KR20010083519A - Poly arcrylate polymer for scale inhibition and the method of preparing said polymer - Google Patents

Abstract

The present invention is a polymer compound that prevents corrosion, scale and dirt of a metal surface in which a cooling water system or a boiler water system is in contact with water, in various industrial equipments such as a heat exchanger and the like that require cooling water or boiler water. A high molecular copolymer represented by the formula (I), and relates to a novel polyacrylate copolymer having excellent scale suppression and anti-corrosion effects, and a method for producing the same.

In order to achieve the above object, the present invention used acrylic acid or (meth) acrylic acid at 45 to 90% by weight of the total monomers, and as functional monomers, acrylamide sulfonic acid compound and allyloxy compound, respectively, at a ratio of 5 to 50%. The method of the present invention was carried out using a free radical polymerization initiator and a polymerization regulator.

Description

Polyacrylate polymer for preventing scale and manufacturing method thereof {POLY ARCRYLATE POLYMER FOR SCALE INHIBITION AND THE METHOD OF PREPARING SAID POLYMER}

The present invention is a polymer compound that prevents corrosion, scale, and contamination of metal surfaces in which a cooling water system or a boiler water system comes into contact with water in various industrial equipments such as a heat exchanger, which requires cooling water or boiler water. The high molecular polymer represented by Formula (I) relates to a new polyacrylate polymer having excellent scale suppression and corrosion prevention effects and a method for producing the same.

In the above formula, l, m, n are integers of 5 to 1000, R ₁ , R ₂ , R ₄ are the same as or different from each other, a hydrogen atom or a methyl group, R ₃ is a C1-8 alkylene group or 1 to 8 carbon atoms Substituted alkylene groups, R ₅ is an alkylene group substituted with 3 to 6 alkylene groups or a hydroxy group, X is an amine or an oxygen atom, Y is an alkyl group having 1 to 3 carbon atoms, or a carbonyl group, and Z is an amine or Oxygen atom, M represents hydrogen ion, sodium, potassium, or ammonium salt.

Generally, water supplied to water-cooled heat exchangers and other cooling water systems contains relatively poorly soluble inorganic salts such as calcium or magnesium carbonates, lactates and silicates, and small amounts of suspended solids.

In a cooling water system, the cooling effect is achieved by evaporating a portion of the water passing through the cooling tower, but inorganic salts or suspended substances dissolved in the replenishment water in the amount consumed by evaporation continue to be concentrated in the circulating water, and Soluble inorganic salts precipitate on the heat transfer surface of the heat exchanger and become a scale.

Representative components of these scales include calcium-based scales such as calcium carbonate and calcium phosphate, and zinc-based scales such as zinc phosphate, zinc carbonate, zinc sulfate, and zinc hydroxide, and the suspended materials of soil, clay, and organic matter in the slow flow rate. Sediments such as are attached to the heat exchanger and become dirty.

Metal parts constituting an industrial heat exchanger or cooling water system are corroded by dissolved oxygen in neutral water, and in particular, in areas where scales or contaminants are attached, local corrosion occurs due to the formation of oxygen concentrating cells.

These scales, fouling, and corrosion-prone deposits interfere with the effective heat conduction of various industrial equipments requiring cooling water or boiler water, such as heat exchangers, or reduce cooling water circulation due to pressure loss, that is, decrease in cooling efficiency. In some cases, such as a clogging phenomenon or a rupture of a pipe due to local corrosion, a serious obstacle such as the need to stop the operation occurs.

As a conventional method for preventing corrosion or scale, there is a method of lowering the pH of the water by adding acid to the water first, but corrosion of the device by acid cannot be avoided, and the inorganic salts in the water react with each other to remove the inorganic salts. Adding a chelating compound, such as EDTA, which can disperse them evenly into the solution to prevent them from forming, may have some effect, but it is necessary to add a large amount of chelating compound to sufficiently dissolve the dissolved inorganic salts. none.

And techniques for using nitrogen compounds such as various beta glycerin acids, polymer electrolytes, acrylic acid polymers, vinyl phosphonate polymers, maleic acid polymers, carboxylic acid polymers, acrylamide polymers, molybdates, zincates, and the like or mixtures thereof. have.

In other words, maleic acid and molybdate salts, acrylamide polymers and zinc salts, or maleic acid and acrylamide polymers may be used alone.

