CN112552468A - Super absorbent resin and preparation method thereof - Google Patents
Super absorbent resin and preparation method thereof Download PDFInfo
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- CN112552468A CN112552468A CN202011457271.1A CN202011457271A CN112552468A CN 112552468 A CN112552468 A CN 112552468A CN 202011457271 A CN202011457271 A CN 202011457271A CN 112552468 A CN112552468 A CN 112552468A
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- C08F285/00—Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers
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- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
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Abstract
The invention belongs to the technical field of high-molecular chemical additives, and discloses a super absorbent resin and a preparation method thereof. The preparation method comprises the following steps: weighing raw materials, wherein the raw materials comprise the following components in parts by weight: interpenetrating polymer: 1-5 parts, acrylic acid: 200-300 parts of sodium hydroxide solution with the mass percentage of 50 percent: 150-300 parts of deionized water: 500-800 parts of pre-crosslinking agent: 0.5-3 parts of initiator: 0.1-2 parts of surface cross-linking liquid: 10-20 parts; dissolving the interpenetrating polymer in deionized water, adding acrylic acid, and neutralizing until the pH value is 6-7; cooling to 23 +/-2 ℃; isolating oxygen, adding a cross-linking agent and an initiator to initiate polymerization, naturally heating to a constant temperature, then preserving the temperature at 80-90 ℃ for 2 hours to obtain resin colloid, and granulating, drying, crushing and screening the resin colloid to obtain resin particles; adding the surface cross-linking liquid to the surface of the resin particles; cooling and screening to obtain the super absorbent resin; the super absorbent resin contains a semi-network interpenetrating structure. The super absorbent resin has excellent water absorption performance.
Description
Technical Field
The invention relates to the technical field of high-molecular chemical additives, in particular to a super absorbent resin and a preparation method thereof.
Background
The description of the background of the invention pertaining to the related art to which this invention pertains is given for the purpose of illustration and understanding only of the summary of the invention and is not to be construed as an admission that the applicant is explicitly or implicitly admitted to be prior art to the date of filing this application as first filed with this invention.
The super absorbent resin is a novel functional polymer material, contains strong hydrophilic groups, has a three-dimensional network structure through moderate crosslinking, and can quickly absorb water with the mass which is dozens of times or even thousands of times of the self mass through hydration to form gel.
The super absorbent resin is widely applied to the field of sanitary products such as paper diapers, sanitary towels and the like. Water-absorbent resins used in sanitary materials are required to have excellent water absorption properties such as water absorption and retention, absorption capacity under pressure, absorption rate, and water permeability through gel (liquid permeability). The water absorption performance of the existing super absorbent resin has a great improvement space.
It is well known that SAPs are capable of absorbing large amounts of water by the following mechanism: hydrophilic groups on the molecular chain of the super absorbent resin form stable hydrogen bond combination with water molecules, and then the hydrophilic groups are ionized, and hydrophilic groups with charges repel each other due to ionization to cause the expansion of a network structure.
Disclosure of Invention
The embodiment of the invention aims to provide the super absorbent resin and the preparation method thereof.
The purpose of the embodiment of the invention is realized by the following technical scheme:
on one hand, the invention provides a preparation method of super absorbent resin, which comprises the following steps:
weighing raw materials, wherein the raw materials comprise the following components in parts by weight: interpenetrating polymer: 1-5 parts, acrylic acid: 200-300 parts of sodium hydroxide solution with the mass percentage of 50 percent: 150-300 parts of deionized water: 500-800 parts of pre-crosslinking agent: 0.5-3 parts of initiator: 0.1-2 parts of surface cross-linking liquid: 10-20 parts.
Dissolving the interpenetrating polymer in deionized water, adding acrylic acid, uniformly mixing, and neutralizing by using a sodium hydroxide solution until the pH value is 6-7;
cooling the neutralized acrylic acid solution to 23 +/-2 ℃; isolating oxygen, adding a cross-linking agent and an initiator into the acrylic acid solution to initiate polymerization, naturally heating to a constant temperature, then preserving the temperature at 80-90 ℃ for 2 hours to obtain resin colloid, and granulating, drying, crushing and screening the resin colloid to obtain 30-80-mesh resin particles;
mixing the surface cross-linking liquid, adding the mixture to the surface of the resin particles, and fully and uniformly stirring, wherein the surface cross-linking temperature is 120-200 ℃, and the heat preservation time is 10-60 min;
cooling to room temperature after heat preservation and screening to obtain super absorbent resin particles; the super absorbent resin particles contain a semi-network interpenetrating structure.
