Anti-icing coating and preparation method thereof

Abstract

The invention discloses an anti-icing coating and a preparation method thereof, and relates to the technical field of coatings, the anti-icing coating comprises a component A and a component B according to a weight ratio of 100: (43-57), the component A is prepared from the following raw materials in parts by weight: 65 to 75 parts of fluorosilicone resin, 3 to 8 parts of modified natural vegetable wax, 0.2 to 0.6 part of a de-foaming agent, 0.5 to 1 part of a flatting agent and 15 to 25 parts of a solvent; the component B comprises the following raw materials in parts by weight: 5-10 parts of a curing agent and 40-50 parts of a solvent. Fluorosilicone resin containing isobornyl on a side group is used as a film-forming base material, and modified natural vegetable wax obtained by sequentially performing oxygen-enriched microwave plasma treatment and grinding treatment on rice bran wax and castor bean wax in a proper proportion is introduced, so that the anti-icing capability of the anti-icing coating at low temperatures such as-40 DEG C and the like is remarkably improved; and the defects in the prior art are overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, and in particular to an anti-icing coating and a preparation method thereof. Background Art

[0002] In the field of coating technology, anti-icing coatings, as a coating with special functions, are widely used in aviation, electricity, transportation and other fields to prevent ice from forming on the surface of objects, thereby ensuring the normal operation and safety of equipment. However, the performance of existing anti-icing coatings in low temperature environments is not ideal, especially when the temperature drops below -5°C, many anti-icing coatings will completely lose their super-repellent and non-stick effect on liquid water, causing ice to easily form and accumulate on the surface of the coating, seriously affecting its anti-icing performance.

[0003] Traditional anti-icing coatings usually use some conventional resins as film-forming base materials and add some hydrophobic additives to improve the hydrophobicity of the coating. However, these resins are prone to deformation or freezing at low temperatures, which damages the integrity and hydrophobicity of the coating and thus loses its anti-icing effect. At the same time, traditional hydrophobic additives are often not effective at low temperatures and cannot effectively maintain the super-hydrophobicity of the coating.

[0004] In order to improve the performance of anti-icing coatings at low temperatures, researchers have been exploring new film-forming binders and hydrophobic additives. Fluorosilicone resin, as a resin with low surface energy and good hydrophobicity, is widely used in anti-icing coatings. However, the anti-icing performance of pure fluorosilicone resin at low temperatures is limited, and further modification is needed to improve its low-temperature stability.

[0005] In addition, natural plant wax, as an environmentally friendly and renewable resource, has good hydrophobicity and smoothness and is gradually being used in the field of coatings. However, natural plant wax, without treatment, has poor compatibility and dispersibility with resins, making it difficult to exert the best hydrophobic effect in coatings.

[0006] Therefore, there is an urgent need for a new type of anti-icing coating and a preparation method thereof to solve the problem that the existing anti-icing coating easily loses its super-phobic and non-stick effect at low temperatures. Summary of the invention

[0007] In order to solve the above problems, the present invention provides an anti-icing coating and a preparation method thereof.

[0008] In a first aspect, the present invention provides an anti-icing coating, the anti-icing coating comprising component A and component B in a weight ratio of 100:(43-57);

[0009] In parts by weight, the component A includes the following raw materials: 65-75 parts of fluorosilicone resin, 3-8 parts of modified natural plant wax, 0.2-0.6 parts of defoamer, 0.5-1 parts of leveling agent and 15-25 parts of solvent;

[0010] In parts by weight, the B component includes the following raw materials: 5 to 10 parts of a curing agent and 40 to 50 parts of a solvent;

[0011] The side groups of the molecular chains of the fluorosilicone resin contain isobornyl groups;

[0012] The modified natural plant wax is obtained by sequentially subjecting rice bran wax and castor bean wax in a weight ratio of (17-25):(3-8) to oxygen-enriched microwave plasma treatment and grinding treatment.

[0013] Furthermore, the weight ratio of the component A to the component B is 100:53.

