[0033] The above-mentioned antifreeze agent functions as a freeze-prevention agent. Antifreeze agents, along with acrylic dispersions and water-in-oil (W / O) emulsion thickeners with low glass transition temperatures, prevent the tile adhesive from freezing at low temperatures, thereby providing stability to the tile adhesive under low-temperature conditions. Conventional glycol-based agents can be widely used as antifreeze agents, but polypropylene glycol is preferred due to its antifreeze effect and environmental benefits.

[0034] The content of the antifreeze agent may be included at 5 to 10 wt% based on 100 wt% of the main body. If the content exceeds the lower limit, the antifreeze effect is reduced, and if the content exceeds the upper limit, the adhesive strength is deteriorated.

[0035] Plasticizers are additives that reduce viscosity. Examples of plasticizers include 2,2,4-trimethyl-1,3-pentadiol monoisobutyrate (also known as Texanol), dibutyl phthalate, dioctyl terephthalate, or dioctyl phthalate. The plasticizer content may range from 1 to 3 wt% based on 100 wt% of the main composition. If the content exceeds the upper limit, adhesion deteriorates.

[0036] Titanium dioxide is an additive added to increase the whiteness of adhesive compositions and enhance the coloration when adding dyes or pigments to create other colors. It can be included at 0.5 to 2 wt% based on 100 wt% of the main agent. Below the lower limit, the whiteness is excessively low, while above the upper limit, the whiteness is excessively high, potentially causing eye strain.

[0037] Calcium carbonate having a particle size of 3 to 10 micrometers can be used as a filler. Calcium carbonate having a particle size of 3 to 10 micrometers can be included in an amount of 20 to 40 wt% based on 100 wt% of the main body.

[0038] Coated calcium carbonate can be used as a filler. Coated calcium carbonate is calcium carbonate coated with a fatty acid or silica. In particular, when using fatty acid-coated calcium carbonate, the durability of the adhesive composition can be improved, thereby extending its shelf life. The fatty acid is preferably at least one selected from the group consisting of tallow fatty acid, stearic acid, palmitic acid, lauric acid, and oleic acid. The coated calcium carbonate can be included in an amount of 10 to 20 wt% based on 100 wt% of the main body.

[0039] Talc is used as a filler. Talc can be present in an amount of 20 to 40 wt% relative to 100 wt% of the main body. If talc is present in amounts below the lower limit, adhesive strength may be reduced.

[0040] The above-mentioned subject matter can exhibit adhesive strength similar to that of existing epoxy adhesives or urethane adhesives, despite not containing epoxy resin or urethane resin, and is environmentally friendly as it is not harmful to the human body.

[0041] The above curing agent may be an isocyanate-based curing agent. The isocyanate-based curing agent may include at least one selected from hexamethylene diisocyante (HDI), HDI-trimer, methylene diisocyante (MDI), tolune diisocyante (TDI), hydrogenated MDI (H-MDI), isophrone diisocyante (IPDI), and IPDI-trimer. The above curing agent may be included in an amount of 5 to 15 parts by weight, preferably 7 to 12 parts by weight, based on 100 parts by weight of the main agent. If the content of the curing agent is included below the lower limit, problems such as a decrease in adhesive strength and curing properties due to delayed curing of the adhesive may occur, and if the content exceeds the upper limit, adhesive strength and hardness may decrease, and workability may be poor.

[0042] The above adhesive composition for tiles or floors may additionally contain a toner.

[0043] The above adhesive composition for tiles or floors may contain 5 to 10 parts by weight of a hardener and 0.1 to 1 part by weight of a toner per 100 parts by weight of the subject matter.

[0044] The above toner may contain 2 to 10 parts by weight of dye per 90 to 98 parts by weight of polypropylene glycol.

[0045] The above dye may use various known plant materials, and may include a dye extracted from one or more selected from among indigo, chestnut skin, onion skin, cacao, red cabbage, marigold, Chinese chive, gardenia, safflower, licorice, areca nut, safflower, leather tree, sesame, reed, persimmon, clove, lac, mugwort, lotus, logwood, phellodendron, magnolia berry, turmeric, dogwood, oxeye daisy, schisandra chinensis, magnolia, yarrow, Jerusalem artichoke, elm, bamboo, four-leafed bread, sorijaengi, turtletail, hwangsamdengul, dogtooth violet, rhubarb, houttuynia cordata, ginseng, Korean angelica, walnut leaves, and magpie squirrel, and among the above dyes, one or more selected from among the leaves, stems, roots, barks, and fruits of dyeing materials, or a dye sold as a commercial product on the market may be used.

