CN109608573B - Polyacrylic acid thickening agent and preparation method thereof - Google Patents
Polyacrylic acid thickening agent and preparation method thereof Download PDFInfo
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- CN109608573B CN109608573B CN201811562828.0A CN201811562828A CN109608573B CN 109608573 B CN109608573 B CN 109608573B CN 201811562828 A CN201811562828 A CN 201811562828A CN 109608573 B CN109608573 B CN 109608573B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
- D06P1/5207—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- D06P1/525—Polymers of unsaturated carboxylic acids or functional derivatives thereof
- D06P1/5257—(Meth)acrylic acid
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Abstract
The invention provides a preparation method of a polyacrylic acid thickening agent, which comprises the following steps: a) mixing an olefinic acid monomer, an alkali liquor, water, a cross-linking agent, an emulsifying agent and a solvent to obtain a mixed feed liquid; the acrylic monomer comprises one or more of acrylic acid, methacrylic acid, acrylamide, crotonic acid and maleic anhydride; b) homogenizing and emulsifying the mixed material liquid obtained in the step a) to obtain mixed emulsion; c) performing electron beam irradiation on the mixed emulsion obtained in the step b) to obtain a homogeneous paste; and concentrating to obtain the polyacrylic acid thickening agent. Compared with the prior art, the preparation method provided by the invention adopts the specific composition of mixed feed liquid, and carries out electron beam irradiation after homogenizing and emulsifying, so as to prepare the polyacrylic acid thickening agent; the preparation method does not need nitrogen gas for oxygen removal and initiator addition, can quickly synthesize the polyacrylic acid thickening agent at normal temperature, and the prepared product has high viscosity and stable performance.
Description
Technical Field
The invention relates to the technical field of thickening agents, in particular to a polyacrylic acid thickening agent and a preparation method thereof.
Background
The acrylic acid polymer compound is a synthetic thickener with high cost performance. The polyacrylic acid thickener is applied to the textile printing process, and has the advantages of deep color and high color paste utilization rate when being mixed with color paste for use. The thickening agent has small dosage, is easy to clean, has thixotropic viscosity, can reduce the viscosity under shear stress, and can restore the original viscosity when the stress is eliminated. This property allows the acrylic thickener to reduce in viscosity under blade pressure to facilitate penetration and to recover viscosity without flooding after blade removal.
The anionic polyacrylic acid-based thickener is a polymer electrolyte compound, is a copolymer with slight crosslinking, and can make printing paste have necessary viscosity and plasticity in water, so that bleeding phenomenon does not occur when the paste is applied to the surface of fabric, and the contour line of the pattern can be maintained even under high pressure. The emulsion can thicken the color paste, promote adhesion, has an emulsification effect, and can improve the coloring amount and the vividness of the pigment printing fabric, so that the fabric obtains patterns with clear outlines, and provides good rheological property, and the adhesive cement or the color paste on a screen printing and a printing roller is transferred to the fabric, so that the dye and the fiber are combined together, and the printing patterns are clear in outlines, clear in patterns, bright and uniform in color; after the dye is fixed, the reaction product and the residues are easy to remove in the downstream process, so that the fabric has soft hand feeling.
In conclusion, the polyacrylic acid thickener has the characteristics of low solid content, dosage saving, no color, easy cleaning, thixotropic viscosity, reduced viscosity when being subjected to external pressure, stress relief, namely recovery to the original viscosity state; when the rotary screen printing is used for scraping, the viscosity is reduced under the pressure of a scraper, the penetration is facilitated, when the scraper leaves, the scraper returns to be viscous, the overflow phenomenon is avoided, the color yield of the printing is higher than that of natural paste, and the printing effect is good.
At present, the preparation method of polyacrylic acid thickening agent in the prior art mainly adopts a chemical initiation method. For example, Chinese patent with publication number CN101619543A discloses an acrylate synthetic thickener and a preparation method thereof; chinese patent with publication number CN101775099A discloses a pigment printing thickener and a preparation method thereof; chinese patent publication No. CN104562774A discloses an acrylic pigment printing thickener; chinese patent publication No. CN1986580A discloses a method for synthesizing a pigment printing thickener by using an inverse emulsion; chinese patent with publication number CN105714579A discloses an environment-friendly soft printing thickener for reactive dyes and a preparation method thereof.
