CN117683392A - Coating dispersing agent with good particle stabilizing effect and preparation method thereof - Google Patents
Coating dispersing agent with good particle stabilizing effect and preparation method thereof Download PDFInfo
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- CN117683392A CN117683392A CN202311418520.XA CN202311418520A CN117683392A CN 117683392 A CN117683392 A CN 117683392A CN 202311418520 A CN202311418520 A CN 202311418520A CN 117683392 A CN117683392 A CN 117683392A
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- 238000000576 coating method Methods 0.000 title claims abstract description 58
- 239000011248 coating agent Substances 0.000 title claims abstract description 56
- 239000002270 dispersing agent Substances 0.000 title claims abstract description 37
- 239000002245 particle Substances 0.000 title claims abstract description 35
- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- HVBSAKJJOYLTQU-UHFFFAOYSA-N 4-aminobenzenesulfonic acid Chemical compound NC1=CC=C(S(O)(=O)=O)C=C1 HVBSAKJJOYLTQU-UHFFFAOYSA-N 0.000 claims abstract description 26
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- -1 hexafluorophosphate Chemical compound 0.000 claims abstract description 26
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004202 carbamide Substances 0.000 claims abstract description 14
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims abstract description 13
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 13
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000176 sodium gluconate Substances 0.000 claims abstract description 13
- 229940005574 sodium gluconate Drugs 0.000 claims abstract description 13
- 235000012207 sodium gluconate Nutrition 0.000 claims abstract description 13
- 229950000244 sulfanilic acid Drugs 0.000 claims abstract description 13
- 150000008064 anhydrides Chemical class 0.000 claims abstract description 12
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 48
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 36
- 238000003756 stirring Methods 0.000 claims description 36
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 6
- 238000011033 desalting Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical group O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- YBBRCQOCSYXUOC-UHFFFAOYSA-N sulfuryl dichloride Chemical group ClS(Cl)(=O)=O YBBRCQOCSYXUOC-UHFFFAOYSA-N 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims 3
- 238000011105 stabilization Methods 0.000 claims 3
- 150000008065 acid anhydrides Chemical class 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000654 additive Substances 0.000 abstract description 2
- 229940114077 acrylic acid Drugs 0.000 abstract 1
- 229960003742 phenol Drugs 0.000 abstract 1
- 239000003973 paint Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 8
- 239000002244 precipitate Substances 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of coating additives, and discloses a coating dispersing agent with good particle stabilizing effect and a preparation method thereof, wherein the coating dispersing agent comprises the following components: acrylic acid, sodium gluconate, sulfanilic acid, phenol, formaldehyde, sulfonating agent, water, urea, hexafluorophosphate and anhydride; the coating dispersing agent prepared by the invention is mainly applied to water-based coating, and can greatly improve the dispersibility of the water-based coating, so that particles in the water-based coating have a higher stabilizing effect, thereby greatly improving the quality of the water-based coating, and further greatly improving the quality of the coating after the water-based coating is used.
Description
Technical Field
The invention relates to the technical field of coating additives, in particular to a coating dispersing agent with good particle stabilizing effect and a preparation method thereof.
Background
The paint has very wide application and can endow articles with color and protection. Pigments are an important component of the paint, which can act as tinting and hiding.
The paint not only protects the value of the coated object, but also plays a good role in decoration due to the rich colors.
Nowadays, with the continuous improvement of environmental protection consciousness of people, organic solvent type coatings are more safe to human health due to volatile formaldehyde, so that more environmental-friendly water-based coatings are greatly developed.
The solid components of the coating, such as pigments and fillers, occupy important components, and their degree of dispersion stability in aqueous systems determines the good and bad properties of the coating.
However, due to insufficient dispersibility, the aqueous coating is easy to precipitate, so that the quality of the aqueous coating is reduced, and the application of the aqueous coating is limited.
Based on the above, we propose a coating dispersant with good particle stabilizing effect, and hopefully solve the defects in the prior art.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a coating dispersing agent with good particle stabilizing effect and a preparation method thereof.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions:
the coating dispersing agent with good particle stabilizing effect is prepared from the following components in parts by weight: 20-25 parts of acrylic acid, 10-12 parts of sodium gluconate, 6-10 parts of sulfanilic acid, 6-8 parts of phenol, 8-10 parts of formaldehyde, 1-2 parts of sulfonating agent, 50-70 parts of water, 4-6 parts of urea, 3-5 parts of hexafluorophosphate and 1-3 parts of anhydride.
As a further technical scheme, the anhydride is maleic anhydride.
As a further technical scheme, the hexafluorophosphate is sodium hexafluorophosphate.
As a further technical scheme: the sulfonating agent is sulfuryl chloride.
