KR20130069083A - Light tile adhesive composition based on plaster with improved waterproof - Google Patents

Abstract

The present invention relates to a gypsum-based lightweight tile adhesive composition improved water resistance, gypsum-based lightweight tile adhesive composition according to the present invention; Mineral admixtures including silica fume, blast furnace slag and slaked lime; Terpolymer reemulsifying powder resin; Filler; Cellulose ethers; And it includes a retardant, by using the environmentally friendly gypsum as a binder can meet the trend of eco-friendly, and also provides a high initial adhesive strength and water resistance to achieve excellent water-resistant adhesive strength.

Description

Gypsum-based lightweight tile adhesive composition with improved water resistance {LIGHT TILE ADHESIVE COMPOSITION BASED ON PLASTER WITH IMPROVED WATERPROOF}

The present invention relates to a gypsum-based lightweight tile adhesive composition having improved water resistance. More specifically, the present invention provides an eco-friendly gypsum-based lightweight tile adhesive composition that can protect the environment by using gypsum as a binder and environmental protection through the use of waste materials, giving high initial adhesive strength and water resistance to provide excellent water resistance. Implement strength.

Tile is a building material that has been widely used for a long time because of its beautiful appearance, convenience of construction, hygiene, and ease of maintenance. And emulsion-based adhesives, which have been increasingly used because of their economic efficiency and ease of construction.

Korean Patent No. 10-0937635 discloses a cement-based adhesive that can be attached to a low absorption rate of a polishing tile by using MEHEC and slaked lime as a thickener together with an acrylic redispersible powder resin having excellent water resistance and adhesive strength.

Korean Laid-Open Patent Publication No. 10-2009-0092377 discloses a tile cement adhesive that is lightened by mixing 3 to 8% by weight of light aggregate of 35 to 45% by weight of white Falkland cement as a binder.

In the previous art, the patent disclosure mainly focused on improving the performance of tile cement adhesives using cement as the main binder, silica sand, and the like, and cellulose ether as the admixture. For example, the present invention discloses a tile cement composition which can be attached to a low absorption rate of a polishing tile, and a tile cement composition which minimizes the lifting and dropping of the tiles due to the increase of the attachable time and the improvement of workability or the decrease of the tile adhesion by applying the lightweight aggregate.

However, it is widely known that tile cement has a long curing time until construction is possible after construction, has low weight, no humidity control function, and has a great harmful effect on the human body.

In particular, cement, which is used as a main binder, generates a large amount of CO ₂ gas in the production process and is considered as the main culprit of global warming, and it is a strong alkaline inorganic material and provides a cause of water pollution such as rivers. In addition, cement contains hexavalent chromium, a harmful substance that causes gastric cancer and skin diseases, and causes a problem of generating radon gas during cement curing process, which can cause lung cancer and is considered as one of the causes of sick house syndrome.

As a solution to this, gypsum is partially used as a substitute for cement binders, but the use of gypsum as a binder has limited its use due to its poor water resistance.

Therefore, the present inventors exclude strong alkaline cement from the main binder and use gypsum, which is an eco-friendly inorganic material, as the main binder, and unlike the existing tile cement adhesive, there is no generation of radon gas, does not contain hexavalent chromium, and the like. It can provide an environment-friendly living environment, and by using silica fume, slag, slaked lime and terpolymer reemulsified powder resin to compensate for the weak water resistance of gypsum, tile adhesive with improved water resistance can be obtained. The present invention has been completed.

Accordingly, the problem to be solved by the present invention is to provide a gypsum-based lightweight tile adhesive composition using a gypsum as the main binder that can provide excellent initial adhesive strength and water resistance to achieve excellent water resistance.

In order to solve the above problems, the present invention is a lightweight tile adhesive composition, gypsum binder; Mineral admixtures including silica fume, blast furnace slag and slaked lime; And it provides a gypsum-based lightweight tile adhesive composition, characterized in that it comprises a terpolymer re-emulsified powder resin.

