An o-phenyl gray dye decontamination paste as well as a preparation method and application thereof

Abstract

The application discloses a kind of o-benzene ash dye decontamination paste and preparation method and application thereof, belong to the technical field of medical instrument cleaning, o-benzene ash dye decontamination paste includes the following mass percentage content of raw materials: PRAEPAGEN HY 8-15%, anionic surfactant 2-25%, non-ionic surfactant 5-30%, wetting agent 20-50%, thickening agent 1-10%, rubbing agent 10-30%, binder 0.01-1.0%, chelating agent 0.01-1.0%, preservative 0.01-1.0%, the balance is purified water.The decontamination paste of the application can effectively remove the ash dye on medical instruments, the removal rate is as high as 98.0% or more, and can also form a layer of moisturizing protective film on the surface of medical instruments, the production method is simple, suitable for extensive production, the product does not need to be packaged in combination, can greatly save production cost, the use method is simple and convenient, and is suitable for extensive application.

Description

Technical Field

[0001] This invention belongs to the technical field of medical device cleaning, specifically relating to a phthalate stain remover paste, its preparation method, and its application. Background Technology

[0002] Phthalate disinfectant is a novel aldehyde-based disinfectant for high-level operations, exhibiting broad-spectrum and highly effective killing of common bacteria, fungi, and viruses. It is currently a widely used disinfectant in clinical settings, possessing advantages such as stable performance, low irritation, strong antioxidant capacity, and the ability to be used continuously for 14 days. In my country, it is commonly used for manual or machine cleaning of various endoscopes. However, long-term use of these functional disinfectants can cause varying degrees of contamination to medical instruments and cleaning tanks, frequently requiring medical staff to incur significant labor and cleaning costs for cleaning and protective treatment of these devices, becoming one of the challenging situations faced in clinical practice.

[0003] Therefore, how to develop a phthalic acid stain remover paste with high efficiency in removing ash staining, as well as its preparation method and application, is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a phthalate stain remover paste, its preparation method, and its application.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A phthalic anhydride stain remover paste comprises the following raw materials in the following weight percentages: PRAEPAGEN HY 8-15%, anionic surfactant 2-25%, nonionic surfactant 5-30%, wetting agent 20-50%, thickener 1-10%, abrasive 10-30%, binder 0.01-1.0%, chelating agent 0.01-1.0%, preservative 0.01-1.0%, and the balance being purified water.

[0007] Furthermore, the mass percentage content of the aforementioned PRAEPAGEN HY is 10-12%.

[0008] Preferably, the mass percentage content of each of the above raw materials is as follows: anionic surfactant 10-20%, nonionic surfactant 12-18%, wetting agent 27-35%, thickener 4-7.5%, friction agent 11.5-18%, binder 0.1-0.3%, chelating agent 0.3-0.5%, and preservative 0.1-0.5%.

[0009] Furthermore, the aforementioned anionic surfactant is one or more of the following: sodium fatty alcohol polyoxyethylene ether sulfate, potassium fatty acid soap, sodium α-olefin sulfonate, sodium dodecylbenzene sulfonate, sodium fatty alcohol polyoxyethylene ether phosphate, potassium cocoate soap, or sodium fatty acid methyl ester sulfonate.

[0010] Preferably, the anionic surfactant is one or more of sodium dodecylbenzenesulfonate, potassium fatty acid soap, or sodium fatty alcohol polyoxyethylene ether sulfate.

[0011] More preferably, the above-mentioned anionic surfactant is sodium dodecylbenzenesulfonate and potassium fatty acid soap, and the mass percentage content of each raw material is: sodium dodecylbenzenesulfonate 4-8%, potassium fatty acid soap 6-12%.

[0012] Furthermore, the aforementioned nonionic surfactant is one or more of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, or fatty acid methyl ester polyoxyethylene ether.

[0013] Preferably, the nonionic surfactant is one or both of fatty alcohol polyoxyethylene ether or alkylphenol polyoxyethylene ether.

[0014] More preferably, the nonionic surfactant is a fatty alcohol polyoxyethylene ether, with a mass percentage content of 12-18%.

[0015] Furthermore, the aforementioned wetting agent is one or more of propylene glycol, glycerol, sorbitol, polyethylene glycol 400, pentaerythritol, or isopropanol.

[0016] Preferably, the wetting agent is glycerol, sorbitol and polyethylene glycol 400, and the mass percentage content of each raw material is: glycerol 12-15%, sorbitol 10-12%, polyethylene glycol 400 5-8%.

