A water and oil repellent fluorosilicone polymer, its preparation method and application in electric fire-fighting equipment

Abstract

This invention discloses a water- and oil-repellent fluorosilicone polymer, its preparation method, and its application in power fire-fighting equipment. The polymer has the following general chemical formula: where R is selected from any one of C1 to C18 alkyl groups, R1 is hydrogen or methyl, m is selected from any integer from 1 to 5, and n is selected from any integer from 5 to 20. The polymer is prepared by polymerizing octavinylhalosesiloxane with an acrylate monomer and a fluorinated unsaturated monomer. The water- and oil-repellent fluorosilicone polymer prepared by this invention exhibits excellent water and oil repellency and high-temperature resistance, meeting the requirements of power fire-fighting equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluorosilicon polymers, in particular to a water and oil repellent fluorosilicon polymer, a preparation method thereof and application thereof in electric power fire-fighting equipment. BACKGROUND

[0002] Polyhedral oligomeric silsesquioxane (POSS) is a high-performance organic-inorganic hybrid material with excellent heat resistance, flame retardancy and reactivity, and has a wide range of applications. As a halogen-free flame retardant, POSS has been applied in many composite materials. For example, POSS was used as a flame retardant to prepare a nanocomposite with flame retardant properties by adding it to polyurethane, and the nanocomposite was applied as a coating to polyester and cotton textiles, and the results showed that the danger of the textiles in a fire was significantly reduced. In addition, the addition of 10% Al-POSS to polypropylene (PP) reduced the heat release rate of PP by 43%. Furthermore, DOPO-POSS was used as a flame retardant to introduce it into polycarbonate (PC) materials, and when the content of DOPO-POSS was 4%, the LOI value of the composite material was 30.5%, and the UL-94 rating was V-0.

[0003] At present, fluorine-containing unsaturated monomers are widely used to prepare low-surface-energy coatings to achieve water and oil repellency on the surface, and fluorine modification of POSS (oligomeric silsesquioxane) groups can significantly enhance the hydrophobicity of the material. For example, blending of a POSS-based compound with fluorine modification with polymethyl methacrylate (PMMA) or polyethyl methacrylate (PEMA) can significantly enhance the hydrophobicity and oleophobicity of the coating film. Also for example, the hydrophobicity of a POSS-terminated poly(3-hexanolactone) epoxy resin with fluorine modification is also significantly enhanced. Therefore, the POSS-based compounds (polymers) modified by fluorine-containing unsaturated monomers have excellent water and oil repellency, and can be used to prepare low-surface-energy coatings to achieve water and oil repellency on the surface.

[0004] Combining the inherent properties of POSS (oligomeric silsesquioxane) (low density, rich porosity, stable physicochemical properties and thermal stability), in theory, POSS is fully equipped with good thermal insulation and flame retardant performance, which are two key factors for designing and constructing refractory materials. Octavinyl POSS is a monomer that crosslinks with unsaturated olefins to form a POSS-based porous polymer with excellent refractory performance, but there have been no reports on its self-cleaning performance. So far, there have been no reports on the combination of thermal insulation or flame retardant performance with self-cleaning. While there are reports on the application of POSS-modified fluorine-containing polyether substances in low-surface-energy coatings, which can be used to construct water-repellent and oil-repellent surfaces, for example, the Chinese patent application document with publication number CN111690103A discloses a water-repellent and oil-repellent fluorine-containing silicon copolymer and its preparation method and application, which polymerizes octavinyl hemisiloxane with acrylate monomers and fluorine-containing unsaturated monomers to obtain a fluorine-containing silicon copolymer containing short fluorine chains and being degradable, which has no potential harm to human health and the environment, but its temperature resistance still has a lot of room for improvement, the main reason being that the fluorine-containing ether bond is unstable and prone to breakage at high temperatures. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a water-repellent and oil-repellent fluorine-silicon polymer with excellent water and oil repellency, self-cleaning properties and excellent high-temperature resistance, which can meet the use requirements of electric power fire-fighting equipment.

[0006] The present application solves the above technical problems by the following technical means:

[0007] A water-repellent and oil-repellent fluorine-silicon polymer is a polymer with the following general chemical structure:

[0008]

[0009] wherein R is selected from any one of C1-C18 alkyl, R1 is hydrogen or methyl, m is selected from any integer from 1 to 5, and n is selected from any integer from 5 to 20.

