JPH11323374A - Hydraulic oil not-withering plants - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a hydraulic oil which does not wither plants and does not affect natural environment by formulating a specific amount of a surface active agent with a mineral oil as a basic oil. SOLUTION: A hydraulic oil is obtained by formulating 0.5-50 pts.wt. of an surface active agent and if necessary additives including 0.1-5.0 pts.wt. of a rust preventive, 0.1-2.0 pts.wt. of an anti-oxidant, 0.1-1.0 pts.wt. of a defoaming agent, 0.1-2.0 pts.wt. of an extreme pressure agent, a metal-inactivating agent, an abrasion resistant agent, an abrasion-controlling agent, a viscosity improving agent and the like with 100 pts.wt. of a basic oil comprising mineral oils. The mineral oil includes a paraffin-based mineral oil having a viscosity grade VG of 32-100, a naphthenic mineral oil and an aromatic mineral oil and among them the paraffin-based mineral oil having a viscosity grade VG of 32-68 is the most preferable. The surface active agent to be used includes an anionic surface active agent such as a sodium dodecylethersufonate, an octylalcoholphosphate and the like, a cationic surface active agent such as a lauryl amine and the like and a nonionic surface active agent such as a sorbitanalkylether and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic oil which is applied to a plant and which does not die of the plant and which emphasizes the natural environment.

[0002]

2. Description of the Related Art Hydraulic oils widely used as pressure transmitting means include construction machines such as brakes, hydraulic presses and hydraulic shovels, general-purpose machines such as agricultural machines and lawn mowers, and automobile-related machines such as dump trucks. Is indispensable for the machine. Due to its application, a high pressure is applied to the hydraulic oil during use, so that the hydraulic oil may leak from the narrow gap of the machine little by little and contaminate the surroundings. In the case of machines installed indoors, such as hydraulic presses, a certain amount of leaked oil can be managed relatively easily, and in the case of construction machines and dump trucks used at construction sites and debris hauling sites, oil leakage can be prevented. Oil is not so much of a problem.

However, in the case of a machine used in a natural environment, such as an agricultural machine, a lawnmower, or a construction machine, the leaked hydraulic oil cannot be ignored. When hydraulic oil is applied to plants such as lawns, flowers and weeds, the oiled plants die, destroying nature and damaging the beautiful green aesthetics. Recently, there has been a problem of lawn death and discoloration due to a hydraulic oil leak accident caused by a mower at an amusement park or a riverbed.

[0004] In order to solve this problem, several attempts have been made to improve the hydraulic oil itself as follows. JP-A-9-279176 discloses (a) an organic compound having an ester bond in the molecule, (b) a low-viscosity poly-α-olefin, (c) liquid paraffin, (d) a highly refined hydrocarbon oil and (e) ) W / O excellent in biodegradability and waste liquid treatment, obtained by water-dispersing a water-soluble oil composition containing at least one vegetable oil as a base oil using a specific type of surfactant.
A water-solubilized oil composition is disclosed. However, the present invention relates to an aqueous oil composition, and does not describe prevention of plant death.

Japanese Unexamined Patent Publication No. Hei 7-316580 discloses a tapping oil agent for tap water containing a synthetic ester oil and / or a natural fat or oil as a base oil and a surfactant excellent in biodegradability. The present invention does not relate to the hydraulic oil to which the present invention relates. There is no description of plant death. JP-A-6-57279 discloses that one or two or more selected from (A) a surfactant containing no nitrogen, (B) an alkaline earth metal carbonate, zinc (II) carbonate and an alkaline earth metal salt. Disclosed are water-soluble lubricating oil compositions containing more than one species and mineral oil, the effluent of which does not adversely affect the global environment. The present invention aims at preventing eutrophication of rivers and the sea, and preventing generation of NOx at the time of incineration, and does not consider plant death.

[0006] Japanese Patent Publication Nos. 2694106 and 2694107 disclose a cutting oil comprising a mineral oil and a specific surfactant (diisopropyl ester of a linear saturated dicarboxylic acid having 4 to 6 carbon atoms). ing. The present invention relates to a cutting oil that can be easily removed from an object to be washed by using only water without using a harmful cleaning agent and has little effect on the environment and the human body, but does not consider plant death. . It also relates to cutting oil, not hydraulic oil. JP-A-8-31466 discloses that the content of isolated trans isomer in triglyceride-constituting fatty acids is 40%.
A biodegradable animal and vegetable lubricating oil having an iodine value of 50 to 90% by weight or more is disclosed. This is intended to have a low melting point and a high viscosity necessary for a lubricating oil, and is not intended for a hydraulic oil, and does not describe the consideration of plant death. There is no known hydraulic oil that takes into account prevention of plant mortality in the case of plant exposure.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hydraulic fluid which does not die even when it spills on plants or spills on grassland and does not affect the natural environment. .

