[특허]Chromium HVI-PAO bi-modal lubricant compositions

Chromium HVI-PAO bi-modal lubricant compositions 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C10M-129/72 C10M-107/02
출원번호	US-0587040 (2009-10-01)
등록번호	US-8476205 (2013-07-02)
발명자 / 주소	Lee, Gordon H. Kelly, Kevin J. Rogers, Marcia G. Chinn, Kevin A.
출원인 / 주소	ExxonMobil Research and Engineering Company
대리인 / 주소	Migliorini, Robert A.
인용정보	피인용 횟수 : 2 인용 특허 : 146

초록 ▼

The invention relates to oil compositions containing chromium catalyzed high viscosity index polyalphaolefins (HVI-PAO). In one embodiment the oil formulation comprises a chromium catalyzed HVI-PAO with a viscosity greater than 125 cSt kv 100° C. and a viscosity index greater than 100, a second base stock with a viscosity of at least 2 cSt kv 100° C. and less than 60 cSt kv 100° C. wherein the second base stock is at least 120 cSt kv 100° C. less than the chromium HVI-PAO, an ester with a viscosity of at least 2 and less than 6, the ester chosen from the group consisting of monoester, di-octyl sebacate and any combination thereof comprising more than 10 weight percent and less than 30 weight percent of the oil formulation, the oil formulation having a viscosity index of greater than 180.

대표청구항 ▼

1. An oil formulation comprising: a) a chromium catalyzed HVI-PAO at from 34.9 to 43.9 wt % of the oil formulation with a viscosity of 150 cSt kv 100° C. and a viscosity index greater than 100;b) a second chromium catalyzed low viscosity PAO base stock at from 23 to 28 wt % of the oil formulation with a viscosity of 2 cSt kv 100° C.;c) di-octyl sebacate ester with a viscosity of at least 2 and less than 6 cSt kv 100° C., the di-octyl sebacate ester comprising about 20 weight percent of the oil formulation;d) the oil formulation having a viscosity index of greater than or equal to 208; andwherein the oil formulation exhibits a moisture corrosion resistance as measured by ASTM D7038/L-33-1 of at least 9.4 and a traction coefficient over a range of 0 to 30% slide-to-roll ratio of less than 0.02 (measured at a speed of 2 m/sec, a pressure of 1.00 GPa and a temperature of 80 deg. C.). 2. A method of using an oil formulation comprising: providing an oil formulation including a) a chromium catalyzed HVI-PAO at from 34.9 to 43.9 wt % of the oil formulation with a viscosity of 150 cSt kv 100° C. and a viscosity index greater than 100;b) a second chromium catalyzed low viscosity PAO base stock at from 23 to 28 wt % of the oil formulation with a viscosity of 2. cSt kv 100° C.;c) di-octyl sebacate ester with a viscosity of at least 2 and less than 6 cSt kv 100° C., the di-octyl sebacate ester comprising about 20 weight percent of the oil formulation;d) the oil formulation having a viscosity index of greater than or equal to 208; andwherein the oil formulation exhibits a moisture corrosion resistance as measured by ASTM D7038/L-33-1 of at least 9.4 and a traction coefficient over a range of 0 to 30% slide-to-roll ratio of less than 0.02 (measured at a speed of 2 m/sec, a pressure of 1.00 (Pa and a temperature of 80 deg. C.), andusing the oil formulation as an automotive gear oil. 3. The oil formulation according to claim 1, wherein the oil formulation has no olefin co-polymers (“OCP”) and no poly-iso butylene (“PIB”) viscosity modifiers. 4. The oil formulation according to claim 1, wherein the oil formulation has no viscosity modifiers. 5. The oil formulation according to claim 1, wherein said HVI-PAO is characterized by a viscosity index (VI) greater than or equal to 210, as measured by ASTM D2270, and by at least one of the following: a branch ratio of less than 0.19, a weight average molecular weight of between 300 and 45,000, a number average molecular weight of between 300 and 18,000, a molecular weight distribution of between 1 and 5, a pour point below −15° C., a bromine number of less than 3, a carbon number ranging from C30 to C1300, and a kinematic viscosity measured at 100° C. ranging from about 3 cSt to about 15,000 cSt, as measured by ASTM D445. 6. A method of improving energy efficiency and low temperature properties comprising obtaining an oil formulation comprising a chromium HVI-PAO at from 34.9 to 43.9 wt % of the oil formulation with a viscosity of 150 cSt kv 100° C. and a viscosity index greater than or equal to 208, a second chromium catalyzed low viscosity PAO base stock at from 23 to 28 wt % of the oil formulation with a viscosity of 2 cSt kv 100° C., and di-octyl sebacate ester with a viscosity of at least 2 and less than 6 cSt KV 100° C., comprising about 20 weight percent of the oil formulationand lubricating with the oil formulation,wherein the oil formulation exhibits a moisture corrosion resistance as measured by ASTM D7038/L-33-1 of at least 9.4 and a traction coefficient over a range of 0 to 30% slide-to-roll ratio of less than 0.02 (measured at a speed of 2 m/sec, a pressure of 1.00 GPa and a temperature of 80 deg. C.). 7. A method of blending an oil formulation with favorable energy efficiency and low temperature properties comprising a) obtaining a chromium HVI-PAO at from 34.9 to 43.9 wt % of the oil formulation with a viscosity of 150 cSt kv 100° C. and a viscosity index greater than or equal to 208;b) obtaining a second chromium catalyzed low viscosity PAO base stock at from 23 to 28 wt % of the oil formulation with a viscosity of 2 cSt kv 100° C.c) obtaining di-octyl sebacate ester with a viscosity of at least 2 and less than 6 cSt kv 100° C. comprising about 20 weight percent of the oil formulation;ande) blending the chromium HVI-PAO with the second chromium catalyzed low viscosity PAO base stock, and the di-octyl sebacate ester to formulate an oil formulation with favorable traction properties,wherein the oil formulation exhibits a moisture corrosion resistance as measured by ASTM D7038/L-33-1 of at least 9.4 and a traction coefficient over a range of 0 to 30% slide-to-roll ratio of less than 0.02 (measured at a speed of 2 m/sec, pressure of 1.00 GPa and a temperature of 80 deg. C.).

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