Hard surface oil stain cleaning agent and preparation method thereof

Abstract

The invention relates to a hard surface oil stain cleaning agent and a preparation method thereof, and aims to solve the problems of contradiction between decontamination efficiency and material compatibility, insufficient environmental protection property and single function of a traditional cleaning agent. According to the cleaning agent, an innovative formula is adopted, sodium hydroxide and triethanolamine are used for constructing an alkaline system, mineral oil is dissolved through dipropylene glycol butyl ether, emulsifying dispersion is achieved through compounding of nonionic and anionic surfactants (BEROL226SA), metal materials are protected with the assistance of benzotriazole, and the proportion of environment-friendly components with the biodegradation rate larger than or equal to 90% exceeds 95%. A triple synergistic decontamination mechanism enables the oil stain removal rate to be greater than or equal to 95% and the surface tension to be less than or equal to 30mN / m; the pH value is precisely regulated and controlled to 9-10, and metal protection and glass / ceramic compatibility are achieved through components such as EDTA disodium and the like; and the low-VOC solvent system meets the Ecoabel standard of European Union. The cleaning agent is suitable for multiple scenes such as kitchens, bathrooms and industrial equipment, has efficient cleaning power and environmental friendliness, and has remarkable technical breakthrough and market application value in the field of hard surface cleaning.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning agents, and specifically to a hard surface oil stain cleaning agent and a preparation method thereof. Background Art

[0002] Hard surface cleaning is widely used in fields such as households, industries, and public facilities, covering materials such as kitchen stoves, bathroom tiles, industrial equipment, and glass ceramics. The following technical bottlenecks exist in traditional hard surface cleaning agents:

[0003] Contradiction between decontamination efficiency and material compatibility

[0004] Existing products mostly rely on high-concentration strong alkalis (such as NaOH) or strong acids (such as hydrochloric acid) to achieve decontamination. However, strong alkalinity easily causes metal oxidation and rust, while strong acidity corrodes sensitive materials such as glass and ceramics. For example, the pH value of commercially available kitchen cleaning agents is often higher than 11, and long-term use will damage the passivation layer on the metal surface; although acidic toilet cleaners can dissolve water scale, they cause irreversible damage to carbonate materials such as marble.

[0005] Insufficient environmental protection performance

[0006] Traditional cleaning agents generally use surfactants that are difficult to degrade (such as LAS) and high-VOC solvents (such as ethylene glycol ethers). The biodegradation rate is lower than 60%, and it is easy to pollute water bodies through wastewater. The EU "Cleaning Agent Directive" (EC 648 / 2004) has clearly restricted the VOC content and biodegradability, but most commercially available products still do not meet the standards.

[0007] Limitations of single functionality

[0008] Existing cleaning agents are usually designed for specific scenarios. For example, kitchen oil stain cleaning agents lack the ability to handle water scale, and industrial cleaning agents cannot take into account antibacterial protection. For example, traditional industrial metal cleaning agents mostly have strong acid formulations. Although they can remove oil stains, they cannot inhibit the growth of bacteria and corrode equipment.

[0009] Defects in process design

[0010] In the preparation process of some products, key parameters (such as temperature, mixing order) are not controlled, resulting in the decomposition of active ingredients or poor compatibility. For example, the structure of heat-sensitive surfactants may be damaged during the high-temperature dissolution stage, affecting the stability of the final product.

[0011] Technical contributions of the present invention:

[0012] To address the above problems, the present invention has achieved a synergistic breakthrough in high-efficiency decontamination, material protection, and environmental friendliness through innovative formulation design (triple mechanisms of alkaline saponification + solvent dissolution + emulsification dispersion), screening of environmentally friendly ingredients (biodegradation rate ≥ 90%), and process optimization (precise temperature control, stepwise mixing). Compared with the prior art, while maintaining an oil stain removal rate ≥ 95%, the present invention stabilizes the pH value within the weak alkaline range of 9 - 10, and significantly reduces metal corrosion through corrosion inhibitors such as benzotriazole, making it suitable for the hard surface cleaning needs of multiple scenarios. Summary of the Invention

[0013] The present invention provides a hard surface oil stain cleaner and its preparation method to solve the problems of the prior art.

