A lubricant based on peracetic acid and preparation method thereof

Abstract

The invention relates to the technical field of lubricant preparation, and in particular to a peracetic acid-based lubricant and a preparation method thereof. The lubricant is prepared from an agent A, an agent B and an agent C in a mass ratio of 10-15:10-12:45-50. The invention uses benzotriazole and polyaspartic acid as corrosion inhibitors, and mixes the agent A, the agent B and the agent C in a specific ratio, wherein the benzotriazole can quickly migrate to a metal surface to avoid corrosion, and during use, the polyaspartic acid competes with the benzotriazole metal surface for adsorption, gradually replacing the benzotriazole, thereby reducing the residual amount of the benzotriazole on the metal surface. In addition, since the polyaspartic acid has low toxicity and high safety, the safety hazard can also be reduced to a certain extent, and finally a lubricant with good stability, high lubricity, low foam residue and capable of sterilization is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of lubricant preparation, and in particular to a lubricant based on peracetic acid and a preparation method thereof. Background Art

[0002] After repeated use, cleaning and disinfection, medical devices will suffer varying degrees of damage. The chrome plating on the surface is prone to rust, which greatly shortens the service life of the device and is not conducive to reducing medical costs. Generally, reasonable maintenance methods can extend the service life of medical devices, reduce the impact of rust on the device, and delay the damage of the device.

[0003] A general maintenance method for medical devices is to wipe the surface of the device with liquid paraffin. The principle is that liquid paraffin and water are immiscible. However, this method strictly requires that the liquid paraffin must be used to wipe the medical device thoroughly. In addition, since wiping the surface of the device requires a lot of manpower and time, water-soluble lubricants are generally selected in the prior art for daily maintenance and upkeep of medical devices.

[0004] Peracetic acid is a peroxide, which is widely used in the fields of medical treatment and food. It is often used for the maintenance of medical equipment and pipeline tanks. Peracetic acid has strong oxidizing ability and can effectively kill various microorganisms and their propagules. It has the advantages of being cheap, broad-spectrum, fast, efficient, and having non-toxic and residue-free decomposition products. Peracetic acid works because its main active ingredient, peracetic acid molecules, can slowly decompose and release highly reactive oxygen free radicals, which play a role in disinfection and sterilization. As an organic acid, peracetic acid generally has the problem of strong corrosiveness during use. It has strong corrosiveness to metals and the surfaces of objects to be disinfected, and can easily cause irreversible corrosion damage to expensive medical equipment and endoscopes, which cannot meet the requirements of disinfectants in the medical industry. To address this problem, the prior art designs a binary peracetic acid disinfectant, and adds a corrosion inhibitor to one of the agents to slow down the corrosion of peracetic acid on the metal surface. For example, patent technology document CN101810171B discloses an environmentally friendly and corrosion-resistant peracetic acid. Disinfectant, this invention uses a quaternary ammonium salt corrosion inhibitor to slow down the contact between peracetic acid and the metal surface by adsorbing the quaternary ammonium salt on the metal surface, thereby reducing the corrosion efficiency. However, the quaternary ammonium salt is easily oxidized and degraded during storage, and the residual ionic surfactant on the metal surface will cause electrochemical corrosion and accelerate the oxidation of medical devices. Patent technical document CN114081031A discloses a low-temperature peracetic acid disinfectant. This invention uses a composition of phytic acid, pentaerythritol, benzotriazole and siloxane ketone as a corrosion inhibitor. Benzotriazole is adsorbed on the metal surface to form a protective film to inhibit corrosion. However, benzotriazole is highly toxic, and its residue on medical devices poses a safety hazard and environmental hazard.

[0005] Therefore, according to the above-mentioned related technologies, there is an urgent need to develop a peracetic acid-based lubricant and a preparation method thereof for lubricating medical devices and effectively preventing their corrosion. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a lubricant based on peracetic acid and a preparation method thereof, so as to solve the problem in the prior art that lubricants may cause easy corrosion of medical devices.

[0007] Based on the above objectives, the present invention provides a peracetic acid-based lubricant and a preparation method thereof.

[0008] A peracetic acid-based lubricant, wherein the lubricant is prepared from agent A, agent B and agent C in a mass ratio of 10-15:10-12:45-50;

[0009] The agent A is prepared from the following raw materials: acetic acid, concentrated sulfuric acid, hydrogen peroxide, a composite stabilizer and deionized water;

[0010] The agent B is prepared from the following raw materials: a neutralizer, a corrosion inhibitor, a wetting agent and deionized water;

[0011] The corrosion inhibitor is obtained by mixing benzotriazole and polyaspartic acid in a mass ratio of 0.4-0.9:1.5-2;

[0012] The C agent is prepared from the following raw materials: water-soluble base oil, surfactant, additive, bactericide and deionized water.

