CN107674745B

CN107674745B - Diamond wire lubricating cooling liquid and application

Info

Publication number: CN107674745B
Application number: CN201710969309.5A
Authority: CN
Inventors: 杨丽燕; 吴平章
Original assignee: Shanghai Yu Xin Mstar Technology Ltd
Current assignee: Shanghai Yu Xin Mstar Technology Ltd
Priority date: 2017-10-18
Filing date: 2017-10-18
Publication date: 2020-08-28
Anticipated expiration: 2037-10-18
Also published as: CN107674745A

Abstract

The diamond wire lubricating cooling liquid comprises the following preparation raw materials in parts by weight: 10-50 parts of ethylene glycol, 1-5 parts of preservative, 1-3 parts of defoaming agent, 1-3 parts of extreme pressure agent, 1-10 parts of antirust agent, 10-20 parts of wetting agent, 6-10 parts of emulsifier, 10-20 parts of dispersant and 20-50 parts of deionized water.

Description

Diamond wire lubricating cooling liquid and application

Technical Field

The invention relates to the photovoltaic industry, in particular to a diamond wire lubricating cooling liquid and application thereof.

Background

The photovoltaic is a novel power generation system which directly converts solar radiation energy into electric energy by utilizing the photovoltaic effect of a solar cell semiconductor material, and has two modes of independent operation and grid-connected operation. The most common solar energy utilization method is to generate electricity by solar cells, and more than 80% of the solar cells require silicon wafers. The processing quality and precision of the silicon wafer have an important influence on the performance and power generation efficiency of the battery. With the rapid development of the solar energy and integrated circuit industry, the processing efficiency and quality of silicon wafers must be improved through the progress of manufacturing technology, so as to reduce the cost and improve the conversion efficiency.

The diamond wire cutting technology is also called as fixed abrasive cutting technology, and the diamond abrasive is attached to the surface of a steel wire by using an electroplating or resin bonding method, and the diamond wire is directly acted on the surface of a silicon rod or a silicon ingot to generate grinding, so that the cutting effect is achieved. The diamond wire cutting has the characteristics of high cutting speed, high cutting precision, low material loss and the like. Because the diamond wire cutting speed is high, more heat generated on the surfaces of a wire saw and a silicon rod needs to be dissipated in time to avoid influencing the quality of a silicon wafer, and therefore cooling liquid is used in the diamond wire cutting technology. In diamond wire cutting technology, the abrasive particles are not suspended in the cutting fluid, but embedded on the steel wire, which means that a cutting fluid with a lower viscosity can be used, resulting in a faster cutting speed. However, the surface of the diamond wire and the silicon rod generates more heat, so that a cooling liquid with better cooling performance than the traditional cutting liquid is needed for cooling.

Disclosure of Invention

In order to solve the problems in the prior art, the first aspect of the invention provides a diamond wire lubricating cooling liquid, which comprises the following preparation raw materials in parts by weight: 10-50 parts of ethylene glycol, 1-5 parts of preservative, 1-3 parts of defoaming agent, 1-3 parts of extreme pressure agent, 1-10 parts of antirust agent, 10-20 parts of wetting agent, 6-10 parts of emulsifier, 10-20 parts of dispersant and 20-50 parts of deionized water.

In some embodiments, the preservative is selected from at least one of benzoic acid or a salt thereof, sorbic acid or a salt thereof.

In some embodiments, the defoamer is selected from at least one of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether, polydimethylsiloxane.

In some embodiments, the extreme pressure agent is selected from borax and/or sodium silicate.

In some embodiments, the rust inhibitor is selected from at least one of triethanolamine borate, triethanolamine, sodium molybdate, barium petroleum sulfonate.

In some embodiments, the wetting agent is selected from at least one of alkyl alcohol polyoxyethylene ether, alkyl alcohol polyoxyethylene polyoxypropylene ether, alkylamine polyoxyethylene ether, alkyl ester of alkyl acid.