[0014] Furthermore, the component A includes the following raw materials in parts by weight: 70 parts of fluorosilicone resin, 5 parts of modified natural plant wax, 0.4 parts of defoaming agent, 0.7 parts of leveling agent and 20 parts of solvent.

[0015] Furthermore, in parts by weight, the B component includes the following raw materials: 8 parts of a curing agent and 45 parts of a solvent.

[0016] Furthermore, the preparation method of the fluorosilicone resin includes the following process:

[0017] Dissolving n-butyl methacrylate, isobornyl methacrylate, perfluorooctyl propyl acrylate and vinyl triethoxysilane in a mixed solvent of methyl isobutyl ketone and m-xylene, adding 1-2 wt % of dibenzoyl peroxide based on the total weight of n-butyl methacrylate, isobornyl methacrylate, perfluorooctyl propyl acrylate and vinyl triethoxysilane, and polymerizing at 125-135° C. for 7-10 hours; after the reaction is completed, the mixed solvent is removed by spin drying to obtain a fluorine-containing polymer;

[0018] The fluorine-containing polymer is dissolved in octafluoropentanol, and then tetraisopropoxysilane and water are added and stirred and mixed at a temperature of 38 to 45° C. for 7 to 10 hours, and then cooled to room temperature to obtain the fluorosilicone resin;

[0019] Wherein, the weight ratio of the n-butyl methacrylate, the isobornyl methacrylate, the perfluorooctylpropyl acrylate, the vinyl triethoxysilane and the mixed solvent is (1.9-2.1):(0.9-1.1):(0.9-1.1):(0.9-1.1):(11-13);

[0020] The weight ratio of the fluorine-containing polymer, the octafluoropentanol, the tetraisopropoxysilane and the water is (8-12):(8-12):(1-1.5):(0.2-0.6);

[0021] The weight ratio of the methyl isobutyl ketone to the meta-xylene is 1:(1-3).

[0022] Furthermore, the preparation method of the modified natural plant wax comprises the following process:

[0023] The rice bran wax and the castor bean wax are mixed and placed in a microwave plasma treatment instrument, oxygen and argon with a volume ratio of 7:1 are introduced as working media, and glow discharge treatment is performed for 2 to 5 minutes under the conditions of microwave power of 300 to 450 W and air intake of 60 to 85 mL / min, and oxygen is continuously introduced for 10 to 15 minutes to obtain a first natural plant wax mixture;

[0024] The first natural plant wax mixture is ground at a rotation speed of 800 to 1000 rpm for 10 to 20 minutes to obtain the modified natural plant wax.

[0025] Furthermore, the weight ratio of the rice bran wax to the castor bean wax is 21:5.

[0026] Furthermore, the defoamer includes BYK-1789, the leveling agent includes at least one of BYK-392 and BYK-394, the solvent is composed of acetone and xylene in a volume ratio of (1-2):(1-3), and the curing agent includes at least one of diphenylmethane diisocyanate and toluene diisocyanate.

[0027] In a second aspect, the present invention provides a method for preparing the anti-icing coating according to any one of the first aspects, such as Figure 1 As shown, the preparation method comprises the following steps:

[0028] Stirring and mixing the raw materials in component A to obtain component A;

[0029] The raw materials in component B are stirred and mixed to obtain the component B.

[0030] The above technical solution provided by the embodiment of the present invention has at least the following advantages compared with the prior art:

[0031] The embodiment of the present invention provides an anti-icing coating and a preparation method thereof. The present invention uses a fluorosilicone resin containing isobornyl groups in the side groups as a film-forming base material and introduces a modified natural plant wax obtained by sequentially treating rice bran wax and castor bean wax with oxygen-enriched microwave plasma and grinding in an appropriate proportion, thereby significantly improving the anti-icing ability of the anti-icing coating at low temperatures such as -40°C, thereby making up for the deficiencies of the prior art. Specifically:

[0032] 1. Selection of film-forming base material

[0033] Fluorosilicone resin itself has a low surface energy, which is the basis for its good hydrophobicity. The introduction of a cycloalkyl group with a specific structure - isobornyl in the molecular chain of fluorosilicone resin, its non-polar properties help to reduce the interaction between molecules, making the resin surface smoother and the contact angle of water droplets on the surface larger, thereby further improving the superhydrophobic effect. More importantly, the introduction of isobornyl side groups enhances the rigidity of the molecular chain of fluorosilicone resin, making it less likely to deform or freeze at low temperatures, and can effectively maintain the integrity and superhydrophobicity of the coating.

