JP2021127380A - Composition for preparation of dust scattering prevention material, dust scattering prevention material, and method for preparation of dust scattering prevention material - Google Patents

Abstract

To provide a composition for preparation of a dust scattering prevention material whereby it is possible to prevent formation of undissolved lumps when preparing a dust scattering prevention material containing a thickener.SOLUTION: A composition for preparation of a dust scattering prevention material has a thickener, a dispersant that is liquid at room temperature (excluding surfactants), and water. The ratio of the volume of the dispersant (unit: mL) to the weight of the thickener (unit: g) is 1.0-4.0. The dispersant and water are contained in such amounts that the concentration of the dispersant becomes 31 vol.% or more if the dispersant is dissolved in water to prepare an aqueous solution.SELECTED DRAWING: None

Description

The present invention relates to a composition for preparing a dust scattering prevention material, a dust scattering prevention material, and a method for preparing a dust scattering prevention material.

At civil engineering sites and soil storage facilities, in order to prevent the surface layer of soil from being scattered by the wind or flowing out by the rain, the soil is covered on the same day or covered with a sheet at the end of daily work. As a method for preventing the soil from scattering as dust, for example, as disclosed in Patent Document 1, a method of spraying a dust scattering preventing material containing polyvinyl alcohol on the surface layer of the soil is known. This dust scattering prevention material has an appropriate viscosity and is easy to spray.

JP-A-2019-1953

In the dust scattering prevention material, a thickener may be added to adjust the viscosity in consideration of ease of spraying and the water content ratio of the target soil. However, thickeners are prone to lumps (lamping) when in contact with water. If lumps occur, the hose nozzle and pump may be clogged during spraying, which may cause spraying failure, machine trouble, etc., and hinder the scattering prevention ability. In order to prepare the dust scattering preventive material so as not to cause lumps, it is necessary to add a thickener little by little, and the preparation takes a long time.

Therefore, an object of the present invention is to provide a composition for preparing a dust scattering preventive material, which is less likely to cause lumps when preparing a dust scattering prevention material containing a thickener. Another object of the present invention is to provide a dust scattering prevention material prepared by using the dust scattering prevention material preparation composition, and a method for preparing the dust scattering prevention material.

The present invention contains a thickener, a dispersant that is liquid at room temperature (excluding surfactants), and water, and the volume (unit: g) of the dispersant relative to the weight (unit: g) of the thickener. The ratio of mL) is 1.0 to 4.0, and the dispersant and water have a concentration of 31% by volume or more of the dispersant, assuming that the dispersant is dissolved in water to prepare an aqueous solution. Provided is a composition for preparing a dust scattering preventive material, which is contained in such an amount.

In this composition for preparing a dust scattering preventive material, the thickener is protected by a dispersant. When a dust scattering prevention material is prepared using this dust scattering prevention material preparation composition, the dispersant acts to appropriately disperse the thickener in water, so that the thickener is less likely to become lumpy.

Ethanol or polyethylene glycol is preferable as the dispersant that is liquid at room temperature.

The composition for preparing the dust scattering preventive material is preferably in the form of a paste. When it is in the form of a paste, it is easy to handle thereafter.

Further, the present invention contains a thickener and a dispersant solid at room temperature (excluding surfactants and polyethylene glycol granules), and the ratio of the weight of the dispersant to the weight of the thickener is 0. A composition for preparing a dust scattering preventive material, which is .6 to 1.5, is provided. Further, the present invention contains a thickener and polyethylene glycol granules, and the ratio of the weight of the polyethylene glycol granules to the weight of the thickener is 0.4 to 1.5. Provide things.

In this composition for preparing a dust scattering preventive material, the thickener is protected by a dispersant. When a dust scattering prevention material is prepared using this dust scattering prevention material preparation composition, the dispersant acts to appropriately disperse the thickener in water, so that the thickener is less likely to become lumpy.

In any of the above compositions for preparing a dust scattering preventive material, the thickener is preferably a polysaccharide.