A preparation method of a coating dispersing agent with good particle stabilizing effect comprises the following steps: the method comprises the following steps:
(1) Adding phenol into water, and stirring and mixing uniformly at the normal temperature and the rotating speed of 120r/min to obtain a phenol solution;
(2) Adding a phenol solution into a reaction kettle, then introducing inert gas into the reaction kettle, and discharging air in the reaction kettle;
(3) Sequentially adding acrylic acid, sulfonating agent, urea and sulfanilic acid into a reaction kettle, then continuously stirring for 30min, standing for 10min, and regulating the pH value of a mixed system in the reaction kettle to 10.0;
(4) Introducing formaldehyde into the reaction kettle, regulating the temperature to 88 ℃, stirring and reacting for 5 hours, then reducing the temperature to 40 ℃, adding sulfuric acid solution, continuously stirring and reacting for 1 hour, standing and cooling for 2 hours, desalting, and drying to obtain a first component;
(5) And mixing the first component, sodium gluconate and hexafluorophosphate together to obtain the coating dispersing agent.
As a further technical scheme, the inert gas in the step (2) is nitrogen.
As a further technical scheme, in the step (3), the pH of the mixed system in the reaction kettle is regulated by adopting sodium hydroxide solution.
As a further technical scheme: the mass fraction of the sodium hydroxide solution is 5%.
As a further technical scheme: the stirring rotation speed of the stirring reaction in the step (4) is 500r/min.
(III) beneficial effects
Compared with the prior art, the invention provides the coating dispersing agent with good particle stabilizing effect, which has the following beneficial effects:
the coating dispersing agent prepared by the invention is mainly applied to water-based coating, and can greatly improve the dispersibility of the water-based coating, so that particles in the water-based coating have a higher stabilizing effect, thereby greatly improving the quality of the water-based coating, and further greatly improving the quality of the coating after the water-based coating is used.
In the traditional process, the dispersibility of the water-based paint is usually improved by purely mechanical shearing force, but a stable dispersing effect is difficult to achieve, because in the process of mechanical shearing and crushing, the smaller the particle size of paint particles is, the larger the interfacial area between the paint particles and a liquid medium is, the stronger the driving force for reducing the interfacial area is, and the phenomenon of re-agglomeration is easier to occur, so that the dispersing agent prepared by the method can be strongly adsorbed on the surfaces of paint particles, thereby greatly reducing the high surface energy and the physical attraction between the particles, and greatly improving the dispersing stability of the paint particles, and the dispersing stability is good.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The coating dispersing agent with good particle stabilizing effect is prepared from the following components in parts by weight: 20 parts of acrylic acid, 10 parts of sodium gluconate, 6 parts of sulfanilic acid, 6 parts of phenol, 8 parts of formaldehyde, 1 part of sulfonating agent, 50 parts of water, 4 parts of urea, 3 parts of hexafluorophosphate and 1 part of anhydride.
The anhydride is maleic anhydride.
The hexafluorophosphate is sodium hexafluorophosphate.
The sulfonating agent is sulfuryl chloride.
A preparation method of a coating dispersing agent with good particle stabilizing effect comprises the following steps: the method comprises the following steps:
(1) Adding phenol into water, and stirring and mixing uniformly at the normal temperature and the rotating speed of 120r/min to obtain a phenol solution;
(2) Adding a phenol solution into a reaction kettle, then introducing nitrogen into the reaction kettle, and discharging air in the reaction kettle;
(3) Sequentially adding acrylic acid, sulfonating agent, urea and sulfanilic acid into a reaction kettle, then continuously stirring for 30min, standing for 10min, and regulating the pH value of a mixed system in the reaction kettle to 10.0; the pH of the mixed system in the reaction kettle is regulated by adopting sodium hydroxide solution; the mass fraction of the sodium hydroxide solution is 5%.
(4) Introducing formaldehyde into the reaction kettle, regulating the temperature to 88 ℃, stirring and reacting for 5 hours, then reducing the temperature to 40 ℃, adding sulfuric acid solution, continuously stirring and reacting for 1 hour, standing and cooling for 2 hours, desalting, and drying to obtain a first component; the stirring speed of the stirring reaction is 500r/min.
(5) And mixing the first component, sodium gluconate and hexafluorophosphate together to obtain the coating dispersing agent.
Example 2
The coating dispersing agent with good particle stabilizing effect is prepared from the following components in parts by weight: 22 parts of acrylic acid, 11 parts of sodium gluconate, 8 parts of sulfanilic acid, 7 parts of phenol, 8.5 parts of formaldehyde, 1.5 parts of sulfonating agent, 55 parts of water, 5 parts of urea, 3.5 parts of hexafluorophosphate and 2 parts of anhydride.
The anhydride is maleic anhydride.
The hexafluorophosphate is sodium hexafluorophosphate.
