Strong heat conduction type water-based semi-synthetic cutting fluid and preparation method thereof

Abstract

The invention provides a water-based semi-synthetic cutting fluid, which is prepared from the following raw materials in percentage by mass: 20 to 35 percent of naphthenic base oil, 1 to 3 percent of Tween-80, 1 to 3 percent of polyethylene glycol, 1 to 5 percent of Span60, 1 to 5 percent of oleic acid, 5 to 15 percent of polyether F-6, 0.5 to 1.5 percent of sodium sulfonate, 1 to 5 percent of bactericide, 1 to 5 percent of glycerol, 0.1 to 1 percent of defoaming agent, 0.5 to 2 percent of corrosion inhibitor, 8 to 12 percent of antirust agent and the balance of water. According to the water-based semi-synthetic cutting fluid, proper raw materials are compounded through optimization, and particularly, a proper amount of polyether F-6, polyethylene glycol and glycerol are added on the basis of a formula, so that the water-based semi-synthetic cutting fluid has good lubricating performance and cooling performance, and is more suitable for processing of metal devices.

Description

Technical Field

[0001] The present invention belongs to the technical field of cutting fluids, especially metal cutting fluids, and particularly relates to a strongly heat-conductive water-based semi-synthetic cutting fluid and a preparation method thereof. Background Art

[0002] Cutting fluid (cutting fluid, coolant) is an industrial liquid used in metal cutting and grinding processes to cool and lubricate tools and workpieces. Cutting fluid is composed of a variety of super-functional additives through scientific compounding, and simultaneously has good cooling performance, lubricating performance, rust prevention performance, oil removal and cleaning function, and anti-corrosion function.

[0003] The development of tool materials has promoted the development of cutting fluids. In 1927, Germany first developed cemented carbide, and the cutting speed was 2-5 times higher than that of high-speed steel. With the continuous increase of cutting temperature, the cooling performance of oil-based cutting fluids can no longer fully meet the cutting requirements, and then people began to re-attach importance to the advantages of water-based cutting fluids. Water-based cutting fluids can be divided into emulsions, semi-synthetic cutting fluids and fully synthetic cutting fluids. The classification of emulsions, semi-synthetics and fully synthetics usually depends on the type of base oil in the product: Emulsion is a water-soluble cutting fluid with only mineral oil as the base oil; Semi-synthetic cutting fluid is a water-soluble cutting fluid containing both mineral oil and chemically synthesized base oil; Fully synthetic cutting fluid is a water-soluble cutting fluid that only uses chemically synthesized base oil (i.e., does not contain mineral oil). Water-based semi-synthetic cutting fluid is a metal processing fluid that combines the advantages of oil-based cutting fluids and water-soluble cutting fluids. It mainly consists of additives such as base oil, surfactant, rust inhibitor, extreme pressure agent, preservative, etc. and water. Compared with oil-based cutting fluids, water-based cutting fluids have relatively poor lubricating performance. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide a strongly heat-conductive water-based semi-synthetic cutting fluid, which has both good cooling performance and lubricating performance.

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

[0006] The first aspect of the present invention provides a water-based semi-synthetic cutting fluid, comprising raw materials in the following mass fractions: naphthenic base oil 20% - 35%, Tween-80 1% - 3%, polyethylene glycol 1% - 3%, Span60 1% - 5%, oleic acid 1% - 5%, polyether F-6 5% - 15%, sodium sulfonate 0.5% - 1.5%, fungicide 1% - 5%, glycerol 1% - 5%, defoamer 0.1% - 1%, corrosion inhibitor 0.5% - 2%, rust inhibitor 8% - 12%, and the balance is water.