[0013] Preferably, the preparation method of agent A is as follows:

[0014] Step A1. Slowly add concentrated sulfuric acid to acetic acid and stir at a speed of 60-120 r / min for 5-7 min to obtain a mixed solution A1;

[0015] Step A2. Add hydrogen peroxide and deionized water to the mixed solution A1, and stir at a speed of 60-120 r / min for 15-20 min to obtain a mixed solution A2;

[0016] Step A3. Heat the mixed solution A2, stir for 5-7 min every 4 h, raise the temperature to 45-47 ° C, maintain the temperature at 45-47 ° C, and keep warm for 22-24 h to obtain a mixed solution A3;

[0017] Step A4. Stop heating the mixed solution A3 and add the composite stabilizer, stirring at a speed of 60-120 r / min for 30-45 min to obtain Agent A.

[0018] Preferably, the mass ratio of acetic acid to concentrated sulfuric acid in step A1 is 15-18:0.5-1.5;

[0019] The acetic acid in step A1 is analytically pure acetic acid;

[0020] The concentrated sulfuric acid described in step A1 is analytical grade concentrated sulfuric acid;

[0021] The mass ratio of hydrogen peroxide, deionized water and mixed solution A1 in step A2 is 15.5-19.5:19-34:50-60;

[0022] The concentration of hydrogen peroxide in step A2 is 30%-35%;

[0023] Preferably, the mass ratio of the mixed solution A3 and the composite stabilizer in step A4 is 84.5-113.5:0.5-1.5;

[0024] The composite stabilizer in step A4 is any one of sodium pyrophosphate, disodium ethylenediaminetetraacetate, sodium gluconate, diethylenetriaminepenta(methylenephosphonic acid) and hydroxyethylidene diphosphonic acid.

[0025] Preferably, the preparation method of agent B is as follows:

[0026] Step B1. Add the neutralizing agent to deionized water and stir for 30-45 minutes until the solution is clear to obtain a mixed solution B1;

[0027] Step B2. Add the corrosion inhibitor to the mixed solution B1 and stir for 15-30 min until the solution becomes clear to obtain a mixed solution B2;

[0028] Step B3. Add the wetting agent to the mixed solution B2, stir for 15-30 minutes until the solution becomes clear, and obtain Agent B.

[0029] Preferably, the mass ratio of the neutralizing agent to deionized water in step B1 is 5-8:89-94;

[0030] The neutralizing agent is analytical pure sodium hydroxide;

[0031] The mass ratio of the corrosion inhibitor to the mixed solution B1 in step B2 is 1-3:93-102;

[0032] The mass ratio of the wetting agent to the mixed solution B2 in step B3 is 0.1-0.3:94-105;

[0033] The wetting agent in step B3 is a nonionic surfactant, and the nonionic surfactant is any one of AEO-7, AEO-9 and OP-10.

[0034] Preferably, the preparation method of the C agent is as follows:

[0035] Step C1. Disperse the fungicide in deionized water and mix well to obtain a mixed solution C1;

[0036] Step C2. adding the water-soluble base oil and the additives to the mixed solution C1, and mixing them evenly to obtain a mixed solution C2;

[0037] Step C3. Add a surfactant to the mixed solution C2, and stir at 50-55°C until it is completely dissolved to obtain Agent C.

[0038] Preferably, the mass ratio of the bactericide to deionized water in step C1 is 0.5-1:68-72;

[0039] The bactericide in step C1 is sodium dehydroacetate;

[0040] The mass ratio of the water-soluble base oil, the additive and the mixed liquid C1 in step C2 is 5-10:5-10:68-72;

[0041] The water-soluble base oil in step C2 is obtained by mixing stearic acid amide and castor oil in a mass ratio of 2.5-5:2.5-5;

[0042] The additive in step C2 is polypropylene glycol;

[0043] Preferably, the mass ratio of the mixed solution C2 and the surfactant in step C3 is 78-92:8-12;

[0044] The surfactant in step C3 is obtained by mixing lauryl alcohol polyoxyethylene ether and polyethylene glycol in a mass ratio of 6-8:2-4.

