CN112608630B - Hydrophobic coating liquid and preparation method and application thereof - Google Patents
Hydrophobic coating liquid and preparation method and application thereof Download PDFInfo
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- CN112608630B CN112608630B CN202011406889.5A CN202011406889A CN112608630B CN 112608630 B CN112608630 B CN 112608630B CN 202011406889 A CN202011406889 A CN 202011406889A CN 112608630 B CN112608630 B CN 112608630B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
Abstract
The invention relates to a preparation method and application of a hydrophobic coating liquid, and belongs to the technical field of hydrophobic materials. The hydrophobic coating liquid of the present invention comprises the following components: silane coupling agents, styrene, modified polyvinyl chloride, polyimide, thermoplastic polyurethane elastomers, 2-ethylhexyl acrylate, hydrophobic modifiers, methacrylates, and acrylates. The hydrophobic coating liquid can adjust the roughness of the surface of the filler and increase hydrophobic groups, so that the phase separation effect of ethyl acetate and water is improved, and the quick phase separation of ethyl acetate and water under short retention time is realized; in addition, the hydrophobic function of the hydrophobic coating liquid can be maintained for a long time, and the hydrophobic coating liquid is not polluted by the surfaces of other impurities in the production process.
Description
Technical Field
The invention relates to a preparation method and application of a hydrophobic coating liquid, and belongs to the technical field of hydrophobic materials.
Background
Ethyl acetate is an important basic organic chemical raw material, and is often used as an organic solvent, an extractant and a dehydrating agent in the industries of medicine, collodion, nitrocellulose, varnish, artificial leather, plastics and spices because of its good solubility to many substances. However, in the production process of ethyl acetate, an azeotrope can be formed with other substances such as water or ethanol, and the content of water in the separation process has a great influence on the production energy consumption, so that the reduction of the content of water in ethyl acetate in the production process plays an important role in reducing the equipment investment and the operation cost.
The phase separator is phase separating equipment frequently used in chemical separation process engineering, and the principle of the phase separator is mainly to remove impurities and water by utilizing the gravity settling principle according to the density difference of a water phase and an organic phase. The traditional phase splitter has low phase splitting efficiency, and needs enough residence time to ensure the phase splitting effect, so the floor area of the traditional phase splitter is generally larger, and the separation capacity of the phase splitter is reduced due to continuous use.
In order to improve the phase separation effect of the ethyl acetate and the water in the phase separator, effectively improve the phase separation effect of the ethyl acetate and the water in a short residence time without back mixing, the modification of the filler in the phase separator is necessary.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the hydrophobic coating liquid, the preparation method and the application thereof.
In order to achieve the purpose, the invention adopts the technical scheme that: the hydrophobic coating liquid is prepared from the following raw materials in parts by weight: 10-30 parts of silane coupling agent, 30-50 parts of styrene, 2-10 parts of polyimide, 0.5-5 parts of thermoplastic polyurethane elastomer, 10-30 parts of acrylic acid-2-ethylhexyl ester, 2-30 parts of hydrophobic modifier, 5-10 parts of initiator, 30-150 parts of methacrylate and 5-30 parts of acrylate.
The silane coupling agent is used as a crosslinking promoter and an adhesion promoter, can improve the weather resistance, stability and chemical resistance of the coating liquid, has little effect of improving the adhesion of a small amount of the silane coupling agent to the coating, and influences the hydrophobicity of the coating liquid when the silane coupling agent is used in an excessive amount. Studies have shown that the organofunctional groups of the silanes react with other monomers to produce crosslinking through the silanol functional group bonding to the substrate. The silane coupling agent and the hydrophobic modifier can form an organic silicon oligomer, and can improve the stability and hydrophobicity of the coating liquid. The initiator may improve the robustness of the coating solution.
Preferably, the ratio of the thermoplastic polyurethane elastomer to the hydrophobic modifier is 1:1 to 40. The thermoplastic polyurethane elastomer and the hydrophobic modifier are both hydrophobic materials of low surface tension, preferably in proportions that increase the hydrophobic properties of the hydrophobic coating fluid.
In a preferred embodiment of the hydrophobic coating solution of the present invention, the silane coupling agent is at least one of vinyltrichlorosilane, vinyltrimethyloxysilane, vinyltriethyloxysilane, vinyltri-tert-butylperoxysilane, and methacryloxypropyltrimethoxysilane.
