UV hardening liquid composition, preparation method and oil cup

Abstract

The invention discloses a UV hardening liquid composition, a preparation method and an oil cup, and belongs to the technical field of coatings and preparation methods thereof. The composition is prepared from the following components in parts by weight: 20 to 50 parts of acrylic ester; 5 to 10 parts of a photoinitiator; 0.5 to 2.0 parts of a titanate coupling agent; 0.2 to 1.0 part of a wetting agent; 0.1 to 0.5 part of a leveling agent; 50 to 80 parts of a solvent; wherein the photoinitiator is an acylphosphine oxide. The scratch-resistant and durable UV hardening liquid composition can be further used for coating the surface of an oil cup, so that the oil cup is resistant to scratch, and aging caused by corrosion of a cleaning agent is prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of coatings and preparation methods thereof, and particularly relates to a UV coating composition, a preparation method and an oil cup. Background Art

[0002] With the continuous improvement of people's living standards, most kitchens are equipped with range hoods. The range hood can allow the air with oil smoke to be discharged from the kitchen through the exhaust duct, which can reduce the choking smell in the kitchen. In addition, exhausting oil smoke through the range hood can reduce the oil smoke inhaled by the human body, which is beneficial to the health of the body.

[0003] During the use of the range hood, the negative pressure generated by the high-speed rotation of the impeller will carry away the generated oil smoke. As a result, the filter and inner cavity of the range hood will store a large amount of grease, which will eventually flow into the oil collector, that is, the oil cup. When the old oil in the oil cup accumulates to a certain amount, it must be removed for cleaning. The old oil at the bottom of the oil cup will condense into a relatively stubborn sediment, which requires a very strong alkaline detergent to clean, which is time-consuming and laborious. Alkaline detergents will also cause accelerated aging of the oil cup. At present, there are still a large number of resin oil cups in the industry. Many oil cups are made of PC material, with low surface hardness, insufficient scratch resistance and aging resistance. Therefore, it is very necessary to develop a UV curing liquid with high surface hardness, scratch resistance and aging resistance to improve the performance of the oil cup. Summary of the invention

[0004] In order to solve the above technical problems, the present application improves the components of the coating in order to obtain a scratch-resistant and durable coating. One of the purposes of the present invention is to provide a UV curing liquid composition, the second purpose is to provide a preparation method of the corresponding coating, and the third purpose is to provide a corresponding oil cup.

[0005] The specific technical solution is described below:

[0006] A UV curing liquid composition, comprising the following components in parts by weight:

[0007] Acrylate, 20-50 parts;

[0008] Photoinitiator, 5-10 parts;

[0009] Titanate coupling agent, 0.5-2.0 parts;

[0010] Wetting agent, 0.2-1.0 part;

[0011] Leveling agent, 0.1-0.5 parts;

[0012] Solvent, 50-80 parts;

[0013] Wherein, the photoinitiator is acylphosphine oxide.

[0014] The inventor's core idea is to first ensure the formation of a dense coating, while taking into account the coating's bonding strength, distribution uniformity, and impact resistance, thereby comprehensively enhancing the coating's durability and scratch resistance.

[0015] In the above technical solution, acylphosphine oxide is used as a photoinitiator. This photoinitiator has a greater absorption capacity for light in the ultraviolet and visible light regions. Therefore, after photolysis, it will produce free radicals with high initiation activity. Compared with other types of photoinitiators, it can initiate curing more thoroughly and form a denser coating.

[0016] On the basis of density, the titanate coupling agent in the technical solution has multiple addition effects:

[0017] a. First, it can react with the hydroxyl groups on the surface to be coated, enhance the bonding force between the coating and the coated surface, and prevent the coating from falling off;

[0018] b. Secondly, it can react with the ester group in the acrylate to increase the viscosity of the coating system, making the coating more evenly distributed and less likely to have weak coating areas;

[0019] c. Furthermore, the organic skeleton in the titanate coupling agent provides flexibility to the coating and improves the impact resistance of the coating.

[0020] Therefore, under the premise that the coating is tough and durable enough, the surface of the oil cup is protected and is not easily scratched and is not easily corroded and aged by alkaline cleaning agents.

[0021] Preferably, the photoinitiator is selected from one or more of phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, bisacylphosphine oxide, carbazolylacylphosphine oxide, diphenylphosphine oxide, and diarylphosphine oxide.

[0022] Preferably, the titanate coupling agent is selected from one or more of trioleyl isopropyl titanate, triisostearoyl isopropyl titanate, isopropyl tri(dioctyl pyrophosphate) titanate, and tetraisopropyl di(dioctyl phosphite) titanate.

[0023] Further preferably, the ratio of the photoinitiator to the titanate coupling agent is (3.33-8.75):1.

[0024] The inventors found through further research that the ideal anti-scratch effect can only be achieved when the ratio of the photoinitiator to the titanate coupling agent is within a certain range;

[0025] If the ratio is too low, the coating will not be dense enough and will be easily scratched, and the scratch resistance will not be ideal.

