JP5705041B2 - Mist inhibitor - Google Patents

Description

  The present invention relates to a mist suppressant for lubricating oil, and in particular, a processing oil, gear oil, chain oil, hydraulic oil, rock drilling oil used in cutting, grinding or plastic working of metal members and brittle materials. It is related with the additive which can suppress generation | occurrence | production of mist at the time of use regarding the equipment and the lubricating oil for machines which are used for the above.

In cutting and grinding, machining fluids are used for the purpose of cooling the tool and work material, improving machining efficiency and machining accuracy by providing lubrication performance, and extending the tool life.
The processing oil is processed into fine particles due to high shearing force due to the high-speed movement of the tool and work material at the processing site, and further, the base oil and other compounds added to it by frictional heat between the tool and work material during processing. Vaporizes and agglomerates at ambient temperature to form a fine shape and stay in the environment as oil mist. Such oil mist fills the workplace environment, and particularly those having a size of 10 μm or less may enter the body due to the worker's breathing and have a negative effect on health.
Similarly, oil mist is generated by frictional heat and shearing force accompanying operation in equipment such as pump oil, compressor oil, chain oil, rock drilling oil, and lubricating oil for machinery.
As a method for reducing oil mist generated in the environment, a method corresponding to facilities such as a local exhaust system and various air purifiers in an indoor work place, and adding a polymer compound to the processing oil give viscosity. Or the method of using oil with little content of a low boiling point substance is known.
In these methods, a high capital investment is necessary when taking measures to reduce equipment. Even when additives are used in processing oil, there are still many problems as shown below.

As examples of using additives in processing oil, JP 2000-129282 A and JP 10-046178 A report on water-soluble or water-dispersible polymer compounds. On the other hand, there are JP-A-2008-248110 and JP-A-8-512334 which are used for oils such as hydraulic oil and engine oil.
However, when such a polymer is used, the molecular chain is broken due to mechanical stress applied during use, and the viscosity necessary to suppress mist cannot be maintained over a long period of time, such as an unnecessary increase in viscosity. There was a problem inviting. In addition, when poly (meth) acrylic acid is used, it interacts with calcium ions, magnesium ions from industrial water and well water to be used, or various polyvalent metal ions eluted from the work material, and is a water-insoluble aggregate. There is a problem that the effect of oil mist suppression is reduced, the scale is generated, and piping is clogged, rotted, or caused by contamination.
On the other hand, polymers containing ester groups such as methyl methacrylate are also alkaline in water-soluble processing oils, so they are susceptible to hydrolysis and are not stable enough to withstand long-term use. It was.

JP 2000-129282 A Japanese Patent Laid-Open No. 10-046178 JP 2008-248110 A Japanese National Patent Publication No. 8-512334

The present invention relates to metal parts such as steel, alloy steel and aluminum, processing oils such as cutting and grinding of brittle materials such as quartz, silicon, ceramics and carbon, equipment and machines such as pump oil, compressor oil and chain oil. It is an object of the present invention to provide a mist suppressant that suppresses mist that is a factor of deterioration of the working environment without impairing processing performance and lubrication performance.

As a result of researches to solve such problems, the present inventors have found that amphoteric electrolytes are useful. Among them, a compound having an inorganic value / organic value = 0.4 to 2.1, particularly a mist containing a betaine derivative. The present invention was completed by finding that the inhibitor is effective for suppressing mist and that the addition does not affect the performance.
That is, the present invention
(1) A mist inhibitor composition comprising an amphoteric electrolyte as an active ingredient, wherein the amphoteric electrolyte is a betaine derivative represented by inorganic value / organic value = 0.4 to 2.1. A mist suppressor composition,
(2) The mist inhibitor composition according to (1), wherein the betaine derivative is a compound represented by any one of the following general formulas 1 to 5;
(R _{1 to} R ₁₉ represent a linear or branched alkyl group, alkenyl group, or hydroxyalkyl group. X represents a carboxyl group or a sulfo group.)
(3) The mist inhibitor composition as described in (1) or (2) above, which contains a metal rust inhibitor and / or a pH adjuster,
(4) A processing oil composition comprising the mist inhibitor composition according to any one of (1) to (3) ,
(5) A lubricating oil composition comprising the mist inhibitor composition according to any one of (1) to (3) is provided.