In some embodiments, the emulsifier is selected from at least one of a nonionic surfactant or an anionic surfactant.

In some embodiments, the emulsifier is selected from a mixture of a nonionic surfactant and an anionic surfactant.

The second aspect of the invention provides a preparation method of the diamond wire lubricating coolant, which comprises the following steps: adding an emulsifier, an extreme pressure agent, an antirust agent, a preservative and a wetting agent into deionized water, and uniformly stirring; adding ethylene glycol, dispersant and defoamer, and stirring for 5h to obtain the product.

The third aspect of the invention provides an application of the diamond wire lubricating and cooling liquid in the processing of monocrystalline silicon, polycrystalline silicon, silicon wafers, quartz, indium gallium nitride, gallium arsenide and germanium.

The diamond wire lubricating cooling liquid provided by the invention has the advantages of good wetting, no residue, low foam, recoverability, no pollution, no harm, rust prevention, cooling and cleaning, and can meet the requirements of production and processing of monocrystalline silicon, polycrystalline silicon, silicon wafers, quartz, indium gallium nitride, gallium arsenide and germanium.

Detailed Description

The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.

The term "prepared from …" as used herein is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

The conjunction "consisting of …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.

When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.

The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.

Approximating language, as used herein throughout the specification and claims, is intended to modify a quantity, such that the invention is not limited to the specific quantity, but includes portions that are literally received for modification without substantial change in the basic function to which the invention is related. Accordingly, the use of "about" to modify a numerical value means that the invention is not limited to the precise value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.

In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.

Polysilicon, as a hard and brittle material, has the properties of high hardness, high brittleness, high wear resistance, high corrosion resistance, high oxidation resistance, high resistivity, high temperature resistance, non-permeability and the like. Therefore, polysilicon has high hardness and high directionality, and is generally less likely to undergo plastic deformation. During the processing, the polysilicon crystal does not exhibit ductility, so the polysilicon crystal does not generate dislocation and slip under the action of external force. However, since the tensile stress is much greater than the shear stress, the polysilicon wafer is broken when the polysilicon crystal is subjected to a large shear stress during the processing. Meanwhile, the polycrystalline silicon crystal is used as a hard and brittle material, and after cutting is finished, a mechanical damage layer is generated on the surface of the polycrystalline silicon crystal due to the action of mechanical processing, so that quite high requirements are put forward on the preparation process of the polycrystalline silicon slice.

The invention provides a diamond wire lubricating cooling liquid which comprises the following preparation raw materials in parts by weight: 10-50 parts of ethylene glycol, 1-5 parts of preservative, 1-3 parts of defoaming agent, 1-3 parts of extreme pressure agent, 1-10 parts of antirust agent, 10-20 parts of wetting agent, 6-10 parts of emulsifier, 10-20 parts of dispersant and 20-50 parts of deionized water.

The diamond wire cooling liquid can be continuously degraded in processing and use, and phenomena that the working liquid smells, changes from milk white to grey brown, changes from transparent to clear to turbid and the like can occur. Microbial spoilage is one of the causes of this phenomenon. The cooling liquid contains water and organic matters, so that the cooling liquid can be used as a nutrient source and is more suitable for the growth of microorganisms. And some moulds can be bred by self-nourishment, especially under the condition of containing inorganic substances, fatty acid and soap thereof and at the temperature of 25-35 ℃. Bacteria can degrade some substances, and the generated products are corrosive to metals, and have reduced antirust property and emulsifying capacity of the emulsifying agent.

Specific examples of preservatives include, but are not limited to, benzoic acid, sodium benzoate, potassium benzoate, ammonium benzoate, sorbic acid, sodium sorbate, potassium sorbate, ammonium sorbate.