[0014] To solve the above technical problems, the present invention is achieved through the following technical solutions: In the first aspect, a hard surface oil stain cleaner contains the following components by weight percentage:

[0015] Sodium hydroxide 1% - 2%;

[0016] DB solvent 2.5%;

[0017] Triethanolamine 2%;

[0018] JFC - 2 2%;

[0019] Isomeric alcohol ether 1%;

[0020] Fatty alcohol polyoxyethylene ether AEO - 9 2%;

[0021] Benzotriazole 1%;

[0022] Special fatty alcohol ethoxylate 1%;

[0023] Fragrance 1%;

[0024] AkzoNobel 226SA 1.5%;

[0025] The balance is water.

[0026] In this application, it specifically includes:

[0027] Synergistic action mechanism of the formulation composition

[0028] (I) Construction of the alkaline system

[0029] Sodium hydroxide (1% - 2%): A strong alkaline environment provides the conditions for the saponification reaction, hydrolyzing animal and vegetable oils and fats into water-soluble soaps.

[0030] Triethanolamine (2%): As an organic base, it adjusts the pH value, and at the same time complexes with metal ions to prevent precipitation, and also has an emulsifying function.

[0031] (2) Solvent System

[0032] DB Solvent (2.5%): Dipropylene glycol butyl ether is used as a low-toxic solvent to dissolve mineral oil and high-molecular-weight grease

[0033] Isoalcohol Ether (1%): Iso-tridecanol polyoxyethylene ether enhances solvent compatibility and reduces the surface tension to ≤ 30 mN / m

[0034] (3) Surfactant Blending

[0035] Non-ionic System:

[0036] JFC-2 (2%): Alcohol polyoxyethylene ether penetrant quickly wets the oil stain

[0037] AEO-9 (2%): Alcohol polyoxyethylene ether enhances emulsifying and dispersing ability

[0038] Anionic System:

[0039] AkzoNobel 226SA (1.5%): Sodium alcohol polyoxyethylene ether sulfate provides strong detergency and hard water resistance

[0040] Special Surfactant:

[0041] Special fatty alcohol ethoxylate (1%): C12-14 chain segment optimizes wettability and improves the cleaning effect on smooth surfaces such as glass

[0042] (4) Auxiliary Functional Ingredients

[0043] Benzotriazole (1%): Copper alloy corrosion inhibitor to protect bathroom hardware

[0044] Fragrance (1%): Covers the alkaline odor and provides a pleasant user experience

[0045] Water (balance): Serves as a dispersion medium and adjusts the product viscosity

[0046] Scientific Design of the Preparation Process

[0047] (1) Temperature Control

[0048] Dissolution Stage at 40 - 50°C: Promotes the rapid dissolution of sodium hydroxide and triethanolamine, avoiding excessive local concentration

[0049] Addition Stage below 30°C: Protects the structural integrity of heat-sensitive ingredients (fragrance, surfactant)

[0050] (2) Mixing Process

[0051] Homogeneous Dispersion (10 - 15 minutes): Ensures the formation of a stable micelle structure between the solvent and the surfactant

[0052] Step-by-step addition: dissolve the alkaline substance first, then add the solvent and surfactant, and finally add the functional ingredients

[0053] (III) Post-processing

[0054] pH adjustment: Precisely controlled at 9-10 to ensure a balance between alkaline cleaning performance and material compatibility

[0055] Filtration and packaging: 0.45μm filter element removes possible impurities

[0056] Functional expansion direction of improved formula

[0057] (I) Enhanced scale removal

[0058] Sodium citrate (0.5%-1%): integrates calcium and magnesium ions, inhibits scale formation and decomposes existing scale

[0059] (II) Improved antibacterial performance

[0060] Benzalkonium chloride (0.3%-0.5%): Cationic surfactant destroys bacterial cell membranes and achieves 99.9% antibacterial rate

[0061] (III) Enhanced metal protection

[0062] Disodium EDTA (0.2%-0.4%): complexes metal ions to prevent oxidation corrosion, especially suitable for stainless steel equipment

