KR102515906B1 - Polyurethane type adhesive for tile and Tile construction method using the same - Google Patents

Abstract

The present invention relates to an adhesive used for tile construction, and more specifically, to an adhesive for a tile, which has excellent adhesion to various types of tiles with respect to a general concrete construction surface as well as to a waterproof construction surface, which does not essentially require primer construction and/or sand construction and does not use a solvent to be environmentally friendly, and a tile construction method using the same.

Description

Two-component polyurethane adhesive for tile and tile construction method using the same {Polyurethane type adhesive for tile and Tile construction method using the same}

The present invention relates to a two-component polyurethane-based adhesive used for various tile constructions such as ceramic tiles, porcelain tiles, stone tiles, polishing tiles, etc., on not only concrete surfaces but also waterproof surfaces such as waterproof paint, and tile construction using the same. it's about

In general, the interior waterproofing construction of a building consists of primer construction and silica construction after non-exposure (non-tar) waterproof paint construction. After that, the tiles are attached using an epoxy-based tile adhesive. More specifically, for waterproofing inside the building, non-exposure (non-tar) urethane waterproofing paint is applied, primer is applied, and sand or silica is applied. Two additional processes are used, and tile construction is performed using an epoxy adhesive for attaching construction.

The waterproof construction is to prevent the penetration of water into the building, and urethane-based waterproof construction is essential. However, due to the urethane-based waterproof construction, primer construction and sand (silica) construction are absolutely essential, and at this time, tiles are attached using tile adhesive for epoxy during anchoring construction. In addition, during compression construction, tiles are attached using water-soluble acrylic (eg, Cerafix), but water, a solvent of water-soluble acrylic adhesive, does not evaporate, resulting in poor construction in which tiles are detached. In order to prevent this, since adhesion is incomplete on the surface with urethane-based waterproofing or primer and sand (silica) construction must be performed in advance, the work time for preparing for tile adhesion construction increases or the construction cost increases due to additional costs. There is a problem being

In addition, in the case of epoxy-based tile adhesion, it causes serious human damage such as unpleasant odors caused by the use of amine-based raw materials and solvents in the hardener, worker's allergy, rash, and user's atopy. This causes danger to the body and additional costs due to defect repair.

Therefore, solvent-free eco-friendly products, tile adhesives that do not require primer construction and sand (silica) construction are required in bathrooms, swimming pools, bathhouses, and other places where water is used and other indoor areas.

Korean Registered Patent No. 10-2262117 (Announcement Date 2021.06.09.) Korean Registered Patent No. 10-1030375 (Announcement date 2011.04.20.) Korean Registered Patent No. 10-1964008 (Announcement date 2019.04.01.)

The present invention is intended to provide an eco-friendly polyurethane-based adhesive for tiles that does not use a solvent and a tile construction method using the same, while solving the problem of deterioration in the adhesion of existing tile adhesives while eliminating primer application and/or sand application. .

The present invention for solving the above problems includes a subject and a curing agent, wherein the subject is a two-component polyurethane-based adhesive for tiles containing polypropylene glycol, polyethylene glycol, a chain extender, non-asbestos talc, inorganic pigment and calcium carbonate is in providing

In addition, another object of the present invention is to provide a tile construction method using the polyurethane-based adhesive.

The adhesive of the present invention has excellent adhesion to tile surfaces under various conditions, such as ceramic tiles, porcelain tiles, stone tiles, polishing tiles, etc. It is an eco-friendly adhesive with excellent performance and curing properties, does not contain organic solvents, and has 0.00% TVOC. In addition, the adhesive of the present invention has elasticity, so it has excellent resistance to tile cracking and bursting due to distortion of the structure.

1 is a photograph taken in a state in which the two-component polyurethane adhesive prepared in Example 1 is packaged.

Hereinafter, the adhesive for tiles of the present invention will be described in more detail.

The adhesive of the present invention is a polyurethane-based adhesive, and is a solvent-free, two-component polyurethane-based adhesive that does not use a solvent.

