WO2017217297A1 - 潤滑油基油 - Google Patents
潤滑油基油 Download PDFInfo
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- WO2017217297A1 WO2017217297A1 PCT/JP2017/021118 JP2017021118W WO2017217297A1 WO 2017217297 A1 WO2017217297 A1 WO 2017217297A1 JP 2017021118 W JP2017021118 W JP 2017021118W WO 2017217297 A1 WO2017217297 A1 WO 2017217297A1
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
- C10M105/32—Esters
- C10M105/42—Complex esters, i.e. compounds containing at least three esterified carboxyl groups and derived from the combination of at least three different types of the following five types of compound: monohydroxy compounds, polyhydroxy compounds, monocarboxylic acids, polycarboxylic acids and hydroxy carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/30—Complex esters, i.e. compounds containing at leasst three esterified carboxyl groups and derived from the combination of at least three different types of the following five types of compounds: monohydroxyl compounds, polyhydroxy xompounds, monocarboxylic acids, polycarboxylic acids or hydroxy carboxylic acids
- C10M2207/301—Complex esters, i.e. compounds containing at leasst three esterified carboxyl groups and derived from the combination of at least three different types of the following five types of compounds: monohydroxyl compounds, polyhydroxy xompounds, monocarboxylic acids, polycarboxylic acids or hydroxy carboxylic acids used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/02—Viscosity; Viscosity index
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/081—Biodegradable compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/02—Bearings
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/08—Hydraulic fluids, e.g. brake-fluids
Definitions
- the present invention relates to a lubricating base oil, and more particularly, to a lubricating base oil having excellent biodegradability, excellent lubricity (wear resistance), and extremely excellent rust resistance against seawater. It can be suitably used for bearing oil, hydraulic oil, gear oil, and the like, and can be particularly suitably used for stern tube bearing oil used in the marine region.
- Lubricating oil is no exception, and there is an increasing demand for lubricating oil that can reduce environmental impact.
- biodegradable lubricants that are easily degraded in nature even if leaked and have little impact on the ecosystem are drawing attention.
- biodegradable lubricants are used as countermeasures against leakage into rivers and oceans, and there are areas and uses where use is mandatory in some areas.
- biodegradable lubricants is mandatory for 2-cycle engine oil for outboard motors used in lakes and marshes, and hydraulic fluids for construction machinery used near drinking water sampling rivers.
- the use of biodegradable lubricants is mandatory for marine lubricants used in wetted parts.
- Patent Document 1 discloses a two-cycle engine oil that is excellent in biodegradability and includes a polybutene, a polyol ester, a paraffinic hydrocarbon solvent, and an ashless detergent.
- Patent Document 2 discloses biodegradability, oxidation stability, wear resistance, low temperature composed of a complex ester of a polyhydric alcohol, a linear saturated fatty acid, and a linear saturated polycarboxylic acid, an antioxidant, and a load-bearing additive.
- a hydraulic fluid having excellent fluidity is disclosed.
- Patent Document 3 discloses a stern tube bearing oil that is composed of a water-soluble (poly) alkylene glycol, a water-soluble thickener, and a water-soluble rust inhibitor, and is excellent in compatibility with seawater, lubricity, and biodegradability. ing.
- biodegradable lubricating oil is a lubricating oil that is very often used near watersides such as rivers and oceans. For this reason, there are many opportunities for water to be mixed into the lubricating oil, and sufficient consideration must be given to metal corrosion. Particularly in seawater, metal corrosion is likely to occur, and further consideration is required for lubricating oil that may be mixed with seawater, which is used in ships, offshore wind turbines, ocean current generators, and the like. Among these applications, stern tube bearing oils for marine lubricating oils are particularly required to have a very high rust prevention performance against seawater.
- An object of the present invention is to provide a lubricating base oil that has excellent biodegradability, excellent lubricity (wear resistance), and excellent rust resistance against seawater.
- a specific ester compound of pentaerythritol and a specific linear fatty acid and adipic acid has excellent biodegradability and excellent lubrication. Have been found to have excellent properties (wear resistance) and excellent rust resistance.