[0046] Instead of the above dye, a pigment may be used, and the pigment is used to sufficiently express the required color, and at least one pigment selected from the group consisting of metal oxides, composite oxides, metal sulfides or metal carbonates, carbon black, titanium black and titanium dioxide, including any one component selected from iron, copper, manganese, cobalt, chromium, nickel, zinc, calcium and silver may be used. The toner may be included in an amount of 0.01 to 1 part by weight based on 100 parts by weight of the main body. If the toner is included in an amount less than the lower limit, a problem may arise in that the color of the toner is difficult to sufficiently express, and if it is included in an amount exceeding the upper limit, a problem may arise in that the physical properties of the adhesive deteriorate due to an excessive amount of pigment added.

[0047] The adhesive composition of the present invention may optionally further include other additives to adjust the physical properties of the adhesive composition. The other additives may include at least one selected from the group consisting of a tackifier, an adhesion promoter, a preservative, an antifoaming agent, a flame retardant, an antistatic agent, and the like, and the types and contents thereof are not particularly limited.

[0048] The viscosity of the subject matter of the present invention may be 10-50,000 ps. If the viscosity is lower than the above range, the adhesive strength is reduced, making it difficult to attach ceramic or polishing tiles before the adhesive hardens. If the viscosity is higher than the above range, the adhesive is applied with force, making construction difficult. Therefore, it is preferable to use it within the above range.

[0049]

[0050] The present invention is described in more detail below through examples and experimental examples. However, these examples and experimental examples are intended to exemplify the present invention and the scope of the present invention is not limited to these examples and experimental examples.

[0051] Example 1

[0052] A subject matter comprising 28 wt% of 12-hydroxy-9-cis-octadecenoic acid, 1.5 wt% of dioctyl terephthalate as a plasticizer, 0.5 wt% of titanium dioxide, 25 wt% of calcium carbonate having a size of 3 to 10 micrometers, 15 wt% of calcium carbonate coated with tallow fatty acid, and 30 wt% of talc is prepared. An adhesive composition is prepared by including 10 wt% of an isocyanate-based curing agent for 100 wt% of the prepared subject matter.

[0053] Example 2

[0054] An adhesive composition is prepared including 28 wt% of 12-hydroxy-9-cis-octadecenoic acid, 1.5 wt% of dioctyl terephthalate as a plasticizer, 0.5 wt% of titanium dioxide, 20 wt% of calcium carbonate having a size of 3 to 10 micrometers, 10 wt% of calcium carbonate coated with tallow fatty acid, 10 wt% of reinforcing fiber, and 20 wt% of talc. An adhesive composition is prepared by including 10 wt% of an isocyanate-based curing agent for 100 wt% of the above-mentioned prepared subject matter.

[0055] The above reinforcing fiber was composed of 25 wt% coconut natural fiber and 75 wt% nylon fiber. The above coconut natural fiber was purchased commercially.

[0056] Example 3

[0057] An adhesive composition is prepared including 28 wt% of 12-hydroxy-9-cis-octadecenoic acid, 1.5 wt% of dioctyl terephthalate as a plasticizer, 0.5 wt% of titanium dioxide, 20 wt% of calcium carbonate having a size of 3 to 10 micrometers, 5 wt% of calcium carbonate coated with tallow fatty acid, 15 wt% of reinforcing fiber, and 20 wt% of talc. An adhesive composition is prepared by including 10 wt% of an isocyanate-based curing agent for 100 wt% of the above-prepared subject matter.

[0058] The above reinforcing fiber was made of 100% nylon fiber by weight.

[0059] Example 4

[0060] An adhesive composition is prepared including 28 wt% of 12-hydroxy-9-cis-octadecenoic acid, 1.5 wt% of dioctyl terephthalate as a plasticizer, 0.5 wt% of titanium dioxide, 20 wt% of calcium carbonate having a size of 3 to 10 micrometers, 5 wt% of calcium carbonate coated with tallow fatty acid, 15 wt% of reinforcing fiber, and 20 wt% of talc. An adhesive composition is prepared by including 10 wt% of an isocyanate-based curing agent for 100 wt% of the above-prepared subject matter.