[0063] Comprehensive performance advantages

[0064] Decontamination efficiency: Through the triple mechanism of solvent dissolution + surfactant emulsification + alkaline saponification, the oil removal rate is ≥ 95%

[0065] Material compatibility: pH value is controlled at 9-10, suitable for sensitive materials such as glass and ceramics

[0066] Environmental protection characteristics: biodegradation rate ≥ 90%, in line with EU Ecolabel standards

[0067] Usage scenario: The original liquid is suitable for heavy oil pollution. After dilution, it can be used for daily cleaning. It can improve the efficiency of industrial cleaning with ultrasonic equipment.

[0068] Through precise ingredient ratios, scientific process design and flexible functional expansion, a multi-dimensional synergistic hard surface cleaning system has been constructed. It takes into account material protection and environmental friendliness while maintaining high cleaning power, and has significant technological innovation value and market application potential.

[0069] In a specific embodiment of the first aspect, the DB solvent is dipropylene glycol butyl ether.

[0070] In a specific embodiment of the first aspect, the isomeric alcohol ether is isomeric tridecyl alcohol polyoxyethylene ether.

[0071] In a specific embodiment of the first aspect, the special fatty alcohol ethoxylate is C12-14 fatty alcohol ethoxylate.

[0072] In a specific embodiment of the first aspect, Akzo 226SA is sodium lauryl ether sulfate.

[0073] In a specific embodiment of the first aspect, the synergistic effect of each component in the formulation enables the product to have:

[0074] Oil removal rate ≥ 95% (under standard test conditions)

[0075] Surface tension ≤ 30 mN / m

[0076] pH value 9 - 10

[0077] Biodegradation rate ≥ 90%.

[0078] In the second aspect, a preparation method of a hard surface oil stain cleaner includes the following steps:

[0079] S1: Add water to the reaction kettle and heat up to 40 - 50 °C;

[0080] S2: Add sodium hydroxide and triethanolamine in sequence and stir until completely dissolved;

[0081] S3: Add DB solvent, JFC-2, isomeric alcohol ether, AEO-9, and homogenize and disperse for 10 - 15 minutes;

[0082] S4: Cool down to below 30 °C, and add benzotriazole, special fatty alcohol ethoxylate, essence, Akzo 226SA;

[0083] S5: Adjust the pH value to 9 - 10 and make up deionized water to 100%;

[0084] S6: Filter and then package.

[0085] In a specific embodiment of the second aspect, the hard surface includes:

[0086] Kitchen stoves, range hoods and other areas with heavy oil stains

[0087] Bathroom tiles, sanitary wares and other mixed surfaces of water scale and oil stains

[0088] Oil stains on the metal surface of industrial equipment

[0089] Surfaces of sensitive materials such as glass and ceramics.

[0090] In a specific embodiment of the second aspect, when the cleaning agent is used, it can be:

[0091] Direct spraying of the undiluted solution

[0092] Use after dilution at 1:5 - 10

[0093] In cooperation with ultrasonic cleaning equipment.

[0094] In the third aspect, an improved formula of a hard surface oil stain cleaning agent is characterized by adding:

[0095] 0.5% - 1% sodium citrate to enhance the ability to remove water scale;

[0096] 0.3% - 0.5% benzalkonium chloride to improve antibacterial performance;

[0097] 0.2% - 0.4% disodium EDTA to enhance metal protection.

[0098] The beneficial effects of the present invention are as follows:

[0099] 1. Through the triple synergistic mechanism of alkaline saponification, solvent dissolution, and surfactant emulsification, the present invention achieves a leading level in the industry with an oil stain removal rate ≥ 95%. Among them, the compound system of dipropylene glycol butyl ether (DB solvent) and isomeric tridecyl alcohol polyoxyethylene ether significantly reduces the surface tension to ≤ 30 mN / m, enabling the cleaning agent to quickly penetrate the microporous structure and peel off stubborn oil stains. At the same time, the pH value is precisely controlled in the weak alkaline range of 9 - 10, and in combination with the metal protection formula of benzotriazole and disodium EDTA, it ensures that the product has no corrosion on metal materials such as stainless steel and aluminum alloy, as well as sensitive surfaces such as glass and ceramics, achieving a balance between efficient cleaning and material protection;

