JP3491176B2 - Composition for soil stabilization - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composition for stabilizing soil.
Related. 2. Description of the Related Art Conventionally, slopes and non-vegetable fabrics that have been created are subjected to wind and rain.
Use soil stabilizing agents to protect against erosion
Treatment to stabilize the soil surface,
Initially, such treatment agents have good water resistance and
Easy asphalt emulsions have been used. But
When asphalt emulsion is used as a processing agent,
After hardening, cracks occur on the soil surface, causing erosion
And the appearance of the treated area is poor.
A strong film is formed by the emulsion, making plant growth difficult.
There is a disadvantage that it becomes difficult. In recent years, polyvinyl acetate, ethylene-vinyl acetate
Nyl copolymer, anionic or nonionic acrylic copolymer
Aqueous dispersions such as polymers are used as soil stabilizing agents
Attempts have been made to use polyvinyl acetate.
When used, it can impart sufficient water resistance to the soil surface.
In addition, when the amount of rainfall increases, soil runoff tends to occur. Ma
When using an ethylene-vinyl acetate copolymer,
At the beginning of construction, a film is formed on the soil surface to stabilize the soil.
Although the effect is exhibited, the film deteriorates over time and
Cracks occur and soil erosion tends to occur
You. Also, anionic or nonionic acrylic copolymer
When using the body, use a small amount to prevent soil runoff
To prevent soil runoff due to insufficient effect
Must be used in large quantities to form a tough film,
There is a problem that the cost increases. Further, these aqueous dispersions are used
If there is, a tough film with resin solidified on the soil surface
It is formed and tends to hinder seed germination and post-emergence growth
There are also problems. [0005] The main object of the present invention
Stabilizes the soil surface and imparts good water resistance,
Soil stabilizing composition that can effectively protect against erosion by wind and rain
Material, and the soil after construction is air-permeable and water-permeable
Is good, flexible and has no adverse effect on seed germination and growth.
To provide a soil stabilizing composition
You. [0006] The present inventor has set forth the above-mentioned eye.
We have been working hard to achieve our goals. As a result,
Has not been used as a soil stabilizer since
Cationic acrylic resin emulsion as active ingredient
When using the blended composition as a soil stabilizer,
Stable soil by using a small amount of resin and erosion by wind and rain
The soil after treatment can be protected from aeration
It has good properties and water permeability, is flexible and is suitable for seed germination and growth.
And found that there would be no negative impact.
Thus, the present invention has been completed. That is, the present invention relates to an alkyl acrylate
At least one of ter and alkyl methacrylate
Copolymer of seed and amino group-containing acrylic monomer
Contains the resulting cationic acrylic resin emulsion
And a soil stabilizing composition. The composition for stabilizing soil of the present invention comprises an essential component
As acrylic acid alkyl esters and methacrylic acid
At least one alkyl ester and an amino group-containing
Cationic copolymers obtained by copolymerizing
It is necessary to contain a krill resin emulsion.
Using such a specific cationic acrylic resin emulsion
The soil to stabilize it with a small amount of use
It can form a water-based soil surface layer,
Soil can be effectively protected from erosion due to this. Ma
In addition, the soil after treatment with the soil stabilizing composition of the present invention
Is excellent in breathability and water permeability, flexible and contained in soil
There is almost no adverse effect on the germination and growth of seeds.
Therefore, the composition for stabilizing soil of the present invention provides the conventional treatment.
Compared to the case where a physical agent is used, the soil and
It becomes possible to green the vegetation. By using the soil stabilizer of the present invention,
It is not always clear why these effects are so effective
But the acrylic resin cation ion that has permeated the soil
Agglomeration layer that is breathable by combining with fine particles
And furthermore strongly binds to ground anions,
A stable stratum resistant to wind and rain can be formed on the soil surface.
It is presumed to be due to In addition, with less consumption
Since a sufficient soil stabilization effect can be obtained,
No thick resin layer is formed on the surface of the soil, breathable
And water permeability are sufficiently maintained, which has a negative effect on plant growth
It is considered to have no effect. The cationic acrylic resin used in the present invention
The emulsion is composed of alkyl acrylate and meta
At least one alkyl acrylate and an amino group
Is obtained by copolymerization with the acrylic monomer
is there. The raw material alkyl acrylate and
Various types of alkyl acrylate are used.
