Non-flammable water-based aerosol composition for metal cleaning and polishing

Abstract

The present invention belongs to the technical field of cleaning aerosols, and in particular to a non-flammable water-based aerosol composition for metal cleaning and polishing. The non-flammable water-based aerosol composition of the present invention includes phase A and phase B, wherein the phase A includes the following raw materials and their mass fractions: 60-78 parts of deionized water, 1-10 parts of a composite emulsifier, 5-30 parts of white mineral oil, 1-10 parts of a detergent, 0.2-1 parts of an anticorrosive and rust-inhibiting agent, and 0.1-1 parts of an essence; the phase B is a propellant having a mass fraction of 20-40 parts. The non-flammable water-based aerosol composition of the present invention can effectively remove metal surface stains after use, while having a good brightening effect and being durable and non-stained with dust; and while maintaining the basic performance of cleaning and polishing metal, closely following national regulatory requirements, with safety and environmental protection as the main design concepts, eliminating flammable, explosive, toxic and harmful substances in existing products, and having the advantages of being non-flammable, safe and environmentally friendly.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning aerosols, and particularly relates to a non-flammable water-based aerosol composition for cleaning and polishing metals. Background Art

[0002] There are mainly two types of metal cleaning and polishing aerosols on the market: solvent-based and water-based. Solvent-based aerosols are mainly made of silicone oil, kerosene, isopropyl alcohol, etc. Due to excessive VOCs and flammability and explosiveness, they no longer meet current environmental protection requirements. They are outdated formula processes and are gradually being eliminated from the market. Mainstream water-based metal cleaning and polishing aerosols are mainly made of silicone oil, emulsifier, anti-corrosion and rust-proof agent, co-solvent, water and other raw materials, supplemented by propellant LPG or dimethyl ether. However, water-based metal cleaning and polishing aerosols have the following main disadvantages: (1) In order to increase the cleaning ability of stains, water-soluble organic solvents are added to the current water-based formula. Strictly speaking, it only reduces the VOC content, not zero VOC emissions, and is also environmentally harmful; (2) Since the aerosol cans of water-based aerosols are very easy to rust, the existing aerosol anti-corrosion and rust-proof agents generally use traditional sodium nitrite for rust prevention. Nitrite is cheap and has a good anti-rust effect, but it is a carcinogen and easily pollutes water quality, so it is not an environmentally friendly raw material; (3) Most aerosol metal cleaning and polishing agents use LPG or dimethyl ether as propellants. Both propellants are flammable and explosive substances. Even water-based products become hazardous chemicals due to the presence of these two propellants, which greatly reduces the safety of aerosols.

[0003] Chinese patent application CN108865519A discloses a cleaning aerosol comprising the following components in weight percentage: 25-80% composite solvent, comprising at least two organic solvents; 10-55% anhydrous ethanol; 0.1-0.5% corrosion inhibitor; and 8-45% propellant. The composite solvent is selected from at least two of D-limonene, terpinene, and terpinene. While this cleaning aerosol exhibits good cleaning performance, the large amount of organic solvents added to its formulation poses issues such as excessive VOC levels and environmental hazards. Chinese patent application CN103013448A discloses a water-based aerosol and its preparation method. The aerosol comprises the following components in weight parts: 15-30% propellant, 2-8% foaming agent, 0.2-0.3% sodium benzoate, 0.2-0.3% sodium nitrite, 67-77% deionized water, and 0-0.5% sodium hydroxide. The propellant is propane-butane. The foaming agent is one or more of anionic surfactant sodium oleate / fatty alcohol polyoxyethylene ether or nonionic surfactant nonylphenol polyoxyethylene ether / alkyl glycoside. The aerosol uses propane and butane as propellants, which has safety issues. Summary of the Invention

[0004] In response to the shortcomings of the prior art, the present invention aims to provide a non-flammable water-based aerosol composition for metal cleaning and polishing. The non-flammable water-based aerosol composition for metal cleaning and polishing provided by the present invention can effectively remove stains on metal surfaces while also providing a good brightening effect and a long-lasting dust-free finish. Furthermore, while maintaining the basic performance of metal cleaning and polishing, the non-flammable water-based aerosol composition for metal cleaning and polishing provided by the present invention closely follows national regulatory requirements, adopts safety and environmental protection as primary design concepts, and eliminates flammable, explosive, toxic, and harmful substances from existing products, resulting in the advantages of being non-flammable, safe, and environmentally friendly.