In a preferred embodiment of the hydrophobic coating liquid of the present invention, the hydrophobic modifier is at least one of 1H, 2H-perfluorooctyldimethylchlorosilane, 1H, 2H-perfluorodecyltrichlorosilane, trimethylchlorosilane, methyltrimethoxysilane, triethoxymethylsilane, and hexamethyldisilazane.
As a preferable embodiment of the hydrophobic coating liquid of the present invention, the initiator is at least one of tert-ethyl peroxybenzoate, benzoyl peroxide, tert-amyl 2-ethylhexyl peroxide, and tert-ethyl 2-ethylhexyl peroxide.
In a preferred embodiment of the hydrophobic coating liquid of the present invention, the methacrylic acid ester is at least one of methyl methacrylate, ethyl methacrylate, propyl methacrylate, and butyl methacrylate.
In a preferred embodiment of the hydrophobic coating liquid of the present invention, the acrylic ester is at least one of methyl acrylate, ethyl acrylate, and butyl acrylate.
In a second aspect, the present invention provides a method for preparing the above hydrophobic coating liquid: weighing the components in the hydrophobic coating liquid according to the proportion, and heating and stirring to obtain the hydrophobic coating liquid.
Preferably, the heating and stirring temperature is 80-200 ℃, and the heating and stirring time is 5-15 h. The stable hydrophobic coating liquid cannot be formed at a low heating and stirring temperature and a short heating and stirring time.
The invention also provides application of the hydrophobic coating liquid in phase separator filling.
The invention also provides a phase separator filler formed from the hydrophobic coating liquid of the invention.
Preferably, the preparation method of the phase separator filler comprises the following steps: weighing each component in the hydrophobic coating liquid according to a proportion, heating and stirring to obtain the hydrophobic coating liquid, then smearing the hydrophobic coating liquid on the surface of the filler, and standing to form a film; and finally calcining the mixture in a protective gas atmosphere to obtain the phase separator filler.
The calcination temperature and calcination time affect the adhesion and stability of the hydrophobic coating solution on the filler surface.
Preferably, the protective gas is one of nitrogen, argon and helium.
Preferably, the calcining temperature is 50-200 ℃, and the calcining time is 1-5 h.
Compared with the prior art, the invention has the beneficial effects that: the hydrophobic coating liquid can adjust the surface roughness of the filler, increase hydrophobic groups, effectively improve the phase separation of ethyl acetate and water in short retention time without back mixing, and simultaneously can keep the hydrophobic property for a long time.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
An example of the hydrophobic coating liquid of the present invention, the composition of the hydrophobic coating liquid of this example is shown in table 1. The preparation method of the hydrophobic coating liquid comprises the following steps: the components of the hydrophobic coating solution were weighed as shown in table 1, mixed and heated to 100 ℃ and stirred for 5h to obtain the hydrophobic coating solution.
The preparation method of the phase separator filler comprises the following steps: coating the hydrophobic coating liquid on the surface of a filler, and standing to form a film; and finally, calcining the filler at 100 ℃ for 2h in a nitrogen atmosphere to obtain the phase separator filler.
Example 2
An example of the hydrophobic coating liquid of the present invention, the composition of the hydrophobic coating liquid of this example is shown in table 1. The preparation method of the hydrophobic coating liquid comprises the following steps: the components of the hydrophobic coating solution were weighed as shown in table 1, mixed and heated to 200 ℃ and stirred for 10h to obtain the hydrophobic coating solution.
The preparation method of the phase separator filler comprises the following steps: coating the hydrophobic coating liquid on the surface of a filler, and standing to form a film; and finally, calcining the filler at 200 ℃ for 2h in a nitrogen atmosphere to obtain the phase separator filler.
Example 3
An example of the hydrophobic coating liquid of the present invention, the composition of the hydrophobic coating liquid of this example is shown in table 1. The preparation method of the hydrophobic coating liquid comprises the following steps: the components of the hydrophobic coating solution were weighed as shown in table 1, mixed and heated to 80 ℃ and stirred for 15h to obtain the hydrophobic coating solution.