For example, specific examples of acrylic acid alkyl esters
As methyl acrylate, ethyl acrylate,
Butyl acrylate, 2-ethylhexyl acrylate
G, hydroxypropyl acrylate, β-ethoxy
Use tyl acrylate, glycidyl acrylate, etc.
be able to. In addition, alkyl methacrylate
Specific examples include methyl methacrylate and ethyl methacrylate.
Relate, butyl methacrylate, 2-ethylhexyl
Methacrylate, hydroxypropyl methacrylate,
β-ethoxyethyl methacrylate, glycidyl methac
Related may be mentioned. These monomers are
They can be used alone or in appropriate combination. Departure
In light of this, where necessary, alkyl acrylate
Or other copolymerizable with alkyl methacrylate
A monomer may be added for copolymerization. Things like this
Vinyl acetate, styrene, acrylonitrile
And vinyl chloride such as vinyl chloride.
Alkyl acrylate and alkyl methacrylate
Add to about 1/1 (weight ratio)
Can be. [0012] The cationic acrylic resin emulsion is
In order to get the emulsion to be cationic,
In addition, amino group-containing acrylic based cationic monomers
It is necessary to carry out the polymerization reaction in the presence of the monomer.
You. The amino group-containing acrylic monomer is represented by the general formula: (Wherein R ₁ Is hydrogen or a methyl group, R _Two Is
C ₁ ~ C ₆ An alkylene group of R _Three And R _Four Is hydrogen or C
₁ ~ C ₆ Which represents an alkyl group)
Killed (meth) acrylate and / or general formula (Wherein R ₁ Is hydrogen or a methyl group, R _Two Is
C ₁ ~ C ₆ An alkylene group of R _Three And R _Four Is hydrogen or C
₁ ~ C ₆ Which represents an alkyl group)
Alkyl (meth) acrylamide can be used
You. The amount of cationic monomer used depends on the desired emulsion
It may be determined according to the properties of the
But usually 1-5% by weight, based on all monomers
The degree is preferred. Specific examples of the cationic monomer include:
Aminoalkyl (meth) acrylate of the general formula (I)
Dimethylaminoethyl acrylate, dimethylamino
Noethyl methacrylate, dimethylaminopropyl
Acrylate, dimethylaminopropyl methacrylate, t
-Butylaminoethyl acrylate, t-butylamino
Ethyl methacrylate, monomethylaminoethyl acryl
Rate, monomethylaminoethyl methacrylate, etc.
I can do it. N-aminoalkyl of the general formula (II)
(Meth) acrylamide includes dimethylaminopro
Pyracrylamide, dimethylaminopropyl methacryl
Luamide, dimethylaminoethylacrylamide,
Tilaminoethyl methacrylamide and the like can be exemplified. The cationic monomer is neutralized by an acid.
Used. Neutralization degree (acid / cationic monomer (mol
Ratio)) is about 0.2 or more,
Accordingly, it can exceed 1. Specifically, the degree of neutralization
The higher the level, the higher the hydrophilicity, and the lower the degree of neutralization, the lower the milk
The weakening power tends to decrease the polymerization stability.
The nature and use of the comonomer and surfactant used
The degree of neutralization may be determined according to the amount and the like. As the acid used for neutralization, various inorganic acids
Or an organic acid can be used, and as the inorganic acid, a salt
Acid, sulfuric acid, phosphoric acid, nitric acid, etc. can be used.
Is, for example, formic acid, acetic acid, propionic acid, succinic acid,
Enic acid, malic acid and the like can be used. The cationic acrylic resin emulsion is
The polymerization method for obtaining may be in accordance with a usual emulsion polymerization method.
And, for example, a main monomer, a cationic monomer and
A method of batch charging and polymerizing other raw materials,
Various methods are possible, such as a method of polymerizing while supplying continuously.
