JPS62187800A - Machining fluid for cutting and grinding - Google Patents

Abstract

PURPOSE:To obtain the titled machining fluid having excellent stability and flowability, by polymerizing an ethylenically unsatd. monomer in the presence of water and a particular water-soluble polymeric compd. CONSTITUTION:100pts.wt. water (A) is mixed with 1-150pts.wt. water-soluble polymeric compd. contg. in its constitutional units at least one functional group selected from among an ether group, a hydroxyl group a carboxyl group (e.g., polyethylene glycol) or a mixture of 10wt% or more polymeric compd. with an other water-soluble polymeric compd. thereby obtaining a mixed aq. soln. 1-150pts.wt. ethylenically unsatd. monomer (e.g., acrylic acid) in such an amt. as will provide a weight ratio thereof to component B of 10-1:1-10 and optionally a water-soluble radical initiator are added to the mixed aq. soln., followed by reaction at 10-100 deg.C, preferably 40-70 deg.C for 3-10hr. If necessary, a nonionic surfactant, an inorg. salt, and an org. solvent are added to the reaction product to obtain a water dispersion of a water-soluble polymeric composite. The dispersion is diluted with water to obtain the titled machining fluid.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a grinding/cutting fluid suitable for grinding/cutting, which is a major field of machining.

(Prior technology) As the expression suggests, in the past, straight type oils such as mineral oil were used as machining oils, but in recent years the need for water-soluble machining oils has rapidly increased. It's coming.

The reasons for this need for water-soluble oils are not only the saving of oil pipe resources, but also the risk of fire caused by processing heat, restrictions on the use of equipment under the Fire Service Act, and deterioration of the factory environment due to smoke generation, scattering, etc. The following are the main ones: 1) Against this background, there has been a push towards water-soluble cutting fluids, and water-soluble cutting fluids are becoming more common in the grinding field, but water-insoluble fluids are still being used in the cutting field. There are many.

As is well known, grinding and cutting are essentially the same abrasive processing, but the only difference is that the rake angle of the cutting edge relative to the workpiece material is negative in the former and positive in the latter. However, although grinding reduces the amount of machining per process and is often used for machining difficult-to-machine materials, it is more desirable from the standpoint of efficiency if it can be cut.

Therefore, in the following description, cutting fluids will be collectively referred to as
Grinding oil shall also be included in this.

The purpose of using grinding fluid is to supply it to the contact area between the tool and the workpiece during machining, and its lubricating effect reduces friction between chips and the rake face of the tool, between the ridged surface of the tool and the machined surface, and during chip formation. At the same time, the generated frictional heat is removed to ensure smooth machining, improving machining accuracy and extending tool life.

In order to satisfy the above purpose of use, the performance required of cutting fluids can generally be summarized as follows.

■ Good lubricity. This requires good wettability and high oil film strength.6゜■ Good cooling performance. Low volatilization consumption due to processing heat.

■ Good fluidity and good oil removal from chips.

■ It is transparent, allowing you to clearly see the cutting state, does not emit smoke, and is easy to work with.

■ Chemically stable and able to withstand long-term use and storage.

■ Avoid rust, corrosion, and coloring on workpieces, tools, and machines.

■ Do not harm the human body of workers or the work environment.

Broadly speaking, research oils can be divided into water-insoluble cutting oils, whose main purpose is lubricating, and water-soluble cutting oils, whose main purpose is cooling. 10
The latter is usually used at a slightly higher dilution rate of, for example, 30 to 60 times, with water. Not diluting it from the beginning is mainly a problem in transportation and storage, and does not affect the essence of grinding performance.

In terms of ingredients, insoluble cutting fluids use mineral oil as a base oil, mixed with animal and vegetable oils or ester oils, and are further mixed with extreme pressure additives such as chlorine and sulfur-based compounds depending on the processing purpose. Ru.

Water-soluble cutting fluids include the so-called emulsion type W1, which becomes a milky white emulsion when diluted with water, and the so-called soluble type W2, which becomes a transparent or translucent aqueous solution.
There are seeds. As mentioned above, both types are diluted with a relatively large amount of water before use, which tends to cause rust on machines and processed products, and they have inferior lubricity compared to water-insoluble types, and require measures such as waste liquid treatment. There are drawbacks such as:

Emul Noyon type mainly contains mineral oil and emulsifier, and has superior lubricity compared to Nolupur type.
On the other hand, deterioration during use may cause oil separation, rust formation, or odor due to corrosion. Therefore, rust preventive agents, anti-corrosion agents, oil agents, extreme pressure agents, etc. are further added.