Further, the interpenetrating polymer is prepared by the following method:
weighing the following components in parts by weight: polyvinyl alcohol: 50 parts of 2-acrylamide-2-methylpropanesulfonic acid: 50 parts, acrylamide: 150 parts, deionized water: 600 parts, potassium persulfate: 1 part, sodium bisulfite: 0.4 part;
fully dissolving polyvinyl alcohol, 2-acrylamide-2-methylpropanesulfonic acid and acrylamide in deionized water to obtain a mixed solution; introducing nitrogen into the mixed solution for 30min to remove oxygen, and adding potassium persulfate and sodium bisulfite at normal temperature to initiate reaction; keeping the temperature for 5 hours after the temperature is raised to the final temperature, wherein the final temperature is 80-85 ℃; granulating, drying, crushing and screening to obtain 25-100 mesh particles to obtain the interpenetrating polymer.
Further, the pre-crosslinking agent is one or a plurality of N, N-methylene diacrylamide, N-hydroxymethyl acrylamide, polyethylene glycol 600 acrylate, trimethylolpropane tripropionate and pentaerythritol triacrylate.
Further, the surface cross-linking liquid is one or more of polyols, polyamine compounds and epoxy compounds.
Further, the polyhydric alcohols include ethylene glycol, butylene glycol, glycerol, triethylene glycol and the like; the polyamine compound comprises: ethylenediamine, diethylenediamine, and triethylenediamine; the epoxy compounds include butanediol diglycidyl ether, polyglycerol polyglycidyl ether, and sorbitol polyglycidyl ether.
Further, the initiator is sodium persulfate and sodium bisulfite.
Furthermore, the method of introducing nitrogen and discharging oxygen is adopted for isolating oxygen, the nitrogen introducing time is 10-20min, the initiation temperature is controlled to be 23 +/-2 ℃, and the peak value of natural temperature rise is 85-90 ℃.
Further, the surface crosslinking temperature is 120-150 ℃, and the heat preservation time is 40-60 min.
In another aspect, the invention provides a super absorbent resin, wherein the super absorbent resin contains a network interpenetrating structure.
Further, the super absorbent resin is prepared by the preparation method.
The embodiment of the invention has the following beneficial effects:
the super absorbent resin of the invention increases the ionization degree of SAP and the ionic charge density of a network structure by introducing a large amount of hydrophilic groups through interpenetrating polymers, and improves the salt resistance of the super absorbent resin, thereby greatly improving the water absorption and retention performance of the super absorbent resin in saline water; meanwhile, the semi-interpenetrating structure can form surface folds and holes on the surface of the particles, so that the absorption speed of the super absorbent resin is improved.
Detailed Description
The present application is further described below with reference to examples.
In the following description, different "one embodiment" or "an embodiment" may not necessarily refer to the same embodiment, in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art. Various embodiments may be replaced or combined, and other embodiments may be obtained according to the embodiments without creative efforts for those skilled in the art.
A preparation method of super absorbent resin comprises the following steps:
weighing raw materials, wherein the raw materials comprise the following components in parts by weight: interpenetrating polymer: 1-5 parts, acrylic acid: 200-300 parts of sodium hydroxide solution with the mass percentage of 50 percent: 150-300 parts of deionized water: 500-800 parts of pre-crosslinking agent: 0.5-3 parts of initiator (redox agent): 0.1-2 parts of surface cross-linking liquid: 10-20 parts.
Dissolving the interpenetrating polymer in deionized water, adding acrylic acid, uniformly mixing, and neutralizing by using a sodium hydroxide solution until the pH value is 6-7;
cooling the neutralized acrylic acid solution to 23 +/-2 ℃; isolating oxygen, adding a cross-linking agent and an initiator into the acrylic acid solution to initiate polymerization, naturally heating to a constant temperature, then preserving the temperature at 80-90 ℃ for 2 hours to obtain resin colloid, and granulating, drying, crushing and screening the resin colloid to obtain 30-80-mesh resin particles;
mixing the surface cross-linking liquid, adding the mixture to the surface of the resin particles, and fully and uniformly stirring, wherein the surface cross-linking temperature is 120-200 ℃, and the heat preservation time is 10-60 min;
cooling to room temperature after heat preservation and screening to obtain super absorbent resin particles; the super absorbent resin particles contain a semi-network interpenetrating structure.