[0045] A method for preparing a lubricant based on peracetic acid comprises the following steps:

[0046] Mix Agent A, Agent B and Agent C, stir well to obtain a peracetic acid-based lubricant.

[0047] Beneficial effects of the present invention:

[0048] The present invention provides a lubricant based on peracetic acid and a preparation method thereof. The present invention can prepare a lubricant with good stability, high lubricity and low foam residue by mixing agent A, agent B and agent C in a specific ratio. The lubricant prepared by the method can also kill bacteria remaining on the surface of the instrument after lubricating the instrument.

[0049] The present invention uses benzotriazole and polyaspartic acid as corrosion inhibitors, wherein the benzotriazole molecule is small and has poor ability to associate with water molecules, and can quickly migrate to the metal surface when the lubricant is used to avoid corrosion. At the same time, since polyaspartic acid and the metal have many adsorption sites, polyaspartic acid and benzotriazole compete for adsorption on the metal surface during use, and gradually replace benzotriazole, thereby reducing the residual amount of benzotriazole on the metal surface. In addition, since polyaspartic acid has low toxicity and high safety, it can also reduce safety hazards to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0051] Figure 1 The upper and lower figures are respectively the state diagrams of the copper sheet after lubrication and maintenance in Example 1 of the present invention and Comparative Example 6;

[0052] Figure 2 The upper and lower figures are respectively the state diagrams of carbon steel after lubrication and maintenance in Example 1 of the present invention and Comparative Example 6;

[0053] Figure 3 The upper and lower figures are respectively the state diagrams of the aluminum sheet after lubrication and maintenance in Example 1 of the present invention and Comparative Example 6. DETAILED DESCRIPTION

[0054] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0055] Embodiment 1: A method for preparing a lubricant based on peracetic acid, comprising the following steps:

[0056] S1. Slowly add 0.5 g of analytically pure concentrated sulfuric acid to 15 g of analytically pure acetic acid and stir at a speed of 60 r / min for 5 min to obtain a mixed solution A1;

[0057] S2. 15.5 g of 30% hydrogen peroxide and 19 g of deionized water were added to 50 g of the mixed solution A1 and stirred at a speed of 60 r / min for 15 min to obtain a mixed solution A2;

[0058] S3. The mixed solution A2 was heated, stirred for 5 min every 4 h, heated to 45 ° C, and maintained at 45 ° C for 22 h to obtain a mixed solution A3;

[0059] S4. The mixture A3 was heated to stop, 0.5 g of sodium pyrophosphate was added to 84.5 g of the mixture A3, and stirred at a speed of 60 r / min for 30 min to obtain Agent A;

[0060] S5. Add 5 g of analytical grade sodium hydroxide to 89 g of deionized water and stir for 30 min until the solution is clear to obtain a mixed solution B1;

[0061] S6. 0.4 g of benzotriazole and 1.5 g of polyaspartic acid were mixed to obtain a corrosion inhibitor;

[0062] S7. Add 1 g of corrosion inhibitor to 93 g of mixed solution B1 and stir for 15 min until the solution becomes clear to obtain mixed solution B2;

[0063] S8. Add 0.1 g of AEO-7 to 94 g of mixed solution B2 and stir for 15 min until the solution becomes clear to obtain agent B;

[0064] S9. Disperse 0.5 g of sodium dehydroacetate in 68 g of deionized water and mix well to obtain a mixed solution C1;

[0065] S10. Mix 2.5 g of stearic acid amide and 2.5 g of castor oil to obtain a water-soluble base oil;

[0066] S11. 5 g of a water-soluble base oil and 5 g of polypropylene glycol were added to 68 g of the mixed solution C1 and mixed to obtain a mixed solution C2;

[0067] S12. 6 g of lauryl alcohol polyoxyethylene ether and 2 g of polyethylene glycol were mixed to obtain a surfactant;

[0068] S13. Add 8 g of surfactant to 78 g of the mixed solution C2 and stir at 50 ° C until completely dissolved to obtain Agent C;

[0069] S14. Mix 10 g of agent A, 10 g of agent B and 45 g of agent C, and stir evenly to obtain a lubricant based on peracetic acid.