In the diamond wire cooling liquid, a large amount of surfactant is contained, some of the surfactant can promote foam generation, and the diamond wire can clamp air during the use process to provide a condition for generating bubbles. Foam in the liquid can cause the liquid supply to be discontinuous, thereby reducing cooling and lubricity, and enlarging the contact area with air to cause decay of the liquid.

For processing equipment, the surface of the processing equipment is a fresh surface of a material, is not protected at all, and is extremely easy to damage by environmental attack. Oxygen and moisture in the air can cause the metal on the surface to generate oxide or cause corrosion, and substances in the diamond wire cooling liquid and equipment can also generate loose substances, so that the antirust performance is also highly required.

In the cutting process of the diamond wire, friction and abrasion occur between the diamond wire and silicon, the friction condition is fluid lubrication and boundary lubrication, mixed lubrication between the fluid lubrication and the boundary lubrication is also adopted, and elastic fluid lubrication is also adopted, so that the requirement on the lubricating performance is high. In the cutting, it is necessary that the wetting agent does not reach the rubbing area in time before the wetting agent reaches.

Specific examples of the alkyl alcohol polyoxyethylene ether include, but are not limited to, octyl alcohol polyoxyethylene ether, nonyl alcohol polyoxyethylene ether, decyl alcohol polyoxyethylene ether, undecyl alcohol polyoxyethylene ether, lauryl alcohol polyoxyethylene ether, tridecyl alcohol polyoxyethylene ether, myristyl alcohol polyoxyethylene ether, pentadecyl alcohol polyoxyethylene ether, palmityl alcohol polyoxyethylene ether, heptadecyl alcohol polyoxyethylene ether, and stearyl alcohol polyoxyethylene ether.

Specific examples of the alkyl alcohol polyoxyethylene polyoxypropylene ether include, but are not limited to, octyl alcohol polyoxyethylene polyoxypropylene ether, nonyl alcohol polyoxyethylene polyoxypropylene ether, decyl alcohol polyoxyethylene polyoxypropylene ether, undecyl alcohol polyoxyethylene polyoxypropylene ether, lauryl alcohol polyoxyethylene polyoxypropylene ether, tridecyl alcohol polyoxyethylene polyoxypropylene ether, myristyl alcohol polyoxyethylene polyoxypropylene ether, pentadecyl alcohol polyoxyethylene polyoxypropylene ether, palmityl alcohol polyoxyethylene polyoxypropylene ether, heptadecyl alcohol polyoxyethylene polyoxypropylene ether, and stearyl alcohol polyoxyethylene polyoxypropylene ether.

Specific examples of the alkylamine polyoxyethylene ether include, but are not limited to, octylamine polyoxyethylene polyoxypropylene ether, nonylamine polyoxyethylene polyoxypropylene ether, decylamine polyoxyethylene polyoxypropylene ether, undecylamine polyoxyethylene polyoxypropylene ether, laurylamine polyoxyethylene polyoxypropylene ether, tridecylamine polyoxyethylene polyoxypropylene ether, myristylamine polyoxyethylene polyoxypropylene ether, pentadecylamine polyoxyethylene polyoxypropylene ether, palmitylamine polyoxyethylene polyoxypropylene ether, heptadecylamine polyoxyethylene polyoxypropylene ether, and stearylamine polyoxyethylene polyoxypropylene ether.

Specific examples of alkyl alkanoates include, but are not limited to, dioctyl glutarate, didecyl glutarate, diisodecyl glutarate, dibutoxyethyl glutarate, di-n-butyl adipate, diisobutyl adipate, di-n-hexyl adipate, dioctyl adipate, diisooctyl adipate, dinonyl adipate, diisononyl adipate, diisodecyl adipate, diisobutyl azelate, di-n-hexyl azelate, di-2-ethylbutyl azelate, di-2-ethylhexyl azelate, diisooctyl azelate, dimethyl sebacate, di-n-butyl sebacate, diisopropyl sebacate, dioctyl sebacate, diisooctyl sebacate, di-sec-octyl sebacate, dinonyl sebacate.