[0017] Furthermore, the aforementioned thickener is one or more of fatty acid methyl ester polyoxyethylene ether, hydroxypropyl methylcellulose, or fumed hydrophilic SiO2.

[0018] Preferably, the thickener is hydroxypropyl methylcellulose and fumed hydrophilic SiO2, and the mass percentage content of each raw material is: 3-5% hydroxypropyl methylcellulose and 1.0-2.5% fumed hydrophilic SiO2.

[0019] Furthermore, the aforementioned friction agent is light calcium carbonate, sodium bicarbonate, hydrated silica, anhydrous calcium pyrophosphate, or... phosphorus calcium hydrogen phosphate One or more of them.

[0020] Preferably, the above-mentioned friction agent is nano-sized light calcium carbonate and hydrated silica, and the mass percentage content of each raw material is: 10-15% nano-sized light calcium carbonate and 1.5-3.0% hydrated silica.

[0021] Furthermore, the chelating agent mentioned above is one or both of EDTA-2Na or benzotriazole.

[0022] Preferably, the chelating agent is EDTA-2Na, with a mass percentage content of 0.3-0.5%.

[0023] Furthermore, the aforementioned adhesive is one or both of trehalose or guar gum.

[0024] Preferably, the binder is trehalose, with a mass percentage content of 0.1-0.3%.

[0025] Furthermore, the aforementioned preservative is one or both of Kathon K15 or potassium sorbate.

[0026] Preferably, the preservative is Kathon K15, with a mass percentage content of 0.1-0.5%.

[0027] This invention also provides a method for preparing a phthalate stain remover paste, comprising the following steps:

[0028] (1) Weigh each raw material according to the above-mentioned mass percentage content;

[0029] (2) Mix and dissolve PRAEPAGEN HY, anionic surfactant and purified water, add wetting agent and nonionic surfactant and stir evenly;

[0030] (3) Add the abrasive, thickener, binder, chelating agent and preservative in small amounts and in sequence, and stir evenly to obtain the above-mentioned phthalic anhydride stain remover paste.

[0031] Furthermore, in step (3), the stirring time is 30-60 minutes and the stirring speed is 50-150 r / min.

[0032] The present invention also provides an application of the above-mentioned phthalic acid stain remover in removing the staining phenomenon caused by phthalic acid disinfectant on medical devices.

[0033] The beneficial effects of this invention are:

[0034] PRAEPAGEN HY's main chemical component is alkyl hydrocarbon ethyl dimethyl ammonium chloride (molecular weight 307), which has excellent solubility and hydrophilicity, good stability, and foam suppression. When combined with an appropriate proportion of anionic and nonionic surfactants, it can be used as a detergent and bactericide. This invention uses a compound of PRAEPAGEN HY, anionic surfactants, nonionic surfactants, and abrasives as the main cleaning agent. Through physicochemical reactions, it removes the gray stains caused by phthalic acid disinfectant. The wetting agent selected in this invention also provides wetting and protection to the surface of medical devices, further mitigating the damage caused by gray stains. The chelating agent selected in this invention has a certain adsorption and chelation effect on metal ions, further protecting the medical devices. The detergent paste of this invention has stable properties, good fluidity, is mild and non-irritating, and has good moisturizing properties. It not only effectively removes gray stains from medical devices but also forms a moisturizing and protective film on the surface of the medical devices.

[0035] The production method of this invention is simple and requires no special equipment such as heating or ball milling, making it suitable for widespread production; the product does not need to be bottled in a combined form, which can significantly save production costs.

[0036] The invention is simple and convenient to use, has a high efficiency in removing ash stains, is more conducive to manual operation by medical staff, can greatly save cleaning time, and has a ash stain removal rate of over 98.0%. Detailed Implementation

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] The PRAEPAGEN HY used in the embodiments and comparative examples of this invention is manufactured by Clariant, SAPPlanta Tarragona.

