JPH04258694A - Gear oil composition for vehicle - Google Patents
Gear oil composition for vehicleInfo
- Publication number
- JPH04258694A JPH04258694A JP3892591A JP3892591A JPH04258694A JP H04258694 A JPH04258694 A JP H04258694A JP 3892591 A JP3892591 A JP 3892591A JP 3892591 A JP3892591 A JP 3892591A JP H04258694 A JPH04258694 A JP H04258694A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- alkali metal
- gear
- present
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 42
- 239000012208 gear oil Substances 0.000 title claims description 22
- -1 alkaline earth metal salts Chemical class 0.000 claims abstract description 25
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 18
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 13
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims abstract description 7
- 239000002253 acid Substances 0.000 claims abstract description 6
- 239000002199 base oil Substances 0.000 claims abstract description 6
- 125000004432 carbon atom Chemical group C* 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 abstract description 10
- 238000007254 oxidation reaction Methods 0.000 abstract description 10
- 238000002156 mixing Methods 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract 1
- 150000007513 acids Chemical class 0.000 abstract 1
- 239000000470 constituent Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- 239000011575 calcium Substances 0.000 description 6
- 239000002270 dispersing agent Substances 0.000 description 6
- 230000007935 neutral effect Effects 0.000 description 6
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 5
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 5
- 239000000654 additive Substances 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 238000004821 distillation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- QCJQWJKKTGJDCM-UHFFFAOYSA-N [P].[S] Chemical compound [P].[S] QCJQWJKKTGJDCM-UHFFFAOYSA-N 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000010689 synthetic lubricating oil Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
- 239000003599 detergent Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 229960002317 succinimide Drugs 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- WUUHFRRPHJEEKV-UHFFFAOYSA-N tripotassium borate Chemical compound [K+].[K+].[K+].[O-]B([O-])[O-] WUUHFRRPHJEEKV-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
- 125000005910 alkyl carbonate group Chemical group 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- 229920013639 polyalphaolefin Polymers 0.000 description 2
- 229920000193 polymethacrylate Polymers 0.000 description 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- 239000007818 Grignard reagent Substances 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 description 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 150000001350 alkyl halides Chemical class 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 150000005690 diesters Chemical class 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000002272 engine oil additive Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 150000004795 grignard reagents Chemical class 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- XPXMKIXDFWLRAA-UHFFFAOYSA-N hydrazinide Chemical compound [NH-]N XPXMKIXDFWLRAA-UHFFFAOYSA-N 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 150000004668 long chain fatty acids Chemical class 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010688 mineral lubricating oil Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000005078 molybdenum compound Substances 0.000 description 1
- 150000002752 molybdenum compounds Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- HUNGQTAXBUKZGQ-UHFFFAOYSA-N tripotassium borate hydrate Chemical compound O.[K+].[K+].[K+].[O-]B([O-])[O-] HUNGQTAXBUKZGQ-UHFFFAOYSA-N 0.000 description 1
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 1
- WMYJOZQKDZZHAC-UHFFFAOYSA-H trizinc;dioxido-sulfanylidene-sulfido-$l^{5}-phosphane Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S WMYJOZQKDZZHAC-UHFFFAOYSA-H 0.000 description 1
- 239000007762 w/o emulsion Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Landscapes
- Lubricants (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は高温条件下の使用に耐え
得る、更に詳しくは熱安定性、高温酸化安定性、耐摩耗
性を改善させた乗用車、トラック、バスなどの大型車、
鉄道、トラクターなどを包含する車両用ギヤ油組成物に
関する。[Industrial Application Field] The present invention relates to large vehicles such as passenger cars, trucks, and buses that can withstand use under high-temperature conditions, and more specifically, have improved thermal stability, high-temperature oxidation stability, and wear resistance.
The present invention relates to a gear oil composition for vehicles including railways, tractors, etc.
【０００２】0002
【従来の技術】乗用車、トラック、バスなどの大型車を
始め、鉄道、トラクターなどの車両では部品の点数が少
なく安価であり、また動力の伝達が確実である歯車式動
力伝達装置が古くから採用されて来た。[Prior Art] Large vehicles such as passenger cars, trucks, and buses, as well as vehicles such as trains and tractors, have long used gear-type power transmission devices, which have a small number of parts, are inexpensive, and provide reliable power transmission. I've been
【０００３】ギヤ油はこの歯車装置の潤滑剤の代表的な
ものであり、歯面と歯面の間に油膜を形成させ摩擦を低
減し動力伝達能力を高める、摩耗あるいは焼き付き、ピ
ッチング、スコーリングなどの歯面損傷を抑制し、装置
寿命を向上させる事を目的とし使用される。そのため、
耐摩耗性、極圧性などが重要な要求性能として従来から
掲げられてきた。そして係る要求により、ギヤ油には金
属表面と反応し、あるいは分解生成物をつくり、表面化
学反応膜を形成するような添加剤処方が望まれ、長い間
硫化オレフィン、リン酸エステルに代表される硫黄−リ
ン系添加剤が主流として用いられてきた。Gear oil is a typical lubricant for gear devices, and forms an oil film between tooth surfaces to reduce friction and increase power transmission ability, preventing wear, seizure, pitting, and scoring. It is used for the purpose of suppressing tooth surface damage such as, and improving the life of the equipment. Therefore,
Wear resistance, extreme pressure resistance, etc. have traditionally been cited as important performance requirements. In response to these demands, it has been desired that gear oils have additive formulations that react with metal surfaces or create decomposition products to form chemical reaction films on the surface. Sulfur-phosphorus additives have been mainly used.
