An antibacterial and antiviral agent and its application in rubber and plastic materials

Abstract

This invention relates to the field of microbial protection technology, particularly to the field of IPC C08K13, and further to an antibacterial and antiviral agent and its application in rubber and plastic materials. By weight, the raw materials include: 10-60 parts of inorganic antibacterial agent, 10-30 parts of organic antibacterial agent, 1-5 parts of coupling agent, and 10-50 parts of solvent; the inorganic antibacterial agent includes inorganic antibacterial agent A and inorganic antibacterial agent B. This invention modifies the inorganic antibacterial agent and then grafts an organic antibacterial agent onto the modified inorganic antibacterial agent, resulting in an antibacterial and antiviral agent with high heat resistance and high antibacterial and antiviral efficiency; rubber and plastic products containing the antibacterial and antiviral agent of this invention exhibit excellent antibacterial and antiviral properties.

Description

Technical Field

[0001] This invention relates to the field of microbial protection technology, particularly to the field of IPC C08K13, and further to an antibacterial and antiviral agent and its application in rubber and plastic materials. Background Technology

[0002] Currently, plastic and rubber products are widely used in various aspects of people's lives, such as medical and health care, auto parts, home appliances, and daily necessities. However, plastic and rubber products themselves do not possess antibacterial or antiviral properties, and their surfaces often carry microorganisms from the natural environment. When people come into contact with these products, they may also come into contact with these surface microorganisms. Therefore, plastic and rubber products, which are closely related to human life, can easily become a medium for the spread of harmful microorganisms, posing a threat to human health. Thus, research on antibacterial and antiviral plastic and rubber products has become an important research direction in functional polymer materials.

[0003] Each type of antibacterial and antiviral agent has its own advantages and disadvantages. Considering the special processing technology of plastic and rubber materials, inorganic agents have a strong advantage in heat resistance and are therefore widely used in plastic products. However, their delayed antibacterial effect, high price, and easy discoloration can no longer meet the market's higher performance requirements, especially in the face of the complex infectious diseases and epidemics caused by the frequent mutation of harmful microorganisms. For example, the novel coronavirus can survive on plastic surfaces for several days. How to simultaneously achieve high efficiency, rapid action, safety, long-lasting effect, good stability, low production cost, and simple synthesis routes for antibacterial and antiviral agents is an important research direction for antibacterial and antiviral agents.

[0004] Composite antibacterial and antiviral agents are generally prepared by combining two or more antibacterial and antiviral agents through physical blending or chemical reaction. Chinese Patent CN 113718522 A discloses a long-acting antibacterial composition and its preparation method. The raw materials of the antibacterial composition include inorganic antibacterial agents, organic antibacterial agents, additives, and solvents. The antibacterial composition prepared by this invention achieves highly efficient bactericidal and antiviral effects through the combined action of multiple raw materials, increasing the stability of the antibacterial composition itself. Chinese Patent CN101189971A discloses an inorganic / organic nanocomposite antibacterial agent and its application in fiber products. The method involves processing inorganic antibacterial agents, organic antibacterial agents, inorganic / organic antibacterial agent compatibility treatment agents, polymeric adhesives, stabilizers to prevent discoloration of inorganic antibacterial agents, high-efficiency emulsifiers, and distilled water according to a weight ratio and order of addition, including wetting dispersion, grinding, high-speed dispersion, and stirring, to obtain a nanoscale composite antibacterial agent.

[0005] However, simple physical blending cannot completely overcome the shortcomings of single antibacterial and antiviral agents. For example, some inorganic antibacterial and antiviral agents still have low antibacterial efficiency, require high addition amounts, and have poor compatibility with the matrix; organic antibacterial and antiviral agents are prone to causing bacterial resistance, have poor heat resistance, and are easy to migrate. Therefore, preparing safe and environmentally friendly inorganic-organic composite antibacterial and antiviral agents by chemical grafting inorganic and organic antibacterial and antiviral agents is an effective method for preparing highly efficient, long-lasting, fast-acting, safe, and environmentally friendly antibacterial and antiviral agents. Summary of the Invention

[0006] The first aspect of the present invention provides an antibacterial and antiviral agent, which, by weight, comprises: 10-60 parts of inorganic antibacterial agent, 10-30 parts of organic antibacterial agent, 1-5 parts of coupling agent, and 10-50 parts of solvent; wherein the inorganic antibacterial agent comprises inorganic antibacterial agent A and inorganic antibacterial agent B.

