JPH083554A - Liquid-type soil moisture-treating agent - Google Patents

Abstract

PURPOSE:To provide a liquid type soil moisture-treating agent which comprises an alkylene oxide derivative, glycerol, fillers and a moisture-absorbing resin, thereby showing moisture-absorbing properties, uniform dispersion and enabling its viscosity and water absorption to be set to any desired level. CONSTITUTION:This treating agent comprises (A) a powdery or granular water- absorbing resin (for example, crosslinked acrylate salt polymer, crosslinked starch-acrylic acid graft copolymer, preferably having 20-1,000mum, particularly 50-500mum particle sizes), (B) at least one of liquid substance selected from alkylene oxide derivatives (for example, monoethylene glycol, diethylene glycol) and/or glycerol and (C) at least one selected from inorganic and/or organic fillers. In a preferred embodiment, ingredient A is used in an amount of 100 pts.wt.; ingredient B is in 30-10,000 pts.wt.; and ingredient C is in 0.1-10,000 pts.wt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents dripping or outflow of water when moving or storing high-moisture soil or sediment discharged from civil engineering construction sites, revetment construction sites, sewage treatment plants, etc. The present invention relates to a soil water treatment agent that is added or stirred and mixed for the purpose, and more particularly to a liquid-type soil water treatment agent that absorbs and fixes the water content of a corresponding substance by utilizing the water absorption characteristics of a water absorbent resin.

[0002]

2. Description of the Related Art Water absorbent resins have been widely used in civil engineering construction sites and sewage treatment plants, but if the water absorbent resin is a powder, it scatters when it is sprayed or mixed. However, there was a problem that the working environment was deteriorated. Further, when the water-absorbent resin comes into contact with water, there is a problem that "mamako" occurs due to rapid water absorption and the water-absorbing performance is deteriorated. Therefore, in order to improve these problems, a method of adding an alkylene oxide derivative or glycerin to the water absorbent resin has been proposed.

[0003]

However, in the method of adding the water absorbent resin to the alkylene oxide derivative or glycerin, the concentration stability, fluidization performance, and There has been a problem that the stirring performance is lowered and a non-uniform dispersion is likely to be formed. Further, in the soil water treatment agent obtained by this method, it was very inconvenient because it was not possible to adjust the viscosity most suitable for the work or set it to an arbitrary water absorption capacity. The present invention was made in view of these points, and an object thereof is to provide a liquid type soil moisture treatment agent which is a uniform dispersion liquid and in which the viscosity and the water absorption capacity can be arbitrarily set. To do.

[0004]

[Means and Effects for Solving the Problems]

[Claim 1] In order to achieve the above object, the liquid type soil moisture treatment agent according to claim 1 is a powder or granular water-absorbent resin A of a resin composition exhibiting water-absorbing properties, an alkylene oxide derivative, and At least one liquid B selected from glycerin and / or at least one filler C selected from an inorganic filler and / or an organic filler are mixed. The component A is 100 parts by weight and the component B is 3 parts.
It is preferable that 0 to 10000 parts by weight and C component be 0.1 to 10000 parts by weight.

[Water-absorbent resin] As the water-absorbent resin, for example, those listed in claim 3 are applicable, and one or more of them are used. These water-absorbent resins are powders or granules and have a particle size of about 20 to 1000 μm, preferably about 50 to 500 μm. [Alkylene oxide derivative] Examples of the alkylene oxide derivative include polyols such as glycerin monoethylene glycol, propylene glycol, diethylene glycol, polyethylene glycol, polyethylene glycol / polypropylene glycol copolymer, ethylene glycol monoethyl ether, and ethylene glycol monobutyl ether. Ethylene glycol monoalkyl ethers, polyoxyethylene lauryl ether and other polyoxyethylene monoalkyl ethers, poxyoxyethylene nonylphenyl ether and other polyoxyethylene alkylphenyl ethers,
Examples include polyoxyethylene monoalkylates such as polyoxyethylene monooleate. Considering the handling and workability of the dispersion liquid, among the polyols such as monoethylene glycol, diethylene glycol, polyethylene glycol or glycerin, those having a relatively high viscosity are preferable. By mixing and dipping the surface of the water-absorbent resin with a liquid agent such as an alkylene oxide derivative so as to cover the surface of the water-absorbent resin, it is possible to prevent sudden water absorption of the water-absorbent resin when this solution comes into contact with water. Can be prevented. That is, since the above liquid agent has an affinity for water before the water absorbent resin, water absorption of the water absorbent resin is performed in conjunction with the decrease in the concentration of the liquid agent, and by utilizing this characteristic, the water absorption of the water absorbent resin is performed. It is possible to variably adjust the ability.