In some embodiments, the dispersant is a mixture of dithioacetamide and a silicone polyether emulsion.

In the research, the inventor finds that the weight ratio of the dithioacetamide to the silicone polyether emulsion is 2: 1, not only can have better dispersion effect to the silicon chip in the cutting, can also slow down the friction, improve the cooling effect. The inventor thinks that the silicon resin polyether emulsion in the diamond wire lubricating cooling liquid provided by the invention can adjust the arrangement sequence in molecules, amino in dithioacetamide is a hydrophilic part, sulfur is a hydrophobic part, and the atomic radius of sulfur is larger, so that the dithioacetamide can have a certain interaction with the diamond wire, and under the adjustment of the silicon resin polyether emulsion, the dithioacetamide can form a better lubricating layer between a silicon wafer and the diamond wire, so that the frictional heat is reduced, and the cooling effect is improved. The cooling effect is improved while the silicon chips are well dispersed.

The nonionic surfactant does not undergo dissociation when dissolved in water, and its lipophilic group in the molecule is substantially the same as that of the ionic surfactant, and its hydrophilic group is mainly composed of a group having a certain number of oxygen-containing groups (such as hydroxyl group and polyoxyethylene chain).

The nonionic surfactant is not in an ionic state in the solution, so that the nonionic surfactant has high stability, is not easily influenced by acid and alkali, can be mixed with other types of surfactants for use, has good compatibility, has good solubility in various solvents, and does not strongly adsorb on the solid surface.

Nonionic surfactants are mostly in liquid and slurry states, and their solubility in water decreases with increasing temperature. The nonionic surfactant has various good performances of washing, dispersing, emulsifying, foaming, wetting, solubilizing, antistatic, level dyeing, corrosion prevention, sterilization, protective colloid and the like, and is widely applied to the aspects of textile, paper making, food, plastic, leather, fur, glass, petroleum, chemical fiber, medicine, pesticide, coating, dye, fertilizer, film, photography, metal processing, mineral separation, building materials, environmental protection, cosmetics, fire protection, agriculture and the like.

In some embodiments, the nonionic surfactant is selected from at least one of a long chain fatty alcohol polyoxyethylene ether surfactant, an alkylphenol polyoxyethylene ether surfactant, a fatty acid polyoxyethylene ether surfactant, a polyoxyethylene alkylamine surfactant, a polyoxyethylene alkylolamide surfactant, a glycerin fatty acid ester surfactant, a pentaerythritol fatty acid ester surfactant, a sorbitol fatty acid ester surfactant, a sorbitan fatty acid ester surfactant, a sucrose fatty acid ester surfactant, an alkylolamide surfactant.

Long-chain fatty alcohol-polyoxyethylene ether. The long-chain fatty alcohol polyoxyethylene ether is prepared by the addition reaction of long-chain fatty alcohol and ethylene oxide. The surfactant has high stability, good biodegradability and water solubility, and good wetting property. The long chain fatty alcohols from which such products are made are coconut oil reducing alcohol, lauryl alcohol, cetyl alcohol, oleyl alcohol and cetyl alcohol.

Alkylphenol ethoxylates. The phenol used for synthesizing alkylphenol ethoxylates can be phenol, cresol, naphthol, etc. Although chemically very different from fatty alcohols, the properties of alkylphenols are similar. When the non-ionic surfactant is synthesized by selecting nonyl phenol, a product added with four-molecular ethylene oxide cannot be dissolved in water; the products of the addition reaction with six and seven molecules of ethylene oxide can be completely dissolved in water at room temperature; the product added with eight to twelve molecules of ethylene oxide has good wetting, penetrating and washing capabilities and better emulsifying capability, so the product has wide application and can be used as a detergent and a penetrating agent; the products of ethylene oxide addition with more than fifteen molecules have no penetration and washing ability and can be used as special emulsifying and dispersing agents.