[0100] 2. The product uses surfactants with a biodegradation rate ≥ 90% and a low VOC solvent system, meeting the EU Ecolabel standard and significantly reducing the environmental burden. Through flexible formula expansion (such as adding sodium citrate to enhance the ability to remove water scale, or benzalkonium chloride to improve antibacterial performance), the cleaning agent can adapt to the requirements of multiple scenarios such as heavy oil stains in the kitchen, mixed water scale and oil stains in the bathroom, and metal surfaces of industrial equipment. In addition, the multiple usage methods of direct spraying of the undiluted solution, dilution for use, and cooperation with ultrasonic equipment further enhance the practicality and economy of the product in the fields of household cleaning and industrial maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0101] Figure 1 It is a schematic diagram of the preparation process of the present invention.

[0102] Figure 2 It is a schematic diagram showing the functional expansion of the improved formula of the present invention.

[0103] Figure 3It is a schematic diagram for performance comparison of the present invention. Detailed implementation mode

[0104] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0105] As Figures 1 to 3 shown, a hard surface oil stain cleaner and its preparation method.

[0106] Implementation of technical solution

[0107] Raw material selection:

[0108] The alkaline substance is selected as flaky NaOH (purity ≥ 98%) and triethanolamine (pharmaceutical grade)

[0109] The surfactant is food contact grade AEO-9 and 226SA

[0110] The solvent system is selected as low-VOC dipropylene glycol butyl ether (DB solvent)

[0111] Process parameter control:

[0112] The temperature in the dissolution stage is strictly controlled at 45 ± 2 °C

[0113] Homogeneous dispersion is carried out by high-speed shearing at 3000 rpm

[0114] The final product is filtered through a 0.45 μm microporous filter

[0115] Performance detection standard:

[0116] Oil stain removal rate: Tested according to the standard of GB / T 13174-2008

[0117] Surface tension: Platinum plate method of GB / T 22237-2008

[0118] Biodegradation rate: OECD 301B rapid biodegradation test

[0119] Implementation of key technologies

[0120] Multi-phase collaborative cleaning system:

[0121] Alkaline saponification (NaOH) + solvent dissolution (DB solvent) + emulsification dispersion (AEO-9 / 226SA) triple mechanism

[0122] Penetrant JFC-2 and isomeric alcohol ethers form a gradient wetting layer to improve the microporous penetration efficiency. Material compatibility control:

[0123] Benzotriazole and disodium EDTA are compounded to form a metal protective film

[0124] pH buffer system (triethanolamine / NaOH) stabilizes the pH at 9.5 ± 0.3

[0125] Environmental performance optimization:

[0126] Select surfactants with a biodegradation rate ≥ 90%

[0127] The VOC content of the solvent system is < 50 g / L (EU Cleaner Directive EC 648 / 2004 standard)

[0128] Examples

[0129] Example 1: Standard formula cleaner (for kitchen use)

[0130] Formulation composition (weight percentage):

[0131] NaOH 1.5%

[0132] DB solvent (dipropylene glycol butyl ether) 2.5%

[0133] Triethanolamine 2%

[0134] JFC-2 2%

[0135] Isomeric tridecyl alcohol polyoxyethylene ether 1%

[0136] AEO-9 2%

[0137] Benzotriazole 1%

[0138] C12-14 fatty alcohol ethoxylate 1%

[0139] Fragrance 1%

[0140] 226SA 1.5%

[0141] Deionized water 84.5%

[0142] Preparation steps:

[0143] Add 80% deionized water to the reaction kettle, heat up to 45°C, add NaOH and triethanolamine in sequence, stir for 10 minutes until dissolved, add DB solvent, JFC-2, isomeric alcohol ether, and AEO-9, homogenize at high speed for 15 minutes, cool down to 25°C, add the remaining components, and make up deionized water to 100%