[0010] Beneficial effects: the water and oil repellent fluorosilicon polymer provided by the application adopts perfluoro straight chain C6 carbon chain unsaturated monomer to replace perfluoro ether chain unsaturated monomer for polymerization reaction, the fluorosilicon polymer obtained exhibits lower surface free energy at a relatively high use concentration, and the temperature resistance is greatly improved, can be applied to the outer surface of the fireproof box body or fireproof cover of electrical fire-fighting equipment, improves the high temperature resistance of the electrical fire-fighting equipment, ensures that the electrical components in the box body will not fail quickly in a fire environment, the coating formed does not have the problems of agglomeration of inorganic ions and weak two-phase interface bonding force, to a certain extent, inhibits heat mass transfer, and due to the introduction of the POSS polymer with excellent temperature resistance, through reasonable design and simple polymerization reaction, a fluorosilicon polymer with excellent hydrophobic and oleophobic properties is created, which can be applied to the preparation of low surface energy coating, the hydrophobic and oleophobic properties can prevent the surface of the box body from icing in cold regions, facilitate the maintenance of maintenance personnel, and ensure the safety of the equipment.

[0011] Preferably, R is any one of methyl, ethyl, butyl, hexyl and octyl.

[0012] Preferably, the water and oil repellent fluorosilicon polymer has a weight average molecular weight of 0.93*10 5 ~2.64*10 5 .

[0013] Preferably, the water and oil repellent fluorosilicon polymer has a chemical structure as shown in the following formula:

[0014]

[0015] The application further provides a preparation method of the water and oil repellent fluorosilicon copolymer, which comprises polymerizing octavinylhemisiloxane, an acrylic ester monomer represented by and a fluorine-containing unsaturated monomer represented by The reaction formula is as shown in the following formula:

[0016]

[0017] Preferably, when the fluorosilicon polymer is a polymer having a chemical structure as shown in the following formula: the preparation method of the water and oil repellent fluorosilicon polymer is that octavinylhemisiloxane is polymerized with methyl methacrylate monomer and a fluorine-containing unsaturated monomer represented by The reaction formula is as shown in the following formula:

[0018]

[0019] Preferably, the preparation method of the water and oil repellent fluorosilicon polymer is that octavinylhemisiloxane is first polymerized with a fluorine-containing unsaturated monomer represented by an acrylic ester monomer represented by Formula 1 to obtain a polymer intermediate, and then polymerizing the polymer intermediate with a fluorine-containing unsaturated monomer represented by Formula 2.

[0020] Preferably, the acrylic ester monomer represented by Formula 1 is any one of methyl methacrylate (R is methyl, R1 is methyl), ethyl methacrylate (R is methyl, R1 is ethyl), butyl methacrylate (R is methyl, R1 is butyl), hexyl methacrylate (R is methyl, R1 is hexyl), isooctyl methacrylate (R is methyl, R1 is isooctyl), methyl acrylate (R is hydrogen, R1 is methyl), ethyl acrylate (R is hydrogen, R1 is ethyl), butyl acrylate (R is hydrogen, R1 is butyl), hexyl acrylate (R is hydrogen, R1 is hexyl), isooctyl acrylate (R is hydrogen, R1 is isooctyl).

[0021] Preferably, the polymerization reaction is performed in an organic solvent in the presence of an initiator, and the temperature of the polymerization reaction is 100-300°C.

[0022] Preferably, the polymerization reaction is performed in an inert gas atmosphere.

[0023] Preferably, the inert gas is nitrogen or argon.

[0024] Preferably, the initiator is at least one of an azo compound, an alkyl peroxide; and the organic solvent is at least one of an aromatic hydrocarbon, an aliphatic hydrocarbon, an alicyclic hydrocarbon, an ether, an ester, a ketone, dimethyl sulfoxide, dimethyl formamide, dimethyl acetamide.

[0025] Preferably, the azo compound is one of azobisisobutyronitrile, 1-tert-amylazo-1-cyanocyclohexane, 1-tert-butylazo-1-cyanocyclohexane.

[0026] Preferably, the alkyl peroxide is one of di-tert-butyl peroxide, tert-butyl peroxybenzoate, tert-butyl peroxyformate, tert-butyl peroxyisooctoate, tert-butyl peroxy-2-ethylhexanoate, benzoyl peroxide.