[0008]

SUMMARY OF THE INVENTION The present invention relates to a non-aqueous hydraulic oil comprising a mineral oil as a base oil and a surfactant added thereto. The hydraulic fluid of the present invention can be easily washed from the leaves of a plant by spraying with water even if it leaks and hangs on the plant, without blocking pores, without impairing photosynthesis, and preventing death. The feature is that it can be.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The hydraulic fluid of the present invention is a non-aqueous hydraulic fluid containing a mineral oil as a base oil and a surfactant added thereto. The amount is 0.5 to 50 parts by weight, preferably 1.0 to 30 parts by weight, more preferably 5 to 10 parts by weight based on 100 parts by weight of the base oil. If the amount of surfactant is less than 0.5 parts by weight,
Hydraulic oil applied to the plant is difficult to wash even with water,
Plants cannot be adequately protected from withering. On the other hand, if the amount of the surfactant is more than 50 parts by weight, the function as a hydraulic oil is adversely affected, which is not preferable.

In the present invention, as the mineral oil, any of paraffinic mineral oil, naphthenic mineral oil and aroma mineral oil can be used. Examples of the paraffinic mineral oil include VG
32-100 paraffinic mineral oils.

As naphthenic mineral oil, for example, VG
And 32 to 100 naphthenic mineral oils.

[0012] As the aromatic mineral oil, for example, VG3
2-100 aroma mineral oils. These mineral oils can be used as a mixture of two or more. Particularly preferred mineral oils are VG 32-68 paraffinic mineral oils.

In the present invention, as the surfactant, any of an anionic surfactant, a cationic surfactant and a nonionic surfactant can be used. Examples of the anionic surfactant include monocarboxylic acids such as aliphatic saturated monocarboxylic acids having 2 to 60 carbon atoms, aliphatic unsaturated monocarboxylic acids having 4 to 60 carbon atoms, and aromatic monocarboxylic acids having 6 to 60 carbon atoms. Alkali metal salts; alkali metal salts of dicarboxylic acids such as aliphatic saturated dicarboxylic acids having 2 to 25 carbon atoms, aliphatic unsaturated dicarboxylic acids having 4 to 25 carbon atoms, and saturated dicarboxylic acids having 8 to 25 carbon atoms; Metal salts of sulfuric acid monoesters of sulfuric acid with aliphatic alcohols, polyoxyethylene alkyl ethers, aliphatic monoglycerides, aliphatic polyhydric alcohols, and the like; sulfonates such as alkali metal salts of alicansulfonic acid and petroleum sulfonates; phosphoric acid Esters and the like.

Specific examples of the carboxylic acid constituting the alkali metal salt of carboxylic acid include, for example, propionic acid, butyric acid, valeric acid, caproic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, undecanoic acid, lauric acid , Tridecylic acid, myristic acid, pentadecylic acid,
Saturated aliphatic monocarboxylic acids such as palmitic acid, margaric acid, stearic acid, nonadecylic acid, arachidic acid, henicosanoic acid, behenic acid, triosanoic acid, lignoceric acid, and heptacosanoic acid; undecylenic acid, oleic acid,
Unsaturated monocarboxylic acids such as ceracoleic acid; aromatic monocarboxylic acids such as benzoic acid, toluic acid and isomers thereof; oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, speric acid, Azelaic acid, sebacic acid, 1,9-nonamethylene dicarboxylic acid,
1,10-decamethylene dicarboxylic acid, 1,11-undecane methylene dicarboxylic acid, 1,12-dodecamethylene dicarboxylic acid, 1,13-tridecamethylene dicarboxylic acid,
1,14-tetradecamethylenedicarboxylic acid, 1,15-pentadecamethylenedicarboxylic acid, 1,16-hexadecamethylenedicarboxylic acid, 1,17-heptadecamethylenedicarboxylic acid, 1,18-octadecamethylenedicarboxylic acid and Aliphatic saturated dicarboxylic acids such as these isomers; maleic acid, fumaric acid, 1-nonene-1,9-dicarboxylic acid,
Aliphatic unsaturated dicarboxylic acids such as 2-nonene-1,9-dicarboxylic acid 1-decane-1,10-dicarboxylic acid, 1-tridecene-1,13-dicarboxylic acid; phthalic acid, isophthalic acid,
And dicarboxylic acids such as aromatic dicarboxylic acids such as terephthalic acid.