In the gypsum-based lightweight tile adhesive composition according to the present invention, 40 to 60% by weight of gypsum binder, 3 to 20% by weight of silica fume, 3 to 20% by weight of blast furnace slag, 0.1 to 10% by weight of slaked lime, terpolymer Re-emulsifying powder resin is included in the amount of 2 to 10% by weight.

Gypsum-based lightweight tile adhesive composition according to the present invention is a filler, cellulose ether; And it is preferable to further include an additive selected from the group consisting of a retarder.

In the gypsum-based lightweight tile adhesive composition according to the present invention, when the filler, cellulose ether and retardant are further included, 20 to 60 wt% of gypsum binder, 3 to 20 wt% of silica fume, blast furnace slag 3 based on the total weight of the composition To 20% by weight, calcined lime 0.1 to 10% by weight, terpolymer polymerized 2 to 10% by weight of the re-emulsifying powder resin, 20 to 70% by weight filler, 0.1 to 1.0% by weight cellulose and 0.1 to 1.0% by weight retardant.

In addition, the gypsum is preferably selected from the group consisting of natural gypsum, desulfurized gypsum and phosphate gypsum.

When using the gypsum-based lightweight tile adhesive composition improved water resistance disclosed in the present invention can obtain the following effects.

First, it improves the workability of the worker through light weight.

Second, it is possible to shorten the construction air by enabling fast pedestrian opening after construction due to quick initial strength by fastness.

Third, it is possible to prevent the dropping of the tiles due to water by supplementing the water resistance.

Fourth, by adopting the eco-friendly gypsum material, harmful components of the human body are reduced, and the environment can be protected by recycling resources through the use of industrial by-products.

Hereinafter, the present invention will be described in more detail.

According to one embodiment of the present invention, the present invention provides a lightweight tile adhesive composition,

Gypsum binders;

Mineral admixtures including silica fume, blast furnace slag and slaked lime; And

It is a gypsum-based lightweight tile adhesive composition comprising a terpolymer polymer emulsifying powder resin.

In this embodiment, the gypsum binder is 40 to 60% by weight, silica fume 3 to 20% by weight, blast furnace slag 3 to 20% by weight, calcined lime is 0.1 to 10% by weight, terpolymer reemulsifying powder Resin is included in the range of 2 to 10% by weight.

It is a binder that replaces the highly alkaline cement that contains hexavalent chromium, generates radon gas during curing, and is known to be harmful to the human body. It coagulates and hardens through a chemical reaction to exert its bonding force.

The gypsum that can be used is preferably selected from the group consisting of natural gypsum, desulfurized gypsum and phosphate gypsum.

 The gypsum binder can be used in the range of 40 to 60% by weight based on the total weight of the composition, where the gypsum binder can be used up to 20% by weight with additional fillers, but less than 20% by weight. When used, the improvement in workability due to the reduction in strength and light weight is insignificant, and when used in excess of 60% by weight, water resistance and strength may occur and may be undesirable.

As a mineral admixture, silica fume and blast furnace slag are latent hydraulic materials, and they improve strength and water resistance by forming a tight structure through pozzolanic reaction with slaked lime and gypsum.

The silica fume may be used in the range of 3 to 20% by weight based on the total weight of the composition, where silica fume has a negative effect on water resistance when used in less than 3% by weight, or is used in excess of 20% by weight In this case, the amount of air entraining agent is increased to obtain an appropriate amount of air, a decrease in slump may cause poor workability, and it may be undesirable in terms of economy due to a problem of using a water reducing agent or a high performance water reducing agent to prevent slump reduction.

In addition, the blast furnace slag can be used in the range of 3 to 20% by weight based on the total weight of the composition, where the blast furnace slag is vulnerable to strength degradation and water resistance when used in less than 3% by weight or more than 20% by weight It may not be desirable.