In addition, a method of adding an organic phosphate, ie, phosphono butyltricarboxylic acid, has been developed. The organic phosphate used here is known to have an excellent effect of inhibiting calcium phosphonate scale generation in water, but when the temperature rises, Phosphate is decomposed and the concentration of free phosphate in the water tends to increase, so that the dissolving ability of calcium phosphonate tends to be lowered. Moreover, the use of large amounts of these organic phosphates causes the problem of precipitation of insoluble calcium phosphonate on the surface of the device. .

There are chromium (VI) compounds which are in the form of oxidized lands as corrosion and scale inhibitors, but this is a problem of toxicity and pollution to the environment.

In addition, the polyvalent metal ions cannot maintain a predetermined polyion concentration in alkaline cooling water having a high pH, and may precipitate or scale up hydroxides, phosphates, and phosphonates of the polyvalent metal ions.

This phenomenon changes with the temperature of the cooling water, and increases with increasing calcium hardness and pH rise.

In addition, since such heavy metals are discharged to the outside, water pollution by heavy metals cannot be avoided.

Therefore, a method has been devised to obtain the effect of inhibiting corrosion and scale generation by using a polymer electrolyte instead of the conventional method using such heavy metals and organophosphors. No. 3,898,037 has developed a method of using (meth) acrylamide alkylsulfonic acid and acrylic or (meth) acrylic acid copolymers as corrosion and scale inhibitors, but this copolymer is a chain transfer agent in a mixture of isopropyl alcohol and water. agent) to synthesize a monomer by copolymerization.

US Patent NO. In 3,928,196, 2-acrylamide-2-methylsulfonic acid and acrylic acid monomers were synthesized in a lower alcohol and water mixed solvent using a copolymerization method.

This copolymer has the effect of inhibiting scale formation and precipitation in aqueous systems such as industrial water, and is known to be particularly effective in suppressing the formation of poorly soluble scales such as calcium carbonate and calcium sulfate.

A method of using a composition of acrylic acid, a lower alkyl hydroxy acrylate copolymer and an alkylphenoxypoly ethoxyethanol compound as an inhibitor of scale is described in US Pat. 4,326,980 is described in detail.

According to this method, when the above-mentioned composition is added to the aqueous system of industrial cooling water, it is not only excellent in suppressing the generation of inorganic scales such as calcium carbonate, calcium phosphate and calcium sulfate, but also solid substances such as iron oxide and clay dissolved in the water. It is also known to have excellent efficacy in uniformly dispersing organic matters such as oil and oil in water.

Recent US Patent NO. 5,601,723 has developed a scale and corrosion protection method in water systems using low molecular weight polymer compounds.

In this method, the copolymer was synthesized using a free radical polymerization process using acrylic acid and maleic anhydride monomer in an aqueous solution using at least one chain transfer agent, a water-soluble initiator and a metal promoter.

This copolymer is shown to have a great effect of suppressing the generation of a calcium-based scale in an aqueous system using industrial water having a high calcium hardness.

As described above, various corrosion and scale inhibitors have been developed, and the addition amount of the corrosion and scale inhibitors needs to be determined according to the temperature of the cooling water, and at the same time, it is necessary to use cooling water having a low calcium hardness and a pH adjusted.

However, in the actual industrial cooling water system, there is a heat exchanger having a different water temperature in one system, and a tendency to operate with a high concentration, that is, a relatively high calcium hardness, due to the requirement of saving water and reducing the amount of drainage in the cooling water system. Because of this, a polymer electrolyte having a large effect of preventing corrosion and scale should be used.

The present invention is to provide a novel water treatment polymer compound and a method for producing the same, which have an excellent anticorrosive effect and scale formation inhibitory effect by improving the above-mentioned general drawback of water treatment.

In other words, by introducing an allyloxy sulfonic acid derivative to a part of the acrylic acid-acrylamide sulfonic acid copolymer described above, a scale such as calcium phosphate, calcium carbonate, calcium sulfate, and the effect of preventing the formation of skeletons such as zinc or iron hydroxide are significantly improved. A polymer electrolyte and a method of manufacturing the same are provided.

In the above formula, l, m, n are integers of 5 to 1000, R ₁ , R ₂ , R ₄ are the same or different from each other, a hydrogen atom or a methyl group, R ₃ is a C1-8 alkylene group or C1-8 Substituted alkylene groups, R ₅ is an alkylene group substituted with 3 to 6 alkylene groups or a hydroxy group, X is an amine or an oxygen atom, Y is an alkyl group having 1 to 3 carbon atoms, or a carbonyl group, and Z is an amine or Oxygen atom, M represents hydrogen ion, sodium, potassium, or ammonium salt.

