CN115943954A - Halogen-free composite cationic low-temperature disinfectant and preparation method thereof - Google Patents
Halogen-free composite cationic low-temperature disinfectant and preparation method thereof Download PDFInfo
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- 239000000645 desinfectant Substances 0.000 title claims abstract description 65
- 239000002131 composite material Substances 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims description 15
- 125000002091 cationic group Chemical group 0.000 title claims description 14
- -1 ester compound Chemical class 0.000 claims abstract description 33
- 239000002904 solvent Substances 0.000 claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- XJMWHXZUIGHOBA-UHFFFAOYSA-N azane;propanoic acid Chemical compound N.CCC(O)=O XJMWHXZUIGHOBA-UHFFFAOYSA-N 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 8
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 15
- BHIZVZJETFVJMJ-UHFFFAOYSA-N 2-hydroxypropyl dodecanoate Chemical compound CCCCCCCCCCCC(=O)OCC(C)O BHIZVZJETFVJMJ-UHFFFAOYSA-N 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 12
- 229940026235 propylene glycol monolaurate Drugs 0.000 claims description 12
- 150000008051 alkyl sulfates Chemical class 0.000 claims description 11
- 229940087068 glyceryl caprylate Drugs 0.000 claims description 10
- GHBFNMLVSPCDGN-UHFFFAOYSA-N rac-1-monooctanoylglycerol Chemical compound CCCCCCCC(=O)OCC(O)CO GHBFNMLVSPCDGN-UHFFFAOYSA-N 0.000 claims description 10
- 239000002202 Polyethylene glycol Substances 0.000 claims description 9
- 229920001223 polyethylene glycol Polymers 0.000 claims description 9
- 239000004359 castor oil Substances 0.000 claims description 7
- 235000019438 castor oil Nutrition 0.000 claims description 7
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 7
- 229920001296 polysiloxane Polymers 0.000 claims description 6
- 230000001804 emulsifying effect Effects 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 claims description 4
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 229940058015 1,3-butylene glycol Drugs 0.000 claims description 2
- 150000001298 alcohols Chemical class 0.000 claims description 2
- 235000019437 butane-1,3-diol Nutrition 0.000 claims description 2
- OWBTYPJTUOEWEK-UHFFFAOYSA-N butane-2,3-diol Chemical compound CC(O)C(C)O OWBTYPJTUOEWEK-UHFFFAOYSA-N 0.000 claims description 2
- 229940048842 sodium xylenesulfonate Drugs 0.000 claims description 2
- QUCDWLYKDRVKMI-UHFFFAOYSA-M sodium;3,4-dimethylbenzenesulfonate Chemical compound [Na+].CC1=CC=C(S([O-])(=O)=O)C=C1C QUCDWLYKDRVKMI-UHFFFAOYSA-M 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 13
- 238000007710 freezing Methods 0.000 abstract description 12
- 230000008014 freezing Effects 0.000 abstract description 9
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 229910052736 halogen Inorganic materials 0.000 abstract description 5
- 238000013329 compounding Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 238000005187 foaming Methods 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 31
- 230000002528 anti-freeze Effects 0.000 description 13
- 238000004659 sterilization and disinfection Methods 0.000 description 7
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000001954 sterilising effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 241000191967 Staphylococcus aureus Species 0.000 description 2
- 230000000249 desinfective effect Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- VLPFTAMPNXLGLX-UHFFFAOYSA-N trioctanoin Chemical compound CCCCCCCC(=O)OCC(OC(=O)CCCCCCC)COC(=O)CCCCCCC VLPFTAMPNXLGLX-UHFFFAOYSA-N 0.000 description 2
- YRIZYWQGELRKNT-UHFFFAOYSA-N 1,3,5-trichloro-1,3,5-triazinane-2,4,6-trione Chemical compound ClN1C(=O)N(Cl)C(=O)N(Cl)C1=O YRIZYWQGELRKNT-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- 241001360526 Escherichia coli ATCC 25922 Species 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000001963 growth medium Substances 0.000 description 1
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 229950009390 symclosene Drugs 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Abstract
The invention relates to the technical field of low-temperature disinfectants, and provides a halogen-free compound cationic low-temperature disinfectant, which comprises the following components in percentage by weight: 3-4 parts of N, N-dialkyl N methyl poly (oxyethyl) ammonium propionate, 35-45 parts of an antifreezing agent, 1-6 parts of a composite ester compound, 1-5 parts of a solubilizer and 20-24 parts of water. The disinfectant disclosed by the invention is low in foaming, safe and harmless, free of corrosion to metal articles and environment-friendly, tests prove that the disinfectant does not contain halogen quaternary ammonium salt, the composite ester compound is added, so that the disinfectant has low foaming property, the freezing temperature of the disinfectant is remarkably reduced by compounding the antifreezing agent and the solubilizer, and the disinfectant can still exert high-efficiency bactericidal performance in a low-temperature environment.