[0027] Preferably, the organic solvent is one or a mixture of more than one of n-hexane, n-heptane, cyclohexane, benzene, toluene, xylene, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, ethyl acetate, butyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, dimethyl sulfoxide, dimethyl formamide, trichloroethane, trifluorotoluene, perfluoro-n-butyl methyl ether, tetrahydrofuran, methyl nonafluorobutyl ether.

[0028] ​​Preferably, the organic solvent is one or a mixture of ethyl acetate, butyl acetate, toluene, methyl ethyl ketone, methyl isobutyl ketone, and methyl nonafluorobutyl ether.

[0029] Preferably, the fluorosilicone copolymer is prepared by first reacting octavinylhaloxysiloxane, denoted as […], in an organic solvent. Acrylic ester monomers are polymerized with an initiator at 100–300°C to obtain a mixture containing polymer intermediates; then, an initiator is added to the mixture containing polymer intermediates. The fluorinated unsaturated monomer and initiator are polymerized at 100-300°C to obtain the water- and oil-repellent fluorosilicone polymer.

[0030] Preferably, when octavinyl-half-siloxane polymerizes with acrylate monomers, the molar amount of the initiator added is 0.1% to 5% of the molar amount of the acrylate monomers; when the polymer intermediate polymerizes with fluorinated unsaturated monomers, the molar amount of the initiator added is 0.1% to 5% of the molar amount of the fluorinated unsaturated monomers, the molar ratio of octavinyl-half-siloxane to acrylate monomers is 1:1 to 10, and the molar ratio of octavinyl-half-siloxane to fluorinated acrylate monomers is 1:0.5 to 5.

[0031] Preferably, after the polymer intermediate reacts with the fluorinated unsaturated monomer, the mixture is filtered, the filter cake is washed with a mixed solvent of methanol and chloroform, and then dried to obtain the water- and oil-repellent fluorosilicone polymer.

[0032] Preferably, in the above structural formula All indicate

[0033] The present invention also proposes the application of the water- and oil-repellent fluorosilicone polymer in electrical fire protection equipment.

[0034] The advantages of this invention are:

[0035] The water- and oil-repellent fluorosilicone polymer coating provided by this invention avoids the problems of inorganic ion aggregation and weak interphase bonding, thus inhibiting heat and mass transfer to a certain extent. It also exhibits excellent water and oil repellency, making it suitable for preparing low surface energy coatings. Furthermore, the preparation method of this invention is simple to operate, uses readily available raw materials, is low in cost, requires no special equipment or complex post-processing, is safe and environmentally friendly, has low energy consumption, and is easy to scale up for production. Attached Figure Description

[0036] Figure 1 The water contact angles on cotton fabrics of coatings made of different polymers prepared in Example 1 and Comparative Example 1 of the present invention are shown.

[0037] Figure 2The n-hexadecane contact angle of the coatings of different polymers prepared in Example 1 and Comparative Example 1 of the present invention on cotton fabric;

[0038] Figure 3 DTG curves of different polymers prepared in Example 1 and Comparative Example 1 of this invention;

[0039] Figure 4 The 1H NMR spectrum of the water- and oil-repellent fluorosilicone polymer R2 prepared in Example 1 is shown. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Unless otherwise specified, all test materials and reagents used in the following examples are commercially available.

[0042] Unless otherwise specified in the embodiments, the techniques or conditions described in the literature in this field or in accordance with the product manual may be followed.

[0043] Example 1

[0044] A water- and oil-repellent fluorosilicone polymer The preparation method includes the following steps: under argon protection, octavinyl semisiloxane and methyl methacrylate are dissolved in perfluoro-n-butyl methyl ether, AIBN is added, and then the mixture is stirred at 150°C for 24 hours to obtain a mixture containing polymer intermediates; then, under argon protection, a fluorinated unsaturated monomer is added to the mixture containing polymer intermediates. The mixture was stirred and reacted with AIBN at 150°C for 24 hours. The reaction was then stopped, filtered, and the filter cake was washed with CHCl3 / CH3OH (volume ratio 1 / 30) solution and dried to obtain a white powder solid, which is the water- and oil-repellent fluorosilicone polymer.