[0039] Example 1

[0040] The preparation method of phthalic anhydride stain remover paste includes the following steps:

[0041] (1) Weigh out: 8 kg of PRAEPAGEN HY;

[0042] Anionic surfactants: 6 kg of sodium fatty alcohol polyoxyethylene ether sulfate, 4 kg of sodium dodecylbenzene sulfonate, and 3 kg of potassium cocoate soap;

[0043] Nonionic surfactants: alkylphenol polyoxyethylene ether 5kg, fatty alcohol polyoxyethylene ether 5kg;

[0044] Wetting agents: 6 kg propylene glycol, 10 kg sorbitol, 12 kg glycerol;

[0045] Thickener: 3 kg of fatty acid methyl ester polyoxyethylene ether, 2 kg of fumed hydrophilic SiO2;

[0046] Friction agent: 5 kg of anhydrous calcium pyrophosphate, 3 kg of hydrated silica, 3 kg of sodium bicarbonate;

[0047] Binder: Trehalose 0.2kg;

[0048] Chelating agent: benzotriazole 0.3 kg;

[0049] Preservative: Kathon K15 0.5kg;

[0050] Purified water: 24kg;

[0051] (2) Mix and dissolve PRAEPAGEN HY, anionic surfactant and purified water, add wetting agent and nonionic surfactant and stir evenly;

[0052] (3) Add the abrasive, thickener, binder, chelating agent and preservative in small amounts and in sequence, and stir evenly at a constant speed for 30 minutes at a stirring speed of 50 r / min to obtain the phthalic anhydride stain remover paste.

[0053] Example 2

[0054] The preparation method of phthalic anhydride stain remover paste includes the following steps:

[0055] (1) Weigh out: 15kg of PRAEPAGEN HY;

[0056] Anionic surfactants: 4 kg of sodium α-olefin sulfonate and 15 kg of potassium fatty acid soap;

[0057] Nonionic surfactant: 10 kg of fatty alcohol polyoxyethylene ether;

[0058] Wetting agents: glycerol 12kg, sorbitol 5kg, polyethylene glycol 400 3kg;

[0059] Thickener: 4 kg hydroxypropyl methylcellulose, 3 kg fumed hydrophilic SiO2;

[0060] Friction agent: 5 kg of light calcium carbonate, 10 kg of hydrated silica, and 2 kg of sodium bicarbonate;

[0061] Binder: Trehalose 0.1kg;

[0062] Chelating agent: EDTA-2Na 0.3kg;

[0063] Preservative: Kathon K15 0.1kg;

[0064] Purified water: 11.5 kg;

[0065] (2) Mix and dissolve PRAEPAGEN HY, anionic surfactant and purified water, add wetting agent and nonionic surfactant and stir evenly;

[0066] (3) Add the abrasive, thickener, binder, chelating agent and preservative in small amounts and in sequence, and stir evenly at a constant speed for 60 minutes at a stirring speed of 50 r / min to obtain the phthalic anhydride stain remover paste.

[0067] Example 3

[0068] The preparation method of phthalic anhydride stain remover paste includes the following steps:

[0069] (1) Weigh out: 10 kg of PRAEPAGEN HY;

[0070] Anionic surfactants: 6 kg sodium dodecylbenzenesulfonate, 10 kg potassium fatty acid soap;

[0071] Nonionic surfactant: fatty alcohol polyoxyethylene ether 15kg;

[0072] Wetting agents: glycerol 12kg, sorbitol 10kg, polyethylene glycol 400 5kg;

[0073] Thickener: 4 kg hydroxypropyl methylcellulose, 1.5 kg fumed hydrophilic SiO2;

[0074] Friction agent: 10 kg of nano-grade lightweight calcium carbonate, 2 kg of hydrated silica;

[0075] Binder: Trehalose 0.1kg;

[0076] Chelating agent: EDTA-2Na 0.3kg;

[0077] Preservative: Kathon K15 0.1kg;

[0078] Purified water: 14 kg;

[0079] (2) Mix and dissolve PRAEPAGEN HY, anionic surfactant and purified water, add wetting agent and nonionic surfactant and stir evenly;

[0080] (3) Add the abrasive, thickener, binder, chelating agent and preservative in small amounts and in sequence, and stir evenly at a constant speed for 45 minutes at a stirring speed of 100 r / min to obtain the phthalic anhydride stain remover paste.