However, the preparation method needs to be carried out in a reaction kettle for heating and maintaining to a certain temperature for carrying out stable reaction, and the process time is long; moreover, the prepared product has low viscosity and unstable performance.
Disclosure of Invention
In view of the above, the present invention provides a polyacrylic acid thickener and a preparation method thereof, the preparation method provided by the present invention can rapidly synthesize the polyacrylic acid thickener at normal temperature, and the prepared product has high viscosity and stable performance.
The invention provides a preparation method of a polyacrylic acid thickening agent, which comprises the following steps:
a) mixing an olefinic acid monomer, an alkali liquor, water, a cross-linking agent, an emulsifying agent and a solvent to obtain a mixed feed liquid; the acrylic monomer comprises one or more of acrylic acid, methacrylic acid, acrylamide, crotonic acid and maleic anhydride;
b) homogenizing and emulsifying the mixed material liquid obtained in the step a) to obtain mixed emulsion;
c) performing electron beam irradiation on the mixed emulsion obtained in the step b) to obtain a homogeneous paste; and concentrating to obtain the polyacrylic acid thickening agent.
Preferably, the mass fraction of the alkali liquor in the step a) is 20-40%.
Preferably, the cross-linking agent in step a) comprises one or more of N, N' -methylenebisacrylamide, allyl sucrose ether, pentaerythritol allyl ether, pentaerythritol acrylate and glycerol acrylate.
Preferably, the mass ratio of the olefinic acid-based monomer, the alkali liquor, the water, the cross-linking agent, the emulsifier and the solvent in the step a) is (100-200): (10-500): (10-1000): (0.01-1.5): (1-50): (10-2000).
Preferably, the mixing process in step a) is specifically:
a1) neutralizing an olefinic acid monomer, alkali liquor and water in a mixing tank to obtain a neutralized liquid; the neutralization degree of the neutralization is controlled to be more than 60 percent;
a2) mixing the neutralized liquid obtained in the step a1) with a cross-linking agent, an emulsifier and a solvent to obtain a mixed liquid.
Preferably, the stirring speed of the homogeneous emulsification in the step b) is 3000 rpm-20000 rpm, and the time is 2 min-40 min.
Preferably, the process of electron beam irradiation in step c) is specifically:
controlling the thickness of the obtained mixed emulsion to be 1-5 cm, and carrying out electron beam irradiation to obtain the homogeneous paste.
Preferably, the dose of the electron beam irradiation in the step c) is 0.2kGy to 50 kGy.
Preferably, the concentration treatment in the step c) is carried out at a temperature of 60-110 ℃ for 2-30 min.
The invention also provides a polyacrylic acid thickener prepared by the preparation method of the technical scheme.
The invention provides a preparation method of a polyacrylic acid thickening agent, which comprises the following steps: a) mixing an olefinic acid monomer, an alkali liquor, water, a cross-linking agent, an emulsifying agent and a solvent to obtain a mixed feed liquid; the acrylic monomer comprises one or more of acrylic acid, methacrylic acid, acrylamide, crotonic acid and maleic anhydride; b) homogenizing and emulsifying the mixed material liquid obtained in the step a) to obtain mixed emulsion; c) performing electron beam irradiation on the mixed emulsion obtained in the step b) to obtain a homogeneous paste; and concentrating to obtain the polyacrylic acid thickening agent. Compared with the prior art, the preparation method provided by the invention adopts the specific composition of mixed feed liquid, and carries out electron beam irradiation after homogenizing and emulsifying, so as to prepare the polyacrylic acid thickening agent; the preparation method does not need nitrogen gas for oxygen removal and initiator addition, can quickly synthesize the polyacrylic acid thickening agent at normal temperature, and the prepared product has high viscosity and stable performance. Experimental results show that the 1% viscosity of the polyacrylic acid thickener obtained by the preparation method provided by the invention is more than 3300mPa & s, and can reach 3800mPa & s.
