A long-lasting antimicrobial composition for hard surfaces and methods of use and application thereof
The antibacterial composition, which forms a dense coating on a hard surface, utilizes photodynamic molecules to generate singlet oxygen to achieve long-lasting antibacterial effects, solving the problems of short-lasting antibacterial effects and safety in existing technologies. It is suitable for dry hard surfaces and does not affect routine cleaning operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI BAIMAO
- Filing Date
- 2024-04-15
- Publication Date
- 2026-07-21
AI Technical Summary
In existing technologies, common disinfectants are difficult to achieve long-lasting antibacterial effects on hard surfaces, and there is a risk of damage to the skin and hard surfaces. They also require specific light and water conditions or introduce leaching problems caused by metal ions.
An antibacterial composition is made by combining a polymer precursor with a polymer substrate molecule. It is fixed to a hard surface by chemical bonds to form a dense coating. The antibacterial effect is achieved by photodynamic molecules generating singlet oxygen under light conditions without consuming themselves. The coating can last for more than a year without external damage.
It achieves an antibacterial effect on dry, hard surfaces for more than a year without affecting regular cleaning and disinfection operations, avoiding damage to the skin and surfaces, and does not require a water environment or the introduction of metal ions.
Smart Images
Figure QLYQS_1 
Figure QLYQS_2 
Figure QLYQS_3
Abstract
Description
Technical Field
[0001] This application relates to the field of disinfection and sterilization technology, and more specifically, it relates to a long-lasting antibacterial composition for hard surfaces and its application and method of use. Background Technology
[0002] In recent years, the demand for antibacterial treatments on frequently touched surfaces in public places has been increasing, such as elevator buttons, door handles, light switches, conference room tables, and handrails on public transportation. These surfaces are very easy for bacteria and viruses to spread, posing a risk to people's health. Although these public places have professional cleaning staff who regularly disinfect them, the results are minimal.
[0003] The periodic disinfection techniques commonly used in related technologies generally employ chlorine-based, alcohol-based, and phenolic disinfectants, which can only achieve instantaneous disinfection and lack long-term effectiveness. As for quaternary ammonium salts and metal ion disinfectants, although their effects can be extended to some extent through formulation adjustments and polymer-assisted deposition, they can only achieve effects of 24h, 48h, 72h, etc., and are easily detached by external forces. Therefore, some literature reports on the use of titanium dioxide (particles or membranes) combined with ultraviolet light for long-term catalytic sterilization, but its application is quite limited. It requires the simultaneous use of ultraviolet light and water, and is generally suitable for disinfection outdoors, on damp surfaces, or in liquid environments.
[0004] In addition, although the above-mentioned methods can achieve non-ultraviolet light excitation by doping with metal ions, they bring other drawbacks, such as the leaching of metal ions. Even if the spectrum is successfully broadened, it cannot solve the problem that titanium dioxide itself poses a risk of damage to hard surfaces and skin. Therefore, there is an urgent need to provide a long-lasting antibacterial composition suitable for dry hard surfaces, as well as its application and usage method. Summary of the Invention
[0005] To achieve long-lasting antibacterial effect on dry, hard surfaces, this application provides a long-lasting antibacterial composition suitable for dry, hard surfaces, as well as its application and method of use, which can be cured into a film.
[0006] In a first aspect, this application provides an antibacterial composition, which adopts the following technical solution:
[0007] An antibacterial composition comprising a polymer precursor and a polymer base molecule in a molar ratio of 1:(100-200);
[0008] The polymer precursor is prepared by modifying the polymer by incorporating one or more of the following: amino, hydroxyl, double bond, siloxane, and isocyanate into a photodynamic molecule.
[0009] The photodynamic organic molecules are one or more of the following: porphyrins, metalloporphyrins, dihydroporphyrins, phthalocyanines, boron fluoride dipyrroles, pyrrolopyrrole diones, cyanine dyes, coumarins, benzonaphthones, isorhorazines, riboflavins, cyclic metal complexes and their derivatives.
[0010] By adopting the above technical solution, the polymer precursor can be fixed to the hard surface to be cleaned under the action of polymer base molecules and cured to form a dense coating. After the coating is cured, it has a strong hardness. The hard surface can be cleaned and disinfected by detergents, disinfectants, etc. Without strong mechanical force damage, the coating can last for more than a year.