[Filler] Examples of the filler include fine hollow spheres, porous fine spheres, carbon black, white carbon, calcium carbonate-based agents, clay-based agents, talc, barium sulfate, alumina, diatomaceous earth, and metal powders. , Graphite, titanium oxide, zinc oxide, fly ash,
Inorganic fillers such as asbestos, glass fiber, sludge,
Charcoal powder, ebonite powder, lignin phenol resin, high styrene resin, cellulose, synthetic resin, cotton linder, pulp, synthetic fiber, paper pieces, glucose, fructose, starch,
Organic fillers such as cornstarch and grain flour are applicable, and one or more of these are mixed and used. It is preferable to use an organic filler, particularly a plant product type one, since it naturally decomposes after use. In the liquid type soil moisture treatment agent according to the present invention, the effect of sedimentation is exerted by the filling effect of the filler to the water-absorbent resin, and it becomes possible to prepare a uniform dispersion liquid having good storage stability and stirring property. . Further, since the filler is mixed with the liquid agent, it is possible to arbitrarily adjust the viscosity (fluidity) with good workability by the sliding effect due to the filler entering between the water absorbent resins. Furthermore, when the liquid type soil moisture treating agent of the present invention comes into contact with moisture soil or high moisture deposits, a rapid water absorption is prevented by the filler effect, and therefore a decrease in water absorption rate due to the occurrence of "Mamako" is prevented. be able to. Further, by appropriately selecting the shape of the filler, the presence or absence of the porosity of the filler, the hydrophilic state of the filler, and the like, the sedimentation stability can be set to a desired level even for a water-absorbent resin of about 100 μm or more. . here,
The shape of the filler means the particle size in the case of the filler of the particle body and the length thereof in the case of the filler of the fibrous body, and is 0.05 μm to 1 m.
A filler having a particle diameter of about m or a filler having a length of about 0.05 mm to 10 mm may be appropriately selected. When the particle diameter of the water-absorbent resin is 20 μm or more, precipitation cannot be prevented by improving the liquid agent by using a highly viscous liquid agent or a surfactant, and therefore the above method is significant.

[Invention of Claim 4] A liquid type soil moisture treatment agent according to Claim 4 is a water-absorbent resin A selected from powder or granules of a resin composition exhibiting water-absorbing properties, an alkylene oxide derivative and / Or at least one liquid agent B selected from glycerin and at least one filler C selected from inorganic fillers and / or organic fillers
And an electrolyte additive D and water E. Note that A
Component 100 parts by weight, component B 30 to 10,000 parts by weight, component C 0.1 to 10000 parts by weight, component D 0.
0001 to 1000 parts by weight, and the E component is preferably 0.01 to 30 parts by weight with respect to the B component by weight.

[Electrolyte Additive and Water] Examples of the electrolyte additive include carbonate compounds, sodium salts, citrates, tartrates, succinates, acetates, butyrates, hydrochlorides, nitrates, nitrites, Sulfates, sulfites, hydrosulfides, oxalates, phosphates, carboxylic acids, boric acid, metaboric acid, benzoic acid, aqueous ammonia, urea, lead hydroxide, hydrazine, ethylamine, aniline, either one or Two or more kinds are mixed and used. In this invention, since the electrolyte additive is added, it is possible to prevent water absorption during storage of the water absorbent resin, and it is possible to produce a liquid type soil moisture treatment agent containing water. When a liquid-type soil moisture treatment agent is made by mixing water with an alkylene oxide derivative, etc., the water absorbing function of the water absorbent resin will be promoted during storage, but the addition of an electrolyte additive will suppress the water absorption of the electrolyte. Due to the effect, it becomes possible to secure a stable unabsorbed state of the water absorbent resin. Also,
When an alkylene oxide derivative or the like is arbitrarily selected,
Separation may occur due to incompatibility with each other, but by dissolving one liquid agent in water in advance and adding it to the other liquid agent, the above separation problem can be solved. . According to this method, it is possible to arbitrarily select even two types of liquid agents that are incompatible with each other, so that it is possible to set an arbitrary water absorption suppressing effect depending on the strength of hydrophilicity, and appropriately adjust the water absorption rate of the water absorbent resin. It is possible to prevent the occurrence of "mamako".

