US5047159A — Lubricant compositions having improved anti-depos…

Claim 1

Independent Claim 137 words

A lubricant composition having improved anti-deposition characteristics even at temperatures of about 343° C. comprising: (1) a basestock selected from the group consisting of (a) at least one fluid synthetic ester; (b) at least one fluid polyolefin; (c) at least one petroleum-derived lubricant fluid; and (d) mixtures thereof; and (2) a polyalkylene oxide-modified silicone oil of the general formula ##STR2## wherein EO is ethyleneoxy, PO is 1,2-propyleneoxy; Z is either hydrogen or a lower alkyl radical of up to about 5 carbons, x≧0, y≧1, and m and n are integers, the sum of m+n being at least 1, said silicone oil having a molecular weight in the range of from about 200 to about 5000 g /mole and being present in the lubricant composition in an amount effective to improve said anti-deposition characteristics of said lubricant composition.

Claim 2

Dependent Claim 137 words

A lubricant composition having improved anti-deposition characteristics even at temperatures of about 343° C. comprising: (1) a basestock selected from the group consisting of (a) at least one fluid synthetic ester; (b) at least one fluid polyolefin; (c) at least one petroleum-derived lubricant fluid; and (d) mixtures thereof; and (2) a polyalkylene oxide-modified silicone oil of the general formula ##STR2## wherein EO is ethyleneoxy, PO is 1,2-propyleneoxy; Z is either hydrogen or a lower alkyl radical of up to about 5 carbons, x≧0, y≧1, and m and n are integers, the sum of m+n being at least 1, said silicone oil having a molecular weight in the range of from about 200 to about 5000 g /mole and being present in the lubricant composition in an amount effective to improve said anti-deposition characteristics of said lubricant composition.

Claim 3

Dependent Claim 25 words

The lubricant composition of claim 1 wherein said silicone oil has a molecular weight in the range of about 400 to about 1500 g /mole.

Claim 4

Dependent Claim 21 words

The lubricant composition of claim 1 wherein said silicone oil comprises about 0.1 to about 3.0% by weight of said composition.

Claim 5

Dependent Claim 164 words

A lubricant composition for high temperature applications having improved resistance to deposition even at temperatures of about 343° C. comprising: (1) a basestock selected from the group consisting of (a) at least one synthetic ester having a 40° C. viscosity in the range of 5 to 300 cSt; (b) at least one polyolefin having a molecular weight in the range of 250 to 10,000 g/mole; and (c) a blend of said synthetic ester and said polyolefin; and (2) a polyalkylene oxide-modified silicone oil of the general formula ##STR3## wherein EO is ethyleneoxy, PO is 1,2-propyleneoxy, Z is either hydrogen or a lower alkyl radical of up to about 5 carbons, x≧0, y≧1, and m and n are integers, the sum of m+n being at least 1, said silicone oil having a molecular weight in the range of from about 200 to about 5000 g/mole and being present in the lubricant composition in an amount effective to improve said anti-deposition characteristics of said lubricant composition.

Claim 6

Dependent Claim 164 words

A lubricant composition for high temperature applications having improved resistance to deposition even at temperatures of about 343° C. comprising: (1) a basestock selected from the group consisting of (a) at least one synthetic ester having a 40° C. viscosity in the range of 5 to 300 cSt; (b) at least one polyolefin having a molecular weight in the range of 250 to 10,000 g/mole; and (c) a blend of said synthetic ester and said polyolefin; and (2) a polyalkylene oxide-modified silicone oil of the general formula ##STR3## wherein EO is ethyleneoxy, PO is 1,2-propyleneoxy, Z is either hydrogen or a lower alkyl radical of up to about 5 carbons, x≧0, y≧1, and m and n are integers, the sum of m+n being at least 1, said silicone oil having a molecular weight in the range of from about 200 to about 5000 g/mole and being present in the lubricant composition in an amount effective to improve said anti-deposition characteristics of said lubricant composition.

Claim 7

Dependent Claim 35 words

The lubricant composition of claim 4 wherein said synthetic ester is selected from the group consisting of derived from combinations of mono- and polyfunctional alcohols and fatty acids triesters, diesters, complex esters, and combinations thereof.

Claim 8

Dependent Claim 20 words

The lubricant composition of claim 4 wherein said polyolefin is selected from the group consisting of polyalphaolefins, and combinations thereof.

Claim 9

Dependent Claim 12 words

The lubricant composition cf claim 5 wherein said silicone oil has n=0.

Claim 10

Dependent Claim 25 words

The lubricant composition of claim 4 wherein said silicone oil has a molecular weight in the range of about 400 to about 1500 g /mole.

Claim 11

Dependent Claim 21 words

The lubricant composition of claim 4 wherein said silicone oil comprises about 0.1 to about 3.0% by weight of said composition.

Claim 12

Dependent Claim 12 words

The lubricant composition of claim 8 wherein said silicone oil has n=0.

Claim 13

Dependent Claim 20 words

The lubricant composition of claim 4 wherein Z is selected from the group consisting of methyl radical and butyl radical.

Claim 14

Dependent Claim 142 words

A lubricant composition for high temperature applications having improved resistance to deposition even at a temperature of about 343° C. comprising: a basestock consisting of a blend of polyol ester and polybutene, wherein said polyol ester is a reaction product of technical pentaerythritol and C 6-9 monocarboxylic acids, and said polybutene has a weight average molecular weight (M w ) in the range of 3000 to 3500 g/mole; and a polyalkylene oxide-modified silicone oil of the general formula ##STR4## wherein EO is ethyleneoxy, PO is 1,2-propyleneoxy, Z is a methyl radical, x≧0, y≧1, and m and n are integers, the sum of m+n being at least 1, said silicone oil having a molecular weight in the range of about 400 to about 1500 g/mole, said silicone oil being present in an amount effective to improve said anti-deposition characteristics of said lubricant composition.

Claim 15

Dependent Claim 142 words

A lubricant composition for high temperature applications having improved resistance to deposition even at a temperature of about 343° C. comprising: a basestock consisting of a blend of polyol ester and polybutene, wherein said polyol ester is a reaction product of technical pentaerythritol and C 6-9 monocarboxylic acids, and said polybutene has a weight average molecular weight (M w ) in the range of 3000 to 3500 g/mole; and a polyalkylene oxide-modified silicone oil of the general formula ##STR4## wherein EO is ethyleneoxy, PO is 1,2-propyleneoxy, Z is a methyl radical, x≧0, y≧1, and m and n are integers, the sum of m+n being at least 1, said silicone oil having a molecular weight in the range of about 400 to about 1500 g/mole, said silicone oil being present in an amount effective to improve said anti-deposition characteristics of said lubricant composition.

Claim 16

Dependent Claim 18 words

The composition of claim 12 wherein said silicone oil comprises about 0.1 to about 3.0% of said composition.

Claim 17

Dependent Claim 181 words

A lubricant composition having improved anti-deposition characteristics even at a temperature of about 343° C. consisting essentially of: (1) a basestock selected from the group consisting of (a) at least one fluid synthetic ester; (b) at least one fluid polyolefin; (c) at least one petroleum-derived lubricant fluid; and (d) mixtures thereof; (2) a polyalkylene oxide-modified silicone oil of the general formula ##STR5## wherein EO is ethyleneoxy, PO is 1,2-propyleneoxy, Z is either hydrogen or a lower alkyl radical of up to about 5 carbons, x≧0, y≧1, and m and n are integers, the sum of m+n being at least 1, said silicone oil having a molecular weight in the range of from about 200 to about 5000 g/mole and being present in the lubricant composition in an amount effective to improve the anti-deposition characteristics of the lubricant composition; and (3) at least one of an antioxidant, an antiwear agent, an extreme pressure agent, a rust and corrosion inhibitor, a metal deactivator, a dispersant, a detergent, an antifoamant, a demulsifier, an emulsifier, a friction modifier, a tackifier, a thickener, or a dye.

Claim 18

Dependent Claim 181 words

A lubricant composition having improved anti-deposition characteristics even at a temperature of about 343° C. consisting essentially of: (1) a basestock selected from the group consisting of (a) at least one fluid synthetic ester; (b) at least one fluid polyolefin; (c) at least one petroleum-derived lubricant fluid; and (d) mixtures thereof; (2) a polyalkylene oxide-modified silicone oil of the general formula ##STR5## wherein EO is ethyleneoxy, PO is 1,2-propyleneoxy, Z is either hydrogen or a lower alkyl radical of up to about 5 carbons, x≧0, y≧1, and m and n are integers, the sum of m+n being at least 1, said silicone oil having a molecular weight in the range of from about 200 to about 5000 g/mole and being present in the lubricant composition in an amount effective to improve the anti-deposition characteristics of the lubricant composition; and (3) at least one of an antioxidant, an antiwear agent, an extreme pressure agent, a rust and corrosion inhibitor, a metal deactivator, a dispersant, a detergent, an antifoamant, a demulsifier, an emulsifier, a friction modifier, a tackifier, a thickener, or a dye.