[0007] In some embodiments, the water-based semi-synthetic cutting fluid comprises raw materials in the following mass fractions: naphthenic base oil 25% - 30%, Tween-80 1% - 2%, polyethylene glycol 1% - 2%, Span60 1% - 3%, oleic acid 2% - 4%, polyether F-6 5% - 10%, sodium sulfonate 0.5% - 1%, bactericide 1% - 3%, glycerol 2% - 4%, defoamer 0.3% - 0.7%, corrosion inhibitor 0.5% - 1.5%, rust inhibitor 9% - 11%, and the balance is water.

[0008] In some preferred embodiments, the water-based semi-synthetic cutting fluid comprises raw materials in the following mass fractions: naphthenic base oil 27%, Tween-80 1.5%, polyethylene glycol 1.5%, Span60 2%, oleic acid 3%, polyether F-6 10%, sodium sulfonate 1%, bactericide 2%, glycerol 3%, defoamer 0.5%, corrosion inhibitor 1%, rust inhibitor 10%, and the balance is water.

[0009] In some embodiments, the bactericide is selected from at least one of 1,2-benzisothiazol-3-one, hexahydro-1,3,5-tris(2-hydroxyethyl)-s-triazine, butyl iodopropargylcarbamate, and phenoxyethanol.

[0010] In some embodiments, the defoamer is selected from at least one of diethylhexanol, isooctanol, isoamyl alcohol, diisobutyl carbinol, and methyl silicone oil.

[0011] In some embodiments, the corrosion inhibitor is selected from at least one of phenolic ether phosphate, fatty alcohol ether phosphate, potassium salt of isotridecanol ether phosphate, lauryl phosphate, and isotridecanol ether phosphate.

[0012] In some embodiments, the rust inhibitor is at least one of sodium carbonate and triethanolamine.

[0013] The second aspect of the present invention provides a preparation method of the water-based semi-synthetic cutting fluid as described above, comprising the following steps: first, mix the base oil with part of the water and stir evenly; add polyethylene glycol and continuously stir until emulsified evenly; then add the remaining raw materials in sequence while stirring until completely dissolved, thus obtaining the product.

[0014] The third aspect of the present invention provides the application of the water-based semi-synthetic cutting fluid as described above in metal processing.

[0015] The present invention has the following beneficial effects.

[0016] Through optimization, the present invention combines appropriate raw materials. Especially, by adding appropriate amounts of polyether F-6, polyethylene glycol, and glycerol on the basis of the formula, the water-based semi-synthetic cutting fluid of the present invention has both excellent lubricating performance and cooling performance, and is more suitable for the processing of metal devices.

[0017] The water-based semi-synthetic cutting fluid of the present invention is applicable to the cutting processes of various metal materials (such as steel, cast iron, copper, aluminum, etc.), including turning, milling, drilling, grinding and other processes. When in use, the water-based semi-synthetic cutting fluid of the present invention is added to the circulation system of the cutting machine tool, and the cutting fluid is recycled by pumping. Specific Embodiments

[0018] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the embodiments. The following are the preferred embodiments of the present invention. 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 without specific conditions noted in the following embodiments are generally carried out under conventional conditions or according to the conditions recommended by the manufacturers. All kinds of common reagents used in the embodiments are commercially available products.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. 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 of the related listed items.

[0020] The following will be described in conjunction with specific embodiments.

[0021] Embodiment 1

[0022] This embodiment provides a water-based semi-synthetic cutting fluid, which includes the following raw materials by mass fraction: naphthenic base oil 27%, Tween-80 1.5%, polyethylene glycol 1.5%, Span60 2%, oleic acid 3%, polyether F-6 10%, sodium sulfonate 1%, 1,2-benzisothiazol-3-one 2%, glycerol 3%, methyl silicone oil 0.5%, lauryl phosphate 1%, triethanolamine 10%, and the balance is water.