[0070] Embodiment 2: A method for preparing a lubricant based on peracetic acid, comprising the following steps:

[0071] S1. Slowly add 0.7 g of analytically pure concentrated sulfuric acid to 16 g of analytically pure acetic acid and stir at a speed of 70 r / min for 5.5 min to obtain a mixed solution A1;

[0072] S2. 16.5 g of 31% hydrogen peroxide and 22 g of deionized water were added to 52 g of the mixed solution A1 and stirred at a speed of 70 r / min for 16 min to obtain a mixed solution A2;

[0073] S3. The mixed solution A2 was heated, stirred for 6 min every 4 h, heated to 46 ° C, and maintained at 46 ° C for 23 h to obtain a mixed solution A3;

[0074] S4. Stop heating the mixed solution A3, add 0.7 g of disodium ethylenediaminetetraacetate to 89 g of the mixed solution A3, and stir at a speed of 70 r / min for 33 min to obtain Agent A;

[0075] S5. Add 6 g of analytical grade sodium hydroxide to 90 g of deionized water and stir for 33 min until the solution is clear to obtain a mixed solution B1;

[0076] S6. 0.5 g of benzotriazole and 1.6 g of polyaspartic acid were mixed to obtain a corrosion inhibitor;

[0077] S7. Add 2 g of corrosion inhibitor to 95 g of mixed solution B1 and stir for 18 min until the solution becomes clear to obtain mixed solution B2;

[0078] S8. Add 0.2 g of AEO-9 to 97 g of mixed solution B2 and stir for 18 min until the solution becomes clear to obtain agent B;

[0079] S9. Disperse 0.6 g of sodium dehydroacetate in 69 g of deionized water and mix well to obtain a mixed solution C1;

[0080] S10. Mix 3 g of stearic acid amide and 3 g of castor oil to obtain a water-soluble base oil;

[0081] S11. 6 g of water-soluble base oil and 6 g of polypropylene glycol were added to 69 g of mixed solution C1 and mixed to obtain a mixed solution C2;

[0082] S12. 7 g of lauryl alcohol polyoxyethylene ether and 3 g of polyethylene glycol were mixed to obtain a surfactant;

[0083] S13. Add 9 g of surfactant to 82 g of the mixed solution C2 and stir at 51 ° C until completely dissolved to obtain Agent C;

[0084] S14. Mix 11 g of agent A, 11 g of agent B and 46 g of agent C, and stir evenly to obtain a lubricant based on peracetic acid.

[0085] Embodiment 3: A method for preparing a lubricant based on peracetic acid, comprising the following steps:

[0086] S1. Slowly add 0.9 g of analytically pure concentrated sulfuric acid to 18 g of analytically pure acetic acid and stir at a speed of 80 r / min for 6 min to obtain a mixed solution A1;

[0087] S2. 17.5 g of 32% hydrogen peroxide and 25 g of deionized water were added to 54 g of the mixed solution A1 and stirred at a speed of 80 r / min for 17 min to obtain a mixed solution A2;

[0088] S3. The mixed solution A2 was heated, stirred for 7 min every 4 h, heated to 47 ° C, and maintained at 47 ° C for 24 h to obtain a mixed solution A3;

[0089] S4. Stop heating the mixed solution A3, add 0.9 g of sodium gluconate to 92 g of the mixed solution A3, and stir at a speed of 80 r / min for 36 min to obtain Agent A;

[0090] S5. Add 7 g of analytical grade sodium hydroxide to 91 g of deionized water and stir for 36 min until the solution is clear to obtain a mixed solution B1;

[0091] S6. 0.6 g of benzotriazole and 1.7 g of polyaspartic acid were mixed to obtain a corrosion inhibitor;

[0092] S7. Add 3 g of corrosion inhibitor to 97 g of mixed solution B1 and stir for 20 min until the solution becomes clear to obtain mixed solution B2;

[0093] S8. Add 0.3 g OP-10 to 100 g of mixed solution B2 and stir for 20 min until the solution becomes clear to obtain agent B;

[0094] S9. Disperse 0.7 g of sodium dehydroacetate in 70 g of deionized water and mix well to obtain a mixed solution C1;

[0095] S10. 3.5 g of stearic acid amide and 3.5 g of castor oil were mixed to obtain a water-soluble base oil;

[0096] S11. 7 g of water-soluble base oil and 7 g of polypropylene glycol were added to 70 g of the mixed solution C1 and mixed to obtain a mixed solution C2;

[0097] S12. 8 g of lauryl alcohol polyoxyethylene ether and 4 g of polyethylene glycol were mixed to obtain a surfactant;

[0098] S13. Add 10 g of surfactant to 86 g of the mixed solution C2 and stir at 52 ° C until completely dissolved to obtain Agent C;

[0099] S14. Mix 12 g of agent A, 12 g of agent B and 47 g of agent C, and stir evenly to obtain a lubricant based on peracetic acid.

[0100] Embodiment 4: A method for preparing a lubricant based on peracetic acid, comprising the following steps:

[0101] S1. Slowly add 1.1 g of analytically pure concentrated sulfuric acid to 15.5 g of analytically pure acetic acid and stir at a speed of 100 r / min for 6.5 min to obtain a mixed solution A1;

[0102] S2. 18.5 g of 33% hydrogen peroxide and 28 g of deionized water were added to 56 g of the mixed solution A1 and stirred at a speed of 100 r / min for 18 min to obtain a mixed solution A2;

[0103] S3. The mixed solution A2 was heated, stirred for 5 min every 4 h, heated to 45 ° C, and maintained at 45 ° C for 22 h to obtain a mixed solution A3;

[0104] S4. The mixture A3 was heated to stop, 1.1 g of diethylenetriamine penta (methylenephosphonic acid) was added to 98 g of the mixture A3, and stirred at a speed of 100 r / min for 41 min to obtain Agent A;

[0105] S5. 8 g of analytical grade sodium hydroxide was added to 92 g of deionized water and stirred for 39 min until the solution was clear to obtain a mixed solution B1;

[0106] S6. 0.7 g of benzotriazole and 1.8 g of polyaspartic acid were mixed to obtain a corrosion inhibitor;

[0107] S7. Add 2.5 g of corrosion inhibitor to 99 g of mixed solution B1 and stir for 25 min until the solution becomes clear to obtain mixed solution B2;

[0108] S8. Add 0.15 g of AEO-7 to 102 g of mixed solution B2 and stir for 25 min until the solution becomes clear to obtain agent B;

[0109] S9. Disperse 0.8 g of sodium dehydroacetate in 71 g of deionized water and mix well to obtain a mixed solution C1;

[0110] S10. Mix 4 g of stearic acid amide and 4 g of castor oil to obtain a water-soluble base oil;

[0111] S11. 8 g of water-soluble base oil and 8 g of polypropylene glycol were added to 71 g of the mixed solution C1 and mixed to obtain a mixed solution C2;

[0112] S12. 6 g of lauryl alcohol polyoxyethylene ether and 2 g of polyethylene glycol were mixed to obtain a surfactant;

[0113] S13. Add 11 g of surfactant to 88 g of the mixed solution C2 and stir at 53 ° C until completely dissolved to obtain Agent C;

[0114] S14. Mix 13 g of agent A, 10.5 g of agent B and 48 g of agent C, and stir evenly to obtain a lubricant based on peracetic acid.

[0115] Embodiment 5: A method for preparing a lubricant based on peracetic acid, comprising the following steps:

[0116] S1. Slowly add 1.3 g of analytically pure concentrated sulfuric acid to 16.5 g of analytically pure acetic acid and stir at a speed of 110 r / min for 6 min to obtain a mixed solution A1;

[0117] S2. 19 g of 34% hydrogen peroxide and 32 g of deionized water were added to 58 g of the mixed solution A1 and stirred at a speed of 110 r / min for 19 min to obtain a mixed solution A2;

[0118] S3. The mixed solution A2 was heated, stirred for 6 min every 4 h, heated to 46 ° C, and maintained at 46 ° C for 23 h to obtain a mixed solution A3;

[0119] S4. Heating the mixed solution A3 was stopped, 1.3 g of diethylenetriamine penta (methylenephosphonic acid) was added to 105 g of the mixed solution A3, and stirred at a speed of 110 r / min for 43 min to obtain Agent A;

[0120] S5. Add 6.5 g of analytical grade sodium hydroxide to 93 g of deionized water and stir for 42 min until the solution is clear to obtain a mixed solution B1;

[0121] S6. 0.8 g of benzotriazole and 1.9 g of polyaspartic acid were mixed to obtain a corrosion inhibitor;

[0122] S7. 1.5 g of the corrosion inhibitor was added to 100 g of the mixed solution B1 and stirred for 28 min until the solution became clear to obtain a mixed solution B2;

[0123] S8. Add 0.18 g of AEO-9 to 103 g of mixed solution B2 and stir for 28 min until the solution becomes clear to obtain agent B;

[0124] S9. Disperse 0.9 g of sodium dehydroacetate in 72 g of deionized water and mix well to obtain a mixed solution C1;

[0125] S10. Mix 4.5 g of stearic acid amide and 4.5 g of castor oil to obtain a water-soluble base oil;

[0126] S11. 9 g of a water-soluble base oil and 9 g of polypropylene glycol were added to 72 g of the mixed solution C1 and mixed to obtain a mixed solution C2;

[0127] S12. 7 g of lauryl alcohol polyoxyethylene ether and 3 g of polyethylene glycol were mixed to obtain a surfactant;

[0128] S13. Add 12 g of surfactant to 90 g of the mixed solution C2 and stir at 54 ° C until completely dissolved to obtain Agent C;

[0129] S14. Mix 14 g of agent A, 11.5 g of agent B and 49 g of agent C, and stir evenly to obtain a lubricant based on peracetic acid.

