JP2018065910A - Lubricant composition, grease composition, diluted solution for lubricant, and sliding member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lubricant composition and the like capable of maintaining noise deadening property and lubricity even when used for a long time.SOLUTION: The lubricant composition contains 0.1 pt.wt. or more of a vinylidene fluoride-hexafluoropropylene copolymer having 100 Pa s or more of an absolute viscosity at 40°C based on 100 pts.wt. of a total composition.SELECTED DRAWING: None

Description

  The present invention relates to a lubricant composition that is applied between solids to achieve a relatively smooth operation between the solids and is suitable for preventing sound generated by the relative movement between the solids.

  The lubricant is required to have various functions in addition to the lubricity that is the original purpose. For example, heat resistance, low temperature resistance, durability, waterproofness, rust prevention, etc. are mentioned. One of the functions is to prevent rubbing and hitting sounds generated by relative movement between solids. There are cases where sound leads to comfort, but in general, it is often treated as undesirable noise and noise, and there is more demand to suppress the generation of sound due to sliding.

  In particular, in recent years, automobile noise reduction technology such as engine noise reduction and noise reduction technology typified by hybrid cars has progressed, and there are many opportunities to reduce or prevent unwanted rubbing and hitting sounds. It has become.

  In this regard, countermeasures with lubricants are increasingly desired. Among them, when applied to a resin material, a method of adding the resin inside is widely known. However, in this method, a sufficient lubricant for precipitation on the surface has to be added, and the compatibility with the resin and the amount added must be taken into consideration. Also, depending on the amount added, deterioration of the resin was inevitable. In addition, the surface is often depleted depending on the time and environment, and long-time use is difficult. Moreover, since it could not be applied to materials such as metal, the range of use was limited.

  For this reason, the solution by the application | coating system is also examined with respect to this request | requirement. As one of them, a lubricating grease using a silicone oil (high viscosity oil) having excellent temperature characteristics as a base oil has been proposed (Patent Document 1). Lubricating grease using high-viscosity oil can form a thick lubricating film at the initial stage on the solid surface due to its viscosity. However, if the operation is continued for a long time, the lubricating grease moves and accumulates at locations other than the lubrication surface, and the oil film at the lubrication location becomes thin, so that the lubrication effect is reduced and the silencing effect is also reduced. Although a decrease in viscosity at a high temperature region is improved as compared with mineral oil, at present, a material that can cope with a wider temperature change and has a smaller viscosity change with respect to the temperature change is desired.

  In addition, a grease composition has been proposed in which a synthetic hydrocarbon is used as a base oil and a silencing effect is provided by adding a solid powder such as a metal carbonate (Patent Document 2). The grease composition to which this solid powder is added, like the lubricating grease using the high-viscosity oil of Patent Document 1, when the operation is continued, the solid powder moves and accumulates along with the lubricating grease on a portion other than the lubricating surface, and similarly the noise reduction effect. There was a concern about the decline. In addition, in the case of an environment at a high temperature, a decrease in viscosity is unavoidable and the silencing effect is further reduced.

JP2010-248442 JP2012-1680

  An object of the present invention is to provide a lubricant composition or the like that can maintain the silencing properties even after long-term use, that is, has excellent silencing durability.

  It is a further object of the present invention to provide a lubricant composition that is particularly excellent in noise reduction of resin parts and metal parts, such as a lubricant composition that is excellent in workability such as coating properties and drying properties. .

  Another object of the present invention is to provide a lubricating film formed from the lubricant composition and the like, and a sliding member having the lubricating film.

  As a result of intensive studies to solve the above problems, the present inventors have found that an excellent silencing effect can be obtained by adding a vinylidene fluoride-hexafluoropropylene copolymer to a lubricant composition. The headline and the present invention were completed.

  That is, the present invention provides the following lubricant composition and the like.

  The present invention contains 0.1 part by weight or more of vinylidene fluoride-hexafluoropropylene copolymer having an absolute viscosity at 40 ° C. of 100 Pa · s or more when the weight of the entire composition is 100 parts by weight. It is a lubricant composition characterized by these.