[0081] Example 4

[0082] The preparation method of phthalic anhydride stain remover paste includes the following steps:

[0083] (1) Weigh out: 12kg of PRAEPAGEN HY;

[0084] Anionic surfactants: 8 kg sodium dodecylbenzenesulfonate, 10 kg potassium fatty acid soap;

[0085] Nonionic surfactant: fatty alcohol polyoxyethylene ether 18kg;

[0086] Wetting agents: glycerol 13kg, sorbitol 12kg;

[0087] Thickener: 3 kg hydroxypropyl methylcellulose, 1 kg fumed hydrophilic SiO2;

[0088] Friction agent: 9 kg of nano-grade lightweight calcium carbonate, 3 kg of hydrated silica;

[0089] Binder: Trehalose 0.2kg;

[0090] Chelating agent: EDTA-2Na 0.5kg;

[0091] Preservative: Kathon K15 0.5kg;

[0092] Purified water: 9.8 kg;

[0093] (2) Mix and dissolve PRAEPAGEN HY, anionic surfactant and purified water, add wetting agent and nonionic surfactant and stir evenly;

[0094] (3) Add the abrasive, thickener, binder, chelating agent and preservative in small amounts and in sequence, and stir evenly at a constant speed for 30 minutes at a stirring speed of 150 r / min to obtain phthalic anhydride stain remover paste.

[0095] Example 5

[0096] The preparation method of phthalic anhydride stain remover paste includes the following steps:

[0097] (1) Weigh out: 15kg of PRAEPAGEN HY;

[0098] Anionic surfactant: Sodium dodecylbenzenesulfonate 2kg;

[0099] Nonionic surfactant: 5 kg of fatty alcohol polyoxyethylene ether;

[0100] Wetting agents: glycerol 12kg, sorbitol 13kg;

[0101] Thickener: 1 kg hydroxypropyl methylcellulose, 3 kg fumed hydrophilic SiO2;

[0102] Friction agent: 12 kg of nano-grade lightweight calcium carbonate, 18 kg of hydrated silica;

[0103] Binder: Trehalose 0.2kg;

[0104] Chelating agent: EDTA-2Na 0.5kg;

[0105] Preservative: Kathon K15 0.5kg;

[0106] Purified water: 17.8 kg;

[0107] (2) Mix and dissolve PRAEPAGEN HY, anionic surfactant and purified water, add wetting agent and nonionic surfactant and stir evenly;

[0108] (3) Add the abrasive, thickener, binder, chelating agent and preservative in small amounts and in sequence, and stir evenly at a constant speed for 60 minutes at a stirring speed of 150 r / min to obtain the phthalic anhydride stain remover paste.

[0109] Example 6

[0110] The preparation method of phthalic anhydride stain remover paste includes the following steps:

[0111] (1) Weigh out: 8 kg of PRAEPAGEN HY;

[0112] Anionic surfactants: 6 kg sodium dodecylbenzenesulfonate, 9 kg methyl cocoate soap, 10 kg potassium fatty acid soap;

[0113] Nonionic surfactant: alkylphenol polyoxyethylene ether 5kg;

[0114] Wetting agents: 5 kg propylene glycol, 15 kg sorbitol, 15 kg polyethylene glycol 400;

[0115] Thickener: 1 kg of fumed hydrophilic SiO2;

[0116] Friction agent: 9 kg of nano-grade lightweight calcium carbonate, 1 kg of hydrated silica;

[0117] Binder: Trehalose 0.1kg;

[0118] Chelating agent: EDTA-2Na 0.3kg;

[0119] Preservative: Kathon K15 0.1kg;

[0120] Purified water: 15.5 kg;

[0121] (2) Mix and dissolve PRAEPAGEN HY, anionic surfactant and purified water, add wetting agent and nonionic surfactant and stir evenly;

[0122] (3) Add the abrasive, thickener, binder, chelating agent and preservative in small amounts and in sequence, and stir evenly at a constant speed for 45 minutes at a stirring speed of 90 r / min to obtain the phthalic anhydride stain remover paste.

[0123] Example 7

[0124] The preparation method of phthalic anhydride stain remover paste includes the following steps:

[0125] (1) Weigh out: 10 kg of PRAEPAGEN HY;

[0126] Anionic surfactant: Sodium dodecylbenzenesulfonate 2kg;

[0127] Nonionic surfactants: 15 kg of fatty alcohol polyoxyethylene ether and 15 kg of alkylphenol polyoxyethylene ether;

[0128] Wetting agents: 5 kg propylene glycol, 15 kg glycerol, 15 kg polyethylene glycol 400;

[0129] Thickener: 1.5 kg of fumed hydrophilic SiO2;

[0130] Friction agent: 10 kg of nano-grade lightweight calcium carbonate;

[0131] Binder: Trehalose 0.1kg;

[0132] Chelating agent: EDTA-2Na 0.3kg;

[0133] Preservative: Kathon K15 0.1kg;

[0134] Purified water: 11kg;

[0135] (2) Mix and dissolve PRAEPAGEN HY, anionic surfactant and purified water, add wetting agent and nonionic surfactant and stir evenly;

[0136] (3) Add the abrasive, thickener, binder, chelating agent and preservative in small amounts and in sequence, and stir evenly at a constant speed for 40 minutes at a stirring speed of 100 r / min to obtain the phthalic anhydride stain remover paste.