In addition, slaked lime plays a role in adjusting pH and improving workability, which can be used in the range of 0.1 to 10% by weight based on the total weight of the composition, where slaked lime is used in less than 0.1% by weight. The improvement of workability is insufficient, does not function as a pH adjuster, or when used in excess of 10% by weight is exposed to a strong alkali environment, it may be undesirable due to the problem of inferior workability.

In addition, terpolymer reemulsifying powder resins include VAc / E (vinyl acetate / ethylene), VAc / VeoVa / E (vinyl acetate / vinyl versatate / ethylene), VAc / E / MMA ( vinyl acetate / ethylene / methyl methacrylate), VC / E / VL (vinyl chloride / ethylene / vinyl laurate), etc., and is kkoehage additional water resistance improved by forming a polymer film having a three-dimensional network structure within the adhesive, which It can be used in the range of 2 to 10% by weight based on the total weight of the composition, where the water resistance is less effective when the powdered resin is used less than 2% by weight, or economic problems when used in excess of 10% by weight May be undesirable.

According to another embodiment of the present invention, the present invention provides a lightweight tile adhesive composition,

Gypsum binders;

Mineral admixtures including silica fume, blast furnace slag and slaked lime;

Terpolymer reemulsifying powder resin; And

It is a gypsum-based lightweight tile adhesive composition with improved water resistance, characterized in that it comprises an additive selected from the group consisting of a filler, a cellulose ether and a retarder.

In this embodiment, that is, in the gypsum-based lightweight tile adhesive composition further comprising at least one additive selected from the group consisting of fillers, cellulose ethers and retarders, the gypsum binder is 20 to 60% by weight based on the total weight of the composition, silica fume is 3 to 20% by weight, blast furnace slag 3 to 20% by weight, calcined lime is 0.1 to 10% by weight, terpolymer re-emulsified powder resin is included in the range of 2 to 10% by weight, filler is 20 to 70% by weight, The cellulose ether is included in an amount of 0.1 to 1.0% by weight and the retardant in an amount of 0.1 to 1.0% by weight.

In addition, the filler is used to maintain a suitable particle diameter in the product to shorten the drying time, to maintain the workability, the filler may be silica sand or calcium carbonate (CaCO ₃ ), preferably silica sand . The filler is preferably used in the range of 20 to 70% by weight based on the total weight of the composition.

In addition, cellulose ether includes methyl cellulose (MC), ethyl cellulose (EC), hydroxyethyl cellulose (HEC), hydroxypropylmethyl cellulose (HPMC), hydroxypropylethyl cellulose (HPEC), and hydroxyethylmethyl cellulose (HEMC). ) And methyl ethyl hydroxyethyl cellulose (MEHEC) and the like, which are used to impart tackiness and water retention properties, are preferably used in the range of 0.1 to 1% by weight based on the total weight of the composition.

In addition, the retardant plays a role of securing working time by delaying the hydration reaction of the gypsum, mainly organic acids or salts of citric acid or tartaric acid may be used, and they may reduce the total weight of the composition. It is preferable to use in the range of 0.1 to 1 weight% based on a basis.

On the other hand, other additives and the like used in this field may be used to impart specific functions. For example, dispersants, antifoams, preservatives and the like can be used.

The present invention provides a lightweight tile adhesive composition using gypsum as the main binder to provide high initial adhesive strength and water resistance, thereby realizing excellent water resistance adhesive strength.

The present invention excludes strong alkaline cements that have harmful effects on the human body from the main binders and uses gypsum, which is an environmentally friendly inorganic material, as the main binder, and thus does not generate radon gas and does not contain hexavalent chromium, unlike conventional cement cement adhesives. And, it can provide a gypsum tile adhesive that provides an environment-friendly living environment having a humidity control function.

In addition, the gypsum-based tile adhesive according to the present invention has a weight ratio of 2/3 of cement, which makes it possible to lighten the weight of the worker and improves the work ability of workers. There is an advantage to shorten the air.