  The present invention comprises a vinylidene fluoride-hexafluoropropylene copolymer having an absolute viscosity at 40 ° C. of 100 Pa · s or more and a lubricating oil, and the vinylidene fluoride-hexafluoropropylene copolymer and the lubricating oil. The vinylidene fluoride-hexafluoropropylene copolymer is in the range of 0.1 to 90 parts by weight and the lubricating oil is in the range of 10 to 99.9 parts by weight with respect to a total weight of 100 parts by weight. It is a lubricant composition.

  In relation to the lubricant composition, the lubricating oil comprises one or more selected from fluorine oil, silicone oil, synthetic hydrocarbon oil, ester oil, and mineral oil. It is characterized by.

  The present invention comprises a vinylidene fluoride-hexafluoropropylene copolymer having an absolute viscosity at 40 ° C. of 100 Pa · s or more, a lubricating oil, and a thickener, and the vinylidene fluoride-hexafluoropropylene copolymer The vinylidene fluoride-hexafluoropropylene copolymer is in the range of 0.1 to 90 parts by weight and the lubricant is in the range of 10 to 99.9 parts by weight with respect to 100 parts by weight of the total weight of the polymer and the lubricant. It is a grease composition characterized by being.

  In relation to the grease composition, the grease composed of the lubricating oil and the thickener includes one or more selected from fluorine-based grease, silicone grease, and hydrocarbon-based grease. It is characterized by.

  The present invention provides a lubricant composition according to any one of the above and / or the grease composition according to any one of the above, and a diluent containing one or more selected from the group of the following hydrocarbon solvents: A diluted lubricant solution characterized by comprising:

  Selection group: acetone, methanol, ethanol, normal propyl alcohol, isopropyl alcohol, petroleum benzine, petroleum ether, ligroin, methyl acetate, ethyl acetate, butyl acetate, isobutyl acetate, toluene, xylene, benzene, tetrahydrofuran, tetrachloroethylene, dichloroethane, 1, 1,1-trichloroethane, ethylene glycol monomethyl ether, methyl ethyl ketone, diethyl ether, dibutyl ether

  The present invention provides a lubricant composition according to any one of the above and / or the grease composition according to any one of the above, and a diluent containing one or more selected from the group of the following fluorinated solvents: It is a lubricant diluted solution characterized by having.

  Selection group: perfluorocarbon, hydrofluorocarbon, hydrofluoroether, hadrofluoroolefin, perfluoropolyether

  The present invention is a sliding member characterized by having a lubricating film formed of any of the above-described lubricant compositions.

  The present invention is a sliding member characterized by having a lubricious coating film formed of any of the above grease compositions.

  The present invention is a sliding member characterized by having a lubricious coating film formed from the lubricating oil diluted solution described above.

  Since this vinylidene fluoride-hexafluoropropylene copolymer is a liquid fluororubber having both a high viscosity and an adhesive force that are stable from a low temperature to a high temperature region, it can maintain an excellent adhesive effect in each temperature range. In particular, a further excellent silencing effect can be expected by combining with a fluorine-based lubricating oil having a large viscosity index.

  In addition, the vinylidene fluoride-hexafluoropropylene copolymer used in the present invention has a characteristic that it can be fixed to the surface even in a small amount when mixed with various lubricants and greases, thereby exhibiting a silencing effect. This can be used while the ratio of the lubricant is relatively high, and the original functions of the lubricant (friction reduction, wear reduction, etc.) can be exhibited. In addition, since it can be added in a small amount, it can be easily and widely applied to various lubricants and various greases with different solubilities, with little concern for compatibility with the lubricant / diluent. Is possible.

  Furthermore, even if this copolymer is low in compatibility with the lubricant, it provides a sufficient silencing effect. Specifically, it is considered that even when the copolymer is applied in the form of a mixture without completely dissolving, the lubricant can be retained around or inside the adhesive component, so that the effect is high.

