US4851144A
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US
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Lubricants for refrigeration compressors
Assignee: Dow Chemical Co
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Filing: 1989-01-10
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Granted: 1989-07-25
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Expires: 2009-01-10
Abstract
Abstract Lubricant base compositions for compression refrigeration are composed of 95 to 5% by weight of polyether polyols having a number average molecular weight from about 400 to about 5000 and 5 to 95% of esters made from polyhydric alcohols with alkanoic acids or esters made from alkanedioic acids with alkanols. A refrigeration fluid is made from the base composition with the addition of selected hydrochlorofluorocarbons and hydrofluorocarbons so that the base composition is miscible with the refrigerant in the range from -20° C. to greater than 65° C.
Inventors
- 👤 Philip W. McGraw
- 👤 Eldon L. Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:04
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K5/045; C10; C10M; C10M105/00; C10M105/08; C10M105/32; C10M105/34; C10M105/36; C10M105/38; C10M105/56; C10M105/58; C10M105/60; C10M105/62; C10M107/00; C10M107/20; C10M107/30; C10M107/32; C10M107/34; C10M111/00; C10M111/04; C10M129/00; C10M129/02; C10M129/68; C10M129/72; C10M129/74; C10M131/00; C10M131/02; C10M131/04; C10M133/00; C10M133/02; C10M133/04; C10M133/06; C10M133/08; C10M169/00; C10M169/04; C10M171/00; C10M171/008; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2207/28; C10M2207/281; C10M2207/2815; C10M2207/282; C10M2207/2825; C10M2207/283; C10M2207/2835; C10M2207/284; C10M2207/2845; C10M2207/285; C10M2207/2855; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/1033; C10M2209/104; C10M2209/1045; C10M2209/105; C10M2209/1055; C10M2209/106; C10M2209/1065; C10M2209/107; C10M2209/1075; C10M2209/108; C10M2209/1085; C10M2209/109; C10M2209/1095; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/0425; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/08; C10M2215/082; C10M2215/22; C10M2215/221; C10M2215/223; C10M2215/224; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/28; C10M2215/30; C10M2219/00; C10M2219/04; C10M2219/044; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/043; C10N; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/06
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
171 words
A lubricant composition miscible in hydrofluorocarbon and hydrochlorofluorocarbon refrigerants in the range from -20° to greater than 65° C. and having a viscosity greater than 75 centistokes at 38° C. comprising: (A) about 95 to 5% of a polyether polyol which has the formula Z-[(CH.sub.2 --CH(R.sub.1)--O--).sub.n --(CH.sub.2 --CH(CH.sub.3)--O--).sub.m --R.sub.2 ].sub.p where Z is the residue of a compound having 1-8 active hydrogens, R 1 is hydrogen, ethyl, or mixtures thereof, n is 0 or a positive number, m is a positive number, n+m is a number having a value which will give a polyether polyol with a number average molecular weight range from about 400 to about 5000, R 2 is hydrogen or an alkyl group of 1 to 6 carbon atoms, p is an integer having a value equal to the number of active hydrogens of Z, and (B) about 5 to 95% of an ester selected from the group consisting of (1) esters made from polyhydric alcohols with alkanoic acids, and (2) esters made from alkanedioic acids with alkanols.
Claim 2
Dependent Claim
171 words
A lubricant composition miscible in hydrofluorocarbon and hydrochlorofluorocarbon refrigerants in the range from -20° to greater than 65° C. and having a viscosity greater than 75 centistokes at 38° C. comprising: (A) about 95 to 5% of a polyether polyol which has the formula Z-[(CH.sub.2 --CH(R.sub.1)--O--).sub.n --(CH.sub.2 --CH(CH.sub.3)--O--).sub.m --R.sub.2 ].sub.p where Z is the residue of a compound having 1-8 active hydrogens, R 1 is hydrogen, ethyl, or mixtures thereof, n is 0 or a positive number, m is a positive number, n+m is a number having a value which will give a polyether polyol with a number average molecular weight range from about 400 to about 5000, R 2 is hydrogen or an alkyl group of 1 to 6 carbon atoms, p is an integer having a value equal to the number of active hydrogens of Z, and (B) about 5 to 95% of an ester selected from the group consisting of (1) esters made from polyhydric alcohols with alkanoic acids, and (2) esters made from alkanedioic acids with alkanols.
