KR102050226B1 - Composition for reducing scattered dust - Google Patents

Abstract

The present invention relates to a polymer-based scattering dust reducing agent, which is composed of a polymer synthesized by polycondensation reaction of an amine compound having a polyhydric alcohol group with dihydric or higher alcohol. Due to the long chain-like molecular structure of a polymer structure, the length of the polymer is longer than that of a conventional polymer, the scattering of the particles is effectively suppressed by binding the particles in three directions, and the polymer-based scattering dust reducing agent can be useful for building materials for improving construction environment at construction sites.

Description

Composition for reducing scattering dust {Composition for reducing scattered dust}

The present invention relates to a polymer-based dust reduction agent, and more particularly, it is composed of a polymer synthesized by a polycondensation reaction of an amine compound having a polyhydric alcohol group with a dihydric alcohol or more, and has an elongated chain shape in the structure of the polymer. Due to the molecular structure of the polymer, the length of the polymer is longer than that of the conventional polymer and binds the particles in three directions, thereby effectively suppressing the scattering of the particles. The present invention relates to a polymer-based dust reducing agent, which has realized a significant dust reduction effect while satisfying fluidity and compressive strength in comparison with the physical performance of cement and mortar.

According to the Ministry of Environment's Air Pollution Conservation Act, dust is defined as particulate matter floating or scattering in the atmosphere. These dusts are further divided into particles having a particle size of 50 μm or less into total suspended particles (TSP) and particulate matter (PM) having very small particle sizes.

Comparing the total dust (TSP) and fine dust (PM10) emissions by region in Korea, the largest sources of emissions are in the order of road pavement and construction activities.

Fine dust may be generated from combustion of fuel, automobile exhaust gas, various construction sites, and civil engineering works. Such fine dust is also called dust. In particular, it is frequently generated in cement plants, briquette plants, milling plants, and aggregate plants, and environmental standards for such fine dust are set at a daily average concentration of 50 µg / m3 and an annual average concentration of 25 µg / m3. The daily average concentration of 35 µg / m 3 and the annual average concentration of 15 µg / m 3 were strengthened.

Such fugitive dust exists in the air while in a suspended state, and blocks sunlight, thereby adversely affecting plant growth by inhibiting assimilation, respiration, and transpiration.

Specifically, it may invade the human body through breathing and attach to respiratory organs such as bronchus and lungs, and some of these particles may be removed by coughing, sneezing, ciliary movement, etc. May indicate an impact. In particular, it is known that particulate matters are more likely to cause adverse effects on human health than other air pollutants because particulate matters are easier to deposit in the human lungs than gaseous substances as effects on the human body.

Therefore, in recent years, as well as the health and safety of workers in the construction site, concerns about the scattering dust of the residents near the site leads to a deterioration of the image of the construction and manufacturers, the need for improving the construction environment is increasing day by day.

In order to reduce scattering dust generated in various construction and civil engineering sites, a device for sucking and purifying dust, such as a dust collector, may be used. However, the use of such a device is expensive and has a limited space. Forced ventilation should be used using a fan, and in this case, dust that is to be discharged to the outside must be treated separately, resulting in inconvenience and secondary pollution.

In general, sprinkling method is used as a countermeasure for scattering dust on unpaved roads, bare lands and yards, but it is effective in suppressing dust generation, but it has a disadvantage of short suppression time, it does not completely prevent scattering dust, and furthermore, cut powder of concrete In this case, secondary pollution may occur because it hardens with water over time.

As an example of a scattering dust suppressor, Patent Document 1 discloses a method of spraying a mixture of magnesium chloride or calcium chloride and water as a suppressor for suppressing scattering dust on an unpaved ground several times. However, magnesium chloride or calcium chloride, which is used as representative salts, has various hydrate structures, ionized when mixed with aqueous solutions, and used in large amounts to increase soil salinity, resulting in salt accumulation. This can interfere with plant growth and cause soil acidification and equipment corrosion.

As another example, Patent Literature 2 discloses an emulsion in which 2-20% by weight of dispersoid and remaining water and other unavoidable impurities are uniformly mixed, wherein the dispersoid is 30-45% by weight of an acrylic polymer compound and 40-60 of oil. It consists of up to 8% by weight of water, 5% by weight of water and less than 5% of the surfactant, and proposes a coating agent excellent in shatterproof and waterproof.

In addition, Patent Document 3 reports that by using vegetable oils or animal fats and oils as a natural coating agent for preventing scattering, even if they are mixed with minerals such as coal, they do not generate harmful gases or cause calorific changes in the combustion process. However, the use of vegetable oil and animal oil alone may cause soil contamination due to the encapsulation of the soil, and animal stearic acid obtained from tallow, pork, fish oil, butter, etc. may cause odors around the coating as the temperature increases. There is a problem that can be caused.

