Antioxidant water-based emulsion as well as preparation method and application thereof

Abstract

The invention provides an antioxidant water-based emulsion as well as a preparation method and application thereof, and the water-based emulsion comprises the following raw materials in percentage by mass: 20-40% of naphthenic base oil, 1-4% of an antirust agent, 1-5% of an antioxidant, 1-5% of N, N-dimethylformamide and the balance of water. The cleaning agent is prepared from, by weight, 1%-5% of N, N-dimethylformamide, 1%-5% of tall oil diisopropanolamide, 1%-5% of oleic acid, 1%-5% of span 60, 2%-5% of NP-4, 0.5%-1.5% of fatty alcohol ether phosphate, 1%-5% of bactericide, 0.1%-1% of defoaming agent and the balance water. The antioxidant is composed of benzotriazole and tert-butylhydroquinone according to the mass ratio of (0.5-1): (1-3). Research finds that benzotriazole and tert-butylhydroquinone form an antioxidant according to the mass ratio of (1-3): (1-2), and then the antioxidant is compounded with other proper raw materials containing oleic acid, so that the oxidation resistance of the water-based emulsion can be effectively improved, a stable long-acting protective film is formed on the metal surface, the corrosion resistance and the anti-rust performance of the water-based emulsion are improved, and the service life of the water-based emulsion is prolonged. Moreover, deterioration is avoided after long-time use, and the shelf life is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of aqueous emulsions, and in particular relates to an antioxidant aqueous emulsion and a preparation method and application thereof. Background Art

[0002] Aqueous emulsion is a mixture of water, emulsifier, base oil (including mineral oil, vegetable oil or synthetic oil) and other additives. It is widely used in metal processing, textile, leather, papermaking, coating and other fields due to its unique properties. Especially in the field of metal processing, aqueous emulsion is often used as cutting fluid, coolant and lubricant to improve processing efficiency and workpiece quality.

[0003] When used for metal processing, how to form an effective protective film on the metal surface is very important for improving the corrosion and rust resistance of the aqueous emulsion. Summary of the invention

[0004] Based on this, the purpose of the present invention is to provide an antioxidant aqueous emulsion and a preparation method and application thereof, wherein the aqueous emulsion can form a stable and long-lasting protective film on the metal surface, effectively improving the corrosion resistance and rust resistance.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions.

[0006] The first aspect of the present invention provides an aqueous emulsion, comprising the following raw materials in mass fractions: 20% to 40% of cycloalkyl base oil, 1% to 4% of rust inhibitor, 1% to 5% of antioxidant, 1% to 5% of N,N-dimethylformamide, 1% to 5% of tall oil diisopropanolamide, 1% to 5% of oleic acid, 1% to 5% of Span 60, NP-42% to 5%, 0.5% to 1.5% of fatty alcohol ether phosphate, 1% to 5% of bactericide, 0.1% to 1% of defoamer, and the balance is water; the antioxidant is composed of benzotriazole and tert-butylhydroquinone in a mass ratio of (0.5 to 1):(1 to 3).

[0007] In some embodiments, the aqueous emulsion comprises the following raw materials in mass fractions: 25% to 35% cycloalkyl base oil, 1% to 3% rust inhibitor, 2% to 4% antioxidant, 1% to 5% N,N-dimethylformamide, 1% to 5% tall oil diisopropanolamide, 2% to 4% oleic acid, 1% to 5% Span 60, 2% to 5% NP-4, 0.5% to 1.5% fatty alcohol ether phosphate, 1% to 5% bactericide, 0.1% to 1% defoamer, and the balance is water.

[0008] In some embodiments, the antioxidant is composed of benzotriazole and tert-butylhydroquinone in a mass ratio of 1:(1-3).

[0009] In some embodiments, the antioxidant is composed of benzotriazole and tert-butylhydroquinone in a mass ratio of 1:(2-3).

[0010] In some embodiments, the rust inhibitor is selected from at least one of sodium carbonate and triethanolamine.

[0011] In some embodiments, the fungicide is selected from at least one of 5-methyloxazoline, phenylisothiazolinone, iodopropynylbutylcarbamate, phenoxyethanol, and methylisothiazolinone.

[0012] In some embodiments, the defoaming agent is selected from at least one of methyl silicone oil and dimethyl silicone oil.

[0013] The second aspect of the present invention provides a method for preparing the aqueous emulsion as described above, characterized in that it comprises the following steps: (1) taking the water, emulsifier, and cycloalkyl base oil in proportion and stirring them evenly; (2) adding the remaining raw materials, stirring them evenly, and filtering to obtain the aqueous emulsion.

[0014] The third aspect of the present invention provides the use of the aqueous emulsion as described above in the fields of metal processing, textiles, leather, papermaking, and coatings.