[0034] 2. Introduction of modified natural plant wax

[0035] Rice bran wax and castor bean wax are both natural plant waxes. Through oxygen-enriched microwave plasma treatment and grinding treatment, not only can the two waxes be mixed and refined in an appropriate proportion, but also their surface properties can be improved, and their compatibility and dispersibility with fluorosilicone resin can be enhanced. They can be filled between fluorosilicone resin molecules to form a denser coating, which can enhance the flexibility of the fluorosilicone resin coating and further improve the superhydrophobic properties, preventing the coating from losing its superhydrophobicity due to brittle fracture or cracks at low temperatures.

[0036] In summary, the present invention significantly improves the anti-icing ability of the anti-icing coating at low temperatures by selecting a fluorosilicone resin with specific side groups as the base material, introducing specially treated modified natural plant wax and reasonably proportioning component A and component B, and effectively avoids the problem that the existing anti-icing coating completely loses its super-phobic and non-stick property to liquid water when the temperature reaches below -5°C. The present invention has broad application prospects, especially in fields where ice formation needs to be prevented, such as aviation, electricity, transportation, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0039] Figure 1 A schematic flow chart of a method for preparing an anti-icing coating provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0042] In a first aspect, the present invention provides an anti-icing coating, the anti-icing coating comprising component A and component B in a weight ratio of 100:(43-57);

[0043] In parts by weight, the component A includes the following raw materials: 65-75 parts of fluorosilicone resin, 3-8 parts of modified natural plant wax, 0.2-0.6 parts of defoamer, 0.5-1 parts of leveling agent and 15-25 parts of solvent;

[0044] In parts by weight, the B component includes the following raw materials: 5 to 10 parts of a curing agent and 40 to 50 parts of a solvent;

[0045] The side groups of the molecular chains of the fluorosilicone resin contain isobornyl groups;

[0046] The modified natural plant wax is obtained by sequentially subjecting rice bran wax and castor bean wax in a weight ratio of (17-25):(3-8) to oxygen-enriched microwave plasma treatment and grinding treatment.

[0047] The embodiments of the present application provide an anti-icing coating. The present invention uses a fluorosilicone resin containing isoborneol groups in the side groups as a film-forming base material and introduces modified natural plant wax obtained by treating rice bran wax and castor bean wax in appropriate proportions with oxygen-rich microwave plasma and grinding in sequence, thereby significantly improving the anti-icing ability of the anti-icing coating at low temperatures such as -40°C, thereby making up for the shortcomings of the prior art.

[0048] In some specific embodiments, the weight ratio of the A component to the B component is 100:53.

[0049] In some specific embodiments, the component A includes the following raw materials, measured in parts by weight: 70 parts of fluorosilicone resin, 5 parts of modified natural plant wax, 0.4 parts of defoaming agent, 0.7 parts of leveling agent and 20 parts of solvent.

[0050] In some specific embodiments, the B component includes the following raw materials, measured in parts by weight: 8 parts of a curing agent and 45 parts of a solvent.