Further, the present invention is a dust scattering preventing material containing water, polyvinyl acetate, polyvinyl alcohol, a thickener, and a dispersant, and the volume ratio of water to polyvinyl acetate is 90:10. ~ 99.2: 0.8, and the volume of polyvinyl alcohol when the total volume of water and polyvinyl acetate is 100% is 0.005% to 0.5%, and the thickener and dispersant. Is contained using any of the above compositions for preparing a dust scattering preventive material, and the content of the thickener is 2.0 when the total weight of the dust scattering preventive material is 100%. Provided is a dust scattering prevention material having a weight of% or less.

Since this dust scattering prevention material is prepared by using the above-mentioned dust scattering prevention material preparation composition, the generation of lumps is suppressed, the risk of nozzle clogging is small, and the viscosity is appropriate. Easy to spray.

Further, in the present invention, polyvinyl acetate, polyvinyl alcohol, the composition for preparing a dust scattering prevention material according to any one of the above, and water are mixed, and the volume ratio of water to polyvinyl acetate is obtained. Is 90:10 to 99.2: 0.8, and the volume of polyvinyl alcohol is 0.005% to 0.5% when the total volume of water and polyvinyl acetate is 100%, and the viscosity is increased. Provided is a method for preparing a dust scattering preventive material, wherein the content of the agent is 2.0% by weight or less when the total weight of the dust scattering prevention material is 100%.

In this preparation method, since the dust scattering prevention material is prepared using the above-mentioned dust scattering prevention material preparation composition, the generation of lumps is suppressed. The prepared dust scattering prevention material is less likely to be clogged in the nozzle, and has an appropriate viscosity and is easy to spray.

According to the present invention, it is possible to provide a composition for preparing a dust scattering preventive material, which is less likely to cause lumps when preparing a dust scattering prevention material containing a thickener. Further, it is possible to provide a dust scattering prevention material prepared by using the dust scattering prevention material preparation composition, and a method for preparing the dust scattering prevention material.

It is a graph which shows the time-dependent change of the viscosity of the solution prepared in Test Examples 1-7. It is a graph which shows the time-dependent change of the viscosity of the solution prepared in Test Examples 8-14.

Hereinafter, preferred embodiments of the present invention will be described in detail.

<Dust scattering prevention material>
The dust scattering prevention material of the present embodiment is a liquid mixture to be sprayed on the surface layer of soil, and contains water, polyvinyl acetate, polyvinyl alcohol, a thickener, and a dispersant.

The volume ratio of water to polyvinyl acetate is 90: 10-99.2: 0.8, and this volume ratio is preferably 98: 2-99.2: 0.8. When the volume ratio is within these ranges, the viscosity of the dust scattering prevention material is maintained in a state suitable for spraying, and when sprayed on the soil, a film made of a polymer can be formed on the surface of the soil.

The content of polyvinyl alcohol is 0.005% by volume to 0.5% by volume when the total volume of water and polyvinyl acetate is 100%. The lower limit may be 0.01% by volume or 0.05% by volume, and the upper limit may be 0.3% by volume or 0.1% by volume. The content of polyvinyl alcohol is too high. The viscosity of the dust scattering prevention material tends to increase, making it difficult to spray. Further, if the content of polyvinyl alcohol is too low, polyvinyl acetate tends to be difficult to dissolve in water. From these circumstances, the content of polyvinyl alcohol is preferably within the above range.

The polyvinyl alcohol may be present in the dust scattering preventive material in the form of polyvinyl alcohol molecules, or may be present in the form of a residue of emulsion polymerization of vinyl acetate. In addition, it may exist in the form of a molecular structure derived from a polyvinyl alcohol molecule.

The composition ratios of water, polyvinyl acetate and polyvinyl alcohol in the dust scattering inhibitor are, for example, nuclear magnetic resonance spectroscopy (NBR), infrared absorption spectroscopy (IR), size exclusion chromatography (SEC), and liquid chromatography. (LC), can be measured by thermal resolution-mass spectrometry (Pyrrolisis-MS).