[0137] Example 8

[0138] The preparation method of phthalic anhydride stain remover paste includes the following steps:

[0139] (1) Weigh out: 10 kg of PRAEPAGEN HY;

[0140] Anionic surfactant: Sodium dodecylbenzenesulfonate 5kg;

[0141] Nonionic surfactant: 10 kg of fatty alcohol polyoxyethylene ether;

[0142] Wetting agents: 5 kg propylene glycol, 15 kg glycerol, 15 kg sorbitol, 15 kg polyethylene glycol 400;

[0143] Thickener: 1 kg of fumed hydrophilic SiO2;

[0144] Friction agent: 10 kg of nano-grade lightweight calcium carbonate;

[0145] Binder: Trehalose 0.1kg;

[0146] Chelating agent: EDTA-2Na 0.3kg;

[0147] Preservative: Kathon K15 0.1kg;

[0148] Purified water: 13.5 kg;

[0149] (2) Mix and dissolve PRAEPAGEN HY, anionic surfactant and purified water, add wetting agent and nonionic surfactant and stir evenly;

[0150] (3) Add the abrasive, thickener, binder, chelating agent and preservative in small amounts and in sequence, and stir evenly at a constant speed for 60 minutes at a stirring speed of 100 r / min to obtain the phthalic anhydride stain remover paste.

[0151] Comparative Example 1

[0152] The preparation method of the phthalic anhydride stain remover paste is the same as that in Example 3, except that no PRAEPAGEN HY was added. All other raw materials, dosages, and preparation steps are the same.

[0153] Comparative Example 2

[0154] The preparation method of the phthalic anhydride stain remover paste is the same as that in Example 3, except that no anionic surfactant is added. The other raw materials, dosages, and preparation steps are the same.

[0155] Comparative Example 3

[0156] The preparation method of the phthalic anhydride stain remover paste is the same as that in Example 3, except that no nonionic surfactant is added. The other raw materials, dosages, and preparation steps are the same.

[0157] Comparative Example 4

[0158] The preparation method of the phthalic anhydride stain remover paste is the same as that in Example 3, except that no PRAEPAGEN HY and anionic surfactant are added.

[0159] Comparative Example 5

[0160] The preparation method of the phthalic anhydride stain remover paste is the same as that in Example 3, except that no PRAEPAGEN HY and nonionic surfactants are added.

[0161] Comparative Example 6

[0162] The preparation method of the phthalic anhydride stain remover paste is the same as that in Example 3, except that no abrasive is added. All other raw materials, dosages, and preparation steps are the same.

[0163] Comparative Example 7

[0164] The preparation method of the phthalic anhydride stain remover paste is the same as that in Example 3, except that no wetting agent is added. The other raw materials, dosages, and preparation steps are the same.

[0165] Comparative Example 8

[0166] The preparation method of the phthalic anhydride stain remover paste is the same as that in Example 3, except that no chelating agent is added. All other raw materials, dosages, and preparation steps are the same.

[0167] Performance testing experiments: Phthalate stain remover was prepared according to Examples 1-8, and then tested according to the performance specifications of QB / T2117-95. The results are shown in Table 1 below:

[0168] Table 1 Performance indicators of phthalic anhydride stain remover pastes from Examples 1-8

[0169]

[0170] As shown in Table 1, the cleaning pastes prepared in this application all meet the performance index requirements of general water-based metal cleaning agents in QB / T2117-95.

[0171] Phthalate removal rate test: The test was conducted according to the test method in QB / T2117-95. Stainless steel sheets were prepared and manually sprayed with phthalic acid disinfectant until obvious ash staining appeared on the stainless steel surface, thus preparing the ash-stained stainless steel surface.

[0172] How to use stain remover:

[0173] Apply an appropriate amount of this product to the surface of the object where the dust stains need to be removed. For heavily soiled areas, leave the product on the surface for 5-10 minutes.