【０００４】ところが近年は、省燃費指向からくる装置
の小型化、あるいは高速道路網の整備など高速走行化に
伴う高出力化などが進み、車両を用途とするギヤ油の使
用条件は苛酷の一途をたどっている。中でも油温上昇に
よるギヤ油の劣化の影響は大きく、従来の硫黄−リン系
添加剤を使用したギヤ油では硫黄−リン系添加剤が熱に
より酸化分解し、スラッジの発生、摩耗量の増大などが
避けられなくなった。また、硫黄−リン系ギヤ油より耐
熱性を向上させたギヤ油、すなわちジチオリン酸亜鉛や
Ｃａスルフォネートに代表されるエンジン油系添加剤を
使用したギヤ油もあるが、上記問題点を解決するまでに
は至っていない。一方、特開昭６２−２４０３８５号で
はポリα−オレフィンを用いた潤滑油組成物が、特開昭
６２−２０１９９５号ではポリグリコールを用いたギヤ
油組成物が開示されているが、これらの合成潤滑油の利
用は高温清浄性が悪いなどの欠点が残っているばかりで
なく、高価であり依然要求性能を満足するものではない
。また、特公昭５４−２２２０１号ではホウ酸塩含有潤
滑剤による耐摩耗性、極圧性の改善について開示がなさ
れているが、油温上昇による潤滑剤の劣化抑制について
は直接的改善策を講じていない。However, in recent years, the use conditions of gear oil for vehicles have become increasingly severe due to the miniaturization of equipment due to the desire to save fuel consumption and the increase in output due to high-speed driving due to the development of expressway networks. is following. Above all, gear oil deterioration due to oil temperature rises has a large effect, and in conventional gear oils that use sulfur-phosphorus additives, the sulfur-phosphorus additives are oxidized and decomposed by heat, causing sludge generation and increased wear. became unavoidable. There are also gear oils that have improved heat resistance than sulfur-phosphorus gear oils, that is, gear oils that use engine oil additives such as zinc dithiophosphate and Ca sulfonate, but until the above problems are solved. This has not yet been achieved. On the other hand, JP-A No. 62-240385 discloses a lubricating oil composition using poly-α-olefin, and JP-A No. 62-201995 discloses a gear oil composition using polyglycol. The use of lubricating oil not only has drawbacks such as poor high-temperature cleanliness, but also is expensive and still does not satisfy the required performance. Furthermore, although Japanese Patent Publication No. 54-22201 discloses improvements in wear resistance and extreme pressure properties using borate-containing lubricants, no direct improvement measures have been taken to suppress deterioration of lubricants due to increases in oil temperature. do not have.
【０００５】[0005]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、近年益々厳しくなる苛酷な高温条件下にお
いても優れた熱安定性、酸化安定性、耐摩耗性を有する
車両用ギヤ油組成物を提供することにある。[Problems to be Solved by the Invention] The problem to be solved by the present invention is to provide a gear oil composition for vehicles that has excellent thermal stability, oxidation stability, and wear resistance even under severe high-temperature conditions that have become increasingly severe in recent years. It's about providing things.
【０００６】[0006]
【課題を解決するための手段】本発明者等は、上記の課
題を解決するため鋭意検討を重ねた結果、特定の基油に
ヒドロキシアルキル安息香酸および／またはアルキルフ
ェノールのアルカリ土類金属塩硫化混合物（以下、ヒド
ロキシベンゾエート・フェネート硫化混合物という。）
とジアルキルカーボネートおよびアルカリ金属ホウ酸塩
水和物を特定量配合すれば高温条件下において相乗効果
的に優れた熱安定性、酸化安定性、耐摩耗性を有するこ
とを見い出し、本発明を完成するに至った。[Means for Solving the Problems] As a result of intensive studies to solve the above problems, the present inventors have developed an alkaline earth metal salt sulfurized mixture of hydroxyalkylbenzoic acid and/or alkylphenol in a specific base oil. (Hereinafter referred to as hydroxybenzoate/phenate sulfide mixture.)
It has been discovered that by blending a specific amount of dialkyl carbonate, dialkyl carbonate, and alkali metal borate hydrate, synergistically excellent thermal stability, oxidation stability, and wear resistance can be achieved under high-temperature conditions, and in order to complete the present invention. It's arrived.