[0007] In some preferred embodiments, the inorganic antibacterial agent A is selected from one or more combinations of silver-loaded zeolite, zinc-loaded zeolite, silver-zinc-loaded zeolite, copper-loaded zeolite, silver-zinc-copper-loaded zeolite, silver-loaded glass, silver-zinc-loaded glass, zinc-loaded glass, copper-loaded glass, silver-zinc-copper-loaded glass, silver-loaded zirconium phosphate, silver-zinc-phosphate, copper-loaded zirconium phosphate, silver-zinc-copper-phosphate, silver-loaded silica, silver-zinc-silica, and silver-zinc-copper-silica.

[0008] In some preferred embodiments, the inorganic antibacterial agent A is silver-loaded silicon dioxide.

[0009] In some preferred embodiments, the inorganic antibacterial agent B is selected from one or more combinations of nano silver, nano cuprous oxide, nano zinc oxide, nano copper oxide, nano silver-loaded titanium dioxide, nano silver-zinc-loaded titanium dioxide, nano silver-copper-loaded titanium dioxide, and nano silver-zinc-copper-loaded titanium dioxide.

[0010] In some preferred embodiments, the inorganic antibacterial agent B is nano-copper oxide and nano-zinc oxide.

[0011] In some preferred embodiments, the weight ratio of the silver-loaded silicon dioxide, nano-copper oxide, and nano-zinc oxide is (1-3):(0.5-2):1.

[0012] During the experiment, the applicant discovered that by modifying the antibacterial and antiviral agent with silver-loaded silica, nano-copper oxide, and nano-zinc oxide, the prepared antibacterial and antiviral agent could exhibit highly efficient and broad-spectrum antibacterial effects. In particular, when the weight ratio of silver-loaded silica, nano-copper oxide, and nano-zinc oxide was (1-3):(0.5-2):1, the antibacterial and antiviral agent's antibacterial effect against bacteria could be further enhanced. The applicant hypothesizes that when silver-loaded silica, nano-copper oxide, and nano-zinc oxide are used in the modified system, a bactericidal system containing silver, copper, and zinc oxide can be formed. When the weight ratio is (1-3):(0.5-2):1, the agglomeration of the prepared antibacterial and antiviral agent can be prevented, increasing the contact area between the antibacterial and antiviral agent and harmful microorganisms such as bacteria and viruses, thereby improving the antibacterial and antiviral effect of the antibacterial and antiviral agent.

[0013] In some preferred embodiments, the coupling agent is selected from any one of silane coupling agents, titanate coupling agents, zirconate coupling agents, and aluminate coupling agents.

[0014] In some preferred embodiments, the coupling agent is a titanate coupling agent.

[0015] In this invention, the inorganic antibacterial agent contains a large number of hydroxyl groups on its surface, and the titanate coupling agent can react chemically with it to obtain a modified inorganic antibacterial agent.

[0016] To improve the modification effect of inorganic antibacterial agents, in some preferred embodiments, the weight ratio of the inorganic antibacterial agent to the titanate coupling agent is (30-60):1. During the entire reaction process, if the coupling agent content is low, it can only react with a portion of the inorganic antibacterial agent, and unreacted inorganic antibacterial agents may aggregate, resulting in a low grafting rate between the inorganic and organic antibacterial agents, thus reducing the antibacterial and antiviral performance of the antibacterial and antiviral agents. If the amount of coupling agent is excessive, the excess titanate coupling agent present in the dispersion system may form bridges between the modified inorganic antibacterial agent particles, causing the modified inorganic antibacterial agent to regenerate larger aggregates, resulting in the system being unable to maintain a stable state.

[0017] In some preferred embodiments, the organic antibacterial agent is selected from at least one of pyridine antibacterial agents, imidazole antibacterial agents, isothiazole antibacterial agents, quaternary ammonium salt antibacterial agents, phenolic antibacterial agents, ester antibacterial agents, guanidine antibacterial agents, high molecular weight organotin antibacterial agents, and high molecular weight haloamine antibacterial agents.

