JPH05171172A - Lubricant for point sliding plate - Google Patents

Abstract

PURPOSE:To provide the subject lubricant comprising a mineral or synthetic lubricant oil, a paraffin wax and a specific wax in a constant amount, respectively, holding the point operation time for a long time and preventing the rusting of iron materials used for point-sliding members. CONSTITUTION:The objective lubricant permitting the reduction of labor and the saving of resources and highly reducing the danger of workers comprises (A) 100 pts.wt. of a mineral and/or synthetic lubricant oil such as a poly (alpha- olefin), (B) 1-15 pts.wt. of a paraffin wax such as shellac wax or steel wax having a melting point of 45-89 deg.C and (C) 5-25 pts.wt. of a wax such as a microcystalline wax, a synthetic wax and/or an oxygen-containing wax having a melting point of 80-125 deg.C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricant for a point sliding plate, and particularly to keep the operating function of a railway point for a long time and prevent rusting of iron material used for the point sliding portion. To provide a lubricant that

[0002]

2. Description of the Related Art Conventionally, as a lubricant for points, a liquid lubricating oil such as machine oil or JP-A-54-1206 has been used.
A paste-like lubricant is used at room temperature as shown in No. 06. For example, at each JR company, according to the method specified in the safety equipment cleaning standard for cleaning points, dirt and rust etc. stuck to the floor plate surface are removed with a gold brush or the like, and the dirt is removed with a rag cloth soaked with kerosene. Lubricant is applied on top. However, in cold regions, in order to prevent accidents that occur due to the loss of work function due to the points not working due to freezing of snow in winter,
Point The sliding part is heated by hot air, electric heat, or the like, and the temperature is often 70 ° C. or higher. Further, in the summer, the temperature of the sliding portion of the point becomes 60 ° C. or higher during the day due to the influence of direct sunlight. At such high temperatures, conventional lubricants become liquid, and lubricants with low adhesive strength easily flow out from the sliding plate surface, and the oil film becomes thin. It is easy to cause significant deterioration of function and rusting. Therefore, there is a drawback that the lubricating function cannot be maintained unless the frequency of replenishment oil is increased. Since the oil film was thin, it was necessary to replenish it by spill the day after the rainfall. Therefore,
It is natural that a short interval between oiling and cleaning of points inevitably requires a large number of security workers, which is because the consumption of materials such as lubricants, kerosene, and rags is extremely large. there were. Moreover, since this cleaning work is often done at intervals between vehicle passages, it makes safety work for track maintenance personnel difficult and increases traffic volume.
In the current situation where the operation of the point is being remotely controlled, there is a danger of further increasing human risk.Therefore, the lubrication life is extended to ensure the safety of passing vehicles and workers.
There has been a demand for a lubricant that can save resources and labor by extending the supply period.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lubricant which retains the operating function of the point for a long time and prevents the iron material used in the point sliding portion from rusting.

The present inventors have completed the present invention in response to the above-mentioned demands by earnestly studying to improve the drawbacks of conventional lubricants.

[0005]

Means for Solving the Problems That is, the present invention is (A)
100 parts by weight of mineral oil-based and / or synthetic lubricating oil,
(B) Paraffin wax 1 to 15 having a melting point of 45 to 80 ° C.
Parts by weight, and (C) microcrystalline wax,
At least one wax having a melting point of 80 to 125 ° C. selected from the group consisting of synthetic wax and oxygen-containing wax 5
The present invention provides a lubricant for a point sliding plate, characterized in that the lubricant for a point sliding plate is contained in an amount of 25 to 25 parts by weight.

