Super-hard easy-to-clean hardened coating as well as preparation method and use method of super-hard easy-to-clean hardened coating

Abstract

The invention relates to a superhard easy-to-clean hardened coating which is prepared from the following components in parts by weight: 20 to 50 parts of acrylic ester, 20 to 40 parts of hydroxy ketone compound, 5 to 10 parts of acylphosphine oxide, 0.5 to 1.0 part of antifouling additive, 0.2 to 1.0 part of wetting agent, 0.1 to 0.5 part of flatting agent and 50 to 80 parts of solvent. The oil cup has superhard performance and easy-to-clean performance, and the problems that the oil cup is not easy to clean and the surface of the oil cup is easy to scratch are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of PC material cleaning, and in particular to a superhard, easy-to-clean hardened coating, a preparation method and a use method thereof. 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 containing oil smoke to be discharged from the kitchen through the exhaust duct, which can reduce the choking smell in the kitchen. In addition, the exhaust of oil smoke through the range hood can reduce the oil smoke inhaled by the human body.

[0003] When the range hood is in use, the negative pressure generated by the high-speed rotation of the impeller will carry away the generated oil smoke. However, the filter and inner cavity of the range hood will store a large amount of grease, which will eventually flow into the oil collector - the oil cup. When the old oil in the oil cup accumulates to a certain amount, it must be removed for cleaning.

[0004] However, the old oil at the bottom of the oil cup will condense into relatively stubborn sediment, which requires a very strong alkaline detergent to clean, which is time-consuming and labor-intensive, and the alkaline detergent can also cause certain damage to human skin.

[0005] Currently, resin oil cups are still widely used in the industry. Many of them are made of PC material with very low surface hardness.

[0006] Therefore, a superhard, easy-to-clean hard coating is badly needed. Summary of the Invention

[0007] On one hand, the present invention provides a superhard, easy-to-clean, hardened coating that allows the oil cup to be both superhard and easy to clean, solving the problems of the oil cup being difficult to clean and easily scratched. On the other hand, the present invention provides a method for preparing the superhard, easy-to-clean, hardened coating and a method for using the coating.

[0008] The first aspect of the present invention provides a superhard, easy-to-clean, hardened coating, which comprises the following components in parts by weight:

[0009]

[0010] The superhard, easy-to-clean, hardened coating preferably comprises the following components, calculated in parts by weight:

[0011]

[0012] The superhard, easy-to-clean, hardened coating preferably comprises the following components, calculated in parts by weight:

[0013]

[0014]

[0015] In the ultra-hard, easy-to-clean hardened coating, preferably, the acrylic resin is one or more of epoxy resin, polyester resin, vinyl ester, bismaleimide, thermosetting polyimide and cyanate ester.

[0016] In the ultra-hard, easy-to-clean hardened coating, preferably, the hydroxyketone compound is one or more of hexahydroxyketone, pentahydroxyketone, tetrahydroxyketone, trihydroxyketone and dihydroxyacetone.

[0017] In the ultra-hard, easy-to-clean hardened coating, preferably, the acylphosphine oxide is one or more of phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, bisacylphosphine oxide, carbazolylacylphosphine oxide, diphenylphosphine oxide and diarylphosphine oxide.

[0018] In the ultra-hard, easy-to-clean hardened coating, preferably, the solvent is one or more of propylene glycol methyl ether, butyl acetate, isobutyl alcohol, methyl isobutyl ketone and ethyl acetate.

[0019] A second aspect of the present invention provides a method for preparing a superhard, easy-to-clean, hardened coating, comprising the following steps:

[0020] Under stirring, adding acrylic resin, hydroxyketone compound and acylphosphine oxide to the solvent and stirring evenly to obtain a first mixed solution;

[0021] adding a wetting agent and a leveling agent to the first mixed liquid, stirring and dispersing the mixture to obtain a second mixed liquid;

[0022] Add antifouling additive to the second mixed liquid, stir and disperse, filter or vacuum degas, and obtain super-hard and easy-to-clean hardened coating.

[0023] In the preparation method of the superhard, easy-to-clean, hardened coating, preferably, the stirring time for stirring and dispersing after adding the wetting agent and the leveling agent to the first mixed liquid is 15-20 minutes and the stirring speed is 400-600 rpm.

[0024] In the method for preparing the superhard, easy-to-clean, hardened coating, preferably, the stirring time for stirring and dispersing the second mixed liquid after adding the antifouling agent is 5-10 minutes and the stirring speed is 400-600 rpm.

