A kind of fabric disinfection and antibacterial finishing liquid and preparation method thereof

Abstract

The present invention provides a fabric disinfection and antibacterial finishing liquid and a preparation method thereof, and belongs to the technical field of disinfection and antibacterial. The fabric disinfection and antibacterial finishing liquid provided by the present invention has an ultra-high dilution ratio, and can be directly added to a washing machine for application; the fabric treated with the fabric disinfection and antibacterial finishing liquid can be continuously and long-lastingly antibacterial, and can still meet the fabric antibacterial and deodorization requirements after washing 10 times; at the same time, it has the advantages of broad-spectrum disinfection and sterilization, low application cost, environmental protection, safety, etc., and can be widely used in homes, schools, hotels and other places.

Description

Technical Field

[0001] The invention belongs to the technical field of disinfection and antibacterial treatment, and in particular relates to a disinfection and antibacterial finishing liquid for fabrics and a preparation method thereof. Background Art

[0002] The main disinfectants currently used are alcohol disinfectants, chlorine-containing disinfectants, peroxide disinfectants, aldehyde disinfectants, iodine disinfectants, phenol disinfectants, quaternary ammonium disinfectants and guanidine disinfectants. Comparison and analysis of these disinfectants show that these disinfectants have their own advantages and disadvantages. For example, alcohol disinfectants are flammable and explosive, and are highly dangerous to use and store; chlorine-containing disinfectants and peroxide disinfectants are highly corrosive to metals and have bleaching properties; aldehyde disinfectants, iodine disinfectants and phenol disinfectants have large toxic side effects, and their residues have a great impact on the environment; quaternary ammonium salts and organic guanidine disinfectants are stable, non-flammable, non-explosive, basically non-corrosive to metals, non-bleaching, safe, and have little impact on the ecological environment, but their bactericidal ability is weak and the concentration used is high.

[0003] The Chinese patent application with publication number CN111418587A discloses a highly effective household fabric disinfectant, which comprises at least the following components by weight: 10-30 parts of quaternary ammonium salt compounds, 5-20 parts of polyhexamethylene guanidine compounds, 5-15 parts of moisturizers, 1-10 parts of emulsifiers, 1-5 parts of antibacterial agents, and 50-100 parts of water. The household fabric disinfectant has a broad spectrum of sterilization, has good sterilization and disinfection effects on fungi, bacteria, etc., has a fast sterilization speed, and the bacteria will not develop drug resistance, and the disinfection is thorough; it is highly safe, non-toxic, has no residue, and is easy to use. However, on the one hand, the household fabric disinfectant has a high concentration and a low dilution ratio, and it is difficult to meet the requirements of composite machine washing; on the other hand, after the household fabric disinfectant disinfects the fabric, it does not have a continuous and long-lasting antibacterial and deodorizing function.

[0004] In order to solve the above problems, it is urgent to develop a fabric disinfection and antibacterial finishing liquid that not only has a high dilution ratio but also has continuous and long-lasting antibacterial and deodorizing functions. Summary of the invention

[0005] The object of the present invention is to provide a fabric disinfecting and antibacterial finishing liquid and a preparation method thereof.

[0006] The invention provides a disinfectant and antibacterial liquid, which comprises the following components: 2wt.%-6wt.% of polyhexamethylene guanidine substances, 1wt.%-4wt.% of double-chain quaternary ammonium salts, 0.1wt.%-2wt.% of boric acid synergists, 0.5wt.%-20wt.% of cosolvents, and the remainder is water.

[0007] Furthermore, the disinfectant and antibacterial liquid contains the following ingredients: 4 wt.%, of polyhexamethylene guanidine, 2.5 wt.%, of double-chain quaternary ammonium salt, 1 wt.%, of boric acid enhancer, 10 wt.%, of cosolvent, and the rest is water.

[0008] Furthermore, the polyhexamethylene guanidine substance is selected from one or a mixture of two or more of polyhexamethylene biguanide or its hydrochloride, polyhexamethylene monoguanide or its hydrochloride, polyhexamethylene monoguanide or its phosphate, and polyhexamethylene biguanide or its phosphate.

[0009] Furthermore, the molecular weight of the polyhexamethyleneguanidine substance is 2000-30000.