[0051] In some specific embodiments, the preparation method of the fluorosilicone resin includes the following process:

[0052] Dissolving n-butyl methacrylate, isobornyl methacrylate, perfluorooctyl propyl acrylate and vinyl triethoxysilane in a mixed solvent of methyl isobutyl ketone and m-xylene, adding 1-2 wt % of dibenzoyl peroxide based on the total weight of n-butyl methacrylate, isobornyl methacrylate, perfluorooctyl propyl acrylate and vinyl triethoxysilane, and polymerizing at 125-135° C. for 7-10 hours; after the reaction is completed, the mixed solvent is removed by spin drying to obtain a fluorine-containing polymer;

[0053] The fluorine-containing polymer is dissolved in octafluoropentanol, and then tetraisopropoxysilane and water are added and stirred and mixed at a temperature of 38 to 45° C. for 7 to 10 hours, and then cooled to room temperature to obtain the fluorosilicone resin;

[0054] Wherein, the weight ratio of the n-butyl methacrylate, the isobornyl methacrylate, the perfluorooctylpropyl acrylate, the vinyl triethoxysilane and the mixed solvent is (1.9-2.1):(0.9-1.1):(0.9-1.1):(0.9-1.1):(11-13);

[0055] The weight ratio of the fluorine-containing polymer, the octafluoropentanol, the tetraisopropoxysilane and the water is (8-12):(8-12):(1-1.5):(0.2-0.6);

[0056] The weight ratio of the methyl isobutyl ketone to the meta-xylene is 1:(1-3).

[0057] Preferably, the preparation method of the fluorosilicone resin comprises the following process:

[0058] Dissolving n-butyl methacrylate, isobornyl methacrylate, perfluorooctyl propyl acrylate and vinyl triethoxysilane in a mixed solvent of methyl isobutyl ketone and m-xylene, adding dibenzoyl peroxide accounting for 1.5 wt % of the total weight of the n-butyl methacrylate, isobornyl methacrylate, perfluorooctyl propyl acrylate and vinyl triethoxysilane, and polymerizing at 130° C. for 8 hours; after the reaction is completed, the mixed solvent is removed by spin drying to obtain a fluorine-containing polymer;

[0059] The fluorine-containing polymer is dissolved in octafluoropentanol, and then tetraisopropoxysilane and water are added and stirred and mixed at 40° C. for 8 hours, and then cooled to room temperature to obtain the fluorosilicone resin;

[0060] Wherein, the weight ratio of the n-butyl methacrylate, the isobornyl methacrylate, the perfluorooctylpropyl acrylate, the vinyl triethoxysilane and the mixed solvent is 2:1:1:1:12;

[0061] The weight ratio of the fluorine-containing polymer, the octafluoropentanol, the tetraisopropoxysilane and the water is 10:10:1.4:0.4;

[0062] The weight ratio of the methyl isobutyl ketone to the meta-xylene is 1:2.

[0063] In some specific embodiments, the method for preparing the modified natural plant wax comprises the following process:

[0064] The rice bran wax and the castor bean wax are mixed and placed in a microwave plasma treatment instrument, oxygen and argon with a volume ratio of 7:1 are introduced as working media, and glow discharge treatment is performed for 2 to 5 minutes under the conditions of microwave power of 300 to 450 W and air intake of 60 to 85 mL / min, and oxygen is continuously introduced for 10 to 15 minutes to obtain a first natural plant wax mixture;

[0065] The first natural plant wax mixture is ground at a rotation speed of 800 to 1000 rpm for 10 to 20 minutes to obtain the modified natural plant wax.

[0066] Preferably, the preparation method of the modified natural plant wax comprises the following process:

[0067] The rice bran wax and the castor bean wax are mixed and placed in a microwave plasma treatment instrument, oxygen and argon with a volume ratio of 7:1 are introduced as working medium, and glow discharge treatment is performed for 3 minutes under the conditions of microwave power of 370 W and air intake of 75 mL / min, and oxygen is continuously introduced for 12 minutes to obtain a first natural plant wax mixture;

[0068] The first natural plant wax mixture was ground at a rotation speed of 900 rpm for 15 minutes to obtain the modified natural plant wax.

[0069] In some specific embodiments, the weight ratio of the rice bran wax to the castor bean wax is 21:5.