The thickener increases the viscosity of the dust shatterproof material, and is particularly useful for applying the dust shatterproof material when the water content of the target soil is high. The content of the thickener is 2.0% by weight or less, preferably 1.5% by weight or less, and 1.0% by weight or less, assuming that the total weight of the dust scattering prevention material is 100%. Is more preferable, and 0.6% by weight or less is further preferable. The lower limit values are preferably 0.1% by weight, 0.2% by weight, and 0.4% by weight. When the content of the thickener exceeds 2.0% by weight, the viscosity of the dust scattering prevention material becomes high, and it tends to be difficult to spray.

The thickener is preferably water-soluble, with polysaccharides being preferred. Polysaccharides include guagam, arabic gum, xanthan gum, carboxymethyl cellulose, tamarind seed gum, carrageenan, carrageenan, succinoglycan, locust bean gum, soybean polysaccharide, pullulan, psyllium seed gum, curdlan, alginate / PGA, gellan gum, Examples include glucomannan, agar, pectin and the like. Among these, guar gum containing galactomannan as a main component is preferable.

As the dispersant (excluding the surfactant), a liquid or solid at room temperature is used. Here, the normal temperature means 15 ° C to 25 ° C. Examples of the dispersant liquid at room temperature include ethanol, polyethylene glycol, ethylene glycol, 1-propanol, 2-ppanol, 2-butanol and the like. Examples of the dispersant solid at room temperature include sucrose, capsaicin, dextrin, glucose, fructose, lactose, panothinose, maltooligosaccharide, frucoligosaccharide, polyethylene glycol powder, polyethylene glycol granules and the like. Among them, capsaicin has good visibility after spraying due to its unique color, and has a repellent effect that keeps animals away from the sprayed soil due to its irritation.

The composition ratio of the thickener and the dispersant in the dust scattering prevention material can be measured by, for example, a gas chromatography method or a liquid chromatography method.

<Preparation method of dust scattering prevention material>
When preparing the dust scattering prevention material, the thickener and the dispersant are mixed in advance to prepare a composition for preparing the dust scattering prevention material.

(Composition for preparing dust scattering prevention material)
When the dispersant is a liquid at room temperature, the dispersant is made into an aqueous solution prior to mixing with the thickener. The concentration of the dispersant aqueous solution at this time is 31% by volume or more. This concentration may be 35% by volume or more, or 40% by volume or more. Further, examples of the upper limit of this concentration include 80% by volume, 70% by volume, 60% by volume, and 50% by volume. As the mixing ratio of the thickener and the dispersant, the ratio of the volume of the dispersant (unit: mL) to the weight of the thickener (unit: g) is 1.0 to 4.0. This ratio may be 1.5 to 3.5, 2.0 to 3.0, 2.2 to 2.8, or 2.4 to 2.6. There may be. From the viewpoint of facilitating subsequent handling and storage, the composition for preparing a dust scattering preventive material prepared by mixing a thickener and an aqueous solution of a dispersant is preferably a paste.

When the dispersant is solid at room temperature, the thickener and the dispersant are mixed to prepare a composition for preparing a dust scattering preventive material. The mixing ratio of the thickener and the dispersant is 0.6 to 1.5 by weight. This ratio may be 0.7 to 1.3, 0.8 to 1.1, or 0.9 to 1.0. When the dispersant is in the form of granules (for example, polyethylene glycol granules), the weight ratio is 0.4 to 1.5. This ratio may be 0.6 to 1.3, 0.8 to 1.1, or 0.9 to 1.0.