[0130] Embodiment 6: A method for preparing a lubricant based on peracetic acid, comprising the following steps:

[0131] S1. Slowly add 1.5 g of analytically pure concentrated sulfuric acid to 18 g of analytically pure acetic acid and stir at a speed of 120 r / min for 7 min to obtain a mixed solution A1;

[0132] S2. 19.5 g of 35% hydrogen peroxide and 34 g of deionized water were added to 60 g of the mixed solution A1 and stirred at a speed of 120 r / min for 20 min to obtain a mixed solution A2;

[0133] S3. The mixed solution A2 was heated, stirred for 7 min every 4 h, heated to 47 ° C, and maintained at 47 ° C for 24 h to obtain a mixed solution A3;

[0134] S4. Stop heating the mixed solution A3, add 1.5 g of hydroxyethylidene diphosphonic acid to 113.5 g of the mixed solution A3, and stir at a speed of 120 r / min for 45 min to obtain Agent A;

[0135] S5. 7.5 g of analytical grade sodium hydroxide was added to 94 g of deionized water and stirred for 45 min until the solution was clear to obtain a mixed solution B1;

[0136] S6. 0.9 g of benzotriazole and 2 g of polyaspartic acid were mixed to obtain a corrosion inhibitor;

[0137] S7. 2.8 g of the corrosion inhibitor was added to 102 g of the mixed solution B1 and stirred for 30 min until the solution became clear to obtain a mixed solution B2;

[0138] S8. Add 0.25 g OP-10 to 105 g of mixed solution B2 and stir for 30 min until the solution becomes clear to obtain agent B;

[0139] S9. Disperse 1 g of sodium dehydroacetate in 70 g of deionized water and mix well to obtain a mixed solution C1;

[0140] S10. Mix 5 g of stearic acid amide and 5 g of castor oil to obtain a water-soluble base oil;

[0141] S11. 10 g of a water-soluble base oil and 10 g of polypropylene glycol were added to 68.6 g of the mixed solution C1 and mixed to obtain a mixed solution C2;

[0142] S12. 8 g of lauryl alcohol polyoxyethylene ether and 4 g of polyethylene glycol were mixed to obtain a surfactant;

[0143] S13. 9.9 g of surfactant was added to 92 g of the mixed solution C2 and stirred at 55 ° C until completely dissolved to obtain Agent C;

[0144] S14. Mix 15 g of agent A, 11.8 g of agent B and 50 g of agent C, and stir evenly to obtain a lubricant based on peracetic acid.

[0145] Comparative Example 1:

[0146] Compared with Example 1, in this comparative example, agent C was not added during the preparation of the peracetic acid-based lubricant, and the remaining steps and parameters were the same, which will not be repeated in this comparative example. Finally, a peracetic acid-based lubricant was obtained.

[0147] Comparative Example 2:

[0148] Compared with Example 1, this comparative example did not add a composite stabilizer during the preparation of the peracetic acid-based lubricant, and the remaining steps and parameters were the same, which will not be repeated in this comparative example. Finally, a peracetic acid-based lubricant was obtained.

[0149] Comparative Example 3:

[0150] Compared with Example 1, this comparative example did not add a corrosion inhibitor during the preparation of the peracetic acid-based lubricant, and the remaining steps and parameters were the same, which will not be repeated in this comparative example. Finally, a peracetic acid-based lubricant was obtained.

[0151] Comparative Example 4:

[0152] Compared with Example 1, this comparative example only adjusts "10gA agent", "10gB agent" and "45gC agent" to "45gA agent", "10gB agent" and "10gC agent", and the remaining steps and parameters are the same. This comparative example will not be repeated, and finally a lubricant based on peracetic acid is obtained.

[0153] Comparative Example 5:

[0154] Compared with Example 1, this comparative example only adjusts "0.4g benzotriazole" and "1.5g polyaspartic acid" to "1.5g benzotriazole" and "0.4g polyaspartic acid", and the remaining steps and parameters are the same, which will not be repeated in this comparative example, and finally a lubricant based on peracetic acid is obtained.

