JPH0571638B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a water-soluble cutting and grinding composition, and more particularly to a water-soluble cutting and grinding composition used for belt grinding of stainless steel and the like. [Prior Art] Generally, when manufacturing stainless steel sheets and steel strips, a coil rough polishing process after hot rolling and a coil finish polishing process following skin pass rolling are performed during the manufacturing process. Conventionally, belt grinding oil mainly composed of mineral oil has been used. This conventional belt grinding oil generates many sparks during grinding, which poses a risk of fire, and also generates mist, which significantly worsens the working environment.Especially in the former coil rough polishing process, the coil plate surface is rough or Since the grinding allowance is large, this difficulty has become an extremely serious problem. On the other hand, water-soluble grinding oils do not cause the problems of fire and mist, but they have poor grinding properties and require early replacement of the grinding belt, which increases manufacturing costs.For this reason, conventionally, water-soluble grinding oils Grinding oil mainly composed of mineral oil, so-called neat oil, has been used exclusively. [Problem to be Solved by the Invention] The problem to be solved by the present invention is to solve the above-mentioned drawbacks of conventional neat oil. [Means for Solving the Problems] As a result of intensive studies to solve the above problems, the present inventors have finally found that a composition containing a specific amount of the specific components shown below can solve the above problems, that is, water-soluble However, it has been found that it can be an excellent water-soluble cutting and grinding composition that has excellent grinding performance and does not require early replacement of the grinding belt. Since it is water-soluble, there is no danger of fire, and it goes without saying that it does not generate mist. That is, the present invention is an ethylene oxide propylene oxide adduct of (A) (a) an aliphatic alcohol having 12 to 18 carbon atoms, (b) an aliphatic amide having 12 to 18 carbon atoms, and (c) glycerin, the molecular weight of which is but
3 to 50 parts by weight of at least one selected from the following: Saturated or unsaturated aliphatic carboxylic acids having 11 to 22 carbon atoms and 1 to 22 carbon atoms
Esters of 22 with saturated or unsaturated aliphatic alcohols (provided that at least one of the carboxylic acid or alcohol has an unsaturated aliphatic group)
1 to 30 parts by weight of at least one organic sulfur compound to which 3 to 25% by weight of sulfur has been added, and (C) an alkanol. This invention relates to a water-soluble cutting composition characterized by containing 1 to 30 parts by weight of an amine as a main component. [Function and structure of the invention] The composition of the present invention basically comprises the above (A), (B) and
(C) It is composed of components (A) to (C).
By containing each component in the above specified amount,
For the first time, it exhibits excellent cutting and grinding characteristics, which in turn eliminates the need for early replacement of the grinding elt. Furthermore, since it is water-soluble, there is no danger of fire and no mist is generated. In this case, which one of the above ingredients (A) to (C)
Even if the above-mentioned excellent effects are lacking, the above-mentioned excellent effects will not be exhibited, and furthermore, unless the above-mentioned three components are used together in the above-mentioned specific proportions, the above-mentioned excellent effects will tend to be impaired. First, component (A) of the present invention will be explained. The aliphatic alcohol used in the present invention has 12 to 18 carbon atoms, and includes not only saturated aliphatic alcohols but also unsaturated aliphatic alcohols. In addition, not only monohydric alcohols but also polyhydric alcohols can be used, and even those substituted with appropriate substitutions such as OH groups can be used, for example, oxo alcohols can also be used. Preferred specific examples are:
For example, lauryl alcohol, oleyl alcohol, stearyl alcohol, oxo alcohol,
Trimethylolpropane, etc. Aliphatic amides have 12 to 18 carbon atoms,
The aliphatic group may be not only saturated but also unsaturated. In addition, amides include not only primary amides but also secondary to tertiary amides, and
It may be substituted with an OH group or the like. Preferred specific examples include laurylamide, oleylamide,
Sterylamide, oxoalcoholamide, etc. can be used. This aliphatic alol or (and) aliphatic amide having 12 to 18 carbon atoms is a component mainly for imparting grindability, and in either case, if the carbon number does not reach 12, the grindability is insufficient. Furthermore, when the number of carbon atoms exceeds 18, fluidity tends to decrease. Next, we will explain the ethylene oxide propylene oxide (hereinafter abbreviated as EOPO) adduct of glycerin. This adduct is also a component mainly used to impart grindability, and its molecular weight ranges from 1000 to 10000. Use the one. If the molecular weight does not reach 1,000, grindability is insufficient, and if it exceeds 10,000, solubility decreases. The ratio of ethylene oxide to propylene oxide is 30 to 90% by weight, preferably 40 to 60% by weight; if ethylene oxide is less than 30% by weight, the solubility will be insufficient, and if it is more than 90% by weight, the grindability will be insufficient. In the present invention, this (A) component includes the above (a) to
One or more of the components (c) are used in combination, and the amount used is 3 to 50 parts by weight, preferably 5 to 40 parts by weight. If the amount does not reach 3 parts by weight, the grindability will be insufficient, and 50
When the amount exceeds parts by weight, solubility decreases. Next, component (B) will be explained. This component (B) is used mainly for the purpose of improving grinding performance by imparting extreme pressure properties, and the amount used is 1 to 30 parts by weight. In this case, if it is less than 1 part by weight, the grindability will be insufficient, and if it is more than 30 parts by weight, the solubility will be reduced. Broadly speaking, component (B) is a reaction product obtained by adding 3 to 25% sulfur to an unsaturated carboxylic acid having 11 to 22 carbon atoms, and the other is a reaction product obtained by adding 3 to 25% sulfur to the above carboxylic acid. Esters of saturated or unsaturated aliphatic carboxylic acids having 11 to 22 carbon atoms and saturated or unsaturated aliphatic alcohols having 1 to 22 carbon atoms (provided that at least one of the carboxylic acid or the alcohol has an unsaturated aliphatic group) It is a reaction product obtained by adding 3 to 25% by weight of sulfur to a mixture of at least one substance having an acid value of 20 mgKOH/g or more. Nao 3-25
% by weight indicates that the amount of sulfur in the sulfur additive is 3 to 25% by weight. The number of carbons used here is 11~
Not only monobasic acids but also polybasic acids are used as the unsaturated aliphatic carboxylic acids of 22, and they may be substituted with substituents such as OH groups and other groups. Preferred specific examples include undecylenic acid, oleic acid, erucic acid, linoleic acid, linolenic acid, eleostearic acid, ricinoleic acid, elaidic acid, Linderic acid, arachidonic acid, and the like. In addition, as the unsaturated fatty acid carboxylic acid having 11 to 22 carbon atoms, which is one of the components constituting the above ester, the same unsaturated aliphatic carboxylic acids as mentioned above are used, and as the saturated aliphatic carboxylic acid, monobasic Not only acids but also polybasic acids can be used, and if necessary, suitable substituents such as OH groups may be substituted. Typical specific examples include lauric acid,
tridecylic acid, myristic acid, pentadecylic acid,
Examples include palmitic acid, stearic acid, nonadecylic acid, behenic acid, and eicosanoic acid. As the saturated or unsaturated alcohol which is another component of the above ester, a monohydric or polyhydric alcohol having 1 to 22 carbon atoms is used. Preferred specific examples include methyl alcohol, ethyl alcohol, butyl alcohol, hexyl alcohol, octyl anol, lauryl alcohol,
Examples include oleyl alcohol, stearyl alcohol, and oxo alcohol. In the above-mentioned ester, it is essential that at least one of the above-mentioned carboxylic acid or alcohol is an unsaturated aliphatic group. In this case, if both groups are saturated aliphatic groups, the sulfur will not react with the group, and the target additive will not be used, which is not preferable. This ester is added to the above unsaturated aliphatic carboxylic acid having 11 to 22 carbon atoms, and the acid value of the resulting mixture is 20 mg.
They are mixed so that the concentration is KOH/g or more. If the acid value at this time does not reach the above value, the water solubility will decrease. Component (B) in the present invention is a reaction product obtained by adding 3 to 25% by weight of sulfur to the above-mentioned unsaturated aliphatic carboxylic acid or the above-mentioned mixture, and this reaction is carried out as follows. That is, this sulfur addition reaction is carried out without a solvent, at a reaction temperature of 90 to 120°C, and a reaction time of 30 minutes to 2 hours, and the amount of sulfur added is 3 to 25% by weight, preferably 5 to 20% by weight, based on the carboxylic acid or mixture. React as you see fit. If the amount of sulfur added does not reach 3% by weight, the grindability will be insufficient, and if it exceeds 25% by weight, the odor will increase, which is not preferable. The above reaction is performed using oleic acid (CH ₃ (CH ₂ ) ₆ −CH ₂
=CH- _CH2- ( _CH2 ) ₆ -COOH) as a representative example. When CH ₃ (CH ₂ ) ₆ is abbreviated as R and CH ₂ (CH ₂ ) ₆ -COOH is abbreviated as R', oleic acid is R-CH ₂ -CH=CH
−R′. It is thought that this oleic acid reacts with sulfur in the following manner.