The alkylphenol ethoxylates has high chemical stability and is not easily broken by strong acid and strong base even at high temperature, so that they can also be used in metal pickling solution and strong base detergent. Alkylphenol ethoxylates is more difficult to biodegrade than fatty alcohol ethoxylates.

Polyoxyethylene esters of fatty acids. In the presence of a catalyst, fatty acid and ethylene oxide are subjected to addition reaction to generate fatty acid polyoxyethylene ester. Another preparation method is to carry out esterification reaction on fatty acid and polyethylene glycol. Compared with fatty alcohol-polyoxyethylene ether and alkylphenol ethoxylates, the surfactant has poorer penetration and washing capabilities, and is mainly used as an emulsifier, a dispersing agent, a fiber oil agent, a dyeing assistant and the like. The product is susceptible to hydrolysis by acid and alkali solutions to form the primary fatty acid and polyethylene glycol, so that the washing ability in strong acid solutions is lost.

Polyoxyethylene alkyl amines. The addition reaction of ethylene oxide and alkylamine can produce 2 reaction products. Such nonionic surfactants, like other nonionic surfactants, are insoluble in water and soluble in oil when the number of oxyethylene groups is small, but are soluble in an acidic aqueous solution because of the structure of organic amines. Therefore, the polyoxyethylene alkylamine has the characteristics of both nonionic and cationic surfactants, such as acid resistance, alkali resistance and bactericidal performance. When the number of oxyethylene is large, the nonionic property thereof is increased and the activity is not precipitated in an alkaline solution, that is, the activity is excellent also in an alkaline solution. The cationic property is relatively decreased due to the increase of the nonionic property, and compatibility with the anionic surfactant is exhibited. These surfactants, due to their non-ionic and cationic nature, are commonly used as dyeing aids, also in rayon production to increase the strength of regenerated fiber filaments, and to maintain the nozzle pattern and prevent fouling.

Polyoxyethylene alkylolamides. The reaction of ethylene oxide with alkanolamide produces polyoxyethylene alkylolamide. The nonionic surfactants have strong foaming and foam stabilizing effects, so the nonionic surfactants are commonly used as foam promoters and foam stabilizers, and some of the nonionic surfactants have good washing capacity and solubilizing and thickening effects.

In some embodiments, the anionic surfactant is selected from at least one of a fatty acid salt surfactant, an alkylbenzene sulfonate surfactant, an alkyl sulfonate surfactant, a petroleum sulfonate surfactant, a sulfate salt surfactant, a phosphate salt surfactant.

The anionic surfactant is selected from higher fatty acid salt, sulfonate, sulfate ester salt, and fatty acyl-peptide condensate. The higher fatty acid salt has a chemical formula of RCOOM, wherein R is a hydrocarbon group with a carbon number of 8-22, and M is Na, K, generally Na. The soap is prepared by heating natural animal and vegetable oil and alkali water solution for saponification reaction. The alkali used for saponification can be sodium hydroxide or potassium hydroxide. The chemical formula of the sulfonate is R-SO₃Na, the number of carbon atoms in the carbon chain is between 8 and 20. The surfactant is easy to dissolve in water and has good foaming effect. The sulfonate does not hydrolyze in acidic solution. The alkylbenzene sulfonate does not form precipitate with calcium and magnesium ions in hard water and is acid-resistant anda base. The starting materials for the manufacture of alkylbenzene sulfonates are mainly obtained from the petroleum industry.

Petroleum sulfonates are mixtures of various sulfonates, the major component being complex alkylbenzenesulfonates and alkylnaphthalenesulfonates, and the second being sulfonates of aliphatic hydrocarbons and sulfonates of cyclic hydrocarbons and their oxides.

The chemical formula of the sulfate salt is ROSO₃M and M are Na, K and N (CH)₂CH₂OH)₃The number of carbons in the hydrocarbon group is 8 to 18.

