润滑科技信息平台

专利摘要

本发明要解决的问题是提供一种燃气发动机用润滑油组合物,其能够在降低硫酸灰分含量的同时抑制粘度增加,并且高温清净性和碱值保持性优异。该润滑油组合物用于燃气发动机并含有基础油(A)、至少一种选自无灰硫基抗氧化剂(B1)和受阻胺化合物(B2)的无灰添加剂(B), 含有硼酰亚胺系分散剂(C),且满足下述要件(X1)~(X3)。要件(X1):硫酸灰分含量为0.2质量%以下。要求(X2):基于润滑油组合物的总量,无灰添加剂(B)的含量为1.2质量%以下,条件是在无灰添加剂(B)含有以下物质的情况下: 受阻胺化合物(B2),受阻胺化合物(B2)的含量相对于润滑油组合物总量小于1.0质量%。条件(X3):来自硼化酰亚胺系分散剂(C)的硼原子的含量相对于润滑油组合物总量为200质量ppm以上。 ......

基本信息

专利类型:
发明专利
申请/专利号:
US17/442722
申请日期:
2020-03-27
专利申请人:
出光兴产株式会社
分类号:
["C10M135/18","C10M125/22","C10M129/54","C10M133/42","C10M133/56","C10M137/10","C10M169/04","C10N10/04","C10N10/06","C10N30/00","C10N30/04","C10N30/10","C10N40/25"]
发明/设计人:
UTAKA, TOSHIMASA
权利要求: 1. A lubricating oil composition, comprising:a base oil (A);at least one ash-free additive (B) selected from the group consisting of an ash-free sulfur-based antioxidant (B1) and a hindered amine compound (B2), wherein the ash-free sulfur-based antioxidant (B1) is at least one selected from the group consisting of a thiocarbamate compound, a sulfur-containing triazine compound and sulfurized oils and fats, and the hindered amine compound (B2) has one or two piperidine-derived skeletons;a boronated imide-type dispersant (C), wherein a sulfated ash content is 0.2% by mass or less; anda non-boronated imide-type dispersant (D), whereinthe content of the ash-free additive (B) is 1.2% by mass or less based on the total amount of the lubricating oil composition, provided that in the case where the ash-free additive (B) contains the hindered amine compound (B2), the content of the hindered amine compound (B2) is less than 1.0% by mass based on the total amount of the lubricating oil composition, andthe content of the boron atom derived from the boronated imide-type dispersant (C) is 200 ppm by mass or more based on the total amount of the lubricating oil composition.2. The lubricating oil composition according to claim 1, wherein the sulfated ash content is 0.01% by mass or more and 0.2% by mass or less.3. The lubricating oil composition according to claim 1, wherein:the content of the boron atom derived from the boronated imide-type dispersant (C) relative to the total content of the nitrogen atom derived from the boronated imide-type dispersant (C) and the nitrogen atom derived from the non-boronated imide-type dispersant (D) is 0.10 to 1.0 as a ratio by mass.4. The lubricating oil composition according to claim 1, further comprising at least one metal-based detergent (E) selected from the group consisting of a calcium-based detergent (E1) and a magnesium-based detergent (E2), wherein:the content of the metal atom derived from the metal-based detergent (E) is 50 to 200 ppm by mass based on the total amount of the lubricating oil composition.5. The lubricating oil composition according to claim 1, further comprising a zinc dithiophosphate (F), wherein:the content of the phosphorus atom derived from the zinc dithiophosphate (F) is 50 to 300 ppm by mass based on the total amount of the lubricating oil composition.6. A method of lubrication, the method comprising:applying the lubricating oil composition according to claim 1 to a gas engine equipped in a gas cogeneration system or equipped in a gas heat pump.7. The lubricating oil composition according to claim 1, wherein the thiocarbamate compound is represented by at least one formula selected from the group consisting of (b1-1a) and (b1-1b),where R11B, R12B, R13B and R14B each represent an alkyl group having 1 to 30 carbon atoms, or a phenyl group,R11B, R12B, R13B and R14B may be the same or different,R15B represents an alkylene group having 1 to 10 carbon atoms,R16B and R17B each represent an alkyl group having 1 to 30 carbon atoms, or a phenyl group,R16B and R17B may be the same or different, andR18B represents a hydrogen atom or an alkylene group having 1 to 10 carbon atoms.8. The lubricating oil composition according to claim 7, wherein the polysulfide compound includes at least one dihydrocarbyl polysulfide compound represented by a formula (b1-3),R21—Sx—R22 (b1-3),where R21 and R22 each independently represent a hydrocarbon group selected from an alkyl group, linear or branched, having 3 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an alkylaryl group having 7 to 20 carbon atoms, an arylalkyl group having 7 to 20 carbon atoms, and an alkenyl group, linear or branched, having 3 to 20 carbon atoms,R21 and R22 may be the same or different, andx represents an integer of 2 to 10.