[Invention of Claim 6] In the liquid agent for treating soil water according to claim 6, a water-soluble thickener F is dissolved in water E in advance, and the solution B is added. The compounding part by weight of the F component is 0.1 to 100 relative to the E component by weight.
It is desirable that the amount is parts by weight, and that the viscosity after mixing and dissolving the water-soluble thickener in water is preferably 10,000 cp or less. [Water-soluble thickener] The water-soluble thickener, for example, sodium alginate, propylene glycol alginate, sodium caseinate, sodium carboxymethyl cellulose, sodium polyacrylate, sodium fibrin glycolate, sodium starch glycolate,
Examples include sodium starch phosphate, methyl cellulose, gum arabic, casein, sodium caseinate, alginic acid, guar gum, gelatin, agar, and locust bean gum. In order to improve the sedimentation stability in a liquid agent such as an alkylene oxide derivative, it is necessary to use a liquid agent having a high molecular weight, but when such a liquid agent is used, molecules are crystallized when the temperature of the solution is lowered to form a solid state. Will not function as a uniform dispersion. However, in the present invention, it is possible to increase the viscosity to an arbitrary viscosity by adding a water-soluble thickener dissolved in water to a liquid agent having a high molecular weight. Further, by mixing the water-soluble thickener with the alkylene oxide derivative or the like, it becomes possible to maintain stable sedimentation stability without freezing even below the freezing point.

[0010]

【Example】

[Test Example 1] Water absorption capacity of mixed solution with water With respect to the mixed solution of monoethylene glycol and water, the water absorption suppressing effect was examined by changing the monoethylene glycol concentration in the range of 60% to 100%. That is, a monoethylene glycol mixed solution was added to the water absorbent resin SA-60 (Sumitomo Seika Chemical Industries, Ltd.), and one hour later, it was evaluated how many times the weight of the water absorbent resin was increased. The evaluation categories were 50 times or less (evaluation 1), 50 times to 100 times (evaluation 2), and 100 times or more (evaluation 3). The results are shown in Table 1,
It was confirmed that when the concentration of the monoethylene glycol mixed solution was 90% or more, a sufficient water absorption suppressing effect was exhibited.

[0011]

[Table 1]

[Test Example 2] Sedimentation-Preventing Effect of Filler SA-60 (Sumitomo Seika) having a central particle size of 400 μm was used as a water absorbent resin, and a central particle size of 0.05 μm was used as a filler.
Precipitated calcium carbonate mixed with 0.1 μm, 2 μm and 20 μm was used. Further, the weight ratio is such that monoethylene glycol is used as the liquid agent, the resin amount is 45%, the monoethylene glycol is 55% to 35%, and the filler is 0% to.
It was set to 20%. The sedimentation stability was evaluated every day by dividing it into 5% or less (evaluation 1), 10% or less (evaluation 2), 30% or less (evaluation 3), and 30% or more (evaluation 4). As shown in Table 2, it was confirmed that good sedimentation stability was obtained when the amount of the filler was 20% or more.

[0013]

[Table 2]

Test Example 3 Difference in Sedimentation Due to Difference in Filler Type and Particle Size When the amount of the filler is 20%, what kind of influence the type and particle size of the filler have on the sedimentation preventing effect. I tested whether it came out. SA- with a central particle size of 400 μm as a water-absorbent resin
60 (Sumitomo Seika) was used, and monoethylene glycol was used as a liquid agent. The weight ratio was 50% resin, 30% monoethylene glycol, and 20% filler, and the following seven types of fillers were used. NO. 1 ... Precipitated calcium carbonate with a central particle size of 0.1 μm NO. 2 ... Sodium silicate-based inorganic fine hollow sphere silica balloon NO. 3 ... Spherical shirasu balloon with a central particle size of 0.15 mm NO. 4 ... Clay NO. 5 ... Diatomaceous earth with a central particle size of 0.05 mm NO. 6 ... Starch with central particle size of 0.05 mm For sedimentation stability, 5% or less (Evaluation 1), 10% or less (Evaluation 2), 30% or less (Evaluation 3) every day,
30% or more (evaluation 4) was evaluated. The results are shown in Table 3, and NO. It was confirmed that good sedimentation stability was exhibited except in the case of 7.