(Preparation method of dust scattering prevention material)
As a method for preparing the dust scattering prevention material, water is put into a large container such as a die light tank, and the composition for preparing the dust scattering prevention material, polyvinyl acetate, and polyvinyl alcohol are added to the water, and a hand mixer is used. It is preferable to stir with or the like. Further, a method is preferable in which polyvinyl acetate and polyvinyl alcohol are mixed and dissolved in an appropriate amount of water, and then water is added to obtain the above composition ratio. For example, polyvinyl acetate and polyvinyl alcohol are mixed with 1 to 3 times the volume of water as polyvinyl acetate (that is, 25% to 50% by volume as polyvinyl acetate), and this is heated at room temperature or by heating. While stirring, adjust the dissolved product.

Further, when polyvinyl acetate and polyvinyl alcohol are added to water, the water becomes cloudy and opaque. Therefore, from the viewpoint of visibility, the composition for preparing a dust scattering preventive material is first added and stirred to prevent dust scattering. It is preferable to add polyvinyl acetate and polyvinyl alcohol after the composition for preparation is sufficiently diffused. Finally, water is added so that the overall composition ratio and concentration are within the above composition ratio and concentration range. In this way, the dust scattering prevention material can be prepared.

In the dust scattering prevention material prepared as described above, the dispersant acts to appropriately disperse the thickener in water, so that the thickener is less likely to become lumpy. And since it has the above composition ratio, it has an appropriate viscosity and is easy to spray. Then, since the sprayed dust scattering prevention material forms a film on the surface of the soil, dust is prevented from scattering from the surface layer of the soil.

As a method of spraying dust scattering prevention material, engine pump and fire hose, sprinkler (machine), hydroceeder (car), distributor, water jet, dust sprinkler at demolition site, wireless sprinkler (heavy machine), sprinkler Etc. can be mentioned.

Further, since the dust scattering prevention material contains a thickener, a sufficient film can be formed even if the dust scattering prevention material is diluted with water contained in the soil. For example, when the water content of the soil is high, such as immediately after rainfall, it is possible that the sprayed dust scattering prevention material will be diluted by the water in the soil, or that the material components will flow out rather than staying on the soil surface. When the viscosity is increased by adding a thickener, it is difficult for the soil to penetrate into the soil, and a film is formed on the surface of the soil to prevent scattering.

Further, when the composition for preparing a dust scattering preventive material in the preparation process is in the form of a paste, it is easy to store it for a certain period of time, and it is easy to carry it in a bag.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

Hereinafter, the content of the present invention will be described in more detail with reference to test examples. The present invention is not limited to the following test examples. First, the degree of lumps generated in the thickener and the viscosity of the solution when a dispersant was used were investigated.

(Test Example 1)
About 500 mL of water was put into a 1 L high-tail bottle (square bottle). Guar gum as a thickening polysaccharide and sucrose as a dispersant (specific gravity 0.68) were weighed and mixed so as to have a weight ratio of 1: 1. This powder mixture is put into the above high-tail bottle in an amount such that the concentration of guar gum is 0.5% (guar gum weight / total volume), and then stirred at 200 (± 20) rpm for 1.5 minutes for 0.5 minutes. It was observed whether or not lumps were generated at each time point of 1 minute and 1.5 minutes. After that, it was allowed to stand for 24 hours. In the process, the viscosity was measured at each time point of 0.5 minutes, 1 minute, 1.5 minutes, 2 hours, 5 hours and 24 hours. The viscosity was measured with a viscometer (SV type viscometer (SV-10) manufactured by A & D Co., Ltd.). The results are shown in Table 1. The evaluation criteria for "damage judgment" are as follows.
◎… It melted without becoming lumpy at all.
○… Slightly lumpy, but generally well dissolved.
Δ: Multiple small lumps were scattered on the surface.
× ... It became a lump and did not melt completely.

(Test Example 2)
The test was carried out in the same manner as in Test Example 1 except that the sucrose was changed to capsaicin (bulk specific density 0.44) in the procedure of Test Example 1. The results are shown in Table 1.

(Test Example 3)
In the procedure of Test Example 1, sucrose was changed to ethanol, and the mixing ratio with guar gum was changed so that the ratio of the weight of guar gum (g) to the volume of ethanol (mL) was 1: 2. Was tested in the same manner as in Test Example 1. The mixture of guar gum and ethanol was in the form of a paste. The results are shown in Table 1.