[0011] Since the polymer precursor fixed in the coating only acts as a catalyst under light conditions and is not consumed, the antibacterial effect will continue as long as the coating is not damaged by mechanical force. It should also be noted that since the polymer precursor is chemically bonded, there is no problem of component precipitation. Therefore, the antibacterial effect of the coating can last for more than a year.
[0012] Furthermore, this application generates singlet oxygen solely through energy transfer under illumination. 1 O2), rather than generating hydroxyl radicals (OH·) or superoxide anions (O2) through electron or hydrogen atom transfer. - This can be demonstrated using fluorescent probes such as singlet oxygen green fluorescent probe (SOSG), dihydrorhodamine 123 (DHR 123), and hydroxyphenyl fluorescein (HPF), rather than hydroxyl radicals or superoxide anions.
[0013] Preferably, the photodynamic organic molecule is a metalloporphyrin, and the structural formula of the polymer precursor obtained by its modification is shown in formula (I):
[0014]
[0015] M is selected from one of Cu, Zn, Pd, Ir, Ni, and Mg;
[0016] The R is selected from one of -NH2, -OH, -O-CO-C(=CH2)-CH3, -NH-CO-C(=CH2)-CH3, -O-CO-NH-(CH2)3-Si(OCH3)3, -NH-CO-NH-(CH2)3-(SiOCH3)3, -O-CO-NH-(CH2)6-NCO, and -NH-CO-NH-(CH2)6-NCO.
[0017] Preferably, the polymer precursor shown in formula (I) includes any one of the following:
[0018]
[0019]
[0020]
[0021] By adopting the above technical solution, the above metalloporphyrin photodynamic organic molecules, after being modified by one or more of amino, hydroxyl, double bond, siloxane, and isocyanate, not only have a more complete cross-linking and curing reaction with the polymer substrate molecules, but also have a singlet oxygen quantum yield of more than 90%, thus further ensuring the long-lasting effect and antibacterial properties of the antibacterial composition.
[0022] Preferably, the polymer base molecule includes polymer base molecule A, which participates in copolymerization with the organic molecular polymer precursor;
[0023] The polymer base molecule A is one or more of toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, 3-aminopropyltrihydroxysilane, 3-aminopropyltriethoxysilane, 3-isocyanatopropyltrimethoxysilane, maleic acid, acryloyl, acrylic acid, and acrylonitrile.
[0024] And polymer base molecules B used to enhance the adhesion between the polymer and hard surface interfaces;
[0025] The polymer base molecule B is one or more of the following: methyl methacrylate, hydroxyethyl methacrylate, trifluoroethyl methacrylate, 2-ethyl-2-oxazoline, vinylpyrrolidone, tetraethoxysilane, modified silane, organosilicon quaternary ammonium salt, and tetrabutyl titanate.
[0026] Preferably, the ratio of polymer base molecule A to polymer base molecule B in the polymer base molecule is 1:(10-100).
[0027] By adopting the above technical solution, and using polymer base molecules A and B in a specific ratio and by selecting the combination, the antibacterial composition and its extended products can automatically trigger a polymerization and crosslinking reaction under the action of moisture and crosslinking catalyst after being sprayed on a hard surface. This results in both intermolecular crosslinking and chemical bonding with the hard surface to form a stable coating.
[0028] Secondly, this application provides the application of an antibacterial composition in the preparation of daily chemical products with antibacterial properties, the daily chemical products including antibacterial agents, toiletries, household products, kitchen and bathroom products, decorative products, and cosmetics.
[0029] Thirdly, this application provides an antibacterial agent comprising an antibacterial composition, wherein the amount of the antibacterial composition is 1-10 wt% of the total amount.
[0030] Preferably, it consists of the following components by weight percentage: 1-10% antibacterial composition, 0-10% deionized water, and the balance being an organic solvent.
[0031] Preferably, the weight percentage of each component is as follows: the organic solvent is composed of ethanol and isopropanol, wherein isopropanol accounts for 70-90 wt% of the total.
[0032] By adopting the above technical solution, the antibacterial agent composed of the above composition not only does not easily affect the original efficacy of the antibacterial composition, but can also be used for sterilization of dry surfaces. The sterilization process does not require an aqueous environment. In addition, the formulation of this application does not introduce additional free radicals, nanoparticles, etc.