[0015] Sulfate ester alkali salts include, as hydrophobic groups, higher alcohol residues, saturated and unsaturated oxy fatty acid residues, higher fatty acid ester residues, polyhydric alcohol fatty acid partial ester residues, and alkylphenol PO.
Those having an E (polyoxyethylene) adduct residue are included. Specific examples of the sulfated alkali metal salt surfactant include sodium heptyl sulfate, sodium decyl sulfate, sodium dodecyl sulfate, sodium tetradecyl sulfate, sodium hexadecyl sulfate, sodium octadecyl sulfate, POE (1) dodecyl ether Sodium sulfate, POE (3) sodium dodecyl ether sulfate, POE (5) sodium dodecyl ether sulfate, POE (10) sodium dodecyl ether sulfate, polyoxypropylene (1)
POE (1) sodium dodecyl ether sulfate, polyoxypropylene (3) sodium dodecyl ether sulfate, polyoxypropylene (3) PO
E (5) Sodium dodecyl ether sulfate, P
OE (1) sodium hexadecyl ether sulfate, POE (3) sodium hexadecyl ether sulfate, POE (2) sodium octadecyl ether sulfate, POE (4) sodium octadecyl ether sulfate, 2- (N-caprinoylamino )
Sodium ethyl sulfate and sodium 2- (N-lauroylamino) ethyl sulfate can be mentioned. Preferred are sodium dodecyl sulfate and POE (3-5) sodium dodecyl ether sulfate.

The sulfonic acid alkali salts include those having, as hydrophobic groups, alkyl groups, alkylbenzene groups, alkylnaphthalene groups, higher fatty acid residues, and alkylamide groups. Specific examples of the sulfonic acid alkali salt surfactant include sodium pn-decylbenzenesulfonate, sodium pn-undecylbenzenesulfonate, sodium pn-dodecylbenzenesulfonate,
-Sodium n-tetradecylbenzenesulfonate, p-
Sodium (n-undecyloxy) benzenesulfonate, sodium p- (n-undecylamino) benzenesulfonate, sodium p- (n-decyloxycarbonyl) benzenesulfonate, p- (n-undecanoyloxy) Sodium benzenesulfonate, sodium p- (n-nonyloxycarbonylmethyl) benzenesulfonate, sodium n-hexylbenzenesulfonate, sodium i-octylbenzenesulfonate, sodium n-dodecylbenzenesulfonate, sodium octylsulfonate, decyl Examples thereof include sodium sulfonate and sodium dodecyl sulfonate. Particularly preferred is sodium dodecylbenzenesulfonate.

The phosphate ester type anionic surfactants include, for example, higher alcohol residues, POE adducts of alkylphenols, and fatty acid partial esters of polyhydric alcohols. Specific examples include POE alkyl alcohol phosphates and alkyl phosphates. Particularly preferably, POE (3 to 10)
Octyl alcohol phosphate.

The cationic surfactant includes a quaternary ammonium salt type, an amine salt type, and the like. Specific examples include triethanolamine monoalkylate salts, alkylamide alkylamine salts, and POE alkylamines. Is. Particularly preferred is POE (3 to 10) laurylamine.

Nonionic surfactants include ethylene oxide or propylene ether type such as polyoxyethylene alkyl ether and polyoxyethylene alkyl phenol, ester type of polyethylene glycol and higher fatty acid, and polyhydric alcohol such as glycerin, sorbitol and sucrose. Elters of fatty acids are included. Specific examples of the nonionic surfactant include POE (6) n-hexyl ether, POE (9) decyl ether, POE
(9) 2-butylhexyl ether, POE (6) dodecyl ether, POE (12) dodecyl ether, PO
E (18) dodecyl ether, POE (10) octadecyl ether, POE (20) octadecyl ether,
POE (100) octadecyl ether, POE (1
2) oleyl ether, POE (10) isooctyl phenyl ether, POE (12) nonyl phenyl ether, POE (15) nonyl phenyl ether, polyoxybutylene (2.5) POE (5.3) butyl ether,
Polyoxystyrene (2.6) POE (13.7) octyl ether, sucrose monolaurate, sucrose monomyristate, sucrose palmitate, sorbitan monolaurate, POE (20) sorbitan monolaurate, POE (20) ) Sorbitan monooleate. Particularly preferred are POE (3-20) sorbitan alkyl ethers, POE (3-20) alkyl ethers, alkyl diethanolamides, and polyoxyethylene alkyl esters.

In addition to the above components, the hydraulic fluid of the present invention may further contain other additives as required, such as rust preventives, defoamers, extreme pressure agents, metal deactivators, antiwear agents, and wear agents. Conditioner,
A viscosity modifier can be added. Preferably base oil 1
0.1 to 5.0 parts by weight of the rust inhibitor, 0.1 to 2.0 parts by weight of the antioxidant, and 0.1 to 1.0 parts by weight of the antifoaming agent with respect to 00 parts by weight.
0.1 to 2.0 parts by weight of the extreme pressure agent.