The adhesive of the present invention has elasticity while securing a longer pot life than the epoxy-based tile adhesive, so it can perform excellent adhesion work against bursting and collapse of the attached tile, and primer application and/or silica during tile construction with the adhesive of the present invention Since the construction is not essential, the effect of shortening the construction period and reducing costs can be obtained.

The adhesive of the present invention includes a main agent and a curing agent, and may further include a colorant.

The subject includes polypropylene glycol, polyethylene glycol, chain extenders, non-asbestos talc, inorganic pigments and calcium carbonate.

Among the main components, the polypropylene glycol serves to increase the physical properties of the adhesive, and has a weight average molecular weight of 400 to 4,000, preferably a weight average molecular weight of 1,000 to 3,500, more preferably a weight average molecular weight of 1,500 to 3,000 can be used At this time, if the weight average molecular weight of the polypropylene glycol is less than 400, the adhesive may crack and the adhesive curing speed may be too fast, and if the weight average molecular weight exceeds 4,000, the curing speed may be too slow or the strength of the adhesive force Since it may decrease, it is preferable to use polypropylene glycol in the above weight average molecular weight range.

In addition, the content of polypropylene glycol in the main body is preferably 8 to 20% by weight, preferably 10 to 18% by weight, more preferably 10 to 16% by weight, based on the total weight% of the main body. At this time, the polypropylene glycol content If it is less than 8% by weight, the adhesive may crack and the adhesive curing speed may be too fast, and if it is used in excess of 20% by weight, the adhesive strength of the adhesive may deteriorate, so it is recommended to use it within the above range.

Among the main components, the polyethylene glycol serves to increase the physical properties of the adhesive, for example, elongation and elasticity, and the polyethylene glycol has a weight average molecular weight of 500 to 3,000, preferably a weight average molecular weight of 800 to 2,500, More preferably, it is good to use a weight average molecular weight of 800 to 2,000. At this time, when the weight average molecular weight of the polyethylene glycol is less than 500, the elongation of the adhesive may be low and the elasticity may be insufficient, and when the weight average molecular weight exceeds 3,000, the elongation may be too high and the strength of the adhesive force may decrease. Weight within the above range It is better to use one with an average molecular weight.

In addition, the content of polyethylene glycol in the main body is preferably 10 to 30% by weight, preferably 14 to 25% by weight, more preferably 16 to 23% by weight, based on the total weight of the main body. At this time, the polyethylene glycol content is 10 If it is less than 30% by weight, the elongation and elasticity of the cured adhesive are not good, and if it is used in excess of 30% by weight, the adhesive strength of the adhesive may deteriorate, so it is recommended to use it within the above range.

Among the main components, the chain extender may include at least one selected from propylene glycol and ethylene glycol, and preferably may include two types of ethylene glycol and propylene glycol in a weight ratio of 1:20 to 40.

In addition, the content of the chain extender in the main subject may include 10 to 20% by weight, preferably 10 to 18% by weight, more preferably 11 to 15% by weight, based on the total weight of the main subject. If the content is less than 10% by weight, there may be a problem that the elongation and softness of the coating film may decrease, and if the content of the chain extender exceeds 20% by weight, there may be a problem in that the coating film is too soft, so it is recommended to use it within the above range. .

Among the main components, the non-asbestos-type talc serves as a filler and a toughness aid, and may comprise 20 to 40% by weight, preferably 25 to 35% by weight, and more preferably 25 to 30% by weight, based on the total weight of the main material. At this time, if the non-asbestos-type talc content is less than 20% by weight, there may be a problem that the toughness may decrease, and if the non-asbestos-type talc content exceeds 40% by weight, the hardness of the coating film may tend to decrease There may be problems, so it is good to use it within the above range.

As the inorganic pigment among the main components, general inorganic pigments used in the art may be used. For example, white inorganic pigments, yellow inorganic pigments, green inorganic pigments, and/or red inorganic pigments may be used. And, for a more preferable example, TiO ₂ , it may include at least one selected from iron oxide yellow and iron oxide red.