(Test Example 4)
The test was carried out in the same manner as in Test Example 3 except that ethanol was changed to liquid polyethylene glycol (PEG) (molecular weight: 200, freezing point: −45 ° C.) in the procedure of Test Example 3. The mixture of guar gum and polyethylene glycol was in the form of a paste. The results are shown in Table 1.

(Test Example 5)
In the procedure of Test Example 1, the test was carried out in the same manner as in Test Example 1 except that only guar gum was put into a high-tail bottle without using a dispersant. The results are shown in Table 1.

(Test Example 6)
In the procedure of Test Example 1, the test was carried out in the same manner as in Test Example 1 except that the sucrose was changed to polyethylene glycol (PEG) powder (bulk specific density 0.52, molecular weight: 3100, freezing point: 55 ° C.). rice field. The results are shown in Table 1.

(Test Example 7)
In the procedure of Test Example 1, the test was carried out in the same manner as in Test Example 1 except that the sucrose was changed to polyethylene glycol (PEG) granules (bulk specific gravity 0.64, molecular weight: 3100, freezing point: 55 ° C.). rice field. The results are shown in Table 1.

(Test Example 8)
1000 mL of water was placed in a 2 L beaker (cylindrical bottle). Guar gum as a thickening polysaccharide and sucrose as a dispersant were weighed and mixed so as to have a weight ratio of 1: 1. This mixture is placed in the beaker bottle in an amount such that the concentration of guar gum is 0.5% (guar gum weight / total volume), and then stirred at 200 (± 20) rpm for 1.5 minutes for 0.5 minutes, 1 It was observed whether or not lumps were generated at each time point of 1 minute and 1.5 minutes. After that, it was allowed to stand for 24 hours. In the process, the viscosity was measured at each time point of 0.5 minutes, 1 minute, 1.5 minutes, 2 hours, 5 hours and 24 hours. The viscosity was measured with a viscometer (SV type viscometer (SV-10) manufactured by A & D Co., Ltd.). The results are shown in Table 2. The evaluation criteria for "damage judgment" are as follows.
◎… It melted without becoming lumpy at all.
○… Slightly lumpy, but generally well dissolved.
Δ: Multiple small lumps were scattered on the surface.
× ... It became a lump and did not melt completely.

(Test Example 9)
The test was carried out in the same manner as in Test Example 8 except that sucrose was changed to capsaicin in the procedure of Test Example 8. The results are shown in Table 2.

(Test Example 10)
In the procedure of Test Example 8, sucrose was changed to ethanol, and the mixing ratio with guar gum was changed so that the ratio of the weight of guar gum (g) to the volume of ethanol (mL) was 1: 2. Was tested in the same manner as in Test Example 8. The results are shown in Table 2.

(Test Example 11)
The test was carried out in the same manner as in Test Example 10 except that ethanol was changed to polyethylene glycol in the procedure of Test Example 10. The results are shown in Table 2.

(Test Example 12)
In the procedure of Test Example 8, the test was carried out in the same manner as in Test Example 8 except that only guar gum was put into a high-tail bottle without using a dispersant. The results are shown in Table 2.

(Test Example 13)
The test was carried out in the same manner as in Test Example 8 except that the sucrose was changed to polyethylene glycol powder (bulk specific density 0.52) in the procedure of Test Example 8. The results are shown in Table 1.

(Test Example 14)
The test was carried out in the same manner as in Test Example 8 except that the sucrose was changed to polyethylene glycol granules (bulk specific density 0.64) in the procedure of Test Example 8. The results are shown in Table 1.