[0018] In some preferred embodiments, the organic antibacterial agent is an isothiazole antibacterial agent.

[0019] In some preferred embodiments, the isothiazole antibacterial agent is selected from any one of 4,5-dichloro-2-methyl-4-isothiazolin-3-one, 2-methyl-4-isothiazolin-3-one, dichloro-N-octyl-4-isothiazolin-3-one, methylbenzisothiazolinone, and n-butyl-1,2-benzisothiazolin-3-one.

[0020] In this invention, a modified inorganic antibacterial agent is prepared by cross-linking an inorganic antibacterial agent with a titanate coupling agent. Then, an isothiazole antibacterial agent is grafted onto the modified inorganic antibacterial agent, which significantly enhances the stability of the antibacterial and antiviral agent. The applicant has discovered that when the weight ratio of the inorganic antibacterial agent to the isothiazole antibacterial agent is (1.5-4):1, not only are the antibacterial and antiviral effects of the antibacterial and antiviral agent improved, but their antifungal properties are also enhanced. The applicant hypothesizes that within this range, the modification effect of the inorganic antibacterial agent is good, exhibiting excellent dispersibility and preventing agglomeration into large particles, thereby increasing the grafting rate between the modified inorganic and organic antibacterial agents, and further enhancing the antibacterial, antiviral, and antifungal effects of the antibacterial and antiviral agent.

[0021] This invention utilizes isothiazole antibacterial agents to effectively improve the high efficiency, rapid action, and broad-spectrum effects of antibacterial and antiviral agents. In particular, when n-butyl-1,2-benzisothiazolin-3-one is used, the prepared antibacterial and antiviral agent exhibits excellent long-lasting antibacterial effects. The applicant hypothesizes that by modifying inorganic antibacterial agents such as silver-loaded silica, nano-copper oxide, and nano-zinc oxide and grafting them with n-butyl-1,2-benzisothiazolin-3-one, a sustained-release effect of the composite antibacterial and antiviral agent can be achieved during use, thereby achieving long-lasting antibacterial and antiviral effects.

[0022] In some preferred embodiments, the solvent is selected from one or more combinations of isopropanol, toluene, and xylene.

[0023] A second aspect of the present invention provides a method for preparing an antibacterial and antiviral agent, characterized by comprising the following steps:

[0024] (1) Disperse the coupling agent in 1 / (0.5-2) of the solvent in the formula to prepare a coupling agent solution. Add inorganic antibacterial agent A and inorganic antibacterial agent B to the coupling agent solution for modification treatment. After filtration, washing and drying, the modified inorganic antibacterial agent is obtained.

[0025] (2) Disperse the modified inorganic antibacterial agent in the remaining solvent, add the organic antibacterial agent, and after the reaction is completed, filter, wash and dry to obtain the antibacterial and antiviral agent.

[0026] The third aspect of the present invention provides an antibacterial and antiviral rubber, which, by weight, comprises: 60-80 parts of silicone rubber, 2-6 parts of softener, 35-50 parts of reinforcing agent, 0.1-5 parts of antibacterial and antiviral agent, and 0.1-2 parts of vulcanizing agent.

[0027] In some preferred embodiments, the silicone rubber is selected from at least one of methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber, and fluorosilicone rubber.

[0028] In some preferred embodiments, the silicone rubber is methyl vinyl silicone rubber and methyl phenyl vinyl silicone rubber.

[0029] In some preferred embodiments, the weight ratio of the methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber and antibacterial and antiviral agent is (30-80):(10-40):1.

[0030] The applicant unexpectedly discovered that when the weight ratio of methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber, and antibacterial and antiviral agent is (30-80):(10-40):1, not only does the antibacterial and antiviral rubber possess good mechanical properties, but it also enhances the antibacterial and antiviral effects of the antibacterial and antiviral rubber. The applicant speculates that at this weight ratio, the antibacterial and antiviral agent exhibits good dispersibility in methyl vinyl silicone rubber and methyl phenyl vinyl silicone rubber, making it less prone to aggregation and agglomeration, thus allowing the antibacterial and antiviral agent to exert its optimal antibacterial and antiviral effects.

[0031] In some preferred embodiments, the softener is selected from at least one of coumarone-indene resin, phenolic resin, xylene-formaldehyde resin, polyterpene resin, petroleum hydrocarbon resin, and rosin resin.

[0032] In some preferred embodiments, the reinforcing agent is selected from at least one of carbon black, silica, ultrafine activated calcium carbonate, and activated clay.

[0033] In some preferred embodiments, the vulcanizing agent is selected from at least one of dicumyl peroxide, benzoyl peroxide, di-tert-butyl peroxide, and dicumyl hydroperoxide.

[0034] The preparation of antibacterial and antiviral rubber includes the following steps: first, silicone rubber raw rubber, softener, reinforcing agent and antibacterial and antiviral agent are mixed; then, vulcanizing agent is added in the later stage of mixing for vulcanization; finally, antibacterial and antiviral rubber is obtained through calendering and extrusion molding processes.

[0035] The mixing temperature is 40-60℃ and the mixing time is 20-60 min; the vulcanization temperature is 110-170℃ and the vulcanization time is 5-10 min.

[0036] The fourth aspect of the present invention provides an antibacterial and antiviral plastic, the raw materials of which, by weight, include: 90-99 parts of matrix resin and 2-15 parts of antibacterial and antiviral masterbatch; the antibacterial and antiviral masterbatch, by weight, includes: 90-110 parts of matrix resin, 1-30 parts of antibacterial and antiviral agent, and 1-10 parts of dispersant.

[0037] In some preferred embodiments, the matrix resin is selected from at least one of PE, PP, ABS, PET, TPU, and TPE.

[0038] In some preferred embodiments, the dispersant is selected from at least one of oxidized polyethylene wax, water glass, sodium tripolyphosphate, sodium hexametaphosphate, sodium pyrophosphate, triethylhexylphosphonic acid, sodium dodecyl sulfate, methylpentanol, cellulose derivatives, polyacrylamide, glucon, and fatty acid polyethylene glycol esters.

[0039] The preparation of antibacterial and antiviral plastics includes the following steps: (1) Preparation of antibacterial and antiviral masterbatch: The matrix resin, antibacterial and antiviral agent and dispersant are mixed evenly and then fed into a twin-screw extruder through the feed port. The twin-screw extruder is used to granulate the mixture to obtain antibacterial and antiviral masterbatch.

[0040] (2) Preparation of antibacterial and antiviral plastics: Antibacterial and antiviral masterbatch is added to the base resin and mixed evenly by a high-speed mixer to obtain a mixture; the mixture is then processed by common molding processes such as injection molding and calendering to obtain antibacterial and antiviral plastics.

[0041] Beneficial effects:

[0042] 1. The antibacterial and antiviral agent prepared by this invention can effectively resist various microorganisms and exhibits highly efficient, fast-acting, long-lasting, and broad-spectrum antibacterial and antiviral effects.

[0043] 2. The antibacterial and antiviral agent prepared by this invention has good stability and is not easily decomposed and has good heat resistance when applied to rubber and plastics.

[0044] 3. This invention modifies silver-loaded silica, nano-copper oxide, and nano-zinc oxide, and then grafts them with isothiazole antibacterial agents. This effectively prevents the migration of organic antibacterial agents, has a slow-release effect, and extends the antibacterial and antiviral lifespan of rubber and plastic materials.

[0045] 4. The antibacterial and antiviral agent prepared by this invention can reduce mold activity, inhibit mold growth and reproduction, and improve the anti-mold effect of rubber and plastic products.

[0046] 5. The antibacterial and antiviral agent prepared by this invention has the advantages of being environmentally friendly, safe, low-cost, and having a simple and easy process. Detailed Implementation

[0047] Example 1

[0048] Example 1 provides an antibacterial and antiviral agent, which, by weight, comprises: 50 parts of inorganic antibacterial agent, 20 parts of organic antibacterial agent, 4 parts of coupling agent, and 40 parts of solvent; the inorganic antibacterial agent includes inorganic antibacterial agent A and inorganic antibacterial agent B.

[0049] The inorganic antibacterial agent A is silver-loaded silicon dioxide, purchased from Xuancheng Jingrui New Materials Co., Ltd.

[0050] The inorganic antibacterial agent B is nano copper oxide and nano zinc oxide, both purchased from Xuancheng Jingrui New Materials Co., Ltd.

[0051] The weight ratio of the silver-loaded silicon dioxide, nano-copper oxide, and nano-zinc oxide is 2:1:1.

[0052] The organic antibacterial agent is n-butyl-1,2-benzisothiazolin-3-one (CAS No.: 4299-07-4), purchased from Jinan Rongzheng Chemical Co., Ltd.

[0053] The coupling agent is isopropyl dioleoyl oxytitanate (CAS No.: 61417-49-0), purchased from Nanjing Quanxi Chemical Co., Ltd.

[0054] The solvent is isopropanol (CAS No.: 67-63-0).

[0055] A method for preparing an antibacterial and antiviral agent:

[0056] (1) Isopropyl dioleoyl oxytitanate was dispersed in 1 / 2 of the weight of isopropanol to prepare a coupling agent solution. Silver-loaded silica, nano copper oxide and nano zinc oxide were added to the coupling agent solution for modification treatment. After filtration, washing and drying, the modified inorganic antibacterial agent was obtained.

[0057] (2) Disperse the modified inorganic antibacterial agent in the remaining solvent, add n-butyl-1,2-benzisothiazolin-3-one, and after the reaction is complete, filter, wash and dry to obtain the antibacterial and antiviral agent.

[0058] Example 2

[0059] Example 2 provides an antibacterial and antiviral agent, which, by weight, comprises: 30 parts of inorganic antibacterial agent, 20 parts of organic antibacterial agent, 2 parts of coupling agent, and 40 parts of solvent; the inorganic antibacterial agent includes inorganic antibacterial agent A and inorganic antibacterial agent B.

[0060] The inorganic antibacterial agent A is silver-loaded silicon dioxide, purchased from Xuancheng Jingrui New Materials Co., Ltd.

[0061] The inorganic antibacterial agent B is nano copper oxide and nano zinc oxide, both purchased from Xuancheng Jingrui New Materials Co., Ltd.

[0062] The weight ratio of the silver-loaded silicon dioxide, nano-copper oxide, and nano-zinc oxide is 2:2:1.

[0063] The organic antibacterial agent is n-butyl-1,2-benzisothiazolin-3-one (CAS No.: 4299-07-4), purchased from Jinan Rongzheng Chemical Co., Ltd.

[0064] The coupling agent is isopropyl dioleoyl oxytitanate (CAS No.: 61417-49-0), purchased from Nanjing Quanxi Chemical Co., Ltd.

[0065] The solvent is isopropanol (CAS No.: 67-63-0).

[0066] A method for preparing an antibacterial and antiviral agent:

[0067] (1) Isopropyl dioleoyl oxytitanate was dispersed in 1 / 3 of the weight of isopropanol to prepare a coupling agent solution. Silver-loaded silica, nano copper oxide and nano zinc oxide were added to the coupling agent solution for modification treatment. After filtration, washing and drying, the modified inorganic antibacterial agent was obtained.

[0068] (2) Disperse the modified inorganic antibacterial agent in the remaining solvent, add n-butyl-1,2-benzisothiazolin-3-one, and after the reaction is complete, filter, wash and dry to obtain the antibacterial and antiviral agent.

[0069] Example 3

[0070] Example 3 provides an antibacterial and antiviral agent, the specific implementation of which is the same as that of Example 1, except that the weight ratio of the silver-loaded silica, nano copper oxide and nano zinc oxide is 0.5:3:1.

[0071] Example 4

[0072] Example 4 provides an antibacterial and antiviral agent, the specific implementation of which is the same as that of Example 1, except that the coupling agent is 3 parts by weight.

[0073] Example 5

[0074] Example 5 provides an antibacterial and antiviral agent, the specific implementation of which is the same as that of Example 1, except that the inorganic antibacterial agent is 25 parts by weight.

[0075] Example 6

[0076] Example 6 provides an antibacterial and antiviral agent, the specific implementation of which is the same as that of Example 1, except that the inorganic antibacterial agent B is nano copper oxide and nano cuprous oxide, both of which were purchased from Xuancheng Jingrui New Materials Co., Ltd.

[0077] Example 7

[0078] Example 7 provides an antibacterial and antiviral agent, the specific implementation of which is the same as that of Example 1, except that the organic antibacterial agent is polyhexamethylene biguanide hydrochloride, which was purchased from Hebei Liangneng Biotechnology Co., Ltd.