[0010] Furthermore, the double-chain quaternary ammonium salt is selected from one or a mixture of two or more quaternary ammonium salts such as chlorided dialkyl dimethyl quaternary ammonium salt, brominated dialkyl dimethyl quaternary ammonium salt, methyl sulfated dialkyl dimethyl quaternary ammonium salt, and peroxidized benzyl alkyl dimethyl quaternary ammonium salt.

[0011] Furthermore, the boric acid synergist is selected from one or a mixture of two or more of borax, boric acid, sodium tetraborate, sodium borate decahydrate.

[0012] Furthermore, the co-solvent is selected from one or a mixture of two or more of ethanol, ethylene glycol, propylene glycol, pentanediol, hexylene glycol, demerol, isopropanol, glycerol, polyethylene glycol, and p-hydroxyacetophenone.

[0013] The present invention also provides a method for preparing the above disinfectant and antibacterial liquid, which comprises the following steps: uniformly mixing polyhexamethylene guanidine substances, double-chain quaternary ammonium salts, boric acid enhancers, cosolvents and water, adjusting the pH value to 5.5-8.0, filtering and obtaining the disinfectant and antibacterial liquid.

[0014] Furthermore, the pH value is 5.5-6.5.

[0015] The present invention also provides the use of the disinfectant and antibacterial liquid in preparing a disinfectant and antibacterial finishing liquid for fabrics.

[0016] The present invention also provides a fabric with long-lasting antibacterial and anti-odor functions, which is obtained by treating the fabric with the above disinfection and antibacterial liquid.

[0017] The present invention adopts the principle of compound synergism, and polyhexamethylene guanidine substances and double-chain quaternary ammonium salts are compounded into disinfection finishing liquid, ionization is generated in aqueous solution, and the hydrophilic group part has strong positive charge, which can adsorb various bacteria and viruses that are usually negatively charged, and further utilizes the cell penetration of boric acid substances, and under the coordinated use of auxiliary agents such as solvents and cosolvents, the finishing liquid of the present invention has good dispersion and osmotic effect, promotes the positive charge of polyhexamethylene guanidine substances and double-chain quaternary ammonium salts to enter the cell membrane, inhibits the synthesis of liposomes in the membrane, and reaches a low usage amount, 100-200ppm can achieve a broad-spectrum disinfection effect, thereby giving the disinfectant an ultra-high dilution ratio, which can be diluted 300-800 times, meeting the application requirements of the composite washing machine. Based on a domestic 8-kilogram drum washing machine, the water consumption is about 15 liters, and the disinfectant consumption is 20-50ml; the common disinfectant dilution ratio is 50-150 times, such as the parachloro-meta-xylenol disinfectant needs to add about 300ml when it is equally used in a washing machine. During the washing process, considering various factors such as washing and rinsing, an empirical value is that the recommended amount of additives should not exceed 0.3%, and generally should not be higher than 0.5%.

[0018] In addition, while disinfecting, the polyhexamethylene guanidine substances in the finishing liquid of the present invention can be electrostatically adsorbed on the fabric fibers, so that the fabric has long-lasting antibacterial and deodorizing capabilities, and after washing 10 times, the antibacterial rate against Escherichia coli and Staphylococcus aureus is greater than 95%, and the generation of fabric odor can be effectively reduced.

[0019] The fabric disinfection and antibacterial finishing liquid provided by the present invention has an ultra-high dilution ratio and can be directly added to a washing machine. The fabric treated with the fabric disinfection and antibacterial finishing liquid can have a continuous and long-lasting antibacterial effect, and can still meet the fabric antibacterial and deodorizing requirements after being washed 10 times. The fabric disinfection and antibacterial finishing liquid has the advantages of broad-spectrum disinfection and sterilization, low application cost, environmental protection, safety, etc. When the fabric is automatically washed in a washing machine, not only can the disinfection problem be achieved at the same time, but the fabric can also be antibacterial finished, giving the fabric a long-lasting antibacterial and anti-odor ability, and can be widely used in homes, schools, hotels, and other places.

[0020] Obviously, according to the above contents of the present invention, in accordance with common technical knowledge and customary means in the art, without departing from the above basic technical ideas of the present invention, other various forms of modification, replacement or change may be made.