From the results shown in Tables 1 and 2, where lumps occurred when only guar gum was added to water (Test Example 5 and Test Example 12), when guar gum was mixed with a dispersant and then added to water, it was determined. It was confirmed that lumps are less likely to occur. In particular, it was found that the effect was high when ethanol or polyethylene glycol was used as the dispersant. In addition, from the viscosity measurement results, it was confirmed that the viscosity of the solution did not increase extremely even when the dispersant was added. Therefore, it is considered that the addition of the dispersant does not make it difficult to disperse as a dust scattering prevention material. The results of the lump judgment in Test Example 1 and Test Example 2 are slightly worse than the results of the lump judgment in Test Example 8 and Test Example 9 in the high tail bottle (square bottle) and the beaker (cylindrical bottle). It is considered that this is due to the difference in stirring efficiency.

Graphs of the viscosity data of Tables 1 and 2 are shown in FIGS. 1 and 2, respectively.

Next, the mixing ratio of guar gum and various dispersants was examined. In particular, for ethanol and polyethylene glycol, the degree of dilution when mixed with guar gum was also examined.

(Test Examples 15 to 19)
A predetermined amount of water was placed in a 2 L beaker (cylindrical bottle) and stirred at about 200 rpm. The amount of this water was set so that the concentration of guar gum was 0.5% in consideration of the volume of guar gum and the dispersant to be added later. Guar gum as a thickening polysaccharide and sucrose as a dispersant were mixed in an amount shown in Table 3 by weight. The properties of the mixture at this time are shown in the item of "Mixing condition of guar gum and dispersant" in Table 3.

This mixture was put into the beaker bottle, and after 1.5 minutes, it was observed whether or not lumps had occurred. The observation results are shown in Table 3. The evaluation criteria for "damage judgment" are as follows.
◎… It melted without becoming lumpy at all.
○… Slightly lumpy, but generally well dissolved.
Δ: Multiple small lumps were scattered on the surface.
× ... It became a lump and did not melt completely.

(Test Examples 20 to 24)
The test was carried out in the same manner as in Test Examples 15 to 19 except that sucrose was changed to capsaicin in the procedures of Test Examples 15 to 19. The results of Test Examples 20 to 24 are shown in Table 3.

(Test Examples 25-29)
The test was carried out in the same manner as in Test Examples 15 to 19 except that the sucrose was changed to polyethylene glycol powder in the procedures of Test Examples 15 to 19. The results of Test Examples 25 to 29 are shown in Table 3.

(Test Examples 30 to 34)
The test was carried out in the same manner as in Test Examples 15 to 19 except that sucrose was changed to polyethylene glycol granules in the procedures of Test Examples 15 to 19. The results of Test Examples 30 to 34 are shown in Table 3.

(Test Example 35)
In the procedure of Test Example 15, sucrose was changed to ethanol, and the mixing ratio with guar gum was the ratio shown in Table 3 as the ratio of the weight of guar gum (g) to the volume of ethanol (mL) (guar gum 5 g, ethanol). The test was carried out in the same manner as in Test Example 15 except that it was changed to 32 mL). Here, ethanol was made into a 5% aqueous solution and then mixed with guar gum. That is, 640 mL of an aqueous ethanol solution prepared with 32 mL of ethanol was mixed with guar gum, and the mixture was put into a beaker containing water. The results are shown in Table 3.

(Test Examples 36 to 41)
The test was carried out in the same manner as in Test Example 35 except that the amount of ethanol used and the concentration of the aqueous ethanol solution were changed to those shown in Table 3 in the procedure of Test Example 21. The results are shown in Table 3.

(Test Example 42)
In the procedure of Test Example 15, the sucrose was changed to liquid polyethylene glycol, and the mixing ratio with guagam was the amount shown in Table 3 as the ratio of the weight of guagam (g) to the volume of polyethylene glycol (mL). The test was carried out in the same manner as in Test Example 15 except that the content was changed to 5 g of guagam and 26 mL of polyethylene glycol). Here, polyethylene glycol was made into a 10% aqueous solution and then mixed with guar gum. That is, 260 mL of a polyethylene glycol aqueous solution prepared using 26 mL of polyethylene glycol was mixed with guar gum, and the mixture was put into a beaker containing water. The results are shown in Table 3.

