Patent US3639094A successfully refreshed from Google Patents.
US4059534A
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Hydrocarbon/silicon oil lubricating compositions for low temperature use
Assignee: Union Carbide Canada Ltd
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Filing: 1976-04-07
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Granted: 1977-11-22
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Expires: 1996-04-07
Abstract
Abstract A low temperature lubricant oil composition having improved viscosity-temperature properties, lubricating properties and pour point is described. The composition comprises a homogeneous mixture of from 1% to 50% by weight of poly(dimethylsiloxane) having an average viscosity at 100° F between 100,000 cs and 1,000,000 cs, the remainder of the mixture being a hydrocarbon oil selected from certain alkenes, isoparaffins and naphthenics. The composition can also contain a foam inhibitor such as a perfluoroalkylpolyether.
Inventors
- 👤 William Charles Morro
- 👤 Leo Ernest Hakka
- 👤 James Mackay Brophy
- 👤 Michel Jacques Roger Hebrard
- 👤 Jean Claude Courtes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:07
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/10; C10M2203/102; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/024; C10M2205/026; C10M2205/14; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/284; C10M2207/285; C10M2213/00; C10M2213/04; C10M2213/06; C10M2219/00; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/045; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/04; C10N2010/08; C10N2010/10; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
23 words
A lubricating oil composition comprising a homogeneous mixture of from 1% to 50% by weight of (A) poly(dimethylsiloxane) having the general formula: ##STR7##
Claim 2
Dependent Claim
23 words
A lubricating oil composition comprising a homogeneous mixture of from 1% to 50% by weight of (A) poly(dimethylsiloxane) having the general formula: ##STR7##
Claim 3
Dependent Claim
184 words
when R is a methyl group in essentially all cases and n has a value such that the average viscosity of the poly(dimethylsiloxane) at 100° F is between 10,000 cs and 1,000,000 cs, and the remainder of said mixture consisting of (B) hydrocarbon oil having a viscosity of less than 40,000 cs at -65° F, and a flashpoint higher than 175° F, and said hydrocarbon oil being at least one selected from the group consisting of (a) alkenes, (b) isoparaffins, and (c) naphthenics having a single ring which has multiple alkyl substituents; in the case of (a) and (b), the longest carbon chain, and in the case of (c) any alkyl substituent in which the longest carbon chain exceeds five carbon atoms, has multiple substituent alkyl branches, and its methyl branched homolog has a solubility parameter of less than 7.84 and said substituent alkyl branches of four or more carbon atoms are themselves branched, and where at least 50% of said substituent alkyl branches are bonded to carbons of the longest carbon chain which are immediately adjacent, or separated by only one carbon atom.
Claim 4
Dependent Claim
184 words
when R is a methyl group in essentially all cases and n has a value such that the average viscosity of the poly(dimethylsiloxane) at 100° F is between 10,000 cs and 1,000,000 cs, and the remainder of said mixture consisting of (B) hydrocarbon oil having a viscosity of less than 40,000 cs at -65° F, and a flashpoint higher than 175° F, and said hydrocarbon oil being at least one selected from the group consisting of (a) alkenes, (b) isoparaffins, and (c) naphthenics having a single ring which has multiple alkyl substituents; in the case of (a) and (b), the longest carbon chain, and in the case of (c) any alkyl substituent in which the longest carbon chain exceeds five carbon atoms, has multiple substituent alkyl branches, and its methyl branched homolog has a solubility parameter of less than 7.84 and said substituent alkyl branches of four or more carbon atoms are themselves branched, and where at least 50% of said substituent alkyl branches are bonded to carbons of the longest carbon chain which are immediately adjacent, or separated by only one carbon atom.
Claim 5
Dependent Claim
155 words
A composition as claimed in claim 1 comprising a minor amount of an antiwear additive (C) selected from the group consisting of (1) metal salts of thiophosphates corresponding to the formula: ##STR8## in which each of R', R", R'" and R"" is one selected from the group consisting of an alkyl group and an aryl group and M is one selected from the group consisting of cadmium, lead, and zinc; (2) metal salts of thiocarbamates corresponding to the formula: ##STR9## in which each of R', R", R'" and R"" is one selected from the group consisting of an alkyl group and an aryl group and M is one selected from the group consisting of antimony and cadmium; and (3) esters of 4-isopropyl benzoic acid, commonly known as cumic acid, corresponding to the formula: ##STR10## where R""' is an alkyl group; wherein the proportion of component (C), is sufficient to give antiwear properties to the composition.