  The lubricant composition of the present invention can be suitably used because it can be applied to any surface in an appropriate state.

  The lubricant composition of the present invention comprises a vinylidene fluoride-hexafluoropropylene copolymer (hereinafter referred to as a copolymer) having an absolute viscosity at 40 ° C. of 100 Pa · s or more when the whole is 100 parts by weight. Contains 0.1 parts by weight or more.

  The lubricant composition of the present invention desirably contains a lubricant and a copolymer, and the content of the lubricant with respect to 100 parts by weight is preferably 10 to 99.9 parts by weight, more preferably 50. It is -99 weight part, Most preferably, it is 60-98 weight part. The copolymer is contained in an amount of 0.1 part by weight or more, more preferably 1 to 50 parts by weight, and most preferably 2 to 40 parts by weight.

  The lubricating oil used in the lubricant composition of the present invention is not particularly limited, and for example, fluorine oil x, synthetic hydrocarbon oil, ester oil, mineral oil and the like can be used. Among them, fluorine oils, synthetic hydrocarbon oils (polyalphaolefin oils), fatty acid ester oils (for example, ester oils of fatty acids containing polybasic acids with aliphatic and polyhydric alcohols), carbonate oils, alkyl diphenyl ethers It is preferably at least one selected from the group consisting of oil, alkylbenzene oil, and silicone oil. From the viewpoint of resin resistance, fluorine-based oils and polyalphaolefin oils are preferred.

As a specific example of the lubricating oil, polyalphaolefin oil is a polymer containing 1-decene or 1-decene and unsaturated hydrocarbon as monomers, and has a kinematic viscosity at 40 ° C. of ² to 1000 [mm ² / s]. Ranges are preferred.

  Fluorinated oils are commercially available perfluoropolyethers, and registered trademarks include Krytox, FOMBLIN, and DEMNUM.

  Similar to the lubricant composition of the present invention, the grease composition of the present invention contains a copolymer and grease. As a type of grease, fluorine grease, silicone grease, hydrocarbon grease, etc. can be widely used. This grease includes a lubricating oil and a thickener. At this time, when the total amount of the lubricating oil and the copolymer contained in the grease is 100 parts by weight, the content of the lubricating oil is preferably 10 to 99.9 parts by weight, more preferably 50 to 99 parts by weight. Preferably it is 60-98 weight part. The copolymer is contained in an amount of 0.1 part by weight or more, more preferably 1 to 50 parts by weight, most preferably 2 to 40 parts by weight.

  In the present invention, the lubricant composition and the grease composition may be used in combination depending on the use environment and application. By using in combination, it becomes possible to simultaneously adapt to any of a plurality of uses (for example, solid use and liquid use) that each is good at. The combination ratio can be changed according to the application, and the range of 5:95 to 50:50 is favorable for the lubricant composition: grease composition.

  The lubricant composition and grease composition of the present invention can be used after appropriately diluted with an organic solvent. In the present invention, this is defined as a diluted lubricant solution. As the organic solvent, general solvents can be widely used, and hydrocarbon solvents and fluorine solvents are particularly desirable.

  Hydrocarbon solvents include acetone, methanol, ethanol, normal propyl alcohol, isopropyl alcohol, petroleum benzine, petroleum ether, ligroin, methyl acetate, ethyl acetate, butyl acetate, isobutyl acetate, toluene, xylene, benzene, tetrahydrofuran, tetrachloroethylene , Dichloroethane, 1,1,1-trichloroethane, ethylene glycol monomethyl ether, methyl ethyl ketone, diethyl ether, dibutyl ether and the like. It is possible to dilute with one or a mixture of two or more of these solvents.

  Examples of the fluorine-based solvent include perfluorocarbon, hydrofluorocarbon, hydrofluoroether, hadrofluoroolefin, and perfluoropolyether. It is possible to dilute with one or a mixture of two or more of these solvents.