[0045] In this embodiment, when methyl methacrylate was added, the molar ratio of methyl methacrylate to octavinyl hemisiloxane was 10:1, 5:1, and 1:1, respectively, and the molar amount of AIBN added was 0.1% of the molar amount of methyl methacrylate. When fluorinated unsaturated monomers were added, the molar ratio of the fluorinated unsaturated monomers to the initially added octavinyl hemisiloxane was 5:1, 2.5:1, and 0.5:1, respectively, and the molar amount of AIBN added was 0.1% of the molar amount of the fluorinated unsaturated monomers. The resulting fluorosilicone polymers were named R2, R3, and R4, respectively, with m being 3, 2, and 1, n being 10, 9, and 6, and molecular weights being 2.21 × 10⁻⁶, respectively. 5 1.93×10 5 1.64×10 5 The yields were 78.3%, 80.9%, and 82.4%, respectively. The 1H NMR spectrum of R2 is as follows: Figure 4 As shown, the hydrogen shift of vinyl groups in the polymer is assigned to 6.20 ppm. a is assigned to vinyl groups in unreacted POSS, b is assigned to H on the methoxy group on MMA (3.8 ppm), c is assigned to H on the methylene group (1.76-2.47 ppm), and d is assigned to H on the methyl group of methacrylate (0.82-1.50 ppm).

[0046] Comparative Example 1

[0047] A water- and oil-repellent fluoropolymer The preparation method includes the following steps: under argon protection, methyl methacrylate is dissolved in perfluorobutyl methyl ether, AIBN is added, and then the mixture is stirred at 150°C for 24 hours to obtain a mixture containing polymer intermediates; then, under argon protection, the fluorinated unsaturated monomer and AIBN from Example 1 are added to the mixture containing polymer intermediates, and the mixture is stirred at 150°C for another 24 hours to complete the reaction, filter, wash the filter cake with CH3OH solution, and dry to obtain a white powder solid, which is polymer R1.

[0048] R1 is a polymer without the addition of octavinyl-2 / 3 siloxane and with a molar ratio of methyl methacrylate to fluorinated unsaturated monomers of 2:1. The polymer's weight-average molecular weight is 1.52 × 10⁻⁶. 5 In its structural formula, m = 2 and n = 9.

[0049] Example 2

[0050] A water- and oil-repellent fluorosilicone polymer The preparation method includes the following steps: under argon protection, octavinyl semisiloxane and butyl methacrylate are dissolved in methyl nonafluorobutyl ether, AIBN is added, and then the mixture is stirred at 100°C for 24 hours to obtain a mixture containing polymer intermediates; then, under argon protection, a fluorinated unsaturated monomer is added to the mixture containing polymer intermediates. The mixture was stirred and reacted with AIBN at 100°C for 24 hours. The reaction was then stopped and the mixture was filtered. The filter cake was washed with CH3OH solution and dried to obtain a white powder solid, which is the water- and oil-repellent fluorosilicone polymer, with a yield of 70.9%.

[0051] In this embodiment, when butyl methacrylate was added, the molar ratio of butyl methacrylate to octavinyl hemisiloxane was 1:1, and the molar amount of AIBN added was 0.1% of the molar amount of butyl methacrylate. When fluorinated unsaturated monomers were added, the molar ratio of the fluorinated unsaturated monomers to the initially added octavinyl hemisiloxane was 5:1, and the molar amount of AIBN added was 0.1% of the molar amount of the fluorinated unsaturated monomers. The resulting water- and oil-repellent fluorosilicone polymer was named polymer R5. The weight-average molecular weight of the polymer was 1.12 × 10⁻⁶. 5 In the polymer structural formula, m = 3 and n = 10.

[0052] Example 3

[0053] A water- and oil-repellent fluorosilicone polymer The preparation method includes the following steps: under argon protection, octavinyl semisiloxane and methyl acrylate are dissolved in toluene, AIBN is added, and then the mixture is stirred at 120°C for 24 hours to obtain a mixture containing polymer intermediates; then, under argon protection, a fluorinated unsaturated monomer is added to the mixture containing polymer intermediates. The mixture was stirred at 120°C for 48 hours with benzoyl peroxide. The reaction was then stopped, filtered, and the filter cake was washed with CHCl3 / CH3OH (volume ratio 1 / 30) solution and dried to obtain a white powder solid, which is the water- and oil-repellent fluorosilicone polymer R6, with a yield of 78.9%.