Description
Technical Field
The invention relates to the technical field of low-temperature disinfectants, in particular to a halogen-free compound cationic low-temperature disinfectant and a preparation method thereof.
Background
At present, the disinfectant containing the quaternary ammonium salt has an application history of nearly one hundred years, the quaternary ammonium salt disinfectant has the effects of low concentration, effectiveness, small side effect, no color and low toxicity and safety, and is applied to the fields of industry, transportation and the like, wherein the disinfectant is widely applied to the field of cold chain transportation, but the quaternary ammonium salt disinfectant is easily influenced by temperature, is unstable in state at low temperature, is easy to freeze, is low in sterilization rate and extremely influenced in disinfection effect, and the disinfectant containing the quaternary ammonium salt can cause certain damage to a contacted human body when being used, has strong corrosivity to especially metal objects, is discharged into the environment after being used, and also can cause pollution to the environment.
Therefore, it is desired in the market to develop a quaternary ammonium salt disinfectant containing no halogen, which is safer and more friendly to users and the environment, has more stable performance, and has excellent sterilizing performance at low temperatures.
Patent No. CN114916559A discloses a low-temperature cold-chain disinfectant, which consists of an antifreezing agent and a hypochlorous acid aqueous solution, reduces the freezing temperature of the disinfectant, enables the disinfectant to be stable at low temperature, and exerts high-efficiency bactericidal performance. However, the disinfectant prepared by the invention contains halogen, has strong oxidizing property, strong corrosivity on metal objects, has certain pungent smell during use, and is not friendly to users and environment.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to solve the defects of the prior art and provides a halogen-free composite cationic low-temperature disinfectant and a preparation method thereof.
The technical scheme of the invention is as follows:
the invention provides a halogen-free composite cationic low-temperature disinfectant, which comprises the following components in parts by weight: 3-4 parts of N, N-dialkyl N methyl poly (oxyethyl) ammonium propionate, 35-45 parts of an antifreezing agent, 1-6 parts of a composite ester compound, 1-5 parts of a solubilizer and 20-24 parts of water.
Preferably, the halogen-free compound cationic low-temperature disinfectant comprises the following components in parts by weight: 3 parts of N, N-dialkyl N-methyl poly (oxyethyl) ammonium propionate, 40 parts of an antifreezing agent, 4 parts of a composite ester compound, 3 parts of a solubilizer and 22 parts of water.
The preparation method of the antifreeze comprises the following steps: putting polyethylene glycol and alcohols into an emulsifying stirrer, slowly adding 10-15% of polysiloxane by mass into the mixed solution under the conditions that the temperature is 60-90 ℃ and the stirring speed is 90-100rpm, and reacting for 1-2h;
the mass ratio of the polyethylene glycol to the alcohol is 4-5.
Preferably, the alcohol is one or more of dipropylene glycol, ethylene glycol or propylene glycol, dipropylene glycol, 1, 3-butylene glycol, and methyl-propylene glycol.
The solubilizer is one or a mixture of PEG-40 hydrogenated castor oil, sodium xylene sulfonate and PEG-60 hydrogenated castor oil.
The compound ester compound consists of caprylin, propylene glycol monolaurate and alkyl sulfate.
Preferably, the weight part ratio of the glyceryl caprylate to the propylene glycol monolaurate to the alkyl sulfate is 7-9.
The invention relates to a preparation method of a halogen-free compound cationic low-temperature disinfectant, which is characterized by comprising the following steps of:
step 1: weighing the raw material components in proportion;
and 2, step: after fully mixing the solubilizer and the water, adding the compound ester compound, the antifreezing agent and the N, N-dialkyl N methyl poly (oxyethyl) ammonium propionate, and continuously and uniformly mixing to obtain the halogen-free compound cationic low-temperature disinfectant.