[0005] The technical solution of the present invention is:

[0006] A non-flammable water-based aerosol composition for metal cleaning and polishing comprises a phase A and a phase B. The phase A comprises the following raw materials and their weight fractions: 60-78 parts of deionized water, 1-10 parts of a compounded emulsifier, 5-30 parts of white mineral oil, 1-10 parts of a detergent, 0.2-1 parts of an anticorrosion and rust preventive, and 0.1-1 parts of an essence. The phase B is a propellant in 20-40 parts by weight.

[0007] Furthermore, the non-flammable water-based aerosol composition for metal cleaning and polishing, the phase A includes the following raw materials and their mass fractions: 75.8 parts of deionized water, 4 parts of compound emulsifier, 15 parts of white mineral oil, 4 parts of detergent, 0.8 parts of anticorrosion and rust inhibitor, and 0.4 parts of fragrance; the phase B is a propellant with a mass fraction of 40 parts.

[0008] Furthermore, the compound emulsifier includes emulsifier S-80 and emulsifier YH-318.

[0009] Furthermore, the mass ratio of emulsifier S-80 to emulsifier YH-318 in the compound emulsifier is 1:5-8.

[0010] Furthermore, the mass ratio of emulsifier S-80 to emulsifier YH-318 in the compound emulsifier is 1:6.

[0011] Furthermore, the cleaning agent includes fatty alcohol polyoxyethylene ether and surfactant Berol-226SA.

[0012] Furthermore, the mass ratio of the fatty alcohol polyoxyethylene ether to the surfactant Berol-226SA in the cleaning agent is 7-11:2-4.

[0013] Furthermore, the mass ratio of fatty alcohol polyoxyethylene ether to surfactant Berol-226SA in the cleaning agent is 8:3.

[0014] Furthermore, the anticorrosion and rust inhibitors include borate and benzoate.

[0015] Furthermore, the mass ratio of borate to benzoate in the anti-corrosion and rust inhibitor is 2-3:4-7.

[0016] Furthermore, the mass ratio of borate to benzoate in the anti-corrosion and rust inhibitor is 3:5.

[0017] Furthermore, the borate is triethanolamine borate.

[0018] Furthermore, the benzoate is sodium benzoate.

[0019] Furthermore, the propellant is one or two of R-134a, R-1234YF, and N2.

[0020] In addition, the present invention also provides a method for preparing a non-flammable water-based aerosol composition for metal cleaning and polishing, comprising the following steps:

[0021] First, add deionized water and compound emulsifier into the mixing tank in sequence, add white mineral oil while stirring, stir and emulsify for 20-40 minutes, then add detergent, anticorrosion and rust inhibitor, and essence in sequence, stir for 20-40 minutes to obtain the metal cleaning and polishing agent stock solution, then put the stock solution into the tinplate aerosol can, install the valve, then fill in the propellant, and then install the nozzle and cover.

[0022] In the metal cleaning industry, a simple compound system or a raw material that improves the performance of the original system is a major breakthrough in the original system. In the present invention, the compound emulsifier composed of emulsifier S-80 and emulsifier YH-318 can not only emulsify white mineral oil well and enhance the ability to remove stains on metal surfaces, but also synergize with the detergent composed of surfactants to further improve the cleaning power and make the system more stable. The detergent composed of fatty alcohol polyoxyethylene ether AEO-9 and surfactant Berol-226SA can completely remove organic solvents and can effectively remove oil, dust and other stains on metal surfaces, achieving zero VOC emissions while ensuring cleaning power.