In addition, the content of the inorganic pigment in the main subject may include 1 to 10% by weight, preferably 1 to 5% by weight, more preferably 1 to 3% by weight, based on the total weight% of the main subject. At this time, the content of the inorganic pigment is If it is less than 1% by weight, there may be a problem of reduced coloration, and if the content of the inorganic pigment exceeds 10% by weight, there may be a problem of increased coloration and product price, so it is good to use it within the above range.

Among the main components, the calcium carbonate serves as a filler together with non-asbestos-type talc, and the remaining amount of 100% by weight of the composition is used in addition to the previously described main composition, preferably 30 to 50% by weight, more It may preferably include 35 to 45% by weight, and even more preferably 35 to 40% by weight. At this time, if the calcium carbonate content is less than 35% by weight, the coating film may be formed too softly, and the calcium carbonate content is 45% by weight If the percentage is exceeded, it is recommended to use it within the above range because it may not function as a coating film, and there may be problems with crumbly and no elongation.

The present invention is a two-component adhesive, which includes a curing agent in addition to the above-mentioned main agent, and is used by mixing the main agent and the curing agent before tile construction. In addition, the amount of the curing agent is 7.0 to 12.0 parts by weight of the curing agent, preferably 7.5 to 10.0 parts by weight of the curing agent, more preferably 7.5 to 9.0 parts by weight, based on 100 parts by weight of the main agent. At this time, if the amount of the curing agent is less than 7.0 parts by weight, the curing speed of the adhesive may be too slow or the tile may not adhere well to the construction surface. There may be a falling problem.

In addition, the curing agent may include an isocyanate-based compound in a balance of 50 to 60% by weight and 100% by weight of polyalkylene glycol.

Among the curing agent components, poly(C ₂ ~ C ₈ alkylene) glycol may be used as the polyalkylene glycol, preferably poly(C ₄ ~ C ₇ alkylene) glycol, more preferably poly(n -Butylene) glycol, poly(2-methylene-propylene) glycol, poly(n-pentylene) glycol, poly(2-methylene-butylene) glycol, poly(n-hexylene) glycol, poly(2-methyl) - at least one selected from pentylene) glycol and poly(3-methyl-pentylene) glycol.

And, the content of polyalkylene glycol may be 50 to 60% by weight, preferably 52 to 58% by weight, based on the total weight% of the curing agent. At this time, if the polyalkylene glycol content is less than 50% by weight, there may be a problem that elongation decreases and the coating film becomes stronger, and if the polyalkylene glycol content exceeds 60% by weight, the isocyanate content is relatively small, so the adhesive strength of the adhesive is reduced. There may be problems with reduction.

In addition, the isocyanate compound of the curing agent component is HDI (Hexamethylene diisocyante), HDI-trimer (HDI-trimer), MDI (Methylene diisocyante), TDI (Tolune diisocyante), H-MDI (hydrogenated MDI), IPDI (Isophrone diisocyante) and One or more selected IPDI-trimers may be included, and preferably, one or more selected from MDI, TDI, and H-MDI may be included.

In addition, the content of the isocyanate compound is the remaining weight% of the total weight% of the curing agent excluding the polyalkylene glycol.

The two-component polyurethane-based adhesive of the present invention may be prepared by further mixing a colorant in addition to the above-described main agent and curing agent in order to increase marketability. In this case, as the colorant, general colorants used in the art may be used, and for example, one or more selected from inorganic pigments, organic pigments, and dyes may be used as the colorant.

The amount of the colorant is preferably used within the range of not degrading the physical properties of the adhesive of the present invention, and is 0.10 to 1.00 parts by weight, preferably 0.15 to 0.80 parts by weight, more preferably 0.15 to 0.15 parts by weight, based on 100 parts by weight of the main agent. It is appropriate to use about 0.65 parts by weight.