[0070] In some specific embodiments, the defoamer includes BYK-1789, the leveling agent includes at least one of BYK-392 and BYK-394, the solvent is composed of acetone and xylene in a volume ratio of (1-2):(1-3), and the curing agent includes at least one of diphenylmethane diisocyanate and toluene diisocyanate.

[0071] In a second aspect, the present invention provides a method for preparing the anti-icing coating according to any one of the first aspects, such as Figure 1 As shown, the preparation method comprises the following steps:

[0072] Stirring and mixing the raw materials in component A to obtain component A;

[0073] The raw materials in component B are stirred and mixed to obtain the component B.

[0074] The preparation method of the anti-icing coating provided by the present invention is simple to operate, does not require additional specific equipment, and is suitable for industrial mass production.

[0075] It should be noted that the components and raw materials involved in the anti-icing coating and the preparation method thereof provided in the embodiments of the present invention, unless otherwise specified or specified, can be directly commercially available products or homemade using existing public preparation methods; at the same time, the steps and parameters involved, unless otherwise specified or specified, can be carried out in accordance with the preparation process disclosed in the prior art or directly using existing equipment with reference to the instructions for use, and the present invention document will not repeat them one by one.

[0076] The present invention will be further described below in conjunction with specific examples. It should be understood that these examples are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. The experimental methods in the following examples that do not specify specific conditions are usually measured according to national standards. If there is no corresponding national standard, then the conditions recommended by the manufacturer are followed.

[0077] Example 1

[0078] This example provides an anti-icing coating, the anti-icing coating comprising component A and component B in a weight ratio of 100:53;

[0079] In parts by weight, the component A includes the following raw materials: 70 parts of fluorosilicone resin, 5 parts of modified natural plant wax, 0.4 parts of defoamer, 0.7 parts of leveling agent and 20 parts of solvent;

[0080] In parts by weight, the B component includes the following raw materials: 8 parts of curing agent and 45 parts of solvent;

[0081] The side groups of the molecular chain of the fluorosilicone resin contain isobornyl groups, and the preparation method of the fluorosilicone resin comprises the following steps:

[0082] Dissolving n-butyl methacrylate, isobornyl methacrylate, perfluorooctyl propyl acrylate and vinyl triethoxysilane in a mixed solvent of methyl isobutyl ketone and m-xylene, adding dibenzoyl peroxide accounting for 1.5 wt % of the total weight of the n-butyl methacrylate, isobornyl methacrylate, perfluorooctyl propyl acrylate and vinyl triethoxysilane, and polymerizing at 130° C. for 8 hours; after the reaction is completed, the mixed solvent is removed by spin drying to obtain a fluorine-containing polymer;

[0083] The fluorine-containing polymer is dissolved in octafluoropentanol, and then tetraisopropoxysilane and water are added and stirred and mixed at 40° C. for 8 hours, and then cooled to room temperature to obtain the fluorosilicone resin;

[0084] Wherein, the weight ratio of the n-butyl methacrylate, the isobornyl methacrylate, the perfluorooctylpropyl acrylate, the vinyl triethoxysilane and the mixed solvent is 2:1:1:1:12; the weight ratio of the fluorine-containing polymer, the octafluoropentanol, the tetraisopropoxysilane and the water is 10:10:1.4:0.4; the weight ratio of the methyl isobutyl ketone and the m-xylene is 1:2;

[0085] The modified natural plant wax is obtained by sequentially subjecting rice bran wax and castor bean wax in a weight ratio of 21:5 to oxygen-enriched microwave plasma treatment and grinding treatment. The preparation method of the modified natural plant wax comprises the following steps:

[0086] The rice bran wax and the castor bean wax are mixed and placed in a microwave plasma treatment instrument, oxygen and argon with a volume ratio of 7:1 are introduced as working medium, and glow discharge treatment is performed for 3 minutes under the conditions of microwave power of 370 W and air intake of 75 mL / min, and oxygen is continuously introduced for 12 minutes to obtain a first natural plant wax mixture;

[0087] Grinding the first natural plant wax mixture at a rotation speed of 900 rpm for 15 minutes to obtain the modified natural plant wax;

[0088] The defoamer is BYK-1789, the leveling agent is BYK-392, the solvent is composed of acetone and xylene in a volume ratio of 1:2, and the curing agent is toluene diisocyanate.