[0023] The present invention utilizes a independently developed novel rust-proofing system—a borate + benzoate rust-proofing system. This anticorrosive and rust-proofing agent, composed of triethanolamine borate and sodium benzoate, provides excellent rust and corrosion protection for tinplate cans. While maintaining this rust-proofing effect, it eliminates the outdated and harmful traditional nitrite system, meeting environmental regulations. The present invention utilizes one or a combination of R-134a, R-1234YF, and N2 as a propellant, providing sufficient projectile pressure for ejection while remaining non-flammable. This makes it a perfect alternative to commonly used flammable and explosive propellants such as propane-butane mixture (LPG) and dimethyl ether, eliminating flammability and explosion issues.

[0024] The present invention discloses a non-flammable water-based aerosol composition for metal cleaning and polishing, which is prepared from white mineral oil, an emulsifier, a detergent, an anticorrosive and rust-preventive agent, deionized water, an essence, and a non-flammable propellant. The components cooperate with each other and can effectively remove stains on the metal surface after use. At the same time, it has a good brightening effect and is long-lasting and dust-resistant. It also has the advantages of being non-flammable, safe, and environmentally friendly. It is a new generation of metal cleaning and polishing product.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] (1) The non-flammable water-based aerosol composition for metal cleaning and polishing provided by the present invention can effectively remove stains on the metal surface after use, and at the same time has a good brightening effect and is long-lasting and dust-free.

[0027] (2) The non-flammable water-based aerosol composition for metal cleaning and polishing provided by the present invention not only maintains the basic performance of cleaning and polishing metals, but also follows the requirements of national laws and regulations. The VOC content meets the national environmental protection requirements. It takes safety and environmental protection as the main design concepts, eliminates flammable, explosive, toxic and harmful substances in existing products, and has the advantages of being non-flammable, safe and environmentally friendly. It is a new generation of metal cleaning and polishing products. DETAILED DESCRIPTION

[0028] The present invention is further illustrated below by describing specific implementation methods, but this is not intended to limit the present invention. Those skilled in the art can make various modifications or improvements based on the basic ideas of the present invention, but as long as they do not deviate from the basic ideas of the present invention, they are all within the scope of the present invention.

[0029] Unless otherwise specified, the raw materials used in the present invention are commercially available.

[0030] The purchasing information of each raw material in the following examples and comparative examples is shown in Table 1.

[0031] Table 1: Purchase information of each raw material

[0032] raw material factory Emulsifier S-80 Croda Chemicals Ltd. Emulsifier YH-318 Zhengzhou Yihe Fine Chemicals Co., Ltd. Fatty alcohol polyoxyethylene ether AEO-9 Croda Chemicals Ltd. Surfactant Berol-226SA Nouryon Chemicals Co., Ltd.

[0033] Example 1: A non-flammable water-based aerosol composition for metal cleaning and polishing

[0034] The non-flammable water-based aerosol composition for metal cleaning and polishing comprises a phase A and a phase B. The phase A comprises the following raw materials and their weight proportions: 60 parts of deionized water, 8.7 parts of a compound emulsifier, 30 parts of white mineral oil, 1 part of a detergent, 0.2 parts of an anticorrosion and rust preventive, and 0.1 parts of lemon essence. The phase B is a propellant in 20 parts by weight. The compound emulsifier comprises emulsifier S-80 and emulsifier YH-318 in a weight ratio of 1:5. The detergent comprises fatty alcohol polyoxyethylene ether AEO-9 and surfactant Berol-226SA in a weight ratio of 7:4. The anticorrosion and rust preventive comprises triethanolamine borate and sodium benzoate in a weight ratio of 2:7. The propellant is R-134a.

[0035] The preparation method of the non-flammable water-based aerosol composition for metal cleaning and polishing is as follows:

[0036] First, add deionized water and compound emulsifier into the mixing tank in sequence, add white mineral oil while stirring, stir and emulsify for 20 minutes, then add detergent, anticorrosion and rust inhibitor, and lemon essence in sequence, stir for 20 minutes to obtain the metal cleaning and polishing agent stock solution, then fill the stock solution into the tinplate aerosol can, install the valve, fill it with propellant, and then install the nozzle and cover.