In addition, the preparation method provided by the invention has the advantages of simple process, easiness in control, mild conditions, good finished product quality, high yield and wide application prospect.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a preparation method of a polyacrylic acid thickening agent, which comprises the following steps:
a) mixing an olefinic acid monomer, an alkali liquor, water, a cross-linking agent, an emulsifying agent and a solvent to obtain a mixed feed liquid; the acrylic monomer comprises one or more of acrylic acid, methacrylic acid, acrylamide, crotonic acid and maleic anhydride;
b) homogenizing and emulsifying the mixed material liquid obtained in the step a) to obtain mixed emulsion;
c) performing electron beam irradiation on the mixed emulsion obtained in the step b) to obtain a homogeneous paste; and concentrating to obtain the polyacrylic acid thickening agent.
The invention firstly mixes the olefine acid monomer, alkali liquor, water, cross-linking agent, emulsifier and solvent to obtain mixed feed liquid. In the present invention, the ethylenic monomer includes one or more of acrylic acid, methacrylic acid, acrylamide, crotonic acid, and butenoic anhydride, more preferably acrylic acid and/or methacrylic acid, and more preferably acrylic acid. The source of the ethylenic monomer is not particularly limited in the present invention, and commercially available ethylenic monomers having a double bond, which are known to those skilled in the art, may be used.
In the present invention, the alkali solution preferably includes one or more of a sodium hydroxide solution, a potassium hydroxide solution, ammonia water, a carbonate solution, and a bicarbonate solution, and more preferably a sodium hydroxide solution. The source of the alkali solution is not particularly limited in the present invention, and commercially available products or self-products known to those skilled in the art may be used. In the invention, the mass fraction of the alkali liquor is preferably 20-40%, and more preferably 30%. In a preferred embodiment of the present invention, the alkali solution is a 30% sodium hydroxide solution by mass fraction.
In the present invention, the crosslinking agent preferably includes one or more of N, N ' -methylenebisacrylamide, allyl sucrose ether, pentaerythritol allyl ether, pentaerythritol acrylate, and glycerol acrylate, more preferably one or more of N, N ' -methylenebisacrylamide, allyl sucrose ether, and pentaerythritol acrylate, and more preferably N, N ' -methylenebisacrylamide, allyl sucrose ether, or pentaerythritol acrylate. The source of the crosslinking agent is not particularly limited in the present invention, and the above-mentioned commercially available monomers having two or more double bonds, which are well known to those skilled in the art, can be used.
In the invention, the emulsifier preferably comprises a hydrophobic emulsifier (such as one or more of span 20, span 60 and span 80) with an HLB value of 3-6 or a hydrophilic emulsifier (such as one or more of Tween 20, Tween 60 and Tween 80) with an HLB value of more than 10, and more preferably a hydrophobic emulsifier with an HLB value of 3-6. The source of the emulsifier is not particularly limited in the present invention, and commercially available products well known to those skilled in the art may be used. In a preferred embodiment of the present invention, the emulsifier is span 80.
In the present invention, the solvent preferably includes one or more of kerosene, diesel oil, white oil, gasoline and special solvent oil, and more preferably one or more of kerosene, white oil and gasoline. The source of the solvent is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used.
In the invention, the mass ratio of the olefinic monomer, the alkali liquor, the water, the cross-linking agent, the emulsifier and the solvent is preferably (100-200): (10-500): (10-1000): (0.01-1.5): (1-50): (10 to 2000), more preferably 200: (280-320): (250-300): (0.15-0.25): (20-25): (350-450).
In the present invention, the mixing process preferably includes:
a1) neutralizing an olefinic acid monomer, alkali liquor and water in a mixing tank to obtain a neutralized liquid;
a2) mixing the neutralized liquid obtained in the step a1) with a cross-linking agent, an emulsifier and a solvent to obtain a mixed liquid.
In the present invention, the neutralization degree is preferably controlled to 60% or more, more preferably 70% or more.