In the present invention, in the case of the building material using gypsum as a binder, the gypsum-based gypsum has improved water resistance by using silica fume, blast furnace slag and slaked lime as mineral admixtures and using terpolymer reemulsification powder resin. A tile adhesive can be obtained.

Hereinafter, the present invention will be described in more detail with reference to Examples, but is not limited by the following Examples of the present invention.

Example  1 to 4

Gypsum was used as a binder, and silica fume, slag, slaked lime, silica sand, redispersible powdered resin, cellulose ether and a retardant were mixed for 1 hour using a V-type mixer (JISICO) at a composition ratio as shown in Table 1 below. A gypsum-based lightweight tile adhesive composition was prepared.

Comparative example  One

Cement-based adhesive composition was prepared by using cement as a binder, and mixing slaked lime, silica sand, redispersible powdered resin, and cellulose ether for 1 hour using a V-type mixer (JISICO) at a composition ratio as shown in Table 1 below. It was.

Comparative example  2

A gypsum-based tile adhesive composition was prepared in the same manner as in Example, except that gypsum was used as a binder and silica sand, redispersible powdered resin, cellulose ether, and a retardant were mixed at a composition ratio as shown in Table 1 below.

cement natural
gypsum Desulfurized Gypsum Phosphate Gypsum Silica fume Slag Lime lime Silica sand RDP CE Retardant Example 1 0 35 0 0 5 5 2 46.4 6 0.3 0.3 Example 2 0 0 35 0 5 5 2 42.4 10 0.3 0.3 Example 3 0 0 0 35 5 5 2 42.5 10 0.3 0.2 Example 4 0 30 0 0 5 5 2 42.4 15 0.3 0.3 Comparative Example 1 40 0 0 0 0 0 2 55.7 2 0.3 0 Comparative Example 2 0 40 0 0 0 0 2 55.3 2 0.3 0.4

* RDP: terpolymer reemulsifying powder resin, Wacker, RE5012T (VAc / E terpolymer)

* CE: Cellulose Ether, Samsung Fine Chemicals, FMC-24006

(Viscosity 34,000-44,000 cps measured at 2% wet with Brookfield viscometer)

* Delay Retardant: Samjeon Pure Chemical Co., Ltd., Tartaric Acid

* Natural Gypsum: Literature Industry, Mono Deco

* Desulfurization gypsum: Lianyungang Zhongfu Lianzhong Composites Group, FDG

* Phosphate Gypsum: Taewon C & T

* Silica Fume: Nicacon, Silica Fume

* Slag: East-West Development, Blast Furnace Slag

* Slaked lime: Chungmu Chemical, (Ca (OH) 2)

* Gyu-sa: Kyungin Material, No. 7

Evaluation example

The physical properties of the tile adhesive compositions prepared in Examples 1 to 4 and Comparative Examples 1 and 2 were evaluated by the following method, and the results are shown in Table 2 below.

Test environment

-In a constant temperature and humidity room with 23 ± 3 ℃ and 50 ± 5% humidity

Test Methods

-pH measurement: According to Samsung Fine Chemicals standard method, the tile adhesive mortar is kneaded with water and measured with Metrohm pH Meter.

-Adhesive strength: measured after the specimen was prepared in accordance with EN 1348.

① Initial strength: After the specimen is prepared (23 ± 3 ℃, humidity 50 ± 5%), measure the post-cure strength after curing for 2 days.

② 27-day strength: after the specimen is prepared (23 ± 3 ℃, humidity 50 ± 5%) in the environment after curing 27 days curing strength.

③ Water-resistant strength: After 7 days curing in the environment (23 ± 3 ℃, humidity 50 ± 5%) after the specimen is manufactured, the adhesive strength is measured after 21 days additional curing in the standard temperature (23 ± 3 ℃) water.