[0061] The above reinforcing fiber was made of 100% coconut natural fiber by weight. The coconut natural fiber used was commercially purchased coconut natural fiber.

[0062] Example 5

[0063] An adhesive composition is prepared including 20 wt% of 12-hydroxy-9-cis-octadecenoic acid, 8 wt% of polypropylene glycol as an antifreeze agent, 1.5 wt% of dioctyl terephthalate as a plasticizer, 0.5 wt% of titanium dioxide, 20 wt% of calcium carbonate having a size of 3 to 10 micrometers, 10 wt% of silica-coated calcium carbonate, 10 wt% of reinforcing fiber, and 20 wt% of talc. An adhesive composition is prepared by including 10 wt% of an isocyanate-based curing agent for 100 wt% of the above-mentioned prepared subject matter.

[0064] The above reinforcing fiber was composed of 25 wt% coconut natural fiber and 75 wt% nylon fiber. The above coconut natural fiber was purchased commercially.

[0065] Comparative Example 1

[0066] An epoxy adhesive is prepared containing 30 parts by weight of polyurethane resin, 1 part by weight of silane coupling agent, 50 parts by weight of talc, and 10 parts by weight of amide curing agent for 100 parts by weight of epoxy resin.

[0067] Experimental Example 1: Adhesive Strength

[0068] The adhesive strength of the adhesive compositions of the above examples and comparative examples was measured according to KS L 1953:2000.

[0069]

[0070] As described in the table above, the adhesive composition of the present invention was confirmed to have adhesive strength similar to that of a urethane-epoxy adhesive, even without the addition of a urethane resin or epoxy resin. Furthermore, it was confirmed that excellent adhesive strength was achieved when coconut natural fiber and nylon fiber were used together as reinforcing fibers.

[0071] Experimental Example 2: Adhesive strength after long-term use

[0072] The rate of change in adhesive strength 3 months after applying the adhesive compositions of the above examples and comparative examples was measured.

[0073]

[0074] As shown in the table above, the adhesive composition of the present invention was confirmed to exhibit a low rate of change in adhesive strength even after long-term storage. In particular, the rate of change was confirmed to be low when coconut natural fiber and nylon fiber were used together as reinforcing fibers.

[0075] (2nd form) Odorless, eco-friendly adhesive composition for tiles or floors

[0076] The present invention provides an adhesive composition for tiles or floors, comprising 5 to 10 parts by weight of a hardener for 100 parts by weight of a subject, wherein the subject comprises 12-hydroxy-9-cis-octadecenoic acid, quartz, a plasticizer, titanium dioxide, calcium carbonate having a size of 3 to 10 micrometers, coated calcium carbonate, reinforcing fibers, and talc.

[0077] The present invention provides an adhesive composition for tiles or floors, which comprises 5 to 10 parts by weight of a hardener for 100 parts by weight of a subject, wherein the subject comprises 12-hydroxy-9-cis-octadecenoic acid, quartz, a plasticizer, titanium dioxide, calcium carbonate having a size of 3 to 10 micrometers, coated calcium carbonate, reinforcing fibers, and talc, and does not contain an epoxy resin or a urethane resin.

[0078] The above-mentioned subject matter may include 10 to 30 wt% of 12-hydroxy-9-cis-octadecenoic acid, 5 to 10 wt% of quartz, 1 to 3 wt% of plasticizer, 0.5 to 2 wt% of titanium dioxide, 10 to 30 wt% of calcium carbonate having a size of 3 to 10 micrometers, 10 to 20 wt% of coated calcium carbonate, 5 to 20 wt% of reinforcing fibers, and 10 to 30 wt% of talc.

[0079] The above subject matter may further comprise an antifreeze agent. When further comprising an antifreeze agent, the subject matter may comprise 10 to 30 wt% of 12-hydroxy-9-cis-octadecenoic acid, 5 to 10 wt% of quartz, 3 to 5 wt% of an antifreeze agent, 1 to 3 wt% of a plasticizer, 0.5 to 2 wt% of titanium dioxide, 10 to 30 wt% of calcium carbonate having a size of 3 to 10 micrometers, 10 to 20 wt% of coated calcium carbonate, 5 to 20 wt% of reinforcing fibers, and 10 to 30 wt% of talc.