[0054] In this embodiment, when methyl acrylate is added, the molar ratio of methyl acrylate to octavinyl-6-siloxane is 1:1, and the molar amount of AIBN added is 0.1% of the molar amount of methyl acrylate; when fluorinated unsaturated monomers are added, the molar ratio of the fluorinated unsaturated monomers to the initially added octavinyl-6-siloxane is 2:1, and the molar amount of benzoyl peroxide added is 0.1% of the molar amount of the fluorinated unsaturated monomers. The weight-average molecular weight of the polymer is 2.12 × 10⁻⁶. 5 In the polymer structural formula, m = 2 and n = 10.

[0055] Example 4

[0056] A water- and oil-repellent fluorosilicone polymer The preparation method includes the following steps: under argon protection, octavinyl semisiloxane and octadecyl methacrylate are dissolved in xylene, AIBN is added, and then the mixture is stirred at 160°C for 36 hours to obtain a mixture containing polymer intermediates; then, under argon protection, a fluorinated unsaturated monomer is added to the mixture containing polymer intermediates. The mixture was stirred and reacted with AIBN at 160°C for 36 hours. The reaction was then stopped, filtered, and the filter cake was washed with CH3OH solution and dried to obtain a white powder solid, which is the water- and oil-repellent fluorosilicone polymer R7, with a yield of 76.9%.

[0057] In this embodiment, when octadecyl methacrylate is added, the molar ratio of octadecyl methacrylate to octavinyl hemisiloxane is 1:1, and the molar amount of AIBN added is 0.1% of the molar amount of octadecyl methacrylate. When fluorinated unsaturated monomers are added, the molar ratio of the fluorinated unsaturated monomers to the initially added octavinyl hemisiloxane is 4:5, and the molar amount of AIBN added is 0.1% of the molar amount of the fluorinated unsaturated monomers. The weight-average molecular weight of the polymer is 2.49 × 10⁻⁶. 5 In the polymer structural formula, m = 1 and n = 10.

[0058] Comparative Example 2

[0059] Fluorinated copolymers The preparation method includes the following steps: under argon protection, octavinyl semisiloxane and methyl methacrylate are dissolved in dimethylformamide, benzoyl peroxide is added, and then the mixture is stirred at 200°C for 24 hours to obtain a mixture containing polymer intermediates; then, under argon protection, perfluorobutyl fluorinated unsaturated monomers are added to the mixture containing polymer intermediates. The mixture was stirred at 200°C for 24 hours with benzoyl peroxide. The reaction was then stopped, filtered, and the filter cake was washed with CH3OH solution and dried to obtain a white powder solid, which was the fluorinated copolymer R8, with a yield of 50.9%.

[0060] In this comparative example, when methyl methacrylate was added, the molar ratio of methyl methacrylate to octavinyl hemisiloxane was 1:1, and the molar amount of benzoyl peroxide added was 0.1% of the molar amount of methyl methacrylate. When perfluorobutyl fluorinated unsaturated monomer was added, the molar ratio of the fluorinated unsaturated monomer to the initially added octavinyl hemisiloxane was 4:5, and the molar amount of benzoyl peroxide added was 0.1% of the molar amount of the fluorinated unsaturated monomer. The weight-average molecular weight of the copolymer was 2.42 × 10⁻⁶. 5 In the copolymer structural formula, m = 3 and n = 10.

[0061] Comparative Example 3

[0062] Fluorosilicone copolymer P2 is published in Chinese patent application document CN111690103A.

[0063] Polymer water and oil repellency test

[0064] The water and oil repellency of the polymers obtained in the examples and comparative examples were tested using the following methods:

[0065] The obtained polymer was prepared into a 6% (w / w) coating solution with methyl nonafluorobutyl ether. A rinsed cotton fabric (8cm × 8cm) was immersed in the coating solution and left for 1 hour. It was then removed and dried at 80℃ for 1 hour, followed by baking at 200℃ for 5 minutes. After cooling at room temperature, the contact angles of the membrane with water and n-hexadecane were measured. Each solution was measured three times, and the average value was taken. Test conditions: liquid volume 3 μL, height 0.5 cm, magnification 7x. The test results are shown in Table 1.

[0066] Table 1 Performance test data of polymers

[0067] Sample Water contact angle (°) n-Hexadecane contact angle (°) Decomposition temperature (°C) R1 128 109 253 R2 151 123 268 R3 152 120 272 R4 151 115 279 R5 152 111 275 R6 151 110 272 R7 142 103 268 R8 132 101 266 P2 151 120 201

[0068] As shown in Table 1, the coating film formed by the fluorosilicone copolymer provided by this invention exhibits a contact angle of up to 152° with water and a contact angle of up to 123° with n-hexadecane. This indicates that the fluorosilicone copolymer of this invention possesses excellent water and oil repellency properties. Compared with existing technologies, it achieves comparable water and oil repellency even with lower fluorine content. Figure 3 The DTG curves show that the weight loss in the first stage decreases significantly with increasing POSS content. When POSS reaches a certain content, it can significantly reduce the weight loss rate in the first weight loss stage and inhibit the thermal decomposition in the first weight loss stage. This indicates that the introduction of POSS structural units into the fluorinated methacrylate polymer gives the polymer higher thermal stability. In addition, the introduction of linear perfluorohexyl groups also improves thermal stability to a certain extent compared with the perfluorohexyl branched groups in existing literature. The polymer in this application has a better decomposition temperature than the perfluorohexyl branched fluorinated polymer (Comparative Example 3) at 201°C. Therefore, the linear perfluorohexyl series fluorinated copolymers of this invention can be used as the main body of coatings to prepare low surface energy heat-resistant coatings.

[0069] Figure 1 The water contact angles of the coatings of different polymers prepared in Example 1 and Comparative Example 1 on cotton fabrics are given by [the relevant data]. Figure 1 It can be seen that excellent hydrophobic properties are maintained on the surface of cotton fabrics;

[0070] Figure 2 The contact angle of hexadecane on cotton fabric is given by coatings of different polymers prepared in Example 1 and Comparative Example 1 of this invention. Figure 2It can be seen that it maintains excellent oleophobic properties on the surface of cotton fabrics;

[0071] Figure 3 The DTG curves of different polymers prepared in Example 1 and Comparative Example 1 of this invention are shown. Figure 3 It is evident that the polymer of this application possesses superior thermal stability.

[0072] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water- and oil-repellent fluorosilicone polymer, characterized in that: It is a polymer with the following general chemical structural formula: Wherein, R is selected from C1 alkyl, R1 is methyl, m is selected from any integer from 2 to 3, and n is selected from any integer from 9 to 10; the wavy line in the structural formula represents .

2. The water- and oil-repellent fluorosilicone polymer according to claim 1, characterized in that: Its weight-average molecular weight is 0.93 × 10⁻⁶. 5 ~2.64×10 5 .

3. A method for preparing a water- and oil-repellent fluorosilicone copolymer as described in any one of claims 1-2, characterized in that, Including octavinylsilsesquioxane and denoted as acrylate monomers and represented as The fluorinated unsaturated monomers undergo a polymerization reaction, and the general reaction formula is shown below: 。 4. The method for preparing the water- and oil-repellent fluorosilicone polymer according to claim 3, characterized in that: It is to first combine octavinylsilsesquioxane with what is represented as The acrylate monomers are polymerized to obtain polymer intermediates, which are then reacted with acrylate monomers to obtain polymer intermediates. The fluorinated unsaturated monomers undergo a polymerization reaction.

5. The method for preparing the water- and oil-repellent fluorosilicone polymer according to claim 3 or 4, characterized in that: The polymerization reaction is carried out in an organic solvent in the presence of an initiator at a temperature of 100-300°C.

6. The method for preparing the water- and oil-repellent fluorosilicone polymer according to claim 5, characterized in that: The initiator is at least one of azo compounds and alkyl peroxides; the organic solvent is at least one of aromatic hydrocarbons, aliphatic hydrocarbons, ethers, esters, ketones, dimethyl sulfoxide, dimethylformamide, and dimethylacetamide.

7. The method for preparing the water- and oil-repellent fluorosilicone polymer according to claim 4, characterized in that: When octavinylsilsesquioxane polymerizes with acrylate monomers, the molar amount of the initiator added is 0.1% to 5% of the molar amount of the acrylate monomers; when polymer intermediates polymerize with fluorinated unsaturated monomers, the molar amount of the initiator added is 0.1% to 5% of the molar amount of the fluorinated unsaturated monomers, the molar ratio of octavinylsilsesquioxane to acrylate monomers is 1:1 to 10, and the molar ratio of octavinylsilsesquioxane to fluorinated unsaturated monomers is 1:0.5 to 5.

8. The application of a water- and oil-repellent fluorosilicone polymer as described in any one of claims 1-2 in electrical fire-fighting equipment.

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