[0155] Comparative Example 6:

[0156] Compared with Example 1, this comparative example only replaces "benzotriazole" with "thiourea", and the remaining steps and parameters are the same, which will not be repeated in this comparative example. Finally, a lubricant based on peracetic acid is obtained.

[0157] Comparative Example 7:

[0158] Compared with Example 1, this comparative example only replaces "benzotriazole" with "urotropine", and the remaining steps and parameters are the same, which will not be repeated in this comparative example, and finally a lubricant based on peracetic acid is obtained.

[0159] Performance Test:

[0160] Corrosion resistance test:

[0161] According to Item 2.2.1.2.3 and Item 2.2.1.4 of the Technical Specification for Disinfection (2002 Edition), and referring to 5.1, 5.2 and 5.4 of GB / T38498-2020 "Method for Evaluation of Metal Corrosion of Disinfectants", the metal corrosion of the lubricants prepared in Examples 1 to 6 and Comparative Examples 1 to 7 of the present invention was tested;

[0162] Stability test:

[0163] According to the Technical Specification for Disinfection (2002 Edition), the lubricants prepared in Examples 1 to 6 and Comparative Examples 1 to 7 of the present invention were subjected to stability tests, and each group of samples was placed in a 37° C. incubator for 3 months, and the status of each group of samples was recorded;

[0164] Lubricity test:

[0165] The lubricants prepared in Examples 1 to 6 and Comparative Examples 1 to 7 were used to lubricate the same connecting joints of the same medical device, and the reduction ratio of the dynamic friction force before and after lubrication was statistically analyzed;

[0166] The results are shown in Tables 1 and 2 below:

[0167] Table 1 Summary of the corrosion resistance test results in Examples 1 to 6 and Comparative Examples 1 to 7

[0168]

[0169] Table 2 Summary of stability and lubricity test results in Examples 1 to 6 and Comparative Examples 1 to 7

[0170] project stability Dynamic friction reduction ratio / % Example 1 No discoloration, precipitation, or suspended matter 42 Example 2 No discoloration, precipitation, or suspended matter 41 Example 3 No discoloration, precipitation, or suspended matter 39 Example 4 No discoloration, precipitation, or suspended matter 38 Example 5 No discoloration, precipitation, or suspended matter 40 Example 6 No discoloration, precipitation, or suspended matter 39 Comparative Example 1 Small amount of discoloration, precipitation and suspended matter 22 Comparative Example 2 More discoloration, precipitation and suspended matter 31 Comparative Example 3 Small amount of discoloration, precipitation and suspended matter 33 Comparative Example 4 Small amount of discoloration, precipitation and suspended matter 28 Comparative Example 5 Small amount of discoloration, precipitation and suspended matter 34 Comparative Example 6 Small amount of discoloration, precipitation and suspended matter 36 Comparative Example 7 Small amount of discoloration, precipitation and suspended matter 35

[0171] Data Analysis:

[0172] It can be seen from Table 1 and Table 2 that the lubricant based on peracetic acid prepared by the present invention has stronger corrosion resistance, higher stability and stronger lubricity for various metals;

[0173] This may be because the present invention mixes agent A, agent B and agent C in a specific proportion, and the benzotriazole and polyaspartic acid are compounded in a specific proportion as a corrosion inhibitor, wherein the benzotriazole molecule is small and has poor ability to associate with water molecules. When the lubricant is used, it can quickly migrate to the metal surface to avoid corrosion. At the same time, since polyaspartic acid has many adsorption sites on the metal, polyaspartic acid competes with the benzotriazole metal surface for adsorption during use, and gradually replaces benzotriazole, thereby reducing the residual amount of benzotriazole on the metal surface. In addition, since polyaspartic acid has low toxicity and high safety, it can also reduce safety hazards to a certain extent. In addition, it is compounded with a composite stabilizer, a corrosion inhibitor, a water-soluble base oil and a bactericide for synergistic effect, and finally a lubricant with good stability, high lubricity and low foam residue can be prepared, and the lubricant prepared by this method can also kill bacteria remaining on the surface of the instrument after lubricating the instrument.