The sulfonating agent is sulfuryl chloride.
A preparation method of a coating dispersing agent with good particle stabilizing effect comprises the following steps: the method comprises the following steps:
(1) Adding phenol into water, and stirring and mixing uniformly at the normal temperature and the rotating speed of 120r/min to obtain a phenol solution;
(2) Adding a phenol solution into a reaction kettle, then introducing nitrogen into the reaction kettle, and discharging air in the reaction kettle;
(3) Sequentially adding acrylic acid, sulfonating agent, urea and sulfanilic acid into a reaction kettle, then continuously stirring for 30min, standing for 10min, and regulating the pH value of a mixed system in the reaction kettle to 10.0; the pH of the mixed system in the reaction kettle is regulated by adopting sodium hydroxide solution; the mass fraction of the sodium hydroxide solution is 5%.
(4) Introducing formaldehyde into the reaction kettle, regulating the temperature to 88 ℃, stirring and reacting for 5 hours, then reducing the temperature to 40 ℃, adding sulfuric acid solution, continuously stirring and reacting for 1 hour, standing and cooling for 2 hours, desalting, and drying to obtain a first component; the stirring speed of the stirring reaction is 500r/min.
(5) And mixing the first component, sodium gluconate and hexafluorophosphate together to obtain the coating dispersing agent.
Example 3
The coating dispersing agent with good particle stabilizing effect is prepared from the following components in parts by weight: 24 parts of acrylic acid, 11 parts of sodium gluconate, 8 parts of sulfanilic acid, 7 parts of phenol, 9 parts of formaldehyde, 1.5 parts of sulfonating agent, 60 parts of water, 5.2 parts of urea, 4 parts of hexafluorophosphate and 2.5 parts of anhydride.
The anhydride is maleic anhydride.
The hexafluorophosphate is sodium hexafluorophosphate.
The sulfonating agent is sulfuryl chloride.
A preparation method of a coating dispersing agent with good particle stabilizing effect comprises the following steps: the method comprises the following steps:
(1) Adding phenol into water, and stirring and mixing uniformly at the normal temperature and the rotating speed of 120r/min to obtain a phenol solution;
(2) Adding a phenol solution into a reaction kettle, then introducing nitrogen into the reaction kettle, and discharging air in the reaction kettle;
(3) Sequentially adding acrylic acid, sulfonating agent, urea and sulfanilic acid into a reaction kettle, then continuously stirring for 30min, standing for 10min, and regulating the pH value of a mixed system in the reaction kettle to 10.0; the pH of the mixed system in the reaction kettle is regulated by adopting sodium hydroxide solution; the mass fraction of the sodium hydroxide solution is 5%.
(4) Introducing formaldehyde into the reaction kettle, regulating the temperature to 88 ℃, stirring and reacting for 5 hours, then reducing the temperature to 40 ℃, adding sulfuric acid solution, continuously stirring and reacting for 1 hour, standing and cooling for 2 hours, desalting, and drying to obtain a first component; the stirring speed of the stirring reaction is 500r/min.
(5) And mixing the first component, sodium gluconate and hexafluorophosphate together to obtain the coating dispersing agent.
Example 4
The coating dispersing agent with good particle stabilizing effect is prepared from the following components in parts by weight: 25 parts of acrylic acid, 12 parts of sodium gluconate, 10 parts of sulfanilic acid, 8 parts of phenol, 10 parts of formaldehyde, 2 parts of sulfonating agent, 70 parts of water, 6 parts of urea, 5 parts of hexafluorophosphate and 3 parts of anhydride.
The anhydride is maleic anhydride.
The hexafluorophosphate is sodium hexafluorophosphate.
The sulfonating agent is sulfuryl chloride.
A preparation method of a coating dispersing agent with good particle stabilizing effect comprises the following steps: the method comprises the following steps:
(1) Adding phenol into water, and stirring and mixing uniformly at the normal temperature and the rotating speed of 120r/min to obtain a phenol solution;
(2) Adding a phenol solution into a reaction kettle, then introducing nitrogen into the reaction kettle, and discharging air in the reaction kettle;
(3) Sequentially adding acrylic acid, sulfonating agent, urea and sulfanilic acid into a reaction kettle, then continuously stirring for 30min, standing for 10min, and regulating the pH value of a mixed system in the reaction kettle to 10.0; the pH of the mixed system in the reaction kettle is regulated by adopting sodium hydroxide solution; the mass fraction of the sodium hydroxide solution is 5%.
(4) Introducing formaldehyde into the reaction kettle, regulating the temperature to 88 ℃, stirring and reacting for 5 hours, then reducing the temperature to 40 ℃, adding sulfuric acid solution, continuously stirring and reacting for 1 hour, standing and cooling for 2 hours, desalting, and drying to obtain a first component; the stirring speed of the stirring reaction is 500r/min.