[0089] The preparation method of the above-mentioned anti-icing coating comprises the following steps:

[0090] Stirring and mixing the raw materials in component A to obtain component A;

[0091] The raw materials in component B are stirred and mixed to obtain the component B.

[0092] When in use, the anti-icing coating formed by evenly mixing component A and component B is directly sprayed on the substrate to be treated with anti-icing, and then dried at 40°C.

[0093] Example 2

[0094] This example provides an anti-icing coating, the anti-icing coating comprising component A and component B in a weight ratio of 100:43;

[0095] In parts by weight, the component A includes the following raw materials: 65 parts of fluorosilicone resin, 3 parts of modified natural plant wax, 0.2 parts of defoamer, 0.5 parts of leveling agent and 15 parts of solvent;

[0096] In parts by weight, the B component includes the following raw materials: 5 parts of curing agent and 40 parts of solvent;

[0097] The side group of the molecular chain of the fluorosilicone resin contains an isobornyl group, and the preparation method of the fluorosilicone resin is the same as that of Example 1;

[0098] The modified natural plant wax is obtained by sequentially subjecting rice bran wax and castor bean wax in a weight ratio of 17:3 to oxygen-enriched microwave plasma treatment and grinding treatment. The preparation method of the modified natural plant wax comprises the following steps:

[0099] The rice bran wax and the castor bean wax are mixed and placed in a microwave plasma treatment instrument, oxygen and argon with a volume ratio of 7:1 are introduced as working medium, and glow discharge treatment is performed for 5 minutes under the conditions of microwave power of 300 W and air intake of 60 mL / min, and oxygen is continuously introduced for 10 minutes to obtain a first natural plant wax mixture;

[0100] Grinding the first natural plant wax mixture at a rotation speed of 800 rpm for 20 minutes to obtain the modified natural plant wax;

[0101] The defoamer is BYK-1789, the leveling agent is BYK-394, the solvent is composed of acetone and xylene in a volume ratio of 1:3, and the curing agent is diphenylmethane diisocyanate.

[0102] The preparation method and use method of the above anti-icing coating are the same as those in Example 1.

[0103] Example 3

[0104] This example provides an anti-icing coating, the anti-icing coating comprising component A and component B in a weight ratio of 100:57;

[0105] In parts by weight, the component A includes the following raw materials: 75 parts of fluorosilicone resin, 8 parts of modified natural plant wax, 0.6 parts of defoamer, 1 part of leveling agent and 25 parts of solvent;

[0106] In parts by weight, the B component includes the following raw materials: 10 parts of curing agent and 50 parts of solvent;

[0107] The side group of the molecular chain of the fluorosilicone resin contains an isobornyl group, and the preparation method of the fluorosilicone resin is the same as that of Example 1;

[0108] The modified natural plant wax is obtained by sequentially subjecting rice bran wax and castor bean wax in a weight ratio of 25:8 to oxygen-enriched microwave plasma treatment and grinding treatment. The preparation method of the modified natural plant wax comprises the following steps:

[0109] The rice bran wax and the castor bean wax are mixed and placed in a microwave plasma treatment instrument, oxygen and argon with a volume ratio of 7:1 are introduced as working medium, and glow discharge treatment is performed for 5 minutes under the conditions of microwave power of 450 W and air intake of 85 mL / min, and oxygen is continuously introduced for 10 minutes to obtain a first natural plant wax mixture;

[0110] Grinding the first natural plant wax mixture at a rotation speed of 1000 rpm for 15 minutes to obtain the modified natural plant wax;

[0111] The defoamer is BYK-1789, the leveling agent is BYK-394, the solvent is composed of acetone and xylene in a volume ratio of 1:3, and the curing agent is diphenylmethane diisocyanate.