Claim 6
Dependent Claim
22 words
A composition as claimed in claim 1 containing a minor amount of (D) perfluoroalkylpolyether corresponding to the formula: F--[CF(CF.sub.3)CF.sub.2 O].sub.x C.sub.2 F.sub.5
Claim 7
Dependent Claim
41 words
in which x has a value providing an average molecular weight for the perfluoroalkylpolyether ranging from about 2,000 to 7,000, wherein the amount of (D) in said composition is from 1 to about 500 ppm, by weight of the total composition.
Claim 8
Dependent Claim
41 words
in which x has a value providing an average molecular weight for the perfluoroalkylpolyether ranging from about 2,000 to 7,000, wherein the amount of (D) in said composition is from 1 to about 500 ppm, by weight of the total composition.
Claim 9
Dependent Claim
49 words
A composition as claimed in claim 1 where the longest linear segments of the hydrocarbon oil have no substituent alkyl branches which exceed two carbons in length, and where n has values such that the viscosity of the poly(dimethylsiloxone) at 100° F is between 10,000 cs and 50,000 cs.
Claim 10
Dependent Claim
49 words
A composition as claimed in claim 2 where the longest linear segments of the hydrocarbon oil have no substituent alkyl branches which exceed two carbons in length, and where n has values such that the viscosity of the poly(dimethylsiloxone) at 100° F is between 10,000 cs and 50,000 cs.
Claim 11
Dependent Claim
49 words
A composition as claimed in claim 3 where the longest linear segments of the hydrocarbon oil have no substituent alkyl branches which exceed two carbons in length, and where n has values such that the viscosity of the poly(dimethylsiloxone) at 100° F is between 10,000 cs and 50,000 cs.
Claim 12
Dependent Claim
39 words
A composition as claimed in claim 1 wherein said hydrocarbon oil is one selected from the group consisting of iso-paraffin and alkene, and wherein the amount of component (a) in said mixture is from 5% to 30% by weight.
Claim 13
Dependent Claim
13 words
A composition as claimed in claim 7 wherein said hydrocarbon oil is nephthenic.
Claim 14
Dependent Claim
39 words
A composition as claimed in claim 2 wherein said hydrocarbon oil is one selected from the group consisting of iso-paraffin and alkene, and wherein the amount of component (A) in said mixture is from 5% to 30% by weight.
Claim 15
Dependent Claim
13 words
A composition as claimed in claim 9 wherein said hydrocarbon oil is nephthenic.
Claim 16
Dependent Claim
39 words
A composition as claimed in claim 3 wherein said hydrocarbon oil is one selected from the group consisting of iso-paraffin and alkene, and wherein the amount of component (A) in said mixture is from 5% to 30% by weight.
Claim 17
Dependent Claim
13 words
A composition as claimed in claim 11 wherein said hydrocarbon oil is nephthenic.
Claim 18
Dependent Claim
31 words
A composition as claimed in claim 1 wherein the hydrocarbon oils (B) are saturated or unsaturated copolymers of hydrocarbons selected from the group consisting of 2, 3 and 4 carbon atoms.
Claim 19
Dependent Claim
31 words
A composition as claimed in claim 2 wherein the hydrocarbon oils (B) are saturated or unsaturated copolymers of hydrocarbons selected from the group consisting of 2, 3 and 4 carbon atoms.
Claim 20
Dependent Claim
31 words
A composition as claimed in claim 3 wherein the hydrocarbon oils (B) are saturated or unsaturated copolymers of hydrocarbons selected from the group consisting of 2, 3, and 4 carbon atoms.
Claim 21
Dependent Claim
21 words
A composition as claimed in claim 1 wherein the hydrocarbon oils (B) are saturated and unsaturated copolymers of propylene and iso-butylene.