[0021] The above contents of the present invention are further described in detail below through specific implementation methods in the form of embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following examples. All technologies realized based on the above contents of the present invention belong to the scope of the present invention. DETAILED DESCRIPTION

[0022] Unless otherwise specified, the raw materials and equipment used in the present invention are all known products, which are obtained by purchasing commercially available products.

[0023] The CAS number of the polyhexamethylene biguanide used in the embodiment of the present invention is 32289-58-0, and the molecular weight is 2000-20000;

[0024] The CAS number of polyhexamethylene guanidine is 31961-54-3, and the molecular weight is 5000-30000;

[0025] The CAS number of dialkyldimethyl quaternary ammonium salt of chloride is 7173-51-5;

[0026] The CAS number of dialkyldimethyl quaternary ammonium bromide is 8001-54-5;

[0027] The CAS number of methyl sulfate dialkyl dimethyl quaternary ammonium salt is 61789-81-9;

[0028] The CAS number of benzyl alkyl dimethyl quaternary ammonium peroxide is 27479-28-3;

[0029] Polyethylene glycol 200 refers to polyethylene glycol with a molecular weight of 200;

[0030] Borax refers to sodium tetraborate decahydrate.

[0031] Example 1: Preparation of fabric disinfection and antibacterial finishing liquid

[0032] The components of the fabric disinfection and antibacterial finishing liquid are: 4 wt.% of polyhexamethylene biguanide, 2.5 wt.% of dialkyl dimethyl quaternary ammonium salt of chloride, 1 wt.% of borax, 5 wt.% of propylene glycol, 5 wt.% of polyethylene glycol 200, and the rest is water.

[0033] Preparation method: add water, polyhexamethylene biguanide, dialkyl dimethyl quaternary ammonium chloride, borax, propylene glycol and polyethylene glycol 200 in proportion and stir, adjust the pH value to 5.5-6.5 after they are completely dissolved and uniform, filter and obtain the fabric disinfection and antibacterial finishing liquid.

[0034] Example 2: Preparation of fabric disinfection and antibacterial finishing liquid

[0035] The components of the fabric disinfection and antibacterial finishing liquid are: 3.5 wt.% of polyhexamethylene monoguanidine, 2.0 wt.% of dialkyl dimethyl quaternary ammonium salt of chloride, 0.5 wt.% of boric acid, 10 wt.% of isopropyl alcohol, 5 wt.% of polyethylene glycol 200, and the rest is water.

[0036] Preparation method: add water, polyhexamethylene guanidine, dialkyl dimethyl quaternary ammonium chloride, boric acid, propylene glycol and polyethylene glycol 200 in proportion and stir, adjust the pH value to 5.5-6.5 after they are completely dissolved and uniform, filter and obtain the fabric disinfection and antibacterial finishing liquid.

[0037] Example 3: Preparation of fabric disinfection and antibacterial finishing liquid

[0038] The components of the fabric disinfection and antibacterial finishing liquid are: 6wt.% of polyhexamethylene monoguanidine, 3.5wt.% of brominated dialkyl dimethyl quaternary ammonium salt, 1.2wt.% of borax, 5wt.% of propylene glycol, 15wt.% of isopropyl alcohol, and the rest is water.

[0039] Preparation method: add water, polyhexamethylene guanidine, brominated dialkyl dimethyl quaternary ammonium salt, borax, propylene glycol and isopropanol in proportion and stir until they are completely dissolved and uniform, adjust the pH value to 5.5-6.5, filter and obtain the fabric disinfection and antibacterial finishing liquid.

[0040] Example 4: Preparation of fabric disinfection and antibacterial finishing liquid

[0041] The components of the fabric disinfection and antibacterial finishing liquid are: 4wt.% of polyhexamethylene monoguanidine, 2.5wt.% of methylsulfate-esterified dialkyl dimethyl quaternary ammonium salt, 1wt.% of borax, 20wt.% of propylene glycol, and the rest is water.

[0042] Preparation method: add water, polyhexamethylene guanidine, dialkyl dimethyl quaternary ammonium salt methyl sulfate, borax and propylene glycol in proportion and stir until they are completely dissolved and uniform, adjust the pH value to 5.5-6.5, filter and obtain the fabric disinfection and antibacterial finishing liquid.