Preferably, the mixing temperature is 30-45 ℃ and the mixing time is 60-120min.
Has the advantages that: the disinfectant provided by the invention has low foaming, is safe and harmless, does not corrode metal articles, and is environment-friendly, tests prove that the disinfectant does not contain halogen quaternary ammonium salt, and the composite ester compound is added, so that the disinfectant has low foaming property, and the freezing temperature of the disinfectant is remarkably reduced by compounding the antifreezing agent and the solubilizer, and the disinfectant can still exert high-efficiency bactericidal performance in a low-temperature environment.
Detailed Description
The present invention is illustrated by the following specific examples, which are presented to illustrate and explain the present invention and are not to be construed as limiting the invention.
Example 1
The embodiment provides a halogen-free composite cationic low-temperature disinfectant, which comprises the following components in parts by weight: 3 parts of N, N-dialkyl N-methyl poly (oxyethyl) ammonium propionate, 40 parts of an antifreezing agent, 4 parts of a composite ester compound, 3 parts of a solubilizer and 22 parts of water.
The preparation method of the antifreeze described in this embodiment is as follows: adding polyethylene glycol and alcohol into an emulsifying stirrer, slowly adding polysiloxane with the mass fraction of 12% into the mixed solution under the conditions that the temperature is 70 ℃ and the stirring speed is 95rpm, and reacting for 2 hours;
the mass ratio of the polyvinyl alcohol to the alcohol is 4.
The solubilizer described in this example is PEG-40 hydrogenated castor oil.
The compound ester compound described in this embodiment is composed of glyceryl caprylate, propylene glycol monolaurate and alkyl sulfate.
The weight part ratio of the glyceryl caprylate to the propylene glycol monolaurate to the alkyl sulfate is 8.
The preparation method of the halogen-free composite cationic low-temperature disinfectant is characterized by comprising the following steps of:
step 1: weighing the raw material components in proportion;
and 2, step: after fully mixing the solubilizer and water, adding the composite ester compound, the antifreezing agent and the N, N-dialkyl N methyl poly (oxyethyl) ammonium propionate, and continuously and uniformly mixing to obtain the halogen-free composite cationic low-temperature disinfectant.
The mixing temperature is 38 ℃, and the mixing time is 90min.
Example 2
The embodiment provides a halogen-free composite cationic low-temperature disinfectant, which comprises the following components in parts by weight: 3 parts of N, N-dialkyl N-methyl poly (oxyethyl) ammonium propionate, 35 parts of an antifreezing agent, 1 part of a composite ester compound, 1 part of a solubilizer and 20 parts of water.
The preparation method of the antifreeze described in this embodiment is as follows: adding polyethylene glycol and alcohol into an emulsifying stirrer, slowly adding 10% of polysiloxane by mass into the mixed solution under the conditions that the temperature is 60 ℃ and the stirring speed is 90rpm, and reacting for 1h;
the mass ratio of the polyethylene glycol to the alcohol is 4.
The polyalcohol is one or more of propylene glycol, ethylene glycol and the like.
The solubilizer described in this example is PEG-60 hydrogenated castor oil.
The compound ester compound described in this embodiment is composed of glyceryl caprylate, propylene glycol monolaurate and alkyl sulfate.
The weight part ratio of the glyceryl caprylate to the propylene glycol monolaurate to the alkyl sulfate is 7-9.
The preparation method of the halogen-free composite cationic low-temperature disinfectant is characterized by comprising the following steps of:
step 1: weighing the raw material components in proportion;
step 2: after fully mixing the solubilizer and the water, adding the compound ester compound, the antifreezing agent and the N, N-dialkyl N methyl poly (oxyethyl) ammonium propionate, and continuously and uniformly mixing to obtain the halogen-free compound cationic low-temperature disinfectant.
The mixing temperature is 30 ℃, and the mixing time is 60min.
Example 3
The embodiment provides a halogen-free composite cationic low-temperature disinfectant, which comprises the following components in parts by weight: 4 parts of N, N-dialkyl N-methyl poly (oxyethyl) ammonium propionate, 45 parts of an antifreezing agent, 6 parts of a composite ester compound, 5 parts of a solubilizer and 24 parts of water.