  The mist inhibitor of the present invention is a metal oil, a processing oil used in cutting or grinding or plastic working of brittle materials, gear oil, chain oil, hydraulic oil, rock drilling oil, etc. By mix | blending with the lubricating oil for machines, generation | occurrence | production of the mist generate | occur | produced at the time of use can be suppressed. As a result, it is not necessary to improve the working environment, reduce the amount of oil used, and install a mist dust collector, so that production costs can be reduced.

Hereinafter, the present invention will be described in detail.
The present invention includes a mist inhibitor, a metal member such as steel, alloy steel, and aluminum containing the same, a processing oil such as cutting, grinding, etc. of brittle materials such as quartz, silicon, ceramics, and carbon, pump oil, This applies to equipment such as compressor oil and chain oil, and lubricating oil for machinery.
In the above-mentioned processing oil and lubricating oil, the amount of mist generated is suppressed, and specifically, the working environment is improved, the safety of workers is ensured for the long term, and the production cost is reduced by reducing the usage amount. .

  The ampholyte which is an active ingredient of the mist inhibitor of the present invention is, for example, an amino acid, a copolymer of an anionic monomer and a cationic monomer, a low molecular compound having a betaine structure, or a high molecular compound having a betaine structure. Specific examples of amino acids include L-phenylalanine, proline, aspartic acid stearate, a copolymer of an anionic monomer and a cationic monomer, (meth) acrylic acid, maleic acid, Fumaric acid, itaconic acid, vinyl sulfonic acid, styrene sulfonic acid, (meth) acrylamide dodecanoic acid or sodium salts, potassium salts, amine salts, and cationic monomers such as dimethylaminopropyl (meth) acrylamide, diethylaminopropyl Vinyl monomers having a tertiary amino group such as (meth) acrylamide, or salts thereof such as hydrochloric acid, sulfuric acid, acetic acid, etc., or the tertiary amino group-containing vinyl monomer and methyl chloride, benzyl chloride, dimethyl sulfate, Vinyl monomers, and the like containing a quaternary ammonium salt such as chlorohydrin. Betaine derivatives include alkylbetaine-type lauryldimethylaminoacetic acid betaine, stearyldimethylaminoacetic acid betaine, lauric acid amidopropyl betaine, coconut oil fatty acid amidopropyl betaine, lauryl hydroxysulfobetaine, imidazolinium betaine type 2-alkyl-N. One or more of -carboxymethyl-N-hydroxyethylimidazolinium betaine, amine oxide type lauryl dimethyl ether amine, lauryl amidopropylamine oxide, amino acid type sodium lauroyl glutamate, and the like are included as constituents.

Among these, the ratio of the inorganic value to the organic value in the organic conceptual diagram is preferably 0.2 to 4.0, more preferably 0.4 to 2.1, and particularly a betaine structure. A compound having is preferred. Specific examples include lauryl betaine, palm kernel fatty acid amidopropyl betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolium betaine and the like.

The ratio of the betaine derivative, which is an active ingredient of the mist inhibitor, to the processing oil or the lubricating oil is 0.01 to 50% by mass in use. Preferably it is 0.1 to 20%, More preferably, it is 0.5 to 5%.
If it is 0.01% or less, sufficient effects cannot be exhibited, and if it exceeds 50%, compatibility with other additives may be deteriorated or foaming may be caused, which is not desirable in terms of cost.