The lubricating oil (A) in the present invention is not particularly limited, and any mineral oil or synthetic oil can be used as long as it is usually used as a base oil for lubricating oil. As the mineral oil-based lubricating oil, for example, a lubricating oil fraction obtained by distilling crude oil under atmospheric pressure and vacuum distillation, solvent degassing, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing,
Oils such as paraffin-based and naphthene-based oils that have been refined by appropriately combining refining treatments such as hydrorefining, sulfuric acid washing, and clay treatment can be used. Examples of synthetic lubricating oils include polyα-olefins (polybutene, 1-octene oligomer, 1-decene oligomer, etc.) alkylbenzene, alkylnaphthalene, diesters (ditridecylglutarate, di-2-ethylhexyladipate, diisodecyl). Adipate, ditridecyl adipate, di-2-ethylhexyl sebacate, etc.), polyol ester (trimethylol propane acrylate, trimethylol propane pelargonate, pentaerythritol-2-ethylhexanoate, pentaerythritol pelargonate, etc.), polyoxy Alkylene glycol, polyphenyl ether, silicone oil, perfluoroalkyl ether and the like can be used. These lubricating oils may be used alone or in combination of two or more. The kinematic viscosity of these lubricating oils is not particularly limited, but preferably 10
It is 3 to 20 cSt at 0 ° C.

The paraffin wax (B) in the present invention must have a melting point of 45 to 80 ° C, preferably 50 to 75 ° C. If the melting point is higher than 80 ° C, the grease-like lubricant having a strong solidifying action and a viscosity suitable for application cannot be obtained, and if the melting point is lower than 45 ° C, the solidifying action is weak and the oil retaining ability is deteriorated to provide lubrication. It is not preferable because it shortens the life. (B) The paraffin wax having a melting point of 45 to 80 ° C. is, for example, an unrefined paraffin wax separated from a petroleum vacuum distillation distillate, a vacuum distillation residue oil or a heavy distillate oil by a suitable dewaxing method. Specific examples thereof include slack wax and scale wax, and purified paraffin wax obtained by decolorizing and purifying these unpurified paraffin waxes by solvent treatment, sweating, acid / alkali cleaning, clay treatment, hydrogenation, etc. .. The content of the component (B) is 1 to 100 parts by weight of the base oil.
15 parts by weight, preferably 2 to 8 parts by weight. If the content is less than 1 part by weight, a sufficient effect cannot be obtained, and 1
If the amount exceeds 5 parts by weight, the viscosity of the lubricant increases, which is outside the viscosity range suitable for coating, which is not preferable. At least one wax selected from the group consisting of (C) microcrystalline wax, synthetic wax and oxygen-containing wax in the present invention has a melting point of 80 to 125 ° C.,
It is necessary that the temperature is preferably 82 to 120 ° C. Those with a melting point above 125 ° C do not lose their crystallinity in the grease-like lubricant, and sufficient adhesion cannot be obtained due to graininess, and those below 80 ° C are lubricants at the operating environment temperature. Since it is not possible to maintain the grease state of No. 3, the oil retaining capacity is reduced and the lubricating life is shortened, which is not preferable. Examples of the microcrystalline wax in the component (C) include, for example, unpurified microcrystalline wax separated by a suitable dewaxing method from a petroleum vacuum distillation distillate, a vacuum distillation residue oil, a heavy distillate, or the like, or This crude microcrystalline wax is treated with solvent, sweating,
Examples include purified microcrystalline wax that has been decolorized and purified by acid / alkali washing, clay treatment, or hydrogen. As the synthetic wax, for example, a wax obtained by homopolymerization or copolymerization of olefins such as ethylene and propylene, a wax obtained by thermally decomposing a polymer plastic or rubbery polyforein, and a polymer plastic polyolefin are produced. Examples thereof include polyolefin wax such as wax obtained as a by-product, and Fischer-Tropsch wax obtained as a by-product in the production of synthetic hydrocarbons by the Fischer-Tropsch wax method. Examples of carbon-containing waxes include natural waxes such as carnauba wax, montan wax, rice bran wax, beeswax, wood wax, synthetic waxes such as oxidized micro, oxidized paraffin, and secondary modified products by various reactions of these, hydrocarbons. Examples thereof include a polycarboxylic acid modified wax obtained by an addition reaction between a wax and an unsaturated polycarboxylic acid such as maleic acid or an anhydride thereof, or a mixture thereof. The content of the component (C) is 5 to 20 parts by weight, preferably 7 to 18 parts by weight, based on 100 parts by weight of the component (A). If the content is less than 5 parts by weight, a sufficient effect cannot be obtained, and if it exceeds 20 parts by weight, the viscosity of the lubricant increases, which is outside the viscosity range suitable for coating, which is not preferable.

