US4959169A
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US
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Esterified polyglycol lubricants for refrigeration compressors
Assignee: Dow Chemical Co
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Filing: 1989-10-20
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Granted: 1990-09-25
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Expires: 2009-10-20
Abstract
Abstract Refrigeration fluid compositions for compression refrigeration which have an upper solution critical temperature equal to or greater than about 35° C. are composed of selected hydrochlorofluorocarbons and hydrofluorocarbons with esterified polyether polyols in which at least 30% of the hydroxyls are esterified. The esterified polyether polyols have a viscosity between 25 and 150 centistokes at 38° C.
Inventors
- 👤 Philip W. McGraw
- 👤 Eldon L. Ward
- 👤 Michael W. Edens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:28
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C10; C10M; C10M171/00; C10M171/008; C10M107/00; C10M107/20; C10M107/30; C10M107/32; C10M107/34; C10M145/00; C10M145/18; C10M145/24; C10M145/26; C10M145/38; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/107; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10N; C10N2020/00; C10N2020/01
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
185 words
Fluid compositions for use in compression refrigeration which have an upper solution critical temperature equal to or greater than about 35° C. comprising (A) a refrigerant selected from the group consisting of hydrofluorocarbons and hydrochlorofluorocarbons and (B) a lubricant composition which comprises polyether polyols or polyether alcohols which have a viscosity between 25 and 150 centistokes at 38° C. and where greater than about 30% of the hydroxyl groups of said polyols or alcohols are esterified wherein said esterified polyether polyols or polyether alcohols have the formula Z--[(CH.sub.2 --CH(R.sub.1)--O--).sub.n --(CH.sub.2 --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 hydroqen, ethyl, or mixtures thereof, R 2 is an alkanoyl group of 2 to 6 carbon atoms or hydrogen, n is 0 or a positive number, m is a positive number, n+m is a number having a value which will give an esterified polyether polyol or polyether alcohol with a number average molecular weight range from about 400 to about 2500, p is an integer having a value equal to the number of active hydrogens of Z.
Claim 2
Dependent Claim
185 words
Fluid compositions for use in compression refrigeration which have an upper solution critical temperature equal to or greater than about 35° C. comprising (A) a refrigerant selected from the group consisting of hydrofluorocarbons and hydrochlorofluorocarbons and (B) a lubricant composition which comprises polyether polyols or polyether alcohols which have a viscosity between 25 and 150 centistokes at 38° C. and where greater than about 30% of the hydroxyl groups of said polyols or alcohols are esterified wherein said esterified polyether polyols or polyether alcohols have the formula Z--[(CH.sub.2 --CH(R.sub.1)--O--).sub.n --(CH.sub.2 --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 hydroqen, ethyl, or mixtures thereof, R 2 is an alkanoyl group of 2 to 6 carbon atoms or hydrogen, n is 0 or a positive number, m is a positive number, n+m is a number having a value which will give an esterified polyether polyol or polyether alcohol with a number average molecular weight range from about 400 to about 2500, p is an integer having a value equal to the number of active hydrogens of Z.
Claim 3
Dependent Claim
16 words
The composition of claim 1 where greater than about 60% of the hydroxyl groups are esterified.
Claim 4
Dependent Claim
17 words
The composition of claim 1 where about 95 to about 100% of the hydroxyl groups are esterified.
Claim 5
Dependent Claim
23 words
The composition of claim 1 wherein said fluid composition contains a concentration of about 1 to about 75% by weight of lubricant composition.
Claim 6
Dependent Claim
24 words
The composition of claim 1 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 1-chloro-1,1-difluoroethane.
Claim 7
Dependent Claim
27 words
The composition of claim 1 wherein said hydrofluorocarbons are selected from the group consisting of 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, 1,1,1-trifluoroethane, 1,1-difluoroethane, trifluoromethane, methylene fluoride, methyl fluoride, difluorethylene and pentafluoroethane.
Claim 8
Dependent Claim
17 words
The composition of claim 1 where Z is the residue of a compound having 1-4 active hydrogens.
Claim 9
Dependent Claim
164 words
Fluid compositions for use in compression refrigeration which have an upper solution critical temperature equal to or greater than about 35° C. comprising (A) a refrigerant selected from the group consisting of hydrofluorocarbons and hydrochlorofluorocarbons and (B) a lubricant composition which comprises polyether polyols or polyether alcohols which have a viscosity between 25 and 150 centistokes at 38° C. and where greater than about 30% of the hydroxyl groups of said polyols or alcohols are esterified wherein said esterified polyether polyols or polyether alcohols have the formula Z--[(CH.sub.2 --CH(CH.sub.3)--O--).sub.n --R.sub.1 ].sub.p where Z is the residue of a compound having 1-8 active hydrogens, R 1 is an alkanoyl group of 2 to 6 carbon atoms or hydrogen, n is a number having a value which will give an esterified polyether polyol or polyether alcohols with a number average molecular weight range from about 400 to about 2500, p is an integer having a value equal to the the number of active hydrogens of Z.
Claim 10
Dependent Claim
164 words
Fluid compositions for use in compression refrigeration which have an upper solution critical temperature equal to or greater than about 35° C. comprising (A) a refrigerant selected from the group consisting of hydrofluorocarbons and hydrochlorofluorocarbons and (B) a lubricant composition which comprises polyether polyols or polyether alcohols which have a viscosity between 25 and 150 centistokes at 38° C. and where greater than about 30% of the hydroxyl groups of said polyols or alcohols are esterified wherein said esterified polyether polyols or polyether alcohols have the formula Z--[(CH.sub.2 --CH(CH.sub.3)--O--).sub.n --R.sub.1 ].sub.p where Z is the residue of a compound having 1-8 active hydrogens, R 1 is an alkanoyl group of 2 to 6 carbon atoms or hydrogen, n is a number having a value which will give an esterified polyether polyol or polyether alcohols with a number average molecular weight range from about 400 to about 2500, p is an integer having a value equal to the the number of active hydrogens of Z.