After the mixed material liquid is obtained, the obtained mixed material liquid is homogenized and emulsified to obtain mixed emulsion. The homogenizing and emulsifying device is not particularly limited, and a high-efficiency homogenizer well known to those skilled in the art is adopted; in a preferred embodiment of the present invention, the emulsifying homogenizer is an ER2000 type emulsifying homogenizer available from shanghai chiken mechanical equipment ltd. In the present invention, the stirring speed of the homogeneous emulsification is preferably 3000rpm to 20000rpm, more preferably 5000rpm to 20000 rpm; the time for homogenizing and emulsifying is preferably 2min to 40min, and more preferably 30 min.
After the mixed emulsion is obtained, the electron beam irradiation is carried out on the obtained mixed emulsion to obtain a homogeneous paste; and concentrating to obtain the polyacrylic acid thickening agent. The electron beam irradiation equipment is not particularly limited in the present invention, and high-energy electron accelerators well known to those skilled in the art, including 2Me, 3Me, 5Me, 10Me, etc., are used. In a preferred embodiment of the present invention, the electron beam irradiation equipment is a 10Me electron accelerator.
In the present invention, the process of electron beam irradiation is preferably specifically:
controlling the thickness of the obtained mixed emulsion to be 1-4 cm, and performing electron beam irradiation to obtain a homogeneous paste;
more preferably:
controlling the thickness of the obtained mixed emulsion to be 2-3 cm, and carrying out electron beam irradiation to obtain the homogeneous paste. The invention controls the thickness of the mixed emulsion within the range, and is beneficial to improving the quality and the yield of finished products.
In the present invention, the dose of the electron beam irradiation is preferably 0.2kGy to 50kGy, more preferably 10kGy to 15 kGy. The invention has no special limit on the times of electron beam irradiation, and can adopt one time or more times, so as to ensure that the total dose of electron beam irradiation meets the requirements.
The preparation method provided by the invention adopts the mixed feed liquid with specific composition to carry out homogenizing emulsification, and a nitrogen oxygen-expelling process is not needed; and then electron beam irradiation is carried out, so that an initiator is not needed to carry out initiation reaction on the materials, and the electron beam irradiation can rapidly and well complete the initiation reaction at normal temperature to obtain a product with high viscosity and stable performance.
After the electron beam irradiation is completed, the present invention preferably further includes:
and (4) carrying out heat preservation treatment on the material subjected to electron beam irradiation to obtain the homogeneous paste. In the invention, the temperature of the heat preservation treatment is preferably 30-40 ℃, and the time is preferably 2-30 min. The invention adopts the heat preservation treatment, can further improve the property stability of the material after the electron beam irradiation, and is beneficial to improving the performance stability of the final product.
After the homogeneous paste is obtained, the invention carries out concentration treatment on the obtained homogeneous paste to obtain the polyacrylic acid thickening agent. The apparatus for the concentration treatment of the present invention is not particularly limited, and a concentration tank well known to those skilled in the art is used. In the invention, the temperature of the concentration treatment is preferably 60-110 ℃, and more preferably 80-90 ℃; the time for the concentration treatment is preferably 2 to 30min, more preferably 18 to 30 min.
In the present invention, the concentration requirement is determined by the specified concentration of the final product, and the concentration process is completed when the specified concentration of the final product is reached, which is not particularly limited in the present invention.
The preparation method provided by the invention has the advantages of simple process, easiness in control, mild conditions, good finished product quality, high yield and wide application prospect.
The invention also provides a polyacrylic acid thickener prepared by the preparation method of the technical scheme. The preparation method provided by the invention adopts the specific composition of mixed feed liquid, and carries out electron beam irradiation after homogenizing and emulsifying to prepare the polyacrylic acid thickening agent; the preparation method does not need nitrogen gas for oxygen removal and initiator addition, can quickly synthesize the polyacrylic acid thickening agent at normal temperature, and the prepared product has high viscosity and stable performance. Experimental results show that the 1% viscosity of the polyacrylic acid thickener obtained by the preparation method provided by the invention is more than 3300mPa & s, and can reach 3800mPa & s.
