JP2008115237A - Corrosion resistant grease composition and corrosion resistant overhead wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a corrosion-resistant grease composition enhancing visibility while mainly ensuring corrosion-resistance of an overhead wire, and to provide a corrosion-resistant overhead electric wire enhancing visibility by coating a surface with the corrosion-resistant grease composition or filling it at the inside while coating the surface with it. <P>SOLUTION: In the corrosion-resistant grease composition, a luminescent substance is contained in the corrosion-resistant grease, and in the corrosion-resistant overhead electric wire, the corrosion-resistant grease composition is coated or filled to enhance the corrosion-resistance and the visibility. In the corrosion-resistant grease composition, a reflection substance can be further contained. The luminescent substance is a fluorescent substance or a light-accumulation substance. Further, a base oil preferably contains polybutene or a silicone oil as a main component. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is an anticorrosive grease composition that can improve the visibility of the overhead electric wire while maintaining excellent anticorrosion performance by mainly applying to and applying to the overhead electric wire. The present invention also relates to an anticorrosion overhead electric wire having a high anticorrosion property and visibility, which is applied to the surface of the composition or applied to the surface and filled therein.

  According to the Aviation Law, overhead cables installed at a height of 60 meters or more above the ground have a spherical shape with a diameter of 0.5 meters or more, and red or yellow markings and white markings are alternately 45 meters as daytime obstacle signs. It is stipulated that they should be installed at regular intervals.

  However, when a spherical sign is installed on an overhead electric wire, there is a high risk that the sign will be swung by receiving wind pressure and adversely affect the overhead electric wire. In addition, when the spherical marking object falls due to aging or the like, there is a risk of harming the structures, animals and plants directly under the overhead electric wires. In addition, if a spherical sign is installed on an overhead wire, the operation will be hindered when the suspension machine attached to the overhead wire is operated to perform maintenance and inspection work on the overhead wire. There is a concern that the flying machine cannot be used and the working efficiency is significantly reduced.

  For this reason, with the permission of the Minister of Land, Infrastructure, Transport and Tourism, each electric power company responds by alternately applying red and white coloring to a support such as a steel tower as an alternative to this sign. However, even if the support is colored in this way, it is difficult to see the support at night when there is no light from outside, such as in urban areas. Is often impossible.

  On the other hand, in order to protect the aerial cable crossing the sea and the aerial cable installed near the coastline from salt damage, it is applied to the surface of the aerial cable using anti-corrosion grease and filled inside. In some cases, anticorrosion treatment is performed (see Patent Documents 1 to 8). This anticorrosion grease is applied to the surface of the electric wire in advance when the electric wire is manufactured or after the electric wire is installed, and is filled inside.

In general, greases are roughly classified into lubricating greases and anti-corrosion greases according to their use. These components are common in that they are composed of components such as base oils, thickeners, and additives. Appearance is required, and heat resistance, water resistance, mechanical stability, etc. are required, while the latter has a bird-like appearance and is drooling, sticking, sticky, and dripping from the wire even at high temperatures. It differs from the lubricating grease in that it is required to not. For this reason, materials different from those used for lubricating grease are usually used for the base oil and thickener of the anticorrosive grease.
JP 2004-111100 A JP 2004-95338 A JP 2004-95337 A JP 2003-338221 A JP 2002-338981 A JP 2002-245864 A JP 2001-357724 A Japanese Patent Laid-Open No. 2001-89783

  In view of the circumstances described above, the present invention mainly applies an anticorrosion grease composition capable of enhancing the visibility while ensuring the anticorrosion property of an overhead electric wire, and the anticorrosion grease composition applied to the surface, or applied to the surface. In addition, an object of the present invention is to provide an anticorrosion overhead electric wire that is filled inside and has improved visibility.

  The anticorrosion grease composition of the present invention is characterized in that the anticorrosion grease contains a luminescent substance.

  The light-emitting substance is a substance that emits light chemically or physically by receiving an external stimulus such as visible light or ultraviolet light. This luminescent substance is a substance that always emits light, a substance that emits light only when it receives an external stimulus, or an afterglow that emits light continuously for a predetermined time after the external stimulus disappears. Any of those that do. Examples of such a luminescent substance include a fluorescent substance and a phosphorescent substance. These can be used alone or in combination. In the present invention, the luminescent material includes a composition containing the fluorescent material or the like as a component.

  The grease composition of the present invention preferably contains a reflective material together with the luminescent material. Here, the reflective substance refers to a substance that does not emit light itself but reflects light from the outside or light emitted from the luminescent substance coexisting in the grease composition of the present invention.

  The anticorrosion overhead electric wire of the present invention is characterized in that the anticorrosion grease composition is applied to the surface, or applied to the surface and filled therein.