- the present invention is as follows.
- (A) The mole percentage A mol% of the constituent derived from pentaerythritol is 20 to 30 mol%
- (B) the mole percentage B mol% of the constituent derived from a linear fatty acid having 14 to 22 carbon atoms is 55 to 79.
- the lubricating base oil of the present invention has excellent biodegradability, excellent lubricity (wear resistance), and excellent rust resistance against seawater, so that it can be used for bearing oil, hydraulic oil, gear oil, etc. It can be preferably used for stern tube bearing oils used in the marine region.
- the numerical range defined using the symbol “ ⁇ ” includes the numerical values at both ends (upper limit and lower limit) of “ ⁇ ”. For example, “2 to 5” represents 2 or more and 5 or less.
- the lubricating base oil of the present invention is (A) pentaerythritol, (B) a linear fatty acid having 14 to 22 carbon atoms, and (C) an ester of adipic acid.
- pentaerythritol As a raw material for the ester of the present invention, pentaerythritol is used. Since pentaerythritol is a neopentyl polyol having a neopentyl skeleton, it is excellent in oxidation stability and heat resistance. Other neopentyl polyols include neopentyl glycol, trimethylolpropane, and dipentaerythritol. However, when neopentyl glycol or trimethylolpropane is used as a raw material, the rust prevention property of the resulting ester may be insufficient, and when dipentaerythritol is used as a raw material, heat resistance may be insufficient. . For this reason, the neopentyl polyol used in the present invention is preferably pentaerythritol.
- the linear fatty acid having 14 to 22 carbon atoms used in the present invention is a linear saturated fatty acid having 14 to 22 carbon atoms, a linear unsaturated fatty acid having 14 to 22 carbon atoms, or a mixed fatty acid thereof.
- Examples of the linear saturated fatty acid having 14 to 22 carbon atoms include myristic acid, palmitic acid, stearic acid, arachidic acid, and behenic acid.
- Examples of the linear unsaturated fatty acid having 14 to 22 carbon atoms include myristoleic acid, palmitoleic acid, oleic acid, linoleic acid, linolenic acid, and erucic acid.
- linear saturated fatty acid and linear unsaturated fatty acid preferably palmitoleic acid, oleic acid, linoleic acid, linolenic acid, erucic acid, particularly preferably oleic acid, linoleic acid, linolenic acid, and more preferably Oleic acid.
- lubricity wear resistance
- the number of carbon atoms is greater than 22, there is a risk of deterioration in fuel consumption caused by energy loss due to the internal resistance of the lubricating oil itself due to high viscosity, and the generated ester may become solid and cannot be used as a lubricating oil.
- the content of the linear unsaturated fatty acid is preferably 60% by mass or more, and more preferably 65% by mass or more. 70 mass% or more is particularly preferable.
- adipic acid is used as the dibasic acid for the ester raw material. If succinic acid having a smaller number of carbon atoms than adipic acid is used, it is difficult to obtain an effect when various additives are added, so that it may not be suitable as a lubricating base oil. On the other hand, if sebacic acid having a larger number of carbon atoms than adipic acid or maleic acid containing an unsaturated bond is used, oxidation stability and heat resistance may be deteriorated. For this reason, the dibasic acid used in the present invention is preferably adipic acid.
- the ester constituting the lubricating base oil of the present invention has (A) the molar percentage A mol% of the component derived from pentaerythritol is 20 to 30 mol%, and (B) derived from a linear fatty acid having 14 to 22 carbon atoms.
- molar percentages B mol% of the components is from 55 to 79 mol%
- an ester which is molar percentage C mol% is 1 to 15 mol% of the component derived from the (C) adipic acid
- the molar ratio (C mol / B mol ) of the component derived from (C) adipic acid to the component derived from linear fatty acids of several 14 to 22 is 0.02 to 0.25.