Patent Document 4 discloses a dispersion scattering prevention composition prepared using vinyl acetate monomer and polyvinyl alcohol, acrylic acid, surfactant, and water as main components, but this resin type is insoluble and spreads on soil particles to bind particles, It has a hard solid form to reduce dust.

In addition, known scattering dust inhibitors use a surfactant to weaken the surface tension to allow the surface dust particles to contain water molecules, or asphalts are suggested, but they contain polyaromatic hydrocarbons. There is concern.

Further, Patent Document 5 includes a core particle; And a dust inhibitor disposed around the core particles to suppress dust formation of the core particles and comprising a polyurethane, having a dust reduction gradient of more than 20% and a dissolution rate of 30 or less after 1 day aging in 38 ° C. water. Dust suppressed aggregates with gradients are shown.

Accordingly, the present inventors have tried to solve the conventional problem of the inhibitor that can reduce the scattering dust on the road pavement and construction site, the water absorption or hydration action to suppress the scattering dust of hydraulic material such as cement in the construction site The present invention was completed by selecting a polymer material so as not to affect the polymer material, and preparing a polymer by a polycondensation reaction of triethanolamine and a dihydric alcohol, thereby confirming excellent physical properties for reducing dust scattering.

Republic of Korea Patent No. 10-0494538 (June 10, 2005) Republic of Korea Patent Publication No. 10-2006-0085864 (Published July 28, 2006) Republic of Korea Patent No. 10-0748156 (August 10, 2007) Republic of Korea Patent 10-1595654 (2016.02.18. Notification) Republic of Korea Patent Publication No. 10-2015-133004 (2015.02.04. Publication)

An object of the present invention is to provide a polymer-based dust reduction agent.

In order to achieve the above object, the present invention provides a polymer dust scattering agent composed of a polymer synthesized by a polycondensation reaction of an amine compound having a polyhydric alcohol group and a dihydric or higher alcohol.

Specifically, the polymer is synthesized from a polycondensation reaction in a 1: 1 to 1: 3 molar ratio between the amine compound having a polyhydric alcohol group and the dihydric alcohol or more, and is preferably triethanolamine as the amine compound having the polyhydric alcohol group. (triethanolamine), trimethanolamine (trimethanolamine) and triisopropanolamine (triisopropanolamine) is any one selected from the group, more preferably using a triethanolamine, as the dihydric or more alcohol, a preferred example Diethylene glycol, 1,3-butylene glycol, ethylene glycol, trimethylene glycol, 1,2-butylene glycol, 2,3-butylene glycol, hexylene glycol, octylene glycol and glycerin selected from the group It is either one, More preferably, diethylene glycol is used.

The polymer dust scattering agent of the present invention is provided in the liquid form of the polymer alone.

The present invention provides a dust reduction agent composed of a polymer synthesized by a polycondensation reaction between an amine compound having a polyhydric alcohol group and a dihydric alcohol or more, wherein the polymer-based dust reduction agent absorbs water or affects hydration. It is useful for suppressing scattering dust of hydraulic materials such as cement and mortar at the construction site.

In addition, since the polymer-based dust reducing agent is provided in a high-speed mixing and spraying in the liquid form of the polymer alone, it is easy to handle and apply.

The present invention is applied to the surface of the cement and mortar by spraying polymer-based dust reducing agent, thereby achieving a significant dust reduction effect while meeting the fluidity and compressive strength of the cement and mortar physical properties more than or equal to that. .

1 is a fluidity test result of mortar according to the amount of scattering dust reducing agent added of the present invention,
2 is a compressive strength test results of the mortar according to the amount of scattering dust reducing agent added of the present invention,
3 is a comparative photograph for the visual evaluation of dust generation according to the inclusion of scattering dust reducing agent of the present invention,
4 is a device manufactured for quantitative evaluation measurement for dust reduction of the scattering dust reducing agent of the present invention,
5 is a quantitative evaluation result of the dust reduction effect when the scattering dust reducing agent of the present invention is applied to cement and mortar.

Hereinafter, the present invention will be described in detail.

The present invention provides a scattering dust reducing agent composed of a polymer synthesized by a polycondensation reaction of an amine compound having a polyhydric alcohol group and a dihydric or higher alcohol.

Specifically, the polymer is synthesized from the polycondensation reaction in a 1: 1 to 1: 3 molar ratio between the amine compound having a polyhydric alcohol group and the dihydric alcohol or more, and the synthesis of the polymer is confirmed using Gas Chromatography (GC). By confirming the increase in molecular weight, it is possible to confirm the presence or absence of synthesis.