[0144] Adjust the pH to 9.5, filter and pack

[0145] Performance test results:

[0146] Peanut oil removal rate: 97.3% (standard test)

[0147] Surface tension: 28.7 mN / m

[0148] Corrosion to 304 stainless steel: Grade 0 (GB / T 13176.2 - 1991)

[0149] Biodegradation rate: 92.5% (28 - day test)

[0150] Example 2: Scale - enhanced cleaner (for bathroom)

[0151] Formulation improvement:

[0152] Add 0.8% sodium citrate based on the basic formulation

[0153] Adjust 226SA to 1.8%

[0154] Key performance improvement:

[0155] Calcium carbonate scale removal rate: 89.6% (37% improvement compared to the basic formulation)

[0156] Hard water stability: Remains transparent in 300 ppm CaCO3 solution. Influence on the gloss of ceramic glaze: ΔE*ab = 0.9 (color difference is negligible)

[0157] Example 3: Industrial equipment cleaner (for metals)

[0158] Formulation improvement:

[0159] Add 0.3% benzalkonium chloride

[0160] Add 0.3% disodium EDTA

[0161] Adjust DB solvent to 3.0%

[0162] Special performance verification:

[0163] Cutting fluid oil stain removal rate: 98.1% (ISO 13007 standard). Corrosion to aluminum alloy: Grade 0 (ASTM D665 Method A). Antibacterial rate (Escherichia coli): 99.99% (QB / T 2738 - 2012). Comparison of implementation effects

[0164] Performance indicators Example 1 Example 2 Example 3 Oil removal rate 97.3％ 96.8％ 98.1％ Scale removal rate 53.2％ 89.6％ 61.5％ Antibacterial rate None None 99.99％ Biodegradation rate 92.5％ 91.2％ 90.3％ Applicable materials General Ceramics Metal

[0165] Application scenario implementation examples

[0166] Kitchen range hood cleaning:

[0167] Let it stand for 5 minutes after spraying the stock solution.

[0168] Wipe with a scouring pad, and the grease dissolution rate increases by 40%.

[0169] The residue on the metal surface after cleaning < 0.1 mg / cm 2

[0170] Cleaning of bathroom tiles: 1:5 dilution solution with a high-pressure water gun

[0171] The scale removal speed increases by 2 times.

[0172] The surface glossiness after cleaning is restored to over 95%.

[0173] Cleaning of industrial milling machines:

[0174] Stock solution with an ultrasonic cleaner (40 kHz)

[0175] The oil stain removal time is shortened to 15 minutes.

[0176] The insulation resistance retention rate of the equipment surface > 98%

[0177] Through precise formula design, strict process control and scientific performance verification, this patent has achieved a technological breakthrough in the field of hard surface cleaning. The data of the examples show that the product has achieved an excellent balance among high-efficiency cleaning, material protection and environmental friendliness, and has significant implementation value and market competitiveness.

[0178] Design of the comparative experimental group

[0179] Selection of the control group

[0180] Select 3 typical commercially available hard surface cleaners as the control:

[0181] Control A: A kitchen oil stain cleaner of an international brand (alkaline formula, containing surfactants);

[0182] Control B: A domestic multi-functional cleaner (neutral formula, containing sodium citrate);

[0183] Control C: An industrial-grade metal cleaning agent (strong acid formula, containing phosphates).

[0184] Test items

[0185] Oil stain removal rate (GB / T 13174 - 2008 standard)

[0186] Surface tension (GB / T 22237 - 2008 platinum plate method)

[0187] pH value stability (tested after storing at 25°C for 3 months)

[0188] Material Corrosion Resistance (304 Stainless Steel Sheet / Ceramic Tile Immersion Test)

[0189] Biodegradation Rate (OECD 301B Quick Test)

[0190] Comparison of Experimental Results

[0191] 1. Comparison of Basic Properties

[0192]

[0193]

[0194] Material Compatibility Test

[0195]

[0196]

[0197] Experimental Conclusion

[0198] Detergency Performance:

[0199] The removal rates of the cleaning agent of the present invention for vegetable and animal oils (peanut oil) and mineral oils (cutting fluid) are significantly better than those of Control A and Control B, and slightly higher than those of the acidic industrial cleaning agent Control C.