No special method is required for preparing the hydraulic working oil of the present invention, and the mixing and stirring may be performed by a conventional method using a general mixer for preparing a working oil composition. As a typical mixer, for example, a Satake type stirrer can be mentioned.

The hydraulic oil of the present invention can be easily washed off from the leaves of the plant by spraying with water, even if it gets on the plant or spills on the grassland in a large amount, and does not block the pores and impedes photosynthesis. Although it is possible to prevent death, it is possible to make the removal of the hydraulic oil from the plant more effective by brushing, not just watering.

Hydraulic oils are required to have excellent lubricating properties, thermal stability and antifoaming agents as essential properties, but the hydraulic oil of the present invention has sufficient properties as these hydraulic oils and lubricating oils. keeping.

[0024]

The present invention will be described below in detail with reference to examples. Examples 1-4 Base oils, surfactants and various additives were blended at the blending ratios shown in Table 1 to prepare non-aqueous hydraulic oils. The components were mixed by heating the base oil to 60 ° C., dissolving each additive with stirring, and becoming transparent. The resulting hydraulic fluid, on lawns, turf 1 m ² per 2 liters sprayed, 1
At 0 minutes, water was sprayed to observe the subsequent lawn growth and to test the effect of hydraulic oil on the lawn. Spraying water, a method of spraying the lawn 1 m ² per 30 liters of water (Table 1 (A)), was adopted and how adding a brushing brush simultaneously in addition to (Table 1 (B)) . Table 1 shows the effects on the lawn. In this embodiment, the mineral oil VG-32 is ISO (International Organization for Standardization: International)
al Organization for Standardization) with a viscosity of 32 cst at 40 ° C and VG-46.
Is a mineral oil having a viscosity at 40 ° C. of 46 cst. Benzotriazole was used as the rust inhibitor, and 4,4-methylenebis (2,6-ditert-butyl) phenol was used as the antioxidant.

[0025]

[Table 1]

The criteria in the table represent the following: ○: no change in grass growth, Δ: slight discoloration (partially dead) ×: almost all dead.

Examples 5 and 6 88 parts by weight of commercially available hydraulic oil A comprising 88 parts by weight of mineral oil VG-32, 1 part by weight of an antioxidant and 1 part by weight of a rust inhibitor, or 88 parts by weight of mineral oil VG-46 The hydraulic fluid of the present invention was prepared by blending a surfactant as shown in Table 1 with a commercially available hydraulic fluid B consisting of 1 part by weight of an antioxidant and 1 part by weight of a rust inhibitor. This was sprayed on the lawn in the same manner as in Example 1, and the effect on the lawn was examined. The results are shown in Table 1.

Comparative Examples 1 and 2 The above-mentioned commercially available hydraulic oils A and B were directly sprayed on a lawn.
The effect on the lawn was tested. The results are shown in Table 2.

[0029]

[Table 2]

Evaluation of Lubricity The hydraulic oil of Example 1 and the hydraulic oil of Comparative Example 1 were tested for lubricity. ASTM D 28 for lubricity test
82 with a vane pump. The test conditions are as follows. [Test conditions] Pump used: Vickers V-104C vane pump, rotation speed: 1,500 rpm, pressure: 140 kg / cm ² , oil temperature: 50 ° C, tank capacity: 45 liter, flow rate: 34.5 liter / min, test time : 100 hours. The test results are shown in Table 3. Lubricity was represented by vane wear and cam ring wear.

[0031]

[Table 3]

[0032]

The oil-based hydraulic oil of the present invention does not prevent the death of plants such as lawns by contacting the plants with water or more preferably by brushing with water. Therefore, it can be used with confidence in a lawn mower or the like used in a facility where lawns or flowers are growing. Further, the hydraulic oil of the present invention does not lower other necessary performances as a hydraulic oil such as lubricity.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI C10N 30:04 40:08 (72) Inventor Tetsuya Tokitake 2-3-1 Shibukawacho, Yao-shi, Osaka Japan Quaker Chemical Co., Ltd. Inside the company (72) Fukuaki Yamamoto, 2-3-1, Shibukawa-cho, Yao-shi, Osaka Japan Inside Quaker Chemical Co., Ltd. (72) Masahiro Koyama 2-3-1, Shibukawa-cho, Yao-shi, Osaka Japan Quaker・ Inside Chemical Co., Ltd.

Claims (2)

[Claims] 1. A non-aqueous hydraulic oil comprising a mineral oil as a base oil and a surfactant added thereto. 2. The hydraulic oil according to claim 1, wherein the surfactant is mixed in an amount of 0.5 to 50 parts by weight with respect to 100 parts by weight of the mineral oil.