- a mol% , B mol% , C mol% , and (C mol / B mol ) are values calculated after analyzing the ester compound by 1 HNMR and obtaining the molar amount of the constituent component derived from each raw material.
- the measurement conditions for 1 HNMR are shown below.
- the integrated values of the four peaks are calculated as follows, and the molar amounts A mol , B mol , and C mol of each constituent component derived from each raw material are used.
- a mol ⁇ integral value of peak (I) + integral value of peak (II) ⁇ / 8
- B mol Integral value of peak (III) / 3
- C mol ⁇ integral value of peak (IV) ⁇ (B mol ⁇ 2) ⁇ / 4
- a mol% , B mol% , and C mol% are calculated as follows.
- a mol% 100 ⁇ A mol / (A mol + B mol + C mol )
- B mol% 100 ⁇ B mol / (A mol + B mol + C mol )
- C mol% 100 ⁇ C mol / (A mol + B mol + C mol )
- the molar ratio of each component can be calculated from the above B mol and C mol as follows.
- (B) Molar ratio of component derived from a linear fatty acid having 14 to 22 carbon atoms and component derived from (C) adipic acid C mol / B mol
- (A) Molar ratio of pentaerythritol-derived constituent component to (C) adipic acid-derived constituent component C mol / A mol
- A) Molar ratio of component derived from pentaerythritol and component (B) derived from a linear fatty acid having 14 to 22 carbon atoms B mol / A mol
- the B mol% is preferably 60 to 79 mol%, more preferably 70 to 75 mol%.
- C mol% is preferably 2 to 10 mol%, more preferably 3 to 6 mol%.
- C mol / B mol is 0.02 to 0.25.
- C mol / B mol is less than 0.02, rust preventive properties may be deteriorated.
- C mol / B mol exceeds 0.25, energy loss due to the internal resistance of the lubricating oil itself associated with high viscosity increases, which may lead to deterioration of fuel consumption and biodegradability.
- C mol / B mol is more preferably 0.03 to 0.20, and further preferably 0.05 to 0.10.
- C mol / A mol is preferably 0.05 to 0.55.
- C mol / A mol 0.05 or more By making C mol / A mol 0.05 or more, rust prevention can be further improved. Further, by setting C mol / A mol to 0.55 or less, energy loss due to internal resistance of the lubricating oil itself due to high viscosity can be prevented, and deterioration of fuel consumption and biodegradability can be suppressed. From this viewpoint, C mol / A mol is preferably 0.10 to 0.40, and more preferably 0.15 to 0.30.
- B mol / A mol is preferably 2.0 to 4.0.
- B mol / A mol is preferably 2.3 to 3.8, and more preferably 2.5 to 3.5.
- the ester in the present invention has a hydroxyl value of 10 to 100 mgKOH / g.
- the hydroxyl value of this ester is less than 10 mgKOH / g, the rust prevention property may be deteriorated.
- the hydroxyl value of the ester exceeds 100 mgKOH / g, lubricity (wear resistance) and oxidation stability may be deteriorated.
- the hydroxyl value of the ester of the present invention is more preferably 15 to 75 mgKOH / g or less, still more preferably 20 to 60 mgKOH / g or less.
- the ester of the present invention preferably has a kinematic viscosity at 40 ° C. of 60 to 300.
- the lubricity wear resistance
- the kinematic viscosity of the ester at 40 ° C. is more preferably 70 to 200, and further preferably 75 to 150.
- the ester of the present invention preferably has an acid value of 10.0 mgKOH / g or less.
- the acid value of the ester is more preferably 5.0 mgKOH / g or less, and still more preferably 3.0 mgKOH / g or less.
- the lubricating base oil according to the present invention is excellent in biodegradability, and when the biodegradability test is performed according to any of OECD301A, B, C, D, E, F, the biodegradability is 60% or more. It is preferable that
- the lubricating oil of the present invention may contain conventionally known lubricating oil additives as necessary in order to further enhance the performance.
- additives an antioxidant, an antiwear agent, a metal deactivator, an antifoaming agent, and the like are adjusted by appropriately mixing with the ester as desired, in an amount that does not impair the purpose of the present invention. May be.
- additives may be used individually by 1 type, and may be used in combination of 2 or more type.
- antioxidants examples include phenol-based antioxidants, amine-based antioxidants, and sulfur-based antioxidants.
- phenolic antioxidants include 2,6-di-t-butylparacresol, 4,4′-methylenebis (2,6-di-t-butylphenol), 4,4′-thiobis (2-methyl). -6-t-butylphenol), 4,4'-bis (2,6-di-t-butylphenol) and the like.
- amine-based antioxidants examples include phenyl- ⁇ -naphthylamine, phenyl- ⁇ -naphthylamine, alkylphenyl- ⁇ -naphthylamine, alkylphenyl- ⁇ -naphthylamine, bis (alkylphenyl) amine, phenothiazine, monooctidiphenylamine, and the like. Can be mentioned. Furthermore, some of the amine antioxidants can be classified as quinoline antioxidants. Examples of the quinoline antioxidant include 2,2,4-trimethyl-1,2-dihydroquinoline or a polymer thereof, 6-methoxy-2,2,4-trimethyl-1,2-dihydroquinoline or a polymer thereof. And 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline or a polymer thereof.
- sulfur-based antioxidants examples include alkyl disulfides and benzodiazoles.
- amine-based antioxidants are particularly preferable, bis (alkylphenyl) amines and quinoline-based antioxidants are more preferable, and 4,4′-bis ( ⁇ , ⁇ -dimethylbenzyl) diphenylamine is more preferable. And 2,2,4-trimethyl-1,2-dihydroquinoline or a polymer thereof.
- These antioxidants can be used alone or in admixture of two or more. When two or more types of antioxidants are used in combination, an amine antioxidant and a phenolic antioxidant are preferably used in combination.
- antiwear agent examples include sulfurized olefins, sulfurized fats and oils, sulfides, phosphate esters, phosphite esters, thiophosphate esters, phosphate ester amine salts, zinc dialkyldithiophosphates, and dialkyl polysulfides. These antiwear agents can be used alone or in admixture of two or more.
- metal deactivator benzotriazole or its derivative (s), an alkenyl succinic acid ester etc. are mentioned, for example.
- metal deactivators can be used alone or in admixture of two or more.
- antifoaming agent examples include silicone compounds.
- the mixing, mixing, and adding method of each additive is not particularly limited, and various methods can be adopted.
- the order of blending, mixing, and addition is not particularly limited, and various methods can be employed. For example, a method in which various additives are directly added to an ester which is a base oil and heated and mixed, or a method in which a high concentration solution of an additive is prepared in advance and these are mixed with a base oil may be used. .
- 400 g (2.94 mol) of pentaerythritol 93 g (0.63 mol) of adipic acid
- linear fatty acid myristic acid: 2 0.0% by mass, myristoleic acid: 1.4% by mass
- palmitic acid 4.2% by mass
- palmitoleic acid 7.0% by mass
- heptadecenoic acid 1.6% by mass
- linoleic acid 6.7 mass%
- linolenic acid linolenic acid:
- Examples 2 to 7 In the same manner as in Example 1, various esters of Examples 2 to 7 shown in Table 1 were obtained.
- Comparative Example 6 instead of the linear fatty acid used in Example 1, a mixture of caprylic acid (C8 linear saturated fatty acid): 55% by mass and caproic acid (C10 linear saturated fatty acid): 45% by mass was used. In the experimental procedure, the ester of Comparative Example 6 shown in Table 2 was obtained in the same manner as in Example 1.
- Biodegradability test A biodegradability test was performed according to OECD301C. In addition, the Eco Mark Secretariat of the Japan Environment Association has a biodegradability of 60% or more in this test and satisfies the standards as a biodegradable lubricant. In this test, those having a biodegradability of 70% or more were evaluated as ⁇ , those having 60% or more and less than 70% were evaluated as ⁇ , and those having a biodegradability of less than 60% were evaluated as ⁇ .