The aliphatic sulfate ester salt is prepared by sulfating fatty alcohol, fatty alcohol ether or fatty acid monoglyceride and then neutralizing with alkali. Sodium dodecyl sulfate, also known as sodium dodecyl sulfate, is a major representative of this class of surfactants, and is a white powder that has a characteristic odor and is readily soluble in water.

The fatty acyl-peptide condensate has the chemical general formula R₁CONHR₂COOH，R₁Has 8 to 18 carbon atoms, R₂The aliphatic group is amino group, is formed by condensation polymerization of fatty acid chloride and protein hydrolysate, is stable under weak acid, and has good washing ability. The typical substance is sodium lauroyl sarcosinate, which is prepared by condensing acyl chloride of lauric acid and sodium sarcosinate.

In some embodiments, the emulsifier is a mixture of polyoxyethylene alkylolamide 6501 and sodium petroleum sulfonate, the weight ratio of polyoxyethylene alkylolamide 6501 to sodium petroleum sulfonate is 3: 1.

The invention is further illustrated by the following specific examples.

Example 1

The diamond wire lubricating cooling liquid comprises the following preparation raw materials in parts by weight: 30 parts of ethylene glycol, 1 part of sodium benzoate, 2 parts of sodium sorbate, 3 parts of polydimethylsiloxane, 2 parts of sodium silicate, 1 part of triethanolamine, 3 parts of triethanolamine borate, 8 parts of diisooctyl sebacate, 6 parts of dioctyl sebacate, 65014 parts of oxyethylene alkylolamide, 4 parts of petroleum sodium sulfonate, 10 parts of dithioacetamide, 5 parts of silicone resin polyether emulsion and 40 parts of deionized water.

Example 2

The diamond wire lubricating cooling liquid comprises the following preparation raw materials in parts by weight: 30 parts of ethylene glycol, 1 part of sodium benzoate, 2 parts of sodium sorbate, 3 parts of polydimethylsiloxane, 2 parts of sodium silicate, 1 part of triethanolamine, 3 parts of triethanolamine borate, 8 parts of diisooctyl sebacate, 6 parts of dioctyl sebacate, 65012 parts of oxyethylene alkylolamide, 6 parts of petroleum sodium sulfonate, 10 parts of dithioacetamide, 5 parts of silicone resin polyether emulsion and 40 parts of deionized water.

Example 3

The diamond wire lubricating cooling liquid comprises the following preparation raw materials in parts by weight: 30 parts of ethylene glycol, 1 part of sodium benzoate, 2 parts of sodium sorbate, 3 parts of polydimethylsiloxane, 2 parts of sodium silicate, 1 part of triethanolamine, 3 parts of triethanolamine borate, 8 parts of diisooctyl sebacate, 6 parts of dioctyl sebacate, 65016 parts of oxyethylene alkylolamide, 2 parts of petroleum sodium sulfonate, 10 parts of dithioacetamide, 5 parts of silicone resin polyether emulsion and 40 parts of deionized water.

Example 4

The diamond wire lubricating cooling liquid comprises the following preparation raw materials in parts by weight: 30 parts of ethylene glycol, 1 part of sodium benzoate, 2 parts of sodium sorbate, 3 parts of polydimethylsiloxane, 2 parts of sodium silicate, 1 part of triethanolamine, 3 parts of triethanolamine borate, 8 parts of diisooctyl sebacate, 6 parts of dioctyl sebacate, 65014 parts of oxyethylene alkylolamide, 4 parts of petroleum sodium sulfonate, 5 parts of dithioacetamide, 10 parts of silicone resin polyether emulsion and 40 parts of deionized water.

