JP2018535307A - How to improve the release of lubricating oil - Google Patents

How to improve the release of lubricating oil Download PDF

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JP2018535307A
JP2018535307A JP2018545687A JP2018545687A JP2018535307A JP 2018535307 A JP2018535307 A JP 2018535307A JP 2018545687 A JP2018545687 A JP 2018545687A JP 2018545687 A JP2018545687 A JP 2018545687A JP 2018535307 A JP2018535307 A JP 2018535307A
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lubricating oil
alkyl acrylate
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oil
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JP6878452B2 (en
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ガラパリ，スラバニ
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Shell Internationale Research Maatschappij BV
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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
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/10—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate
    • C—CHEMISTRY; METALLURGY
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/10—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate
    • C10M145/12—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate monocarboxylic
    • C10M145/14—Acrylate; Methacrylate
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    • 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
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • 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
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • C10M169/041—Mixtures of base-materials and additives the additives being macromolecular compounds only
    • 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
    • C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
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    • 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
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/102—Aliphatic fractions
    • C10M2203/1025—Aliphatic fractions used as base material
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/0206—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers used as base material
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
    • C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/17—Fisher Tropsch reaction products
    • C10M2205/173—Fisher Tropsch reaction products used as base material
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
    • C10M2209/084—Acrylate; Methacrylate
    • 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
    • C10N2020/04—Molecular weight; Molecular weight distribution
    • 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
    • C10N2030/02—Pour-point; 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
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/18—Anti-foaming property
    • 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
    • C10N2030/30—Anti-misting
    • 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
    • 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
    • C10N2070/00—Specific manufacturing methods for lubricant compositions

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)

Abstract

本発明は、ＡＳＴＭ Ｄ３４２７によって計測される潤滑油の放気を向上させる方法を提供する。該方法は、潤滑油中に添加剤を混合するステップを含む。
【選択図】なしThe present invention provides a method for improving the release of lubricating oil as measured by ASTM D3427. The method includes mixing an additive in the lubricating oil.
[Selection figure] None

Description

本発明は、潤滑油の放気を向上させる方法に関連する。   The present invention relates to a method for improving the release of lubricating oil.

潤滑油は、接触する表面を保護し、滑りやすくするために使用され、また、動力の伝達のためにも使用され得る。空気混入は潤滑油の効き目を低減し得ることが知られている。空気混入は、（典型的には１ｍｍ未満の直径を有する）気泡が潤滑油全体に分散している現象である。混入した空気は、遊離空気（系内の一部内に閉じ込められたひとまとまりの空気）、溶存空気（潤滑油は、６〜１２質量パーセントの間の溶存空気を含有し得る）、及び泡（油の表面上に集まる、直径が１ｍｍよりも一般的に大きい気泡）とは区別され得る。空気混入は、潤滑性の喪失、潤滑油の酸化の可能性、動作中の騒音、効率の低下、及びより高い油温度を含む多くの有害な結果をもたらし得る。   Lubricating oils are used to protect the contacting surfaces and make them slippery, and can also be used for power transmission. It is known that aeration can reduce the effectiveness of the lubricating oil. Aeration is a phenomenon in which bubbles (typically having a diameter of less than 1 mm) are dispersed throughout the lubricating oil. The entrained air can be free air (a group of air trapped within a portion of the system), dissolved air (a lubricant can contain between 6-12 mass percent dissolved air), and foam (oil Can be distinguished from air bubbles that are generally larger than 1 mm in diameter. Aeration can have many detrimental consequences including loss of lubricity, possible oxidation of the lubricant, noise during operation, reduced efficiency, and higher oil temperatures.

潤滑油の空気混入性は、一般的にＡＳＴＭ Ｄ３４２７放気試験を使用して計測される。試験は、試験条件下及び指定の温度において、油に混入した空気が体積の０．２％まで低減するために必要とされる時間を計測する。   Lubricating oil aeration is typically measured using the ASTM D3427 air release test. The test measures the time required to reduce the air entrained in the oil to 0.2% of the volume under the test conditions and at the specified temperature.

本発明は、潤滑油の空気混入性を向上させることを目指している。   The present invention aims to improve the air mixing property of the lubricating oil.

したがって、本発明はＡＳＴＭ Ｄ３４２７によって計測される潤滑油の放気を向上させる方法を提供し、該方法は高せん断ミキサーを用いて、添加剤を潤滑油中に混合することを含み、添加剤はアルキルアクリレートポリマーである。   Accordingly, the present invention provides a method for improving lubricant venting as measured by ASTM D3427, the method comprising mixing the additive into the lubricant using a high shear mixer, the additive comprising: Alkyl acrylate polymer.