[0023] Embodiment 2

[0024] This embodiment provides a water-based semi-synthetic cutting fluid, which includes the following raw materials by mass fraction: naphthenic base oil 25%, Tween-80 2%, polyethylene glycol 1%, Span60 3%, oleic acid 4%, polyether F-6 10%, sodium sulfonate 0.5%, 1,2-benzisothiazol-3-one 3%, glycerol 2%, methyl silicone oil 0.7%, lauryl phosphate 0.5%, triethanolamine 11%, and the balance is water.

[0025] Embodiment 3

[0026] This embodiment provides an aqueous semi-synthetic cutting fluid, which comprises raw materials with the following mass fractions: naphthenic base oil 30%, Tween-80 1%, polyethylene glycol 2%, Span60 1%, oleic acid 2%, polyether F-6 5%, sodium sulfonate 1%, 1,2-benzisothiazol-3-one 1%, glycerol 4%, methyl silicone oil 0.5%, lauryl phosphate 15%, triethanolamine 10%, and the balance is water.

[0027] Example 4

[0028] This embodiment provides an aqueous semi-synthetic cutting fluid, which comprises raw materials with the following mass fractions: naphthenic base oil 30%, Tween-80 2%, polyethylene glycol 2%, Span60 3%, oleic acid 4%, polyether F-6 12%, sodium sulfonate 1.5%, 1,2-benzisothiazol-3-one 3%, glycerol 4%, methyl silicone oil 0.8%, lauryl phosphate 1.5%, triethanolamine 12%, and the balance is water.

[0029] Example 5

[0030] This embodiment provides an aqueous semi-synthetic cutting fluid, which comprises raw materials with the following mass fractions: naphthenic base oil 25%, Tween-80 3%, polyethylene glycol 1.5%, Span60 2.5%, oleic acid 3%, polyether F-6 12%, sodium sulfonate 1.5%, 1,2-benzisothiazol-3-one 3.5%, glycerol 3%, methyl silicone oil 0.5%, lauryl phosphate 1.5%, triethanolamine 10%, and the balance is water.

[0031] Comparative Example 1

[0032] This comparative example provides an aqueous semi-synthetic cutting fluid, which is the same as Example 1 except that an equal amount of glycerol is used to replace polyethylene glycol. Specifically, it comprises raw materials with the following mass fractions: naphthenic base oil 27%, Tween-80 1.5%, Span60 2%, oleic acid 3%, polyether F-6 10%, sodium sulfonate 1%, 1,2-benzisothiazol-3-one 2%, glycerol 4.5%, methyl silicone oil 0.5%, lauryl phosphate 1%, triethanolamine 10%, and the balance is water.

[0033] Comparative Example 2

[0034] This comparative example provides an aqueous semi-synthetic cutting fluid, which is the same as Example 1 except that an equal amount of polyether F-6 is used to replace glycerol. Specifically, it comprises raw materials with the following mass fractions: naphthenic base oil 27%, Tween-80 1.5%, polyethylene glycol 1.5%, Span60 2%, oleic acid 3%, polyether F-6 13%, sodium sulfonate 1%, 1,2-benzisothiazol-3-one 2%, methyl silicone oil 0.5%, lauryl phosphate 1%, triethanolamine 10%, and the balance is water.

[0035] The water-based semi-synthetic cutting fluids of the above examples and comparative examples were prepared by the following method: First, mix the base oil with part of the water and stir evenly; add polyethylene glycol and continue stirring until emulsified evenly; then add the remaining raw materials in sequence while stirring, until completely dissolved, thus obtaining the product.

[0036] Test the cold cutting performance and lubricating performance of the water-based semi-synthetic cutting fluids prepared in the above examples and comparative examples (in accordance with the standard of GB / T 6144-2010).

[0037] Fill the results in Table 1.

[0038] Table 1

[0039]

[0040] The above results show that the cutting fluid of the present invention has both excellent cooling performance and lubricating performance. Through optimization, the present invention combines appropriate raw materials, especially by adding appropriate amounts of polyether F-6, polyethylene glycol and glycerol simultaneously on the basis of the formula, which can make the water-based semi-synthetic cutting fluid of the present invention have good lubricating performance and cooling performance, and is more suitable for the processing of metal devices.