The tree-pull type is mainly composed of a surfactant called an emulsifier and contains some mineral oil, and has anti-rust properties and has low surface tension, so it has good permeability and is widely used for high-speed cutting and grinding. .

(Problems to be Solved by the Invention) The current cutting and grinding fluids have been described above, and although both water-soluble and water-insoluble fluids have their own advantages, overall it is not possible to achieve the advantages of either of them. It is desirable to have something that serves both purposes. In other words, it has the same cooling effect as a water-soluble oil, and at the same time has the same lubricity as a water-insoluble oil, improves the corrosivity caused by rust that occurs with conventional water-soluble oils, and does not contain any oil, making it suitable for waste liquids. There was a strong desire to develop something that would not cause processing problems. From the above viewpoint, the present inventors have completed the present invention by developing a grinding fluid that satisfies the following conditions.

■ It is water-soluble and, unlike the conventional soluple type and emal noyon type, it essentially contains no oil and all of its constituent components are water-soluble.

This is fundamental for the requirements that the workpiece can be cleaned with only water after grinding and cutting, and that there is no need to dispose of waste oil.

■ In its concentrated state, it has the same viscosity and lubricity as oil.
In addition, depending on the degree of dilution with water, it is possible to provide cooling properties equivalent to or better than conventional water-soluble grinding fluids.

■ Excellent rust prevention effect.

For example, if there is no need to apply a rust preventive after grinding and cutting, it will greatly contribute to the machining process in terms of tool life and machine life.

■ It has the characteristics shown in ■ ~ ■, and at the same time, the processability is equal to or better than that of conventional grinding fluids.

For example, in grinding processes, it should not be inferior to conventional grinding fluids in terms of overall evaluation such as grinding ratio, grinding noise, surface roughness, and burning.

■ In addition, other characteristics required for the grinding fluid mentioned above,
In other words, it must be transparent, smoke-free, chemically stable, and have the same or higher safety to the human body.

(Means for Solving the Problems) The present invention has been made to solve the above problems, and the cutting/grinding fluid according to the present invention includes (A) water 100%
(B) a water-soluble polymer compound having at least one functional group selected from the group consisting of an ether group, a hydroxyl group, and a carboxyl group in the polymer constituent unit;
or (C) an ethylenically unsaturated monomer in the presence of a mixed aqueous solution consisting essentially of 1 to 150 parts by weight of a mixture of the polymer compound and another water-soluble polymer compound containing at least 10% by weight. A water-soluble polymer composite with excellent stability and fluidity obtained by polymerizing 1 to 150 parts by weight of 1 to 150 parts by weight of (B) to (C) at a weight ratio of 10:1 to 1:10. Its gist is that it consists of a dispersion liquid or a weeping liquid diluted with water.

Furthermore, the rust prevention effect of the aqueous dispersion of the water-soluble polymer composite,
Type 1 or 2 to improve cooling effect, conductive dust, etc.
By adding one or more inorganic or organic salts, the performance as a cutting/grinding fluid is further improved. The ethylenically unsaturated monomer may be one type or a mixture of two or more types of monomers.

The cutting/grinding liquid of the present invention is an aqueous dispersion of a water-soluble polymer composite with excellent stability and fluidity, which was invented by the inventors of the present invention (JP-A-55-721, JP-A-55-721). 722
, JP-A-55-125109), and has opened up its use as a cutting/grinding fluid.

This aqueous dispersion is a special emulsion called a water/water emulsion, and is obtained by polymerizing a water-soluble ethylenically unsaturated monomer in the presence of a specified water-soluble polymer. This emulsion is a state in which a polymer of water-soluble ethylenically unsaturated monomers (water-soluble polymer) produced by polymerization is dispersed in an aqueous solution of the specified water-soluble polymer, that is, a water/water type. to produce an emulsion. Furthermore, it is thought that a part of the grafting reaction of the water-soluble ethylenically unsaturated monomer with the specified water-soluble polymer takes place during this polymerization process, and this grafted product improves the dispersion stability of the water/water emulsion. This is considered to be a major contribution. This water dispersion of a water-soluble polymer complex with good stability is an emulsion with relatively low viscosity and good fluidity, and since it is composed entirely of water-soluble polymers, it can be diluted with water. , giving a homogeneous polymer mixture. This is significantly different from the general aqueous solution type, in which the viscosity increases linearly as the solid content increases.