  According to the present invention, since at least the luminescent substance is contained in the anticorrosion grease, the visibility can be improved even at night while maintaining the anticorrosion property of the anticorrosion grease. Moreover, according to this invention, the corrosion-proof overhead electric wire excellent in corrosion resistance and visibility can be obtained.

  The form of the luminescent substance such as a fluorescent substance or a phosphorescent substance in the present invention may be either liquid or solid. Here, examples of the liquid luminescent material include suspensions of the fluorescent material and the phosphorescent material and known luminescent coating compositions. Examples of the solid light-emitting substance include the pigments and dyes of the fluorescent substances and phosphorescent substances. Among these, solid ones are preferable, and ones exhibiting a granular shape are more preferable. When using a granular luminescent material, the particle size or particle size distribution is not particularly limited.

  Examples of the fluorescent substance include condensed cyclic hydrocarbons such as pyrene, perylene, anthracene, naphthacene, chrysene, triphenylene, pentaphen, 1,2-benzpyrene, hexaphene, trinaphthylene, coronene, tetracene, dibenzcoronene, and rubrene; p Diphenylpolyenes such as diphenylbenzene (p-terphenyl), 1,6-diphenyl-1,3,5, -hexatriene and 1,8-diphenyl-1,3,5,7-octatetraene; Polycyclic hydrocarbons such as p-quinodimethane, asy-phenyl-o-tolyl-p-quinodimethane and p-distyrylbenzene; benzene derivatives represented by hydroquinone dimethyl ether; polycyclic compounds such as benzidine and stilbene derivatives Naphthylamine and its derivatives Condensed cyclic compounds; thiazole derivatives, pyridine derivatives, benzoxazole derivatives, flavone derivatives, coumarin derivatives, quinoline derivatives, heterocyclic derivatives, such as acridine derivatives. These can be appropriately selected and used in consideration of the respective fluorescent colors, the use environment of the composition of the present invention, the visibility in the use environment, and the like, and can be used in combination of two or more.

  In addition, active substances such as aluminum, calcium, barium, magnesium, zinc, cadmium, strontium and other oxides and sulfides, heavy metals such as bismuth, rare earth elements such as europium and dysprosium, and oxides are active as phosphorescent substances. Examples of the additives include calcium sulfide / bismuth, calcium sulfide / strontium / bismuth, zinc sulfide / copper, zinc sulfide / cadmium / copper phosphorescent material, and strontium aluminate phosphorescent material. These can be appropriately selected and used in consideration of the respective fluorescent colors and the use environment of the composition of the present invention, and can be used in combination of two or more.

  If the content of the luminescent substance relative to the anticorrosive grease is too small, the visibility of the anticorrosive grease composition of the present invention obtained at night will be lowered. It is preferable to increase the physical properties such as adhesion) and sag at high temperatures to such an extent that they are not significantly inferior to those of the anticorrosive grease component used in the composition. Specifically, the content cannot be specified in general depending on the type of anticorrosion grease and luminescent material used, suitability, and desired visibility, but the content of luminescent material is usually anticorrosive. The amount is preferably about 0.5 to 50 parts by weight with respect to 100 parts by weight of grease. Below this range, it becomes difficult to visually recognize the anticorrosive grease composition of the present invention at night. When exceeding the above range, physical properties such as adhesion of the anticorrosive grease composition of the present invention to an object to be coated are described. May get worse. When deterioration of physical properties can be tolerated to some extent, the anticorrosive grease can contain a luminescent substance beyond the above range.

  Furthermore, in the anticorrosive grease composition of the present invention, it is preferable that a reflective material is contained together with the luminescent material. Specific examples of the reflective material include silica, glass powder, quartz powder, and acrylic resin powder. These are not particularly limited in terms of their particle size or particle size distribution as long as they are powdery. These can also be used alone or in combination of two or more.

  The content of the reflective material can be added in such a large amount as not to impair the visibility of the grease composition of the present invention due to the light emission of the luminescent material. Specifically, it cannot be specified in general depending on the type, properties and content of the anti-corrosion grease and luminescent material used, the type and properties of the reflective material used, and the desired degree of visibility. The amount is preferably about 0.5 to 20 parts by weight with respect to 100 parts by weight of the anticorrosive grease.

  The anticorrosive grease used in the anticorrosive grease composition of the present invention is usually composed of a base oil, a thickener and various additives.

  Each of the base oil, thickener and additive used in the anticorrosion grease may be known per se. That is, the base oil is generally used to form a water-impervious film on the metal surface in order to prevent contact of a substance such as corrosive gas in the atmosphere with the metal surface. Examples of the base oil include paraffinic, naphthenic, and aromatic mineral oils, polybutene, silicone oil, fluorine-based oil, diester oil, and phenyl ether oil. These can be used alone or in combination of two or more. Of these, the main component is preferably silicone oil or polybutene, or a mixture of both, and more preferably polybutene. Here, the term “based on the main component” means that the silicone oil or polybutene, or a mixture thereof is the total amount of the base oil, and the majority of the base oil, and the balance is the other base oil components exemplified above. Used to mean both.

  Silicone oil can be suitably used because it has the advantages of low water absorption and excellent repellency and electrical insulation. Examples of such silicone oil include dimethylsiloxane and methylphenylsiloxane. These silicone oils may be used alone or in combination of two or more.

  Polybutene is a liquid low polymer obtained by polymerization of butenes such as isobutylene and 1-butene, and since it consists of a hydrocarbon main chain, it has excellent electrical insulation and chemical stability, and is also resistant to heat and light. It is also stable and excellent in water resistance, water repellency, aging resistance and the like. In addition, since impurities, waxes and volatile oils are extremely low, it has excellent heat resistance and exhibits a low pour point. Therefore, it is required when anticorrosion grease containing this as a base oil component is applied to anticorrosion overhead wires. Excellent cold resistance. Moreover, it is rich in adhesiveness and adhesiveness and can suppress dripping from the electric wire even at high temperatures.

  Such polybuden can be appropriately selected from commercially available products and used, for example, Nippon Petrochemical's Nisseki Polybuden series LV-7, LV-50, LV-100, HV-15, HV-35, HV-50, HV-100, HV-300 (all trade names), etc. Idemitsu Petrochemical's Idemitsu Polybden Series 15H, 300H, 2000H, 15R, 35R, 100R, 300R etc. (all trade names), Nippon Oil & Fats Nissan Polybden Series 015N, 3N, 5N, 10N, 30N, 200N, etc. (all are trade names). This polybutene may be either hydrogenated or non-hydrogenated.

  The thickener is used to increase the viscosity of the base oil and retain the base oil in the grease. Examples of the thickener include metal soaps such as lithium soap, calcium soap, aluminum soap and lithium / aluminum composite soap, and urea compounds such as silica gel, bentonite and urea.

  Additives include phenolic, aromatic amine, phosphate ester and other antioxidants (also referred to as deterioration inhibitors or anti-aging agents); metal sulfonates, amines and other rust inhibitors; In addition to corrosion inhibitors such as triazole; extreme pressure agents such as sulfurized fats and oils and chlorinated paraffins, known ones such as antifoaming agents, structural stabilizers, thickeners and the like can be mentioned. Moreover, a fibrous additive is also contained in this additive. Specific examples of the fiber additive include glass fiber and rock wool. These additives can be appropriately selected as required and can be contained in the anticorrosion grease.

  This anticorrosion grease can be adjusted by mixing the above-mentioned components by a known method. In the preparation, all of the above components may be mixed and adjusted at once, or a grease that can be used for lubrication is prepared in advance by mixing mineral oil or metal soap. In addition, a base oil such as polybutene or a fiber additive may be mixed and adjusted. The prepared anti-corrosion grease preferably has a consistency (in accordance with JIS K 2220) indicating the hardness of about 200 to 340 as a guide.

  In the present invention, a known anticorrosion grease can be used as it is.

  The anticorrosive grease composition of the present invention can be obtained by a known preparation method by adding a luminescent substance to a pre-prepared anticorrosive grease or a known (commercially available) anticorrosive grease, or by adding this in combination with a reflective substance. . Further, when preparing the anticorrosion grease, the anticorrosion grease composition of the present invention may be prepared by adding a luminescent substance to each component of the anticorrosion grease or adding this and a reflective substance. When adding a luminescent substance or the like to the anticorrosion grease, if necessary, one or more of the above-mentioned various additives may be appropriately selected and added.

  The anti-corrosion grease composition of the present invention thus obtained has a bird-like shape like the known anti-corrosion grease, has good coatability (adhesion), and excellent dripping at high temperatures. Become.

  The anticorrosion overhead electric wire of the present invention is obtained by applying the anticorrosion grease composition of the present invention having the above-described configuration to a metal portion of the electric wire. For example, in the case of an ACSR electric wire in which a plurality of aluminum wires or alloy wires thereof are twisted around a center wire made of a single wire or a stranded wire, the anticorrosive grease composition of the present invention is applied to the surface and filled inside. The method for coating or filling is not particularly limited, and various known methods can be employed. For example, an operator may apply to the surface of the electric wire using an appropriate tool, fill the inside of the electric wire, or apply or fill the electric wire using a known application device.

  As such a coating apparatus, for example, a coating apparatus described in JP-A-52-65876 can be suitably used. This applicator is equipped with a plurality of channel supports each equipped with a moving wire holding roller at both ends inside a split cylinder having a split die for inserting an electric wire at the entrance and exit. The grease is applied to the moving electric wire in a state where the arrangement mounting and the moving electric wire and the outlet die are always held concentrically.

  In the case of an overhead electric wire, the coating thickness is usually 4 to 5 mm. There is no restriction | limiting in particular also about the time of application | coating, It can apply | coat or fill at the time of manufacture of an electric wire, You may apply | coat etc. after constructing an electric wire.

[Examples 1 to 5]
Using anticorrosion grease mainly composed of polybutene as the base oil, the light emitting substance and the reflecting substance shown in Table 1 were added in the amounts shown in the same table, and prepared by known methods to obtain five types of anticorrosion grease compositions.

[Example 6]
Instead of the anticorrosive grease used in Examples 1 to 5, the anticorrosive grease composition was the same as in Example 5 except that an anticorrosive grease mainly composed of silicone oil was used as the base oil. Obtained (see Table 1).

[Method of manufacturing anti-corrosion overhead wire]
A plurality of aluminum power lines (200 mm ² stranded wires) used as overhead power lines were cut to a length of 1 m. Each of the cut transmission lines was filled with the anticorrosive grease composition between the strands and applied to the surface of the stranded wire to produce an anticorrosion overhead electric wire.

[Evaluation of anticorrosion overhead wire]
The following evaluation was performed about the anti-corrosion overhead electric wire obtained by the said manufacturing method.
(1) Application | coating property The injection | pouring property, adhesiveness, and dripping property at the time of apply | coating or filling the obtained grease composition to the transmission line after the said cutting were evaluated by the following references | standards.
Evaluation criteria:
○: Possibilities of injection were good and no peeling off from the electric wire was observed. ×: Adhesion of the grease composition to the electric wire was weak and peeling off was observed.

(2) Visibility In the daytime, the anticorrosive overhead wire was placed in sunlight, observed at night, and evaluated according to the following criteria.
Evaluation criteria:
◎: Recognizable well ○: Recognizable ×: Unrecognizable at all

(3) Dripping property at high temperature The obtained anticorrosion overhead electric wire was allowed to stand at 150 ° C. for 100 hours and evaluated according to the following evaluation criteria.
Evaluation criteria:
○: No dripping of grease was observed Δ: The amount of dripping with respect to the coating amount was less than 3% ×: The amount of dripping with respect to the coating amount was 3% or more

(4) Corrosion resistance A sample was prepared by applying the obtained grease to a thickness of 0.1 mm on the surface of an aluminum plate having a thickness of 1 mm, and this was placed in a desiccator containing hydrochloric acid having a concentration of 6 mol / l for 30 days. I left it alone. Thereafter, the sample was taken out from the desiccator, and the surface roughness of the aluminum plate from which the surface grease was removed was measured and evaluated according to the following criteria.
Evaluation criteria:
○: Average surface roughness was 2 μm or less ×: Average surface roughness was more than 2 μm

  Table 1 shows the evaluation results of the evaluation items for the anticorrosive grease compositions obtained in Examples 1 to 6.

  From Table 1, the anticorrosive grease composition of the present invention contains a luminescent substance or a luminescent substance and a reflective substance in the anticorrosive grease, so that the visibility is improved, and the content of the luminescent substance is particularly high. In 3-6, the visibility which was excellent compared with Example 1 and 2 with little content is shown. In addition, even with the addition of a luminescent material, the coatability, the drooping property at high temperatures, and the anticorrosion properties are not deteriorated.

  As described above, since the anticorrosive grease composition of the present invention contains a light emitting substance and, if desired, a reflective substance, visibility can be improved while maintaining the anticorrosion performance. Moreover, by applying or filling the anticorrosion grease composition of the present invention to an overhead electric wire, it is possible to obtain an anticorrosion overhead electric wire that is excellent in anticorrosive performance and visible at night.

Claims (7)

  An anti-corrosion grease composition comprising a luminescent substance in an anti-corrosion grease.   The anticorrosive grease composition according to claim 1, wherein the luminescent material is a fluorescent material and / or a phosphorescent material.   The anticorrosive grease composition according to claim 1 or 2, wherein the blending amount of the luminescent material is 0.5 to 50 parts by weight with respect to 100 parts by weight of the anticorrosive grease.   The anticorrosion grease composition according to any one of claims 1 to 3, further comprising a reflective substance.   The anti-corrosion grease composition according to claim 4, wherein the amount of the reflective material is 0.5 to 20 parts by weight with respect to 100 parts by weight of the anti-corrosion grease.   The anticorrosion grease composition according to claim 1, wherein the anticorrosion grease contains polybuden or silicone oil as a main component of the base oil.   An anticorrosive overhead electric wire, wherein the anticorrosive grease composition according to any one of claims 1 to 6 is applied to the surface, or applied to the surface and filled therein.