[0025] The third aspect of the present invention provides a method for using a superhard, easy-to-clean hardened coating, comprising the following steps:

[0026] Step 1: Spray the super-hard and easy-to-clean hard coating on the PC material;

[0027] UV curing film formation completes the processing of PC material.

[0028] The beneficial effects are:

[0029] The present invention uses acylphosphine oxide as a photoinitiator, which has greater absorption in the ultraviolet light region and the visible light region. After photolysis, it generates free radicals with high initiation activity, which can initiate curing more effectively than other photoinitiators.

[0030] Acylphosphine oxide photoinitiator hardly turns yellow after curing and under long-term light radiation, has a bleaching effect on light, and the rays can penetrate the coating, so the thick film can be thoroughly cured.

[0031] Hydroxyketone compounds have active chemical properties and can widely participate in reactions such as polymerization and condensation. They can react with acrylic resins to produce heterocyclic compounds, increase cross-linking density, and improve the surface hardness of the film.

[0032] The combination of the raw materials of the present invention can achieve a combination of high hardness and high adhesion, while having good easy cleaning properties. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention are described clearly and completely below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0034] 1. Formula of super hard and easy to clean hard coating

[0035] A superhard, easy-to-clean, hardened coating comprising the following components in parts by weight:

[0036]

[0037] The acrylic resin is one or more of epoxy resin, polyester resin, vinyl ester, bismaleimide, thermosetting polyimide and cyanate ester, and is preferably used in an amount of 25-45 parts, more preferably 30-40 parts.

[0038] The hydroxyketone compound is one or more of hexahydroxyketone, pentahydroxyketone, tetrahydroxyketone, trihydroxyketone and dihydroxyacetone, and the dosage is preferably 15-35 parts, more preferably 20-30 parts.

[0039] The acylphosphine oxide is one or more of phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, bisacylphosphine oxide, carbazolylacylphosphine oxide, diphenylphosphine oxide and diarylphosphine oxide, and the amount used is preferably 6-9 parts, more preferably 7-8 parts.

[0040] The antifouling agent is one or more of KY1203 produced by Shin-Etsu Japan or DAC-HP produced by Daikin Japan, and the dosage is preferably 0.6-1.0 parts, more preferably 0.8-1.0 parts.

[0041] The wetting agent is one or more of MOK-5011, MOK-5027 and MOK-5035 produced by Merck, Germany. The dosage is preferably 0.6-1.0 parts, more preferably 0.7-0.8 parts.

[0042] Wherein, the leveling agent is one or more of MOK-2021, MOK-2024 and MOK-2100 produced by Merck, Germany.

[0043] The solvent is one or more of propylene glycol methyl ether, butyl acetate, isobutyl alcohol, methyl isobutyl ketone and ethyl acetate, and the amount used is preferably 55-80 parts, more preferably 60-75 parts.

[0044] 2. Preparation Method

[0045] A method for preparing a superhard, easy-to-clean hardened coating comprises the following steps:

[0046] S1: Adding acrylic resin, hydroxyketone compound and acylphosphine oxide into the solvent under stirring, stirring evenly to obtain a first mixed solution.

[0047] S2: adding a wetting agent and a leveling agent to the first mixed solution obtained in step S1, stirring and dispersing the mixture to obtain a second mixed solution.

[0048] The stirring and dispersing time is 15-20 minutes, and the stirring speed is 400-600 rpm.

[0049] S3: adding an antifouling agent to the second mixed liquid obtained in step S2, stirring and dispersing, filtering or vacuum degassing to obtain a super-hard, easy-to-clean hardened coating.

[0050] The stirring and dispersion time is 5-10 minutes, the stirring speed is 400-600 rpm, and the filtration is performed through a 200-mesh filter.

[0051] 3. Usage

[0052] A method for using a superhard, easy-to-clean hardened coating comprises the following steps:

[0053] S1: Spray the super-hard and easy-to-clean hard coating on the PC material.

[0054] Among them, the spraying method includes:

[0055] S11: Use a spray gun to spray. The spraying conditions are: 0.2-0.6 MPA, 23℃±2℃, 55±5%RH.

[0056] S12: Flow and stand. The flow and stand conditions are: 23℃±2℃, stand for 2-3 minutes.

[0057] S13: Heating. Heating conditions: 70°C, 5 min.

[0058] S2: UV curing the sprayed PC material to form a film, completing the treatment of the PC material. The UV curing conditions are: 500-700 MJ / M, time 10-15 seconds.