When measured in accordance with KS L 1593:2020, the non-formulation, two-component polyurethane adhesive of the present invention has a standard adhesive strength of 0.9 N/mm ² or more, a hot water adhesive strength of 0.25 N/mm ² or more, and a heat aging adhesive strength of 1.0 N/mm 2 . mm ² or more, low-temperature curing adhesive strength of 0.50 N/mm ² or more and alkaline water adhesive strength of 0.40 N/mm 2 or more, preferably standard adhesive strength of 1.0 to 1.3 N/ ^{mm 2 ,} hot water adhesive strength of 0.27 to 0.70 N/mm ² or more, heat aging adhesive strength of 1.0 to 1.3 N/mm ² , low temperature curing adhesive strength of 0.54 to 0.85 N/mm ² and adhesive strength in alkaline water of 0.42 to 0.75 N/mm ² may be satisfied.

The adhesive of the present invention having such excellent adhesive strength has excellent adhesive strength to various tiles such as ceramic tiles, porcelain tiles, stone tiles, polishing tiles, and the like, and also to waterproof-treated construction surfaces such as waterproof paint as well as general concrete construction surfaces. It also has high adhesion to cotton. In addition, in the present invention, when performing tile construction with an adhesive, primer construction and/or sand construction are not essential, and the adhesive of the present invention provides high workability for tile attachment construction, tile compression construction, or tile attachment compression construction. can be done

Hereinafter, the present invention will be described in more detail through examples. However, the present invention should not be construed as being limited by the examples disclosed below, and the following examples are intended to aid understanding of the present invention.

[Example]

Example 1: Preparation of a non-formulation, two-component polyurethane adhesive

(1) subject manufacturing

Chain extension containing 12.0% by weight of polypropylene glycol (PPG) with a weight average molecular weight (Mw) of 2,000, 18.0% by weight of polyethylene glycol (PEG) with a weight average molecular weight (Mw) of 1,000, ethylene glycol and propylene glycol at a weight ratio of 1:30 A mixture of 13.5% by weight of a non-asbestos type talc (trade name: KC-2000), 24.0% by weight of TiO ₂ (inorganic pigment, trade name: NA-100), and 28.5% by weight of calcium carbonate (trade name: KC-2000) and stirred to prepare a subject.

(2) Preparation of curing agent

A curing agent was prepared by mixing 55% by weight of poly(2-methyl-propylene) glycol and 45% by weight of hydrogenated MDI (H-MDI), an isocyanate.

(3) Manufacture of colorants

As a colorant, a colorant was prepared by mixing 98% by weight of a plasticizer (trade name OC-100) and 2% by weight of a dye (trade name RED-23).

After individually packing the main agent, curing agent, and coloring agent in a 7L container, the container was closed with a lid. Their packaging content was 7.96 parts by weight of the curing agent and 0.19 part by weight of the colorant based on 100 parts by weight of the main agent. A photograph of the prepared two-component adhesive packaging is shown in FIG. 1 .

Example 2

In the same manner as in Example 1, the main agent, curing agent, and coloring agent were individually packaged to prepare an adhesive, but among the main components, polypropylene glycol having a weight average molecular weight of about 3,000 was used.

Example 3

In the same manner as in Example 1, the main agent, the curing agent, and the coloring agent were individually packaged to prepare an adhesive, but among the main components, polyethylene glycol having a weight average molecular weight of about 2,500 was used.

Examples 4 to 7

In the same manner as in Example 1, the main agent, curing agent, and colorant were individually packaged to prepare an adhesive, but Examples 4 to 7 were carried out by varying the content of polypropylene glycol or polyethylene glycol in the main component.

Comparative Example 1

In the same manner as in Example 1, the main agent, curing agent, and colorant were individually packaged to prepare an adhesive, but among the main components, polypropylene glycol having a weight average molecular weight of about 4.500 was used.