[0079] Application Example 1

[0080] Application Example 1 provides an antibacterial and antiviral rubber, which, by weight, comprises: 70 parts silicone rubber, 4 parts softener, 40 parts reinforcing agent, 1 part antibacterial and antiviral agent, and 1 part vulcanizing agent.

[0081] The silicone rubber is methyl vinyl silicone rubber and methyl phenyl vinyl silicone rubber; the methyl vinyl silicone rubber was purchased from Zhejiang Hengyecheng Organosilicon Co., Ltd., model: 110-1; the methyl phenyl vinyl silicone rubber was purchased from Anhui Aiyota Silicone Oil Co., Ltd., model: IOTA120.

[0082] The weight ratio of the methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber, and antibacterial and antiviral agent is 50:20:1.

[0083] The softener is a phenolic resin, purchased from Wuxi Xinyehao Chemical Co., Ltd., model number: 2123.

[0084] The reinforcing agent is silica, purchased from Changtai Micro-Nano Chemical Plant in Shouguang City, Shandong Province, model: CT-30.

[0085] The antibacterial and antiviral agent is the same as the one prepared in Example 1.

[0086] The vulcanizing agent is dicumyl peroxide (CAS No.: 80-43-3).

[0087] The preparation of antibacterial and antiviral rubber includes the following steps: first, methyl vinyl silicone rubber raw rubber, methyl phenyl vinyl silicone rubber raw rubber, phenolic resin, silica, and antibacterial and antiviral agent are mixed; then, dicumyl peroxide is added in the later stage of mixing for vulcanization; finally, antibacterial and antiviral rubber is obtained through calendering and extrusion molding processes.

[0088] The mixing temperature is 50℃ and the mixing time is 40 min; the vulcanization temperature is 140℃ and the vulcanization time is 7 min.

[0089] Application Example 2

[0090] Application Example 2 provides an antibacterial and antiviral rubber, which, by weight, comprises: 70 parts silicone rubber, 4 parts softener, 40 parts reinforcing agent, 3 parts antibacterial and antiviral agent, and 1 part vulcanizing agent.

[0091] The silicone rubber is methyl vinyl silicone rubber and methyl phenyl vinyl silicone rubber; the methyl vinyl silicone rubber was purchased from Zhejiang Hengyecheng Organosilicon Co., Ltd., model: 110-1; the methyl phenyl vinyl silicone rubber was purchased from Anhui Aiyota Silicone Oil Co., Ltd., model: IOTA120.

[0092] The weight ratio of the methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber, and antibacterial and antiviral agent is 50:20:1.

[0093] The softener is a phenolic resin, purchased from Wuxi Xinyehao Chemical Co., Ltd., model number: 2123.

[0094] The reinforcing agent is silica, purchased from Changtai Micro-Nano Chemical Plant in Shouguang City, Shandong Province, model: CT-30. The antibacterial and antiviral agent is the antibacterial and antiviral agent prepared in Example 2.

[0095] The vulcanizing agent is dicumyl peroxide (CAS No.: 80-43-3).

[0096] The preparation of antibacterial and antiviral rubber includes the following steps: first, methyl vinyl silicone rubber raw rubber, methyl phenyl vinyl silicone rubber raw rubber, phenolic resin, silica, and antibacterial and antiviral agent are mixed; then, dicumyl peroxide is added in the later stage of mixing for vulcanization; finally, antibacterial and antiviral rubber is obtained through calendering and extrusion molding processes.

[0097] The mixing temperature is 50℃ and the mixing time is 40 min; the vulcanization temperature is 140℃ and the vulcanization time is 7 min.

[0098] Application Example 3

[0099] Application Example 3 provides an antibacterial and antiviral rubber, the specific implementation of which is the same as that of Application Example 1, except that the antibacterial and antiviral agent is the antibacterial and antiviral agent prepared in Example 3.

[0100] Application Example 4

[0101] Application Example 4 provides an antibacterial and antiviral rubber, the specific implementation of which is the same as that of Application Example 1, except that the antibacterial and antiviral agent is the antibacterial and antiviral agent prepared in Example 4.

[0102] Application Example 5

[0103] Application Example 5 provides an antibacterial and antiviral rubber, the specific implementation of which is the same as that of Application Example 1, except that the antibacterial and antiviral agent is the antibacterial and antiviral agent prepared in Example 5.