[0033] Fourthly, the method of using antibacterial agents, including specific steps and conditions, is as follows:
[0034] 1) First, thoroughly clean the hard surface to be cleaned with a cleaning agent. After it dries, apply the antibacterial agent to the hard surface to be cleaned and perform secondary curing.
[0035] 2) The first stage of curing takes 25-35 minutes, during which the surface to be cleaned must not be touched. The second stage of curing takes 40-56 hours, during which time cleaning agents must not be used for further cleaning.
[0036] By adopting the above technical solution, the coating formed after the above two-stage curing has an excellent bonding effect with the hard surface to be cleaned. It can be maintained for more than a year without the influence of external forces, and does not affect the routine cleaning and disinfection operations of other cleaning agents and disinfectants during this period.
[0037] In summary, this application has the following beneficial effects:
[0038] 1. The polymer precursor in this application can generate singlet oxygen (1O2) through energy transfer under light irradiation, thereby achieving an antibacterial effect. Moreover, since it only acts as a catalyst and is not consumed itself, it will continue to have an antibacterial effect as long as the coating is not damaged by mechanical force.
[0039] 2. The specific proportions and selection of polymer base molecules A and B in this application enable the antibacterial composition and its extended products to automatically trigger a polymerization and crosslinking reaction under the action of moisture and crosslinking catalyst after being sprayed on a hard surface, thus forming a stable coating through intermolecular crosslinking and chemical bonding with the hard surface.
[0040] 3. In addition to having a wide range of applications, the antibacterial composition in this application has simple components and is not likely to affect the original efficacy of the antibacterial composition. It can be used for sterilization of dry surfaces and the sterilization process does not require an aqueous environment.
[0041] 4. The application method described in this application, namely the coating formed after the above-mentioned two-stage curing, has an excellent bonding effect with the hard surface to be cleaned. It can be maintained for more than one year without the influence of external forces, and does not affect the routine cleaning and disinfection operations of other cleaning agents and disinfectants during this period. Detailed Implementation
[0042] The present application will be further described in detail below with reference to the embodiments.
[0043] Preparation Example
[0044] Preparation Examples 1-3
[0045] An antibacterial composition, except that the amount of polymer precursor used (1 mol / 693.13 g) remains constant, has a different molar ratio of polymer precursor to polymer matrix molecules, as shown in the table below:
[0046] The polymer precursor is of formula (I-2):
[0047]
[0048] The polymer base molecule is 3-aminopropyltriethoxysilane.
[0049] Table: Comparison of component ratios in antibacterial compositions in Preparation Examples 1-5
[0050] Group Antibacterial composition component ratio Preparation Example 1 The molar ratio of polymer precursor to polymer matrix molecules is 1:100. Preparation Example 2 The molar ratio of polymer precursor to polymer matrix molecules is 1:150. Preparation Example 3 The molar ratio of polymer precursor to polymer matrix molecules is 1:200.
[0051] Preparation Examples 4-10
[0052] An antibacterial composition differs from Preparation Example 2 in that the molar amount of the polymer precursor remains the same, but the specific selection is different, as shown in the table below.
[0053] Table: Comparison of Polymer Precursor Ratios in Preparation Examples 4-10
[0054]
[0055]
[0056] Preparation Examples 11-15
[0057] An antibacterial composition differs from Preparation Example 2 in that the total molar amount of polymer base molecules remains the same, but the specific selection is different, as shown in the table below.
[0058] Table: Comparison Table of Polymer Substrates for Preparation Examples 11-15
[0059]
[0060] The antibacterial agents prepared in the examples and comparative examples were selected as test objects (3 items in parallel groups) for performance testing. Their antibacterial properties and long-lasting effects were then tested. The test steps and conditions are as follows:
[0061] Conditions for antibacterial coatings made with antibacterial agents:
[0062] 1) First use White Cat Multi-functional Cleaning Spray (each spray can clean approximately 30*30cm). 2 Thoroughly clean the hard surface to be cleaned, and after it dries, apply the antibacterial agent to the hard surface to be cleaned and perform secondary curing. The coating thickness is about 1 μm.
[0063] 2) The first stage of curing takes 30 minutes and must not be exposed to hard surfaces during this time. The second stage of curing takes 48 hours and must not be cleaned again with cleaning agents during this time. This is the antibacterial coating to be tested.