[0080] The above reinforcing fiber may be composed of 75 to 96 wt% of one or more synthetic fibers selected from the group consisting of polypropylene (PP) fiber, polyvinyl alcohol (PVA) fiber, nylon fiber, carbon fiber reinforced plastic (CFRP), aramid fiber, and glass fiber, and 4 to 25 wt% of polylactic acid natural fiber.

[0081] When synthetic fibers and polylactic acid natural fibers are used within the above weight range, the adhesive strength and long-term durability are excellent.

[0082] The above polylactic acid natural fiber is a natural fiber manufactured by polymerizing lactic acid obtained through microbial fermentation and extraction from crops such as corn and cassava. Commercially available polylactic acid fibers can be used in the present invention.

[0083] The above-mentioned macbanseok is 1cm 3 It is a porous material with 30,000 to 150,000 pores per minute, and has excellent adsorption properties, so it has the function of adsorbing and removing harmful substances such as odors, fine dust, and heavy metals. In particular, it has the function of preventing dust from getting caught in the pores and interfering with the curing of the adhesive in dusty environments. In the present invention, the makbanseok has the function of specifically removing the odor of the adhesive.

[0084] It is preferable that the above-mentioned quartzite has a particle size of 500 mesh and does not contain heavy metals.

[0085] The above 12-hydroxy-9-cis-octadecenoic acid is a substance having a structure represented by the following chemical formula 1. The above 12-hydroxy-9-cis-octadecenoic acid is contained in an amount of 10 to 30 wt%, preferably 20 wt%, based on 100 wt% of the main agent. If contained in an amount less than the lower limit, the adhesive effect may be poor, and if contained in an amount exceeding the upper limit, the curing time may be too short. Instead of the above 12-hydroxy-9-cis-octadecenoic acid, a polyol manufactured using 12-hydroxy-9-cis-octadecenoic acid may be used.

[0086] [Chemical Formula 1]

[0087] .

[0088] The above-mentioned antifreeze agent functions as a freeze-prevention agent. Antifreeze agents, along with acrylic dispersions and water-in-oil (W / O) emulsion thickeners with low glass transition temperatures, prevent the tile adhesive from freezing at low temperatures, thereby providing stability to the tile adhesive under low-temperature conditions. Conventional glycol-based agents can be widely used as antifreeze agents, but polypropylene glycol is preferred due to its antifreeze effect and environmental benefits.

[0089] The antifreeze agent may be included in an amount of 3 to 5 wt% based on 100 wt% of the main body. If the amount exceeds the lower limit, the antifreeze effect is reduced, and if the amount exceeds the upper limit, the adhesive strength is deteriorated.

[0090] Plasticizers are additives that reduce viscosity. Examples of plasticizers include 2,2,4-trimethyl-1,3-pentadiol monoisobutyrate (also known as Texanol), dibutyl phthalate, dioctyl terephthalate, or dioctyl phthalate. The plasticizer content may range from 1 to 3 wt% based on 100 wt% of the main composition. If the content exceeds the upper limit, adhesion deteriorates.

[0091] Titanium dioxide is an additive added to increase the whiteness of adhesive compositions and enhance the coloration when adding dyes or pigments to create other colors. It can be included at 0.5 to 2 wt% based on 100 wt% of the main agent. Below the lower limit, the whiteness is excessively low, while above the upper limit, the whiteness is excessively high, potentially causing eye strain.

[0092] Calcium carbonate having a particle size of 3 to 10 micrometers can be used as a filler. Calcium carbonate having a particle size of 3 to 10 micrometers can be included in an amount of 20 to 40 wt% based on 100 wt% of the main body.

[0093] Coated calcium carbonate can be used as a filler. Coated calcium carbonate is calcium carbonate coated with a fatty acid or silica. In particular, when using fatty acid-coated calcium carbonate, the durability of the adhesive composition can be improved, thereby extending its shelf life. The fatty acid is preferably at least one selected from the group consisting of tallow fatty acid, stearic acid, palmitic acid, lauric acid, and oleic acid. The coated calcium carbonate can be included in an amount of 10 to 20 wt% based on 100 wt% of the main body.

[0094] Talc is used as a filler. Talc can be included in amounts of 20 to 40 wt% based on 100 wt% of the main body. If talc is included below the lower limit, adhesive strength may be reduced.

[0095] The above-mentioned subject matter can exhibit adhesive strength similar to that of existing epoxy adhesives or urethane adhesives, despite not containing epoxy resin or urethane resin, and is environmentally friendly as it is not harmful to the human body.