The invention provides a preparation method of a polyacrylic acid thickening agent, which comprises the following steps: a) mixing an olefinic acid monomer, an alkali liquor, water, a cross-linking agent, an emulsifying agent and a solvent to obtain a mixed feed liquid; the acrylic monomer comprises one or more of acrylic acid, methacrylic acid, acrylamide, crotonic acid and maleic anhydride; b) homogenizing and emulsifying the mixed material liquid obtained in the step a) to obtain mixed emulsion; c) performing electron beam irradiation on the mixed emulsion obtained in the step b) to obtain a homogeneous paste; and concentrating to obtain the polyacrylic acid thickening agent. Compared with the prior art, the preparation method provided by the invention adopts the specific composition of mixed feed liquid, and carries out electron beam irradiation after homogenizing and emulsifying, so as to prepare the polyacrylic acid thickening agent; the preparation method does not need nitrogen gas for oxygen removal and initiator addition, can quickly synthesize the polyacrylic acid thickening agent at normal temperature, and the prepared product has high viscosity and stable performance. Experimental results show that the 1% viscosity of the polyacrylic acid thickener obtained by the preparation method provided by the invention is more than 3300mPa & s, and can reach 3800mPa & s.
In addition, the preparation method provided by the invention has the advantages of simple process, easiness in control, mild conditions, good finished product quality, high yield and wide application prospect.
In order to further illustrate the present invention, the following detailed description of the technical solutions provided by the present invention is provided with reference to examples. The starting materials used in the following examples of the present invention are all commercially available products.
Example 1
(1) Neutralizing 200 parts by weight of acrylic acid monomer, 300 parts by weight of 30% sodium hydroxide solution and 250 parts by weight of water in a batching tank, and controlling the neutralization degree to be more than 70% to obtain a neutralized liquid; then, 0.15 part by weight of allyl sucrose ether monomer, 350 parts by weight of kerosene and 20 parts by weight of span 80 were added and mixed to obtain a mixed feed liquid.
(2) And (2) homogenizing and emulsifying the mixed material liquid obtained in the step (1) for 30min by a high-efficiency homogenizer at a stirring speed of 8000rpm to obtain a mixed emulsion.
(3) Controlling the thickness of the mixed emulsion obtained in the step (2) to be 2-3 cm, and performing electron beam irradiation to 12kGy to obtain a homogeneous paste; and concentrating at 85 deg.C for 25min to obtain polyacrylic acid thickener.
Through detection (the detection method specifically comprises the step of measuring the concentration of 1% of a dry base material by adopting an NDJ-79 type rotational viscometer), the viscosity of 1% of the thickening agent provided by the embodiment 1 is 3300mPa & s.
Example 2
(1) Neutralizing 200 parts by weight of acrylic acid monomer, 320 parts by weight of 30% sodium hydroxide solution and 260 parts by weight of water in a batching tank, and controlling the neutralization degree to be more than 70% to obtain a neutralized liquid; then 0.18 weight part of pentaerythritol trienyl acrylate monomer, 300 weight parts of kerosene, 60 weight parts of white oil and 25 weight parts of span 80 are added and mixed to obtain mixed feed liquid.
(2) And (2) homogenizing and emulsifying the mixed material liquid obtained in the step (1) for 30min at the stirring speed of 10000rpm by using a high-efficiency homogenizer to obtain a mixed emulsion.
(3) Controlling the thickness of the mixed emulsion obtained in the step (2) to be 2-3 cm, and performing electron beam irradiation for 15kGy to obtain a homogeneous paste; and concentrating at 85 deg.C for 20min to obtain polyacrylic acid thickener.
Through detection, the 1% viscosity of the thickener provided by the embodiment 2 of the invention is 3500 mPas.
Example 3
(1) Neutralizing 200 parts by weight of acrylic acid monomer, 280 parts by weight of 30% sodium hydroxide solution and 300 parts by weight of water in a batching tank, and controlling the neutralization degree to be more than 70% to obtain a neutralized liquid; then 0.25 weight part of N, N' -methylene bisacrylamide monomer, 350 weight parts of kerosene, 100 weight parts of gasoline and 25 weight parts of span 80 are added and mixed to obtain mixed feed liquid.