  The oil mist inhibitor of the present invention contains, as a constituent, one or more amphoteric electrolytes, desirably one or more of betaine derivatives exhibiting an inorganic value / organic value = 0.4 to 2.1. Conventional additives used in various oils, such as base oils, synthetic oils, metal rust preventives, oily agents, extreme pressure agents, antifoaming agents, nonferrous metal anticorrosives, antiseptics, sequestering agents, interfaces An active agent can be included.

Base oils include mineral oils and synthetic oils such as polyolefins, polyol esters, and polyethers.
Examples of metal rust preventives and pH adjusters include organic acids and alkali components, but organic acids include [monoalkyl carboxylic acids].
Acetic acid, propanoic acid, butanoic acid, pentanoic acid, hexanoic acid, octanoic acid, 2-ethylhexanoic acid, nonanoic acid, caproic acid, enanthic acid, capric acid, caprylic acid, undecanoic acid, undecylenic acid, dodecanoic acid, tridecanoic acid, Pentadecanoic acid, heptadecanoic acid, nonadecanoic acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, isostearic acid, elaidic acid, oleic acid, linoleic acid, linolenic acid, ricinoleic acid, lactic acid, hydroxylauric acid , Hydroxymyristic acid, hydroxypalmitic acid, hydroxystearic acid, hydroxyarachidic acid, hydroxybehenic acid, hydroxyoctadecenoic acid, dodecyl succinic acid, lauryl succinic acid, stearyl succinic acid, isostearyl succinic acid, naphthenic acid Benzoic acid, para tertiary butyl benzoic acid, phthalic acid, salicylic acid [dicarboxylic acid]
Malic acid, citric acid, oxalic acid, malonic acid, succinic acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, isophthalic acid, terephthalic acid and other organic carboxylic acids, and phosphoric acid, phosphonic acid Examples include acids and sulfonic acids.
Furthermore, you may use together inorganic type rust preventives, such as a phosphate, a silicate, bicarbonate.
Among them, monocarboxylic acids having 6 to 12 carbon atoms (hexanoic acid, caprylic acid, decanoic acid, lauric acid, etc.), dicarboxylic acids (eg azelaic acid, sebacic acid, dodecanedioic acid, etc.), or benzoic acid derivatives (tert-butylbenzoic acid) Acid, hydroxybenzoic acid, etc.), phosphoric acid and phosphonic acid derivatives are preferably ethylenediaminetetramethylenesulfonic acid and hydroxyethanediphosphonic acid.

Examples of the alkali component include alkali metal, ammonia, and alkanolamine. Examples of the alkali metal include sodium and potassium, and examples of the alkanolamine include monoethanolamine, mono (iso) propanolamine, monobutanolamine, diethanolamine, di (iso) propanolamine, dibutanolamine, and monoethanolmono (iso). Examples include propanolamine, monoethanol monobutanolamine, mono (iso) propanol monobutanolamine, triethanolamine, and triisopropanolamine.
These metal rust inhibitors need to maintain a pH of 8.0 to 12.0 when mixing an organic acid and an alkali component in order to obtain good rust prevention properties.

Examples of oily agents include fats and oils, long chain fatty acids having 8 to 36 carbon atoms, such as octylic acid, lauric acid, palmitic acid, oleic acid, stearic acid, and esters of these fatty acids and monohydric and polyhydric alcohols, For example, esters composed of octyl alcohol, lauryl alcohol, palmityl alcohol, oleyl alcohol, stearyl alcohol, or amides composed of alkylamine, such as amides composed of octylamine, laurylamine, palmitylamine, oleylamine, stearylamine Can be mentioned.
Examples of extreme pressure agents include zinc dioctyl dithiophosphate and dilauryl dipropionate.

Non-ferrous metal anticorrosives include sodium metasilicate, sodium orthosilicate, 1,2,3-benzotriazole, 1- {N, N-bis (2-ethylhexyl) aminomethyl} benzotriazole, carboxybenzotriazole, mercapto Examples include benzothiazole. In addition, a nonferrous metal anticorrosive agent can also use together 1 type, or 2 or more types.
Examples of preservatives include O-phenylphenol, benzothiazoline, and triazine compounds.