[0026] If the ratio is too high, the coating's bonding strength, distribution uniformity and impact resistance will be insufficient, and the scratch resistance will also fail to meet high standards.

[0027] Preferably, the acrylic ester is selected from one or more of epoxy acrylic resin, polyester acrylic resin, vinyl acrylate, bismaleimide acrylate, thermosetting polyimide acrylate, and cyanate acrylate.

[0028] Preferably, the wetting agent is selected from one or more of MOK-5011, MOK-5027 and MOK-5035 produced by Merck KGaA Darmstadt, Germany. The leveling agent is selected from one or more of MOK-2021, MOK-2024 and MOK-2100 produced by Merck KGaA Darmstadt, Germany.

[0029] Preferably, the solvent is selected from one or more of propylene glycol methyl ether, butyl acetate, isobutyl alcohol, methyl isobutyl ketone and ethyl acetate.

[0030] A method for preparing a UV curing solution, using the composition described in any of the above technical solutions, and comprising the following steps:

[0031] (S1): stirring the solvent, acrylate and photoinitiator uniformly;

[0032] (S2): Add wetting agent and leveling agent and stir evenly;

[0033] (S3): adding a titanate coupling agent, stirring evenly, filtering and / or degassing to obtain a coating.

[0034] An oil cup, the surface of which is coated with a coating formed by the composition described in any of the above technical solutions, or coated with a coating formed by the hardening liquid prepared by the above preparation method.

[0035] In summary, the technical solution of the present invention has the following main beneficial effects:

[0036] Compared with the prior art, the technical solution of the present invention comprehensively considers the density, bonding strength, distribution uniformity and impact resistance of the coating, thereby obtaining a scratch-resistant and durable UV curing liquid composition, which can be further used to coat the surface of the oil cup to make it scratch-resistant and prevent aging caused by cleaning agent erosion.

[0037] Further or more detailed beneficial effects will be described in detail in conjunction with specific examples in the specific implementation manner. DETAILED DESCRIPTION

[0038] The present invention is further explained with reference to the following embodiments:

[0039] The core technical problem faced by the technical solution of the embodiment of the present application comes from the inventor's accurate understanding of the prior art. Therefore, how to obtain a scratch-resistant and aging-resistant coating is a technical problem that the inventor urgently needs to solve.

[0040] It should be noted that the embodiments do not constitute a limitation on the protection scope of the claims of the present invention. According to the technical concepts provided / proven by the embodiments, all technical solutions that can be reasonably anticipated by technicians in the relevant technical field should be included in the protection scope of the claims of the present invention.

[0041] The embodiments are described in detail as follows:

[0042] The preparation method of UV curing solution is as follows:

[0043] (S1): Add 20 to 50 parts of acrylic acid ester and 5 to 10 parts of acylphosphine oxide to 50 to 80 parts of solvent under stirring and stir evenly;

[0044] (S2): Add 0.2-1.0 parts of wetting agent and 0.1-0.5 parts of leveling agent, and continue stirring and dispersing for 20 minutes;

[0045] (S3): adding 0.5 to 2.0 parts of titanate coupling agent, continuing to stir and disperse for 10 minutes, filtering through 200 mesh, and then vacuum degassing to obtain UV curing solution.

[0046] The above parts are parts by weight.

[0047] in:

[0048] The acrylate is one or more of epoxy acrylate resin, polyester acrylate resin, vinyl acrylate, bismaleimide acrylate, thermosetting polyimide acrylate, and cyanate acrylate;

[0049] The photoinitiator is one or more of phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, bisacylphosphine oxide, carbazolylacylphosphine oxide, diphenylphosphine oxide, and diarylphosphine oxide;

[0050] The titanate coupling agent is one or more of trioleyl isopropyl titanate, triisostearoyl isopropyl titanate, isopropyl tri(dioctyl pyrophosphate) titanate, and tetraisopropyl di(dioctyl phosphite) titanate;

[0051] The wetting agent is one or more of MOK-5011, MOK-5027, and MOK-5035 produced by Merck KGaA, Darmstadt, Germany;

[0052] The leveling agent is selected from one or more of MOK-2021, MOK-2024 and MOK-2100 produced by Merck KGaA Darmstadt, Germany;

[0053] The solvent is one or more of propylene glycol methyl ether, butyl acetate, isobutyl alcohol, methyl isobutyl ketone and ethyl acetate.

[0054] The formulations of the UV coating compositions described in Examples 1 to 4 are shown in Table 1 below:

[0055] Table 1 Formulation of UV coating composition described in Examples 1 to 4

[0056]

[0057] Taking commercially available hardening liquids HD-8152 and FC-220 of Dongguan Haidi New Materials as comparative examples 1 and 2 respectively, the UV hardening liquids prepared in Examples 1 to 4 and Comparative Examples 1 to 2 were sprayed on transparent PC materials (cleaned with isopropyl alcohol, degreased, and destaticized), and the properties of the coatings were measured after UV curing. The curing conditions are shown in Table 2:

[0058] Table 2 Spraying and curing conditions of UV curing liquid coating

[0059]

[0060] The film properties of Examples 1 to 4 and Comparative Examples 1 to 2 are shown in Table 3:

[0061] Table 3 Performance test results

[0062]

[0063] It can be seen from Table 3 that the coatings prepared in Examples 1 to 4 have excellent high hardness and high adhesion effect compared with equivalent commercial products. The test method for scratch resistance is: scratch the coating surface with steel wool at a load of 500g, and test it in groups of 500 times until visible scratches appear, and record the number of scratches before scratches appear.