[0104] Application Example 6

[0105] Application Example 6 provides an antibacterial and antiviral rubber, the specific implementation of which is the same as that of Application Example 1, except that the antibacterial and antiviral agent is the antibacterial and antiviral agent prepared in Example 6.

[0106] Application Example 7

[0107] Application Example 7 provides an antibacterial and antiviral rubber, the specific implementation of which is the same as that of Application Example 1, except that the antibacterial and antiviral agent is the antibacterial and antiviral agent prepared in Example 7.

[0108] Application Example 8

[0109] Application Example 8 provides an antibacterial and antiviral rubber, the specific implementation of which is the same as that of Application Example 1, except that the weight ratio of methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber and antibacterial and antiviral agent is 20:50:1.

[0110] Application Example 9

[0111] Application Example 9 provides an antibacterial and antiviral plastic, the raw materials of which, by weight, include: 95 parts of matrix resin and 10 parts of antibacterial and antiviral masterbatch; the antibacterial and antiviral masterbatch, by weight, includes: 100 parts of matrix resin, 2 parts of antibacterial and antiviral agent, and 8 parts of dispersant.

[0112] The matrix resin is Qatar Petrochemical Q50100 polyethylene resin, purchased from Dongguan Shenghao Plastic Raw Materials Co., Ltd.

[0113] The antibacterial and antiviral agent is the same as the one prepared in Exercise 1.

[0114] The dispersant is oxidized polyethylene wax, purchased from Comino New Material Technology (Zhejiang) Co., Ltd.

[0115] The preparation of antibacterial and antiviral plastics includes the following steps: (1) Preparation of antibacterial and antiviral masterbatch: after mixing polyethylene resin, antibacterial and antiviral agent and oxidized polyethylene wax evenly, the mixture is fed into a twin-screw extruder through the feed port and extruded and granulated by the twin-screw extruder to obtain antibacterial and antiviral masterbatch;

[0116] The parameters of the twin-screw extruder are set as follows: Zone 1 150℃, Zone 2 160℃, Zone 3 170℃, Zone 4 180℃, Zone 5 180℃, Zone 6 185℃, Zone 7 190℃, Zone 8 190℃, and Zone 9 200℃.

[0117] (2) Preparation of antibacterial and antiviral plastics: Antibacterial and antiviral masterbatch is added to polyethylene resin and mixed evenly by a high-speed mixer to obtain a mixture; the mixture is then subjected to injection molding process to obtain antibacterial and antiviral plastics.

[0118] Application Example 10

[0119] Application Example 10 provides an antibacterial and antiviral plastic, the raw materials of which, by weight, include: 95 parts of matrix resin and 10 parts of antibacterial and antiviral masterbatch; the antibacterial and antiviral masterbatch, by weight, includes: 100 parts of matrix resin, 2 parts of antibacterial and antiviral agent, and 8 parts of dispersant.

[0120] The matrix resin is PET (polyethylene terephthalate) resin, purchased from Dongguan Yihe Plastics Import & Export Co., Ltd., model: YS-W01.

[0121] The antibacterial and antiviral agent is the same as the one prepared in Exercise 1.

[0122] The dispersant is oxidized polyethylene wax, purchased from Comino New Material Technology (Zhejiang) Co., Ltd.

[0123] The preparation of antibacterial and antiviral plastics includes the following steps: (1) PET resin, antibacterial and antiviral agent, and oxidized polyethylene wax are mixed evenly and fed into a twin-screw extruder through a feeding port. The mixture is then extruded and granulated by the twin-screw extruder to obtain antibacterial and antiviral masterbatch.

[0124] The parameters of the twin-screw extruder are set as follows: Zone 1 205℃, Zone 2 215℃, Zone 3 225℃, Zone 4 235℃, Zone 5 250℃, Zone 6 250℃, Zone 7 260℃, Zone 8 260℃, and Zone 9 270℃.

[0125] (2) Preparation of antibacterial and antiviral plastics: Antibacterial and antiviral masterbatch is added to PET resin and mixed evenly by high-speed mixer to obtain a mixture; the mixture is then subjected to injection molding process to obtain antibacterial and antiviral plastics.

