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US5026499A
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Ternary azeotropic compositions of hexafluoropropylene/ethylene cyclic dimer with trans-1,2-dichloroethylene and methanol
Assignee: EIDP Inc
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Filing: 1990-03-21
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Granted: 1991-06-25
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Expires: 2010-03-21
Abstract
Abstract An azeotropic mixture of hexafluoropropylene/ethylene cyclic dimer (dimer) with trans-1,2-dichloroethylene and methanol is useful in solvent cleaning applications and as refrigerants, aerosol propellants and blowing agents.
Inventors
- 👤 Abid N. Merchant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:15
CPC Classifications
C; 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; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5081; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02806; C08J2207/00; C08J2207/04; C09K2205/00; C09K2205/10; C09K2205/102; C09K2205/12; C09K2205/122; C09K2205/124; C09K2205/32
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
47 words
An azeotropic composition consisting essentially of about 21-27 weight percent of a hexafluoropropylene/ethylene cyclic dimer of the formula ##STR2## 6- 72weight percent trans-1,2-dichloroethylene and about 5-11 weight percent methanol wherein the composition boils at a temperature of about 40.8° C. to 41.2° C. at substantially atmospheric pressure.
Claim 2
Dependent Claim
47 words
An azeotropic composition consisting essentially of about 21-27 weight percent of a hexafluoropropylene/ethylene cyclic dimer of the formula ##STR2## 6- 72weight percent trans-1,2-dichloroethylene and about 5-11 weight percent methanol wherein the composition boils at a temperature of about 40.8° C. to 41.2° C. at substantially atmospheric pressure.
Claim 3
Dependent Claim
24 words
The azeotropic composition of claim 1, consisting essentially of about 23.3 weight percent dimer, 63.0 weight percent trans-1,2-dichloroethylene and about 8.2 weight percent methanol.
Claim 4
Dependent Claim
19 words
A process for cleaning a solid surface which comprises treating said surface with an azeotropic composition of claim 1.
Claim 5
Dependent Claim
19 words
The process of claim 3, wherein the solid surface has a printed circuit board contaminated with flux and flux-residues.
Claim 6
Dependent Claim
12 words
The process of claim 4, wherein the solid surface is a metal.
Claim 7
Dependent Claim
23 words
The composition of claim 1, consisting essentially of about 22-25 weight percent dimer, 66-70 weight percent trans-1,2-dichloroethylene and about 6-9 weight percent methanol.
Claim 8
Dependent Claim
22 words
A process for producing refrigeration which comprises evaporating a mixture of claim 1 in the vicinity of a body to be cooled.
Claim 9
Dependent Claim
22 words
A process for producing heat which comprises condensing a composition of claim 1 in the vicinity of a body to be heated.
Claim 10
Dependent Claim
28 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.
Claim 11
Dependent Claim
22 words
In an aerosol composition comprising a propellant and an active agent, the improvement wherein the propellant is a composition of claim 1.
Claim 12
Dependent Claim
28 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 as a propellant.
Claim 13
Dependent Claim
11 words
The composition of claim 1, consisting of dimer, trans-1,2-dichloroethylene and methanol.
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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) | 1994-06-24 | 1994-12-24 | 1995-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-24 | 1998-12-24 | 1999-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-24 | 2002-12-24 | 2003-06-25 | $7700.00 | Window Closed / Lapsed |