【０００７】即ち、本発明の要旨は、１００℃で２〜５
０ｃＳｔの粘度を有する基油に、（Ａ）ヒドロキシベン
ゾエート・フェネート硫化混合物１〜１５重量％、（Ｂ
）一般式 Ｒ１−Ｏ−Ｃ（＝Ｏ）−Ｏ−Ｒ２ （こ
こで、Ｒ１、Ｒ２はともに炭素数５〜２０のアルキル基
である。）で表わされるジアルキルカーボネート５〜５
０重量、（Ｃ）アルカリ金属ホウ酸塩水和物０．１〜１
５重量％を必須成分として含有することを特徴とする車
両用ギヤ油組成物に関する。That is, the gist of the present invention is that 2 to 5
To a base oil having a viscosity of 0 cSt, (A) 1 to 15% by weight of a hydroxybenzoate phenate sulfur mixture, (B
) Dialkyl carbonate 5-5 represented by the general formula R1-O-C(=O)-O-R2 (where R1 and R2 are both alkyl groups having 5 to 20 carbon atoms)
0 weight, (C) alkali metal borate hydrate 0.1-1
The present invention relates to a gear oil composition for a vehicle, characterized in that it contains 5% by weight as an essential component.
【０００８】以下本発明を詳細に説明する。本発明に用
いる基油は１００℃における粘度が約２〜５０ｃＳｔ、
好ましくは約１０〜３０ｃＳｔの鉱物性潤滑油またはそ
の精製品（以下、鉱油という。）または合成潤滑油ある
いはこれらの混合物である。The present invention will be explained in detail below. The base oil used in the present invention has a viscosity of about 2 to 50 cSt at 100°C,
Preferably, it is a mineral lubricating oil of about 10 to 30 cSt, a refined product thereof (hereinafter referred to as mineral oil), a synthetic lubricating oil, or a mixture thereof.
【０００９】本発明組成物の必須成分の一つである（Ａ
）ヒドロキシベンゾエート・フェネート硫化混合物の例
は、フェノール類、二価アルコールおよびフェノール類
に対するグラム当量比が０．９９以下のアルカリ土類金
属の酸化物もしくは水酸化物またはそれらの混合物より
なる反応原料混合物を反応させ、次いで水および金属試
薬１モル当たり０．６モル以下になるまで二価アルコー
ルを留去し、得られた蒸留塔底物に二酸化炭素を反応さ
せ、得られた生成物に金属試薬１モル当たり０．１〜４
．０モルの元素硫黄を反応させて得られるもので、特開
昭６４−２９３５４号に詳しい。このヒドロキシベンゾ
エート・フェネート硫化混合物の配合量は約１〜１５重
量％、好ましくは約３〜１０重量％である。[0009] One of the essential components of the composition of the present invention (A
) An example of a hydroxybenzoate/phenate sulfurized mixture is a reaction raw material mixture consisting of phenols, dihydric alcohols, alkaline earth metal oxides or hydroxides having a gram equivalent ratio to phenols of 0.99 or less, or mixtures thereof. The dihydric alcohol is then distilled off until the dihydric alcohol is reduced to 0.6 mole or less per mole of water and metal reagent, and the resulting distillation column bottom is reacted with carbon dioxide. 0.1-4 per mole
．． It is obtained by reacting 0 mol of elemental sulfur, and is detailed in JP-A-64-29354. The amount of the hydroxybenzoate-phenate sulfurized mixture is about 1 to 15% by weight, preferably about 3 to 10% by weight.
【００１０】また、（Ｂ）一般式 Ｒ１−Ｏ−Ｃ（＝
Ｏ）−Ｏ−Ｒ２ （ここでＲ１、Ｒ２はともに炭素数
５〜２０のアルキル基である。）で表わされるジアルキ
ルカーボネートは、グリニャール試薬を用いたアルコー
ルとケトンとの反応、塩化カルボニルとアルコールとの
反応、あるいはハロゲン化アルキルと炭酸塩との反応な
ど公知の方法によって製造することができる。本発明の
ジアルキルカーボネートのアルキル基の炭素数は５〜２
０、好ましくは炭素数１２〜２０である。このアルキル
基は直鎖であっても分岐であっても良いが、炭素数が少
な過ぎても多過ぎても熱安定性、高温酸化安定性が悪く
なり好ましくない。このジアルキルカーボネートの配合
量は約５〜５０重量％、好ましくは約１０〜３０重量％
である。[0010] Furthermore, (B) general formula R1-O-C (=
The dialkyl carbonate represented by O)-O-R2 (both R1 and R2 are alkyl groups having 5 to 20 carbon atoms) can be obtained by the reaction of an alcohol with a ketone using a Grignard reagent, or the reaction of carbonyl chloride with an alcohol. It can be produced by a known method such as reaction or reaction of an alkyl halide with a carbonate. The number of carbon atoms in the alkyl group of the dialkyl carbonate of the present invention is 5 to 2.
0, preferably 12 to 20 carbon atoms. This alkyl group may be linear or branched, but if the number of carbon atoms is too small or too large, thermal stability and high temperature oxidation stability will deteriorate, which is not preferable. The amount of this dialkyl carbonate is about 5 to 50% by weight, preferably about 10 to 30% by weight.
It is.
【００１１】更に本発明の（Ｃ）アルカリ金属ホウ酸塩
水和物は、例えば特公昭５３−９７６３号および米国特
許第３９２９６５０号に開示されている方法により製造
することが出来るFurthermore, the alkali metal borate hydrate (C) of the present invention can be produced, for example, by the method disclosed in Japanese Patent Publication No. 53-9763 and US Pat. No. 3,929,650.