[0037] Example 2: A non-flammable water-based aerosol composition for metal cleaning and polishing

[0038] The non-flammable water-based aerosol composition for metal cleaning and polishing comprises a phase A and a phase B. The phase A comprises the following raw materials and their weight proportions: 78 parts of deionized water, 5 parts of a compound emulsifier, 5 parts of white mineral oil, 10 parts of a detergent, 1 part of an anticorrosion and rust preventive, and 1 part of lemon essence. The phase B is a propellant in 40 parts by weight. The compound emulsifier comprises emulsifier S-80 and emulsifier YH-318 in a weight ratio of 1:8. The detergent comprises fatty alcohol polyoxyethylene ether AEO-9 and surfactant Berol-226SA in a weight ratio of 11:2. The anticorrosion and rust preventive comprises triethanolamine borate and sodium benzoate in a weight ratio of 3:4. The propellant comprises R-1234YF and N2 in a weight ratio of 4:1.

[0039] The preparation method of the non-flammable water-based aerosol composition for metal cleaning and polishing is as follows:

[0040] First, add deionized water and compound emulsifier into the mixing tank in sequence, add white mineral oil while stirring, stir and emulsify for 40 minutes, then add detergent, anticorrosion and rust inhibitor, and lemon essence in sequence, stir for 40 minutes to obtain the metal cleaning and polishing agent stock solution, then fill the stock solution into the tinplate aerosol can, install the valve, fill it with propellant, and then install the nozzle and cover.

[0041] Example 3: A non-flammable water-based aerosol composition for metal cleaning and polishing

[0042] The non-flammable water-based aerosol composition for metal cleaning and polishing comprises: phase A comprising the following raw materials and their weight fractions: 75.8 parts of deionized water, 4 parts of a compounded emulsifier, 15 parts of white mineral oil, 4 parts of a detergent, 0.8 parts of an anticorrosion and rust preventive, and 0.4 parts of lemon essence; phase B comprising 40 parts of a propellant; the compounded emulsifier comprising emulsifier S-80 and emulsifier YH-318 in a weight ratio of 1:6; the detergent comprising fatty alcohol polyoxyethylene ether AEO-9 and surfactant Berol-226SA in a weight ratio of 8:3; the anticorrosion and rust preventive comprising triethanolamine borate and sodium benzoate in a weight ratio of 3:5; and the propellant comprising R-1234YF and N2 in a weight ratio of 3:2.

[0043] The preparation method of the non-flammable water-based aerosol composition for metal cleaning and polishing is as follows:

[0044] First, add deionized water and compound emulsifier into the mixing tank in sequence, add white mineral oil while stirring, stir and emulsify for 30 minutes, then add detergent, anticorrosion and rust inhibitor, and lemon essence in sequence, stir for 30 minutes to obtain the metal cleaning and polishing agent stock solution, then fill the stock solution into the tinplate aerosol can, install the valve, fill it with propellant, and then install the nozzle and cover.

[0045] Comparative Example 1: A non-flammable water-based aerosol composition for metal cleaning and polishing

[0046] The non-flammable water-based aerosol composition for metal cleaning and polishing comprises: phase A comprising the following raw materials and their weight fractions: 75.8 parts of deionized water, 4 parts of a compounded emulsifier, 15 parts of white mineral oil, 4 parts of a detergent, 0.8 parts of an anticorrosion and rust preventive, and 0.4 parts of lemon essence; phase B comprising 40 parts of a propellant; the compounded emulsifier comprising emulsifiers S-80 and T-80 in a weight ratio of 1:6; the detergent comprising fatty alcohol polyoxyethylene ether AEO-9 and surfactant Berol-226SA in a weight ratio of 8:3; the anticorrosion and rust preventive comprising triethanolamine borate and sodium benzoate in a weight ratio of 3:5; and the propellant comprising R-1234YF and N2 in a weight ratio of 3:2.

[0047] The preparation method of the non-flammable water-based aerosol composition for metal cleaning and polishing is similar to that of Example 3.

[0048] The difference from Example 3 is that the emulsifier YH-318 is replaced by T-80.