In some embodiments of the invention, the interpenetrating polymer is prepared by:
weighing the following components in parts by weight: polyvinyl alcohol: 50 parts of 2-acrylamide-2-methylpropanesulfonic acid: 50 parts, acrylamide: 150 parts, deionized water: 600 parts, potassium persulfate: 1 part, sodium bisulfite: 0.4 part;
fully dissolving polyvinyl alcohol, 2-acrylamide-2-methylpropanesulfonic acid and acrylamide in deionized water to obtain a mixed solution; introducing nitrogen into the mixed solution for 30min to remove oxygen, and adding potassium persulfate and sodium bisulfite at normal temperature to initiate reaction; keeping the temperature for 5 hours after the temperature is raised to the final temperature, wherein the final temperature is 80-85 ℃; granulating, drying, crushing and screening to obtain 25-100 mesh particles to obtain the interpenetrating polymer.
In some embodiments of the present invention, the pre-crosslinking agent is one or more of N, N-methylene bisacrylamide, N-methylol acrylamide, polyethylene glycol 600 acrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate.
In some embodiments of the present invention, the surface cross-linking liquid is one or more of a polyol, a polyamine compound, and an epoxy compound.
In some embodiments of the present invention, the polyhydric alcohols include ethylene glycol, butylene glycol, glycerol, triethylene glycol, and the like; the polyamine compound comprises: ethylenediamine, diethylenediamine, and triethylenediamine; the epoxy compounds include butanediol diglycidyl ether, polyglycerol polyglycidyl ether, and sorbitol polyglycidyl ether.
In some embodiments of the invention, the initiator is sodium persulfate or sodium bisulfite.
In some embodiments of the invention, the oxygen isolation adopts a mode of introducing nitrogen and discharging oxygen, the nitrogen introducing time is 10-20min, the initiation temperature is controlled at 23 +/-2 ℃, and the peak value of natural temperature rise is 85-90 ℃.
In some embodiments of the present invention, the surface crosslinking temperature is 120-.
In some embodiments of the invention, the interpenetrating polymer should be added slowly under stirring for not less than 30 min;
in some embodiments of the invention, the drying temperature is 120 ℃.
In another aspect, the invention provides a super absorbent resin, wherein the super absorbent resin contains a network interpenetrating structure.
In some embodiments of the present invention, the super absorbent resin is prepared by the above-mentioned preparation method.
The first embodiment is as follows:
the weight parts of the raw materials are as follows:
the specific preparation process is as follows:
(1) dissolving the interpenetrating polymer in deionized water, adding acrylic acid, uniformly mixing, and neutralizing with sodium hydroxide to obtain a solution with a pH value of 6-7;
(2) introducing nitrogen to remove oxygen, adding a cross-linking agent and an initiator to initiate polymerization, and naturally heating;
(3) ending the reaction without temperature rise, then preserving heat for 2 hours at 80-90 ℃, and granulating, drying, crushing and screening the resin colloid to obtain 30-80 mesh resin particles;
(4) mixing the surface cross-linking liquid, adding the mixture to the surface of the resin particles, fully and uniformly stirring the mixture, and preserving the heat for 30min at 140 ℃.
(5) Cooling to room temperature after heat preservation and screening to obtain the super absorbent resin particles with super high gel strength.
Example two:
the weight parts of the raw materials are as follows:
the specific preparation process is as follows:
(1) dissolving the interpenetrating polymer in deionized water, adding acrylic acid, uniformly mixing, and neutralizing with sodium hydroxide to obtain a solution with a pH value of 6-7;
(2) introducing nitrogen to remove oxygen, adding a cross-linking agent and an initiator to initiate polymerization, and naturally heating;
(3) ending the reaction without temperature rise, then preserving heat for 2 hours at 80-90 ℃, and granulating, drying, crushing and screening the resin colloid to obtain 30-80 mesh resin particles;
(4) mixing the surface cross-linking liquid, adding the mixture to the surface of the resin particles, fully and uniformly stirring the mixture, and preserving the heat for 30min at 140 ℃;
(5) cooling to room temperature after heat preservation and screening to obtain the super absorbent resin particles with super high gel strength.