-Specific gravity measurement: Conducted in accordance with Samsung Fine Chemicals standard method, the specimens were prepared using a 50 * 50 * 50mm cubic mold and measured by weight measurement.

Adhesive strength (MPa) pH importance
(g / cm3) Initial strength 27 days robbery Water resistance Example 1 0.86 1.52 0.47 7.2 1.32 Example 2 0.84 1.45 0.42 6.3 1.33 Example 3 0.82 1.43 0.45 6.8 1.37 Example 4 0.76 1.58 0.53 7.5 1.29 Comparative Example 1 0.62 1.33 0.41 > 13 1.75 Comparative Example 2 0.71 1.42 0.21 7.1 1.38

The following facts can be confirmed through Table 2 above.

First, when comparing Examples 1 to 4 and Comparative Example 1, Comparative Example 1, which is a cement adhesive is a tile adhesive used as a binder has a high alkaline environment with a pH of 13 or more, but a tile adhesive using gypsum as a binder is weakly acidic or neutral. It is close to the environment, making it an environmentally friendly material.

Second, Comparative Example 1, a tile adhesive composition using cement as a main binder, was found to be lower than the initial adhesive strength measured after two days of curing after preparation of the specimen, and Examples 1 to 4, which are tile adhesive compositions using gypsum as the main binder. Can be.

Third, Examples 1 to 4 using gypsum as the main binder have a lower density than Comparative Example 1 using cement as the main binder.

Fourth, when comparing Examples 1 to 4 and Comparative Example 2, gypsum was used as the main binder, but Comparative Example 2, which contains less RDP content and does not contain silica fume or slag, has significantly higher water resistance than Examples 1 to 2. You can see that it is low.

Through the above facts, the tile adhesive composition using the gypsum according to the present invention as the main binder can shorten the air of the construction work by enabling a very fast walk opening through the implementation of excellent initial strength and 27 days strength.

In addition, by compensating for the weak water resistance of the gypsum to realize the same level of strength as the cement-based tile cement, while at the same time light weight due to the low density (density) can increase the working efficiency of the workers.

In addition, it is possible to provide eco-friendly gypsum-based tile adhesive composition by adopting gypsum as the main binder, excluding hexavalent chromium, which generates radon gas during curing, and which has high alkalinity, which is known to be harmful to human body. In addition, by-products generated during thermal power generation and phosphate fertilizer production can be utilized to protect the environment through resource recycling.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims (5)

Lightweight tile adhesive composition,
Gypsum binders;
Mineral admixtures including silica fume, blast furnace slag and slaked lime; And
Gypsum-based lightweight tile adhesive composition comprising a terpolymer polymer emulsifying powder resin.
The method of claim 1,
40 to 60% by weight of gypsum binder, 3 to 20% by weight of silica fume, 3 to 20% by weight of blast furnace slag, 0.1 to 10% by weight of slaked lime and 2 to 10% by weight of terpolymer reemulsified powder resin A gypsum-based lightweight tile adhesive composition having improved water resistance.
The method of claim 1,
The lightweight tile adhesive composition comprises a filler, cellulose ether; And a gypsum-based lightweight tile adhesive composition with improved water resistance, characterized in that it further comprises an additive selected from the group consisting of a retarder.
The method of claim 3,
20 to 60% by weight of gypsum binder, 3 to 20% by weight of silica fume, 3 to 20% by weight of blast furnace slag, 0.1 to 10% by weight of slaked lime, 2 to 10% by weight of terpolymer reemulsified powder resin, filler 20 To 70% by weight, cellulose ether 0.1 to 1.0% by weight and retardant 0.1 to 1.0% by weight gypsum-based lightweight tile adhesive composition comprising a water resistance.
The method of claim 1,
The gypsum-based lightweight tile adhesive composition is selected from the group consisting of natural gypsum, desulfurized gypsum and phosphate gypsum.