  The above hydrocarbon-based and fluorine-based solvents may be mixed and used at an arbitrary ratio depending on the application and coating method. Moreover, mixing with water-soluble solvents, such as alcohol and glycol, is also possible.

  The lubricant composition and the grease composition of the present invention can also contain a known solid lubricant. As the solid lubricant, various types such as boron nitride, molybdenum disulfide, graphite, fluorine-based polymer, fluorine-containing copolymer and the like can be used. These can be used alone or in combination of two or more. The average particle size of these solid lubricants is suitably from 0.1 to 10 μm.

  In addition to the lubricant composition and the grease composition of the present invention, an antioxidant, a rust inhibitor, an oily agent, an extreme pressure agent, a surfactant, and the like can be added.

  The lubricant composition and grease composition of the present invention can be produced by a usual method. For example, a method of adding a copolymer to lubricating oil or grease and kneading and dispersing as required can be mentioned. A known roll mill, colloid mill, ball mill, dyno mill or the like can be used for kneading and dispersing.

  The lubricant composition or grease composition of the present invention, or a diluted lubricant solution obtained by diluting them, is a lubricant containing a copolymer and a lubricant oil or grease after the volatile components disappear after application in the application member. A protective coating is formed.

  The sliding member to which the lubricant composition, the grease composition, or the lubricating oil diluted solution of the present invention is applied is not particularly limited as long as noise reduction is required. For example, the present invention is applied to various members that require lubrication and noise reduction, such as slide sliding parts, gears, bearings, and electrical contacts of precision equipment. The lubricant composition, grease composition, or diluted lubricant solution of the present invention is particularly suitable for resin parts such as automobiles, bicycles, trains and other mobile parts, audio / video equipment, information equipment, resin parts and metal parts, or It is preferably applied to a sliding part between metal parts, and particularly preferably applied to a sliding part between resin parts.

  Examples of the resin constituting the sliding member include polyethylene, polypropylene, polyvinyl chloride, polystyrene, acrylonitrile butadiene styrene (ABS) resin, AS resin, methacrylic resin, polyvinyl alcohol, polyvinylidene chloride, polyethylene terephthalate, polyamide, polyacetal. (POM), polycarbonate (PC), modified polyphenylene ether, polybutylene terephthalate, GF reinforced polyethylene terephthalate, ultrahigh molecular weight polyethylene, polysulfone, polyethersulfone, polyphenylene sulfide, polyarylate, polyamideimide, polyetherimide, polyetherether Ketone, polyimide, liquid crystalline polyester, polytetrafluoroethylene, polyamino bismaleimide, poly Scan amide triazole, ABS / PC polymer alloy, and the like.

  The lubricant composition, grease composition, or lubricating oil diluted solution of the present invention can form a lubricating film by a general method. Specifically, a method of applying a lubricant composition, a grease composition, or a diluted lubricant solution to a sliding member by brush, brush, or spray, a lubricant composition, a grease composition, or a lubricant oil The lubricating film can be formed on the sliding member and its part by a method of immersing the sliding member in the diluted solution. The thickness of the coating is suitably 0.1 to 500 μm.

  Hereinafter, examples and comparative examples of the present invention will be described in more detail.

<Examples and Comparative Examples>
Each lubricant composition was prepared with the composition ratio (unit: wt%) described in Table 1 below. As a preparation method, a predetermined amount of vinylidene fluoride-hexafluoropropylene copolymer and each lubricating oil or grease were mixed. In the case of grease, the lubricating oil and thickener were mixed with a three-roll mill, and the copolymer was further mixed. In some samples, the lubricant was sufficiently stirred and dispersed with a predetermined amount of solvent, and this diluted lubricant solution was used as a sample.