[Table] ↓
R−CH−CH=CH−R′
｜
S ₂
｜
R−CH−CH=CH−R′
The alkanolamine, component (C), used in the present invention is mainly used for the purpose of reacting with component (B) to form an amine salt, which is soluble in water, and the amount of the salt is 1 to 30 parts by weight. It is. In this case, if it is less than 1 part by weight,
The solubility of component (B) tends to decrease, and when the amount exceeds 30 parts by weight, the effect of addition tends to decrease. Specifically, alkanolamines include, for example, monoethanolamine, diethanolamine, triethanolamine, N,N dimethylethanolamine, N,N diethylethanolamine, N,
N-diisopropylethanolamine, N-(β-
Examples include aminoethyl)ethanolamine, N-methylmethanolamine, and N.N-bis(β-aminoethyl)ethanolamine. The water-soluble cutting and grinding composition of the present invention includes the above (A), (B) and
Ingredient (C) is essential, but if necessary, chlorine-based or sulfur-based polar additives such as chlorinated fatty acids, chlorinated fats and oils, chlorinated paraffins, sulfurized fatty acids, etc., and other fats and oils may also be added. I can do it. In addition, various other additives conventionally used in this type of composition can be blended. When using the composition of the present invention, it is diluted with water as appropriate, but it is preferable to dissolve it in water so that the concentration of the composition in use is about 20 to 50% by weight. (Examples) Next, in order to explain the present invention in detail, examples will be given and described. Examples 1 to 3 Compositions were prepared by mixing predetermined amounts (parts by weight) of predetermined components shown in Table 1. Comparative Example A composition was obtained by mixing 92.1 parts by weight of mineral oil, 5.6 parts by weight of wool grease, and 2.3 parts by weight of zinc dithiophosphate. A belt grinding test was conducted on each of the compositions of Examples and Comparative Examples under the following conditions. The results are shown in FIG. However, in FIG. 1, I to C represent the compositions of Examples 1 to 3 in order, and D indicated by a dotted line represents the composition of the comparative example. Belt grinding test conditions Test machine: Southern type surface polisher Material feed speed: 12 m/min Belt speed: 1200 m/min Belt dimensions: 100 x 2100 mm Belt type: Cross belt #60 (Nagatsuka Kogyo AA-
ERS) Grinding pressure: 20Kg/50mm(W) Grinding distance: 500mm Material to be ground: SUS304 10(t)×50(W)×500()mm Contact roll: 250mm(φ), 70duro

[Table] However, the following description in Table 1 represents the following. TEA: Triethanolamine TIPA: Triisopropylamine

[Brief explanation of the drawing]

FIG. 1 represents the results of belt grinding tests for each composition.

Claims (1)

[Scope of Claims] 1 (A) (a) an aliphatic alcohol having 12 to 18 carbon atoms; (b) a fatty acid amide having 12 to 18 carbon atoms; and (c) an ethylene oxide propylene oxide adduct of glycerin. , its molecular weight is
3 to 50 parts by weight of at least one selected from the range of 1,000 to 10,000; , a saturated or unsaturated aliphatic carboxylic acid having 11 to 22 carbon atoms and a saturated or unsaturated aliphatic carboxylic acid having 1 to 22 carbon atoms
Esters of 22 with saturated or unsaturated aliphatic alcohols (provided that at least one of the carboxylic acid or alcohol has an unsaturated aliphatic group)
A mixture of at least one of the following with an acid value of 20 mgKOH/g or more, without solvent, 90
1 to 30 parts by weight of at least one organic sulfur compound to which sulfur has been added such that the amount of sulfur added is 3 to 25% by weight under conditions of 30 minutes to 2 hours at ~120°C, and (C) 1 to 30 parts by weight of an alkanolamine. A composition for water-soluble cutting and cutting, characterized by comprising 30 parts by weight as a main component. 2. A composition for cutting or cutting, characterized in that the composition according to claim 1 is dissolved in water so that the concentration thereof in use is 20 to 50% by weight.