According to the present invention, a desired composition can be obtained by incorporating the above-mentioned components (A), (B) and (C). In order to improve various performances as described above, various components added to ordinary lubricants can be appropriately contained as other components. Examples of these components include a rust preventive, an antioxidant, an oiliness agent, an extreme pressure agent, and an antistatic agent.

Examples of rust preventives include carboxylic acid type, sulfonic acid type, ester type, basic nitrogen compound type, organic sulfur and phosphorus compounds, and the like. Basic barium sulfonate of metal sulfonate and ester type sorbitan monoole. Ato is preferred. As antioxidants, phenol type, amine type, organic phosphite type, sulfur-containing special type and the like are known, and any of them can be used, but 2,6-ditertiarybutyl-4-phenol compound is used. Methylphenol (DBPC) is most suitable. Oily agents, extreme pressure agents such as carboxylic acids, higher alcohols, esters,
There are fats and oils, organic sulfide compounds, chlorinated compounds, and organic phosphorus compounds obtained by sulfiding these, and various sulfided fats and oils are preferably used. As the antistatic agent, there are alkylphosphoric acid ester type, amine derivative, polyoxyethylene type, polyhydric alcohol type and the like, and the use of phosphoric acid diesters is most effective.

When each of these components is contained, the content of the rust preventive is 0.1 to 1.5 parts by weight and the antioxidant is 0.1 to 100 parts by weight of the component (A). ~ 1.
5 parts by weight, 1 to 7 parts by weight of the oiliness agent and the extreme pressure agent, and 0.01 to 0.5 parts by weight of the antistatic agent are preferably added.

The consistency of the composition of the present invention is 25 ° C.
Is preferably 200 to 300, particularly 24
It is preferably 0 to 260. In the present invention, there is no particular limitation on the method of blending each component, and for example, the composition of the present invention can be obtained by heating and melting each component with a known mixing device.

The feature of the lubricant according to the present invention is that the oil retaining performance is remarkably improved as compared with the conventional lubricants which are liquid at the environmental temperature of use, such as in the hot weather in summer and in heating in cold. This is a significant improvement in lubrication performance. In other words, (1) By keeping the grease-like state at the operating environment temperature, the point is less likely to stick to the sliding plate surface and flow out, and because the oil retaining performance is excellent, the lubricating life is long. Since it can be operated for more than 2 weeks with application and there is almost no outflow of lubricant due to rainfall, it is possible to maintain the lubricating function for a long period of time without the need to apply oil the next day as in the past. (2) The workability of replenishment is good because the viscosity is suitable for applying with a brush, and the cleaning agent (kerosene) required for cleaning is not required for cleaning. Can be wiped off and the working time can be greatly reduced. (3) The floor plate surface is prevented from rusting due to the remarkable improvement in oil retention performance, and surface hardening and drying due to dust adhesion are small. (4) Long-term maintenance of lubrication performance and improvement of workability for cleaning and refueling greatly contribute to saving of various materials, safety protection of security personnel, and labor saving.

[0013]

EXAMPLES The present invention will be described below with reference to examples and comparative examples, but these are examples and do not limit the present invention. The components of each Example and Comparative Example are shown in Table 1 together with the test items and others for each example.