そのようなアルキルアクリレートポリマーは、以前は消泡剤として使用されてきた。放気時間は、一般的に、添加剤、特にシリコーン油のような消泡剤の追加でより悪化すると考えられる。これは、“Ｐｒｏｐｅｒｔｉｅｓ ｏｎ Ｆｏａｍ ｉｎ Ｌｕｂｒｉｃａｔｉｎｇ Ｏｉｌｓ”、９〜１３ページ、２００３年５月Ｌｕｂｒｉｃａｔｉｏｎ Ｅｎｇｉｎｅｅｒｉｎｇ、Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｓｏｃｉｅｔｙ ｏｆ Ｔｒｉｂｏｌｏｇｉｓｔｓ ａｎｄ Ｌｕｂｒｉｃａｔｉｏｎ Ｅｎｇｉｎｅｅｒｓにおいて、Ｄｕｎｃａｎｓｏｎにより説明される。   Such alkyl acrylate polymers have previously been used as antifoam agents. The venting time is generally considered worse with the addition of additives, especially antifoaming agents such as silicone oil. This is described in “Properties on Foam in Lubricating Oils”, pages 9-13, May 2003, Lubricating Engineering, Journal of the Society of Tribologists and Lubrications.

高せん断ミキサーを用いたアルキルアクリレートポリマーの潤滑油中への組み込みが、潤滑油の放気性に影響することは驚きである。本発明を用いて、潤滑油の放気を向上させるために、当業者はアルキルアクリレートポリマーを使用し得る。   It is surprising that the incorporation of alkyl acrylate polymers into the lubricating oil using a high shear mixer affects the air release of the lubricating oil. Using the present invention, one of ordinary skill in the art can use alkyl acrylate polymers to improve the release of lubricating oil.

本発明は、ＡＳＴＭ Ｄ３４２７によって計測される潤滑油の放気を向上させる方法を提供する。試験において、圧縮された空気を、５０℃の温度まで熱された潤滑油中に吹き込む。気流を止めた後、油に混入した空気が体積の０．２％まで低減するために必要とされる時間を、放気時間として記録する。望ましい放気の数値は、一般的に３分未満、好ましくは６０秒未満、最も好ましくは２０秒未満である。   The present invention provides a method for improving the release of lubricating oil as measured by ASTM D3427. In the test, compressed air is blown into a lubricating oil heated to a temperature of 50 ° C. After the air flow is stopped, the time required for the air mixed into the oil to be reduced to 0.2% of the volume is recorded as the venting time. Desirable venting values are generally less than 3 minutes, preferably less than 60 seconds, and most preferably less than 20 seconds.

放気は、高せん断ミキサーを用いて添加剤が潤滑油と混合されていない潤滑油を用いて達成される放気と比較して、向上する。本発明者らは、本発明の方法を実行したとき、放気時間の有用な低減を認めた。   The venting is improved compared to the venting achieved using a high shear mixer and a lubricating oil in which the additive is not mixed with the lubricating oil. The inventors have found a useful reduction in venting time when carrying out the method of the invention.

潤滑油は、いくつかの基油の混合物であり得る基油成分を含む。基油成分中の基油は、ＡＰＩ（Ａｍｅｒｉｃａｎ Ｐｅｔｒｏｌｅｕｍ Ｉｎｓｔｉｔｕｔｅ）基油分類のグループＩ、ＩＩ、ＩＩＩ、ＩＶ、またはＶから選択される任意の従来の基油であり得る。好ましくは基油成分はＧＴＬ基油を含み、さらに好ましくは基油成分は基油成分の重量に基づいて少なくとも７５重量％のＧＴＬ基油を含む。ＧＴＬ基油は、天然ガスを液体燃料に変えるフィッシャー・トロプシュ法により合成される。ＧＴＬ基油は、原油から精製される鉱油基油と比較して非常に低い硫黄含有量及び芳香族含有量を有し、非常に高いパラフィン組成比を有する。   The lubricating oil includes a base oil component that can be a mixture of several base oils. The base oil in the base oil component can be any conventional base oil selected from Group I, II, III, IV, or V of the API (American Petroleum Institute) base oil classification. Preferably the base oil component comprises a GTL base oil, more preferably the base oil component comprises at least 75% by weight GTL base oil based on the weight of the base oil component. GTL base oil is synthesized by the Fischer-Tropsch process, which converts natural gas into liquid fuel. GTL base oils have very low sulfur and aromatic content compared to mineral oil base oils refined from crude oil, and have a very high paraffin composition ratio.

潤滑油は、添加剤を好適に含む。好ましくは添加剤の量は潤滑油の重量に基づいて１０重量％未満であり、さらに好ましくは５重量％未満であり、最も好ましくは２．５重量％未満である。添加剤は、抗酸化剤、耐摩耗添加剤、解乳化剤、乳化剤、サビ及び腐食抑止剤、粘度指数向上剤、ならびに／または摩擦調整剤を含み得る。   The lubricating oil preferably contains an additive. Preferably the amount of additive is less than 10% by weight, more preferably less than 5% by weight, and most preferably less than 2.5% by weight, based on the weight of the lubricating oil. Additives can include antioxidants, antiwear additives, demulsifiers, emulsifiers, rust and corrosion inhibitors, viscosity index improvers, and / or friction modifiers.

好ましくは潤滑油は４０℃で５〜２２０ｃＳｔの範囲の動粘度を有し、さらに好ましくは１０〜２００ｃＳｔであり、最も好ましくは２０〜１００ｃＳｔである。動粘度は、ＡＳＴＭ Ｄ４４５（ＡＳＴＭ Ｄ７０４２）を用いて好適に計測される。   Preferably the lubricating oil has a kinematic viscosity in the range of 5-220 cSt at 40 ° C., more preferably 10-200 cSt, most preferably 20-100 cSt. The kinematic viscosity is preferably measured using ASTM D445 (ASTM D7042).

本発明の好ましい実施形態において、前記潤滑油は、油圧流体用に配合される。油圧流体は、多くの異なる種類の油圧装置で使用され、機械の動きを滑らかにするためだけでなく、圧力を伝達するために使用される。空気混入は、油圧のふわふわとしたまたは不規則な動作の原因となり、油圧系内で著しい問題になり得る。   In a preferred embodiment of the present invention, the lubricating oil is formulated for a hydraulic fluid. Hydraulic fluid is used in many different types of hydraulic devices and is used not only to smooth the movement of the machine but also to transmit pressure. Aeration can cause hydraulic fluffy or irregular operation and can be a significant problem in hydraulic systems.

本発明の方法において、アルキルアクリレートポリマー添加物は、潤滑油中に混合される。好適なアルキルアクリレートポリマーは、例えば、ＵＳ３１６６５０８において開示される。ポリマーの分子量は、好適には１０，０００未満、好ましくは７，５００未満、さらに好ましくは５，０００未満である。一実施形態において、アルキルアクリレートポリマーは、アルキルラジカル中に少なくとも３つであるが７つ未満の炭素原子を有するアルキルアクリレートのホモポリマーであり得る。別の実施形態において、アルキルアクリレートポリマーは、アルキルラジカルが１〜１８の炭素原子を有し、コポリマー分子のアルキルラジカル中における炭素原子の平均数がモル基準で少なくとも３つであるが７つ未満である、少なくとも２つの異なるアルキルアクリレートのコポリマーであり得る。   In the process of the present invention, the alkyl acrylate polymer additive is mixed into the lubricating oil. Suitable alkyl acrylate polymers are disclosed, for example, in US Pat. No. 3,166,508. The molecular weight of the polymer is suitably less than 10,000, preferably less than 7,500, more preferably less than 5,000. In one embodiment, the alkyl acrylate polymer may be a homopolymer of an alkyl acrylate having at least 3 but less than 7 carbon atoms in the alkyl radical. In another embodiment, the alkyl acrylate polymer has an alkyl radical having from 1 to 18 carbon atoms, and the average number of carbon atoms in the alkyl radical of the copolymer molecule is at least 3, but less than 7, on a molar basis. It can be a copolymer of at least two different alkyl acrylates.

好適には潤滑油の重量に基づいて少なくとも０．０００５重量％のアルキルアクリレートポリマーが潤滑油中に混合され、好ましくは少なくとも０．００１重量％である。好適には潤滑油の重量に基づいて０．１重量％未満のアルキルアクリレートポリマーが潤滑油中に混合され、好ましくは０．０１重量％未満である。好ましい量のアルキルアクリレートポリマーは、放気性において所望の向上を達成するため十分に使用することと、アルキルアクリレートポリマーを使用し過ぎたことによる不必要な出費を避けることとの均衡である。   Suitably at least 0.0005% by weight of alkyl acrylate polymer based on the weight of the lubricating oil is mixed in the lubricating oil, preferably at least 0.001% by weight. Suitably less than 0.1% by weight of alkyl acrylate polymer, based on the weight of the lubricating oil, is mixed in the lubricating oil, preferably less than 0.01% by weight. The preferred amount of alkyl acrylate polymer is a balance between full use to achieve the desired improvement in air release and avoiding unnecessary expense due to overuse of the alkyl acrylate polymer.