Comparative Example 2

In the same manner as in Example 1, the main agent, curing agent and coloring agent were individually packaged to prepare an adhesive, but among the main components, polyethylene glycol having a weight average molecular weight of about 3,500 was used.

Comparative Examples 3 to 6

In the same manner as in Example 1, each of the main agent, curing agent, and coloring agent were individually packaged to prepare an adhesive, but Comparative Examples 3 to 6 were carried out by varying the content of polypropylene glycol or polyethylene glycol in the main component.

division Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 PPG 12.0
(Mw=2,000) 12.0
(Mw=3,000) 12.0
(Mw=2,000) 9.0 18.0 12.0 12.0 PEG 18.0
(Mw=1,000) 18.0
(Mw=1,000) 18.0
(Mw=2,500) 18.0 18.0 13.0 26.0 inorganic pigment 4.0 4.0 4.0 4.0 4.0 4.0 4.0 non-asbestos talc 24.0 24.0 24.0 24.0 24.0 24.0 24.0 chain extender 13.5 13.5 13.5 13.5 13.5 13.5 13.5 calcium carbonate 100% by weight remaining balance

division Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 PPG 12.0
(Mw=4,500) 12.0
(Mw=2,000) 7.0 22.0 12.0 12.0 PEG 18.0
(Mw=1,000) 18.0
(Mw=3,500) 18.0 18.0 9.0 31.5 inorganic pigment 4.0 4.0 4.0 4.0 4.0 4.0 non-asbestos talc 24.0 24.0 24.0 24.0 24.0 24.0 chain extender 13.5 13.5 13.5 13.5 13.5 13.5 calcium carbonate 100% by weight remaining balance

Experimental Example: Measurement of Physical Properties of Adhesives

Ease of training termination, adhesive strength, heat resistance and slip resistance of the adhesives prepared by mixing and stirring the packaged adhesives prepared in the above Examples and Comparative Examples were measured, and the results are shown in Table 3 below.

Ease of training termination, adhesive strength, heat resistance and slip resistance were measured according to the KS L 1593:2000 method.

division end of training
check
ease Adhesive strength (N/mm ² ) heat resistance slip
resistance standard hot water heat aging low temperature hardening in alkaline water Example 1 clear 1.1 0.30 1.1 0.60 0.50 clear clear Example 2 clear 1.2 0.42 1.2 0.63 0.54 clear clear Example 3 clear 1.1 0.33 1.0 0.72 0.62 clear clear Example 4 clear 1.3 0.62 1.3 0.56 0.71 clear clear Example 5 clear 1.0 0.27 1.0 0.54 0.43 clear clear Example 6 clear 0.9 0.44 1.0 0.81 0.73 clear clear Example 7 clear 1.3 0.33 1.2 0.53 0.60 clear clear Comparative Example 1 clear 1.0 0.23 1.0 0.42 0.52 clear clear Comparative Example 2 clear 1.2 0.28 0.8 0.70 0.61 clear clear Comparative Example 3 clear 1.0 0.32 1.1 0.85 0.53 commonly commonly Comparative Example 4 commonly 1.2 0.51 1.2 0.36 0.37 clear clear Comparative Example 5 clear 0.8 0.45 0.7 0.80 0.72 commonly clear Comparative Example 6 clear 1.2 0.42 0.9 0.43 0.50 clear commonly

Looking at Table 3, in the case of Comparative Example 1 using polypropylene glycol (PPG) having a weight average molecular weight of more than 4,000 to 4,500 among the main components, Example 1 (Mw = 2,000) and Example 2 (Mw = 3000 ), there was a problem that the adhesive strength of hot water and low temperature curing was significantly lowered.

And, in the case of Comparative Example 1 using polyethylene glycol (PEG) having a weight average molecular weight of more than 3,000 and 3,500 among the main components, in comparison with Example 1 (Mw = 1,000) and Example 3 (Mw = 2,500), There was a problem that the adhesive strength of hot water and heat aging was relatively significantly lowered.