[0043] Example 5: Preparation of fabric disinfection and antibacterial finishing liquid

[0044] The components of the fabric disinfection and antibacterial finishing liquid are: 2 wt.% of polyhexamethylene monoguanidine, 2 wt.% of methylsulfate-esterified dialkyl dimethyl quaternary ammonium salt, 0.5 wt.% of boric acid, 3 wt.% of propylene glycol, and the rest is water.

[0045] Preparation method: add water, polyhexamethylene guanidine, dialkyl dimethyl quaternary ammonium salt methyl sulfate, boric acid and propylene glycol in proportion and stir until they are completely dissolved and uniform, adjust the pH value to 5.5-6.5, filter and obtain the fabric disinfection and antibacterial finishing liquid.

[0046] Example 6: Preparation of fabric disinfection and antibacterial finishing liquid

[0047] The components of the fabric disinfection and antibacterial finishing liquid are: 4.5 wt.% of polyhexamethylene monoguanidine, 3 wt.% of peroxidized benzyl alkyl dimethyl quaternary ammonium salt, 1 wt.% of boric acid, 5 wt.% of ethanol, 5 wt.% of polyethylene glycol 200, and the rest of water.

[0048] Preparation method: water, polyhexamethylene guanidine, benzyl alkyl dimethyl quaternary ammonium peroxide, boric acid, ethanol and polyethylene glycol 200 are added in proportion and stirred, and after they are completely dissolved and uniform, the pH value is adjusted to 5.5-6.5, and filtered to obtain a fabric disinfection and antibacterial finishing liquid.

[0049] The beneficial effects of the present invention are demonstrated by experimental examples below.

[0050] Experimental Example 1: Disinfection and Sterilization Performance Test

[0051] 1. Experimental Methods

[0052] The textile disinfection and antibacterial finishing liquids prepared in Examples 1-6 were diluted with water at a ratio of 1:300 to 800, and then subjected to a suspension quantitative bactericidal test according to 2.1.1.7.4 of the 2002 edition of the Technical Specification for Disinfection. The action time was 15 minutes, and the test strains were: Staphylococcus aureus ATCC 6538, Escherichia coli 8099, and Candida albicans ATCC 10231.

[0053] 2. Experimental results

[0054] Table 1. Bactericidal performance test results

[0055]

[0056] The results show that the fabric disinfection and antibacterial finishing liquid of the present invention still has excellent bactericidal performance after being diluted 300 to 800 times.

[0057] Experimental Example 2: Antibacterial Performance Test

[0058] 1. Experimental Methods

[0059] The fabric disinfection and antibacterial finishing liquids obtained in Examples 1-6 were respectively used to prepare samples using a washing machine.

[0060] Take 1 piece of 105g / m 2 Pure cotton knitted fabric (weight 100g) and 3kg of accompanying fabric were placed in a drum washing machine. The washing machine used 15L of water for one wash. The fabric disinfection and antibacterial finishing liquids prepared in Examples 1-6 were added to the softener grid of the washing machine according to the dilution multiple in Table 1 (the water volume was calculated as 15L). The conventional washing procedure was used. After washing, the knitted fabric was taken out and dried to obtain antibacterial fabrics 1# to 6#.

[0061] In accordance with the provisions of the National Standard of the People's Republic of China GB8629-2001 "Household Washing and Drying Procedures for Textile Testing", a type B agitator washing machine and washing procedure 8B were selected to wash 1# to 6# antibacterial cloths and untreated pure cotton knitted fabrics, respectively. Each sample was washed 10 times, and the antibacterial properties of the samples after washing were measured.

[0062] According to GB / T 20944.2-2007 "Evaluation of antibacterial properties of textiles Part 2: Absorption method", 1#~6# antibacterial fabrics and untreated pure cotton knitted fabrics were tested for unwashed antibacterial properties. The test strains were: Staphylococcus aureus ATCC 6538, Escherichia coli 8099, and Candida albicans ATCC10231.

[0063] 2. Experimental results

[0064] Table 2. Antibacterial performance test results before and after washing

[0065]

[0066] It can be seen from Table 2 that, compared with the untreated pure cotton knitted fabric, the antibacterial fabric treated with the fabric disinfection and antibacterial finishing liquid of the present invention has a more excellent antibacterial effect.

[0067] Furthermore, the antibacterial cloth treated with the fabric disinfection and antibacterial finishing liquid of the present invention has a long-lasting antibacterial ability, and after being washed 10 times, the antibacterial rate against Staphylococcus aureus and Escherichia coli is greater than 95%, and can achieve Class A antibacterial washability.