Example three:
the weight parts of the raw materials are as follows:
the specific preparation process is as follows:
(1) dissolving the interpenetrating polymer in deionized water, adding acrylic acid, uniformly mixing, and neutralizing with sodium hydroxide to obtain a solution with a pH value of 6-7;
(2) introducing nitrogen to remove oxygen, adding a cross-linking agent and an initiator to initiate polymerization, and naturally heating;
(3) ending the reaction without temperature rise, then preserving heat for 2 hours at 80-90 ℃, and granulating, drying, crushing and screening the resin colloid to obtain 30-80 mesh resin particles;
(4) mixing the surface cross-linking liquid, adding the mixture to the surface of the resin particles, fully and uniformly stirring the mixture, and preserving the heat for 30min at 140 ℃;
(5) cooling to room temperature after heat preservation and screening to obtain the super absorbent resin particles with super high gel strength.
Example four:
the weight parts of the raw materials are as follows:
the specific preparation process is as follows:
(1) dissolving the interpenetrating polymer in deionized water, adding acrylic acid, uniformly mixing, and neutralizing with sodium hydroxide to obtain a solution with a pH value of 6-7;
(2) introducing nitrogen to remove oxygen, adding a cross-linking agent and an initiator to initiate polymerization, and naturally heating;
(3) ending the reaction without temperature rise, then preserving heat for 2 hours at 80-90 ℃, and granulating, drying, crushing and screening the resin colloid to obtain 30-80 mesh resin particles;
(4) mixing the surface cross-linking liquid, adding the mixture to the surface of the resin particles, fully and uniformly stirring the mixture, and preserving the heat for 30min at 140 ℃;
(5) cooling to room temperature after heat preservation and screening to obtain the super absorbent resin particles with super high gel strength.
Comparative example one:
the weight parts of the raw materials are as follows:
the specific preparation process is as follows:
(1) dissolving the interpenetrating polymer in deionized water, adding acrylic acid, uniformly mixing, and neutralizing with sodium hydroxide to obtain a solution with a pH value of 6-7;
(2) introducing nitrogen to remove oxygen, adding a cross-linking agent and an initiator to initiate polymerization, and naturally heating;
(3) ending the reaction without temperature rise, then preserving heat for 2 hours at 80-90 ℃, and granulating, drying, crushing and screening the resin colloid to obtain 30-80 mesh resin particles;
(4) mixing the surface cross-linking liquid, adding the mixture to the surface of the resin particles, fully and uniformly stirring the mixture, and preserving the heat for 30min at 140 ℃;
(5) cooling to room temperature after heat preservation and screening to obtain the super absorbent resin particles with super high gel strength.
Comparative example No. two
The weight parts of the raw materials are as follows:
the specific preparation process is as follows:
(1) dissolving the interpenetrating polymer in deionized water, adding acrylic acid, uniformly mixing, and neutralizing with sodium hydroxide to obtain a solution with a pH value of 6-7;
(2) introducing nitrogen to remove oxygen, adding a cross-linking agent and an initiator to initiate polymerization, and naturally heating;
(3) ending the reaction without temperature rise, then preserving heat for 2 hours at 80-90 ℃, and granulating, drying, crushing and screening the resin colloid to obtain 30-80 mesh resin particles;
(4) mixing the surface cross-linking liquid, adding the mixture to the surface of the resin particles, fully and uniformly stirring the mixture, and preserving the heat for 30min at 140 ℃;
(5) cooling to room temperature after heat preservation and screening to obtain the super absorbent resin particles with super high gel strength.
Comparative example three:
the weight parts of the raw materials are as follows:
the specific preparation process is as follows:
(1) dissolving the interpenetrating polymer in deionized water, adding acrylic acid, uniformly mixing, and neutralizing with sodium hydroxide to obtain a solution with a pH value of 6-7;
(2) introducing nitrogen to remove oxygen, adding a cross-linking agent and an initiator to initiate polymerization, and naturally heating;
(3) ending the reaction without temperature rise, then preserving heat for 2 hours at 80-90 ℃, and granulating, drying, crushing and screening the resin colloid to obtain 30-80 mesh resin particles;
(4) mixing the surface cross-linking liquid, adding the mixture to the surface of the resin particles, fully and uniformly stirring the mixture, and preserving the heat for 30min at 140 ℃;
(5) cooling to room temperature after heat preservation and screening to obtain the super absorbent resin particles with super high gel strength.