The amine compound having a polyhydric alcohol group is any one selected from the group consisting of triethanolamine, trimethanolamine, and triisopropanolamine, and more preferably triethanolamine is used.

Moreover, as said bivalent or more alcohol, Preferably, diethylene glycol, 1, 3- butylene glycol, ethylene glycol, trimethylene glycol, 1,2- butylene glycol, 2, 3- butylene glycol, hexylene glycol , Octylene glycol and glycerin can be used any one selected from the group consisting of.

In the embodiment of the present invention, as a more preferred embodiment, it is described in detail using triethanolamine and diethylene glycol, but if the dihydric alcohol or more of the requirement that polycondensation reaction of the -OH functional group of triethanolamine can be used without particular limitation Could be.

In addition, in the examples of the present invention, based on the molecular weight 149 of the starting material triethanolamine and the molecular weight 92 of ethylene glycol, the synthesis results in a molar ratio of 1: 1 to 1: 3 can be confirmed by GC, and the reaction scheme is as follows. Same as

Although all of the polymers synthesized in the molar ratio showed a dust reduction effect, the embodiment of the present invention is most preferably carried out using a polymer synthesized in a 1: 3 molar ratio of triethanolamine and ethylene glycol.

As can be seen from the above scheme, in the polycondensation reaction, the polymer-based dust reducing agent synthesized by a reaction in which a monomer having two different functional groups form a chain and a condensate is formed, has an elongated chain-like molecular structure. As a composite, the particles are longer than the molecules of the conventional polymer and bind the particles in three directions, thereby effectively preventing scattering of the particles.

The scattering dust reducing agent of the present invention is a liquid type of the polymer alone, and is applicable to high-speed mixing and spraying on the surface of cement and mortar, thereby achieving a significant dust reduction effect while meeting the fluidity and compressive strength of the cement and mortar physically. You can check.

FIG. 1 is a flow test result of mortar according to the amount of dust reducing agent added of the present invention. As the amount of dust reducing agent added increases, the blow flow is improved, that is, the flowability of mortar is increased compared to the test group without the scattering dust reducing agent added. By showing a tendency to reduce the amount of the mixture during the production of mortar, it is possible to increase the functional additive content of the scattering dust reducing agent by that much, it is possible to improve the physical properties. In particular, the dust reduction effect can be maximized.

2 is a compressive strength test result of mortar according to the addition amount of dust reduction agent of the present invention, compression by age as the addition amount of the scattering dust reduction agent made of a polymer synthesized from the reaction of triethanolamine and diethylene glycol Intensity shows increased results.

In addition, as shown in Figure 3 , as a comparative photograph for the visual evaluation of the dust generation according to the inclusion of the scattering dust reducing agent, when the addition of 2.5 parts by weight of the scattering dust reducing agent, it is possible to visually confirm the degree of significant scattering dust reduction. .

4 and 5 is a device manufactured for the quantitative evaluation of the dust reduction effect when the dust reduction agent of the present invention is applied to cement and mortar, showing the results, the addition amount of the dust reduction agent of the present invention The increase of cement and mortar scattering dust can be quantitatively reduced.In particular, the amount of scattering dust reducing agent is reduced. You can check the result.

Hereinafter, the present invention will be described in more detail with reference to Examples.

This embodiment is intended to illustrate the present invention in more detail, and the scope of the present invention is not limited to these examples.

Example 1 Polymer-based Dust Reducing Agent

The polymer was synthesized by polycondensation reaction with triethanolamine in a 1: 3 molar ratio of diethylene glycol. At this time, the presence or absence of synthesis was confirmed by increasing the molecular weight using GC (Gas Chromatography).

Comparative Example 1

Instead of the polymer of Example 1, it was carried out in the same manner as in Example 1, except that triethanolamine was injected.

Comparative Example 2

Instead of the polymer of Example 1, except that the injection of diethylene glycol, it was carried out in the same manner as in Example 1.

Experimental Example 1 Physical Performance Evaluation of Mortar by Addition of Shatter Dust Reducing Agent

In Example 1, the dust reduction agent composed of a polymer synthesized from the reaction of triethanolamine and diethylene glycol was used as cement mortar (cement and ISO standard sand ratio of 1: 3, and the amount of mixed water was W / C = 0.5). With respect to parts by weight, 0 parts by weight, 2.5 parts by weight, 5 parts by weight, 7.5 parts by weight, and 10 parts by weight of the combined samples were mechanically mixed, and then the physical performance was evaluated.

1) Blow Flow Experiment Evaluation

Cement mortar containing the fly dust reducing agent made of a polymer synthesized in the triethanolamine and diethylene glycol prepared in Example 1 was put into a flow mold 2.5cm thick and chopped 20 times with a compaction rod and ground 1.25cm high In, the flow was measured by dropping 25 times for 15 seconds, the flow can be confirmed through the flow of cement mortar.