[0096] The above curing agent may be an isocyanate-based curing agent. The isocyanate-based curing agent may include at least one selected from hexamethylene diisocyante (HDI), HDI-trimer, methylene diisocyante (MDI), tolune diisocyante (TDI), hydrogenated MDI (H-MDI), isophrone diisocyante (IPDI), and IPDI-trimer. The above curing agent may be included in an amount of 5 to 15 parts by weight, preferably 7 to 12 parts by weight, based on 100 parts by weight of the main agent. If the content of the curing agent is included below the lower limit, problems such as a decrease in adhesive strength and curing properties due to delayed curing of the adhesive may occur, and if the content exceeds the upper limit, adhesive strength and hardness may decrease, and workability may be poor.

[0097] The above adhesive composition for tiles or floors may additionally contain a toner.

[0098] The above adhesive composition for tiles or floors may contain 5 to 10 parts by weight of a hardener and 0.1 to 1 part by weight of a toner per 100 parts by weight of the subject matter.

[0099] The above toner may contain 2 to 10 parts by weight of dye per 90 to 98 parts by weight of polypropylene glycol.

[0100] The above dye may use various known plant materials, and may include a dye extracted from one or more selected from among indigo, chestnut skin, onion skin, cacao, red cabbage, marigold, Chinese chive, gardenia, safflower, licorice, areca nut, safflower, leather tree, sesame, reed, persimmon, clove, lac, mugwort, lotus, logwood, phellodendron, magnolia berry, turmeric, dogwood, oxeye daisy, schisandra chinensis, magnolia, yarrow, Jerusalem artichoke, elm, bamboo, four-leafed bread, sorijaengi, turtletail, hwangsamdengul, dogtooth violet, rhubarb, houttuynia cordata, ginseng, Korean angelica, walnut leaves, and magpie squirrel, and among the above dyes, one or more selected from among the leaves, stems, roots, barks, and fruits of dyeing materials, or a dye sold as a commercial product on the market may be used.

[0101] Instead of the above dye, a pigment may be used, and the pigment is used to sufficiently express the desired color, and at least one pigment selected from the group consisting of metal oxides, composite oxides, metal sulfides or metal carbonates, carbon black, titanium black and titanium dioxide containing any one component selected from iron, copper, manganese, cobalt, chromium, nickel, zinc, calcium and silver may be used.

[0102] The above toner may be included in an amount of 0.01 to 1 part by weight per 100 parts by weight of the subject matter. If the toner is included in an amount less than the lower limit, a problem may arise in which the color of the toner is not sufficiently expressed, and if the toner is included in an amount exceeding the upper limit, a problem may arise in which the physical properties of the adhesive deteriorate due to an excessive amount of pigment added.

[0103] The adhesive composition of the present invention may optionally further include other additives to adjust the physical properties of the adhesive composition. The other additives may include at least one selected from the group consisting of a tackifier, an adhesion promoter, a preservative, an antifoaming agent, a flame retardant, an antistatic agent, and the like, and the types and contents thereof are not particularly limited.

[0104] The viscosity of the subject matter of the present invention may be 10-50,000 ps. If the viscosity is lower than the above range, the adhesive strength is reduced, making it difficult to attach ceramic or polishing tiles before the adhesive hardens. If the viscosity is higher than the above range, the adhesive is applied with force, making construction difficult. Therefore, it is preferable to use it within the above range.

[0105]

[0106] The present invention is described in more detail below through examples and experimental examples. However, these examples and experimental examples are intended to exemplify the present invention and the scope of the present invention is not limited to these examples and experimental examples.

[0107] Example 1

[0108] A subject matter is prepared including 23 wt% of 12-hydroxy-9-cis-octadecenoic acid, 5 wt% of quartz, 1.5 wt% of dioctyl terephthalate as a plasticizer, 0.5 wt% of titanium dioxide, 25 wt% of calcium carbonate having a size of 3 to 10 micrometers, 15 wt% of calcium carbonate coated with tallow fatty acid, and 30 wt% of talc. An adhesive composition is prepared by including 10 wt% of an isocyanate-based curing agent for 100 wt% of the prepared subject matter.