(2) And (2) homogenizing and emulsifying the mixed material liquid obtained in the step (1) for 30min by a high-efficiency homogenizer at a stirring speed of 11000rpm to obtain a mixed emulsion.
(3) Controlling the thickness of the mixed emulsion obtained in the step (2) to be 2-3 cm, and performing electron beam irradiation to 10kGy to obtain a homogeneous paste; and concentrating at 85 deg.C for 30min to obtain polyacrylic acid thickener.
Through detection, the 1% viscosity of the thickening agent provided by the embodiment 3 of the invention is 3800mPa & s.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A preparation method of a polyacrylic acid thickener comprises the following steps:
a) mixing an olefinic acid monomer, an alkali liquor, water, a cross-linking agent, an emulsifying agent and a solvent to obtain a mixed feed liquid; the acrylic monomer comprises one or more of acrylic acid, methacrylic acid, acrylamide, crotonic acid and maleic anhydride; the mass ratio of the acrylic acid monomer to the alkali liquor to the water to the cross-linking agent to the emulsifier to the solvent is 200: (280-320): (250-300): (0.15-0.25): (20-25): (350-450);
b) homogenizing and emulsifying the mixed material liquid obtained in the step a) to obtain mixed emulsion;
c) performing electron beam irradiation on the mixed emulsion obtained in the step b) to obtain a homogeneous paste; concentrating to obtain polyacrylic acid thickening agent;
the electron beam irradiation process specifically comprises the following steps:
controlling the thickness of the obtained mixed emulsion to be 1-5 cm, and performing electron beam irradiation to obtain a homogeneous paste; the dose of the electron beam irradiation is 10 kGy-15 kGy.
2. The preparation method according to claim 1, characterized in that the mass fraction of the lye in step a) is between 20% and 40%.
3. The method of claim 1, wherein the cross-linking agent in step a) comprises one or more of N, N' -methylenebisacrylamide, allyl sucrose ether, pentaerythritol allyl ether, pentaerythritol acrylate, and glycerol acrylate.
4. The preparation method according to claim 1, wherein the mixing in step a) is specifically performed by:
a1) neutralizing an olefinic acid monomer, alkali liquor and water in a mixing tank to obtain a neutralized liquid; the neutralization degree of the neutralization is controlled to be more than 60 percent;
a2) mixing the neutralized liquid obtained in the step a1) with a cross-linking agent, an emulsifier and a solvent to obtain a mixed liquid.
5. The method according to claim 1, wherein the stirring speed of the homogeneous emulsification in the step b) is 3000rpm to 20000rpm, and the time is 2min to 40 min.
6. The method according to claim 1, wherein the concentration in step c) is carried out at a temperature of 60 to 110 ℃ for 2 to 30 minutes.
7. A polyacrylic acid thickener produced by the production method according to any one of claims 1 to 6.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307068A (en) * | 2000-01-28 | 2001-08-08 | 中山市瑞迪新材料有限公司 | Method for preparing thickener by chemical and radiation initiation |
| CN101921349A (en) * | 2010-07-27 | 2010-12-22 | 合肥聚合辐化技术有限公司 | Radiation polymerization method of continuous hydrous dispersoids of unsaturated monomer |
| WO2011114908A1 (en) * | 2010-03-15 | 2011-09-22 | Ｍｔアクアポリマー株式会社 | Nonionic thickening agent for papermaking and method for producing same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307068A (en) * | 2000-01-28 | 2001-08-08 | 中山市瑞迪新材料有限公司 | Method for preparing thickener by chemical and radiation initiation |
| WO2011114908A1 (en) * | 2010-03-15 | 2011-09-22 | Ｍｔアクアポリマー株式会社 | Nonionic thickening agent for papermaking and method for producing same |
| CN101921349A (en) * | 2010-07-27 | 2010-12-22 | 合肥聚合辐化技术有限公司 | Radiation polymerization method of continuous hydrous dispersoids of unsaturated monomer |
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