[0112] The preparation method and use method of the above anti-icing coating are the same as those in Example 1.

[0113] Comparative Example 1

[0114] This example provides an anti-icing coating and a preparation method and a use method thereof. The only difference from Example 1 is that: a fluorosilicone resin without isobornyl disclosed in the prior art is used, and its preparation method includes the following process: 58 parts of monomers including chlorotrifluoroethylene, 29 parts of cyclohexyl vinyl ether, 5 parts of hydroxybutyl vinyl ether, 15 parts of polymethylvinylsiloxane, and 2 parts of dodecenoic acid are put into 200 parts of solvent butyl acetate, 2.5 parts of potassium persulfate are added, the temperature is raised to 70°C, and after reacting for 12 hours until the autoclave pressure no longer decreases, the temperature and pressure are lowered to normal temperature and pressure to obtain the fluorosilicone resin; the remaining steps and parameters are the same.

[0115] Comparative Example 2

[0116] This example provides an anti-icing coating and a preparation method and a use method thereof, which differs from Example 1 only in that rice bran wax is replaced with sugarcane wax; the remaining steps and parameters are the same.

[0117] Comparative Example 3

[0118] This example provides an anti-icing coating and a preparation method and a use method thereof. The only difference from Example 1 is that the modified natural plant wax is obtained by grinding rice bran wax and castor bean wax in a weight ratio of 21:5 (i.e., no oxygen-enriched microwave plasma treatment is performed); the remaining steps and parameters are the same.

[0119] Test Case

[0120] In this example, the performance data of the coating formed by the anti-icing coating obtained in the above-mentioned Examples 1 to 3 and Comparative Examples 1 to 3 are tested according to the testing method disclosed in the prior art.

[0121] 1) Static water contact angle test (hanging drop method): Deionized water is used as the test liquid, and a static water contact angle tester is used to measure the static water contact angle (unit: °) of the coating.

[0122] 2) Ice adhesion strength test (pull-off method): At -40°C and 85RH%, the ice adhesion strength test was performed after freezing for 24 hours to obtain the ice adhesion strength (unit: kPa).

[0123] The test results are shown in Table 1.

[0124] Table 1

[0125] Test samples Static water contact angle (°) Ice adhesion strength (kPa) Example 1 148 13.6 Example 2 129 16.8 Example 3 135 15.1 Comparative Example 1 107 38.9 Comparative Example 2 120 35.7 Comparative Example 3 113 49.3

[0126] It can be seen from Table 1 that compared with Comparative Examples 1 to 3, the anti-icing coating provided by the embodiment of the present invention has a larger static water contact angle and a lower ice adhesion viscosity at -40°C, indicating that it can still maintain excellent anti-icing ability at low temperatures such as -40°C.

[0127] In summary, the embodiments of the present invention provide an anti-icing coating and a preparation method thereof. The present invention uses a fluorosilicone resin containing isoborneol groups in the side groups as a film-forming base material and introduces modified natural plant wax obtained by treating rice bran wax and castor bean wax in appropriate proportions with oxygen-rich microwave plasma and grinding in sequence, thereby significantly improving the anti-icing ability of the anti-icing coating at low temperatures such as -40°C, thereby making up for the shortcomings of the prior art.

[0128] Various embodiments of the present invention may be presented in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity, and should not be understood as a rigid limitation on the scope of the present invention; therefore, the range description should be considered to have specifically disclosed all possible sub-ranges and single numerical values ​​within the range. For example, the range description from 1 to 6 should be considered to have specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which apply regardless of the range. In addition, whenever a numerical range is indicated herein, it is meant to include any cited number (fractional or integer) within the indicated range.