Comparative example four:
the weight parts of the raw materials are as follows:
the specific preparation process is as follows:
(1) dissolving the interpenetrating polymer in deionized water, adding acrylic acid, uniformly mixing, and neutralizing with sodium hydroxide to obtain a solution with a pH value of 6-7;
(2) introducing nitrogen to remove oxygen, adding a cross-linking agent and an initiator to initiate polymerization, and naturally heating;
(3) ending the reaction without temperature rise, then preserving heat for 2 hours at 80-90 ℃, and granulating, drying, crushing and screening the resin colloid to obtain 30-80 mesh resin particles;
(4) mixing the surface cross-linking liquid, adding the mixture to the surface of the resin particles, fully and uniformly stirring the mixture, and preserving the heat for 30min at 140 ℃;
(5) cooling to room temperature after heat preservation and screening to obtain the super absorbent resin particles with super high gel strength.
The water absorption capacity, water retention and absorption rate of the products of examples 1 to 4 and comparative examples 1 to 4 were compared (data were each measured under 0.9% saline). The method for measuring the water absorption rate and the water retention rate comprises the following steps: (1) accurately weighing 0.2000g of sample, introducing the sample into a tea bag, sealing the tea bag, and soaking the tea bag in sufficient physiological saline; (2) after 30 minutes, the tea bag is lifted out, hung obliquely by a clamp, dripped in water for 10 minutes in a static state, weighed, and blank value measurement is carried out while using the tea bag without a sample as a reference; (3) placing the tea bag into a centrifuge for centrifugal dehydration with a centrifugal force of 250g, and weighing the tea bag after the dehydration is finished after 3 minutes of centrifugation; (4) four groups of data are tested in parallel for each sample, the water absorption multiplying power and the water retention multiplying power are respectively calculated, and the average value is taken as a measurement result. The absorption rate was measured as follows: (1) 50.0 +/-0.5 g of normal saline is filled into a 100mL beaker with a rotor; (2) adjusting a magnetic stirrer to stir at a speed of 600rpm, accurately weighing 2.00g of a sample, putting the sample into a vortex, starting timing by using a stopwatch, and recording time (seconds) when the vortex disappears and the liquid level becomes a horizontal state as an end point; (3) each sample was tested in parallel for 3 sets of data and the average was taken as the assay result. The comparative results are shown in Table 1.
TABLE 1
The interpenetrating polymer is formed by copolymerizing acrylamide, 2-acrylamide-2-methylpropanesulfonic acid and polyvinyl alcohol, and after the interpenetrating polymer is interpenetrated with the super absorbent resin, a large number of hydrophilic groups such as hydroxyl, sulfonic group, amide group and the like can be introduced, so that the ionization degree of SAP (super absorbent polymer) and the ionic charge density of a network structure can be improved, the salt resistance of the super absorbent resin is improved, and the water absorption and retention performance of the super absorbent resin in saline water is greatly improved; meanwhile, the semi-interpenetrating structure can form surface folds and holes on the surface of the particles, so that the absorption speed of the super absorbent resin is improved.
It should be noted that the above embodiments can be freely combined as necessary. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A preparation method of super absorbent resin is characterized by comprising the following steps:
weighing raw materials, wherein the raw materials comprise the following components in parts by weight: interpenetrating polymer: 1-5 parts, acrylic acid: 200-300 parts of sodium hydroxide solution with the mass percentage of 50 percent: 150-300 parts of deionized water: 500-800 parts of pre-crosslinking agent: 0.5-3 parts of initiator: 0.1-2 parts of surface cross-linking liquid: 10-20 parts;
dissolving the interpenetrating polymer in deionized water, adding acrylic acid, uniformly mixing, and neutralizing by using a sodium hydroxide solution until the pH value is 6-7;
cooling the neutralized acrylic acid solution to 23 +/-2 ℃; isolating oxygen, adding a cross-linking agent and an initiator into the acrylic acid solution to initiate polymerization, naturally heating to a constant temperature, then preserving the temperature at 80-90 ℃ for 2 hours to obtain resin colloid, and granulating, drying, crushing and screening the resin colloid to obtain 30-80-mesh resin particles;
mixing the surface cross-linking liquid, adding the mixture to the surface of the resin particles, and fully and uniformly stirring, wherein the surface cross-linking temperature is 120-200 ℃, and the heat preservation time is 10-60 min;
cooling to room temperature after heat preservation and screening to obtain super absorbent resin particles; the super absorbent resin particles contain a semi-network interpenetrating structure.