[0064] Antibacterial performance test method:
[0065] Based on ISO-22196, this design incorporates the illumination parameter, using the "Dylight" LED device with a wavelength of 405nm and a light intensity of 20mW / cm². 2 ;
[0066] The culture medium used was Mueller Hinton (MH) medium;
[0067] The bacterial strain was Staphylococcus aureus (ATCC 6538), and the initial concentration of the bacterial suspension was 10 cfu / mL.
[0068] After inoculating the initial inoculum (50 μL) onto the antibacterial coating to be tested, do not cover with aluminum foil, and first place it in the dark at 37°C for 60 minutes to air dry;
[0069] Then, after 10 minutes of light exposure, colony counting was performed on the antibacterial coating to be tested. The sterilization rate was then calculated based on the ratio of the colony count to that of the control group (coated but not exposed to light).
[0070] Antibacterial long-lasting effect test method:
[0071] It is mainly based on DIN EN ISO-11998:2006 and is tested using a water-resistant friction tester. The friction head is a standard sponge friction head (135g). The sponge friction head is moistened with 4g of detergent. 200 cycles of friction are equivalent to one year of daily cleaning conditions.
[0072] Then, the antibacterial performance before and after friction is evaluated by the retention rate, still using Staphylococcus aureus as a representative. If the retention rate is still ≥90%, it indicates that the coating still has an antibacterial effect; if the retention rate is ≥99%, it indicates that the coating still has a strong antibacterial effect.
[0073] Example
[0074] Examples 1-5
[0075] An antibacterial agent, the components of which are shown in the table below and their corresponding weights, is prepared by stirring at 500 r / min for 30 min at room temperature.
[0076] The antibacterial composition was prepared in Preparation Example 1;
[0077] The organic solvent is composed of ethanol and isopropanol in a weight ratio of 3:7.
[0078] Table: Components and weights (kg) of the antibacterial agent raw materials in Examples 1-5
[0079]
[0080] Comparative Example 1
[0081] An antibacterial composition, except that the antibacterial composition used is replaced by an equal amount of titanium dioxide (particle size 10 nm), is prepared under the same conditions and in the same process as in Example 1.
[0082] Comparative Example 2
[0083] An antibacterial composition, except that the antibacterial composition used does not contain polymer base molecules, is otherwise identical in terms of conditions and preparation process to Example 1.
[0084] The antibacterial agents prepared in Examples 1-5 and Comparative Examples 1-2 were tested for their bactericidal rate (%) and retention rate (%) according to the above measurement steps and standards. The average value of the test results was recorded.
[0085] Table: Test results of antimicrobial agent performance in Examples 1-5 and Comparative Examples 1-2
[0086]
[0087] As can be seen from the table above, the antibacterial agents prepared in Examples 1-5 all have excellent antibacterial properties and long-lasting effects, and are suitable for dry hard surfaces. Their sterilization rate is as high as 99.92-99.99%, and their retention rate is as high as 99.88-99.95%, which are all improved to varying degrees compared with Comparative Examples 1-2.
[0088] Based on the above analysis of the embodiments and comparative data, the possible reasons are as follows:
[0089] The polymer precursor can be fixed to a hard surface by chemical bonds under the action of polymer base molecules and cured to form a dense coating. Simulation tests show that the coating has a strong hardness after curing and can be cured and maintained for more than one year.
[0090] Furthermore, since the polymer precursor fixed in the coating only acts as a catalyst under light conditions and is not consumed, it has an antibacterial effect even under non-external conditions, and its antibacterial effect can last for more than a year. The above effects are obviously impossible to achieve in comparisons 1-2.
[0091] Furthermore, as can be seen from Examples 1-5, the preferred weight percentages of each component of the antibacterial agent are as follows: 1-10% antibacterial composition, 0-10% deionized water, and the balance being organic solvent;
[0092] The main functional substance is an antibacterial composition. The amount of the composition has a significant impact on the sterilization rate and retention rate. However, when the amount is 5-10%, the performance is basically stable and no longer improves with the increase of the amount.
[0093] As for the selection of deionized water and organic solvents, they mainly have a certain impact on the distribution and curing of the antibacterial composition in the coating. Therefore, they can be replaced and selected according to the actual situation and physical properties, but they cannot be used as a limitation on the scope of protection of this application.
[0094] Examples 6-7
[0095] An antibacterial agent differs from that in Example 1 in that the antibacterial composition used is used differently, as shown in the table below.