[0015] In some embodiments, the use includes use as a metal cutting fluid.

[0016] The invention provides an aqueous emulsion. The inventor combines his own experience and a large amount of research to prepare an antioxidant by mixing benzotriazole and tert-butylhydroquinone in a mass ratio of (1-3):(1-2), and then compounding the mixture with other suitable raw materials containing oleic acid. The antioxidant property of the aqueous emulsion can be effectively improved, a stable and long-lasting protective film can be formed on the metal surface, the corrosion resistance and rust resistance of the aqueous emulsion can be improved, and the aqueous emulsion will not deteriorate during long-term use, thereby extending the shelf life. DETAILED DESCRIPTION

[0017] For ease of understanding of the present invention, the present invention will be described more fully below with reference to the embodiments, and preferred embodiments of the present invention are given below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. The purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. It should be understood that the experimental methods in the following examples that do not specify specific conditions are usually based on conventional conditions or the conditions recommended by the manufacturer. The various commonly used reagents used in the embodiments are all commercially available products.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0019] Example 1

[0020] The present embodiment provides an aqueous emulsion, comprising the following raw materials in mass fractions: 35% of cycloalkane base oil, 3% of rust inhibitor (sodium carbonate), 3% of antioxidant, 3% of N,N-dimethylformamide, 2% of tall oil diisopropanolamide, 4% of oleic acid, 2% of Span 60, 3% of NP-4, 1% of fatty alcohol ether phosphate, 3% of bactericide (phenoxyethanol), 0.5% of defoamer (methyl silicone oil), and the balance is water; the antioxidant is composed of benzotriazole and tert-butylhydroquinone in a mass ratio of 1:2.5.

[0021] Example 2

[0022] The present embodiment provides an aqueous emulsion, comprising the following raw materials in mass fractions: 30% of cycloalkane base oil, 2% of rust inhibitor (sodium carbonate), 2% of antioxidant, 2% of N,N-dimethylformamide, 3% of tall oil diisopropanolamide, 2% of oleic acid, 4% of Span 60, 2% of NP-4, 1% of fatty alcohol ether phosphate, 2% of bactericide (phenoxyethanol), 1% of defoamer (methyl silicone oil), and the balance is water; the antioxidant is composed of benzotriazole and tert-butylhydroquinone in a mass ratio of 1:3.

[0023] Example 3

[0024] The present embodiment provides an aqueous emulsion, comprising the following raw materials in mass fractions: 25% of cycloalkane base oil, 1% of rust inhibitor (sodium carbonate), 5% of antioxidant, 5% of N,N-dimethylformamide, 1.5% of tall oil diisopropanolamide, 5% of oleic acid, 3% of Span 60, 3% of NP-4, 1.5% of fatty alcohol ether phosphate, 3% of bactericide (phenoxyethanol), 0.8% of defoamer (methyl silicone oil), and the balance is water; the antioxidant is composed of benzotriazole and tert-butylhydroquinone in a mass ratio of 1:2.

[0025] Comparative Example 1

[0026] This comparative example provides an aqueous emulsion, which is the same as Example 1 except that the antioxidant does not contain benzotriazole, and specifically comprises the following raw materials in mass fraction: 35% of cycloalkyl base oil, 3% of rust inhibitor (sodium carbonate), 3% of antioxidant, 3% of N,N-dimethylformamide, 2% of tall oil diisopropanolamide, 4% of oleic acid, 2% of Span 60, 3% of NP-4, 1% of fatty alcohol ether phosphate, 3% of bactericide (phenoxyethanol), 0.5% of defoamer (methyl silicone oil), and the balance is water; the antioxidant is tert-butylhydroquinone.

[0027] Comparative Example 2

[0028] This comparative example provides an aqueous emulsion, which is the same as Example 1 except that the antioxidant does not contain tert-butylhydroquinone, and specifically comprises the following raw materials in mass fraction: 35% of cycloalkyl base oil, 3% of rust inhibitor (sodium carbonate), 3% of antioxidant, 3% of N,N-dimethylformamide, 2% of tall oil diisopropanolamide, 4% of oleic acid, 2% of Span 60, 3% of NP-4, 1% of fatty alcohol ether phosphate, 3% of bactericide (phenoxyethanol), 0.5% of defoamer (methyl silicone oil), and the balance is water; the antioxidant is benzotriazole.

[0029] Comparative Example 3

[0030] The comparative example provides an aqueous emulsion, which is the same as Example 1 except that it does not contain oleic acid, and specifically comprises the following raw materials in mass fraction: 35% of cycloalkyl base oil, 3% of rust inhibitor (sodium carbonate), 3% of antioxidant, 3% of N,N-dimethylformamide, 2% of tall oil diisopropanolamide, 2% of Span 60, 3% of NP-4, 1% of fatty alcohol ether phosphate, 3% of bactericide (phenoxyethanol), 0.5% of defoamer (methyl silicone oil), and the balance is water; the antioxidant is composed of benzotriazole and tert-butylhydroquinone in a mass ratio of 1:2.5.