Characteristics of grinding and cutting fluids using these water/water emulsions are ■ When used as a thickener, they are significantly larger than aqueous solutions such as general polyacrylic acid, and the viscosity of the aqueous solution when diluted is There are several times as many. When dissolved in water and used as a grinding fluid, it provides lubricity similar to that of a water-insoluble oil, and improves grinding performance.

■ Highly concentrated products are translucent, but as the dilution rate increases, they become colorless and transparent. Therefore, the present invention provides a grinding/cutting fluid that allows for good observation of conditions during grinding/cutting and has excellent workability.

■ It is chemically stable and there is no risk of smoke or combustion.

■ It is harmless to humans and animals.

■ Excellent low-temperature stability, improving workability in winter.

As a cutting/grinding liquid, the aqueous dispersion mentioned above can be used as it is or diluted with water, but
Performance can be further improved by adding inorganic or organic salts to improve cooling and conductivity.

These salts include, for example, inorganic salts such as alkali metals, alkaline earth metals, and ammonia nitrites, sulfites, chromates, and vananates for rust prevention, singly or in combination, to dissipate cutting and grinding heat, Inorganic salts such as nitrates, sulfates, carbonates of alkali metals, alkaline earth metals, and ammonia, .

In addition, nonionic surfactants such as polyethylene glycol and higher alcohols, aliphatic salts,
Anionic surfactants such as higher alcohol sulfate ester salts, liquid aliphatic salts, higher alcohol sulfate ester salts, liquid fatty oil sulfate esters, aliphatic amines, sulfates of aliphatic amides, and aliphatic alcohol phosphate esters, Cationic surfactants such as aliphatic amine salts, quaternary ammonium salts and alkylvinonium salts may also be added. When an inorganic salt is added as an additive for the purpose of rust prevention, a viscous thin film of a highly concentrated water-dispersed two-phase separated emulsion forms as the water evaporates from the diluted state during machining to the workpiece and tools. , the above-mentioned salt is finely dispersed in the structure that coats the machine like an oil film and is separated into two phases, thereby significantly increasing the rust prevention effect.

In addition, a composite grinding fluid in which a comparatively large amount of electrolyte inorganic salt is added to increase the conductivity of the grinding fluid, and combined with electric discharge and electrolysis, is also excellent in terms of rust prevention for tools and machines. Here, the polymerizability of the water-soluble polymer composite having excellent stability and fluidity will be explained in detail.

The water-soluble polymer compound used in the present invention has at least one functional group selected from the group consisting of an ether group, a hydroxyl group, and a carboxyl group in its polymer constituent unit, and specifically, , agar, gum arabic, dextran, starch, starch derivatives,
Representative examples include cellulose derivatives, polyethylene glycol, polypropylene glycol, ethylene glycol-cropylene glycol copolymers, and polyvinyl alcohol. These water-soluble polymer compounds have 1
You may use a species or a mixture of two or more. However, these water-soluble polymer compounds contain functional groups other than ether groups, hydroxyl groups, or carboxyl groups, such as sulfone groups, sulfate ester groups, amine groups, imino groups, tertiary amine groups, quaternary ammonium bases, and hydrazino groups. mixed with at least one line of other water-soluble polymeric compounds, such as polyvinylpyrrolidone, polyvinylbilinone, polyethyleneimine, etc., having at least one functional group selected from the group consisting of May be used.

At that time, the proportion of the water-soluble polymer compound having at least one functional group selected from the group consisting of ether group, hydroxyl group, and carboxyl group in the mixture is:
The content is at least 10% by weight, and if it is less than 10% by weight, it is difficult to obtain the significant effects of the present invention.

