US5035830A
Expired / Lapsed
US
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Binary azeotropic compositions of hexafluoropropylene/ethylene cyclic dimer with methanol or ethanol
Assignee: EIDP Inc
•
Filing: 1990-03-21
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Granted: 1991-07-30
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Expires: 2010-03-21
Abstract
Abstract Azeotropic mixtures of hexafluoropropylene/ethylene cyclic dimer with methanol or ethanol, the azeotropic mixtures being useful as: cleaning agents, blowing agents, refrigerants, aerosol propellants, heat transfer media and power cycle working fluids.
Inventors
- 👤 Abid N. Merchant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:35
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5081; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/149; C09; C09K; C09K3/00; C09K3/30; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K5/045; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02803; C08J2207/00; C08J2207/04; C09K2205/00; C09K2205/10; C09K2205/102; C09K2205/12; C09K2205/124; C09K2205/32; H; H05; H05K; H05K3/00; H05K3/22; H05K3/26
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
41 words
An azeotropic composition consisting essentially of about 82-92 weight percent hexafluoropropylene/ethylene cyclic dimer having a formula of ##STR2## and about 8-18 weight percent methanol wherein the composition boils at about 53.4° C. when the pressure is adjusted to substantially atmospheric pressure.
Claim 2
Dependent Claim
41 words
An azeotropic composition consisting essentially of about 82-92 weight percent hexafluoropropylene/ethylene cyclic dimer having a formula of ##STR2## and about 8-18 weight percent methanol wherein the composition boils at about 53.4° C. when the pressure is adjusted to substantially atmospheric pressure.
Claim 3
Dependent Claim
41 words
An azeotropic composition consisting essentially of about 82-92 weight percent hexafluoropropylene/ethylene cyclic dimer having a formula of ##STR3## and about 8-18 weight percent ethanol wherein the composition boils at about 61° C. when the pressure is adjusted to substantially atmospheric pressure.
Claim 4
Dependent Claim
41 words
An azeotropic composition consisting essentially of about 82-92 weight percent hexafluoropropylene/ethylene cyclic dimer having a formula of ##STR3## and about 8-18 weight percent ethanol wherein the composition boils at about 61° C. when the pressure is adjusted to substantially atmospheric pressure.
Claim 5
Dependent Claim
22 words
The azeotropic composition of claim 1, consisting essentially of about 87.5 weight percent hexafluoropropylene/ethylene cyclic dimer and about 12.5 weight percent methanol.
Claim 6
Dependent Claim
23 words
The azeotropic composition of claim 2, consisting essentially of from about 87.7 weight percent hexafluoropropylene/ethylene cyclic dimer and about 12.3 weight percent ethanol.
Claim 7
Dependent Claim
22 words
The azeotropic composition of claim 1, consisting essentially of about 86-89 weight percent hexafluoropropylene/ethylene cyclic dimer and about 10-15 weight percent methanol.
Claim 8
Dependent Claim
12 words
The composition of claim 1, consisting of hexafluoropropylene/ethylene cyclic dimer and methanol.
Claim 9
Dependent Claim
22 words
The azeotropic composition of claim 2, consisting essentially of about 86-89 weight percent hexafluoropropylene/ethylene cyclic dimer and about 10-15 weight percent ethanol.
Claim 10
Dependent Claim
12 words
The composition of claim 2, consisting of hexafluoropropylene/ethylene cyclic dimer and ethanol.
Claim 11
Dependent Claim
22 words
A process for cleaning a solid surface which comprises treating said surface with an azeotropic composition of claim 1 or claim 2.
Claim 12
Dependent Claim
19 words
The process of claim 9, wherein the solid surface has a printed circuit board contaminated with flux and flux-residues.
Claim 13
Dependent Claim
12 words
The process of claim 10, wherein the solid surface is a metal.
Claim 14
Dependent Claim
25 words
A process for producing refrigeration which comprises evaporating a mixture of claim 1 or claim 2 in the vicinity of a body to be cooled.
Claim 15
Dependent Claim
25 words
A process for producing heat which comprises condensing a composition of claim 1 or claim 2 in the vicinity of a body to be heated.
Claim 16
Dependent Claim
31 words
In a process for preparing a polymer foam comprising expanding a polymer with a blowing agent, the improvement wherein the blowing agent is a composition of claim 1 or claim 2.
Claim 17
Dependent Claim
25 words
In an aerosol composition comprising a propellant and an active agent, the improvement wherein the propellant is a composition of claim 1 or claim 2.
Claim 18
Dependent Claim
31 words
A process for preparing aerosol formulations comprising condensing an active ingredient in an aerosol container with an effective amount of the composition of claim 1 or claim 2 as a propellant.
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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) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |