A silicone rubber material for shower heads and its preparation method

Abstract

This invention discloses a silicone rubber material for showerheads and its preparation method, belonging to the field of rubber technology. The silicone rubber material consists of component A and component B; wherein component A includes vinyl silicone oil, a reinforcing agent, vinyltris(2-methoxyethoxy)silane, a stain-resistant and antibacterial filler, and a catalyst; component B includes vinyl silicone oil, a crosslinking agent, and an inhibitor. The silicone rubber material prepared by this invention has excellent antibacterial and stain-resistant properties, and showerhead products made with it have good durability and a significantly extended service life.

Description

Technical Field

[0001] This invention belongs to the field of rubber technology, specifically relating to a silicone rubber material for shower heads and its preparation method. Background Technology

[0002] As a core component of modern bathroom fixtures, the material properties of showerheads directly impact user experience and lifespan. While traditional metal materials are sturdy and durable, they are prone to limescale buildup in hard water environments, affecting water flow uniformity and increasing installation and usage burdens due to their higher density. Engineering plastics are inexpensive and easy to process, but prolonged exposure to humid, hot environments and sunlight can cause them to become brittle and discolored, affecting aesthetics and lifespan. Ordinary rubber is prone to permanent plastic deformation under repeated exposure to high-temperature hot water, leading to seal failure and leaks. Furthermore, small molecules added to rubber materials may release trace amounts of odor, affecting the user experience. Silicone rubber, with its excellent properties, has gradually become one of the ideal materials for manufacturing showerheads and other bathroom components. For example, Chinese patent CN107760040A discloses a silicone rubber and its preparation method, which is made from a masterbatch and additives. The masterbatch includes methyl vinyl silicone rubber raw rubber, hydrophobic fumed silica, hydroxyl silicone oil, vinyl silicone resin, hexamethyldisilazane, and water. The additives include phenyl silicone oil, fluorinated elastomers, and metal oxides of magnesium and aluminum. The silicone rubber prepared by this patent can meet the requirements of bathroom seals for oxidation resistance, acid resistance, and environmental protection.

[0003] Silicone rubber's wide temperature range allows it to withstand the high temperatures of hot showers without softening or deforming, while also maintaining elasticity in low-temperature environments, ensuring reliable operation of the showerhead in all weather conditions. Its stable, inert chemical structure makes it non-toxic and odorless, preventing the release of harmful substances into the water, meeting the stringent requirements of modern families for healthy bathrooms. Its resilience and flexibility lay the foundation for designing soft, easy-to-clean water nozzles; users can easily remove soft limescale by rubbing, improving the convenience of daily maintenance. However, existing conventional silicone rubber materials still have shortcomings when dealing with hard water environments. After molding, the surface replicates the microscopic texture of the mold, forming a rough structure. This makes it easier for mineral ions such as calcium and magnesium in the water to be adsorbed and crystallize heterogeneously, forming stubborn limescale and causing poor water flow. At the same time, the material's high surface friction coefficient increases water resistance, affecting the concentration and force of the water flow. In the long run, it also accelerates surface wear and provides attachment points for bacteria. Therefore, there is an urgent need to develop a silicone rubber material specifically for showerheads, which has low friction and anti-fouling and antibacterial properties, and can improve the performance and durability of showerheads, thereby meeting the market demand for high-performance bathroom products. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a novel formulation of silicone rubber material for shower heads. By adding a stain-resistant and antibacterial filler that is highly compatible with the silicone rubber matrix, the silicone rubber material is not only endowed with excellent antibacterial and stain-resistant properties, but also maintains stable performance after long-term use in a shower environment, significantly improving the performance and durability of the shower head.

[0005] The technical solution adopted in this invention is as follows:

[0006] A silicone rubber material for shower heads, composed of component A and component B;

[0007] Component A includes the following raw materials: vinyl silicone oil, reinforcing agent, vinyltris(2-methoxyethoxy)silane, stain-resistant and antibacterial filler, and catalyst;

[0008] Component B includes the following raw materials: vinyl silicone oil, crosslinking agent, and inhibitor.

[0009] Preferably, the weight ratio of component A to component B is 1-2:1-2.

[0010] Preferably, component A comprises the following raw materials in parts by weight: 60-80 parts vinyl silicone oil, 20-30 parts reinforcing agent, 0.7-1.5 parts vinyltris(2-methoxyethoxy)silane, 5-10 parts stain-resistant and antibacterial filler, and 0.2-0.4 parts catalyst.

[0011] Preferably, component B comprises the following raw materials in parts by weight: 20-40 parts vinyl silicone oil, 5-7 parts crosslinking agent, and 0.1-0.3 parts inhibitor.

[0012] Preferably, the method for preparing the stain-resistant and antibacterial filler is as follows:

[0013] Hydroxypropyl-β-cyclodextrin, dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride, and heptadecafluorodecyltrimethoxysilane were added to an aqueous ethanol solution, heated and stirred, and then γ-aminopropyltriethoxysilane was added and stirred continuously to obtain a cyclodextrin inclusion solution.

[0014] Hollow mesoporous silica was added to an ethanol-water solution and sonicated. Then, cyclodextrin inclusion solution was added, heated and stirred, centrifuged, washed, and dried to obtain a supported carrier.

[0015] The supported carrier was dispersed in an aqueous ethanol solution, and then vinyltriethoxysilane and triethylamine were added. The mixture was heated under reflux, centrifuged, washed, and dried to obtain a stain-resistant and antibacterial filler.

[0016] Preferably, the weight ratio of hydroxypropyl-β-cyclodextrin, dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride, heptadecafluorodecyltrimethoxysilane, and γ-aminopropyltriethoxysilane is 4-6:2-3:1-2:0.2-0.5.

[0017] Preferably, the weight ratio of the hollow mesoporous silica to the cyclodextrin inclusion solution is 5-8:30-50.

[0018] Preferably, the weight ratio of the supported carrier, vinyltriethoxysilane, and triethylamine is 4-6:0.3-0.8:0.3-0.8.

[0019] The antifouling and antibacterial filler prepared in this invention utilizes the unique cavity structure of hydroxypropyl-β-cyclodextrin to selectively include the hydrophobic alkyl chain of dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride and the hydrophobic fluorocarbon chain of heptadecafluorodecyltrimethoxysilane. This process not only improves the dispersibility of both components in the reaction system, but more importantly, it forms an ordered pre-assembled structure, providing preliminary stabilization protection for the functional molecules. Subsequently, with the synergistic effect of the bridging agent γ-aminopropyltriethoxysilane, these functional molecules and the oxysilane at the end of the bridging agent itself hydrolyze in an aqueous environment to generate highly reactive silanol groups. These silanol groups undergo dehydration condensation reactions with the abundant hydroxyl groups on the surface of the hollow mesoporous silica support, forming a strong Si-O-Si covalent bond network. This permanently immobilizes the antibacterial component (quaternary ammonium salt) and the antifouling component (fluorocarbon chain) on the support framework in a chemical anchoring manner, resulting in... The durable and stable functional core (supported carrier) fundamentally avoids the drawbacks of easy migration and loss of physically adsorbed functional additives. Finally, the surface of the above-mentioned supported carrier is modified by vinyltriethoxysilane, successfully introducing highly reactive vinyl functional groups. When the above-mentioned stain-resistant and antibacterial filler is added to the silicone rubber matrix, these surface vinyl groups participate in the hydrosilylation reaction under the action of a catalyst during the curing stage, generating stable Si-C bonds. This allows the stain-resistant and antibacterial filler to be directly embedded into the three-dimensional cross-linked network of silicone rubber through strong chemical bonds, rather than simple physical mixing and filling. This strong interfacial chemical bonding ensures that the filler will not migrate or fall off from the matrix during long-term use, even when faced with continuous rinsing, friction, or deformation of hot water. This allows its antibacterial and stain-resistant effects to be stable and durable, significantly improving the antibacterial and stain-resistant durability and overall reliability of silicone rubber materials for shower heads.

[0020] Preferably, the method for preparing the stain-resistant and antibacterial filler is as follows:

[0021] (1) By weight, add 4-6 parts of hydroxypropyl-β-cyclodextrin, 2-3 parts of dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride, and 1-2 parts of heptadecafluorodecyltrimethoxysilane to 30-50 parts of an aqueous ethanol solution, stir for 1-3 h at 50-60 °C and 100-200 r / min, then add 0.2-0.5 parts of γ-aminopropyltriethoxysilane and continue stirring for 0.5-1.5 h to obtain a cyclodextrin inclusion solution;

[0022] (2) Add 5-8 parts of hollow mesoporous silica to 50-80 parts of ethanol aqueous solution and sonicate for 0.5-1h. Then add 30-50 parts of cyclodextrin inclusion solution and stir for 3-5h at 50-60℃ and 100-200r / min. Centrifuge, wash, and vacuum dry to obtain the supported carrier.

[0023] (3) Disperse 4-6 parts of the supported carrier in 30-50 parts of ethanol aqueous solution, then add 0.3-0.8 parts of vinyltriethoxysilane and 0.03-0.08 parts of triethylamine, reflux at 80-90℃ under nitrogen protection for 10-15h, centrifuge, wash, and vacuum dry to obtain the stain-resistant and antibacterial filler.

[0024] Preferably, the concentration of the ethanol aqueous solution in steps (1) and (2) is 40-50 wt%.

[0025] Preferably, the concentration of the ethanol aqueous solution in step (3) is 80-90 wt%.

[0026] Preferably, the washing method in steps (2) and (3) is as follows: wash with anhydrous ethanol 2-5 times.

[0027] Preferably, the frequency of the ultrasound is 20-30kHz and the power is 200-400W.

[0028] Preferably, the molar degree of substitution of the hydroxypropyl-β-cyclodextrin is 0.4-1.5.

[0029] Preferably, the hollow mesoporous silica has an average particle size of 400-600 nm and a pore size of 2-3 nm.

[0030] Preferably, the reinforcing agent is any one of fumed silica, precipitated silica, or silane-modified silica.

[0031] Preferably, the catalyst is any one of caster catalyst, cis-dichlorobis(triphenylphosphine)platinum, and chloroplatinic acid.

[0032] Preferably, the catalyst is a cassiterite catalyst.

[0033] Preferably, the crosslinking agent is a hydrogen-containing silicone oil.

[0034] Preferably, the inhibitor is any one of 1-ethynylcyclohexanol, 2-propyn-1-ol, 2-methyl-3-butyn-2-ol, 4-tert-butylcyclohexanol, and 3,5-dimethyl-1-hexyn-3-ol.

[0035] Preferably, the inhibitor is 1-ethynylcyclohexanol.

[0036] Preferably, the vinyl silicone oil has a viscosity (25°C) of 7000-12000 mPa·s and a vinyl content of 0.1-0.2 wt%.

[0037] Preferably, the viscosity (25°C) of the hydrogen-containing silicone oil is 20-50 mm. 2 / s, with a hydrogen content of 0.1-0.3wt%.

[0038] The present invention also provides a method for preparing the aforementioned silicone rubber material for shower heads.

[0039] Preferably, the method for preparing the silicone rubber material for the shower head includes the following steps:

[0040] The premixed components A and B are mixed evenly using a mixer, and then pumped into an injection molding machine to cure and form a silicone rubber material for shower heads.

[0041] Preferably, the curing temperature is 150-160℃ and the pressure is 50-80 kg / cm². 2 The duration is 180-420 seconds.

[0042] The beneficial effects of this invention are:

[0043] The silicone rubber material for showerheads prepared by this invention not only possesses excellent antibacterial and stain-resistant properties, but also maintains stable performance even after prolonged use in a shower environment. This invention incorporates a stain-resistant and antibacterial filler, prepared by reacting a supported carrier with vinyltriethoxysilane, into the raw material formulation. This filler exhibits good compatibility with the silicone rubber matrix, enabling it to maintain its antibacterial and stain-resistant effects for a long time, thereby significantly improving the performance and durability of the showerhead and extending its service life. Detailed Implementation

[0044] The present invention will be further described in detail below with reference to specific embodiments, but it should not be construed as limiting the scope of the subject matter of the present invention to the following embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0045] The raw materials used in the examples are described below:

[0046] Vinyl silicone oil, model: RH-Vi1303, viscosity (25℃): 10000±1000mpa·s, vinyl content: 0.12±0.01wt%, Zhejiang Runhe Organosilicon New Material Co., Ltd.

[0047] Fumed silica, model: ZB-8150, Jinan Zhongbei Fine Chemical Co., Ltd.

[0048] Castells catalyst, also known as conventional platinum catalyst, model: PC11, Shanghai Neutron Star Chemical Technology Co., Ltd.

[0049] Hydrogen-containing silicone oil, type: RH-H57, viscosity (25℃): 35±5mm 2 / s, hydrogen content: 0.135±0.005wt%, Zhejiang Runhe Organosilicon New Material Co., Ltd.

[0050] Hydroxypropyl-β-cyclodextrin, CAS: 128446-35-5, degree of molar substitution: 0.69, Shandong Binzhou Zhiyuan Biotechnology Co., Ltd.

[0051] Dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride, CAS: 27668-52-6, content: 60±2wt% (solvent is methanol), Hunan Lijie Biotechnology Group Co., Ltd.

[0052] Heptadecafluorodecyltrimethoxysilane, CAS: 83048-65-1, purity: ≥98%, Quzhou Dongye Chemical Technology Co., Ltd.

[0053] Hollow mesoporous silica, model: HMS-500-3, average particle size: 500nm, pore size: 2-3nm, Nanjing Jicang Nanotechnology Co., Ltd. Example 1

[0054] A silicone rubber material for shower heads, composed of component A and component B in a weight ratio of 1:1;

[0055] Component A is composed of the following raw materials in parts by weight: 70 parts vinyl silicone oil, 25 parts fumed silica, 1 part vinyltris(2-methoxyethoxy)silane, 7 parts stain-resistant and antibacterial filler, and 0.3 parts cassiterite catalyst.

[0056] Component B is composed of the following raw materials in parts by weight: 30 parts vinyl silicone oil, 6 parts hydrogen-containing silicone oil, and 0.2 parts 1-ethynylcyclohexanol.

[0057] The method for preparing the stain-resistant and antibacterial filler is as follows:

[0058] By weight, 5 parts of hydroxypropyl-β-cyclodextrin, 2.5 parts of dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride, and 1.5 parts of heptadecafluorodecyltrimethoxysilane were added to 40 parts of 50wt% aqueous ethanol solution and stirred at 55℃ and 150r / min for 2h. Then, 0.3 parts of γ-aminopropyltriethoxysilane were added and stirring was continued for 1h to obtain a cyclodextrin inclusion solution.

[0059] 6.5 parts of hollow mesoporous silica were added to 60 parts of 50wt% ethanol aqueous solution and sonicated for 0.5 h at an ultrasonic frequency of 25 kHz and a power of 300 W. Then, 40 parts of cyclodextrin inclusion solution were added and stirred for 4 h at 55 ℃ and 150 r / min. After centrifugation, the mixture was washed three times with anhydrous ethanol and vacuum dried to obtain the supported carrier.

[0060] Five parts of the supported carrier were dispersed in 40 parts of 80wt% ethanol aqueous solution, and then 0.5 parts of vinyltriethoxysilane and 0.05 parts of triethylamine were added. The mixture was refluxed at 85℃ under nitrogen protection for 12 hours, centrifuged, washed three times with anhydrous ethanol, and vacuum dried to obtain the stain-resistant and antibacterial filler.

[0061] A method for preparing a silicone rubber material for shower heads includes the following steps:

[0062] Premixed components A and B are mixed thoroughly using a mixer, then pumped into an injection molding machine and cured on a mold to obtain silicone rubber material for shower heads. The curing temperature is 150℃ and the pressure is 70 kg / cm². 2 The duration is 360 seconds. Example 2

[0063] The scheme is basically the same as that in Example 1, except that the raw materials of component A and component B are different by weight. Component A is composed of the following raw materials by weight: 60 parts vinyl silicone oil, 20 parts fumed silica, 0.7 parts vinyltris(2-methoxyethoxy)silane, 5 parts stain-resistant and antibacterial filler, and 0.2 parts cassiterite catalyst.

[0064] Component B is composed of the following raw materials in parts by weight: 20 parts vinyl silicone oil, 5 parts hydrogen-containing silicone oil, and 0.1 parts 1-ethynylcyclohexanol. Example 3

[0065] The scheme is basically the same as that in Example 1, except that the raw materials of component A and component B are different by weight. Component A is composed of the following raw materials by weight: 80 parts vinyl silicone oil, 30 parts fumed silica, 1.5 parts vinyltris(2-methoxyethoxy)silane, 10 parts stain-resistant and antibacterial filler, and 0.4 parts cassiterite catalyst.

[0066] Component B is composed of the following raw materials in parts by weight: 40 parts vinyl silicone oil, 7 parts hydrogen-containing silicone oil, and 0.3 parts 1-ethynylcyclohexanol. Example 4

[0067] The scheme is basically the same as that in Example 1, except that the preparation method of the stain-resistant and antibacterial filler is different.

[0068] The method for preparing the stain-resistant and antibacterial filler is as follows:

[0069] By weight, 2.5 parts of dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride and 1.5 parts of heptadecafluorodecyltrimethoxysilane were added to 40 parts of 50wt% aqueous ethanol solution and stirred at 55℃ and 150r / min for 3h to obtain a mixture.

[0070] 6.5 parts of hollow mesoporous silica were added to 60 parts of 50wt% ethanol aqueous solution and sonicated for 0.5 h at an ultrasonic frequency of 25 kHz and a power of 300 W. Then, 40 parts of the mixture were added and stirred for 4 h at 55 ℃ and 150 r / min. After centrifugation, the mixture was washed three times with anhydrous ethanol and vacuum dried to obtain a stain-resistant and antibacterial filler. Example 5

[0071] The scheme is basically the same as that in Example 1, except that the preparation method of the stain-resistant and antibacterial filler is different.

[0072] The method for preparing the stain-resistant and antibacterial filler is as follows:

[0073] By weight, 5 parts of hydroxypropyl-β-cyclodextrin, 2.5 parts of dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride, and 1.5 parts of heptadecafluorodecyltrimethoxysilane were added to 40 parts of 50wt% aqueous ethanol solution and stirred at 55℃ and 150r / min for 2h. Then, 0.3 parts of γ-aminopropyltriethoxysilane were added and stirring was continued for 1h to obtain a cyclodextrin inclusion solution.

[0074] 6.5 parts of hollow mesoporous silica were added to 60 parts of 50wt% ethanol aqueous solution and sonicated for 0.5 h at an ultrasonic frequency of 25 kHz and a power of 300 W. Then, 40 parts of cyclodextrin inclusion solution were added and stirred for 4 h at 55 ℃ and 150 r / min. After centrifugation, the mixture was washed three times with anhydrous ethanol and vacuum dried to obtain the supported carrier.

[0075] Five parts of the supported carrier were dispersed in 40 parts of 80wt% aqueous ethanol solution, and then 0.5 parts of γ-aminopropyltriethoxysilane and 0.05 parts of triethylamine were added. The mixture was refluxed at 85℃ under nitrogen protection for 12 hours, centrifuged, washed three times with anhydrous ethanol, and vacuum dried to obtain a stain-resistant and antibacterial filler. Example 6

[0076] The scheme is basically the same as that in Example 1, except that the preparation method of the stain-resistant and antibacterial filler is different.

[0077] The method for preparing the stain-resistant and antibacterial filler is as follows:

[0078] By weight, 5 parts of hydroxypropyl-β-cyclodextrin, 2.5 parts of polyhexamethylene biguanide hydrochloride (CAS: 32289-58-0), and 1.5 parts of 1H,1H,2H,2H-perfluorooctanol (CAS: 647-42-7) were added to 40 parts of 50wt% ethanol aqueous solution and stirred at 55℃ and 150r / min for 2h. Then, 0.3 parts of γ-aminopropyltriethoxysilane were added and stirring was continued for 1h to obtain cyclodextrin inclusion solution.

[0079] 6.5 parts of hollow mesoporous silica were added to 60 parts of 50wt% ethanol aqueous solution and sonicated for 0.5 h at an ultrasonic frequency of 25 kHz and a power of 300 W. Then, 40 parts of cyclodextrin inclusion solution were added and stirred for 4 h at 55 ℃ and 150 r / min. After centrifugation, the mixture was washed three times with anhydrous ethanol and vacuum dried to obtain the supported carrier.

[0080] Five parts of the supported carrier were dispersed in 40 parts of 80wt% ethanol aqueous solution, and then 0.5 parts of vinyltriethoxysilane and 0.05 parts of triethylamine were added. The mixture was refluxed at 85℃ under nitrogen protection for 12 hours, centrifuged, washed three times with anhydrous ethanol, and vacuum dried to obtain the stain-resistant and antibacterial filler.

[0081] Test Example 1

[0082] Durability: The silicone rubber materials used for shower heads obtained in the above examples were immersed in water at 75±5℃ for 6 weeks, then removed and air-dried for later use. The antibacterial properties of the silicone rubber materials were determined according to standard GB / T 31402-2023 (test bacteria: Escherichia coli ATCC 8739, Staphylococcus aureus ATCC 6538P). The stain resistance of the silicone rubber materials was determined according to standard GB / T 17657-2022, section 4.44, method 2 (pollutants used: soap solution, nail polish; stain resistance level: 5 is the best, 1 is the worst). Each example was tested in parallel with 5 groups, and the average value was calculated. The test results are shown in Table 1.

[0083] Table 1 Results of stain resistance and antibacterial durability tests on silicone rubber materials

[0084]

[0085] The test results above show that, compared with Examples 4-6, the silicone rubber materials for shower heads prepared in Examples 1-3 have the best stain resistance and antibacterial durability. This is because Examples 1-3 of this invention use specific stain-resistant and antibacterial fillers. These fillers utilize the cavity structure of hydroxypropyl-β-cyclodextrin to selectively include the hydrophobic alkyl chain of dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride and the hydrophobic fluorocarbon chain of heptadecafluorodecyltrimethoxysilane. This not only improves the dispersibility of both in the reaction system but also provides preliminary stabilization protection for the functional molecules. These functional molecules hydrolyze to generate silanol groups, which undergo dehydration condensation with the hydroxyl groups on the surface of the hollow mesoporous silica carrier to form a strong Si-O-Si covalent bond. The bonding network permanently immobilizes the antibacterial components (quaternary ammonium salts) and antifouling components (fluorocarbon chains) onto the carrier skeleton through chemical anchoring, fundamentally avoiding the drawbacks of easy migration and loss caused by physical adsorption. Furthermore, by grafting and modifying the surface of the supported carrier with vinyltriethoxysilane, vinyl functional groups are successfully introduced. During curing, these surface vinyl groups participate in hydrosilylation reactions under the action of a catalyst to generate stable Si-C bonds. This allows the antifouling and antibacterial filler to be embedded into the three-dimensional cross-linked network of silicone rubber through strong chemical bonds, rather than simple physical mixing and filling. This ensures that the filler will not migrate or fall off from the matrix during long-term use, even when subjected to continuous rinsing and friction from hot water, further improving the antibacterial and antifouling durability of the silicone rubber material.