Yes, there is a way to achieve the desired
A thionic emulsion can be obtained. Also continuous
When supplying, each component may be added alone,
Desired components may be mixed in advance and added. The polymerization reaction is
Perform under heating, usually at about 50-85 ° C
Just fine. In the above-mentioned polymerization of the emulsion,
To ensure the stability of the resulting emulsion,
Add on surfactant and / or cationic surfactant
Is preferably added. As a nonionic surfactant
Is preferably a polyethylene oxide surfactant,
Specifically, polyoxyethylene lauryl ether,
Lioxyethylene cetyl ether, polyoxyethylene
Stearyl ether, polyoxyethylene oleyl A
Ter, polyoxyethylene nonyl ether, polyoxy
Ethylene nonyl phenyl ether, polyoxyethylene
Sorbitan monolaurate, polyoxyethylene sorby
Tanmonostearate, polyoxyethylene sorbitan
Monooleate, oxyethylene oxypropylene bro
And the like. As the cationic surfactant, lauryl is used.
Trimethylammonium chloride, stearyl trime
Thilammonium chloride, polyoxyethylated aluminum
Killamine, amine oxide derivative, alkyl trim
Tylenediamine, distearyl dimethyl ammonium chloride
Chloride, alkylbenzyldimethylammonium chloride
Examples include a ride, a 1,2 or tertiary amine derivative. Among these surfactants, particularly,
HLB in terms of good qualitative, mechanical and chemical stability
Oxide-based nonionic interface with a value of 14 or less
Preferably, an activator is used. The amount of the surfactant used depends on the emulsion.
May vary depending on the properties required, but generally
For the purpose of improving the joint stability and suppressing the generation of coarse particles,
Purpose of improving mechanical and chemical stability of emulsion
It is preferable to use a large amount of surfactant,
To improve the water resistance of the film, use a small amount
And usually 1 to 10% by weight based on all monomers.
You can decide the amount of use according to the purpose from within the range
No. In producing the emulsion, a polymerization reaction
Nonionic catalysts and cationic catalysts
Any medium can be used, but the cationic catalyst 2,
Use of 2'-azobis (2-aminodipropane)
Is preferred. The resulting cationic acrylic resin emulsion
Although the polymer particle size of the coating is not particularly limited,
About 1 to 2.0 μm is appropriate, and 0.2 to 1.0 μm
The degree is preferred. Emulsion viscosity is also particularly limited
However, usually, about 10 to 100,000 cp is appropriate.
This is appropriate, and about 100 to 50,000 cp is preferable. In the present invention, the above-mentioned cationic acrylic
Any resin emulsion can be used
In particular, the glass transition point (Tg) is about 0 to -30 ° C.
The cationic surfactant obtained by blending each component so as to be within the range of
It is preferable to use a krill resin emulsion. this
When using a resin having a glass transition point in the range,
After treatment, the soil becomes moderately flexible,
Erosion can be sufficiently prevented, and it is
Without any adverse effects on The cationic acrylic resin emulsion
The solution has good stability over a wide pH range,
PH suitable for its growing environment, depending on the type of plant in the soil
Excellent feature that can be used by adjusting to the range
It has. Usually, as a plant growth environment
Is generally suitable for pH around neutral,
Adjusted to near pH 5.5 to 7.5 for use
Is preferred. The cationic acrylic resin emulsion
Is generally adjusted to an appropriate resin concentration during construction.
Therefore, the concentration of the resin component during the production is not particularly limited
However, the cationic acrylic resin emulsion has stability.
Is good, so high concentration can be achieved.
If the resin concentration is relatively high, about 40 to 65% by weight
Adjustment can reduce transportation costs, etc.
You. The composition for stabilizing soil of the present invention has the above-mentioned composition.
Cationic acrylic resin emulsion as an essential component
The resin concentration is not particularly limited.
No, if it is adjusted appropriately according to the condition of the soil at the construction site etc.
Good, but usually, at the time of construction, in the soil stabilizing composition
Resin concentration of cationic acrylic resin is 1 to 10% by weight
It is appropriate to dilute with water to
You. The soil stabilizing composition of the present invention is used for erosion by wind and rain.