- the lubricating base oil composed of the esters of Examples 1 to 7 that satisfy the requirements of the present invention is excellent in all of rust prevention, lubricity (wear resistance), and biodegradability. Recognize.
- the ester of Comparative Example 1 had a low C mol% and a low (C mol / B mol ), and therefore was inferior in rust prevention. Since the ester of Comparative Example 2 had a high C mol% and a high (C mol / B mol ), the biodegradability was poor. Since the ester of Comparative Example 3 had a high A mol% and a high hydroxyl value, the lubricity (wear resistance) was low. Since the ester of Comparative Example 4 had a low A mol% , a high B mol% , and a low hydroxyl value, the rust prevention property was inferior.
- the ester of Comparative Example 5 did not use pentaerythritol, but instead used trimethylolpropane as a raw material, the rust prevention property was poor.
- the ester of Comparative Example 6 was inferior in lubricity (abrasion resistance) because linear fatty acids having less than 14 carbon atoms were used as raw materials. Moreover, the anti-rust property was also inferior.
- the lubricating base oil of the present invention is excellent in biodegradability and has excellent rust prevention properties and excellent lubricity. For this reason, it can be used suitably for hydraulic oil, gear oil, bearing oil, etc., and can be suitably used especially for stern tube bearing oil used in the marine region.
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Abstract
Description
(A)ペンタエリスリトール由来の構成成分のモル百分率Amol%が20~30モル%であり、(B)炭素数14~22の直鎖脂肪酸由来の構成成分のモル百分率Bmol%が55~79モル%であり、(C)アジピン酸由来の構成成分のモル百分率Cmol%が1~15モル%であるエステルであって、(B)炭素数14~22の直鎖脂肪酸由来の構成成分と(C)アジピン酸由来の構成成分のモル比(Cmol/Bmol)が0.02~0.25であり、かつ水酸基価が10~100mgKOH/gであるエステルからなることを特徴とする、潤滑油基油。
以下に1HNMRの測定条件を示す。
・分析機器:1HNMR
・溶媒:重クロロホルム
具体的には、以下の4つのピークを用いる。
・ピーク(I):3.40~3.70ppm=(A)ペンタエリスリトールの未反応のヒドロキシル基のα位の水素
・ピーク(II):4.00~4.20ppm=(A)ペンタエリスリトールの反応済みのヒドロキシル基のα位の水素{ピーク(I)とピーク(II)とを合わせて8個}
・ピーク(III):0.85~0.90ppm=(B)炭素数14~22の直鎖脂肪酸の末端の炭素に結合した水素(3個)
・ピーク(IV):2.25~2.35ppm=(C)アジピン酸のカルボニル基のα位の水素(4個)および(B)炭素数14~22の直鎖脂肪酸のカルボニル基のα位の水素(2個)
Amol={ピーク(I)の積分値+ピーク(II)の積分値}/8
Bmol=ピーク(III)の積分値/3
Cmol={ピーク(IV)の積分値-(Bmol×2)}/4
Amol%=100×Amol/(Amol+Bmol+Cmol)