Claim 22
Dependent Claim
21 words
A composition as claimed in claim 2 wherein the hydrocarbon oils (B) are saturated and unsaturated copolymers of propylene and iso-butylene.
Claim 23
Dependent Claim
21 words
A composition as claimed in claim 3 wherein the hydrocarbon oils (B) are saturated and unsaturated copolymers of propylene and iso-butylene.
Claim 24
Dependent Claim
19 words
A composition as claimed in claim 1 wherein the hydrocarbon oils (B) are saturated or unsaturated polymers of propylene.
Claim 25
Dependent Claim
19 words
A composition as claimed in claim 2 wherein the hydrocarbon oils (B) are saturated or unsaturated polymers of propylene.
Claim 26
Dependent Claim
19 words
A composition as claimed in claim 3 wherein the hydrocarbon oils (B) are saturated and unsaturated polymers of propylene.
Claim 27
Dependent Claim
79 words
A composition as claimed in claim 2 where (C) is (1), a metal salt of thiophosphate wherein M is zinc and wherein R', R", R'", R"" are alkyl groups of no more than 18 carbons, and wherein the proportion of component (C) ranges from a concentration such that the weight percent of zinc is about 0.02% of the total composition to a concentration of (C) such that the weight percent of zinc is about 0.5% of the total composition.
Claim 28
Dependent Claim
75 words
A composition as defined in claim 2 where (C) is (2), a metal salt of thiocarbamate wherein R', R", R'", R"" are alkyl groups of no more than 18 carbons each, and wherein the proportion of component (C) ranges from a concentration such that the weight percent of M is about 0.02% of the total composition to a concentration of (C) such that the weight percent of M is about 0.5% of the total composition.
Claim 29
Dependent Claim
49 words
A composition as defined in claim 2 where (C) is (3), an ester of cumic acid, wherein R'"" is an alkyl group of no more than 10 carbons, and wherein the proportion of (C) ranges from about 0.1 weight percent to about 2 weight percent of the total composition.
Claim 30
Dependent Claim
13 words
A composition as defined in claim 24 wherein R'"" is an isobutyl group.
Claim 31
Dependent Claim
49 words
A composition as defined in claim 3 wherein x has a value which provides an average molecular weight for the perfluoroalkylpolyether ranging from about 2,000 to 5,500 and wherein the proportion of (D) ranges from about 5 to about 10 parts per million by weight of the total composition.
Claim 32
Dependent Claim
64 words
A composition as claimed in claim 2 containing a minor amount of (D) perfluoroalkyl-polyether corresponding to the formula: F--[CF(CF.sub.3)CF.sub.2 O].sub.x C.sub.2 F.sub.5 in which x has a value providing an average molecular weight for the perfluoroalkylpolyether ranging from about 2,000 to 7,000 and wherein the amount of (D) in said composition is from 1 to about 500 ppm by weight of the total composition.
Claim 33
Dependent Claim
52 words
A composition as claimed in claim 27 wherein x has a value providing an average molecular weight for the perfluoroalkylpolyether ranging from about 2,000 to 5,500 and wherein the proportion amount of (D) in said composition is from about 5 to about 100 parts per million by weight of the total composition.
Claim 34
Dependent Claim
63 words
A lubricating oil composition comprising a hydrocarbon oil, from 1% to 50% by weight of the total composition of poly(organosiloxane) and from 1 to 500 parts per million of the total composition of perfluoroalkylpolyether corresponding to the formula: F--[CF(CF.sub.3)CF.sub.2 O].sub.x C.sub.2 F.sub.5 in which x has a value which provides an average molecular weight for the perfluoroalkylpolyether ranging from about 2,000 to 7,000.
Claim 35
Dependent Claim
63 words
A lubricating oil composition comprising a hydrocarbon oil, from 1% to 50% by weight of the total composition of poly(organosiloxane) and from 1 to 500 parts per million of the total composition of perfluoroalkylpolyether corresponding to the formula: F--[CF(CF.sub.3)CF.sub.2 O].sub.x C.sub.2 F.sub.5 in which x has a value which provides an average molecular weight for the perfluoroalkylpolyether ranging from about 2,000 to 7,000.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |