Functional fluid lubricant using low Noack volatility base stock fluids
AssigneeExxonMobil Chemical Patents Inc.
InventorsDouglas E. Deckman, Mark D. Winemiller, William L. Maxwell, David J. Baillargeon, Norman Yang, Maria Caridad B. Goze
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Abstract
The present invention relates to a fully formulated lubicants comprising poly α-olefins (PAOs), prepared from a mixed α-olefin feed, which exhibit superior Noack volatility at low pour points, and methods for preparing the fully formulated lubricants. The fully formulated lubricants include PAOs that include mixtures of 1-decene and 1-dodecene. The PAOs may be prepared by polymerization/oligomerization using an alcohol promoted BF3 in conjunction with a combination of co-catalysts.
Claims52
A formulated lubricant comprising a base stock, the base stock comprising:
- (a) a 5 cSt PAO comprising from about 40 to about 80 weight percent of 1-decene and from about 60 to about 20 weight percent of 1-dodecene based on the weight of the 5 cSt PAO;
- and
- (b) a 4 cSt PAO.
A formulated lubricant comprising a base stock, the base stock comprising:
- (a) a 5 cSt PAO comprising from about 40 to about 80 weight percent of 1-decene and from about 60 to about 20 weight percent of 1-dodecene;
- and
- (b) a 4 cSt PAO,
- wherein the 4 cSt PAO is prepared by a process comprising:
- (1) oligomerizing an α-olefin feed comprising from about 40 to about 80 weight percent of 1-decene and from about 60 to 20 weight percent of 1-dodecene, in the presence of BF3 and at least two different co-catalysts, wherein the co-catalysts are selected from a group (i) alcohols and group (ii) alkyl acetates:
- provided that at least one co-catalyst is from the group (i) alcohols and at least one co-catalyst is from the group (ii) alkyl acetates;
- and
- (2) hydrogenation of at least a portion of residual unsaturation.
A formulated lubricant comprising:
- (a) a 5 cSt PAO comprising from about 40 to about 80 weight percent of 1-decene and from about 60 to about 20 weight percent of 1-dodecene;
- and
- (b) a second PAO having a viscosity lower than about 5 cSt.
A process for preparing a formulated lubricant comprising the steps of blending (a) a 5 cSt PAO comprising from about 40 to about 80 weight percent of 1-decene and about 60 to about 20 weight percent of 1-dodecene;
- and (b) a 4 cSt PAO to form a mixed PAO composition.
A formulated lubricant comprising
- (a) a base stock;
- (b) at least one 5 cSt PAO lubricant comprising a hydrogenated oligomerized α-olefin;
- and
- (c) a 4 cSt PAO;
- wherein the oligomerized α-olefin is prepared from an olefin feed comprising from about 40 to about 80 weight percent of 1-decene and from about 60 to about 20 weight percent 1-dodecene, wherein the oligomerized α-olefin has a Noack volatility of from about 4 to about 12% weight loss and a pour point of from about −40° C. to about −65° C.
A process for preparing a base stock, comprising
- (1) oligomerizing an α-olefin feed, wherein the feed consists esentially of from about 40 to about 80 weight percent of 1-decene and from about 60 to about 20 weight percent 1-dodecene, in the presence of BF3 and at least two different cocatalysts, wherein the co-catalysts are selected from group (i) alcohols and group (ii) alkyl acetates:
- provided that at least one of the co-catalysts is from the group (i) alcohols and at least one of the co-catalysts is from the group (ii) alkyl acetates;
- and
- (2) hydrogenation of at least a portion of residual unsaturation.
A base stock comprising an oligomerized α-olefin which has been subjected to hydrogenation, wherein the oligomerized α-olefin is prepared by the process of oligomerizing an olefin feed comprising about 40 to about 80 weight percent of 1-decene and from about 60 to about 20 weight percent 1-dodecene, wherein the oligomerized α-olefin has a Noack volatility of from about 4 to about 12% weight loss and a pour point of from about −40° C. to about −65° C.
A base stock composition comprising:
- (1) a conventional base stock;
- and
- (2) at least one base stock comprising an oligomerized α-olefin which has been subjected to hydrogenation, wherein the oligomerized α-olefin is prepared from an olefin feed comprising from about 40 to about 80 weight percent of 1-decene and from about 60 to about 20 weight percent of 1-dodecene, wherein the oligomerized α-olefin exhibits a Noack volatility of about 4 to about 12% weight loss and a pour point of about −40° C. to about −65° C.
Dependencies are inferred from the claim text.