The blending amount of these specific water-soluble polymer compounds or mixtures of these compounds and other water-soluble polymer compounds is 100% of water.
1 to 150 parts by weight, preferably 5 to 12 parts by weight
The amount is 5 parts by weight, more preferably 10 to 100 parts by weight. If the amount is less than 1 part by weight, the effect of lowering the viscosity will be small and an aqueous dispersion with excellent stability and fluidity will not be obtained. On the other hand, if the blending amount is 150 parts by weight or more, not only is it difficult to dissolve in water, but also the water-soluble polymer compound itself has a high viscosity, so the viscosity of the aqueous dispersion becomes too high, resulting in poor stability. An aqueous dispersion with excellent fluidity cannot be obtained.

The water-soluble ethylenically unsaturated monomer used in the present invention has, for example, the following general formulas (a) and (b).

It is expressed as (c).

R In the formula, R is a hydrogen atom, a methyl group, or a locale atom, and X is a hydrogen atom, an alkali metal, or
1 is a hydrogen atom or a methyl group, R2 and R3 are the same or different groups and are a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or a hydroxyacyl group having 1 to 5 carbon atoms, and R4 is hydrogen represents an atom or a methyl group, and Y is R5
and R8 represents an alkylene group having 2 to 5 carbon atoms or a hydroquinoalkylene group having 2 to 5 carbon atoms; R6, R7,
R7 and Rlo represent the same or different -CH2COOH, 2 is HaO'7" 7 atoms, 5o50CH3゜10S
o4. Indicates CH35o3 or CH3COO.

Examples of the water-soluble ethylenically unsaturated monomer represented by the formula (a) used in the present invention include acrylic acid, methacrylic acid, sodium acrylate, potassium acrylate, sodium methacrylate, potassium methacrylate, and acrylic acid. Ammonium, ammonium methacrylate, α-chloroacrylic acid, α-bromoacrylic acid, α
-Fluoroacrylic acid, etc.

Examples of compounds represented by the formula (b) include acrylamide, methacrylamide, N-methylacrylamide, N-methylmethacrylamide, N·N/-dimethylacrylamide, NUN'-methylmethacrylamide, NIN'- Dimethylacrylamide, N-N'-
Examples include diethyl methacrylamide, N-methyl-N-ethyl acrylamide, N-methyl-N-ethyl methacrylamide, N-hydroxyethyl acrylamide, N-hydroxyethyl methacrylamide, and the like.

Further, as shown in the above formula (c), for example, N,
N-dimethylaminoethyl acrylate, N,N-trimethylzolopyl acrylate, 1-hydroxy 2-(N,
N-trimethylamino)ethyl acrylate, 2-hydroxy-3-(N,N-trimethylamino)probilme, taacrylate, N-(3-acryloyloxy)-N,
N.

N-trimethylammonium chloride, N-(2-acryloyloxyethyl)-N,N,N-trimethylammonium methanesulfonate, N-(3-methacryloyloxy-2-hydroxypropyl)-N,N,N
-I) Examples include methyl ammonium chloride.

These water-soluble ethylenically unsaturated monomers have the formula (a)
, (b)', and (c) may be used alone or in combination of two or more. Further, these water-soluble ethylenically unsaturated monomers may be used in combination with other water-soluble ethylenically unsaturated monomers that can be copolymerized with the monomer.

In this case, the water-soluble ethylenically unsaturated monomer to be mixed is 50%
It is desirable that the amount is less than % by weight. Other water-soluble ethylenically unsaturated monomers copolymerizable with the water-soluble ethylenically unsaturated monomer include formulas (a) and (b).

Other examples include water-soluble ethylenically unsaturated monomers of the group (c), acrylonitrile, vinylpyrrolidone, vinylpyrison, and vinyl acetate.

The blending amount of these water-soluble ethylenically unsaturated monomers or a mixture of these monomers and other water-soluble ethylenically unsaturated monomers is 1 to 150 parts by weight per 100 parts by weight of water; It is preferably 10 to 100 parts by weight, and the amount of the water-soluble polymer compound to the water-soluble ethylenically unsaturated monomer, or a mixed monomer of this monomer and another water-soluble ethylenically unsaturated monomer. Body weight ratio of 10:1 to 1:10, preferably 5:1 to 1:1
The ratio is 1:5, more preferably 2.5:1 to 1:2.5. If the blending amount is less than 11 parts, a high polymer cannot be obtained due to the low concentration. On the other hand, if the blending amount is 150 parts by weight or more, it is difficult to reduce the viscosity of the aqueous dispersion, and an aqueous dispersion with excellent stability and fluidity cannot be obtained.

In addition, if the polymerization is carried out at a weight ratio of water-soluble polymer compound to water-soluble ethylene monomer outside the range of 10:1 to 1:10, the water-soluble polymer compound may be rich or water-soluble. This results in a rich aqueous solution of the polymer obtained from the ethylene monomer, and the viscosity is controlled by the viscosity of the aqueous solution, making it impossible to obtain an aqueous dispersion with excellent stability and fluidity.

The aqueous dispersion of the water-soluble polymer composite of the present invention has the formulas (a) and (b) in the presence of water and a water-soluble polymer compound.

It is obtained by polymerizing the water-soluble ethylenically unsaturated monomer represented by (C).

The polymerization reaction may be carried out by simply applying heat, but preferably by using a Lanocal initiator, ultraviolet light, or radiation. In carrying out the invention, the presence of water-soluble radical initiators such as hydrogen peroxide, potassium persulfate and ammonium persulfate, or so-called redox initiators in combination with these and reducing agents such as amines or sodium sulfite, is particularly important. It is preferred to polymerize below. The amount of the initiator used is 0.000000000 based on the weight of the water-soluble ethylenically unsaturated monomer.
The method for adding 005 to 1005 to 10 parts by weight may be by adding the entire amount at the beginning of the polymerization, or by adding a portion and adding the remainder as appropriate as the polymerization progresses.

The reaction temperature is between 10 and 100°C, particularly between 40 and 70°C. Moreover, the polymerization time is within the range of 3 to 10 hours. The polymerization reaction can be carried out either batchwise or continuously.

When producing the aqueous dispersion of the present invention, nonionic surfactants such as polyethylene glycol type and higher alcohol type may be used as necessary; Aliphatic salts: higher alcohol sulfate ester salts, liquid fatty oil sulfate esters, fat Anionic surfactants such as group amines, aliphatic amide sulfates, and aliphatic alcohol phosphate esters; cationic surfactants such as aliphatic amine salts, quaternary ammonium salts, and alkylpyridinium salts may be added. In particular, it is preferred to add a nonionic surfactant such as a copolymer of propylene glycol and ethylene glycol.

These surfactants may be used alone or in combination of two or more, and the amount used is 0.0 parts by weight per 100 parts by weight of water.
It is 5 to 50 parts by weight. If the amount is less than 0.05 parts by weight, the effect will not be as great as when no additive is added.

On the other hand, if the blending amount is 50 parts by weight or more, not only the improvement effect due to addition is no longer observed, but also stability may be impaired in some cases, which is not preferable. The surfactant may be added in its entirety at the beginning of the polymerization, or a portion may be added during the polymerization and the remainder may be added as appropriate as the polymerization progresses. Further, these surfactants may be added at the end of polymerization.

Furthermore, when producing the aqueous dispersion of the present invention, inorganic salts having a solubility in water of at least 1% by weight may be added as necessary. Examples of inorganic salts include chlorides, nitrates, sulfates, and phosphates of alkali metals, alkaline earth metals, and ammonia; typical examples include sodium chloride, calcium chloride, calcium nitrate,
Examples include sodium nitrate, ammonium nitrate, potassium sulfate, and calcium phosphate. These inorganic salts are 1
Seeds or two or more types may be mixed, and the amount added is 1 part water
The upper limit of the amount added should be within a range where these inorganic salts are uniformly dissolved in water. The inorganic salts may be added all at once during polymerization, or may be added intermittently during any period from the start of polymerization to the end of polymerization. Also,
These inorganic salts may be added at the end of polymerization.

Furthermore, an organic solvent having a solubility in water of at least 2% by weight may be added to the aqueous dispersion of the present invention, if necessary. Examples of organic solvents include alcoholic solvents such as methyl alcohol, ethyl alcohol, flobyl alcohol, ethylene glycol, and chrycerin, ketone solvents such as acetone and methyl ethyl ketone, ether solvents such as tetrahydrofuran and nooxane, trimethylformamide, dimethylacetamide, etc. Examples include amide solvents. These organic solvents may be used alone or in a mixture of two or more, and can be added in any amount within a range that dissolves in water, but preferably 1 to 50 parts by weight per 100 parts by weight of water. %. The organic solvent is preferably added at the end of the reaction in order to prevent a decrease in the degree of polymerization due to chain transfer to the solvent during polymerization.