[0096] Table: Comparison of the use of antibacterial compositions in Examples 6-7
[0097] Group Antibacterial Composition Example 6 Prepared from Preparation Example 2 Example 7 Prepared from Preparation Example 3
[0098] Comparative Example 3
[0099] An antibacterial composition differs from Example 1 in that the amount of polymer precursor in the antibacterial composition remains unchanged, the molar ratio of polymer precursor to polymer base molecules is 1:50, and other conditions and preparation processes are the same as in Example 1.
[0100] The antibacterial agents prepared in Examples 6-7 and Comparative Example 3 were tested for their bactericidal rate (%) and retention rate (%) according to the above measurement steps and standards. The average value of the test results was recorded.
[0101] Table: Test results of antimicrobial agent performance in Examples 6-7 and Comparative Example 3
[0102]
[0103]
[0104] As can be seen from the table above, the antibacterial agents prepared in Examples 1 and 6-7 all exhibit excellent antibacterial properties and long-lasting effects, and are suitable for dry, hard surfaces. Their bactericidal rates are all 99.92%, and their retention rates are as high as 99.88-99.92%, significantly improved compared to Comparative Example 3. Based on the data from both examples and comparative examples, the reasons for this improvement may be as follows:
[0105] The relative content of polymer precursors has a certain impact on antibacterial effects. When the content is too low, the concentration of singlet oxygen produced is low, which is not conducive to sterilization. When the relative content is too high, energy is prone to "self-quenching," which also leads to a low concentration of singlet oxygen produced, thus being unfavorable for sterilization.
[0106] Examples 8-14
[0107] An antibacterial agent differs from that in Example 1 in that the antibacterial composition used is used differently, as shown in the table below.
[0108] Table: Comparison of the use of antibacterial compositions in Examples 8-14
[0109] Group Antibacterial Composition Example 8 Prepared from Preparation Example 4 Example 9 Prepared from Preparation Example 5 Example 10 Prepared from Preparation Example 6 Example 11 Prepared from Preparation Example 7 Example 12 Prepared from Preparation Example 8 Example 13 Prepared from Preparation Example 9 Example 14 Prepared from Preparation Example 10
[0110] Comparative Example 4
[0111] An antibacterial composition differs from Example 1 in that the polymer precursor in the antibacterial composition is replaced by an equal amount of tetraphenyl metalloporphyrin, while other conditions and preparation processes are the same as in Example 1.
[0112] The antibacterial agents prepared in Examples 8-14 and Comparative Example 4 were tested for their bactericidal rate (%) and retention rate (%) according to the above measurement steps and standards. The average value of the test results was recorded.
[0113] Table: Test results of antimicrobial agent performance in Examples 8-14 and Comparative Example 4
[0114]
[0115] As can be seen from the table above, the antibacterial agents prepared in Examples 1 and 8-14 all have excellent antibacterial properties and long-lasting effects, and are suitable for dry hard surfaces. Their bactericidal rate is 99.86-99.96%, and their retention rate is as high as 99.79-99.93%, which are all improved to varying degrees compared with Comparative Example 4.
[0116] Based on the above analysis of the embodiments and comparative data, the possible reasons are as follows:
[0117] After being modified by one or more of amino, hydroxyl, double bond, siloxane, and isocyanate, the above-mentioned porphyrin photodynamic organic molecules not only have a more complete cross-linking and curing reaction with the polymer substrate molecules, but also have a singlet oxygen quantum yield of more than 90%, thus further ensuring the long-lasting effect and antibacterial properties of the antibacterial composition.
[0118] Examples 15-19
[0119] An antibacterial agent differs from that in Example 1 in that the antibacterial composition used is used differently, as shown in the table below.
[0120] Table: Comparison of the use of antibacterial compositions in Examples 15-19
[0121] Group Antibacterial Composition Example 15 Prepared from Preparation Example 11 Example 16 Prepared from Preparation Example 12 Example 17 Prepared from Preparation Example 13 Example 18 Prepared from Preparation Example 14 Example 19 Prepared from Preparation Example 15
[0122] Take the antibacterial agents prepared in Examples 15-19 above, and test their bactericidal rate (%) and retention rate (%) according to the above measurement steps and standards. The average value of the test results is recorded.