[0200] In Example 2, by adding sodium citrate, the scale removal rate is increased by 44% compared with Control B.

[0201] Environmental Protection Characteristics:

[0202] The biodegradation rate reaches 92.5%, which is much higher than those of Control A (65.3%) and Control C (38.7%), meeting the EU ecological label standard.

[0203] The surface tension is 28.7 mN / m, lower than that of all control products, and the penetration and detergency ability is stronger.

[0204] Material Compatibility:

[0205] The neutral / weak alkaline formula (pH 9.5) has no corrosion on materials such as stainless steel and ceramics, which is better than the strong alkaline Control A (pH 10.2) and the strong acidic Control C (pH 2.5).

[0206] In Example 3, by adding disodium EDTA, the protection performance for aluminum alloy is increased by 50%.

[0207] Usage Scenarios:

[0208] The general-purpose formula of Example 1 shows the best performance in cleaning heavy kitchen oil stains, and the cleaning efficiency is 30% faster than that of Control A.

[0209] The industrial formulation of Example 3 can replace traditional strong acid cleaners, reducing the risk of equipment corrosion.

[0210] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hard surface oil stain cleaner, characterized in that, It contains the following components by weight percentage: Sodium hydroxide 1%-2%; DB solvent 2.5%; Triethanolamine 2%; JFC-2 2%; Isoalcohol ether 1%; Fatty alcohol polyoxyethylene ether AEO-9 2%; Benzotriazole 1%; Special fatty alcohol ethoxylate 1%; Fragrance 1%; Akesu 226SA 1.5%; The balance is water.

2. The hard surface oil stain cleaner according to claim 1, characterized in that: The DB solvent is dipropylene glycol butyl ether.

3. The hard surface oil stain cleaner according to claim 1, characterized in that: The isoalcohol ether is isotridecyl alcohol polyoxyethylene ether.

4. The hard surface oil stain cleaner according to claim 1, characterized in that: The special fatty alcohol ethoxylate is C12-14 fatty alcohol ethoxylate.

5. The hard surface oil stain cleaner according to claim 1, wherein: The said Aksu 226SA is sodium alcohol polyoxyethylene ether sulfate.

6. A hard surface oil stain cleaner according to any one of claims 1-5, characterized in that: The synergistic effect of each component in the formulation makes the product have: Oil stain removal rate ≥95% (under standard test conditions); Surface tension ≤30 mN / m; pH value 9-10; Biodegradation rate ≥90%.

7. A preparation method of a hard surface oil stain cleaner, characterized in that: It includes the following steps: S1: Add water to the reaction kettle and heat up to 40-50 °C; S2: Add sodium hydroxide and triethanolamine in sequence and stir until completely dissolved; S3: Add DB solvent, JFC-2, isoalcohol ether, AEO-9, and homogenize and disperse for 10-15 minutes; S4: Cool down to below 30℃, add benzotriazole, special fatty alcohol ethoxylate, flavor, Aksu 226SA; S5: Adjust the pH value to 9-10 and make up deionized water to 100%; S6: Filter and then package.

8. The preparation method of a hard surface oil stain cleaner according to claim 7, characterized in that: The hard surface includes: Kitchen stoves, range hoods and other areas with heavy oil stains; Bathroom tiles, sanitary wares and other surfaces with a mixture of water scale and oil stains; Oil stains on the metal surface of industrial equipment; Surfaces of sensitive materials such as glass and ceramics.

9. The preparation method of a hard surface oil stain cleaner according to claim 7, characterized in that: When using the cleaner, it can be used by: Directly spraying the undiluted solution; Using after dilution at 1:5-10; Cooperating with an ultrasonic cleaning device.

10. An improved formulation of a hard surface oil stain cleaner according to claim 1, characterized in that: It can be added with: 0.5%-1% sodium citrate to enhance the water scale removal ability; 0.3%-0.5% benzalkonium chloride to improve the antibacterial performance; 0.2%-0.4% disodium EDTA to enhance metal protection.

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