[0059] 4. Comparative Test

[0060] 1. Preparation Examples 1-4 and Experimental Groups 1-2

[0061] (1) The types and weight proportions of the raw materials of Examples 1-4 are shown in Table 1:

[0062] Table 1 Types and weight percentages of raw materials in Examples 1-4

[0063] raw material Example 1 Example 2 Example 3 Example 4 acrylic resin 30 40 20 50 Hydroxyketone compounds 20 30 25 35 Acylphosphine oxide 7 8 5 10 Antifouling agents 0.8 1.0 0.5 1.0 Wetting agent 0.7 0.8 0.2 1.0 Leveling agent 0.5 0.1 0.2 0.4 solvent 60 75 50 80

[0064] (2) Experimental groups 1-2 were sprayed with common hard coatings on the market, such as the JS-8131 model from Dongguan Haidi New Materials and the VH-74 model from Changshu Dun Optics.

[0065] The stirring speed in Example 1 and Example 2 was 600 rpm, the stirring speed in Example 3 was 500 rpm, and the stirring speed in Example 4 was 400 rpm.

[0066] 2. Experimental verification

[0067] The ultra-hard, easy-to-clean hard coatings prepared in Examples 1-4 were sprayed onto transparent PC (cleaned, degreased, and static-free with isopropyl alcohol). After UV curing, the film properties were measured. The curing conditions are shown in Table 2, and the film properties are shown in Table 3. Sample panels were prepared using the same process using a commercially available hardening solution, and the film properties are shown in Table 3.

[0068] Table 2 Curing conditions

[0069]

[0070]

[0071] Table 3 Performance test results

[0072]

[0073] As can be seen from Table 3, the superhard and easy-to-clean hardened coatings prepared in Examples 1-4 of the present invention use acylphosphine oxide as a photoinitiator to generate free radicals with high initiation activity; the hydroxyketone compound has active chemical properties and can widely participate in reactions such as polymerization and condensation to produce heterocyclic compounds, increase the crosslinking density, and achieve high hardness. Compared with ordinary commercially available hardening liquids, they have excellent high hardness and high adhesion effects, and also have superhard and easy-to-clean properties that ordinary hardening liquids do not have. The oil cup has both superhard properties and easy-to-clean properties, solving the problems of the oil cup being difficult to clean and the surface being easily scratched.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A superhard, easy-to-clean hardened coating, characterized in that: Calculated by weight, it includes the following components:

2. The superhard, easy-to-clean, hardened coating according to claim 1, characterized in that: Calculated by weight, it includes the following components:

3. The superhard, easy-to-clean, hardened coating according to claim 2, characterized in that: Calculated by weight, it includes the following components:

4. The superhard, easy-to-clean hardened coating according to claim 3, characterized in that: The acrylic resin is one or more of epoxy resin, polyester resin, vinyl ester, bismaleimide, thermosetting polyimide and cyanate ester.

5. The superhard, easy-to-clean, hardened coating according to claim 4, characterized in that: The hydroxyketone compound is one or more of hexahydroxyketone, pentahydroxyketone, tetrahydroxyketone, trihydroxyketone and dihydroxyacetone.

6. The superhard, easy-to-clean, hardened coating according to claim 5, characterized in that: The acylphosphine oxide is one or more of phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, bisacylphosphine oxide, carbazolylacylphosphine oxide, diphenylphosphine oxide and diarylphosphine oxide.

7. The superhard, easy-to-clean, hardened coating according to claim 6, characterized in that: The solvent is one or more of propylene glycol methyl ether, butyl acetate, isobutyl alcohol, methyl isobutyl ketone and ethyl acetate.

8. A method for preparing the superhard, easy-to-clean, hardened coating according to any one of claims 1 to 7, characterized in that: The steps include: Under stirring, adding acrylic resin, hydroxyketone compound and acylphosphine oxide to the solvent and stirring evenly to obtain a first mixed solution; adding a wetting agent and a leveling agent to the first mixed liquid, stirring and dispersing the mixture to obtain a second mixed liquid; Add antifouling additive to the second mixed liquid, stir and disperse, filter or vacuum degas, and obtain super-hard and easy-to-clean hardened coating.

9. The method for preparing the superhard, easy-to-clean hardened coating according to claim 8, characterized in that: The stirring time for the wetting agent and the leveling agent added to the first mixed liquid and then dispersed is 15-20 minutes and the stirring speed is 400-600 rpm; the stirring time for the antifouling agent added to the second mixed liquid and then dispersed is 5-10 minutes and the stirring speed is 400-600 rpm.

10. A method for using a superhard, easy-to-clean hardened coating, characterized in that: The steps include: Spraying the superhard, easy-to-clean, hardened coating according to any one of claims 1 to 7 onto the PC material; UV curing film formation completes the processing of PC material.

Images