アルキルアクリレートポリマー添加物は、高せん断ミキサーを用いて潤滑油中に混合される。用語「高せん断ミキサー」は、当業者に周知のものである。回転するインペラまたは高速ロータは、混合される液体中に流れ及びせん断を作り出す。いくつかの実施形態において、ロータは固定子として知られる静止構成要素内で回転する。好ましくは、添加剤は少なくとも４００ｒｐｍの速度で潤滑油中に混合される。速度は、好ましくは少なくとも６００ｒｐｍ、さらに好ましくは少なくとも８００ｒｐｍである。好ましくは混合は少なくとも１０分間、さらに好ましくは少なくとも３０分間、最も好ましくは少なくとも６０分間である。   The alkyl acrylate polymer additive is mixed into the lubricating oil using a high shear mixer. The term “high shear mixer” is well known to those skilled in the art. A rotating impeller or high speed rotor creates flow and shear in the mixed liquid. In some embodiments, the rotor rotates in a stationary component known as a stator. Preferably, the additive is mixed into the lubricating oil at a speed of at least 400 rpm. The speed is preferably at least 600 rpm, more preferably at least 800 rpm. Preferably mixing is at least 10 minutes, more preferably at least 30 minutes, most preferably at least 60 minutes.

本発明は、実施例という形により下記でさらに詳細に説明されるが、本発明はそれらの実施例によって決して限定されない。   The invention is explained in more detail below by way of examples, but the invention is in no way limited by these examples.

７の異なる基油混合物を、以下の３つの基油の組み合わせを用いて調製した。
１）Ｃｈｅｖｒｏｎ ２２０ Ｒ（Ｃｈｅｖｒｏｎから入手可能なグループＩＩの鉱油）
２）ＸＨＶＩ ８（Ｓｈｅｌｌから入手可能なフィッシャー・トロプシュ派生油）
３）Ｓｐｅｃｔｒａｓｙｎ ８（ＥｘｘｏｎＭｏｂｉｌから入手可能なポリアルファオレフィン流体） Seven different base oil mixtures were prepared using the following three base oil combinations.
1) Chevron 220 R (Group II mineral oil available from Chevron)
2) XHVI 8 (Fischer-Tropsch derived oil available from Shell)
3) Spectrasyn 8 (polyalphaolefin fluid available from ExxonMobil)

表１は、（混合物の総量に基づいた質量％で表示された）各混合物に存在する各基油の量を示す。表１の混合物は全てＩＳＯ ４６である。

Figure 2018535307
Table 1 shows the amount of each base oil present in each mixture (expressed in mass% based on the total amount of the mixture). All mixtures in Table 1 are ISO 46.
Figure 2018535307

極圧／耐摩耗添加剤、摩擦調整剤、無灰系サビ防止剤、乳化剤、及び抗酸化剤を含有する添加剤パッケージを、完全に配合された潤滑油を提供するために基油混合物に添加した。添加剤パッケージは各例において同様であった。その後、炭化水素溶剤中の変性アクリルポリマーの４０％溶液であるＰＣ ３１４４添加剤（Ａｌｌｎｅｘから入手可能）の１２５ｐｐｍを、４０℃で、１２００ｒｐｍの撹拌速度でオーバーヘッドＣａｆｒａｍｏ高せん断ミキサーを使って１時間または３００ｒｐｍの撹拌速度で磁気撹拌器を使って１時間のいずれかによって、配合物に加えた。   Additive packages containing extreme pressure / antiwear additives, friction modifiers, ashless rust inhibitors, emulsifiers, and antioxidants are added to the base oil mixture to provide a fully formulated lubricant did. The additive package was similar in each example. Thereafter, 125 ppm of PC 3144 additive (available from Allnex), a 40% solution of modified acrylic polymer in a hydrocarbon solvent, was added at 40 ° C. for 1 hour using an overhead Caframo high shear mixer at a stirring speed of 1200 rpm. Added to the formulation either at 1 hour using a magnetic stirrer with a stirring speed of 300 rpm.