The aqueous dispersion thus synthesized is used after being diluted to an appropriate concentration depending on the purpose of grinding or cutting.

In addition, inorganic or organic salts are added for rust prevention, cooling, and conductivity improvement.

The concentration of the aqueous dispersion is preferably 10 to 40% in terms of solid content of the polymer complex.

1-20% of inorganic salts such as nitrites and sulfites alone or in combination for rust prevention, 1-20% of inorganic salts such as nitrates and carbonates for dissipating grinding heat and increasing conductivity, and the balance. The main purpose is to use water as water.

For normal cutting and grinding, the above salts should be 5 to 15% in total.
However, in recent years, composite processing that combines electric discharge, electrolysis, and machining requires the inclusion of more inorganic salts.

For grinding and cutting, for reasons of transportation and storage, the liquid must have a concentration above a certain level, and the above-mentioned composition should be appropriately diluted before use. This is transportation of undiluted solution.

This is because it is actually more convenient to adjust the dilution according to the convenience of storage and the purpose of use, and it is clear that theoretically the final diluted state may be used. Normally, the liquid at a given concentration is 40 to 100 times more effective for grinding, and 1 to 10 times more effective for cutting.
It is used after being diluted twice.

Hereinafter, the present invention will be explained in more detail with reference to Examples.

(Example) Example 1 500- with a stirrer, reflux condenser and nitrogen inlet tube
In a flask, add 100 g of water and polyethylene glycol (
Molecular weight 20000) 20! After adding j and mixing and dissolving, add 30f1 of acrylic acid and 16.65g of sodium hydroxide.
and further added a 10% aqueous solution of sodium hydroxide to adjust pi to 12. Next, while replacing the air in the flask with nitrogen gas, a 0.84% aqueous solution of ammonium, a polymerization initiator, was added to the flask. 37! of an aqueous solution of 1.2- and triethanolamine were added, and polymerization was carried out with stirring at a temperature of 45° C. for 5 hours.

The concentration of the polymer water-water emulsion obtained here was adjusted, and NaNo2 and NaNo3 were added thereto to prepare a grinding fluid with the following composition (hereinafter referred to as Invention Product Ⅰ) (Invention Product 1) Polymer Water- Water emulsion (polymer composite solid content equivalent to 20 g) 7
0 wt%N a No 2
4N a NOs
4H2022 Emulsion type JE-280 (hereinafter referred to as Comparative Example A1) manufactured by Noyonson, which is a typical comparison liquid, and Tree-
Geltie fJs-602C (hereinafter referred to as Comparative Example A2) was used.

A grinding test was conducted using SUS 440C as a work material under the following conditions.

Grinding machine: Mitsui surface grinder Processing method: Surface grinding traverse cut Grinding wheel: 32A bit≠80 Grinding wheel peripheral speed: 2195 m/min Table feed: 6 mm/1pass Table speed: 13 m/min Depth of cut: 10 μ Grinding material: SUS 440, hardened material HRC60
±2 Grinding fluid dilution rate = 50 times These results are shown in Table 1.

From the above, in the product of the present invention, even when compared with typical emulsion and soluble type grinding fluids used as comparative examples, the grinding ratio is the same or higher, and the surface roughness is considerably improved. The surface appearance was also better than when conventional grinding fluid was used. It was found that it was particularly effective in preventing burns, and provided a good balance between lubricating and cooling effects.

Furthermore, regarding the occurrence of rust on the magnetic chucks of processing machines after use, which is important for the maintenance of tools and machines, ordinary grinding fluids contain around 0.05% of anti-corrosion components even after dilution, but the product of the present invention , 4chi x engineering = about 0.08% has a sufficient rust preventive effect, and it has become clear that the effects of the rust preventive on the environment and the human body can be further reduced.

Example 2 100 g of water and 20 g of polyethylene glycol (molecular weight 20,000) were placed in a 500-cm flask equipped with a stirrer, reflux condenser, and N2 inlet tube. ! After adding 9 and mixing and dissolving, acrylamide 30! Add J, add a 0.84% aqueous solution of ammonium persulfate as a polymerization initiator while purging with N2, add 3g of a solution of reethanolamine, and polymerize for 5 hours while stirring at a temperature of 45°C. I did it.

Using the polymer water-water emulsion obtained here with its concentration adjusted, Invention Product (2) was blended in the same manner as Invention I in Example 1 as follows.