Claim 19

Dependent Claim 58 words

The lubricant composition of claim 14 wherein the basestock is either (a) at least one synthetic ester having a 40° C. viscosity in the range of 5 to 300 cSt; (b) at least one polyolefin having a molecular weight in the range of 250 to 10,000 g/mole; or (c) a blend of said synthetic ester and said polyolefin.

Claim 20

Dependent Claim 54 words

The lubricant composition of claim 14 wherein the basestock consists of a blend of polyol ester and polybutene, wherein said polyol ester is a reaction product of technical pentaerythritol and C 6-9 monocarboxylic acids, and said polybutene has a weight average molecular weight (M w ) in the range of 3000 to 3500 g/mole.

Claim 21

Dependent Claim 24 words

The lubricant composition of claim 14 wherein the silicone oil has a molecular weight in the range of about 400 to about 1500 g/mole.

Claim 22

Dependent Claim 21 words

The lubricant composition of claim 14 wherein the silicone oil comprises about 0.1 to about 3.0% by weight of said composition.

Claim 23

Dependent Claim 40 words

The lubricant composition of claim 15 wherein said synthetic ester is a derived from combinations of mono- and polyfunctional alcohols and fatty acids, a triester, a diester, a complex ester; or a combination of two or more of the foregoing.

Claim 24

Dependent Claim 20 words

The lubricant composition of claim 15 wherein said polyolefin is selected from the group consisting of polyalphaolefins and combinations thereof.

Claim 25

Dependent Claim 12 words

The lubricant composition of claim 15 wherein in said silicone oil n=0.

Claim 26

Independent Claim 140 words

A method of improving the anti-deposition characteristics even at a temperature of about 343° C. of a lubricant composition having a basestock selected from the group consisting of (a) at least one fluid synthetic ester; (b) at least one fluid polyolefin; (c) at least one petroleum-derived lubricant fluid; and (d) mixtures thereof; comprising adding to said basestock in an amount effective to improve said anti-deposition characteristics of said lubricant composition at least one polyalkylene oxidemodified silicone oil of the general formula ##STR6## wherein EO is ethyleneoxy, PO is 1,2-propyleneoxy, Z is either hydrogen or a lower alkyl radical of up to about 5 carbons, x≧0, y≧1, and m and n are integers, the sum of m+n being at least 1, and wherein the silicone oil has a molecular weight in the range of from about 200 to about 5000 g/mole.

Claim 27

Independent Claim 140 words

A method of improving the anti-deposition characteristics even at a temperature of about 343° C. of a lubricant composition having a basestock selected from the group consisting of (a) at least one fluid synthetic ester; (b) at least one fluid polyolefin; (c) at least one petroleum-derived lubricant fluid; and (d) mixtures thereof; comprising adding to said basestock in an amount effective to improve said anti-deposition characteristics of said lubricant composition at least one polyalkylene oxidemodified silicone oil of the general formula ##STR6## wherein EO is ethyleneoxy, PO is 1,2-propyleneoxy, Z is either hydrogen or a lower alkyl radical of up to about 5 carbons, x≧0, y≧1, and m and n are integers, the sum of m+n being at least 1, and wherein the silicone oil has a molecular weight in the range of from about 200 to about 5000 g/mole.

Claim 28

Dependent Claim 15 words

The method of claim 22 wherein said basestock is a basestock for a chain lubricant.

Claim 29

Dependent Claim 23 words

The method of claim 22 wherein said silicone oil has a molecular weight in the range of about 400 to about 1500 g/mole.

Claim 30

Dependent Claim 26 words

The method of claim 22 wherein said silicone oil is added in an amount of about 0.1 to about 3.0% by weight of the lubricant composition.

Claim 31

Dependent Claim 11 words

The method of claim 23 wherein in said silicone oil n=0.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1994-09-09	1995-03-11	1995-09-10	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1998-09-09	1999-03-11	1999-09-10	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2002-09-09	2003-03-11	2003-09-10	$7700.00	Window Closed / Lapsed

Lubricant compositions having improved anti-deposition properties comprising a polyalkylene oxide-modified silicone oil

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