<Example 0-1 to Example 0-7>
As fluorolubricating oil, perfluoropolyether (trade name: PFPE oil demnum S-65 (registered trademark)) is used, and samples with different ratios to vinylidene fluoride-hexafluoropropylene copolymer are prepared as samples. did. In addition, with respect to the sample of Example 0-3, 400 parts by weight of hydrofluoroether was added to 100 parts by weight of the total of perfluoroether and vinylidene fluoride-hexafluoropropylene copolymer, and the homogenizer treatment was performed. Made a 20% diluted solution. This sample was determined as Example 0-7. Examples 0-1 to 0-7 were intended to confirm the effect of mixing with a fluorine lubricating oil and the effect of changing the mixing ratio of the lubricating oil and the copolymer.

<Example 1-1 to Example 1-7>
By mixing 75 parts by weight of the same perfluoropolyether used in Example 0-1 and 25 parts by weight of fluororesin having an average primary particle size of 1.1 μm, and passing through a three-roll mill once, homogeneous fluorine grease did. This fluorine-based grease had an immiscibility of 305 at 25 ° C. Using this fluorine grease, samples having different mixing ratios of perfluoropolyether and vinylidene fluoride-hexafluoropropylene copolymer in the fluorine grease were prepared as samples. Similarly to Example 0-7, with respect to the sample of Example 1-3, 400 parts by weight of hydrofluoroether was added to 100 parts by weight of the total amount of fluorine grease and vinylidene fluoride-hexafluoropropylene copolymer, and the homogenizer treatment was performed. And a diluted solution with a non-volatile component of 20% was prepared. This diluted lubricant solution was designated as Example 1-7. The purpose of this example was to confirm the effect of mixing with fluorine grease and the effect of changing the mixing ratio of the lubricating oil and copolymer contained in the grease.

<Example 2-1>
A methylphenyl silicone oil having a kinematic viscosity of 100 [mm ² / s] at 25 ° C. is used as a silicone lubricant, and mixed at a ratio of 90 parts by weight of methylphenyl silicone oil and 10 parts by weight of vinylidene fluoride-hexafluoropropylene copolymer. A sample was prepared. The purpose of this example was to confirm the effect of mixing a silicone-based lubricant and a copolymer.

<Example 2-2>
Polyalphaolefin oil (PAO6) having a kinematic viscosity of 31 [mm ² / s] at 40 ° C. is used as a hydrocarbon oil lubricant, 90 parts by weight of polyalphaolefin oil, and 10 parts by weight of vinylidene fluoride-hexafluoropropylene copolymer Were mixed as a sample and prepared as a sample. The purpose of this example was to confirm the effect of mixing a hydrocarbon oil lubricant and a copolymer.

<Example 2-3>
A polyoxypropylene monobutyl ether having a kinematic viscosity of 40 [° C. 65 [mm ² / s] is used as a glycol-based lubricating oil, and a ratio of 90 parts by weight of polyoxypropylene monobutyl ether and 10 parts by weight of vinylidene fluoride-hexafluoropropylene copolymer And prepared as a sample. The purpose of this example was to confirm the effect of mixing a glycol-based lubricant and a copolymer.

<Example 2-4>
Pentaerythritol fatty acid ester having a kinematic viscosity of 34 [mm ² / s], C (CH ₂ OCOR) ₄ R = C ₇ H ₁₅ and C ₉ H ₁₉ is used as an ester-based lubricating oil, and 90 weight of pentaerythritol fatty acid ester Parts and a vinylidene fluoride-hexafluoropropylene copolymer at a ratio of 10 parts by weight were prepared as samples. The purpose of this example was to confirm the effect of mixing an ester lubricant and a copolymer.

<Example 3-1>
A silicone oil grease comprising 15 parts by weight of lithium hydroxystearate and 85 parts by weight of methylphenyl silicone oil used in Example 2-1 was prepared. The grease had an immiscibility of 310 at 25 ° C. A sample was prepared by mixing 10 parts by weight of vinylidene fluoride-hexafluoropropylene copolymer with 90 parts by weight of methylphenyl silicone oil in the silicone oil grease. The purpose of this example was to confirm the effect of mixing silicone oil grease and copolymer.

<Example 3-2>
A hydrocarbon oil grease comprising 12 parts by weight of lithium hydroxystearate and 88 parts by weight of the polyalphaolefin oil used in Example 2-2 was prepared. This grease had an immiscibility of 300 at 25 ° C. A mixture of 10 parts by weight of vinylidene fluoride-hexafluoropropylene copolymer was mixed with 90 parts by weight of the polyalphaolefin oil in the hydrocarbon oil grease, and prepared as a sample. The purpose of this example was to confirm the effect of mixing a hydrocarbon oil grease and a copolymer.

<Example 3-3>
A mineral oil grease consisting of 10 parts by weight of lithium hydroxystearate and 90 parts by weight of paraffinic mineral oil having a kinematic viscosity at 40 ° C. of 65 [mm ² / s] was prepared. This grease had an immiscibility of 285 at 25 ° C. Samples were prepared by mixing 10 parts by weight of vinylidene fluoride-hexafluoropropylene copolymer with 90 parts by weight of paraffinic mineral oil in the mineral oil grease. The purpose of this example was to confirm the effect of mixing mineral oil grease and copolymer.

<Example 3-4>
An ester oil grease consisting of 10 parts by weight of lithium hydroxystearate and 90 parts by weight of the ester oil used in Example 2-4 was prepared. This grease had an immiscibility of 290 at 25 ° C. A sample was prepared by mixing 10 parts by weight of vinylidene fluoride-hexafluoropropylene copolymer with 90 parts by weight of ester oil in the ester oil grease. The purpose of this example was to confirm the effect of mixing the ester oil grease and the copolymer.

<Example 4-1>
45 parts by weight of fluorine lubricating oil (perfluoropolyether (trade name: PFPE oil demnum S-65 (registered trademark)) used in Example 0-1 and 60 parts by weight of fluorine grease used in Example 1-1 (45 parts by weight in terms of perfluoropolyether in fluorine grease), 10 parts by weight of vinylidene fluoride-hexafluoropropylene copolymer, these mixtures were sufficiently stirred and prepared as a sample. The purpose of this was to confirm the effect of subsequent mixing with fluorine lubricating oil and fluorine grease.

<Comparative Example 0-1>
The same perfluoropolyether as in Example 0-1 was used as a fluorine lubricant as it was and used as a sample. The purpose of this comparative example was to confirm the effect of only the fluorine lubricant that does not contain the copolymer of the present invention.

<Comparative Example 0-2>
As the fluorine grease, the same fluorine grease as in Example 1-1 was used as it was and used as a sample. The purpose of this comparative example was to confirm the effect in the case of only the fluorine grease not containing the copolymer of the present invention.

<Comparative Example 0-3 to Comparative Example 0-5>
90 parts by weight of the same perfluoropolyether as in Example 0-1 as a fluorine lubricant, titanium oxide powder with an average particle size of 0.3 μm, carbon powder with an average primary particle size of 40 nm, and an average primary particle size of 1. Each sample was mixed with 10 parts by weight of 1 μm fluororesin powder. The purpose of this comparative example was to confirm the effect when an inorganic / organic filler other than the copolymer of the present invention was contained.

<Evaluation Method 1 (Friction Change)>
The silencing effect of the lubricant composition and the grease composition prepared as described above was evaluated by the following method.
(1) A lubricant composition or a grease composition was applied by a squeegee method or a brush so that an appropriate hydrating film was formed on each test piece (sliding member) made of ABS resin. What the organic solvent contained was dried at room temperature for 10 minutes. In the case of the lubricant composition, a test piece was obtained by adjusting the coating thickness to be about several μm, and in the case of the grease composition, the coating thickness was adjusted to be about 20 μm.
(2) The friction coefficient was measured with respect to the application surface of this test piece using a HEIDON surface property measuring instrument (manufactured by Shinto Kagaku Co., Ltd.). The conditions were a load of 500 g, a speed of 2000 mm / min, 1000 reciprocations and a moving width of 20 mm, and the sphere was also made of ABS resin. The friction coefficient after 1000 times was defined as “initial friction”.
(3) Next, the lubricant composition or the grease composition was carefully scraped off from the application area of the test piece with a resin piece, and lightly wiped with a paper waste. As a result, the lubricant composition or the grease composition was created in a simulated manner as a situation where the lubricant composition or the grease composition was depleted from the friction surface after a long period of use. The test specimen after this treatment was checked for friction under the same conditions as when the initial friction was measured. This was defined as “rubbing after wiping”.
(4) In this post-wiping friction test, “○” indicates that the coefficient of friction after wiping is within 50% of the initial friction coefficient, and “Δ” indicates that the amount of increase is 50% or more. . However, among “Δ”, the case where abnormal noise was generated during the friction test after wiping, a phenomenon such as stick-slip occurred, or the friction waveform was greatly disturbed was evaluated as “x”.

<Evaluation method 2 (change in adhesive strength)>
Each sample was applied to a smooth glass plate, a PET film was pasted thereon, a 180 ° peel test between the two was performed, and the degree of adhesion was evaluated. Specifically, the procedure was as follows.
(1) First, a lubricant composition or a grease composition was applied to a clean glass plate at several μm to 10 μm. In order to adjust the thickness, the coating was diluted with a fluorine-based solvent or various good solvents as necessary. After coating, it was sufficiently dried at room temperature.
(2) A PET film having a thickness of 10 μm was pasted on the coating film, pressed from above with a rubber roller at about 2 N, and left for 1 minute.
(3) The PET film was peeled 180 degrees (that is, parallel to the glass surface) at a length of 100 mm at a speed of 500 mm / min, and the maximum peel strength was measured 10 times. The obtained peel strength maximum value was averaged, and the result was divided by the film width, which was converted as the peel strength per unit width (10 mm). Other conditions were measured according to (JIS C0806- 3). This peel strength was defined as “initial bond strength”. Here, the measurement was performed with the film width itself set to 10 mm.
(4) Next, with respect to the sample after the initial peeling, the glass coated surface was lightly wiped with a paper waste to obtain a “after wiping” sample. By the way, all of the examples, ie, those to which the vinylidene fluoride-hexafluoropropylene copolymer was added, had residues on the surface. Therefore, a new PET film was again pasted on this residue, and the peel strength was measured and converted in the same manner as the initial adhesive strength. This peel strength was defined as “adhesive strength after wiping”. In the case of the comparative example, the residue itself was not left, and a new PET film could not be pasted. The above results are summarized in Table 1 below.

  As is clear from the comparative examples in Table 1, the frictional behavior deteriorated after wiping with the lubricant alone, the grease alone, and the composition containing the conventional inorganic / resin filler. This is thought to be because the lubricant and filler disappeared from the lubricated surface by simple wiping.

  On the other hand, as is clear from the examples in Table 1, the lubricant composition or grease composition containing the vinylidene fluoride-hexafluoropropylene copolymer exhibited an excellent lubricating effect even after wiping. As can be seen from the value of the adhesive strength after wiping, it is considered that even after wiping, the copolymer, the lubricant and the grease are present on the lubrication surface and exhibit the effect of reducing the frictional force.

  The verification results of this example and the comparative example show that the lubricant composition and grease composition of this example continue even when the conventional lubricant and grease move or disappear due to physical force and time. This means that the frictional force reducing effect can be maintained. From this result, even in an actual use environment, it is possible to expect a lubricant effect having a longer life and excellent durability.

  In addition, from the comparison of the results of Examples 0-1 and 0-2 and Example 0-3, in the lubricant composition, in order to maintain the frictional force reduction effect for a longer time, the ratio of the copolymer is 5 wt. It is preferable to be about% or more. Moreover, in the grease composition from the results of Example 1-1 and Example 1-2. In order to maintain the effect of reducing the frictional force for a longer time, the ratio of the copolymer is preferably about 1% by weight or more.