[0174] Wipe the surface of the object stained with dust with a damp scouring pad;

[0175] Wipe and scrub clean with a clean brush under running deionized water.

[0176] The removal rates of phthalic acid stain remover paste were tested, and the removal rates of Examples 1-8 were 98.0%, 98.8%, 99.9%, 99.5%, 98.7%, 98.3%, 98.7%, and 98.2%, respectively. The removal rates of Comparative Examples 1-8 were 69.6%, 78.3%, 72.3%, 63.4%, 65.8%, 85.6%, 91.2%, and 98.8%, respectively.

[0177] The test data from Examples 1-8 and Comparative Examples 1-8 show that the phthalic anhydride stain remover prepared in this application has a removal rate of up to 98.0% for phthalic anhydride staining, and the stain remover product prepared with the optimized formula has a removal rate of up to 99.9%, which clearly demonstrates that the phthalic anhydride stain remover prepared in this application can effectively remove phthalic anhydride staining.

[0178] As can be seen from Examples 1-8 and Comparative Examples 1-8, the phthalic acid stain remover of this application uses a compound of PRAEPAGENHY, anionic surfactants, nonionic surfactants, and abrasives as the main cleaning agents. It can remove stains caused by phthalic acid disinfectant through a combined physicochemical reaction. The selected wetting agent also provides a wetting and protective effect on the surface of medical devices, further mitigating the damage caused by stains. Comparative Examples 3 and 8 show that the addition of chelating agents has little impact on the removal rate of the stain remover, but the selected chelating agents can adsorb and chelate metal ions to a certain extent, further protecting the medical devices. The stain remover of this invention has stable properties, good fluidity, is mild and non-irritating, and has good moisturizing properties. It can not only effectively remove stains from medical devices but also form a moisturizing and protective film on the surface of the medical devices.

[0179] The description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The application of a phthalic acid stain remover in removing gray stains caused by phthalic acid disinfectant on medical devices, characterized in that, The phthalic anhydride stain remover paste comprises the following raw materials in the following weight percentages: PRAEPAGEN HY 8-15%, anionic surfactant 2-25%, nonionic surfactant 5-30%, wetting agent 20-50%, thickener 1-10%, abrasive 10-30%, binder 0.01-1.0%, chelating agent 0.01-1.0%, preservative 0.01-1.0%, and the balance being purified water; The anionic surfactant is one or more of the following: sodium fatty alcohol polyoxyethylene ether sulfate, potassium fatty acid soap, sodium α-olefin sulfonate, or sodium dodecylbenzene sulfonate. The nonionic surfactant is one or both of fatty alcohol polyoxyethylene ether or alkylphenol polyoxyethylene ether.

2. The application of the phthalic acid stain remover paste according to claim 1 in removing the gray staining caused by phthalic acid disinfectant on medical devices, characterized in that, The mass percentage content of the PRAEPAGEN HY is 10-12%.

3. The application of the phthalic acid stain remover paste according to claim 1 in removing the gray staining caused by phthalic acid disinfectant on medical devices, characterized in that, The wetting agent is one or more of propylene glycol, glycerol, sorbitol, or polyethylene glycol 400.

4. The application of the phthalic acid stain remover paste according to claim 1 in removing the gray staining caused by phthalic acid disinfectant on medical devices, characterized in that, The thickener is one or more of fatty acid methyl ester polyoxyethylene ether, hydroxypropyl methylcellulose, or gas-phase hydrophilic SiO2.

5. The application of the phthalic acid stain remover paste according to claim 1 in removing the gray staining caused by phthalic acid disinfectant on medical devices, characterized in that, The friction agent is one or more of light calcium carbonate, sodium bicarbonate, hydrated silica, or anhydrous calcium pyrophosphate.

6. The application of the phthalic acid stain remover paste according to claim 1 in removing the gray staining caused by phthalic acid disinfectant on medical devices, characterized in that, The chelating agent is EDTA-2Na.

7. A method for preparing a phthalic anhydride stain remover according to any one of claims 1-6, characterized in that, Includes the following steps: (1) Weigh each raw material according to its mass percentage content; (2) Mix and dissolve PRAEPAGEN HY, anionic surfactant and purified water, add wetting agent and nonionic surfactant and stir evenly; (3) Add the abrasive, thickener, binder, chelating agent and preservative in sequence, and stir evenly at a constant speed to obtain the phthalic anhydride stain remover paste.

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