Use only for the purpose of preventing soil runoff based on
Is a relatively high concentration aqueous dispersion within the above range
It can be used as
In the case of greening by growing plants,
If the concentration is too high, the air permeability and water
When the permeability of the soil decreases and the growth of the plant is adversely affected
There is. Therefore, greening due to soil stabilization and plant growth
When used for both purposes, the resin concentration is 2 to 4 times
It is preferable to use it in an amount of about%. The composition for stabilizing soil of the present invention has the above-mentioned composition.
Specific cationic acrylic resin emulsion
Although it is contained as an ingredient,
Traditionally used for soil stabilization and greening
Various types of soil greening (stabilizing) compositions
Materials, so-called vegetation materials, can be blended. this
Specific examples thereof include, for example, park compost, mulch, and compost.
Organic fertilizers such as manure, advanced chemical fertilizers, isobutyraldehyde
Chemical fertilizers such as chemical urea compound fertilizers (IB slow-release fertilizers)
Fertilizers, etc .; Kentucky bluegrass, weeping
Buglas, White Clover, Bermudagrass, Ben
Tograss, Highland perennial ryegrass, creepy
Pulp fiber, pea
Fibers such as tomos; sieve soil, sand soil, bentonite, etc.
Soil base material: Malachite green, cyanine green, etc.
Coloring agents; water retention agents such as water-absorbing polymers;
You. The amounts of these components are not particularly limited, and the present invention
Range that does not hinder the workability of soil stabilizing composition
, Depending on the type of each component, exerts its compounding effect
What is necessary is just to adjust suitably so that it may become the amount which can be performed. These manure
The composition for soil stabilization of the present invention comprising
If the soil is stabilized,
Greening can be performed. The soil stabilizing composition of the present invention includes
In addition to the cationic acrylic resin emulsion, fibers
Is preferably blended. By blending fibers
The effect of soil stabilization by acrylic resin emulsion
In addition to fiber, fibers become entangled on the soil surface,
By immobilizing with a resin emulsion
Can prevent soil runoff etc. more effectively
You. There are no particular restrictions on the type, size, etc. of fibers
Can be used, but the fiber length is short.
It can be effective enough to prevent soil runoff
If the length is too short, the construction work will be difficult.
Select the appropriate type according to the construction equipment and soil conditions.
Just fine. Usually, the length is about 5 to 60 mm, preferably 1
Fibers of about 0 to 40 mm and diameter of about 0.5 to 3 mm
Should be used. Types of fibers that can be used in the present invention
There is no particular limitation, and various types can be used.
Specific examples include peat moss, pulp fiber, par
Vegetable fiber such as rubber fiber, polyvinylidene chloride,
Various plastic fibers such as tellurium, steel fiber, etc.
Metal fiber, ceramic fiber, carbon fiber
-And the like. The amount of fibers is not particularly limited.
No, but usually 1 to 20 in the soil stabilizing composition at the time of construction
% By weight, preferably about 4 to 11% by weight.
No. Of the above-mentioned fibers, vegetable fibers, pulp
When using flexible fibers such as plastic fibers
Prevents the soil from becoming too hard,
The adverse effect on the growth of the product can be reduced. Special
If vegetable fibers are used as fibers,
At first, it effectively exerts the effect of preventing soil runoff,
Over time, the seeds of the plants in the soil germinate and grow,
After being decomposed, it is decomposed and assimilated with soil, which has a negative impact on the environment.
Is not preferred. [0034] The composition of the present invention may be composed of gravel stems.
Cutting stems of growing plants (hereinafter referred to as "vegetative plants")
When blending materials, the flow of soil is
At the same time as having the effect of preventing emergence,
Germination from the plant is fast and the fertility is high.
The runes can spread and the whole can be greened early.
Therefore, incorporation of cut stalks of gravel plants
Therefore, along with stabilization of the construction surface, the entire construction surface can be
Greening is possible, for example, by various methods in the usual way
Very simple and economical compared to growing grass
It is possible to green the construction surface in an advantageous and early
You. [0035] Grape plants that can be used for such purposes
There is no particular limitation, the stems are grape-like and have high fertility
The specific examples are wedelia and tea.