[0049] Comparative Example 2: A non-flammable water-based aerosol composition for metal cleaning and polishing

[0050] The non-flammable water-based aerosol composition for metal cleaning and polishing comprises: phase A comprising the following raw materials and their weight fractions: 75.8 parts of deionized water, 4 parts of a compounded emulsifier, 15 parts of white mineral oil, 4 parts of a detergent, 0.8 parts of an anticorrosion and rust preventive, and 0.4 parts of lemon essence; phase B comprising 40 parts of a propellant; the compounded emulsifier comprising emulsifier S-80 and emulsifier YH-318 in a weight ratio of 6:1; the detergent comprising fatty alcohol polyoxyethylene ether AEO-9 and surfactant Berol-226SA in a weight ratio of 8:3; the anticorrosion and rust preventive comprising triethanolamine borate and sodium benzoate in a weight ratio of 3:5; and the propellant comprising R-1234YF and N2 in a weight ratio of 3:2.

[0051] The preparation method of the non-flammable water-based aerosol composition for metal cleaning and polishing is similar to that of Example 3.

[0052] The difference from Example 3 is that the compound emulsifier consists of emulsifier S-80 and emulsifier YH-318 in a mass ratio of 6:1.

[0053] Comparative Example 3: A non-flammable water-based aerosol composition for metal cleaning and polishing

[0054] The non-flammable water-based aerosol composition for metal cleaning and polishing comprises: phase A comprising the following raw materials and their weight proportions: 75.8 parts of deionized water, 4 parts of a compounded emulsifier, 15 parts of white mineral oil, 4 parts of a detergent, 0.8 parts of an anticorrosion and rust preventive, and 0.4 parts of lemon essence; phase B comprising 40 parts of a propellant; the compounded emulsifier comprising emulsifier S-80 and emulsifier YH-318 in a weight ratio of 1:6; the detergent comprising a zwitterionic surfactant cocamidopropyl betaine CAB-35 and a surfactant Berol-226SA in a weight ratio of 8:3; the anticorrosion and rust preventive comprising triethanolamine borate and sodium benzoate in a weight ratio of 3:5; and the propellant comprising R-1234YF and N2 in a weight ratio of 3:2.

[0055] The difference from Example 3 is that the fatty alcohol polyoxyethylene ether AEO-9 is replaced by cocamidopropyl betaine.

[0056] Comparative Example 4: A non-flammable water-based aerosol composition for metal cleaning and polishing

[0057] The non-flammable water-based aerosol composition for metal cleaning and polishing comprises: phase A comprising the following raw materials and their weight fractions: 75.8 parts of deionized water, 4 parts of a compounded emulsifier, 15 parts of white mineral oil, 4 parts of a detergent, 0.8 parts of an anticorrosion and rust preventive, and 0.4 parts of lemon essence; phase B comprising 40 parts of a propellant; the compounded emulsifier comprising emulsifier S-80 and emulsifier YH-318 in a weight ratio of 1:6; the detergent comprising fatty alcohol polyoxyethylene ether AEO-9 and surfactant Berol-226SA in a weight ratio of 8:3; the anticorrosion and rust preventive comprising sodium metasilicate and sodium benzoate in a weight ratio of 3:5; and the propellant comprising R-1234YF and N2 in a weight ratio of 3:2.

[0058] The preparation method of the non-flammable water-based aerosol composition for metal cleaning and polishing is similar to that of Example 3.

[0059] The difference from Example 3 is that triethanolamine borate is replaced by sodium metasilicate.

[0060] Test Example 1: Performance Test

[0061] The performance of the non-flammable water-based aerosol compositions for metal cleaning and polishing prepared in Examples 1, 2, and 3 of the present invention were tested. The relevant test methods, requirements, and test results are shown in Table 2.

[0062] Table 2: Performance test results

[0063]

[0064]

[0065] As can be seen from Table 2, the moisture and volatiles are primarily composed of water and a small amount of water carried by the cleaning agent. The pH is primarily influenced by the anticorrosion and rust inhibitor; the less anticorrosion and rust inhibitor, the lower the pH. The pressure is primarily determined by the propellant; the more propellant, the greater the pressure. Airtightness is influenced by the tightness of the aerosol seal and the valve gasket. The ejection rate is primarily related to the ratio of material to propellant: more material and less propellant will reduce the ejection rate, while a lower ratio will increase it. As can be seen from Table 2, the non-flammable water-based aerosol composition for metal cleaning and polishing prepared by the present invention is of excellent quality and meets relevant standards.