[0174] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0175] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lubricant based on peracetic acid, characterized in that, The lubricant is prepared from agent A, agent B and agent C in a mass ratio of 10-15:10-12:45-50; The agent A is prepared from the following raw materials: acetic acid, concentrated sulfuric acid, hydrogen peroxide, a composite stabilizer and deionized water; The composite stabilizer is any one of sodium pyrophosphate, disodium ethylenediaminetetraacetate, sodium gluconate, diethylenetriaminepenta(methylenephosphonic acid) and hydroxyethylidene diphosphonic acid; The agent B is prepared from the following raw materials: a neutralizer, a corrosion inhibitor, a wetting agent and deionized water; The corrosion inhibitor is obtained by mixing benzotriazole and polyaspartic acid in a mass ratio of 0.4-0.9:1.5-2; The agent C is prepared from the following raw materials: water-soluble base oil, surfactant, additive, bactericide and deionized water; The water-soluble base oil is obtained by mixing stearic acid amide and castor oil in a mass ratio of 2.5-5:2.5-5.

2. The peracetic acid-based lubricant according to claim 1, characterized in that The preparation method of the A agent is as follows: Step A1. Slowly add concentrated sulfuric acid to acetic acid and stir at a speed of 60-120 r / min for 5-7 min to obtain a mixed solution A1; Step A2. Add hydrogen peroxide and deionized water to the mixed solution A1, and stir at a speed of 60-120 r / min for 15-20 min to obtain a mixed solution A2; Step A3. Heat the mixed solution A2, stir for 5-7 min every 4 h, raise the temperature to 45-47 ° C, maintain the temperature at 45-47 ° C, and keep warm for 22-24 h to obtain a mixed solution A3; Step A4. Stop heating the mixed solution A3 and add the composite stabilizer, stirring at a speed of 60-120 r / min for 30-45 min to obtain Agent A.

3. The peracetic acid-based lubricant according to claim 2, characterized in that The mass ratio of acetic acid to concentrated sulfuric acid in step A1 is 15-18:0.5-1.5; The mass ratio of hydrogen peroxide, deionized water and mixed solution A1 in step A2 is 15.5-19.5:19-34:50-60; the concentration of hydrogen peroxide in step A2 is 30%-35%.

4. The peracetic acid-based lubricant according to claim 2, characterized in that The mass ratio of the mixed solution A3 to the composite stabilizer in step A4 is 84.5-113.5:0.5-1.

5.

5. The peracetic acid-based lubricant according to claim 1, characterized in that The preparation method of the B agent is as follows: Step B1. Add the neutralizing agent to deionized water and stir for 30-45 minutes until the solution is clear to obtain a mixed solution B1; Step B2. Add the corrosion inhibitor to the mixed solution B1 and stir for 15-30 min until the solution becomes clear to obtain a mixed solution B2; Step B3. Add the wetting agent to the mixed solution B2, stir for 15-30 minutes until the solution becomes clear, and obtain Agent B.

6. The peracetic acid-based lubricant according to claim 5, characterized in that The mass ratio of the neutralizing agent to deionized water in step B1 is 5-8:89-94; The neutralizing agent is analytical pure sodium hydroxide; The mass ratio of the corrosion inhibitor to the mixed solution B1 in step B2 is 1-3:93-102; The mass ratio of the wetting agent to the mixed solution B2 in step B3 is 0.1-0.3:94-105.

7. The peracetic acid-based lubricant according to claim 1, characterized in that The preparation method of the C agent is as follows: Step C1. Disperse the fungicide in deionized water and mix well to obtain a mixed solution C1; Step C2. adding the water-soluble base oil and the additives to the mixed solution C1, and mixing them evenly to obtain a mixed solution C2; Step C3. Add a surfactant to the mixed solution C2, and stir at 50-55°C until it is completely dissolved to obtain Agent C.

8. The peracetic acid-based lubricant according to claim 7, characterized in that The mass ratio of the bactericide to deionized water in step C1 is 0.5-1:68-72; The bactericide in step C1 is sodium dehydroacetate; The mass ratio of the water-soluble base oil, the additive and the mixed liquid C1 in step C2 is 5-10:5-10:68-72; The additive in step C2 is polypropylene glycol.

9. The peracetic acid-based lubricant according to claim 7, characterized in that In step C3, the mass ratio of the mixed solution C2 to the surfactant is 78-92:8-12; The surfactant in step C3 is obtained by mixing lauryl alcohol polyoxyethylene ether and polyethylene glycol in a mass ratio of 6-8:2-4.

10. A method for preparing a lubricant based on peracetic acid according to any one of claims 1 to 9, characterized in that: The following steps are involved: Mix Agent A, Agent B and Agent C, stir well, and obtain a peracetic acid-based lubricant.

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