【００１２】すなわち、本発明において使用するアルカ
リ金属ホウ酸塩水和物はアルカリ金属がカリウムの場合
、ホウ酸／カリウムの比が原子比基準で２．０〜４．５
となる割合で水酸化カリウムおよびホウ酸を含む水溶液
を中性アルカリ土類金属スルフォネートおよび／または
コハク酸イミド系無灰型分散剤を含む油溶液に加え、激
しく攪拌して油中水型エマルジョンを作り、それを脱水
して得たホウ酸カリウム水和物の微粒子分散体を用いる
ことが出来る。That is, when the alkali metal is potassium, the alkali metal borate hydrate used in the present invention has a boric acid/potassium ratio of 2.0 to 4.5 on an atomic ratio basis.
Add an aqueous solution containing potassium hydroxide and boric acid in the ratio to an oil solution containing a neutral alkaline earth metal sulfonate and/or succinimide ashless dispersant, and stir vigorously to form a water-in-oil emulsion. A fine particle dispersion of potassium borate hydrate obtained by preparing and dehydrating it can be used.
【００１３】更に別の方法として、アルカリ金属または
アルカリ土類金属中性スルフォネートをアルカリ金属水
酸化物の存在下において炭酸化して超塩基性スルフォネ
ートを得、これにホウ酸を反応させたアルカリ金属ホウ
酸塩の微粒子分散体を用いることも出来る。この場合、
炭酸化反応の際コハク酸イミドのような無灰型分散剤を
共存させる場合もある。In yet another method, an alkali metal or alkaline earth metal neutral sulfonate is carbonated in the presence of an alkali metal hydroxide to obtain a superbasic sulfonate, which is then reacted with an alkali metal boron. Fine particle dispersions of acid salts can also be used. in this case,
An ashless dispersant such as succinimide may be present during the carbonation reaction.
【００１４】本発明のアルカリ金属ホウ酸塩水和物とし
てより好ましくは、中性カルシウムスルフォネートおよ
びコハク酸イミドなどの無灰型分散剤の存在下で製造さ
れたホウ酸カリウムまたはホウ酸ナトリウム分散体を挙
げることができ、これらの方法で得られたアルカリ金属
ホウ酸塩水和物は例えば次式で表わされるようなもので
ある。
Ｋ２Ｏ・３Ｂ２Ｏ３・３．２Ｈ２ＯまたはＮａ２Ｏ・Ｂ
２Ｏ３・２．０Ｈ２Ｏ
本発明組成物に対するこのアルカリ金属ホウ酸塩水和物
の配合量は約０．１〜１５重量％、好ましくは約０．５
〜１０重量％である。More preferably, the alkali metal borate hydrate of the present invention is a potassium or sodium borate dispersion prepared in the presence of a neutral calcium sulfonate and an ashless type dispersant such as succinimide. For example, the alkali metal borate hydrate obtained by these methods is represented by the following formula. K2O・3B2O3・3.2H2O or Na2O・B
2O3.2.0H2O The amount of this alkali metal borate hydrate in the composition of the present invention is about 0.1 to 15% by weight, preferably about 0.5% by weight.
~10% by weight.
【００１５】本発明による車両用ギヤ油組成物において
、ヒドロキシベンゾエート・フェネート硫化混合物、ジ
アルキルカーボネートおよびアルカリ金属ホウ酸塩水和
物はいずれも配合量が少な過ぎるとその効果は弱くなり
、熱安定性、高温酸化安定性、耐摩耗性のいずれも悪く
なる。また配合量が多過ぎてもコスト的に高くなり不利
である。In the vehicle gear oil composition according to the present invention, if the amounts of the hydroxybenzoate/phenate sulfurized mixture, dialkyl carbonate, and alkali metal borate hydrate are too small, their effects will be weakened, resulting in poor thermal stability and Both high temperature oxidation stability and wear resistance deteriorate. Also, if the amount is too large, the cost will increase, which is disadvantageous.
【００１６】本発明の車両用ギヤ油組成物は、ヒドロキ
シベンゾエート・フェネート硫化混合物、アルキルカー
ボネートおよびアルカリ金属ホウ酸塩水和物を特定量配
合させたため、その作用の詳細は明らかではないが、三
者が相乗効果的に作用し、熱安定性、高温酸化安定性、
耐摩耗性を向上させているものと推察される。The gear oil composition for vehicles of the present invention contains specific amounts of a hydroxybenzoate/phenate sulfide mixture, an alkyl carbonate, and an alkali metal borate hydrate, so although the details of their effects are not clear, the three act synergistically to improve thermal stability, high-temperature oxidation stability,
It is presumed that this improves wear resistance.
【００１７】すなわち、歯車式動力伝達装置の摺動面は
電荷を持つ。アルカリ金属ホウ酸塩はその金属面上に電
気的に物理吸着し、厚い油膜を形成する。この油膜によ
り摩耗を防止するとともに、ヒドロキシベンゾエート・
フェネート硫化混合物とアルキルカーボネートが更に物
理的、化学的作用を生じ、アルカリ金属ホウ酸塩水和物
と結び付きあるいは油中に分散し、相乗効果的に耐摩耗
性能を向上させ苛酷な使用条件下においても熱分解物、
酸化劣化物の生成を抑制させることなどが考えられる。That is, the sliding surface of the gear type power transmission device has an electric charge. Alkali metal borates are electrically physically adsorbed onto the metal surface, forming a thick oil film. This oil film prevents wear and hydroxybenzoate
The phenate sulfide mixture and the alkyl carbonate further produce physical and chemical effects, bonding with the alkali metal borate hydrate or dispersing in the oil, synergistically improving the wear resistance performance even under severe usage conditions. pyrolysis product,
It is possible to suppress the generation of oxidized deterioration products.
【００１８】本発明の車両用ギヤ油組成物は、前記した
三種の化合物を必須成分とするが、これらの他にも必要
に応じて更に公知の添加剤、例えば金属型清浄剤、無灰
型分散剤、摩耗防止剤、摩擦調整剤、酸化防止剤、腐蝕
防止剤、粘度指数向上剤、流動点降下剤並びに消泡剤な
どを含有しても良い。金属型清浄剤としては、アルカリ
土類金属スルフォネート、アルカリ土類金属フェネート
などが挙げられる。無灰型分散剤としては、アルケニル
コハク酸イミド、アルケニルコハク酸エステル、長鎖脂
肪酸とポリアミンとのアミド（アミノアミド型）などが
挙げられる。摩耗防止剤としては、ジアルキルジチオリ
ン酸亜鉛などが挙げられる。摩擦調整剤としては、脂肪
酸、有機モリブデン化合物などが挙げられる。酸化防止
剤としては、アミン系、フェノール系酸化防止剤などが
挙げられる。腐蝕防止剤としては、ベンゾトリアゾール
、アルケニルコハク酸エステルなどが挙げられる。粘度
指数向上剤としては、ポリメタクリレート、オレフィン
コポリマーなどが挙げられる。流動点降下剤としては、
ポリメタクリレートなどが挙げられる。消泡剤としては
、シリコン化合物、エステル系などが挙げられる。The vehicular gear oil composition of the present invention contains the above-mentioned three types of compounds as essential components, but in addition to these, known additives such as metal-type detergents, ashless-type It may contain a dispersant, an anti-wear agent, a friction modifier, an antioxidant, a corrosion inhibitor, a viscosity index improver, a pour point depressant, an antifoaming agent, and the like. Examples of metal type detergents include alkaline earth metal sulfonates and alkaline earth metal phenates. Examples of ashless dispersants include alkenyl succinimides, alkenyl succinic esters, and amides of long-chain fatty acids and polyamines (amino amide type). Examples of anti-wear agents include zinc dialkyldithiophosphate. Examples of friction modifiers include fatty acids and organic molybdenum compounds. Examples of the antioxidant include amine type antioxidants and phenolic type antioxidants. Corrosion inhibitors include benzotriazole, alkenyl succinate, and the like. Examples of viscosity index improvers include polymethacrylates and olefin copolymers. As a pour point depressant,
Examples include polymethacrylate. Examples of antifoaming agents include silicon compounds and esters.
【００１９】なお、本発明における「車両用」とは乗用
車、トラック、バス等の大型車、鉄道、トラクター等を
包含するものであり、歯車式動力伝達装置としては、ト
ランスミッションギヤ、ディファレンシャルギヤ等が挙
げられる。[0019] In the present invention, "vehicle use" includes large vehicles such as passenger cars, trucks and buses, trains, tractors, etc., and gear type power transmission devices include transmission gears, differential gears, etc. Can be mentioned.
【００２０】また、基油として合成潤滑油を用いる場合
の合成潤滑油基材としては、α−オレフィンオリゴマー
、ポリブテン、ジエステル、ポルオールエステル、アル
キルベンゼン等が用いられる。When a synthetic lubricating oil is used as the base oil, α-olefin oligomers, polybutenes, diesters, polyol esters, alkylbenzenes, etc. are used as the synthetic lubricating oil base material.
【００２１】[0021]
【実施例】以下、実施例、比較例および参考例により本
発明を説明するが、これらは単に例示であり、本発明は
これらによって制限されるものではない。下記参考例は
、本発明組成物に配合するヒドロキシベンゾエート・フ
ェネート硫化混合物およびホウ酸カリウムの３．２水和
物の製造例を示すものである。EXAMPLES The present invention will be explained below with reference to Examples, Comparative Examples and Reference Examples, but these are merely illustrative and the present invention is not limited thereto. The following reference example shows a production example of a hydroxybenzoate/phenate sulfurized mixture and potassium borate 3.2 hydrate to be incorporated into the composition of the present invention.
【００２２】参考例１
攪拌器、冷却管、窒素ガス導入管および温度計を装着し
た５ｌオートクレーブにノニルフェノール２３７９ｇ（
１０．８モル）、純度９８．４％の酸化カルシウム２０
５ｇ（３．６モル）を挿入し、攪拌した。この懸濁液に
、水２．８ｗｔ％を含むエチレングリコール３４５ｇ（
５．４モル）を窒素気流中６ｋｇ／ｃｍ２の加圧下、１
５５℃で添加し、これを１６０℃で３時間反応させた後
、該反応系を徐々に減圧しながら、添加水、生成水、添
加した大部分のエチレングリコールおよび一部のノニル
フェノールを留去することにより、カラシ色の液状の蒸
留残留物２３５８ｇが得られた。その際、終了時の塔底
物の温度は１８０℃、留出物温度は１６０℃（１１ｍｍ
Ｈｇ）であった。Reference Example 1 2379 g of nonylphenol (
10.8 mol), 98.4% pure calcium oxide 20
5 g (3.6 mol) was added and stirred. To this suspension, 345 g of ethylene glycol containing 2.8 wt% water (
5.4 mol) under a pressure of 6 kg/cm2 in a nitrogen stream, 1
After adding at 55°C and reacting at 160°C for 3 hours, the added water, produced water, most of the added ethylene glycol, and some nonylphenol are distilled off while gradually reducing the pressure of the reaction system. As a result, 2358 g of a mustard-colored liquid distillation residue was obtained. At that time, the temperature of the column bottom at the end was 180°C, and the distillate temperature was 160°C (11 mm
Hg).
【００２３】次に、該蒸留残留物２３５８ｇに１２０℃
、２２ｍｍＨｇの状態から２７５ｍｌ／ｍｉｎ（６ｋｇ
／ｃｍ）の流速で二酸化炭素を約０．６時間吹き込み圧
力を５．３ｋｇ／ｃｍ２とした。その後昇温して１７８
℃になってから二酸化炭素を再び吹き込み６ｋｇ／ｃｍ
２まで昇圧し、その状態で４時間保持して、暗い灰黄赤
色の液状反応生成物２５０８ｇを得た。この反応生成物
のカルシウム含有率は、５．７６ｗｔ％であった。なお
、この反応生成物２．００ｇを分液ロートに採り、６０
ｍｌのエーテルに溶解させ、１Ｎの硫酸１５ｍｌを添加
して加水分解し（振とう機６０分攪拌）、十分水洗後、
エーテル層を分離し、次いでエーテルをロータリーエバ
ポレーターにて除去したところ、褐色の液状物１．８８
ｇを得た。この液状物の酸価は６４ｍｇＫＯＨ／ｇであ
った。Next, 2358 g of the distillation residue was heated to 120°C.
, 275ml/min (6kg
Carbon dioxide was blown in for about 0.6 hours at a flow rate of 5.3 kg/cm2. After that, the temperature increased to 178
After the temperature reaches ℃, carbon dioxide is blown in again at 6 kg/cm.
The pressure was increased to 2 and maintained at that state for 4 hours to obtain 2508 g of a dark gray-yellow-red liquid reaction product. The calcium content of this reaction product was 5.76 wt%. In addition, 2.00 g of this reaction product was taken into a separating funnel, and 60
ml of ether, hydrolyzed by adding 15 ml of 1N sulfuric acid (stirred on a shaker for 60 minutes), and washed thoroughly with water.
The ether layer was separated, and the ether was removed using a rotary evaporator, resulting in a brown liquid of 1.88 g.
I got g. The acid value of this liquid was 64 mgKOH/g.
【００２４】次に、前記オートクレーブ中の二酸化炭素
処理生成物４１８ｇを１ｌオートクレーブに移し、硫黄
２３．１ｇ（０．７２モル）をＣＯ２気流中、常圧下に
１４９℃で添加し、次いで温度を１７８℃に、圧力をＣ
Ｏ２にて６ｋｇ／ｃｍ２に上げ、４時間その温度で攪拌
して、極暗い黄赤色の液状生成物４３６．４ｇを得た。
この生成物の酸価（上記と同様にして測定）は５３ｍｇ
ＫＯＨ／ｇであった。Next, 418 g of the carbon dioxide treatment product in the autoclave was transferred to a 1 liter autoclave, and 23.1 g (0.72 mol) of sulfur was added at 149°C under normal pressure in a CO2 stream, and then the temperature was increased to 178°C. ℃,pressure to C
The temperature was raised to 6 kg/cm2 with O2 and stirred at that temperature for 4 hours, yielding 436.4 g of a very dark yellow-red liquid product. The acid value of this product (measured in the same manner as above) is 53 mg.
KOH/g.
【００２５】１ｌ三つ口梨型フラスコに上記硫化反応生
成物３９２．３ｇと１５０ニュートラル油（１００℃の
粘度が５．３８ｃＳｔのパラフィン系潤滑油）１６５．
６ｇを封入し、大部分のノニルフェノールおよび少量の
潤滑油留分を留去して、蒸留残留物３３０．９ｇを得た
。
その際の最終留出物温度は１９０℃（２ｍｍＨｇ）であ
った。そして、この蒸留残留物中に含まれる極少量の不
溶解分をロ過により除去し、粘度１３１．３ｃＳｔ（＠
１００℃）、塩基価１７４ｍｇＫＯＨ／ｇ、カルシウム
量６．２０ｗｔ％、硫黄量３．３２ｗｔ％の極暗い黄赤
色透明粘稠な液状の最終製品３２８．７ｇを得た。392.3 g of the above sulfurization reaction product and 165.0 g of 150 neutral oil (paraffinic lubricating oil with a viscosity of 5.38 cSt at 100° C.) were placed in a 1 liter three-necked pear-shaped flask.
6 g was sealed, and most nonylphenol and a small amount of lubricating oil fraction were distilled off to obtain 330.9 g of distillation residue. The final distillate temperature at that time was 190° C. (2 mmHg). Then, a very small amount of undissolved matter contained in this distillation residue was removed by filtration, and the viscosity was 131.3 cSt (@
100°C), a base value of 174 mgKOH/g, a calcium content of 6.20 wt%, and a sulfur content of 3.32 wt%. 328.7 g of a very dark yellow-red transparent viscous liquid final product was obtained.
【００２６】参考例２
ニュートラル油９８ｇ、カルシウム約１．７％を含有す
る中性石油スルホン酸カルシウム３６ｇ、およびポリイ
ソブテニルコハク酸イミド分散剤１２ｇをガラス製フラ
スコに入れた。フラスコ内で混合後、さらにこの中へホ
ウ酸カリウム１１ｇを含有している水２００ｍｌを入れ
た。内容物を激しくかき混ぜて安定なエマルションを作
った。このエマルションを約１３５℃で脱水して生成物
２８０ｇを得た。これは、ホウ酸カリウム粒子中に残さ
れた水和水約３．２に相当し、次式で表わされた。
Ｋ２Ｏ・３Ｂ２Ｏ３・３．２Ｈ２ＯReference Example 2 98 g of neutral oil, 36 g of neutral petroleum calcium sulfonate containing about 1.7% calcium, and 12 g of polyisobutenylsuccinimide dispersant were placed in a glass flask. After mixing in the flask, 200 ml of water containing 11 g of potassium borate was further added into the flask. The contents were stirred vigorously to form a stable emulsion. This emulsion was dehydrated at about 135° C. to obtain 280 g of product. This corresponds to about 3.2 liters of water of hydration left in the potassium borate particles, and was expressed by the following formula: K2O・3B2O3・3.2H2O
【００２７】実施例１〜５、比較例１〜９表１、表２及
び表３に示すように、車両用ギヤ油組成物を調製した。
上記組成物の熱安定性の評価としてホットチューブ試験
を行った。ホットチューブ試験の概要は以下の通りであ
る。空気が送り込まれている２８０℃、３００℃又は３
２０℃に加熱したガラス管中に試料油が０．３ｍｌ／ｈ
ｒで注入される。注入された試料油はガラス管中を上下
しながら少しずつ上部出口から排出される。
１６時間後、ガラス管を取り出し、ノルマルヘキサンで
洗浄、乾燥してガラス管壁内に付着したラッカーの評点
付けをする。評点はラッカーが付着していない無色透明
を１０点、黒色不透明を０点とした。Examples 1 to 5 and Comparative Examples 1 to 9 Vehicle gear oil compositions were prepared as shown in Tables 1, 2, and 3. A hot tube test was conducted to evaluate the thermal stability of the above composition. The outline of the hot tube test is as follows. 280℃, 300℃ or 3 where air is pumped
Sample oil was added at 0.3 ml/h in a glass tube heated to 20°C.
Injected with r. The injected sample oil moves up and down in the glass tube and is gradually discharged from the upper outlet. After 16 hours, the glass tubes are removed, washed with n-hexane, dried and scored for lacquer adhering to the inside of the glass tube walls. The score was 10 for a colorless and transparent film with no lacquer attached, and 0 for a black and opaque film.
【００２８】また、酸化安定性の評価は内燃機関用潤滑
油酸化安定度試験法（ＪＩＳ Ｋ２５１４）に準拠し
、１７０℃、７２時間の条件で行った。The oxidation stability was evaluated in accordance with the oxidation stability test method for lubricating oils for internal combustion engines (JIS K2514) at 170° C. for 72 hours.
【００２９】更に、耐摩耗性の評価はシェル４球摩擦摩
耗試験機を用い、回転数１８００ｒｐｍ、荷重４０ｋｇ
の条件で３０分間試験を行い試験用鋼球の摩耗痕径の大
きさで評価した。Furthermore, the wear resistance was evaluated using a shell 4-ball friction and wear tester at a rotation speed of 1800 rpm and a load of 40 kg.
The test was conducted for 30 minutes under the following conditions and evaluated based on the size of the wear scar diameter of the test steel ball.
【００３０】結果を表１、表２および表３に示す。The results are shown in Tables 1, 2 and 3.
【００３１】[0031]
【表１】[Table 1]
【００３２】[0032]
【表２】[Table 2]
【００３３】[0033]
【表３】[Table 3]
【００３４】また、実施例１〜５の組成物の一般性状は
下記の通りであった。
密度（１５℃）ｇ／ｃｍ３ ０．８９〜０．
９１粘度 ｃＳｔ
＠ ４０℃
７５〜９０＠１００℃
１０．５〜１２．０粘度指数
１３０〜１４０流動点 ℃
−５０〜−５５The general properties of the compositions of Examples 1 to 5 were as follows. Density (15°C) g/cm3 0.89-0.
91 Viscosity cSt @ 40℃
75~90@100℃
10.5-12.0 viscosity index
130-140 pour point ℃
-50 to -55
【０
０３５】以上の実施例１〜５と比較例１〜９とから、本
発明のギヤ油組成物（実施例１〜５）は、ヒドロキシベ
ンゾエート・フェネート硫化混合物、ジアルキルカーボ
ネート、アルカリ金属ホウ酸塩水和物のすべてを含有し
ていない組成物（比較例１、２）、ヒドロキシベンゾエ
ート・フェネート硫化混合物の代わりに他の金属型清浄
剤を配合した組成物（比較例３〜５）、ジアルキルカー
ボネートの代わりにポリオキシエチレンノニルフェニル
エーテルを含有した組成物（比較例６）及び合成潤滑油
のポリα−オレフィンを用いた組成物（比較例７）、従
来のＳＰ系ギヤ油組成物（比較例８）、市販ミッション
油（比較例９）のいずれと比べても優れた熱安定性、酸
化安定性、耐摩耗性を有することがわかる。0
From the above Examples 1 to 5 and Comparative Examples 1 to 9, the gear oil compositions of the present invention (Examples 1 to 5) contain a hydroxybenzoate/phenate sulfurized mixture, a dialkyl carbonate, and an alkali metal borate hydrate. (Comparative Examples 1 and 2), compositions containing other metal-type detergents in place of the hydroxybenzoate-phenate sulfide mixture (Comparative Examples 3 to 5), and instead of dialkyl carbonate. A composition containing polyoxyethylene nonylphenyl ether (Comparative Example 6), a composition using a synthetic lubricating oil polyα-olefin (Comparative Example 7), and a conventional SP gear oil composition (Comparative Example 8) It can be seen that it has superior thermal stability, oxidation stability, and wear resistance compared to any of the commercially available transmission oils (Comparative Example 9).
【００３６】[0036]
【発明の効果】本発明の車両用ギヤ油組成物は、ヒドロ
キシベンゾエート・フェネート硫化混合物、ジアルキル
カーボネートおよびアルカリ金属ホウ酸塩水和物を各々
特定量配合させたため、高温条件下の熱安定性及び酸化
安定性、耐摩耗性が極めて良好であり、従来のギヤ油よ
りも劣化が少なく潤滑性能が高いためロングドレン化、
メンテナンスフリー化が図れるといった効果を有する。Effects of the Invention The vehicle gear oil composition of the present invention contains a hydroxybenzoate/phenate sulfide mixture, a dialkyl carbonate, and an alkali metal borate hydrate in specific amounts. It has extremely good stability and wear resistance, and has less deterioration and higher lubrication performance than conventional gear oils, so it can be used for long drains.
This has the effect of being maintenance-free.
Claims (1)
基油に、（Ａ）ヒドロキシアルキル安息香酸および／ま
たはアルキルフェノールのアルカリ土類金属塩硫化混合
物１〜１５重量％、（Ｂ）一般式 Ｒ１−Ｏ−Ｃ（＝
Ｏ）−Ｏ−Ｒ２ （ここで、Ｒ１、Ｒ２はともに炭素
数５〜２０のアルキル基である。）で表わされるジアル
キルカーボネート５〜５０重量、（Ｃ）アルカリ金属ホ
ウ酸塩水和物０．１〜１５重量％を必須成分として含有
することを特徴とする車両用ギヤ油組成物。Claim 1: A base oil having a viscosity of 2 to 50 cSt at 100°C, (A) 1 to 15% by weight of an alkaline earth metal salt sulfurized mixture of hydroxyalkylbenzoic acid and/or alkylphenol, (B) general formula R1 -O-C(=
O) -O-R2 (Here, R1 and R2 are both alkyl groups having 5 to 20 carbon atoms.) 5 to 50% by weight of dialkyl carbonate, (C) 0.1% of alkali metal borate hydrate A gear oil composition for a vehicle, characterized in that it contains ~15% by weight as an essential component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3892591A JPH04258694A (en) | 1991-02-12 | 1991-02-12 | Gear oil composition for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3892591A JPH04258694A (en) | 1991-02-12 | 1991-02-12 | Gear oil composition for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04258694A true JPH04258694A (en) | 1992-09-14 |
Family
ID=12538806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3892591A Pending JPH04258694A (en) | 1991-02-12 | 1991-02-12 | Gear oil composition for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04258694A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5562851A (en) * | 1994-12-21 | 1996-10-08 | Exxon Chemical Patents Inc. | Sulfur-containing carbonate reaction products as lubricating oil antiwear additives |
| US10074498B2 (en) | 2001-07-10 | 2018-09-11 | I/O Controls Corporation | Controllable electronic switch |
-
1991
- 1991-02-12 JP JP3892591A patent/JPH04258694A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5562851A (en) * | 1994-12-21 | 1996-10-08 | Exxon Chemical Patents Inc. | Sulfur-containing carbonate reaction products as lubricating oil antiwear additives |
| US10074498B2 (en) | 2001-07-10 | 2018-09-11 | I/O Controls Corporation | Controllable electronic switch |
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