The preparation method of the phase separator filler comprises the following steps: coating the hydrophobic coating liquid on the surface of a filler, and standing to form a film; and finally, calcining the filler at 200 ℃ for 5 hours in a nitrogen atmosphere to obtain the phase separator filler.
Example 4
An example of the hydrophobic coating liquid of the present invention, the composition of the hydrophobic coating liquid of this example is shown in table 1. The preparation method of the hydrophobic coating liquid comprises the following steps: the components of the hydrophobic coating solution were weighed as shown in table 1, mixed and heated to 150 ℃ and stirred for 10h to obtain the hydrophobic coating solution.
The preparation method of the phase separator filler comprises the following steps: coating the hydrophobic coating liquid on the surface of a filler, and standing to form a film; and finally, calcining the filler at 50 ℃ for 5 hours in a nitrogen atmosphere to obtain the phase separator filler.
Example 5
An example of the hydrophobic coating liquid of the present invention, the composition of the hydrophobic coating liquid of this example is shown in table 1. The preparation method of the hydrophobic coating liquid comprises the following steps: the components of the hydrophobic coating solution were weighed as shown in table 1, mixed and heated to 200 ℃ and stirred for 10h to obtain the hydrophobic coating solution.
The preparation method of the phase separator filler comprises the following steps: coating the hydrophobic coating liquid on the surface of a filler, and standing to form a film; and finally, calcining the filler at 200 ℃ for 1h in a nitrogen atmosphere to obtain the phase separator filler.
Example 6
An example of the hydrophobic coating liquid of the present invention, the composition of the hydrophobic coating liquid of this example is shown in table 1. The preparation method of the hydrophobic coating liquid comprises the following steps: the components of the hydrophobic coating solution were weighed as shown in table 1, mixed and heated to 200 ℃ and stirred for 10h to obtain the hydrophobic coating solution.
The preparation method of the phase separator filler comprises the following steps: coating the hydrophobic coating liquid on the surface of a filler, and standing to form a film; and finally, calcining the filler at 200 ℃ for 2h in a nitrogen atmosphere to obtain the phase separator filler.
TABLE 1 composition of hydrophobic coating solution
Comparative example 1
A comparative example of a hydrophobic coating solution of the present invention, the hydrophobic coating solution of the present invention was prepared by the method comprising: weighing 50 parts of styrene, 5 parts of polyimide, 2 parts of thermoplastic polyurethane elastomer, 10 parts of 2-ethylhexyl acrylate, 10 parts of benzoyl peroxide, 150 parts of ethyl methacrylate and 30 parts of ethyl acrylate, mixing, heating to 200 ℃, and stirring for 10 hours to obtain the hydrophobic coating liquid.
The preparation method of the phase separator filler comprises the following steps: and (3) coating the hydrophobic coating liquid on the surface of a filler, standing to form a film, and finally calcining the filler at 200 ℃ for 2h in a helium atmosphere to obtain the phase separator filler.
Effect example 1
This effect example investigates the effect of the hydrophobic coating solution of the present invention on solvent-resistant wiping. The specific method for investigation is as follows: at normal temperature and normal pressure, the surface of a filler piece with the hydrophobic coating liquid is wiped clean by water, after natural drying, three solutions of ethyl acetate, water and a mixed solution of ethyl acetate and water (92 wt% ethyl acetate and 8 wt% water) are dipped into absorbent cotton to be in a wet state (no liquid drop is dropped by squeezing with a hand), the absorbent cotton is placed in the center of the absorbent cotton after being placed on the surface of the filler piece, the absorbent cotton is wiped back and forth, after a test, a sample is subjected to appearance inspection, and whether a piece film is damaged or not and an internal ceramic layer is exposed under sunlight is visually inspected. The test results are shown in tables 2, 3 and 4.