[0129] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An anti-icing coating, characterized in that: The anti-icing coating comprises component A and component B in a weight ratio of 100:(43-57); In parts by weight, the component A includes the following raw materials: 65-75 parts of fluorosilicone resin, 3-8 parts of modified natural plant wax, 0.2-0.6 parts of defoamer, 0.5-1 parts of leveling agent and 15-25 parts of solvent; In parts by weight, the B component includes the following raw materials: 5 to 10 parts of a curing agent and 40 to 50 parts of a solvent; The side groups of the molecular chains of the fluorosilicone resin contain isobornyl groups; The modified natural plant wax is obtained by sequentially subjecting rice bran wax and castor bean wax in a weight ratio of (17-25):(3-8) to oxygen-enriched microwave plasma treatment and grinding treatment.

2. The anti-icing coating according to claim 1, characterized in that: The weight ratio of the A component to the B component is 100:

53.

3. The anti-icing coating according to claim 1, characterized in that: In parts by weight, the component A includes the following raw materials: 70 parts of fluorosilicone resin, 5 parts of modified natural plant wax, 0.4 parts of defoaming agent, 0.7 parts of leveling agent and 20 parts of solvent.

4. The anti-icing coating according to claim 1, characterized in that: In parts by weight, the B component includes the following raw materials: 8 parts of a curing agent and 45 parts of a solvent.

5. The anti-icing coating according to claim 1, characterized in that: The preparation method of the fluorosilicone resin comprises the following steps: Dissolving n-butyl methacrylate, isobornyl methacrylate, perfluorooctyl propyl acrylate and vinyl triethoxysilane in a mixed solvent of methyl isobutyl ketone and m-xylene, adding 1-2 wt % of dibenzoyl peroxide based on the total weight of n-butyl methacrylate, isobornyl methacrylate, perfluorooctyl propyl acrylate and vinyl triethoxysilane, and polymerizing at 125-135° C. for 7-10 hours; after the reaction is completed, the mixed solvent is removed by spin drying to obtain a fluorine-containing polymer; The fluorine-containing polymer is dissolved in octafluoropentanol, and then tetraisopropoxysilane and water are added and stirred and mixed at a temperature of 38 to 45° C. for 7 to 10 hours, and then cooled to room temperature to obtain the fluorosilicone resin; Wherein, the weight ratio of the n-butyl methacrylate, the isobornyl methacrylate, the perfluorooctylpropyl acrylate, the vinyl triethoxysilane and the mixed solvent is (1.9-2.1):(0.9-1.1):(0.9-1.1):(0.9-1.1):(11-13); The weight ratio of the fluorine-containing polymer, the octafluoropentanol, the tetraisopropoxysilane and the water is (8-12):(8-12):(1-1.5):(0.2-0.6); The weight ratio of the methyl isobutyl ketone to the meta-xylene is 1:(1-3).

6. The anti-icing coating according to claim 1, characterized in that: The preparation method of the modified natural plant wax comprises the following process: The rice bran wax and the castor bean wax are mixed and placed in a microwave plasma treatment instrument, oxygen and argon with a volume ratio of 7:1 are introduced as working media, and glow discharge treatment is performed for 2 to 5 minutes under the conditions of microwave power of 300 to 450 W and air intake of 60 to 85 mL / min, and oxygen is continuously introduced for 10 to 15 minutes to obtain a first natural plant wax mixture; The first natural plant wax mixture is ground at a rotation speed of 800 to 1000 rpm for 10 to 20 minutes to obtain the modified natural plant wax.

7. The anti-icing coating according to claim 6, characterized in that: The weight ratio of the rice bran wax to the castor bean wax is 21:

5.

8. The anti-icing coating according to claim 1, characterized in that: The defoamer includes BYK-1789, the leveling agent includes at least one of BYK-392 and BYK-394, the solvent is composed of acetone and xylene in a volume ratio of (1-2):(1-3), and the curing agent includes at least one of diphenylmethane diisocyanate and toluene diisocyanate.

9. A method for preparing an anti-icing coating according to any one of claims 1 to 8, characterized in that: The preparation method comprises the following steps: Stirring and mixing the raw materials in component A to obtain component A; The raw materials in component B are stirred and mixed to obtain the component B.

Images