The preparation method of the antifreeze described in this embodiment is as follows: adding polyethylene glycol and alcohol into an emulsifying stirrer, slowly adding polysiloxane with the mass fraction of 15% into the mixed solution under the conditions that the temperature is 90 ℃ and the stirring speed is 100rpm, and reacting for 2 hours;
the mass ratio of the polyethylene glycol to the alcohol is 5.
The alcohol is one or a mixture of more of propylene glycol, ethylene glycol and the like.
The solubilizer described in this example is PEG-60 hydrogenated castor oil.
The compound ester compound described in this embodiment is composed of glyceryl caprylate, propylene glycol monolaurate and alkyl sulfate.
The weight part ratio of the glyceryl caprylate to the propylene glycol monolaurate to the alkyl sulfate is 9.
The preparation method of the halogen-free composite cationic low-temperature disinfectant is characterized by comprising the following steps of:
step 1: weighing the raw material components in proportion;
step 2: after fully mixing the solubilizer and the water, adding the compound ester compound, the antifreezing agent and the N, N-dialkyl N methyl poly (oxyethyl) ammonium propionate, and continuously and uniformly mixing to obtain the halogen-free compound cationic low-temperature disinfectant.
The mixing temperature is 45 ℃ and the mixing time is 120min.
Comparative example 1
Comparative example 1 differs from example 1 in that the antifreeze is an alcohol, propylene glycol.
Comparative example 2
Comparative example 2 differs from example 1 in that no polysiloxane was added during the preparation of the antifreeze.
Comparative example 3
Comparative example 3 differs from example 1 in that the complex lipid compound does not have glyceryl caprylate added.
Comparative example 4
Comparative example 4 differs from example 1 in that the complex lipid compound does not have propylene glycol monolaurate added.
Comparative example 5
Comparative example 5 differs from example 1 in that no complex lipid compound is added.
Comparative example 6
Comparative example 6 differs from example 1 in that no solubilizer is added.
Comparative example 7
Comparative example 7 differs from example 1 in that no antifreeze is added.
Comparative example 8
Comparative example 8 differs from example 1 in that comparative example 8 replaces the N, N-dialkyl N-methyl poly (oxyethyl) ammonium propionate with an equal amount of trichloroisocyanuric acid.
1. Low temperature freezing test
10ml of each of the disinfectants prepared in examples and comparative examples was put into a glass test tube, labeled, placed in an ultra-low temperature freezer, the freezer temperature was set to 0 deg.C, -10 deg.C, -20 deg.C, -30 deg.C in this order, the glass tube was taken out every 3 hours after each temperature setting, the freezing condition of the disinfectant in the test tube was observed, the test phenomenon was recorded, and the test results are shown in Table 1.
TABLE 1
As can be seen from the examples 1-3 and the comparative example, the disinfectant prepared in the scope of the invention is compounded by the antifreezing agent and the solubilizer, the freezing temperature is obviously reduced, the disinfectant can still keep liquid state at the temperature of minus 30 ℃, and the phenomenon of freezing is avoided; as can be seen from comparative examples 1-2 and comparative example 6, the antifreeze prepared by the invention can lower the liquid freezing point better than the common antifreeze, and the antifreeze prepared by the method of the invention has stronger antifreeze performance; as can be seen from comparative examples 6-7, the freezing temperature of the disinfectant can be reduced by compounding the solubilizer and the anti-freezing agent compared with the single addition.
2. Low temperature sterilization test
The disinfectants prepared in the examples 1-3, the comparative examples 1-2 and the comparative examples 6-8 are treated at different temperatures to be-10 ℃, 15 ℃ and 20 ℃, 1ml of the disinfectants are respectively applied to the culture media in which escherichia coli ATCC25922 and staphylococcus aureus ATCC6538 are respectively cultured, the acting time is 5min, the number of colonies is calculated by adopting a dilution plate counting method after the acting is finished, the killing rate is calculated, and the test results are shown in Table 2.
Kill rate = (number of microorganisms before disinfection-number of microorganisms after disinfection)/number of microorganisms before disinfection x 100%.