Example 5

The diamond wire lubricating cooling liquid comprises the following preparation raw materials in parts by weight: 30 parts of ethylene glycol, 1 part of sodium benzoate, 2 parts of sodium sorbate, 3 parts of polydimethylsiloxane, 2 parts of sodium silicate, 1 part of triethanolamine, 3 parts of triethanolamine borate, 8 parts of diisooctyl sebacate, 6 parts of dioctyl sebacate, 65014 parts of oxyethylene alkylolamide, 4 parts of petroleum sodium sulfonate, 12 parts of dithioacetamide, 3 parts of silicone resin polyether emulsion and 40 parts of deionized water.

Example 6

The diamond wire lubricating cooling liquid comprises the following preparation raw materials in parts by weight: 30 parts of ethylene glycol, 1 part of sodium benzoate, 2 parts of sodium sorbate, 3 parts of polydimethylsiloxane, 2 parts of sodium silicate, 1 part of triethanolamine, 3 parts of triethanolamine borate, 8 parts of diisooctyl sebacate, 6 parts of dioctyl sebacate, 65018 parts of oxyethylene alkylolamide, 10 parts of dithioacetamide, 5 parts of silicone polyether emulsion and 40 parts of deionized water.

Example 7

The diamond wire lubricating cooling liquid comprises the following preparation raw materials in parts by weight: 30 parts of ethylene glycol, 1 part of sodium benzoate, 2 parts of sodium sorbate, 3 parts of polydimethylsiloxane, 2 parts of sodium silicate, 1 part of triethanolamine, 3 parts of triethanolamine borate, 8 parts of diisooctyl sebacate, 6 parts of dioctyl sebacate, 8 parts of petroleum sodium sulfonate, 10 parts of dithioacetamide, 5 parts of silicone resin polyether emulsion and 40 parts of deionized water.

Example 8

The diamond wire lubricating cooling liquid comprises the following preparation raw materials in parts by weight: 30 parts of ethylene glycol, 1 part of sodium benzoate, 2 parts of sodium sorbate, 3 parts of polydimethylsiloxane, 2 parts of sodium silicate, 1 part of triethanolamine, 3 parts of triethanolamine borate, 8 parts of diisooctyl sebacate, 6 parts of dioctyl sebacate, 65014 parts of oxyethylene alkylolamide, 4 parts of petroleum sodium sulfonate, 15 parts of dithioacetamide and 40 parts of deionized water.

Example 9

The diamond wire lubricating cooling liquid comprises the following preparation raw materials in parts by weight: 30 parts of ethylene glycol, 1 part of sodium benzoate, 2 parts of sodium sorbate, 3 parts of polydimethylsiloxane, 2 parts of sodium silicate, 1 part of triethanolamine, 3 parts of triethanolamine borate, 8 parts of diisooctyl sebacate, 6 parts of dioctyl sebacate, 65014 parts of oxyethylene alkylolamide, 4 parts of petroleum sodium sulfonate, 15 parts of silicone resin polyether emulsion and 40 parts of deionized water.

The preparation method of examples 1 to 9 was: adding an emulsifier, an extreme pressure agent, an antirust agent, a preservative and a wetting agent into deionized water, and uniformly stirring; adding ethylene glycol, dispersant and defoamer, and stirring for 5h to obtain the product.

Example 10

The diamond wire lubricating cooling liquid comprises the following preparation raw materials in parts by weight: 30 parts of ethylene glycol, 1 part of sodium benzoate, 2 parts of sodium sorbate, 3 parts of polydimethylsiloxane, 2 parts of sodium silicate, 1 part of triethanolamine, 3 parts of triethanolamine borate, 8 parts of diisooctyl sebacate, 6 parts of dioctyl sebacate, 65014 parts of oxyethylene alkylolamide, 4 parts of petroleum sodium sulfonate and 40 parts of deionized water.

The preparation method of example 10 is as follows: adding an emulsifier, an extreme pressure agent, an antirust agent, a preservative and a wetting agent into deionized water, and uniformly stirring; adding ethylene glycol and defoaming agent, and stirring for 5h to obtain the product.

