US5087383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel azeotropic or azeotrope-like mixture of 2,2,2-trifluoroethyl 1,1,2,2-tetrafluoroethyl ether and ethanol, and its use
Assignee: Solvay SA
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Filing: 1991-04-24
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Granted: 1992-02-11
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Expires: 2011-04-24
Abstract
Abstract The invention relates to a novel azeotropic or azeotrope-like mixture which essentially comprises about 90-97% by mass of 2,2,2-trifluoroethyl 1,1,2,2-tetrafluoroethyl ether and about 3-10% by mass of ethanol and also to a process for cleaning electrical or electronic components, in particular soldered circuit boards or printed circuits, but also other solid surfaces, with the aid of said mixture. Soldering fluxes, in particular, can be removed from circuit boards with the aid of said mixture.
Inventors
- 👤 Horst Robeck
- 👤 Hans-Matthias Deger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:11
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/032; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/504; C11D7/5063; H; H05; H05K; H05K3/00; H05K3/22; H05K3/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
50 words
An azeotropic or like mixture which consists essentially of about 90-97% by mass of 2,2,2-trifluoroethyl 1,1,2,2-tetrafluoroethyl ether and about 3-10% by mass of ethanol, said mixture having a boiling point at 1 bar of about 53° C. and wherein the composition of said mixture does not substantially change upon evaporation.
Claim 2
Dependent Claim
50 words
An azeotropic or like mixture which consists essentially of about 90-97% by mass of 2,2,2-trifluoroethyl 1,1,2,2-tetrafluoroethyl ether and about 3-10% by mass of ethanol, said mixture having a boiling point at 1 bar of about 53° C. and wherein the composition of said mixture does not substantially change upon evaporation.
Claim 3
Dependent Claim
27 words
An azeotropic mixture as claimed in claim 1 which consists essentially of about 92-95% by mass of 2,2,2-trifluoroethyl 1,1,2,2-tetrafluoroethyl ether and about 5-8% by mass of ethanol.
Claim 4
Dependent Claim
27 words
An azeotropic mixture as claimed in claim 1 which consists essentially of about 93.6-93.8% by mass of 2,2,2-trifluoroethyl 1,1,2,2-tetrafluoroethyl ether and about 6.2-6.4% by mass of ethanol.
Claim 5
Dependent Claim
38 words
An azeotropic or azeotrope-like mixture as claimed in claim 1 which consists essentially of 93.7% by mass of 2,2,2-trifluoroethyl 1,1,2,2-tetrafluoroethyl ether and 6.3% by mass of ethanol and has a boiling point of 53.1° C. at 1 bar.
Claim 6
Dependent Claim
23 words
A process for cleaning electrical or electronic components, which comprises washing the components with an or azeotrope-like mixture as claimed in claim 1.
Claim 7
Dependent Claim
23 words
A process for removing soldering fluxes from a surface which comprises washing said surface with the azeotrope-like mixture as claimed in claim 1.
Claim 8
Dependent Claim
22 words
A process for cleaning a solid surface, which comprises washing the solid surface with an azeotrope-like mixture as claimed in claim 1.
Claim 9
Dependent Claim
16 words
A process according to claim 7 wherein said components are soldered circuit boards or printed circuits.
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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) | 1995-02-10 | 1995-08-12 | 1996-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-10 | 1999-08-12 | 2000-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-10 | 2003-08-12 | 2004-02-11 | $7700.00 | Window Closed / Lapsed |