[0086] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A silicone rubber material for shower heads, characterized in that: It is composed of component A and component B; component A includes the following raw materials: vinyl silicone oil, reinforcing agent, vinyltris(2-methoxyethoxy)silane, stain-resistant and antibacterial filler, and catalyst; component B includes the following raw materials: vinyl silicone oil, crosslinking agent, and inhibitor. The method for preparing the stain-resistant and antibacterial filler is as follows: Hydroxypropyl-β-cyclodextrin, dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride, and heptadecafluorodecyltrimethoxysilane were added to an aqueous ethanol solution, heated and stirred, and then γ-aminopropyltriethoxysilane was added and stirred continuously to obtain a cyclodextrin inclusion solution. Hollow mesoporous silica was added to an ethanol-water solution and sonicated, then cyclodextrin inclusion solution was added, heated and stirred, centrifuged, washed and dried to obtain a supported carrier. The supported carrier was dispersed in an aqueous ethanol solution, and then vinyltriethoxysilane and triethylamine were added. The mixture was heated under reflux, centrifuged, washed, and dried to obtain a stain-resistant and antibacterial filler.

2. The silicone rubber material for shower heads as described in claim 1, characterized in that: The weight ratio of hydroxypropyl-β-cyclodextrin, dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride, heptadecafluorodecyltrimethoxysilane, and γ-aminopropyltriethoxysilane is 4-6:2-3:1-2:0.2-0.5; the weight ratio of hollow mesoporous silica and cyclodextrin inclusion solution is 5-8:30-50; and the weight ratio of the supported carrier, vinyltriethoxysilane, and triethylamine is 4-6:0.3-0.8:0.3-0.

8.

3. The silicone rubber material for shower heads as described in claim 1, characterized in that: The raw materials in component A are as follows by weight: 60-80 parts vinyl silicone oil, 20-30 parts reinforcing agent, 0.7-1.5 parts vinyltris(2-methoxyethoxy)silane, 5-10 parts stain-resistant and antibacterial filler, and 0.2-0.4 parts catalyst; the raw materials in component B are as follows by weight: 20-40 parts vinyl silicone oil, 5-7 parts crosslinking agent, and 0.1-0.3 parts inhibitor.

4. The silicone rubber material for shower heads as described in claim 1, characterized in that: The reinforcing agent is any one of fumed silica, precipitated silica, or silane-modified silica.

5. The silicone rubber material for shower heads as described in claim 1, characterized in that: The catalyst is any one of the following: caster catalyst, cis-dichlorobis(triphenylphosphine)platinum, and chloroplatinic acid.

6. The silicone rubber material for shower heads as described in claim 1, characterized in that: The crosslinking agent is hydrogen-containing silicone oil.

7. The silicone rubber material for shower heads as described in claim 1, characterized in that: The inhibitor is any one of 1-ethynylcyclohexanol, 2-propyn-1-ol, 2-methyl-3-butyn-2-ol, and 3,5-dimethyl-1-hexyn-3-ol.

8. The silicone rubber material for shower heads as described in claim 1, characterized in that: The weight ratio of component A to component B is 1-2:1-2.

9. The method for preparing the silicone rubber material for shower heads according to any one of claims 1-8, characterized in that: Includes the following steps: The premixed components A and B are mixed evenly using a mixer, and then pumped into an injection molding machine to cure and form a silicone rubber material for shower heads.

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