US5053155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions and process for use in refrigeration
Assignee: EIDP Inc
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Filing: 1989-12-19
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Granted: 1991-10-01
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Expires: 2009-12-19
Abstract
Abstract A blend of from 10% to 100% 1,1,2,2-tetrafluoroethane with at least one of 1,1,1,2-tetrafluoroethane and pentafluoroethane as refrigerant mixed with a mono- or di-functional polyalkylene glycol based on at least 80% propylene oxide having an SUS viscosity at 100° F. of 100 to 1200 is disclosed for use in compression refrigeration.
Inventors
- 👤 Walter Mahler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:29
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K5/045; C10; C10M; C10M171/00; C10M171/008; C09K2205/00; C09K2205/22
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
91 words
A composition for use in compression refrigeration comprising; (a) a refrigerant containing at least 10% by volume of 1,1,2,2-tetrafluoroethane in a blend with at least 10% by volume of at least one of 1,1,1,2-tetrafluoroethane and pentafluoroethane; and (b) a lubricant comprising at least one mono-functional polyalkylene glycol with respect to hydroxly groups, containing greater than 75% propylene oxide units, having an SUS viscosity at 100° F. of 100 to 1200 and being miscible in combination with said refrigerant in the range of temperatures from -40° C. to at least =20° C.
Claim 2
Dependent Claim
91 words
A composition for use in compression refrigeration comprising; (a) a refrigerant containing at least 10% by volume of 1,1,2,2-tetrafluoroethane in a blend with at least 10% by volume of at least one of 1,1,1,2-tetrafluoroethane and pentafluoroethane; and (b) a lubricant comprising at least one mono-functional polyalkylene glycol with respect to hydroxly groups, containing greater than 75% propylene oxide units, having an SUS viscosity at 100° F. of 100 to 1200 and being miscible in combination with said refrigerant in the range of temperatures from -40° C. to at least =20° C.
Claim 3
Dependent Claim
27 words
The composition of claim 1 wherein said refrigerant comprises at least 20% by volume of 1,1,2,2-tetrafluoroethane in a blend with at least 20% by volume of 1,1,1,2-tetrafluoroethane.
Claim 4
Dependent Claim
19 words
The composition of claim 1 wherein said mono-functional polyalkylene glycol has an SUS viscosity at 100° F. of 525.
Claim 5
Dependent Claim
17 words
The composition of claim 1 wherein said mono-functional polyalkylene glycol is based on 100% propylene oxide units.
Claim 6
Independent Claim
80 words
A method for improving lubrication in compression refrigeration equipment using a refrigerant containing at least 20% by volume of 1,1,2,2-tetrafluoroethane in a blend with at least 10% by volume of at lease one of 1,1,1,2-tetrafluoroethane and pentafluoroethane and using 1-99% by weight of a lubricant comprising at least one mono-functional polyalkylene glycol with respect to hydroxyl groups, containing greater than 75% propylene oxide units in combination with said refrigerant, said lubricant having an SUS viscosity of 100-1200 at 100° F.
Claim 7
Independent Claim
80 words
A method for improving lubrication in compression refrigeration equipment using a refrigerant containing at least 20% by volume of 1,1,2,2-tetrafluoroethane in a blend with at least 10% by volume of at lease one of 1,1,1,2-tetrafluoroethane and pentafluoroethane and using 1-99% by weight of a lubricant comprising at least one mono-functional polyalkylene glycol with respect to hydroxyl groups, containing greater than 75% propylene oxide units in combination with said refrigerant, said lubricant having an SUS viscosity of 100-1200 at 100° F.
Claim 8
Dependent Claim
93 words
A composition for use in compression refrigeration comprising: (a) a refrigerant comprising at least 20% by volume of 1,1,2,2-tetrafluoroethane in a blend with at least 20% by volume of at least one of 1,1,1,2-tetrafluoroethane and pentafluoroethane; and (b) a lubricant comprising at least one polyalkylene glycol which is difunctional with respect to hydroxyl groups, containing greater than 75% propylene oxide units, having an SUS viscosity at 100° F. of 100 to 1200 and being miscible in combination with said refrigerant in the range of temperatures from -40° C. to at least =20° C.
Claim 9
Dependent Claim
93 words
A composition for use in compression refrigeration comprising: (a) a refrigerant comprising at least 20% by volume of 1,1,2,2-tetrafluoroethane in a blend with at least 20% by volume of at least one of 1,1,1,2-tetrafluoroethane and pentafluoroethane; and (b) a lubricant comprising at least one polyalkylene glycol which is difunctional with respect to hydroxyl groups, containing greater than 75% propylene oxide units, having an SUS viscosity at 100° F. of 100 to 1200 and being miscible in combination with said refrigerant in the range of temperatures from -40° C. to at least =20° C.
Claim 10
Dependent Claim
25 words
The composition of claim 6 wherein said refrigerant comprises about 20% by volume of 1,1,2,2-tetrafluoroethane in a blend with about 80% by volume of 1,1,1,2-tetrafluoroethane.
Claim 11
Dependent Claim
25 words
The composition of claim 6 wherein said refrigerant comprises about 50% by volume of 1,1,2,2-tetrafluoroethane in a blend with about 50% by volume of 1,1,1,2-tetrafluoroethane.
Claim 12
Dependent Claim
22 words
The composition of claim 6 wherein the SUS viscosity at 100° F. of said difunctional polyalkylene glycol is from 400 to 1000.
Claim 13
Independent Claim
82 words
A method for improving lubrication in compression refrigeration equipment using a refrigerant comprising at least 20% by volume of 1,1,2,2-tetrafluoroethane in a blend with at least 20% by volume of at least one of 1,1,1,2-tetrafluoroethane and pentafluoroethane and using 1-99% by weight of a lubricant comprising at least one polyalkylene glycol which is difunctional with respect to hydroxyl groups, containing greater than 75% propylene oxide units in combination with said refrigerant, said lubricant having an SUS viscosity of 100-1200 at 100° F.
Claim 14
Independent Claim
82 words
A method for improving lubrication in compression refrigeration equipment using a refrigerant comprising at least 20% by volume of 1,1,2,2-tetrafluoroethane in a blend with at least 20% by volume of at least one of 1,1,1,2-tetrafluoroethane and pentafluoroethane and using 1-99% by weight of a lubricant comprising at least one polyalkylene glycol which is difunctional with respect to hydroxyl groups, containing greater than 75% propylene oxide units in combination with said refrigerant, said lubricant having an SUS viscosity of 100-1200 at 100° F.
Claim 15
Dependent Claim
15 words
The method of claim 10 wherein said lubricant is based on 100% propylene oxide units.
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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) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |