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US5176757A
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US
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1,1,2,2,3,3-hexafluorocyclopentane and use thereof in compositions and processes for cleaning
Assignee: EIDP Inc
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Filing: 1991-10-28
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Granted: 1993-01-05
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Expires: 2011-10-28
Abstract
Abstract The compound 1,1,2,2,3,3-hexafluorocyclopentane and mixtures thereof with alcohols, ethers, esters, ketones, nitromethane, and halogenated hydrocarbons are disclosed; as is a process for cleaning a solid surface which comprises treating the surface with said compound or said mixtures. Binary mixtures of 1,1,2,2,3,3-hexafluorocyclopentane either with about 27 to 35 weight percent methanol, or with about 21 to 29 weight percent ethanol are disclosed as azeotrope or azeotrope-like compositions and are particularly suited for use where solvent recovery and reuse is practiced.
Inventors
- 👤 Douglas R. Anton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:56
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02803; C07; C07C; C07C17/00; C07C17/23; C07C23/00; C07C23/02; C07C23/08; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5081; H; H05; H05K; H05K3/00; H05K3/22; H05K3/26
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
49 words
A process for cleaning a solid surface which comprises treating said surface with a composition comprising an admixture of effective amounts of 1,1,2,2,3,3-hexafluorocyclopentane and one or more solvents selected from the group consisting of alcohols containing from 1 to 4 carbon atoms to form an azeotrope or azeotrope-like mixture.
Claim 2
Dependent Claim
49 words
A process for cleaning a solid surface which comprises treating said surface with a composition comprising an admixture of effective amounts of 1,1,2,2,3,3-hexafluorocyclopentane and one or more solvents selected from the group consisting of alcohols containing from 1 to 4 carbon atoms to form an azeotrope or azeotrope-like mixture.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein said surface is treated with a mixture in which all components contain no chlorine.
Claim 4
Dependent Claim
20 words
The process of claim 1 wherein the solid surface is a printed circuit board contaminated with flux and flux residues.
Claim 5
Dependent Claim
60 words
The process of claim 1 which comprises treating said surface either with an azeotrope or azeotrope-like composition comprising from about 65 to 73 weight percent 1,1,2,2,3,3-hexafluorocyclopentane and from about 27 to 35 weight percent methanol, or with an azeotrope or azeotrope-like composition comprising from about 71 to 79 weight percent 1,1,2,2,3,3-hexafluorocyclopentane and from about 21 to 29 weight percent ethanol.
Claim 6
Dependent Claim
24 words
The process of claim 1 wherein the solid surface is treated with 1,1,2,2,3,3-hexafluorocyclopentane and alcohol selected from the group consisting of ethanol and methanol.
Claim 7
Dependent Claim
60 words
The process of claim 1 which comprises treating said surface with a cleaning composition consisting essentially of effective amounts of (i) 1,1,2,2,3,3-hexafluorocyclopentane and (ii) one or more solvents selected from the group consisting of alcohols containing from 1 to 4 carbon atoms, to form an azeotrope or azeotrope-like mixture which contains between about 5 and 95 percent by weight 1,1,2,2,3,3-hexafluorocyclopentane.
Claim 8
Dependent Claim
29 words
The process of claim 6 wherein said cleaning composition is a mixture of 1,1,2,2,3,3-hexafluorocyclopentane with one or more compounds selected from the group consisting of methanol, ethanol, and isopropanol.
Claim 9
Dependent Claim
17 words
The process of claim 7 in which all the components of said cleaning composition contain no chlorine.
Claim 10
Dependent Claim
16 words
The process of claim 6 in which all components of said cleaning composition contain no chlorine.
Claim 11
Dependent Claim
25 words
The process of claim 9 wherein said cleaning composition is a mixture of 1,1,2,2,3,3-hexafluorocyclopentane and alcohol selected from the group consisting of methanol and ethanol.
Claim 12
Dependent Claim
20 words
The process of claim 6 which further comprises recovering 1,1,2,2,3,3-hexafluorocyclopentane and one or more of said solvents as an azeotrope.
Claim 13
Dependent Claim
34 words
The process of claim 1 which comprises treating said surface with an azeotrope or azeotrope-like composition comprising from about 65 to 73 weight percent 1,1,2,2,3,3-hexafluorocyclopentane and from about 27 to 35 weight percent methanol.
Claim 14
Dependent Claim
15 words
The process of claim 12 which further comprises recovering 1,1,2,2,3,3-hexafluorocyclopentane and methanol as an azeotrope.
Claim 15
Dependent Claim
25 words
The process of claim 12 wherein the azeotrope or azeotrope-like composition consists essentially of about 69 weight percent 1,1,2,2,3,3-hexafluorocyclopentane and about 31 weight percent methanol.
Claim 16
Dependent Claim
23 words
The process of claim 12 wherein the azeotrope or azeotrope-like composition has a boiling point at about 61° C. at substantially atmospheric pressure.
Claim 17
Dependent Claim
34 words
The process of claim 1 which comprises treating said surface with an azeotrope or azeotrope-like composition comprising from about 71 to 79 weight percent 1,1,2,2,3,3-hexafluorocyclopentane and from about 21 to 29 weight percent ethanol.
Claim 18
Dependent Claim
15 words
The process of claim 16 which further comprises recovering 1,1,2,2,3,3-hexafluorocyclopentane and ethanol as an azeotrope.
Claim 19
Dependent Claim
25 words
The process of claim 16 wherein the azeotrope or azeotrope-like composition consists essentially of about 75 weight percent 1,1,2,2,3,3-hexafluorocyclopentane and about 25 weight percent ethanol.
Claim 20
Dependent Claim
23 words
The process of claim 16 wherein the azeotrope or azeotrope-like composition has a boiling point of about 71° C. at substantially atmospheric pressure.
Claim 21
Dependent Claim
20 words
The process of claim 1 which further comprises recovering 1,1,2,2,3,3-hexafluorocyclopentane and one or more of said solvents as an azeotrope.
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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) | 1996-01-05 | 1996-07-06 | 1997-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-05 | 2000-07-06 | 2001-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-05 | 2004-07-06 | 2005-01-05 | $7700.00 | Window Closed / Lapsed |