Bmol%=100×Bmol/(Amol+Bmol+Cmol)
Cmol%=100×Cmol/(Amol+Bmol+Cmol)
(B)炭素数14~22の直鎖脂肪酸由来の構成成分と(C)アジピン酸由来の構成成分とのモル比=Cmol/Bmol
(A)ペンタエリスリトール由来の構成成分と(C)アジピン酸由来の構成成分とのモル比=Cmol/Amol
(A)ペンタエリスリトール由来の構成成分と(B)炭素数14~22の直鎖脂肪酸由来の構成成分とのモル比=Bmol/Amol
フェノール系酸化防止剤としては、例えば、2,6-ジ-t-ブチルパラクレゾール、4,4’-メチレンビス(2,6-ジ-t-ブチルフェノール)、4,4’-チオビス(2-メチル-6-t-ブチルフェノール)、4,4’-ビス(2,6-ジ-t-ブチルフェノール)などが挙げられる。
これらの酸化防止剤は、それぞれ単独で又は2種類以上を混合して用いることができる。2種類以上の酸化防止剤を混合して用いる場合、アミン系酸化防止剤とフェノール系酸化防止剤の併用が好ましい。
前記金属不活性剤としては、例えば、ベンゾトリアゾール又はその誘導体、アルケニルコハク酸エステルなどが挙げられる。これらの金属不活性剤は、それぞれ単独で又は2種類以上を混合して用いることができる。
前記消泡剤としては、シリコーン系化合物等が挙げられる。
〔ペンタエリスリトール/アジピン酸/炭素数14~22の直鎖脂肪酸=1/0.21/3.12(モル比)のエステル合成〕
温度計、窒素導入管、攪拌機及び冷却管を取り付けた3Lの4つ口フラスコに、ペンタエリスリトールを400g(2.94mol)、アジピン酸を93g(0.63mol)、直鎖脂肪酸(ミリスチン酸:2.0質量%、ミリストレイン酸:1.4質量%、ペンタデセン酸:0.2質量%、パルミチン酸:4.2質量%、パルミトレイン酸:7.0質量%、ヘプタデセン酸:1.6質量%、ステアリン酸:1.2質量%、オレイン酸:73.8質量%、リノール酸:6.7質量%、リノレン酸:1.8質量%、アラキジン酸:0.1質量%)を2519g(9.05mol)仕込み、窒素気流下、240℃で反応水を留去しつつ常圧で反応させた。反応物を冷却後、反応物に対して0.5質量%の活性白土を加えて吸着を行い、ろ過して吸着剤を除去することで所望のエステルを得た。
実施例1と同様にして、表1に示す実施例2~7の各種エステルを得た。
実施例1と同様にして、表2に示す比較例1~4の各種エステルを得た。
ペンタエリスリトールの代わりにトリメチロールプロパンを原料とし、実験手順においては実施例1と同様にして、表2に示す比較例5のエステルを得た。
実施例1で使用した直鎖脂肪酸の代わりに、カプリル酸(炭素数8の直鎖飽和脂肪酸):55質量%とカプロン酸(炭素数10の直鎖飽和脂肪酸):45質量%の混合物を用い、実験手順においては実施例1と同様にして、表2に示す比較例6のエステルを得た。
得られたエステルについて、前述のようにH1NMR測定を行い、Amol%、Bmol%、Cmol%、(Cmol/Bmol)、(Amol/Cmol)(Bmol/Amol)を算出した。
日本工業規格JIS K 2283に従い、測定した。
(引火点)
日本工業規格JIS K2565に従い、クリーブランド開放式にて引火点を測定した。本試験での引火点が高いほど、難燃性に優れている。
(酸価及び水酸基価)
日本工業規格JIS K0070に従い、測定した。
OECD301Cに従い、生分解性試験を実施した。なお、公益財団法人日本環境協会エコマーク事務局では、本試験での生分解性が60%以上で生分解性潤滑油としての基準を満たしている。本試験では生分解性が70%以上のものを◎とし、60%以上70%未満のものを○とし、60%未満のものを×とした。
高速シェル4球試験機において、ASTM D4172に準じ、摩耗痕径(μm)を測定した。磨耗痕径(μm)が小さいほど、耐摩耗性が優れていることを示す。
本試験では、日本工業規格JIS K2510の潤滑油さび止め性能試験(人工海水24時間)よりも厳しい条件で試験を実施した。本試験では、10重量%の海水を添加した混合液(60℃)に、研磨洗浄した棒鋼(S20C)を浸漬し、1週間、2週間、1ヵ月後のさびの発生状態を観察した。なお、浸漬中は混合液を攪拌し続けた。本試験ではさびが発生しなかったものを○、さびが発生したものを×とした。
比較例2のエステルは、Cmol%が高く、(Cmol/Bmol)が高いため、生分解性が劣っていた。
比較例3のエステルは、Amol%が高く、また水酸基価が高いため、潤滑性(耐摩耗性)が低かった。
比較例4のエステルは、Amol%が低く、Bmol%が高く、また水酸基価が低いため、さび止め性が劣っていた。
比較例5のエステルは、ペンタエリスリトールを用いず、その代わりにトリメチロールプロパンを原料として用いているため、さび止め性が劣っていた。
比較例6のエステルは、直鎖脂肪酸に炭素数が14より少ない直鎖脂肪酸を原料として用いているため、潤滑性(耐摩耗性)が劣っていた。また、さび止め性も劣っていた。
Claims (1)