Claim 3
Dependent Claim
148 words
A lubricant composition miscible in hydrofluorocarbon and hydrochlorofluorocarbon refrigerants in the range from -20° to greater than 65° C. and having a viscosity greater than 75 centistokes at 38° C. comprising: (A) about 95 to 5% of a polyether polyol which has the formula Z--[(--CH.sub.2 --CH(CH.sub.3)--O--).sub.n --R].sub.p where Z is the residue of a compound having 1-8 active hydrogens, n is a number having an average value which will give a polyether polyol with a number average molecular weight range from about 400 to about 5000, R is hydrogen or an alkyl group of 1 to 6 carbon atoms, p is an integer having a value equal to the number of active hydrogens of Z, and (B) about 5 to 95% of an ester selected from the group consisting of (1) esters made from polyhydric alcohols with alkanoic acids, and (2) esters made from alkanedioic acids with alkanols.
Claim 4
Dependent Claim
148 words
A lubricant composition miscible in hydrofluorocarbon and hydrochlorofluorocarbon refrigerants in the range from -20° to greater than 65° C. and having a viscosity greater than 75 centistokes at 38° C. comprising: (A) about 95 to 5% of a polyether polyol which has the formula Z--[(--CH.sub.2 --CH(CH.sub.3)--O--).sub.n --R].sub.p where Z is the residue of a compound having 1-8 active hydrogens, n is a number having an average value which will give a polyether polyol with a number average molecular weight range from about 400 to about 5000, R is hydrogen or an alkyl group of 1 to 6 carbon atoms, p is an integer having a value equal to the number of active hydrogens of Z, and (B) about 5 to 95% of an ester selected from the group consisting of (1) esters made from polyhydric alcohols with alkanoic acids, and (2) esters made from alkanedioic acids with alkanols.
Claim 5
Dependent Claim
44 words
A lubricant composition as set forth in claim 2 wherein the polyether polyol is based on a residue selected from the group consisting of glycerine and ethylene diamine and the ester is a pentaerythritol tetraester of a mixture of alkanoic acids having 7-9 carbons.
Claim 6
Dependent Claim
168 words
A fluid composition for use in compression refrigeration comprising (A) a refrigerant selected from the group consisting of hydrochlorofluorocarbons and hydrofluorocarbons, and (B) a lubricant composition which comprises (1) about 95 to 5% of a polyether polyol which has the formula Z--[(CH.sub.2 --CH(R.sub.1)--O--).sub.n --(CH.sub.2 --CH(CH.sub.3)--O--).sub.m --R.sub.2 ].sub.p where Z is the residue of a compound having 1-8 active hydrogens, R 1 is hydrogen, ethyl, or mixtures thereof. n is 0 or a positive number, m is a positive number, n+m is a number having a value which will give a polyether polyol with a number average molecular weight range from about 400 to about 5000, R 2 is hydrogen or an alkyl group of 1 to 6 carbon atoms, p is an integer having a value equal to the number of active hydrogens of Z, and (2) about 5 to 95% of an ester selected from the group consisting of (a) esters made from polyhydric alcohols with alkanoic acids, and (b) esters made from alkanedioic acids with alkanols.
Claim 7
Dependent Claim
168 words
A fluid composition for use in compression refrigeration comprising (A) a refrigerant selected from the group consisting of hydrochlorofluorocarbons and hydrofluorocarbons, and (B) a lubricant composition which comprises (1) about 95 to 5% of a polyether polyol which has the formula Z--[(CH.sub.2 --CH(R.sub.1)--O--).sub.n --(CH.sub.2 --CH(CH.sub.3)--O--).sub.m --R.sub.2 ].sub.p where Z is the residue of a compound having 1-8 active hydrogens, R 1 is hydrogen, ethyl, or mixtures thereof. n is 0 or a positive number, m is a positive number, n+m is a number having a value which will give a polyether polyol with a number average molecular weight range from about 400 to about 5000, R 2 is hydrogen or an alkyl group of 1 to 6 carbon atoms, p is an integer having a value equal to the number of active hydrogens of Z, and (2) about 5 to 95% of an ester selected from the group consisting of (a) esters made from polyhydric alcohols with alkanoic acids, and (b) esters made from alkanedioic acids with alkanols.
Claim 8
Dependent Claim
23 words
The composition of claim 4 wherein said fluid composition contains a concentration of about 1 to about 30% by weight of lubricant composition.