Claim 11
Dependent Claim
16 words
The composition of claim 8 where greater than about 60% of the hydroxyl groups are esterified.
Claim 12
Dependent Claim
17 words
The composition of claim 8 where about 95 to about 100% of the hydroxyl groups are esterified.
Claim 13
Dependent Claim
23 words
The composition of claim 8 wherein said fluid composition contains a concentration of about 1 to about 75% by weight of lubricant composition.
Claim 14
Dependent Claim
24 words
The composition of claim 8 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 1-chloro-1,1-difluoroethane.
Claim 15
Dependent Claim
27 words
The composition of claim 8 wherein said hydrofluorocarbons are selected from the group consisting of 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, 1,1,1-trifluoroethane, 1,1-difluoroethane, trifluoromethane, methylene fluoride, methyl fluoride, difluoroethylene and pentafluoroethane.
Claim 16
Dependent Claim
17 words
The composition of claim 8 where Z is the residue of a compound having 1-4 active hydrogens.
Claim 17
Dependent Claim
153 words
Fluid compositions for use in compression refrigeration which have an upper solution critical temperature equal to or greater than about 35° C. comprising (A) 1,1,1,2-tetrafluoroethane and (B) a lubricant composition which comprises polyether polyols or polyether alcohols which have a viscosity between 25 and 150 centistokes at 38° C. and where greater than about 30% of the hydroxyl groups of said polyols or alcohols are esterified wherein said esterified polyether polyols or polyether alcohols have the formula Z--[(CH.sub.2 --CH(CH.sub.3)--O--).sub.n --R.sub.1 ].sub.p where Z is the residue of a compound having 1-8 active hydrogens, R 1 is an alkanoyl group of 2 to 6 carbon atoms or hydrogen, n is a number having a value which will give an esterified polyether polyol or polyether alcohols with a number average molecular weight range from about 400 to about 2500, p is an integer having a value equal to the number of active hydrogens of Z.
Claim 18
Dependent Claim
153 words
Fluid compositions for use in compression refrigeration which have an upper solution critical temperature equal to or greater than about 35° C. comprising (A) 1,1,1,2-tetrafluoroethane and (B) a lubricant composition which comprises polyether polyols or polyether alcohols which have a viscosity between 25 and 150 centistokes at 38° C. and where greater than about 30% of the hydroxyl groups of said polyols or alcohols are esterified wherein said esterified polyether polyols or polyether alcohols have the formula Z--[(CH.sub.2 --CH(CH.sub.3)--O--).sub.n --R.sub.1 ].sub.p where Z is the residue of a compound having 1-8 active hydrogens, R 1 is an alkanoyl group of 2 to 6 carbon atoms or hydrogen, n is a number having a value which will give an esterified polyether polyol or polyether alcohols with a number average molecular weight range from about 400 to about 2500, p is an integer having a value equal to the number of active hydrogens of Z.
Claim 19
Dependent Claim
16 words
The composition of claim 15 where greater than about 60% of the hydroxyl groups are esterified.
Claim 20
Dependent Claim
17 words
The composition of claim 15 where about 95 to about 100% of the hydroxyl groups are esterified.
Claim 21
Dependent Claim
23 words
The composition of claim 15 wherein said fluid composition contains a concentration of about 1 to about 75% by weight of lubricant composition.
Claim 22
Dependent Claim
24 words
The composition of claim 15 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 1-chloro-1,1-difluoroethane.
Claim 23
Dependent Claim
27 words
The composition of claim 15 wherein said hydrofluorocarbons are selected from the group consisting of 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, 1,1,1-trifluoroethane, 1,1-difluoroethane, trifluoromethane, methylene fluoride, methyl fluoride, difluorethylene and pentafluoroethane.
Claim 24
Dependent Claim
17 words
The composition of claim 15 where Z is the residue of a compound having 1-4 active hydrogens.
Claim 25
Dependent Claim
49 words
A fluid composition for use in compression refrigeration comprising (A) 1,1,1,2-tetrafluoroethane, and (B) a polypropylene glycol having a number average molecular weight of from about 400 to about 1500 with about 95% or more of the free hydroxyl groups esterified with alkanoyl groups of 2 to 6 carbon atoms.
Claim 26
Dependent Claim
49 words
A fluid composition for use in compression refrigeration comprising (A) 1,1,1,2-tetrafluoroethane, and (B) a polypropylene glycol having a number average molecular weight of from about 400 to about 1500 with about 95% or more of the free hydroxyl groups esterified with alkanoyl groups of 2 to 6 carbon atoms.
Claim 27
Dependent Claim
24 words
A fluid composition as set forth in claim 22 wherein said alkanoyl groups are selected from the group consisting of acetate and propionate groups.
Claim 28
Dependent Claim
45 words
A method of lubricating and/or operating compression refrigeration equipment which comprises circulating the composition of claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 or 23 through said compression refrigeration equipment.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-09-24 | 1994-03-26 | 1994-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-24 | 1998-03-26 | 1998-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-24 | 2002-03-26 | 2002-09-25 | $7700.00 | Window Closed / Lapsed |