TABLE 2 Effect of wiping with Water
| Number of times of wiping1 | 50 | 100 | 200 | 300 | 400 | 500 |
| Example 1 | Whether or not | Whether or not | Whether or not | Whether or not | Whether or not | Whether or not |
| Example 2 | Whether or not | Whether or not | Whether or not | Whether or not | Whether or not | Whether or not |
| Example 3 | Whether or not | Whether or not | Whether or not | Whether or not | Whether or not | Whether or not |
| Example 4 | Whether or not | Whether or not | Whether or not | Whether or not | Whether or not | Whether or not |
| Example 5 | Whether or not | Whether or not | Whether or not | Whether or not | Whether or not | Whether or not |
| Example 6 | Whether or not | Whether or not | Whether or not | Whether or not | Whether or not | Whether or not |
| Comparative example 1 | Whether or not | Whether or not | Whether or not | Whether or not | Whether or not | Whether or not |
TABLE 3 wiping effect with ethyl acetate
TABLE 4 wiping effect with a mixed solution of ethyl acetate and water (92% by weight of ethyl acetate + 8% by weight of water)
1One time of wiping
Comparing examples 1 to 6 with comparative example 1, it can be seen that the hydrophobic coating liquid of the present invention has solvent corrosion resistance.
Effect example 2
This effect example examined the effect of the hydrophobic coating liquid of the present invention in separating ethyl acetate and water. The specific method for investigation is as follows: and (3) placing the filler with the hydrophobic coating liquid in a rectangular device, and ensuring that the right side has a margin space for observing and sampling the layered solution. Under normal temperature and pressure, 1L of ethyl acetate with the mass fraction of 92 wt% and 8 wt% of water (feeding according to azeotropic composition) are mixed and stirred uniformly, then the mixture is poured into the filler from the left side of the filler rapidly, the flow rate of the mixture flows through the filler and becomes slow, and then the upper ester phase result is taken from the right side for water content analysis. The results are shown in Table 5.
TABLE 5 Effect of hydrophobic coating solution on separating ethyl acetate from water
As can be seen from Table 5, for the hydrophobic coating liquid of the present invention, the hydrophobic coating liquid can improve the effect of separating ethyl acetate from water, while the comparative example 1 shows that the separation effect is greatly reduced without adding a silane coupling agent and a hydrophobic modifier, which indicates that the composition of the coating liquid of the present invention is reasonable.
Effect example 3
The effect example examines the continuous phase separation capability of the hydrophobic coating liquid of the invention on the ethyl acetate/water mixed liquid. The specific method for investigation is as follows: the packing with the hydrophobic coating liquid of examples 1 to 6 and comparative example 1 were placed in a rectangular apparatus, and the layered solution was observed and sampled with the allowance space secured to the right side. Under normal temperature and pressure, 100L of ethyl acetate with the mass fraction of 92 wt% and water (azeotropic composition) with the mass fraction of 8 wt% are continuously mixed and stirred uniformly by a pump, then the mixed solution is poured into the filler from the left side of the filler rapidly, the flow rate of the mixed solution is reduced after the mixed solution flows through the filler, and then the upper ester phase result is taken from the right side for water content analysis. The results are shown in Table 6.
TABLE 6 continuous phase separation Capacity of hydrophobic coating solution to Ethyl acetate/Water mixture
| Amount of treated liquid/L | 5 | 10 | 20 | 30 | 40 | 50 | 100 |
| Example 1 Water content/%) | 3.1 | 3.1 | 3.1 | 3.1 | 3.1 | 3.1 | 3.2 |
| Example 2 Water content/%) | 2.8 | 2.8 | 2.8 | 2.8 | 2.9 | 2.9 | 2.9 |
| Example 3 Water content/%) | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 |
| Example 4 Water content/%) | 2.4 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
| Example 5 Water content/%) | 3.5 | 3.5 | 3.5 | 3.5 | 3.6 | 3.6 | 3.6 |
| Example 6 Water content/%) | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.6 | 2.6 |
| Comparative example 1 Water content/%) | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 |
As can be seen from table 6, 100L of the ethyl acetate/water mixture can be continuously treated with the hydrophobic coating liquid of the present invention without increasing the water content in the ethyl acetate/water mixture.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. The application of the hydrophobic coating liquid in the phase separator filler is characterized in that the hydrophobic coating liquid comprises the following components in parts by weight: 10-30 parts of silane coupling agent, 30-50 parts of styrene, 2-10 parts of polyimide, 0.5-5 parts of thermoplastic polyurethane elastomer, 10-30 parts of 2-ethylhexyl acrylate, 2-30 parts of hydrophobic modifier, 5-10 parts of initiator, 30-150 parts of methacrylate and 5-30 parts of acrylate; the preparation method of the hydrophobic coating liquid comprises the following steps: weighing the components in the hydrophobic coating liquid according to a proportion, mixing, and heating and stirring to obtain the hydrophobic coating liquid, wherein the heating and stirring temperature is 80-200 ℃, and the heating and stirring time is 5-15 h.