[0066] Test Example 2: Cleaning Power Test

[0067] The cleaning power of the non-flammable water-based aerosol composition for metal cleaning and polishing prepared in Example 3 of the present invention and the non-flammable water-based aerosol compositions for metal cleaning and polishing prepared in Comparative Examples 1, 2, and 3 were tested with reference to QB / T 2117. The cleaning power test results are shown in Table 3.

[0068] Table 3: Cleaning power test results

[0069]

[0070] As can be seen from Table 3, the non-flammable water-based aerosol composition for metal cleaning and polishing prepared in Example 3 of the present invention has a cleaning power of up to 93%, significantly higher than the non-flammable water-based aerosol compositions for metal cleaning and polishing prepared in Comparative Examples 1 and 2. This demonstrates that the emulsification system plays a crucial role in the cleaning effect of the product of the present invention. Only a composite emulsifier composed of emulsifier S-80 and emulsifier YH-318 in a certain mass ratio can achieve a better cleaning effect. The cleaning power of the non-flammable water-based aerosol composition for metal cleaning and polishing prepared in Example 3 of the present invention is significantly higher than that of the non-flammable water-based aerosol composition for metal cleaning and polishing prepared in Comparative Example 3. This demonstrates that the fatty alcohol polyoxyethylene ether AEO-9 and the surfactant Berol-226SA in the cleaning agent of the present invention interact with each other, achieving a more excellent cleaning effect in the system of the present invention.

[0071] Test Example 3: Anti-rust performance test

[0072] The performance of the non-flammable water-based aerosol composition for metal cleaning and polishing prepared in Example 3 of the present invention and the non-flammable water-based aerosol composition for metal cleaning and polishing prepared in Comparative Example 4 were tested. The relevant test methods, requirements, and test results are shown in Table 4.

[0073] Table 4: Anti-rust and anti-corrosion performance test results

[0074]

[0075] As can be seen from Table 4, the non-flammable water-based aerosol composition for metal cleaning and polishing prepared in Example 3 of the present invention showed no rust after storage at 50°C for 90 days, while the non-flammable water-based aerosol composition for metal cleaning and polishing prepared in Comparative Example 4 showed slight rust after storage at 50°C for 90 days. This shows that the non-flammable water-based aerosol composition for metal cleaning and polishing obtained in the present invention has more excellent rust prevention performance. This also indicates that the triethanolamine borate and sodium benzoate in the anti-corrosion and rust inhibitor of the present invention can interact with each other, and can exert more excellent rust prevention performance in the system of the present invention.

Claims

1. A non-flammable water-based aerosol composition for metal cleaning and polishing, comprising phase A and phase B, characterized in that: The phase A comprises the following raw materials and their weight fractions: 75.8 parts of deionized water, 4 parts of compound emulsifier, 15 parts of white mineral oil, 4 parts of detergent, 0.8 parts of anticorrosion and rust preventive, and 0.4 parts of lemon essence; the phase B is a propellant with a weight fraction of 40 parts; the compound emulsifier is composed of emulsifier S-80 and emulsifier YH-318 in a weight ratio of 1:6; the detergent is composed of fatty alcohol polyoxyethylene ether AEO-9 and surfactant Berol-226SA in a weight ratio of 8:3; the anticorrosion and rust preventive is composed of triethanolamine borate and benzyl alcohol The composition comprises sodium hydroxide and sodium chloride in a mass ratio of 3:5; the propellant comprises R-1234YF and N2 in a mass ratio of 3:2; and the preparation method of the non-flammable water-based aerosol composition for metal cleaning and polishing comprises the following steps: first, deionized water and a compound emulsifier are sequentially added into a stirring tank, white mineral oil is added while stirring, and after stirring and emulsifying for 30 minutes, a detergent, an anticorrosion and rust preventive, and lemon essence are sequentially added and stirred for 30 minutes to obtain a stock solution of the metal cleaning and polishing agent, and then the stock solution is loaded into a tinplate aerosol can, a valve is installed, the propellant is added, and then a nozzle and a lid are installed.

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