2. The method for preparing the super absorbent resin according to claim 1, wherein the interpenetrating polymer is prepared by the following method:
weighing the following components in parts by weight: polyvinyl alcohol: 50 parts of 2-acrylamide-2-methylpropanesulfonic acid: 50 parts, acrylamide: 150 parts, deionized water: 600 parts, potassium persulfate: 1 part, sodium bisulfite: 0.4 part;
fully dissolving polyvinyl alcohol, 2-acrylamide-2-methylpropanesulfonic acid and acrylamide in deionized water to obtain a mixed solution; introducing nitrogen into the mixed solution for 30min to remove oxygen, and adding potassium persulfate and sodium bisulfite at normal temperature to initiate reaction; keeping the temperature for 5 hours after the temperature is raised to the final temperature, wherein the final temperature is 80-85 ℃; granulating, drying, crushing and screening to obtain 25-100 mesh particles to obtain the interpenetrating polymer.
3. The method for preparing the super absorbent resin as claimed in claim 1, wherein the pre-crosslinking agent is one or more of N, N-methylene bisacrylamide, N-methylolacrylamide, polyethylene glycol 600 acrylate, trimethylolpropane tripropionate, and pentaerythritol triacrylate.
4. The method of claim 1, wherein the surface cross-linking liquid is one or more of a polyol, a polyamine compound, and an epoxy compound.
5. The method for preparing a super absorbent resin as claimed in claim 4, wherein the polyhydric alcohols comprise ethylene glycol, butylene glycol, glycerol, triethylene glycol, etc.; the polyamine compound comprises: ethylenediamine, diethylenediamine, and triethylenediamine; the epoxy compounds include butanediol diglycidyl ether, polyglycerol polyglycidyl ether, and sorbitol polyglycidyl ether.
6. The method for preparing a super absorbent resin according to claim 1, wherein the initiator is sodium persulfate or sodium bisulfite.
7. The method for preparing the super absorbent resin as claimed in claim 1, wherein the method for isolating oxygen is to introduce nitrogen and discharge oxygen, the nitrogen introduction time is 10-20min, the initiation temperature is controlled at 23 ± 2 ℃, and the peak value of natural temperature rise is 85-90 ℃.
8. The method for preparing super absorbent resin as claimed in claim 1, wherein the surface cross-linking temperature is 120-150 ℃ and the holding time is 40-60 min.
9. The super absorbent resin is characterized in that the super absorbent resin contains a network interpenetrating structure.
10. The super absorbent resin according to claim 9, wherein the super absorbent resin is produced by the production method according to any one of claims 1 to 8.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101240052A (en) * | 2008-02-29 | 2008-08-13 | 厦门大学 | Method for preparing acrylic acid series semi-interpenetration network composite high water absorption resin |
| CN102161725A (en) * | 2011-01-11 | 2011-08-24 | 中国海洋石油总公司 | Method for preparing and modifying polyacrylic acid super-absorbent resin |
| CN103275450A (en) * | 2013-05-31 | 2013-09-04 | 珠海得米新材料有限公司 | Method for preparing super absorbent resin |
| CN108017751A (en) * | 2016-10-31 | 2018-05-11 | 中国石油化工股份有限公司 | A kind of high intensity intercrossed network type water-absorbing resin and preparation method thereof |
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2020
- 2020-12-10 CN CN202011457271.1A patent/CN112552468B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101240052A (en) * | 2008-02-29 | 2008-08-13 | 厦门大学 | Method for preparing acrylic acid series semi-interpenetration network composite high water absorption resin |
| CN102161725A (en) * | 2011-01-11 | 2011-08-24 | 中国海洋石油总公司 | Method for preparing and modifying polyacrylic acid super-absorbent resin |
| CN103275450A (en) * | 2013-05-31 | 2013-09-04 | 珠海得米新材料有限公司 | Method for preparing super absorbent resin |
| CN108017751A (en) * | 2016-10-31 | 2018-05-11 | 中国石油化工股份有限公司 | A kind of high intensity intercrossed network type water-absorbing resin and preparation method thereof |
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| 褚建云等: "半互穿网络聚丙烯酸高吸水树脂的合成及性能", 《四川大学学报（工程科学版）》 * |
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