[0015]

[Table 3]

[Test Example 4] Change in fluidity due to composite blending of filler particle size When fillers having different particle sizes are used in combination, when the filler, the water absorbent resin and the liquid agent are mixed, the bearing The effect should be exerted and the stirring property and fluidity should be improved. Therefore, the same filler was compounded and compounded with different particle diameters, and the difference in viscosity was tested. Central particle size of 400 μm as water-absorbent resin
SA-60 (Sumitomo Seika Chemical Industries, Ltd.) was used, the weight ratio was 38% monoethylene glycol as a liquid agent, and the resin amount was 50%. The mixing ratios are as follows. NO. 1 ... Compounding with a central particle size of 0.1 μm and 2.0 μm in a ratio of 1:10 NO. 2 ... 8 with a central particle size of 0.1 μm and 50 μm:
Compounded in No. 2 3: 2 with a central particle size of 0.1 μm and 50 μm:
Compounded in No. 1 4 ... with a central particle size of 0.1 μm and 50 μm 2:
Compounded in No. 3 5: Central particle sizes of 0.1 μm and 30.0 μm are mixed at 5: 5 NO. 6 ... Compounds having central particle sizes of 0.1 .mu.m and 150.0 .mu.m in a ratio of 1:10. Viscosity measured with a B-type viscometer (NO 4, 4 rpm, 30 sec) is shown in Table 4. By mixing those having different particle sizes, a difference in viscosity from 4000 cp to 30,000 cp occurs, and it is confirmed that the viscosity can be set by appropriately compounding and mixing those having different particle sizes.

[0017]

[Table 4]

[Test Example 5] Difference in "Mamako" Occurrence Status with and without Filler A 3 g soil treatment agent (test sample) in which a water-absorbent resin, a liquid agent and a filler are mixed is put together in one place, and 500 g is added thereto. The water was gradually injected, and the state of occurrence of "Mamako" was examined 2 minutes after the injection. The water-absorbent resin is manufactured by Sanyo Chemical Industry Co., Ltd.
-580 was used (resin amount 50%), and monoethylene glycol was used as the liquid agent. The central particle size of the filler is 0.5 μm, and the addition amount of the filler is 0%, 1%, 5%, 10
%, 20% is the test sample NO. 1-NO. It was set to 5.
The results are shown in Table 5, with a central particle size of 0.5 μm.
It was confirmed that "mamako" did not occur when the addition amount of the filler of m was 5% or more.

[0019]

[Table 5]

Test Example 6 Water Absorption of Absorbent Resin in Electrolyte Solution A mixture of glycerin and water was used as a liquid agent, and the glycerin concentration was 100%, 90%, 80%,
70% liquid agent, water-absorbent resin SA with a central particle size of 400 μm
When 1 g of -60 (Sumitomo Seika) was added, it was examined what difference the volume increase rate after 1 hour was caused by the presence or absence of the electrolyte calcium chloride. The evaluation categories were 50% or less in volume increase (evaluation 1), 50 to 100 times (evaluation 2), and 100 times or more (evaluation 3). The results are shown in Table 6.
The glycerin concentration is 90% (water 10
%), No special difference occurs regardless of the presence or absence of electrolyte, but when the glycerin concentration is about 80%,
There is a clear difference due to the addition of electrolyte.

[0021]

[Table 6]

Test Example 7 Compatibility Test A liquid agent of monoethylene glycol and water was added with a molecular weight of 2000
The polyoxyethylene-polyoxypropylene copolymer of was added and tested for compatibility. (1) First, the following four types of test bodies were made. Specimen No. 1 ... 150 g of monoethylene glycol,
A mixture of 150 g of the polyoxyethylene-polyoxypropylene condensate described above. 2 ... Mixture of 240 g of water and 60 g of the above polyoxyethylene-polyoxypropylene copolymer Specimen No. 3 ... A mixture of 240 g of water, 30 g of the polyoxyethylene-polyoxypropylene copolymer, and 30 g of monoethylene glycol. 4. Mixture of 240 g of water and 60 g of monoethylene glycol (2) The liquid separation properties of these test pieces after standing for 24 hours were determined. The results are shown in Table 7, and monoethylene having poor compatibility is shown. Glycol and polyoxyethylene-
Even with the polyoxypropylene copolymer, the test sample NO. Two
NO. It was confirmed that 3 did not separate.