(5) And mixing the first component, sodium gluconate and hexafluorophosphate together to obtain the coating dispersing agent.
Comparative example 1
On the basis of the embodiment 1, urea is not added, and the rest technical schemes are unchanged.
Comparative example 2
On the basis of the example 1, no hexafluorophosphate is added, and the rest technical schemes are unchanged.
Test
The test paint is a water-based acrylic resin paint, the content of the water-based acrylic resin is 70%, and 5% by mass of the dispersing agent of the example and the dispersing agent of the comparative example are respectively added for test comparison:
control group: no dispersant is added;
the aqueous coating samples of the examples and comparative examples were stirred at 1000r/min for 30min and then allowed to stand for 20 hours, comparing the precipitation conditions of each group:
TABLE 1
| Precipitation conditions | |
| Example 1 | No precipitate |
| Example 2 | No precipitate |
| Example 3 | No precipitate |
| Example 4 | No precipitate |
| Comparative example 1 | Small amount of precipitate |
| Comparative example 2 | Microprecipitation of |
| Control group | Mass precipitation |
As can be seen from Table 1, the dispersant prepared by the present invention has a good stabilizing effect on paint particles after use.
The low temperature flexibility and wet base bond strength were tested according to the standard of GB_T 16777-2008:
TABLE 2
| Bond strength/MPa | |
| Example 1 | 1.82 |
| Example 2 | 1.76 |
| Example 3 | 1.79 |
| Example 4 | 1.80 |
| Comparative example 1 | 1.43 |
| Comparative example 2 | 1.55 |
| Control group | 1.24 |
It can be seen from table 2 that the adhesive strength of the coating can be effectively improved by introducing the dispersant of the present invention.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The coating dispersing agent with good particle stabilizing effect is characterized by comprising the following components in parts by weight: 20-25 parts of acrylic acid, 10-12 parts of sodium gluconate, 6-10 parts of sulfanilic acid, 6-8 parts of phenol, 8-10 parts of formaldehyde, 1-2 parts of sulfonating agent, 50-70 parts of water, 4-6 parts of urea, 3-5 parts of hexafluorophosphate and 1-3 parts of anhydride.
2. The coating dispersion having a good particle stabilizing effect according to claim 1, wherein the acid anhydride is maleic anhydride.
3. The coating dispersion having a good particle stabilizing effect according to claim 1, wherein the hexafluorophosphate is sodium hexafluorophosphate.
4. The coating dispersion having a good particle stabilizing effect according to claim 1, wherein: the sulfonating agent is sulfuryl chloride.
5. The method for preparing a coating dispersant with good particle stabilization effect according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
(1) Adding phenol into water, and stirring and mixing uniformly at the normal temperature and the rotating speed of 120r/min to obtain a phenol solution;
(2) Adding a phenol solution into a reaction kettle, then introducing inert gas into the reaction kettle, and discharging air in the reaction kettle;
(3) Sequentially adding acrylic acid, sulfonating agent, urea and sulfanilic acid into a reaction kettle, then continuously stirring for 30min, standing for 10min, and regulating the pH value of a mixed system in the reaction kettle to 10.0;
(4) Introducing formaldehyde into the reaction kettle, regulating the temperature to 88 ℃, stirring and reacting for 5 hours, then reducing the temperature to 40 ℃, adding sulfuric acid solution, continuously stirring and reacting for 1 hour, standing and cooling for 2 hours, desalting, and drying to obtain a first component;
(5) And mixing the first component, sodium gluconate and hexafluorophosphate together to obtain the coating dispersing agent.
6. The method for producing a coating dispersion having a good particle stabilizing effect according to claim 5, wherein the inert gas in the step (2) is nitrogen.
7. The method for preparing a coating dispersant with good particle stabilizing effect according to claim 5, wherein the adjusting of the pH of the mixed system in the reaction vessel in step (3) is performed by using sodium hydroxide solution.
8. The method for preparing a coating dispersant with good particle stabilization effect according to claim 7, wherein: the mass fraction of the sodium hydroxide solution is 5%.
9. The method for preparing a coating dispersant with good particle stabilization effect according to claim 1, wherein the method comprises the following steps: the stirring rotation speed of the stirring reaction in the step (4) is 500r/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311418520.XA CN117683392A (en) | 2023-10-30 | 2023-10-30 | Coating dispersing agent with good particle stabilizing effect and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311418520.XA CN117683392A (en) | 2023-10-30 | 2023-10-30 | Coating dispersing agent with good particle stabilizing effect and preparation method thereof |
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| Publication Number | Publication Date |
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| CN117683392A true CN117683392A (en) | 2024-03-12 |
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| Country | Link |
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