[0126] Performance testing methods

[0127] 1. Antibacterial properties: Application examples 1-10 were tested according to GB / T31402-2015 standard, and the results are recorded in Table 1.

[0128] 2. Antiviral activity: Application Examples 1-10 were tested according to ISO21702:2019(E) standard, and the results are recorded in Table 1.

[0129] 3. Anti-mildew properties: Application examples 1-10 were tested according to GB / T24128-2018 standard, and the results are recorded in Table 1.

[0130] 4. Long-lasting effect: Application examples 1-10 were tested according to the JC / T939-2004 standard. The samples were soaked in a distilled water bath at a temperature of (50±2)℃ for 16 hours and then subjected to antibacterial test. The results are recorded in Table 1.

[0131] 5. Tensile strength: Application Examples 1-8 were tested according to GB / T 528-2009 standard; Application Examples 9-10 were tested according to GB / T1040.1-2018 standard. The results are recorded in Table 1.

[0132] Test Results

[0133] Table 1:

[0134]

[0135]

[0136] Application Example 1 was tested for antibacterial properties according to GB / T31402-2015 standard. The contact time between the test sample and bacteria was changed to 1 hour, and the antibacterial rate against both *Escherichia coli* and *Staphylococcus aureus* was found to be 99.9%. Application Example 1 was also tested for antiviral properties according to ISO21702:2019(E) standard. The contact time between the test sample and virus was changed to 1 hour, and the antiviral rate against influenza A (H1N1) was found to be 99.6%. These findings demonstrate that the antibacterial and antiviral agent prepared according to this invention has rapid antibacterial and antiviral effects.

Claims

1. An antibacterial and antiviral agent, characterized in that, By weight, the raw materials include: 10-60 parts of inorganic antibacterial agent, 10-30 parts of organic antibacterial agent, 1-5 parts of coupling agent, and 10-50 parts of solvent; the inorganic antibacterial agent includes inorganic antibacterial agent A and inorganic antibacterial agent B; The inorganic antibacterial agent A is silver-loaded silicon dioxide; the inorganic antibacterial agent B is nano-copper oxide and nano-zinc oxide; The weight ratio of the silver-loaded silicon dioxide, nano-copper oxide, and nano-zinc oxide is 2:1:1 or 2:2:1; The organic antibacterial agent is n-butyl-1,2-benzisothiazolin-3-one; The weight ratio of the inorganic antibacterial agent to the organic antibacterial agent is 2.5:1 or 1.5:1; The coupling agent is isopropyl dioleoyloxytitanate.

2. A method for preparing an antibacterial and antiviral agent according to claim 1, characterized in that, Includes the following steps: (1) Disperse the coupling agent in 1 / 2 or 1 / 3 of the weight of the solvent to prepare a coupling agent solution. Add inorganic antibacterial agent A and inorganic antibacterial agent B to the coupling agent solution for modification treatment. After filtration, washing and drying, a modified inorganic antibacterial agent mixture is obtained. (2) Disperse the modified inorganic antibacterial agent mixture in the remaining solvent, add the organic antibacterial agent, and after the reaction is completed, filter, wash and dry to obtain the antibacterial and antiviral agent.

3. The application of the antibacterial and antiviral agent according to claim 1 in rubber materials.

4. The application of the antibacterial and antiviral agent according to claim 3 in rubber materials, characterized in that, By weight, it is used in antibacterial and antiviral rubber; The raw materials for preparing the antibacterial and antiviral rubber include: 60-80 parts of silicone rubber, 2-6 parts of softener, 35-50 parts of reinforcing agent, 0.1-5 parts of antibacterial and antiviral agent, and 0.1-2 parts of vulcanizing agent.

5. The application of the antibacterial and antiviral agent according to claim 1 in plastic materials.

6. The application of the antibacterial and antiviral agent according to claim 5 in plastic materials, characterized in that, By weight, it is used in antibacterial and antiviral plastics; The raw materials for preparing the antibacterial and antiviral plastic include: 90-99 parts of matrix resin and 2-15 parts of antibacterial and antiviral masterbatch; the antibacterial and antiviral masterbatch, by weight, includes: 90-110 parts of matrix resin, 1-30 parts of antibacterial and antiviral agent, and 1-10 parts of dispersant.

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