1: Comparison of calcium phosphate production inhibitory power of the polymer of the present invention

Hereinafter, the technical configuration and operation of the present invention will be described.

Acrylic acid or (meth) acrylic acid represented by formula (I) was used at 45 to 90% by weight of the total monomers, and acrylamide sulfonic acid monomer represented by formula (II) was used at a ratio of 5 to 50%.

M is an integer of 5 to 1000, R ₂ is a hydrogen atom or a methyl group, X is an amine or oxygen atom, R ₃ is a substituted or unsubstituted alkylene group having 1 to 8 carbon atoms, M is hydrogen, sodium, potassium, ammonium Ion.

The allyloxy compound (formula III) introduced into a part of the acrylic acid-acrylamide sulfonic acid copolymer represented by the general formula (I) was used at a ratio of 5 to 50%.

N is an integer of 5 to 1000, R ₄ is a hydrogen atom or a methyl group, R ₅ is an alkylene group substituted with an alkylene group or a hydroxy group having 3 to 6 carbon atoms, Y is an alkylene or carbonyl group having 1 to 3 carbon atoms, Z is an amine or oxygen atom, and M represents a hydrogen ion, sodium, potassium, or ammonium salt.

This copolymerization reaction starts by adding well-known free radical polymerization catalysts.

Hydrogen peroxide is basically used, but it is also used alone or mixed with peroxide-based potassium and calcium peroxides, organic initiators such as benzoyl peroxide or cumenyl peroxide and azobisisobutyronitrile, and redox catalysts. The use of the initiator is selected according to the type of solvent used at the reaction temperature, and the amount of the initiator is about 0.1 to 10% based on the total weight of the monomer to be polymerized, and preferably 1 to 7%.

This high molecular compound is prepared using a polymerization regulator, which is added to the reaction solvent by a simple method.

As the polymerization regulator used herein, a lower alcohol having 1 to 4 carbon atoms, that is, isopropyl alcohol alone or at least 40% or more may be used in admixture with water.

Unsaturated alcohols such as butenol are also known as good polymerization regulators, and mixtures of lower alcohols, ie ethanol and isopropanol, ethanol and butanol, or isopropanol and butanol are suitable as copolymerization medium for the monomer mixtures mentioned above, but also with acetone. The same ketones are also used as cosolvents, preferably about 30% or more of the total solvent.

And the most effective polymerization regulators are hydroxy ammonium salts such as hydroxy ammonium sulfate or hydroxy ammonium salts substituted with alkyl groups, or hydroxyethyl, n-dodecyl, -t-dodecyl, octyl, tetradecyl, hexadecylmer And thioesters such as captanes, butylthioglycolate, isooctylthioglycolate, and dodecylthioglycolate.

This compound is usually used in the range of 1 to 35% based on the monomer mixture to be polymerized.

In preparing the copolymer, monomers participating in the reaction are premixed and injected into the reactor, or each monomer is injected separately.

At this time, the monomers represented by the general formulas (II) and (III) should be neutralized in part or in whole with caustic soda, caustic solution or ammonia solution.A suitable polymerization inhibitor is used to prevent monomer polymerization due to temperature rise of the monomer tank during the reaction. To use, an appropriate amount is about 100 to 1000PPM.

During the polymerization process, each monomer is separately injected into the polymerization reactor, or 10-30% of the entire monomer is pre-filled in the reactor, and the reaction proceeds by injecting the catalyst and the remaining monomers. The reaction time is approximately 2 to 4 hours. Do.

After completion of the reaction, the remaining catalyst is injected to completely polymerize the unreacted monomer and then aged at about 1 to 2 hours at the initial reaction temperature.

Although the polymerization temperature of the said copolymer is not specifically determined, It is determined by the solvent used, a polymerization initiator, etc., Usually, it carries out in 60-120 degreeC, Preferably it is 60-100 degreeC.

When using a redox catalyst, a relatively low temperature, ie, 50 to 75 ° C., is suitable.

In general, however, the reaction temperature is acceptable to react near the break point of the solvent used.

The polymerization is usually carried out at atmospheric pressure, but when it is necessary to control the reaction temperature and the molecular weight distribution, the polymerization reaction is carried out by applying a pressure of about 1 to 20 bar in the reactor.

If isopropyl alcohol or isopropyl alcohol-water mixed solvent and acetone, ethanol, etc. are used as co-solvent during the copolymerization reaction, the organic solvent is completely removed from the vacuum distillation, and the recovered organic solvent is reused.