- (A)ペンタエリスリトール由来の構成成分のモル百分率Amol%が20~30モル%であり、(B)炭素数14~22の直鎖脂肪酸由来の構成成分のモル百分率Bmol%が55~79モル%であり、(C)アジピン酸由来の構成成分のモル百分率Cmol%が1~15モル%であるエステルであって、(B)炭素数14~22の直鎖脂肪酸由来の構成成分と(C)アジピン酸由来の構成成分のモル比(Cmol/Bmol)が0.02~0.25であり、かつ水酸基価が10~100mgKOH/gであるエステルからなることを特徴とする、潤滑油基油。
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| US16/309,498 US10711217B2 (en) | 2016-06-14 | 2017-06-07 | Lubricant base oil |
| SG11201810717XA SG11201810717XA (en) | 2016-06-14 | 2017-06-07 | Lubricant base oil |
| EP17813195.9A EP3470498B1 (en) | 2016-06-14 | 2017-06-07 | Lubricant base oil |
| JP2018523689A JP6970387B2 (ja) | 2016-06-14 | 2017-06-07 | 潤滑油基油 |
| CN201780036735.1A CN109312245B (zh) | 2016-06-14 | 2017-06-07 | 润滑油基油 |
| KR1020187038140A KR102373210B1 (ko) | 2016-06-14 | 2017-06-07 | 윤활유 기유 |
| PH12018502616A PH12018502616B1 (en) | 2016-06-14 | 2018-12-12 | Lubricant base oil |
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| JP2020066645A (ja) * | 2018-10-22 | 2020-04-30 | 新日本理化株式会社 | 潤滑油基油 |
| JP2021196608A (ja) * | 2020-06-15 | 2021-12-27 | 日油株式会社 | トナー用ワックス |
| JP2022076932A (ja) * | 2020-11-10 | 2022-05-20 | 日本アイ・ティ・エフ株式会社 | 摺動部材、潤滑油および摺動機構 |
| WO2023074424A1 (ja) * | 2021-10-26 | 2023-05-04 | 日油株式会社 | 潤滑油組成物 |
| WO2025169935A1 (ja) * | 2024-02-09 | 2025-08-14 | 日油株式会社 | 生分解性潤滑油組成物 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108148362B (zh) * | 2017-12-29 | 2020-03-17 | 浙江佳华精化股份有限公司 | 一种pa工程塑料用具有内外润滑作用的组合物 |
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- 2017-06-07 US US16/309,498 patent/US10711217B2/en active Active
- 2017-06-07 EP EP17813195.9A patent/EP3470498B1/en active Active
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Also Published As
| Publication number | Publication date |
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| PH12018502616A1 (en) | 2019-10-07 |
| PH12018502616B1 (en) | 2021-07-02 |
| KR102373210B1 (ko) | 2022-03-10 |
| KR20190018449A (ko) | 2019-02-22 |
| CN109312245A (zh) | 2019-02-05 |
| CN109312245B (zh) | 2021-09-14 |
| EP3470498A4 (en) | 2020-02-12 |
| US10711217B2 (en) | 2020-07-14 |
| SG11201810717XA (en) | 2018-12-28 |
| JPWO2017217297A1 (ja) | 2019-04-04 |
| US20190241823A1 (en) | 2019-08-08 |
| JP6970387B2 (ja) | 2021-11-24 |
| EP3470498B1 (en) | 2023-11-15 |
| EP3470498A1 (en) | 2019-04-17 |
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