2. The use of claim 1, wherein the ratio of the thermoplastic polyurethane elastomer to the hydrophobic modifier is from 1:1 to 40.
3. The use according to claim 1, wherein the silane coupling agent is at least one of vinyltrichlorosilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltri-tert-butylperoxysilane, methacryloxypropyltrimethoxysilane.
4. The use of claim 1, wherein the hydrophobic modifier is at least one of 1H, 2H-perfluorooctyldimethylchlorosilane, 1H, 2H-perfluorodecyltrichlorosilane, trimethylchlorosilane, methyltrimethoxysilane, triethoxymethylsilane, hexamethyldisilazane.
5. The use of claim 1, wherein the initiator is at least one of benzoyl peroxide and tert-amyl 2-ethylhexanoate peroxide.
6. The use of claim, wherein the methacrylate is at least one of methyl methacrylate, ethyl methacrylate, propyl methacrylate, and butyl methacrylate.
7. The use of claim 1, wherein the acrylate is at least one of methyl acrylate, ethyl acrylate, and butyl acrylate.
8. The phase separator filler is characterized by comprising a hydrophobic coating liquid, wherein the hydrophobic coating liquid comprises the following components in parts by weight: 10-30 parts of silane coupling agent, 30-50 parts of styrene, 2-10 parts of polyimide, 0.5-5 parts of thermoplastic polyurethane elastomer, 10-30 parts of 2-ethylhexyl acrylate, 2-30 parts of hydrophobic modifier, 5-10 parts of initiator, 30-150 parts of methacrylate and 5-30 parts of acrylate; the preparation method of the hydrophobic coating liquid comprises the following steps: weighing the components in the hydrophobic coating liquid according to a proportion, mixing, heating and stirring to obtain the hydrophobic coating liquid, wherein the heating and stirring temperature is 80-200 ℃, and the heating and stirring time is 5-15 hours; the preparation method of the phase separator filler comprises the following steps: (1) coating the hydrophobic coating liquid on the surface of the filler, and standing to form a film; (2) and (2) calcining the film obtained in the step (1) for 1-5 hours at the temperature of 50-200 ℃ in a protective gas atmosphere to obtain the phase separator filler.
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| CN202011406889.5A CN112608630B (en) | 2020-12-04 | 2020-12-04 | Hydrophobic coating liquid and preparation method and application thereof |
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| CN112608630B true CN112608630B (en) | 2022-03-22 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107141992A (en) * | 2017-05-23 | 2017-09-08 | 天津天盈新型建材有限公司 | A kind of super-hydrophobic transparent coating liquid and preparation method thereof |
| CN109504257A (en) * | 2018-10-29 | 2019-03-22 | 国电新能源技术研究院有限公司 | A kind of hydrophobic coating |
| CN110358015A (en) * | 2019-06-26 | 2019-10-22 | 嘉宝莉化工集团股份有限公司 | A kind of self-lubricating hydrophobic silicone acrylic emulsion and its preparation method and application |
| CN110564280A (en) * | 2019-08-20 | 2019-12-13 | 国电新能源技术研究院有限公司 | Double-component fluorine-containing hydrophobic coating and preparation and use methods thereof |
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2020
- 2020-12-04 CN CN202011406889.5A patent/CN112608630B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107141992A (en) * | 2017-05-23 | 2017-09-08 | 天津天盈新型建材有限公司 | A kind of super-hydrophobic transparent coating liquid and preparation method thereof |
| CN109504257A (en) * | 2018-10-29 | 2019-03-22 | 国电新能源技术研究院有限公司 | A kind of hydrophobic coating |
| CN110358015A (en) * | 2019-06-26 | 2019-10-22 | 嘉宝莉化工集团股份有限公司 | A kind of self-lubricating hydrophobic silicone acrylic emulsion and its preparation method and application |
| CN110564280A (en) * | 2019-08-20 | 2019-12-13 | 国电新能源技术研究院有限公司 | Double-component fluorine-containing hydrophobic coating and preparation and use methods thereof |
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