Futon (Chipton Shiva), Noshiba, St. Augustine
Grass (Inuushiba), Kouraishiba (Koshihunshi)
B), red top, bentgrass highland, white
Toklover, bahiagrass, etc. can be exemplified, but particularly preferred are
Good things are Wedelia, Nosyba, St. Augustine
The stems of graveling plants such as blackgrass (doggrass) are easily cut and processed,
Similarly, the length is about 5 to 60 mm, preferably 10 to 4 mm.
It may be cut to about 0 mm and blended into the composition of the present invention.
No. The blending amount is usually the same as when
About 1 to 20% by weight in the soil stabilizing composition, preferably
May be about 4 to 11% by weight, and may be distributed simultaneously with the fibers.
If they are combined, the combination of fibers and cut stem plant
What is necessary is just to make it weigh in the said range. Using the soil stabilizing composition of the present invention,
There is no particular limitation on the method of performing the stabilization processing.
As with the usual treatment for soil stabilization,
Appropriate method for applying the composition diluted to the concentration suitable for construction
Spraying, for example, spraying with a hydro sheeter
What is necessary is just to spray on the target soil using a machine. Spray amount
Can be adjusted appropriately according to the construction site, but usually
0.5 to 50 k as the resin component of the thion acrylic resin
g / 100m ^Two It is sufficient to make the degree. It is subject to stabilization by the composition of the present invention.
Soil is not particularly limited, but usually immediately after
Anxiety of erosion due to wind and rain on soil and non-vegetable fabric
It can be effectively applied to constant soil. In particular, created
The slope immediately after it is very susceptible to erosion by wind and rain
However, by using the composition of the present invention,
Erosion can be effectively prevented. According to the composition for stabilizing soil of the present invention,
Stable soil by using a small amount of resin and erosion by wind and rain
The soil after treatment can be protected from
It is water-based and flexible, and is suitable for seed germination and growth.
There is no adverse effect at all. Further, the composition of the present invention may contain
When cut material is mixed, it has the effect of preventing soil runoff.
It is said that it germinates quickly and is highly reproductive at the same time
Due to the nature of vegetative plants, greening the construction surface early
Can be. The present invention will be described in more detail with reference to the following examples.
I will tell. In each of the production examples and examples,
Cationic acrylic resin emulsion is
50 parts by weight of related and 2-ethylhexyl acrylate
68 parts by weight of dimethylaminomethacrylate hydrochloride
5 parts by weight of 2,2′-azobis (2-amidinopropa
G) in the presence of 0.2 parts by weight of dihydrochloride and 80 parts by weight of water
Is obtained by emulsion polymerization at 75 ° C.
, Resin content concentration 60%, viscosity 3000cp, pH6.
0, having a polymer glass transition point (Tg) of -10 ° C
It is. Production Example 1 The above cationic acrylic resin emulsion was used.
The following components are added to and mixed with a kneader-type stirrer.
Thus, a composition for stabilizing soil was prepared. Cationic acrylic resin emulsion (resin content 60%) 4.0 parts by weight Seed (* 1) 0.8 parts by weight Advanced chemical fertilizer 5.9 parts by weight Pulp fiber 4.0 parts by weight Grave plant stem 5.9 parts by weight Colorant (cyanine green, malachite green) 0.4 parts by weight Water 79.0 parts by weight Total 100 parts by weight Note (* 1) 1 weeping grab glass, Kentucky-31 Mixed seeds of fescue and white clover (* 2) Mixture of cut pieces of stalks of goldengrass and Wedelia (about 30 mm in length) Production Example 2 Replaced with cut pieces of stems of vegetative plants used in Production Example 1.
Use the same amount of cut peat moss (length about 30mm)
The same procedure as in Production Example 1 was carried out except that
A composition was prepared. Example 1 8 liters of Kanto loam, 1.5 liters of water, and peat
1.5 liters of moss is mixed and stirred, and the inclination angle is 45 degrees.