Examples of the sequestering agent include ethylenediaminetetraacetate, nitrilotriacetate, 1-hydroxyethylidene-1,1-diphosphonate, citrate and the like.
Examples of the surfactant include nonionic hydrocarbon surfactants such as polyoxyethylene alkyl ether and carboxylic acid alkanolamide.

  The mist inhibitor of the present invention may be added directly to various oils, or may be added to a diluted working fluid in a water-soluble processing oil used by diluting with water.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated further more concretely, this invention is not limited to a following example.

The test solutions shown in Tables 1 and 2 were prepared, 15% was added to Yushiroken FGE234, which is a general-purpose processing oil, and the amount of floating mist was evaluated using a mist generator.
Amphoteric electrolyte and lauryl betaine 31% aqueous solution used in Examples; Amphital 20BS (manufactured by Kao)
-Palm nuclear fatty acid amidopropyl betaine 30% aqueous solution; Nissan Anon BDC-SF (manufactured by NOF Corporation)
-2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolium betaine 40% aqueous solution; Amphital 20YB (manufactured by Kao)
Stearyl dimethylamine oxide 35% aqueous solution; Unisafe A-SM (manufactured by NOF Corporation)
Coconut oil amidopropylamine oxide 30% aqueous solution; BarloxC (Lonza)
Amphoteric electrolyte , trimethylglycine used in Reference Example ; (Asahi Kasei Chemicals)
Nonionic surfactant and polyether type polyoxyethylene oleyl cetyl ether used in Comparative Example; Neugen ET-69 (Daiichi Kogyo Seiyaku)
・ Polyetheramine type hydroxyethyl laurylamine; Naimine L-201 (manufactured by NOF Corporation)

<Evaluation method of mist amount>
Using a mist generator (FIG. 1), mist was generated in a test chamber 7 m × 5.5 m × 2.7 m (t), an ejection amount 30 g, an ejection time 1 hour, an ejection pressure 3 kPa, and a generator temperature 60 ° C. . Immediately after the ejection was completed, the amount of mist floating was evaluated with a mist amount evaluator.

(Figure 1)

<Mist amount evaluator>
Dust Track II MODEL 8530 (TSI)
Suction speed 3L / min, measurement time 1min, 10μm impactor

According to Table 3, it turns out that the processing oil agent of Examples 1-5 shows the high mist suppression effect compared with Comparative Examples 1-3.

As described above, the amphoteric electrolyte of the present invention, and in particular, the mist inhibitor containing any one or more of the betaine derivatives represented by inorganic value / organic value = 0.4 to 2.1 as a constituent component is a metal For equipment used for metalworking fluids, gear oils, chain oils, hydraulic oils, rock drilling oils, etc. used in cutting, grinding or plastic working of parts and brittle materials, and for machine lubricants It is possible to suppress the occurrence of mist that deteriorates the working environment.

Claims (5)

A mist suppressor composition comprising an amphoteric electrolyte as an active ingredient, wherein the amphoteric electrolyte is a betaine derivative represented by inorganic value / organic value = 0.4 to 2.1. A mist inhibitor composition characterized by the above. The mist inhibitor composition according to claim 1, wherein the betaine derivative is a compound represented by any one of the following general formulas 1 to 5.
(R _{1 to} R ₁₉ represent a linear or branched alkyl group, alkenyl group, or hydroxyalkyl group. X represents a carboxyl group or a sulfo group.) It is a mist inhibitor composition of Claim 1 or 2 , Comprising: A metal rust inhibitor and / or a pH adjuster are contained, The mist inhibitor composition characterized by the above-mentioned. The processing oil composition containing the mist inhibitor composition as described in any one of Claims 1-3 . The lubricating oil composition containing the mist inhibitor composition as described in any one of Claims 1-3 .