[0068] Experimental Example 3: Deodorization Performance Test

[0069] 1. Experimental Methods

[0070] Take the fabric (1# antibacterial cloth) treated with the fabric disinfection and antibacterial finishing liquid of Example 1 of the present invention and the untreated pure cotton knitted fabric, add an equal amount of Staphylococcus aureus ATCC 6538 bacterial suspension, put them in a sealed bottle, seal them, and place them at 37°C for 24 hours. The concentration of isovaleric acid in the sealed bottle was detected according to GB / T 33610.3-2019 "Determination of deodorizing properties of textiles Part 3: Gas chromatography".

[0071] 2. Experimental results

[0072] Table 3. Deodorization performance test results

[0073]

[0074] It can be seen from Table 3 that, compared with the untreated pure cotton knitted fabric, the antibacterial fabric treated with the fabric disinfection and antibacterial finishing liquid of the present invention has a more excellent deodorizing effect.

[0075] Furthermore, the antibacterial cloth treated with the fabric disinfection and antibacterial finishing liquid of the present invention has a long-lasting deodorizing ability and can still effectively reduce the generation of fabric odor after being washed 10 times.

[0076] Experimental Example 4: Safety Test

[0077] (1) Antimicrobial dissolution test

[0078] The fabric (1# antibacterial cloth) treated with the fabric disinfection and antibacterial finishing liquid of Example 1 of the present invention was taken, and the solubility of antibacterial substances was tested according to GB / T31713-2015 "Safety and Hygiene Requirements for Antibacterial Textiles", and the test strains were: Staphylococcus aureus ATCC 6538, Escherichia coli 8099, and Candida albicans ATCC10231.

[0079] Table 4. Antimicrobial dissolution test results

[0080]

[0081]

[0082] According to Table 4, the antibacterial cloth treated with the fabric disinfection and antibacterial finishing liquid of the present invention has an inhibition zone width D of less than 5 mm for Staphylococcus aureus ATCC 6538, Escherichia coli 8099, and Candida albicans ATCC 10231, which is slightly soluble and meets the antibacterial substance solubility requirements in the safety and sanitation requirements of GB / T 31713-2015 "Safety and Sanitation Requirements for Antibacterial Textiles".

[0083] (2) Acute oral toxicity test

[0084] The disinfectant and antibacterial finishing liquid prepared in Example 1 of the present invention was subjected to an acute oral toxicity test and evaluation according to Section 2.3.1 of Part 2 of the 2002 edition of the Technical Specification for Disinfection, and was found to be practically non-toxic.

[0085] (3) One-time complete skin irritation test

[0086] The disinfectant and antibacterial finishing liquid prepared in Example 1 of the present invention was subjected to a one-time complete skin irritation test according to Section 2.3.3 of Part 2 of the 2002 edition of the Technical Specification for Disinfection, and was evaluated to be non-irritating.

[0087] The test results show that the fabric disinfection and antibacterial finishing liquid prepared by the present invention can achieve excellent sterilization effect even at ultra-low application concentration, has good safety performance, is practically non-toxic and non-irritating, can be effectively mixed with laundry detergent, and is convenient.

Claims

1. Use of a disinfectant and antibacterial liquid in preparing a fabric with long-lasting antibacterial and long-lasting deodorizing functions, characterized in that: The fabric is obtained by treating the fabric with a disinfectant and antibacterial liquid, wherein the disinfectant and antibacterial liquid comprises the following components: 4 wt.% of polyhexamethylene biguanide, 2.5 wt.% of dialkyl dimethyl quaternary ammonium salt of chloride, 1 wt.% of borax, 10 wt.% of a solvent, and the remainder is water; the solvent is a mixture of propylene glycol and polyethylene glycol.

2. The use according to claim 1, characterized in that: The molecular weight of the polyhexamethylene biguanide is 2000-30000.

3. The use according to any one of claims 1-2, characterized in that: The preparation method of the disinfectant and antibacterial liquid comprises the following steps: uniformly mixing polyhexamethylene biguanide, dialkyl dimethyl quaternary ammonium chloride, borax, a cosolvent and water, adjusting the pH value to 5.5-8.0, filtering and obtaining the disinfectant and antibacterial liquid.

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