[0041] Compared with Example 1, in Comparative Example 1, polyethylene glycol was replaced with an equal amount of glycerol, and in Comparative Example 2, glycerol was replaced with an equal amount of polyether F-6, both of which led to a decrease in the cooling performance and lubricating performance of the prepared cutting fluid. It shows that the simultaneous use of polyether F-6, polyethylene glycol and glycerol and other raw materials of the present invention in combination can better improve the cooling performance and lubricating performance of the cutting fluid.

[0042] The technical features of the above-mentioned examples can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above examples are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0043] The above-mentioned examples only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A water-based semi-synthetic cutting fluid, characterized in that: The invention comprises the following raw materials in mass fractions: 20% to 35% of cycloalkane base oil, 1% to 3% of Tween-80, 1% to 3% of polyethylene glycol, 1% to 3% of Span60, 1% to 5% of oleic acid, 5% to 15% of polyether F-6, 0.5% to 1.5% of sodium sulfonate, 1% to 5% of bactericide, 1% to 5% of glycerol, 0.1% to 1% of defoamer, 0.5% to 2% of corrosion inhibitor, 8% to 12% of rust inhibitor, and the balance is water.

2. The aqueous semi-synthetic cutting fluid according to claim 1, characterized in that: The invention comprises the following raw materials in mass fractions: 25% to 30% of cycloalkane base oil, 1% to 2% of Tween-80, 1% to 2% of polyethylene glycol, 1% to 2% of Span60, 2% to 4% of oleic acid, 5% to 10% of polyether F-6, 0.5% to 1% of sodium sulfonate, 1% to 3% of bactericide, 2% to 4% of glycerol, 0.3% to 0.7% of defoamer, 0.5% to 1.5% of corrosion inhibitor, 9% to 11% of rust inhibitor, and the balance is water.

3. The aqueous semi-synthetic cutting fluid according to claim 2, characterized in that: The invention comprises the following raw materials in mass fractions: 27% of cycloalkane base oil, 1.5% of Tween-80, 1.5% of polyethylene glycol, 2% of Span60, 3% of oleic acid, 10% of polyether F-6, 1% of sodium sulfonate, 2% of bactericide, 3% of glycerol, 0.5% of defoamer, 1% of corrosion inhibitor, 10% of rust inhibitor, and the balance is water.

4. The aqueous semi-synthetic cutting fluid according to any one of claims 1 to 3, characterized in that: The bactericide is selected from at least one of 1,2-benzisothiazol-3-one, hexahydro-1,3,5-tris(2-hydroxyethyl)-S-triazine, iodopropynyl butyl carbamate and phenoxyethanol.

5. The aqueous semi-synthetic cutting fluid according to any one of claims 1 to 3, characterized in that: The defoaming agent is selected from at least one of diethylhexanol, isooctyl alcohol, isopentanol, diisobutyl carbinol and methyl silicone oil.

6. The aqueous semi-synthetic cutting fluid according to any one of claims 1 to 3, characterized in that: The corrosion inhibitor is selected from at least one of phenol ether phosphate, fatty alcohol ether phosphate, isotridecanol ether phosphate potassium salt, lauryl phosphate and isotridecanol ether phosphate.

7. The aqueous semi-synthetic cutting fluid according to any one of claims 1 to 3, characterized in that: The rust inhibitor is at least one of sodium carbonate and triethanolamine.

8. The method for preparing an aqueous semi-synthetic cutting fluid according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: firstly mixing the base oil with part of the water and stirring evenly; adding polyethylene glycol and continuously stirring until the emulsification is evenly achieved; and adding the remaining raw materials in sequence while stirring until the raw materials are completely dissolved.

9. Use of the aqueous semi-synthetic cutting fluid according to any one of claims 1 to 7 in metal processing.

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