In addition, in the case of Comparative Example 3 using 7% by weight of PPG content of less than 8% by weight of the main component, compared to Example 1 (12% by weight) and Example 4 (9% by weight), low-temperature curability is excellent, There was a problem that the standard adhesive strength was relatively low, and the heat resistance and slip resistance were not good.

And, in the case of Comparative Example 4 using 22% by weight of PPG content exceeding 20% by weight in the main component, compared to Example 1 (12% by weight) and Example 5 (18% by weight), rather low-temperature curing adhesive strength And there was a problem that the adhesive strength in alkali water was greatly lowered, and there was a problem that the kneading result was not easy to confirm.

And, in the case of Comparative Example 5 using 9% by weight, which is less than 10% by weight of PEG in the main component, compared to Example 1 (18% by weight) and Example 6 (13% by weight), relatively heat aging adhesive strength was insufficient, and there was a problem of poor heat resistance.

In addition, in the case of Comparative Example 6, in which the PEG content of the main component was used at 31.5% by weight, which exceeded 30% by weight, compared to Example 7 (26% by weight), the overall adhesive strength properties were relatively reduced, and the slip resistance Had a falling problem.

Claims (9)

Including a subject and a curing agent,
The subject includes polypropylene glycol, polyethylene glycol, chain extenders, non-asbestos talc, inorganic pigments and calcium carbonate,
8 to 20% by weight of polypropylene glycol, 10 to 30% by weight of polyethylene glycol, 10 to 20% by weight of chain extender, 20 to 40% by weight of non-asbestos talc, 1 to 10% by weight of inorganic pigment, and the remainder of 100% by weight A two-component polyurethane-based adhesive for tiles, characterized in that it comprises calcium carbonate of.
The two-component polyurethane-based adhesive for tiles according to claim 1, wherein the adhesive further comprises a colorant.
delete Including a subject and a curing agent,
The subject includes polypropylene glycol, polyethylene glycol, chain extenders, non-asbestos talc, inorganic pigments and calcium carbonate,
The curing agent includes 50 to 60% by weight of polyalkylene glycol and 100% by weight of the remainder of the isocyanate-based compound,
The isocyanate-based compound is HDI (Hexamethylene diisocyante), HDI-trimer (HDI-trimer), MDI (Methylene diisocyante), TDI (Tolune diisocyante), H-MDI (hydrogenated MDI), IPDI (Isophrone diisocyante) and IPDI-trimer ( A two-component polyurethane-based adhesive for tiles comprising at least one selected from IPDI-trimer).
Including a subject and a curing agent,
The subject includes polypropylene glycol, polyethylene glycol, chain extenders, non-asbestos talc, inorganic pigments and calcium carbonate,
The polypropylene glycol has a weight average molecular weight of 400 to 4,000, and the polyethylene glycol has a weight average molecular weight of 500 to 3,000.
The two-component polyurethane-based adhesive for tiles according to claim 1, wherein the curing agent is included in an amount of 7.0 to 12.0 parts by weight based on 100 parts by weight of the main agent.
The two-component polyurethane-based adhesive for tiles according to claim 2, wherein the colorant is included in an amount of 0.10 to 1.00 parts by weight based on 100 parts by weight of the main agent.
The method of any one selected from claims 1, 2, 4 to 7, wherein the adhesive is a solvent-free adhesive,
Adhesives mixed with the main agent and hardener are measured in accordance with KS L 1593:2020
Standard adhesive strength 0.9 N/mm ² or more, hot water adhesive strength 0.25 N/mm ² or more, heat aging adhesive strength 1.0 N/mm ² or more, low-temperature cure adhesive strength 0.50 N/mm ² or more, and alkaline water adhesive strength 0.40 N/mm A two-component polyurethane-based adhesive for tiles, characterized in that it satisfies ² or more.
A tile construction method using the two-component polyurethane adhesive of claim 8,
The tile construction method characterized in that the tile construction is performed by tile attachment construction, tile compression construction, or tile attachment compression construction.

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