(Invention ■) Polymer water-water emulsion 70% (polymer composite: 20% solid content equivalent) Na NO24 NaNO54 Comparative example uses the same thing as Example 1, same as Example 1 Table 2 shows the results of a grinding test conducted under these conditions.

In the product H of the present invention, the grinding ratio, the appearance of the ground surface,
It has become clear that it is significantly superior to conventional products in terms of roughness, etc.

What attracts attention among the grinding surfaces is its extremely high resistance to burnout, which confirms that the inventor's aim for both lubrication and cooling has been achieved.

It was also confirmed that rust on the equipment could be sufficiently prevented by using a diluted rust preventive at a small concentration during use.

Example 3 Next, the following experiment was conducted to examine the rust prevention effect.

Discharge electrolytic grinding was used as the machining method. The reason for this is that in the diluted state used as a grinding fluid, the electrolyte is 0.
．． 7% to make it conductive, which usually leads to problems such as a short lifespan due to corrosion of the processing machine, and the need to apply a sufficient amount of rust preventive agent after use to protect it. there were.

Therefore, the invented product (■) used in Example 2 was diluted to 50%, and 0.7% of NaNO3 was added as an electrolyte to this solution. A 30-fold dilution was used.

The test conditions were as follows.

Machine used: Applied Magnetic Research Newly Manufactured MEEC Micro Cutting Machine EMS-1258 Work Material: Silicon Carbide Sintered Abrasive Ishiji Metal Board, Diamond Abrasive, Grain Size + 2
30/270, Concentration 75 outer diameter 100f
i, thickness 0.5 mm, hole diameter 25.4 mm Cutting conditions: Grinding wheel rotation speed 400 rpm Cutting method Down cut Depth of cut 2 rtan Length of 1 slot 100 m Number of cutting nozzles 30 Electrical conditions 2 AC voltage: 60V Current: 0.5A A test was conducted under the above conditions, and the average load increase (during no load and load) of cutting 30 pieces and the situation in which rust formed on the magnetic chuck after use of the machine were investigated. The results are shown in Table 3.

Table 3 From the table above, when the present invention is used in complex machining that contains a large amount of electrolyte salts, such as electrical discharge and electrolytic grinding, there is a tendency for machining performance to increase slightly without deteriorating, and there are concerns in normal cases. It has been found that this method has a significant effect on corrosion deterioration of mechanical equipment.

(Effects of the Invention) The cutting and grinding fluid according to the present invention is a special emulsion called water/water type emulsion, or one to which inorganic or organic salts are added as rust prevention, cooling, and conductivity improving agents. By diluting it to an appropriate concentration and using it, it has cooling action, lubricating action, rust prevention, etc., and is extremely low-pollution.

Patent applicant: Osaka Kongo Seito Co., Ltd. Showa Denko Co., Ltd.

Claims (1)

[Claims] 1. (A) 100 parts by weight of water and (B) a water-soluble polymer having at least one functional group selected from the group consisting of an ether group, a hydroxyl group, and a carboxyl group in its polymeric constituent unit. (C) an ethylene-based non-aqueous solution in the presence of a mixed aqueous solution consisting essentially of a polymer compound or 1 to 150 parts by weight of a mixture of the polymer compound and another water-soluble polymer compound containing at least 10% by weight; A water-soluble polymer composite with excellent stability and fluidity obtained by polymerizing 1 to 150 parts by weight of a saturated monomer at a weight ratio of (B) to (C) within a range of 10:1 to 1:10. An aqueous dispersion of body fluid or a cutting/grinding fluid made by diluting this with water. 2. (A) 100 parts by weight of water and (B) a water-soluble polymer compound having at least one functional group selected from the group consisting of an ether group, a hydroxyl group, and a carboxyl group in the polymer constituent unit; (C) ethylenically unsaturated monomer 1 to 150 parts by weight of a mixture with another water-soluble polymer compound containing at least 10% by weight of the polymer compound; An aqueous dispersion of a water-soluble polymer composite with excellent stability and fluidity obtained by polymerizing 150 parts by weight at a weight ratio of (B) to (C) in the range of 10:1 to 1:10. , type 1 or 2
A liquid made by adding more than one inorganic or organic salt, or a cutting/grinding liquid made by diluting this with water.