[0014]

[Table 1] * 1 Paraffin type lubricating oil: viscosity at 100 ° C 4.
40 cSt, viscosity index 104 * 2 naphthenic lubricating oil: viscosity at 100 ° C 1
0.8 cSt, viscosity index 100 * 3 Scratch resistance: 40 × 60 × 1 mm of the sample was applied on a smooth iron plate of 60 × 80 × 1 mm, and a load of 2 kg was applied to the scraping iron plate to give 100 on the sample. The residual oil amount rate when reciprocating was measured.

* 4 Water resistance, immersion: 100 × 100 × 1
A sample of 60 × 80 × 1 mm was applied on a smooth iron plate of mm, immersed in water at 25 ° C., and the oil film state after 24 hours was observed.

* 5 Water resistance, shower spray: 100 × 1
The sample is 60 × 80 × 1m on a smooth iron plate of 00 × 1mm.
m, and shower spraying was performed from above for 50 cm with a water amount of 15 l / min for 60 minutes to observe the oil film state.

Evaluation ◎ No change ○ Oil film turbidity / shrinkage but no omission x Oil film omission * 6 Oil film condition under heating: Oil film condition under hot air or electric heating (about 70 ° C) I observed.

Evaluation ◎ Adhesion in the form of grease ○ Adhesion in the form of a dry oil △ Adhesion in the form of a slippery water with a small amount of adhesion * 7 Coating performance (winter): Observing the ease of coating at an ambient temperature of -20 ° C did. Evaluation ◎ Easy application without heating ○ Easy application with slight heating * 8 Ease of wiping dirt: Ease of wiping dirt after 5 days after continuous heating for 48 hours after application Was observed.

Evaluation ◎ The dirt can be easily wiped off with a rag cloth without sticking the dirt.

○ Although some dirt is fixed, it can be wiped off with a rag.

△ Although dirt is fixed, it can be wiped off with a rag if a force is applied.

* 9 Rust generation state: JIS K 224
6 (rust preventive oil) According to the method for measuring the degree of rust generation, the state of rust generation after continuous use for 3 months was observed.

* 10 Oil film state: under direct sunlight (about 60
The oil film state at (° C) was observed.

Evaluation ◎ Adhesion in the form of grease ○ Adhesion with a greasy oil △ Adhesion with a greasy oil with a small amount of adhering oil * 11 Coating performance (summer): The ease of coating was observed at an ambient temperature of 30 ° C. .. Evaluation ◎ Easy application.

* 12 Ease of wiping stains: 14 after application
After a day, the easiness of wiping off the dirt was observed.

Evaluation ◎ The dirt can be easily wiped off with a rag cloth without the dirt sticking.

○ Although the dirt is slightly fixed, it can be wiped off with a rag. △ The dirt is fixed, but you can wipe it off with a rag if you apply force.

[0028]

As is apparent from the above results, the lubricant for point sliding plates according to the present invention is an oil film at the ambient operating temperature as compared with the conventional lubricants for point sliding plates such as commercial products. By keeping the state in the form of grease, the replenishment interval of the lubricant was greatly improved, and it was possible to save labor and resources, and to significantly reduce the human risk of the worker.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location C10N 30:12 40:00 Z 8217-4H 40:02 50:10 (72) Inventor Kaichiro Yashima Miyagi 39, 5 Nishiki-cho, Shiogama-shi, Japan (72) Hideo Nishikawa, 5-3, Miyagino, Miyagino-ku, Sendai-shi, Miyagi Prefecture (72) Inventor, Susumu Kato 1-16, 14-1, Olympics, Miyagino-ku, Sendai-shi, Miyagi Prefecture (72) Ken Abe 13-5, 1-5 Kurio, Aoba-ku, Sendai-shi, Miyagi Prefecture

Claims (1)

[Claims] 1. (A) 100 parts by weight of a mineral oil-based and / or synthetic lubricating oil, (B) a paraffin wax 1 to 15 having a melting point of 45 to 80 ° C.
Parts by weight, and (C) 5 to 25 parts by weight of at least one wax selected from the group consisting of microcrystalline wax, synthetic wax and oxygen-containing wax and having a melting point of 80 to 125 ° C. Lubricant.