[0023]

[Table 7]

Test Example 8 Water Absorption Rate Test Using a solution of monoethylene glycol and water, a molecular weight of 2000
The water absorption rate of the water-absorbent resin was tested for the following test bodies to which the polyoxyethylene-polyoxypropylene copolymer of 1. was added. Specimen No. 1 ... 240 g of water and polyoxyethylene-
Mixture of 60 g of polyoxypropylene copolymer Specimen No. 2 ... 240 g of water and polyoxyethylene-
Mixture of 30 g of polyoxypropylene copolymer and 30 g of monoethylene glycol Specimen No. 3 ... Mixture of 240 g of water and 60 g of monoethylene glycol SA-60N (Sumitomo Seika) having a central particle size of 400 μm
Then, the volume increase rate of the water absorbent resin was examined 2 minutes and 30 seconds after the above test body was added. The results are shown in Table 8.

[0025]

[Table 8]

[Test Example 9] A water-soluble thickener was added to a solution of monoethylene glycol and water, and the viscosity and the low temperature stability were investigated. Specifically, a thickener, sodium alginate, was added to the following test bodies, and the fluidity at 20 ° C and -10 ° C was confirmed by the viscosity. Specimen No. 1 ... Monoethylene glycol test sample NO. 2 ... Polyethylene glycol # 400 (#
Is a hydroxyl value) Specimen No. 3 ... Liquid in which sodium alginate was dissolved in water to increase the viscosity of monoethylene glycol up to 1000 cp was evaluated as fluidity (evaluation 1), viscosity increased but fluidity (evaluation 2), and solidified. (Evaluation 3) and the results are shown in Table 9.

[0027]

[Table 9]

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location C09K 17/48 P 17/50 P // C09K 103: 00

Claims (7)

[Claims] 1. A water-absorbent resin A which is a powder or granules of a resin composition exhibiting water-absorbing properties, a liquid agent B which is at least one selected from alkylene oxide derivatives and / or glycerin, an inorganic filler and / or Alternatively, a liquid-type soil moisture treatment agent obtained by mixing with at least one filler C selected from organic fillers. 2. The component A is 100 parts by weight and the component B is 30 to 30 parts by weight.
The liquid type soil moisture treatment agent according to claim 1, wherein the amount of the component C is 0.1 to 10,000 parts by weight and the component C is 0.1 to 10,000 parts by weight. 3. The water-absorbent resin is a cross-linked acrylate polymer, a cross-linked starch-acrylic acid graft copolymer,
Starch-acrylonitrile graft polymer, isobutylene-maleic anhydride copolymer cross-linked product, ethylene oxide-based polymer, vinyl acetate-saponified acrylate-based copolymer,
Carboxymethyl cellulose-based polymer, carboxymethyl cellulose-based polymer cross-linked product, acrylate-acrylamide copolymer, saponified vinyl acetate-maleic anhydride copolymer, ethylene oxide-based polymer, polysaccharide-acrylic acid graft polymer The liquid type soil moisture treatment agent according to claim 1 or 2, which is a mixture of one or more selected from the following. 4. A water absorbent resin A selected from powders or granules of a resin composition exhibiting water absorbing properties, a liquid agent B which is at least one selected from an alkylene oxide derivative and / or glycerin, and an inorganic filler. A liquid type soil moisture treatment agent comprising a filler C, which is at least one selected from an agent and / or an organic filler, an electrolyte additive D, and water E. 5. The component A is 100 parts by weight and the component B is 30 to 30 parts by weight.
The composition according to claim 4, wherein the C component is 0.1 to 10000 parts by weight, the D component is 0.0001 to 1000 parts by weight, and the E component is 0.01 to 30 parts by weight with respect to the B component by weight. Liquid type soil moisture treatment agent. 6. The liquid-type soil water treatment agent according to claim 4, wherein the water-soluble thickener F dissolved in water E in advance is added to the liquid agent B. 7. The F component is 0.1 to 0.1 part by weight of the E component.
The liquid type soil moisture treatment agent according to claim 6, which is 100 parts by weight.