(Test Examples 43 to 48)
The test was carried out in the same manner as in Test Example 42 except that the amount of polyethylene glycol used and the concentration of the polyethylene glycol aqueous solution were changed to those shown in Table 3 in the procedure of Test Example 42. The results are shown in Table 3.

(Test Example 49)
In the procedure of Test Example 15, sucrose was changed to an oil dispersion detergent which is a nonionic surfactant, and the mixing ratio with guagam was the weight (g) of guagam and the volume (mL) of the oil dispersion detergent. The test was carried out in the same manner as in Test Example 15 except that the ratio was changed to the amount shown in Table 3 (5 g of guagam, 22 mL of oil dispersion detergent). Here, the oil dispersion detergent was made into a 60% aqueous solution and then mixed with guar gum. That is, 37 mL of an aqueous oil dispersion detergent solution prepared using 22 mL of an oil dispersion detergent was mixed with guagam, and the mixture was put into a beaker containing water. The results are shown in Table 3.

(Test Examples 50 to 52)
The test was carried out in the same manner as in Test Example 49 except that the amount of the oil dispersion detergent used and the concentration of the oil dispersion detergent aqueous solution were changed to those shown in Table 3 in the procedure of Test Example 49. The results are shown in Table 3.

From the results shown in Table 3, it was found that there is an appropriate range in the amount ratio of guar gum and the dispersant from the viewpoint of suppressing guar gum from becoming lumpy. It was also found that when the dispersant is a liquid, the concentration of the aqueous solution of the dispersant when mixed with guar gum has an appropriate range.

The present invention can be used for preparing a dust scattering prevention material.

Claims (8)

Contains a thickener, a dispersant that is liquid at room temperature (excluding surfactants), and water.
The ratio of the volume (unit: mL) of the dispersant to the weight (unit: g) of the thickener is 1.0 to 4.0.
The dispersant and the water are contained in an amount such that the concentration of the dispersant is 31% by volume or more when it is assumed that the dispersant is dissolved in the water to prepare an aqueous solution. Composition for preparing shatterproof material. The composition for preparing a dust scattering preventive material according to claim 1, wherein the dispersant is ethanol or polyethylene glycol. The composition for preparing a dust scattering preventive material according to claim 1 or 2, which is in the form of a paste. Contains a thickener and a dispersant that is solid at room temperature (excluding surfactants and polyethylene glycol granules).
A composition for preparing a dust scattering preventive material, wherein the ratio of the weight of the dispersant to the weight of the thickener is 0.6 to 1.5. Contains thickener and polyethylene glycol granules,
A composition for preparing a dust scattering preventive material, wherein the ratio of the weight of the polyethylene glycol granules to the weight of the thickener is 0.4 to 1.5. The composition for preparing a dust scattering preventive material according to any one of claims 1 to 5, wherein the thickener is a polysaccharide. A dust scattering preventive material containing water, polyvinyl acetate, polyvinyl alcohol, a thickener, and a dispersant.
The volume ratio of the water to the polyvinyl acetate is 90: 10-99.2: 0.8.
The volume of the polyvinyl alcohol is 0.005% to 0.5% when the total volume of the water and the polyvinyl acetate is 100%.
The thickener and the dispersant are contained by using the composition for preparing a dust scattering preventive material according to any one of claims 1 to 6.
The content of the thickener is 2.0% by weight or less when the total weight of the dust scattering prevention material is 100%. Polyvinyl acetate, polyvinyl alcohol, the composition for preparing a dust scattering preventive material according to any one of claims 1 to 6, and water are mixed.
The volume ratio of the water to the polyvinyl acetate is 90: 10-99.2: 0.8.
The volume of the polyvinyl alcohol is 0.005% to 0.5% when the total volume of the water and the polyvinyl acetate is 100%.
A method for preparing a dust scattering preventive material, wherein the content of the thickener is 2.0% by weight or less when the total weight of the dust scattering prevention material is 100%.

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