[0031] The aqueous emulsions in the above examples and comparative examples are prepared by the following method: (1) taking the water, emulsifier, and cycloalkyl base oil in proportion and stirring them evenly; (2) adding the remaining raw materials, stirring them evenly, and filtering to remove impurities and particles to obtain the aqueous emulsions.

[0032] The relevant properties of the aqueous emulsions in the above examples and comparative examples were tested according to the method in GB / T 6144-2010, and the results are filled in Table 1:

[0033] Table 1

[0034]

[0035] The above results show that the aqueous emulsion of the present invention has good corrosion resistance and rust resistance, and other properties meet the requirements of cutting fluid (specific data omitted).

[0036] After extensive research, the present invention prepares an antioxidant by mixing benzotriazole and tert-butylhydroquinone in a mass ratio of (1-3):(1-2), and then compounding the mixture with other suitable raw materials containing oleic acid, so as to effectively improve the antioxidant property of the aqueous emulsion, form a stable and long-lasting protective film on the metal surface, improve the corrosion resistance and rust prevention property of the aqueous emulsion, and keep the aqueous emulsion from deteriorating during long-term use, thereby extending the shelf life.

[0037] Compared with Example 1, Comparative Example 1 only uses tert-butylhydroquinone as an antioxidant; Comparative Example 2 only uses benzotriazole as an antioxidant; Comparative Example 3 uses both tert-butylhydroquinone and benzotriazole as antioxidants, but the formula does not contain oleic acid. From the results in Table 1, it can be seen that compared with Example 1, the corrosion resistance and rust prevention properties of the aqueous emulsions prepared in Comparative Examples 1 to 3 are reduced. This shows that the use of antioxidants composed of tert-butylhydroquinone and benzotriazole in the aqueous emulsion system containing oleic acid in the present invention can effectively improve the antioxidant effect of the aqueous emulsion, and enhance the corrosion resistance and rust prevention properties.

[0038] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An aqueous emulsion, characterized in that: The invention comprises the following raw materials in mass fractions: 20% to 40% of cycloalkyl base oil, 1% to 4% of rust inhibitor, 1% to 5% of antioxidant, 1% to 5% of N,N-dimethylformamide, 1% to 5% of tall oil diisopropanolamide, 1% to 5% of oleic acid, 1% to 5% of Span 60, 2% to 5% of NP-4, 0.5% to 1.5% of fatty alcohol ether phosphate, 1% to 5% of bactericide, 0.1% to 1% of defoamer, and the balance is water; the antioxidant is composed of benzotriazole and tert-butylhydroquinone in a mass ratio of (0.5 to 1):(1 to 3).

2. The aqueous emulsion according to claim 1, characterized in that The invention comprises the following raw materials in mass fraction: 25% to 35% of cycloalkyl base oil, 1% to 3% of rust inhibitor, 2% to 4% of antioxidant, 1% to 5% of N,N-dimethylformamide, 1% to 5% of tall oil diisopropanolamide, 2% to 4% of oleic acid, 1% to 5% of Span 60, 2% to 5% of NP-4, 0.5% to 1.5% of fatty alcohol ether phosphate, 1% to 5% of bactericide, 0.1% to 1% of defoamer, and the balance is water.

3. The aqueous emulsion according to claim 1 or 2, characterized in that The antioxidant is composed of benzotriazole and tert-butyl hydroquinone in a mass ratio of 1:(1-3).

4. The aqueous emulsion according to claim 3, characterized in that The antioxidant is composed of benzotriazole and tert-butyl hydroquinone in a mass ratio of 1:(2-3).

5. The aqueous emulsion according to claim 1, characterized in that The rust inhibitor is selected from at least one of sodium carbonate and triethanolamine.

6. The aqueous emulsion according to claim 1, characterized in that The bactericide is selected from at least one of 5-methyloxazoline, phenylisothiazolinone, iodopropynylbutylcarbamate, phenoxyethanol, and methylisothiazolinone.

7. The aqueous emulsion according to claim 1, characterized in that The defoaming agent is selected from at least one of methyl silicone oil and dimethyl silicone oil.

8. The method for preparing an aqueous emulsion according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: (1) taking the water, emulsifier and cycloalkyl base oil in proportion and stirring them evenly; (2) adding the remaining raw materials, stirring them evenly and filtering them to obtain the product.

9. Use of the aqueous emulsion according to any one of claims 1 to 7 in the fields of metal processing, textiles, leather, papermaking and coatings.

10. The use according to claim 9, characterized in that Said applications include use as a metal cutting fluid.

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