After complete removal of the organic solvent, solids control and pH control of the reaction product are controlled by addition of a predetermined caustic soda, caustic or ammonium solution.

When neutralizing the reaction mixture by adding an alkali solvent, the temperature of the reactor should not exceed 60 ° C., and it is usually appropriate to adjust the pH range to 2-10, preferably 3-8.

After completion of neutralization, water is added if necessary to adjust the solids.

The solid content in the reaction after the reaction is adjusted to 30 to 60% by weight, preferably 40 to 60% by weight, based on the total reaction mixture.

The weight average molecular weight (Mw) of the polymer compound developed by the method of the present invention was measured using GPC using polyacrylic acid (Mw 4,500) as a standard in the range of 1,000 to 30,000 and most preferably 1,000 to 10,000.

Moreover, the molecular weight distribution map of this high molecular compound became 2.5 or less, Preferably it became about 2.0.

The polyacrylic acid copolymer developed by the method of the present invention is used to prevent scale formation and corrosion prevention of cooling circulation systems used in cooling towers, boilers, desalination plants, sugar collection plants, oil wells, reverse osmosis processes, steam tower plants, and heat exchangers. effective.

Phosphorus-based compounds such as inorganic or organic phosphates or phosphonates, or metallic corrosion inhibitors such as zinc-based compounds are used in combination with the above-mentioned high molecular compounds for poorly soluble inorganic crystals and scale formation.

Hereinafter, an embodiment of the present invention will be described in detail.

The following examples illustrate a limited case to more specifically describe the contents of the present invention, but the scope of the present invention is not limited thereto.

Example 1

260 g of isopropyl alcohol and 140 g of distilled water are charged to a 1000 ml four-necked reactor equipped with a thermometer, agitator, reflux, catalyst and monomer injection device.

150 g of distilled water was added to a 200 ml neutralization tank equipped with a stirrer, a cooling device, and a dropping device, and 22.4 g of 2-acrylamide-2-methylpropanesulfonic acid was added to dissolve completely, followed by 1-allyloxy-2-hydroxysulfonic acid soda 44.8 g is mixed and then neutralized at 8.6 g of a 50% caustic soda solution at low temperature.

156.8 g of acrylic acid is prepared in another monomer tank.

The temperature of the reactor was raised to 80 ° C., and at this temperature, a solution of 9 g of sodium peroxide dissolved in 100 g of distilled water as a catalyst and each monomer were simultaneously injected for 3 hours.

After completion of the injection, the mixture was stirred at 80 ° C. for about 1 hour and then vacuum distilled to recover the isopropyl alcohol solvent.

The temperature of the reactor was lowered to room temperature and then neutralized with 83 g of a 50% caustic soda solution to prepare the following polymer polymer.

Example 2

260 g of isopropyl alcohol and 140 g of distilled water are charged to a 2000 ml four-necked reactor equipped with a thermometer, agitator, reflux, catalyst and monomer injection device.

150 g of distilled water is put into a 200 ml container, 22.4 g of 2-acrylamide-2-methylpropanesulfonic acid is added, and it melt | dissolves completely, and 44.8 g of 1-allyloxy-2-hydroxysulfonic acid soda are mixed.

156.8 g of acrylic acid is prepared in another monomer tank.

The temperature of the reactor was raised to 80 ° C., and at this temperature, a solution of 9 g of sodium peroxide dissolved in 100 g of distilled water as a catalyst and each monomer were simultaneously injected for 3 hours.

After completion of the injection, the mixture was stirred at 80 ° C. for about 1 hour and then vacuum distilled to recover the isopropyl alcohol solvent.

The temperature of the reactor was lowered to room temperature and then neutralized with 92 g of a 50% caustic soda solution to prepare the following polymer polymer.

Example 3

A 2000 ml four-necked reactor equipped with a thermometer, agitator, reflux, catalyst and monomer injection device is charged with 160 g of isopropyl alcohol and 140 g of distilled water.

22.4 g of 2-acrylamide-2-methylpropanesulfonic acid and 44.8 1-allyloxy-2-hydroxysulfonic acid soda are dissolved in 150 g of distilled water, followed by mixing 156.8 g of acrylic acid.

The temperature of the reactor was raised to 80 ° C, and a solution and a monomer solution in which 9 g of sodium peroxide was dissolved in 100 g of distilled water as a catalyst at this temperature were simultaneously injected for 3 hours.