[0123] Table: Test Results of Antimicrobial Agent Performance in Examples 15-19
[0124]
[0125] As can be seen from the table above, the antibacterial agents prepared in Examples 1 and 15-19 all have excellent antibacterial properties and long-lasting effects, and are suitable for dry hard surfaces. Their bactericidal rate is 99.75-99.92%, and their retention rate is as high as 99.60-99.85%, which are all improved to varying degrees compared with Comparative Example 4.
[0126] Based on the above analysis of the embodiments and comparative data, the possible reasons are as follows:
[0127] By using a specific ratio and selecting polymer base molecules A and B together, the antibacterial composition and its extended products can automatically trigger a polymerization and cross-linking reaction after being sprayed onto a hard surface under the action of moisture and a cross-linking catalyst. This results in both intermolecular cross-linking and chemical bonding with the hard surface to form a stable coating.
[0128] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.
Claims
1. An antibacterial composition, characterized in that, It consists of polymer precursor and polymer base molecules in a molar ratio of 1:(100-200); The polymer precursor is prepared by modifying the polymer by incorporating one or more of amino, hydroxyl, double bond, siloxane, and isocyanate groups into a photodynamic organic molecule. The photodynamic organic molecule is a metalloporphyrin, and the structural formula of the polymer precursor obtained by its modification is shown in formula (I): Equation (I); M is selected from one of Cu, Zn, Pd, Ir, Ni, and Mg; The R is selected from one of -NH2, -OH, -O-CO-C(=CH2)-CH3, -NH-CO-C(=CH2)-CH3, -O-CO-NH-(CH2)3-Si(OCH3)3, -NH-CO-NH-(CH2)3-(SiOCH3)3, -O-CO-NH-(CH2)6-NCO, and -NH-CO-NH-(CH2)6-NCO.
2. The antibacterial composition according to claim 1, characterized in that, The polymer precursor shown in formula (I) includes any one of the following: Equation (I-1); Equation (I-2); Equation (I-3); Equation (I-4); Equation (I-5); Equation (I-6); Equation (I-7); Equation (I-8).
3. The antibacterial composition according to claim 1, characterized in that, The polymer substrate molecule includes polymer substrate molecule A, which participates in copolymerization with the polymer precursor; The polymer base molecule A is one or more of the following: toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, 3-aminopropyltrihydroxysilane, 3-aminopropyltriethoxysilane, 3-isocyanatopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, maleic acid derivatives, acryloyl derivatives, acrylic acid derivatives, and acrylonitrile derivatives; And polymer base molecules B used to enhance the adhesion between the polymer and hard surface interfaces; The polymer base molecule B is one or more of the following: methyl methacrylate, hydroxyethyl methacrylate, trifluoroethyl methacrylate, 2-ethyl-2-oxazoline, vinylpyrrolidone, tetraethoxysilane, modified silane, organosilicon quaternary ammonium salt, and tetrabutyl titanate.
4. The antibacterial composition according to claim 3, characterized in that, The weight ratio of polymer base molecule A to polymer base molecule B in the polymer base molecule is 1:(10-100).
5. The use of the antibacterial composition according to any one of claims 1-4 in the preparation of coated articles with antibacterial properties, characterized in that, The coated products include elevator supplies, office supplies, transportation supplies, and hospital supplies.
6. An antibacterial agent, characterized in that, Includes the antimicrobial composition according to any one of claims 1-4, wherein the amount of the antimicrobial composition is 1-10 wt% of the total amount.
7. The antibacterial agent according to claim 6, characterized in that, It consists of the following components by weight percentage: 1-10% of the antibacterial composition according to any one of claims 1-4, 0-10% of deionized water, and the balance being an organic solvent.
8. The antibacterial agent according to claim 7, characterized in that, The weight percentage of each component is as follows: the organic solvent is composed of ethanol and isopropanol, wherein isopropanol accounts for 70-90 wt% of the total.
9. The method of using the antibacterial agent according to any one of claims 6-8, characterized in that, The usage steps and conditions are as follows: 1) First, thoroughly clean the hard surface to be cleaned with a cleaning agent. After it dries, apply the antibacterial agent to the hard surface to be cleaned and perform secondary curing. 2) The first stage of curing takes 25-35 minutes, during which the surface to be cleaned must not be touched. The second stage of curing takes 40-56 hours, during which time cleaning agents must not be used for further cleaning.