Claim 9
Dependent Claim
24 words
The composition of claim 4 wherein said hydrochlorofluorocarbons are selected from the group consisting of chlorodifluoromethane, chlorofluoromethane, 2,2-dichloro-1,1,1-trifluoroethane, 1-chloro-1,2,2,2-tetrafluoroethane, 2-chloro-1,1,2,2-tetrafluoroethane, 1-chloro-2,2,2-trifluoroethane, 1,1-dichloro-1-fluoroethane and 2-chloro-2,2-difluoroethane.
Claim 10
Dependent Claim
27 words
The composition of claim 4 wherein said hydrofluorocarbons are selected from the group consisting of 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, 1,1,1-trifluoroethane, 2,2-difluoroethane, trifluoromethane, methylene fluoride, methyl fluoride, difluoroethylene and pentafluoroethane.
Claim 11
Dependent Claim
10 words
The composition of claim 4 wherein said hydrofluorocarbon is 1,1,1,2-tetrafluoroethane.
Claim 12
Dependent Claim
145 words
A fluid composition for use in compression refrigeration comprising (A) a refrigerant selected from the group consisting of hydrochlorofluorocarbons and hydrofluorocarbons, and (B) a lubricant composition which comprises (1) about 95 to 5% of a polyether polyol which has the formula Z--[(--CH.sub.2 --CH(CH.sub.3)--O--).sub.n --R].sub.p where Z is the residue of a compound having 1-8 active hydrogens, n is a number having an average value which will give a polyether polyol with a number average molecular weight range from about 400 to about 5000, R is hydrogen or an alkyl group of 1 to 6 carbon atoms, p is an integer having a value equal to the number of active hydrogens of Z, and (2) about 5 to 95% of an ester selected from the group consisting of (a) esters made from polyhydric alcohols with alkanoic acids, and (b) esters made from alkanedioic acids with alkanols.
Claim 13
Dependent Claim
145 words
A fluid composition for use in compression refrigeration comprising (A) a refrigerant selected from the group consisting of hydrochlorofluorocarbons and hydrofluorocarbons, and (B) a lubricant composition which comprises (1) about 95 to 5% of a polyether polyol which has the formula Z--[(--CH.sub.2 --CH(CH.sub.3)--O--).sub.n --R].sub.p where Z is the residue of a compound having 1-8 active hydrogens, n is a number having an average value which will give a polyether polyol with a number average molecular weight range from about 400 to about 5000, R is hydrogen or an alkyl group of 1 to 6 carbon atoms, p is an integer having a value equal to the number of active hydrogens of Z, and (2) about 5 to 95% of an ester selected from the group consisting of (a) esters made from polyhydric alcohols with alkanoic acids, and (b) esters made from alkanedioic acids with alkanols.
Claim 14
Dependent Claim
44 words
A lubricant composition as set forth in claim 9 wherein the polyether polyol is based on a residue selected from the group consisting of glycerine and ethylene diamine and the ester is a pentaerythritol tetraester of a mixture of alkanoic acids having 7-9 carbons.
Claim 15
Dependent Claim
23 words
The composition of claim 9 wherein said fluid composition contains a concentration of about 1 to about 25% by weight of lubricant composition.
Claim 16
Dependent Claim
24 words
The composition of claim 9 wherein said hydrochlorofluorocarbons are selected from the group consisting of chlorodifluoromethane, chlorofluoromethane, 2,2-dichloro-1,1,1-trifluoroethane, 1-chloro-1,2,2,2-tetrafluoroethane, 2-chloro-1,1,2,2-tetrafluoroethane, 1-chloro-2,2,2-trifluoroethane, 1,1-dichloro-1-fluoroethane and 2-chloro-2,2-difluoroethane.
Claim 17
Dependent Claim
27 words
The composition of claim 9 wherein said hydrofluorocarbons are selected from the group consisting of 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, 1,1,1-trifluoroethane, 2,2-difluoroethane, trifluoromethane, methylene fluoride, methyl fluoride, difluoroethylene and pentafluoroethane.
Claim 18
Dependent Claim
10 words
The composition of claim 9 wherein said hydrofluorocarbon is 1,1,1,2-tetrafluoroethane.
Claim 19
Independent Claim
32 words
A method of lubricating and/or operating compression refrigeration equipment which comprises using as the lubricant the composition of claims 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-07-24 | 1993-01-23 | 1993-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-24 | 1997-01-23 | 1997-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-24 | 2001-01-23 | 2001-07-25 | $7700.00 | Window Closed / Lapsed |