TABLE 2
As can be seen from the results in Table 2, the disinfectants prepared in examples 1-3 have strong bactericidal power under the temperature range of-10 ℃ to-20 ℃, and have a sterilization rate of over 99 percent for Escherichia coli and Staphylococcus aureus. As can be seen from comparative examples 1-2, the antifreeze prepared by the preparation method of the invention has better stability at low temperature than the common antifreeze, and does not influence the bactericidal performance of the disinfectant; as can be seen from the comparative examples 6-7, the anti-freezing agent and the solubilizer compound ratio are not added with the solubilizer or the anti-freezing agent, so that the sterilization performance stability of the disinfectant is greatly improved and is not influenced by low temperature; as can be seen from comparative example 8, the N, N-dialkyl N-methyl poly (oxyethyl) ammonium propionate added in the disinfectant of the present invention has a very good bactericidal effect when added as an important bactericidal component.
Test III, foam Performance test
30ml of the disinfectant prepared in examples 1 to 3 and comparative examples 3 to 5 was put in a flask and stirred with shaking for 10min, and the test results are shown in Table 3.
Table 3.
The experimental results in table 3 show that the disinfectant prepared by the invention has low foamability, the foam height is lower than 3cm, and the comparative examples 3-5 show that the composite lipid compound is added into the disinfectant prepared by the invention, the foamability is lower than that of the disinfectant without the composite lipid compound, and the foamability of the disinfectant is remarkably reduced by compounding the caprylin, the propylene glycol monolaurate and the alkyl sulfate.
Test four, testing of metal corrosion performance
The samples of examples 1 to 3 and comparative example 8 were used to soak an iron and copper alloy for 24 hours and the surface was observed with an optical microscope, and it was shown that the halogen-free disinfecting solution prepared within the scope of the present invention did not cause corrosion on the metal surface, and that the sample of comparative example 8, which is a halogen-containing disinfecting solution, caused slight corrosion on the metal surface.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. A halogen-free composite cationic low-temperature disinfectant is characterized by comprising the following components in parts by weight: 3-4 parts of N, N-dialkyl N methyl poly (oxyethyl) ammonium propionate, 35-45 parts of an antifreezing agent, 1-6 parts of a composite ester compound, 1-5 parts of a solubilizer and 20-24 parts of water.
2. The halogen-free compound cationic low-temperature disinfectant as claimed in claim 1, which comprises the following components in parts by weight: 3 parts of N, N-dialkyl N-methyl poly (oxyethyl) ammonium propionate, 40 parts of an antifreezing agent, 4 parts of a composite ester compound, 3 parts of a solubilizer and 22 parts of water.
3. The halogen-free compound cationic low-temperature disinfectant as claimed in claim 1, wherein the preparation method of the antifreezing agent is as follows: putting polyethylene glycol and alcohols into an emulsifying stirrer, slowly adding 10-15% of polysiloxane by mass into the mixed solution under the conditions that the temperature is 60-90 ℃ and the stirring speed is 90-100rpm, and reacting for 1-2h;
the mass ratio of the polyethylene glycol to the alcohol is 4-5.
4. The halogen-free compound cationic low-temperature disinfectant as claimed in claim 3, wherein said alcohol is one or more of dipropylene glycol, ethylene glycol or propylene glycol, dipropylene glycol, 1, 3-butylene glycol, methyl-propylene glycol.
5. The halogen-free composite cationic low-temperature disinfectant according to claim 1, wherein the solubilizer is one or more of PEG-40 hydrogenated castor oil, sodium xylene sulfonate and PEG-60 hydrogenated castor oil.
6. The halogen-free compound cationic low-temperature disinfectant as claimed in claim 1, wherein said compound ester compound is composed of glyceryl caprylate, propylene glycol monolaurate and alkyl sulfate.
7. The halogen-free compound cationic low-temperature disinfectant as claimed in claim 6, wherein the weight ratio of the glyceryl caprylate, the propylene glycol monolaurate and the alkyl sulfate is 7-9.
8. The method for preparing a halogen-free composite cationic low-temperature disinfectant according to any one of claims 1 to 7, comprising the steps of:
step 1: weighing the raw material components in proportion;
step 2: after the solubilizer and water are fully stirred uniformly, the compound ester compound, the antifreezing agent and the N, N-dialkyl N methyl poly (oxyethyl) ammonium propionate are added, and the mixture is continuously and uniformly mixed at a certain temperature to obtain the halogen-free compound cationic low-temperature disinfectant.
9. The method of claim 8, wherein the mixing temperature of step 2 is 30-45 ℃ and the mixing time is 60-120min.
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