[0064] Example 5: Compared with Example 4, the only difference is that the amount of photoinitiator is reduced to 6.7 parts, and the ratio of photoinitiator to titanate coupling agent is 3.33:1.

[0065] Example 6: Compared with Example 4, the only difference is that the amount of photoinitiator is increased to 17.5 parts, and the ratio of photoinitiator to titanate coupling agent is 8.75:1.

[0066] Comparative Example 3: Compared with Example 4, the only difference is that the amount of photoinitiator is reduced to 6.3 parts, and the ratio of photoinitiator to titanate coupling agent is 3.15:1.

[0067] Comparative Example 4: Compared with Example 4, the only difference is that the amount of photoinitiator is reduced to 18 parts, and the ratio of photoinitiator to titanate coupling agent is 9:1.

[0068] Table 4 Performance test results of Examples 5-6 and Comparative Examples 3-4

[0069]

[0070]

[0071] As can be seen from Table 4, Examples 4, 5 to 6 demonstrate that within the preferred range of the ratio of photoinitiator to titanate coupling agent of (3.33 to 8.75):1, the hardness, adhesion and scratch resistance of the film layer all meet the use requirements.

[0072] In Comparative Example 3, the ratio of the photoinitiator to the titanate coupling agent is less than 3.33. Compared with Example 5, the ratio of the photoinitiator to the titanate coupling agent is slightly reduced, and the scratch resistance of the coating is reduced to 3500 times, and the hardness is reduced by one level after treatment. This should be because the content of the photoinitiator is less, which makes the density of the coating decrease;

[0073] In Comparative Example 4, the ratio of photoinitiator to titanate coupling agent is greater than 8.75. Compared with Example 6, the ratio of photoinitiator to titanate coupling agent is slightly increased, the scratch resistance of the coating is reduced to 3500 times, and the adhesion of the coating is reduced by one level. This should be because the content of titanate coupling agent is reduced, which causes the adhesion and impact resistance to decrease.

[0074] In the description of this specification, the description with reference to the terms "embodiment", "basic embodiment", "preferred embodiment", "other embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0075] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0076] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A UV curing liquid composition, characterized in that: According to parts by weight, it includes the following components: Acrylate, 20-50 parts; Photoinitiator, 5-10 parts; Titanate coupling agent, 0.5-2.0 parts; Wetting agent, 0.2-1.0 part; Leveling agent, 0.1-0.5 parts; Solvent, 50-80 parts; Wherein, the photoinitiator is acylphosphine oxide.

2. The composition according to claim 1, characterized in that: The photoinitiator is selected from one or more of phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, bisacylphosphine oxide, carbazolylacylphosphine oxide, diphenylphosphine oxide and diarylphosphine oxide.

3. The composition according to claim 2, characterized in that: The titanate coupling agent is selected from one or more of trioleyl isopropyl titanate, triisostearoyl isopropyl titanate, isopropyl tri(dioctyl pyrophosphate) titanate, and tetraisopropyl di(dioctyl phosphite) titanate.

4. The composition according to any one of claims 1 to 3, characterized in that: The ratio of the photoinitiator to the titanate coupling agent is (3.33-8.75):

1.

5. The composition according to claim 1, characterized in that: The acrylate is selected from one or more of epoxy acrylate resin, polyester acrylate resin, vinyl acrylate, bismaleimide acrylate, thermosetting polyimide acrylate, and cyanate acrylate.

6. The composition according to claim 1, characterized in that: The wetting agent is selected from one or more of MOK-5011, MOK-5027 and MOK-5035 produced by Merck KGaA Darmstadt, Germany.

7. The composition according to claim 1, characterized in that: The leveling agent is selected from one or more of MOK-2021, MOK-2024 and MOK-2100 produced by Merck KGaA Darmstadt, Germany.

8. The composition according to claim 1, characterized in that: The solvent is selected from one or more of propylene glycol methyl ether, butyl acetate, isobutyl alcohol, methyl isobutyl ketone and ethyl acetate.

9. A method for preparing a UV curing solution, characterized in that: Use the composition according to any one of claims 1 to 8, and comprising the following steps: (S1): stirring the solvent, acrylate and photoinitiator uniformly; (S2): Add wetting agent and leveling agent and stir evenly; (S3): adding a titanate coupling agent, stirring evenly, filtering and / or degassing to obtain a coating.

10. An oil cup, characterized in that: The surface is coated with a coating formed by the composition according to any one of claims 1 to 8, or a coating formed by a hardening solution prepared by the preparation method according to claim 9.

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