[0109] Example 2

[0110] An adhesive composition is prepared including 23 wt% of 12-hydroxy-9-cis-octadecenoic acid, 5 wt% of quartz, 1.5 wt% of dioctyl terephthalate as a plasticizer, 0.5 wt% of titanium dioxide, 20 wt% of calcium carbonate having a size of 3 to 10 micrometers, 10 wt% of calcium carbonate coated with tallow fatty acid, 10 wt% of reinforcing fiber, and 20 wt% of talc. An adhesive composition is prepared by including 10 wt% of an isocyanate-based curing agent for 100 wt% of the prepared subject matter.

[0111] The above reinforcing fiber was composed of 25 wt% polylactic acid natural fiber and 75 wt% nylon fiber. The above polylactic acid natural fiber was a commercially available polylactic acid natural fiber.

[0112] Example 3

[0113] An adhesive composition is prepared including 23 wt% of 12-hydroxy-9-cis-octadecenoic acid, 5 wt% of quartz, 1.5 wt% of dioctyl terephthalate as a plasticizer, 0.5 wt% of titanium dioxide, 20 wt% of calcium carbonate having a size of 3 to 10 micrometers, 10 wt% of calcium carbonate coated with tallow fatty acid, 10 wt% of reinforcing fiber, and 20 wt% of talc. An adhesive composition is prepared by including 10 wt% of an isocyanate-based curing agent for 100 wt% of the prepared subject matter.

[0114] The above reinforcing fiber was composed of 25 wt% polylactic acid natural fiber and 75 wt% nylon fiber. The above polylactic acid natural fiber was a commercially available polylactic acid natural fiber.

[0115] Example 4

[0116] An adhesive composition is prepared including 23 wt% of 12-hydroxy-9-cis-octadecenoic acid, 5 wt% of quartz, 1.5 wt% of dioctyl terephthalate as a plasticizer, 0.5 wt% of titanium dioxide, 20 wt% of calcium carbonate having a size of 3 to 10 micrometers, 5 wt% of calcium carbonate coated with tallow fatty acid, 15 wt% of reinforcing fiber, and 20 wt% of talc. An adhesive composition is prepared by including 10 wt% of an isocyanate-based curing agent for 100 wt% of the prepared subject matter.

[0117] The above reinforcing fiber was made of 100% nylon fiber by weight.

[0118] Example 5

[0119] An adhesive composition is prepared including 23 wt% of 12-hydroxy-9-cis-octadecenoic acid, 5 wt% of quartz, 1.5 wt% of dioctyl terephthalate as a plasticizer, 0.5 wt% of titanium dioxide, 20 wt% of calcium carbonate having a size of 3 to 10 micrometers, 5 wt% of calcium carbonate coated with tallow fatty acid, 15 wt% of reinforcing fiber, and 20 wt% of talc. An adhesive composition is prepared by including 10 wt% of an isocyanate-based curing agent for 100 wt% of the prepared subject matter.

[0120] The above reinforcing fiber was composed of 100% by weight of polylactic acid natural fiber. The above polylactic acid natural fiber was a commercially available polylactic acid natural fiber.

[0121] Example 6

[0122] An adhesive composition is prepared including 20 wt% of 12-hydroxy-9-cis-octadecenoic acid, 5 wt% of quartz, 3 wt% of polypropylene glycol as an antifreeze, 1.5 wt% of dioctyl terephthalate as a plasticizer, 0.5 wt% of titanium dioxide, 20 wt% of calcium carbonate having a size of 3 to 10 micrometers, 10 wt% of calcium carbonate coated with fatty acid, 10 wt% of reinforcing fiber, and 20 wt% of talc. An adhesive composition is prepared by including 10 wt% of an isocyanate-based curing agent for 100 wt% of the above-prepared main agent.

[0123] The above reinforcing fiber was composed of 25 wt% polylactic acid natural fiber and 75 wt% nylon fiber. The above polylactic acid natural fiber was a commercially available polylactic acid natural fiber.

[0124] Example 7

[0125] An adhesive composition is prepared including 23 wt% of 12-hydroxy-9-cis-octadecenoic acid, 5 wt% of quartz, 1.5 wt% of dioctyl terephthalate as a plasticizer, 0.5 wt% of titanium dioxide, 20 wt% of calcium carbonate having a size of 3 to 10 micrometers, 10 wt% of silica-coated calcium carbonate, 10 wt% of reinforcing fiber, and 20 wt% of talc. An adhesive composition is prepared by including 10 wt% of an isocyanate-based curing agent for 100 wt% of the above-mentioned prepared subject matter.