  In order to increase the “adhesive strength” in the table for the lubricant composition, as can be seen from the difference in “adhesive strength after wiping” between Example 0-3 and Example 0-4, for example, a copolymer It is preferable to increase the mixing ratio. In the composition of this example, it was found that sufficient adhesive strength was obtained when the content was about 10% by weight or more. Thus, it is possible to adjust adhesive force by the addition amount of a copolymer suitably according to a use environment and the objective.

  As described above, the vinylidene fluoride-hexafluoropropylene copolymer, which is a liquid fluororubber used in the present invention, strongly adheres to the coated surface as a rubber component, and at the same time holds a lubricating oil component, thereby achieving stable low friction. The state can be maintained. For this reason, unlike conventional compositions, it is considered that long-term silencing characteristics are exhibited.

  In addition, as shown in the examples, all concentrations and combinations are possible, so that it can be applied widely and suitably. It is also easy to adjust the optimum amount of use by selecting an appropriate solvent and adjusting the degree of dilution.

  Since the copolymer used in the present invention is a fluorine-based copolymer, there are few problems such as compatibility with the resin to be applied, and it is widely used from general amorphous resins to engineering plastics, as well as metals and ceramic materials. Application is possible.

Claims (10)

  When the weight of the whole composition is 100 parts by weight, it contains 0.1 part by weight or more of vinylidene fluoride-hexafluoropropylene copolymer having an absolute viscosity at 40 ° C. of 100 Pa · s or more. Lubricant composition.   A vinylidene fluoride-hexafluoropropylene copolymer having an absolute viscosity at 40 ° C. of 100 Pa · s or more and a lubricating oil are contained, and the total weight of the vinylidene fluoride-hexafluoropropylene copolymer and the lubricating oil is 100. 2. The vinylidene fluoride-hexafluoropropylene copolymer is in the range of 0.1 to 90 parts by weight and the lubricating oil is in the range of 10 to 99.9 parts by weight with respect to parts by weight. Lubricant composition.   The lubricating oil according to claim 2, wherein the lubricating oil comprises one or more selected from a fluorine-based oil, a silicone oil, a synthetic hydrocarbon-based oil, an ester-based oil, and a mineral oil. Agent composition.   A vinylidene fluoride-hexafluoropropylene copolymer having an absolute viscosity at 40 ° C. of 100 Pa · s or more, a lubricating oil, and a thickener, and the vinylidene fluoride-hexafluoropropylene copolymer and the above The vinylidene fluoride-hexafluoropropylene copolymer is in the range of 0.1 to 90 parts by weight and the lubricating oil is in the range of 10 to 99.9 parts by weight with respect to 100 parts by weight of the total weight of the lubricating oil. A grease composition.   The grease constituted by the lubricating oil and the thickener includes one or more selected from fluorine-based grease, silicone grease, and hydrocarbon-based grease. Grease composition. A lubricant composition according to any one of claims 1 to 3 and / or a grease composition according to any one of claims 4 to 5 and one or more selected from the group of the following hydrocarbon solvents: And a diluent containing the lubricant.
Selection group: acetone, methanol, ethanol, normal propyl alcohol, isopropyl alcohol, petroleum benzine, petroleum ether, ligroin, methyl acetate, ethyl acetate, butyl acetate, isobutyl acetate, toluene, xylene, benzene, tetrahydrofuran, tetrachloroethylene, dichloroethane, 1, 1,1-trichloroethane, ethylene glycol monomethyl ether, methyl ethyl ketone, diethyl ether, dibutyl ether The lubricant composition according to any one of claims 1 to 3 and / or the grease composition according to any one of claims 4 to 5 and one or more selected from the group of the following fluorinated solvents: And a diluent for a lubricating oil.
Selection group: perfluorocarbon, hydrofluorocarbon, hydrofluoroether, hadrofluoroolefin, perfluoropolyether   A sliding member comprising a lubricating film formed of the lubricant composition according to claim 1.   A sliding member comprising a lubricating film formed of the grease composition according to claim 4.   A sliding member comprising a lubricating coating formed of the lubricating oil diluted solution according to claim 6.