In examples 1 to 10, the preservative was sodium benzoate and sodium sorbate, the antifoaming agent was polydimethylsiloxane, the extreme pressure agent was sodium silicate, the rust inhibitor was triethanolamine and triethanolamine borate, the wetting agent was diisooctyl sebacate and dioctyl sebacate, the emulsifier was ethylene oxide alkylolamide 6501 and/or sodium petroleum sulfonate, and the dispersant was dithioacetamide and/or silicone polyether emulsion.

1. Stability test

The samples 1-10 were stored in a sealed condition at 55 ℃ for 15 days, and the time of turbidity was recorded in days, and if no turbidity occurred after 15 days of storage, the record was "none";

2. average wear scar diameter test

The average wear scar diameters in mm were determined for examples 1-10 according to GB/T12583-1998.

The test data are listed in the table below.

	Stability (Tian)	Average wear scar diameter (mm)
			Example 1	Is free of	0.254
Example 2	13	0.273
			Example 3	10	0.269
Example 4	Is free of	0.325
			Example 5	Is free of	0.308
Example 6	9	0.279
			Example 7	8	0.274
Example 8	Is free of	0.413
			Example 9	Is free of	0.446
Example 10	Is free of	0.533

The foregoing examples are merely illustrative and are provided to illustrate some of the features of the present disclosure. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. And that advances in science and technology will result in possible equivalents or sub-substitutes not currently contemplated for reasons of inaccuracy in language representation, and such changes should also be construed where possible to be covered by the appended claims.

Claims

1. The lubricating cooling liquid for the diamond wire is characterized by comprising the following preparation raw materials in parts by weight: 10-50 parts of ethylene glycol, 1-5 parts of preservative, 1-3 parts of defoaming agent, 1-3 parts of extreme pressure agent, 1-10 parts of antirust agent, 10-20 parts of wetting agent, 6-10 parts of emulsifier, 10-20 parts of dispersant and 20-50 parts of deionized water;

the emulsifier is a mixture of polyoxyethylene alkylolamide 6501 and petroleum sodium sulfonate, and the weight ratio of the polyoxyethylene alkylolamide 6501 to the petroleum sodium sulfonate is 3: 1;

the dispersing agent is a mixture of dithioacetamide and silicone resin polyether emulsion; the weight ratio of the dithioacetamide to the silicone polyether emulsion is 2: 1.

2. a diamond wire lubricating coolant as claimed in claim 1, wherein the preservative is selected from at least one of benzoic acid or a salt thereof, sorbic acid or a salt thereof.

3. A diamond wire lubricating coolant as claimed in claim 1, wherein the defoaming agent is at least one selected from the group consisting of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether, and polydimethylsiloxane.

4. A diamond wire lubricating coolant as claimed in claim 1 wherein the extreme pressure agent is selected from borax and/or sodium silicate.

5. A diamond wire lubricating coolant as set forth in claim 1, wherein the rust inhibitor is at least one selected from triethanolamine borate, triethanolamine, sodium molybdate, and barium petroleum sulfonate.

6. A diamond wire lubricating coolant as claimed in claim 1, wherein the wetting agent is at least one selected from the group consisting of alkyl alcohol polyoxyethylene ether, alkyl alcohol polyoxyethylene polyoxypropylene ether, alkylamine polyoxyethylene ether, and alkyl alkanoate.

7. A method for preparing a diamond wire lubricating coolant as claimed in any one of claims 1 to 6, comprising the steps of: adding an emulsifier, an extreme pressure agent, an antirust agent, a preservative and a wetting agent into deionized water, and uniformly stirring; adding ethylene glycol, dispersant and defoamer, and stirring for 5h to obtain the product.

8. Use of a diamond wire lubricating coolant according to any one of claims 1 to 6 in single crystal silicon, polycrystalline silicon, silicon wafers, quartz, indium gallium nitride, gallium arsenide, germanium processing.