[0126] The above reinforcing fiber was composed of 25 wt% polylactic acid natural fiber and 75 wt% nylon fiber. The above polylactic acid natural fiber was a commercially available polylactic acid natural fiber.

[0127] Comparative Example 1

[0128] An epoxy adhesive is prepared containing 30 parts by weight of polyurethane resin, 1 part by weight of silane coupling agent, 50 parts by weight of talc, and 10 parts by weight of amide curing agent for 100 parts by weight of epoxy resin.

[0129] Experimental Example 1: Adhesive Strength

[0130] The adhesive strength of the adhesive compositions of the above examples and comparative examples was measured according to KS L 1953:2000.

[0131]

[0132] As described in the table above, the adhesive composition of the present invention was confirmed to have adhesive strength similar to that of a urethane-epoxy adhesive, even without the addition of a urethane resin or epoxy resin. Furthermore, it was confirmed that excellent adhesive strength was achieved when polylactic acid natural fiber and nylon fiber were used together as reinforcing fibers.

[0133] Experimental Example 2: Adhesive strength after long-term use

[0134] The rate of change in adhesive strength 3 months after applying the adhesive compositions of the above examples and comparative examples was measured.

[0135]

[0136] As shown in the table above, it was confirmed that the adhesive composition of the present invention had a low rate of change in adhesive strength even after long-term storage. In particular, it was confirmed that the rate of change was low when polylactic acid natural fiber and nylon fiber were used together as reinforcing fibers. Experimental Example 3: Odor Evaluation of Adhesive After applying the adhesive compositions of the above examples and comparative examples, the odor was sensory evaluated on the applied surface according to the period of time. The sensory evaluation was ◎: no odor at all; ○: no odor; △: slight odor; X: strong odor.

[0137]

[0138] As shown in the table above, it was confirmed that the adhesive composition of the present invention produces less odor.

Claims

1. For 100 parts by weight of the subject matter, it contains 5 to 15 parts by weight of the hardener. An adhesive composition for tiles or floors, wherein the subject matter comprises 12-hydroxy-9-cis-octadecenoic acid, a plasticizer, titanium dioxide, calcium carbonate having a size of 3 to 10 micrometers, coated calcium carbonate, reinforcing fibers and talc.

2. In paragraph 1, An adhesive composition for tiles or floors, comprising 10 to 30 wt% of 12-hydroxy-9-cis-octadecenoic acid, 1 to 3 wt% of a plasticizer, 0.5 to 2 wt% of titanium dioxide, 10 to 30 wt% of calcium carbonate having a size of 3 to 10 micrometers, 10 to 20 wt% of coated calcium carbonate, 5 to 20 wt% of reinforcing fibers, and 10 to 30 wt% of talc.

3. In paragraph 2, An adhesive composition for tiles or floors, wherein the reinforcing fibers comprise 75 to 96 wt% of at least one synthetic fiber selected from the group consisting of polypropylene (PP) fibers, polyvinyl alcohol (PVA) fibers, nylon fibers, carbon fiber reinforced plastics (CFRP), aramid fibers, and glass fibers, and 4 to 25 wt% of coconut natural fibers.

4. For 100 parts by weight of the subject, it contains 5 to 15 parts by weight of hardener. An adhesive composition for tiles or floors, wherein the above-mentioned subject matter comprises 12-hydroxy-9-cis-octadecenoic acid, talc, a plasticizer, titanium dioxide, calcium carbonate having a size of 3 to 10 micrometers, coated calcium carbonate, reinforcing fibers and talc.

5. In paragraph 4, An adhesive composition for tiles or floors, comprising 10 to 30 wt% of 12-hydroxy-9-cis-octadecenoic acid, 5 to 10 wt% of feldspar, 1 to 3 wt% of a plasticizer, 0.5 to 2 wt% of titanium dioxide, 10 to 30 wt% of calcium carbonate having a size of 3 to 10 micrometers, 10 to 20 wt% of coated calcium carbonate, 5 to 20 wt% of reinforcing fibers, and 10 to 30 wt% of talc.

6. In paragraph 5, An adhesive composition for tiles or floors, wherein the reinforcing fibers comprise 75 to 96 wt% of at least one synthetic fiber selected from the group consisting of polypropylene (PP) fibers, polyvinyl alcohol (PVA) fibers, nylon fibers, carbon fiber reinforced plastics (CFRP), aramid fibers, and glass fibers, and 4 to 25 wt% of polylactic acid natural fibers.

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