After completion of the injection, the mixture was stirred at 80 ° C. for about 1 hour and then vacuum distilled to recover an isopropyl alcohol solvent.

The reactor was cooled to room temperature and neutralized with 91.6 g of a 50% caustic soda solution to prepare the following polymer polymer.

Example 4

300 g of isopropyl alcohol and 200 g of distilled water are charged into a 10 Kg polymerization reactor equipped with a thermometer, agitator, reflux, catalyst and two monomer injection devices.

180 g of distilled water was added to a 500 mL neutralization tank equipped with a stirrer, a cooling device, and a dropping device, and 38.0 g of 2-acrylamide-2-methylpropanesulfonic acid was completely dissolved, followed by 76.0 g of 1-allyloxy-2-hydroxysulfonic acid soda. The mixture was neutralized at a low temperature with 24 g of a 30% caustic soda solution, and then 0.0044 g of methoxyhydroquinone (about 80 ppm relative to the monomer) was added.

266 g of acrylic acid is prepared in another monomer tank.

The temperature of the reactor was raised to 80 DEG C, and at this temperature, 14.4 g of sodium peroxide was dissolved in 100 g of distilled water as a catalyst, and a solution and each monomer were simultaneously injected for 3 hours.

After completion of the injection, the mixture was stirred at 80 ° C. for about 1 hour and then vacuum distilled to recover the isopropyl alcohol solvent.

The temperature of the reactor is lowered to room temperature and neutralized with 235 g of 30% caustic soda solution.

988.78 g (yield about 98%) of polymer was prepared after solids adjustment (about 43%).

Comparative Example 1. Calcium phosphate scale production inhibitory effect test

A 500 ml beaker is filled with 100 ml of the CaCl ₂ .2H ₂ O solution described above, and 100 ml of Na ₂ HPO ₄ solution is slowly injected while stirring.

This mixed solution 1N NaOH solution was added dropwise and adjusted to pH 8.5.

When the desired pH is reached, a cloudy calcium phosphate scale is produced.

Take an appropriate amount of this solution and place it in the turbidity measuring cell to measure the initial turbidity.

Fill a 50 ml titration burette with a scale inhibitor (a solution of 1 g of active ingredient dissolved in 100 mL of distilled water) and prepare dropwise.

After dropwise addition, the mixture was stirred for 10 minutes and then the turbidity was measured.

Subsequently, the same experiments were performed on the scale inhibitors to be compared, and the calcium phosphate scale generation inhibitory effects were compared and displayed in graphs.

Comparative Example 2. Calcium phosphate inhibitory effect test

470 ml of distilled water having a specific resistance coefficient of 500 × 10 4 Pa, cm or more is taken in a 500 ml Erlenmeyer flask.

10 ml of CaCl ₂ · 2H ₂ O solution (Ca ²⁺ = 20ppm) prepared using a primary reagent is added and mixed well.

The anti-scale agent is added to this solution at a predetermined concentration (ppm) and mixed well.

5.0 ml of Na ₂ HPO ₄ solution (PO ₄ ^3- = 5 ppm) and 10 ml of NaHCO ₃ solution (CO ₃ ^2- = 60 ppm) prepared using a first-class reagent are added and mixed well.

The pH is adjusted to 8.5 using 1% sulfuric acid solution or 1% sodium hydroxide solution.

After the Erlenmeyer flask is completely sealed, it is left in a 60 ° C. constant temperature water bath for 40 hours.

After 40 hours, remove the Erlenmeyer flask from the constant temperature water bath and visually record the presence of turbidity or precipitation.

The test solution was changed to NO. Filter with 5c filter paper.

After the filtrate is cooled to room temperature, the concentration of phosphate ions in the filtrate is measured using a spectrophotometer.

Measure and record pII after the test.

This test is carried out by the method described above for other dispersants and compared.

Before and after the test, the difference in the concentration of phosphate ions in the test solution and the amount of phosphate precipitated during the test period as calcium phosphate crystals are calculated, and the inhibition rate of the scale inhibitor against precipitation is obtained by the following equation.

At this time, the phosphoric acid concentration of each sample is measured using the previously prepared calibration curve (absorbance with respect to PO ₄ ^3- ppm).

Where FA is the dispersing agent is added after the PO ₄ ³ ppm, in the test solution before the test taken FB is Na ₂ HPO ₄ solution in the PO ₄ ³ ppm, the FC ppm concentration of PO ₄ in the test solution at the time of the dispersing agent-free ³ Indicates.