FIG. 1 is a flow test result of mortar according to the amount of dust reducing agent added, and from the result of FIG. 1, as the amount of scattering dust reducing agent made of a polymer synthesized with triethanolamine and diethylene glycol increases, It was confirmed that the blow flow improved results than the test group without addition.

The result of the improvement of the blow flow means that the flowability of the mortar is improved, so that the amount of the mixture can be reduced during the production of the mortar, and the functional additive content of the scattering dust reducer can be increased, thereby maximizing the dust reduction effect. have.

2) compressive strength test evaluation

The sample prepared by mixing the scattering dust reduction agent made of a polymer synthesized by the reaction of repeating the condensation reaction of triethanolamine with diethylene glycol in Example 1 by the reaction of producing a high molecular compound for each added amount is 1, 3, 7 After 28 days, the compressive strength was measured.

Figure 2 shows the results of the compressive strength of the mortar for each addition amount of dust reduction agent of the present invention, from the result of Figure 2, the amount of added dust reduction agent made of a polymer synthesized from the reaction of triethanolamine and diethylene glycol As this increased, the compressive strength by age increased. Specifically, when the addition amount is 2 to 7 parts by weight condition, the compressive strength of each age tends to increase as the amount of addition is increased, and when 10 parts by weight is added, the compressive strength improvement by age is maintained similarly to the addition amount, but the fluidity is increased. Considering the reduction of mixing volume, the compressive strength is expected to be comparable with that of general cement without scattering dust reduction agent.

Experimental Example 2 Evaluation of Dust Reduction Effect

1) Visual evaluation

FIG. 3 is a comparative photograph result of the visual evaluation of dust generation according to the containing of the dust reducing agent of the present invention, by varying the addition amount of the dust reducing agent made of the polymer synthesized in Example 1 to 0 parts by weight and 2.5 parts by weight. After mechanically mixing the combined samples, 100 g of the sample was temporarily dropped at a height of 59 cm, and the occurrence of dust was visually observed.

Thus, as a result of comparing the dust generation results of the test group added with 0 parts by weight of the scattering dust reducing agent (general cement without the scattering dust reducing agent treatment), the test group having 2.5 parts by weight of the scattering dust reducing agent showed a significant reduction in the amount of scattering dust. It could be confirmed with the naked eye.

2) Quantitative Evaluation

For the polymer synthesized in Example 1, in order to quantitatively evaluate the dust reduction, the cement and the mortar are combined in different amounts by 0 parts, 2.5 parts, 5 parts, 7.5 parts, and 10 parts Samples were mechanically mixed.

Figure 4 is a device manufactured to measure the quantitative evaluation of dust reduction of the scattering dust reducing agent of the present invention, after the mixing, 200g of the sample is temporarily dropped from the height of 59cm to the sample inlet of the acrylic cylinder tube, 45cm The generation of dust was quantitatively assessed using a digital dust meter (KANOMAX, MODEL 3443) installed at the height.

FIG. 5 is a quantitative evaluation result of the dust reduction effect when the scattering dust reducing agent of the present invention is applied to cement and mortar, and it is confirmed that the scattering dust of cement and mortar is significantly reduced as the amount of the scattering dust reducing agent is increased. .

Particularly, in the case of 2.5 parts by weight of dust reducing agent, the levels were 6.7% and 4.8%, respectively. The air level was 40-50 CPM.

While the invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the scope of the invention, and such modifications and variations belong to the appended claims.

Claims (5)

Per 100 parts by weight of cement or mortar,
For the reduction of scattering dust formed by mixing 2 to 7 parts by weight of a polymer scattering dust reducing agent composed of a polymer synthesized with -OH functional groups in three directions of terminal groups by polycondensation reaction of an amine compound having a polyhydric alcohol group with a divalent or higher alcohol. Composition. The composition for reducing scattering dust according to claim 1, wherein the polymer is synthesized from a polycondensation reaction in a 1: 1 to 1: 3 molar ratio between an amine compound having a polyhydric alcohol group and a dihydric or higher alcohol. The composition for reducing scattering dust according to claim 1, wherein the amine compound having a polyhydric alcohol group is triethanolamine. The method of claim 1, wherein the dihydric or higher alcohol is diethylene glycol, 1,3-butylene glycol, ethylene glycol, trimethylene glycol, 1,2-butylene glycol, 2,3-butylene glycol, hexylene glycol , Octylene glycol and glycerin is any one selected from the group consisting of scattering dust reduction composition. The composition of claim 1, wherein the polymer-based dust reducing agent is applied to cement or mortar in a liquid form of the polymer alone.

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