Filled into a form of 30 × 30 × 5cm (medium tortoise shell wire mesh)
After that, leave it indoors for 7 days, then sown 5g of seeds,
The soil was covered lightly and the soil surface was lightly pressed to obtain test soil. The above cationic acrylic resin emulsion
(Resin content 60% by weight), and a resin content of 0, 1, 2, 3
And 4% by weight after dilution with water.
For each dilution, add 30 to each test soil.
0 g (amount of the diluent) was uniformly sprayed to obtain a specimen. As a comparison, anionic acrylic
Marjon (Comparative Example 1) and nonionic ethylene acetate
Each of the nyl copolymer emulsions (Comparative Example 2) was used.
To prepare a diluent having a resin content of 0 to 4% by weight,
Prepare test specimens evenly sprayed on the test soil in 300g increments.
Was. A test treated with the soil stabilizer in this way
Erosion resistance test and soil hardness measurement
Each test was performed, namely, a test for determining the air permeability and a test for germination. result
Are shown in Tables 1 to 3 below. * Erosion resistance test Leave in indoor constant temperature room at 20 ° C and 60% RH for 7 days.
After a rainfall of 200m / h from a height of 3.0m
A rainfall test by rain was performed. From the start of the test to the start of runoff of the surface soil
Measurement, and the outflow prevention rate 3 hours after the start of the test.
(Leakage prevention rate = amount of residual soil / amount of specimen soil before test)
Was. * Soil hardness measurement Leave in a constant temperature room at 20 ° C. and 60% RH for 7 days.
And then measure the soil surface hardness using a Yamanaka soil hardness meter
did. * Air permeability test A specimen similar to the erosion resistance test was prepared, and was placed in an indoor constant temperature room.
After leaving for 24 hours at 0 ° C. and 60% RH,
50mm in diameter and 300mm in length so as to be perpendicular to the slope of
150mm embedded glass cylinder with powder at the tip
Silica gel was attached and sealed. After 24 hours,
Measure the weight of the Rica gel and compare it with the silica gel weight before the test.
The difference was taken as the water absorption. Absorption against silica gel weight before test
The proportion (%) of the water amount was measured as the underground water evaporation rate. Earth
It can be said that the higher the medium moisture evaporation rate, the better the air permeability. * Sprouting test A test specimen similar to the one used in each of the above tests was placed on the morning and evening 2
Sprinkle water and observe the germination state 2 weeks later.
The percentage of germinated areas during stacking was determined. [Table 1] [Table 2] [Table 3] As is clear from the above results, the present invention
Soil treated with the composition has good erosion resistance and breathability
Excellent, yet flexible and has no adverse effect on plant germination and growth
It turns out to be something. Example 2 A slope having a slope angle of 30 degrees after the formation (Setagaya-ku, Tokyo)
The composition for stabilizing soil obtained in Production Example 1 was mixed with a resin having an amount of about 6
kg / 100m ^Two Was sprayed so that
(Due date: April 8, 1994). After treatment, the soil
Germinated about 5 days after sowing without erosion
The whole area was green in a short while. Similarly, the soil stability obtained in Production Example 2 was obtained.
The composition for stabilization was sprayed on the same slope.
In addition, the treated soil is not eroded by
It germinated about 7 days later, and the whole plant was greened in about 4 weeks. [0059]

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Nobuaki Hiranaka 1-13-1 Akebono, Naha-shi, Okinawa Toyoshinkai Departing Akebono Building 403 Hiranakanai Co., Ltd. (72) Inventor Shinichi Yokoe Hirakata-shi, Osaka No. 1-13 Sumida, Chuo Rika Kogyo Co., Ltd. (56) References JP-A-48-95987 (JP, A) JP-A-62-22882 (JP, A) JP-A-57-59983 (JP, A) (58) Fields surveyed (Int. Cl. ⁷ , DB name) C09K 17/00-17/52 C09K 101: 00

Claims (1)

(57) and at least one of the Claims 1 acrylic acid alkyl esters and methacrylic acid alkyl esters, cationic acrylic resin emulsion obtained by copolymerizing an amino group-containing acrylic monomer, and葡Grow on a stalk
A composition for stabilizing soil, comprising a cut product of a stem of a plant .