The polyacrylate-based polymer compound thus prepared is a highly concentrated operation such as an open or closed circulation cooling water system, a hot water type (Betch type), a boiler water system, a geothermal water system, etc., in which a corrosion or scale failure generally occurs, particularly an open circulation cooling water system. As is the case, the dissolved salts are highly concentrated to become corrosive and at the same time, it is preferable to be used as a water-based water treatment agent that is easy to generate scale such as calcium salts, and by introducing an aryloxy sulfonic acid derivative into a part of the acrylate amide sulfonic acid copolymer, It is a new anti-scaling polyacrylate polymer that is excellent in scales such as calcium carbonate and calcium sulfate and in preventing scale formation such as zinc or iron hydroxide.

Claims (8)

Scale prevention polyacrylate polymer represented by the following general formula (I) In the above formula, l, m, n are integers of 5 to 1000, R ₁ , R ₂ , R ₄ are the same as or different from each other, a hydrogen atom or a methyl group, R ₃ is a C1-8 alkylene group or 1 to 8 carbon atoms Substituted alkylene groups, R ₅ is an alkylene group substituted by 3 to 6 alkylene groups or a hydroxy group, X is an amine or an oxygen atom, Y is an alkyl group having 1 to 3 carbon atoms, or a carbonyl group, and Z is an amine or It becomes an oxygen atom, M represents hydrogen ion, sodium, potassium, or an ammonium salt. Acrylamide sulfonic acid monomer represented by general formula (II), Method for producing a polyacrylate polymer for preventing scale represented by formula (I) characterized in that copolymerization with aryloxy compounds represented by formula (III) In the above formula, l, m, n are integers of 5 to 1000, R ₁ , R ₂ , R ₄ are the same as or different from each other, a hydrogen atom or a methyl group, R ₃ is a C1-8 alkylene group or 1 to 8 carbon atoms Substituted alkylene groups, R ₅ is an alkylene group substituted by 3 to 6 alkylene groups or a hydroxy group, X is an amine or an oxygen atom, Y is an alkyl group having 1 to 3 carbon atoms, or a carbonyl group, and Z is an amine or It becomes an oxygen atom, M represents hydrogen ion, sodium, potassium, or an ammonium salt. M is an integer of 5 to 1000, R ₂ is a hydrogen atom or a methyl group, X is an amine or oxygen atom, R ₃ is a substituted or unsubstituted alkylene group having 1 to 8 carbon atoms, M is hydrogen, sodium, potassium, ammonium Ion. N is an integer of 5 to 1000, R ₄ is a hydrogen atom or a methyl group, R ₅ is an alkylene group substituted with a C 3-6 alkylene group or a hydroxy group, Y is an alkylene or carbonyl group having 1 to 3 carbon atoms, Z is an amine or oxygen atom, and M represents a hydrogen ion, sodium, potassium or ammonium salt. The method of claim 2, wherein the raw material ratio of the compound used for the copolymerization reaction is 45-90% acrylic acid, 5-50% acrylamide sulfonic acid monomer, 5-50% aryloxy compound based on the total monomer weight. Process for preparing acrylate polymer The catalyst (initiator) used in the copolymerization reaction according to claim (2) is at least one catalyst selected from hydrogen peroxide, sodium peroxide, potassium peroxide, benzoyl peroxide, azobisiso, butyronitrile, and redox. Method for producing a polyacrylate polymer for preventing the scale The polymerization regulator according to claim 2, wherein the polymerization regulator used in the copolymerization reaction is a lower alcohol having 1 to 4 carbon atoms, unsaturated alcohols, buteneol, hydroxyammonium sulfate, hydroxyammonium salt, hydroxyethyl, n-dodecyl,- t-dodecyl, octyl, tetradecyl, hesadecyl mercury, butylthioglycolate, isooctylthioglycolate, dodecylthioglycolate alone or one or more mixtures thereof, or diluting them in distilled water Process for preparing acrylate polymer The copolymerization reaction according to claim (2), wherein the acrylamide sulfonic acid represented by the general formula (II) and the aryloxy compound represented by the general formula (III) are dissolved in distilled water and neutralized at room temperature at room temperature with alkali to give a copolymerization reaction. Method for producing a polyacrylate polymer for preventing the scale The method according to claim 2, wherein the copolymerization reaction is carried out at a temperature of 60-120 ° C. for a reaction time of 2-4 hours. The method according to claim 2, wherein the copolymerization reaction product is recovered from the solvent and neutralized with alkali at room temperature.