基油混合物、完全に配合製された油、及び完全に配合された油にＰＣ ３１４４を足したものの放気時間が、ＡＳＴＭ Ｄ３４２７の方法を用いて試験された。評価結果を表２に示す。

Figure 2018535307
The air release time of the base oil mixture, the fully formulated oil, and the fully formulated oil plus PC 3144 was tested using the method of ASTM D3427. The evaluation results are shown in Table 2.
Figure 2018535307

結果は、基油混合物の放気が様々であることを示す。添加剤パッケージを添加することは、放気時間をさらに増やし得る。ＰＣ ３１４４添加剤を高せん断ミキサーを用いて添加することは、（放気時間が混合物３及び混合物７の場合のように既に非常に低くない限り）概ね放気時間を低減し得る。ＰＣ ３１４４添加剤を磁気撹拌器で添加することが、同様の効果を有するようには見られない。   The results show that the base oil mixture has a variety of venting. Adding an additive package can further increase the venting time. Adding the PC 3144 additive using a high shear mixer can generally reduce the venting time (unless the venting time is already very low as in Mixture 3 and Mixture 7). The addition of PC 3144 additive with a magnetic stirrer does not appear to have a similar effect.

Claims (9)

ＡＳＴＭ Ｄ３４２７によって計測される潤滑油の放気を向上させる方法であって、前記方法は、高せん断ミキサーを用いて、添加剤を前記潤滑油中に混合することを含み、前記添加剤はアルキルアクリレートポリマーである、方法。   A method for improving the venting of a lubricating oil as measured by ASTM D3427, wherein the method comprises mixing an additive into the lubricating oil using a high shear mixer, the additive comprising an alkyl acrylate A method that is a polymer. 前記潤滑油は、基油成分を含み、前記基油成分は、前記基油成分の重量に基づいて少なくとも７５重量％のＧＴＬ基油を含む、請求項１に記載の方法。   The method of claim 1, wherein the lubricating oil comprises a base oil component, and the base oil component comprises at least 75 wt% GTL base oil based on the weight of the base oil component. 前記潤滑油は、４０℃で５〜２２０ｃＳｔの範囲の動粘度を有する、請求項１または２に記載の方法。   The method according to claim 1 or 2, wherein the lubricating oil has a kinematic viscosity in the range of 5 to 220 cSt at 40C. 前記潤滑油は、油圧流体用に配合される、請求項１〜３のいずれか一項に記載の方法。   The method according to claim 1, wherein the lubricating oil is formulated for a hydraulic fluid. 前記アルキルアクリレートポリマーの分子量は、１０，０００未満である、請求項１〜４のいずれか一項に記載の方法。   The method according to claim 1, wherein the molecular weight of the alkyl acrylate polymer is less than 10,000. 前記アルキルアクリレートポリマーは、アルキルラジカル中に少なくとも３つであるが７つ未満の炭素原子を有するアルキルアクリレートのホモポリマーであるか、または、前記アルキルアクリレートポリマーは、前記アルキルラジカルが１〜１８の炭素原子を有し、前記コポリマー分子の前記アルキルラジカル中における炭素原子の平均数が、モル基準で少なくとも３つであるが７つ未満である、少なくとも２つの異なるアルキルアクリレートのコポリマーである、請求項１〜５のいずれか一項に記載の方法。   The alkyl acrylate polymer is a homopolymer of an alkyl acrylate having at least 3 but less than 7 carbon atoms in the alkyl radical, or the alkyl acrylate polymer is a carbon having 1-18 carbons in the alkyl radical. 2. A copolymer of at least two different alkyl acrylates having atoms and wherein the average number of carbon atoms in the alkyl radical of the copolymer molecule is at least 3 but less than 7 on a molar basis. The method as described in any one of -5. 前記潤滑油の重量に基づいて少なくとも０．０００５重量％かつ０．１重量％未満のアルキルアクリレートポリマーが、前記潤滑油中に混合される、請求項１〜６のいずれか一項に記載の方法。   7. The method of any one of claims 1-6, wherein at least 0.0005 wt% and less than 0.1 wt% alkyl acrylate polymer based on the weight of the lubricating oil is mixed into the lubricating oil. . 前記添加剤は、少なくとも４００ｒｐｍの速度で前記潤滑油中に混合される、請求項１〜７のいずれか一項に記載の方法。   The method according to any one of claims 1 to 7, wherein the additive is mixed into the lubricating oil at a speed of at least 400 rpm. 前記添加剤は、少なくとも８００ｒｐｍの速度で前記潤滑油中に混合される、請求項１〜８のいずれか一項に記載の方法。   9. A method according to any one of the preceding claims, wherein the additive is mixed into the lubricating oil at a speed of at least 800 rpm.
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