US5026499A
Expired / Lapsed
US
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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 15:47
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.
References Cited (Backward Citations)
US2999815A
Cited
US2999817A
Cited
US3789088A
Cited
US3852474A
Cited
US3917725A
Cited
US3996299A
Cited
US4086407A
Cited
US3881949A
Cited
US3903009A
Cited
US4164471A
Cited
US4057974A
Cited
US4482465A
Cited
US4767561A
Cited
US4902839A
Cited
US4954666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 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 |