US4894176A
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Azeotrope-like compositions of 1,1-dichloro-1-fluoroethane, dichlorotrifluoroethane and methanol
Assignee: Honeywell International Inc
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Filing: 1989-01-17
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Granted: 1990-01-16
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Expires: 2009-01-17
Abstract
Abstract Azeotrope-like compositions comprising 1,1-dichloro-1-fluoroethane, dichlorotrifluoroethane and methanol are stable and have utility as degreasing agents and as solvents in a variety of industrial cleaning applications including cold cleaning and defluxing of printed circuit boards.
Inventors
- 👤 Ellen L. Swan
- 👤 Rajat S. Basu
- 👤 Ian R. Shankland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:28
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02809; C23G5/02825; C23G5/02829; C23G5/02832; 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: 24
Claim 1
Independent Claim
92 words
Azeotrope-like compositions consisting essentially of from about 60.0 to about 94.0 weight percent 1,1-dichloro-1-fluoroethane, from about 5.0 to about 35.5 weight percent dichlorotrifluoroethane selected from the group consisting of 1, 2-dichloro-1,2,20trifluoroethane, 1,1-dichloro-2,2,2-trifluoroethane or mixtures thereof and from about 1.0 to about 4.7 weight percent methanol wherein the composition with 1,2-dichloro-1,2,2-trifluoroethane boils at about 29.70° C.±0.3° C. at 760 mm Hg, the composition with 1,1-dichloro-2,2,2-trifluoroethane boils at about 29.58° C.±0.3° C. at 760 mm Hg and the composition with mixtures of the dichlorotrifluoroethanes boils at about 29.64° C.±0.3° C. at 760 mm Hg.
Claim 2
Dependent Claim
92 words
Azeotrope-like compositions consisting essentially of from about 60.0 to about 94.0 weight percent 1,1-dichloro-1-fluoroethane, from about 5.0 to about 35.5 weight percent dichlorotrifluoroethane selected from the group consisting of 1, 2-dichloro-1,2,20trifluoroethane, 1,1-dichloro-2,2,2-trifluoroethane or mixtures thereof and from about 1.0 to about 4.7 weight percent methanol wherein the composition with 1,2-dichloro-1,2,2-trifluoroethane boils at about 29.70° C.±0.3° C. at 760 mm Hg, the composition with 1,1-dichloro-2,2,2-trifluoroethane boils at about 29.58° C.±0.3° C. at 760 mm Hg and the composition with mixtures of the dichlorotrifluoroethanes boils at about 29.64° C.±0.3° C. at 760 mm Hg.
Claim 3
Dependent Claim
37 words
Azeotrope-like compositions according to claim 1 consisting essentially of from about 70.0 to about 94.0 weight percent 1,1-dichloro-1-fluoroethane, from about 5.0 to about 26.0 weight percent dichlorotrifluoroethane and from about 1.0 to about 4.0 weight percent methanol.
Claim 4
Dependent Claim
11 words
Azeotrope-like compositions according to claim 1 wherein said dichlorotrifluoroethane is 1,2-dichloro-1,2,2-trifluoroethane.
Claim 5
Dependent Claim
11 words
Azeotrope-like compositions according to claim 1 wherein said dichlorotrifluoroethane is 1,1-dichloro-2,2,2-trifluoroethane.
Claim 6
Dependent Claim
34 words
Azeotrope-like compositions according to claim 1 consisting essentially of about 75.0 to about 90.0 weight percent, 1,1-dichloro-1-fluoroethane, about 8.0 to about 21.0 weight percent dichlorotrifluoroethane and about 2.0 to about 3.8 weight percent methanol.
Claim 7
Dependent Claim
11 words
Azeotrope-like compositions according to claim 5 wherein said dichlorotrifluoroethane is 1,2-dichloro-1,2,2-trifluoroethane.
Claim 8
Dependent Claim
11 words
Azeotrope-like compositions according to claim 5 wherein said dichlorotrifluoroethane is 1,1-dichloro-2,2,2-trifluoroethane.
Claim 9
Dependent Claim
68 words
Azeotrope-like compositions consisting essentially of 1,1-dichloro-1-fluoroethane, dichlorotrifluoroethane selected from the group consisting of 1, 2-dichloro-1,2,2-trifluoroethane, 1,1-dichloro-2,2,2-trifluoroethane or mixtures thereof and methanol wherein the composition with 1,2-dichloro-1,2,2-trifluoroethane boils at about 29.70° C.±0.3° C. at 760 mm Hg, the composition with 1,1-dichloro-2,2,2-trifluoroethane boils at about 29.58° C.±0.3° C. at 760 mm Hg and the composition with mixtures of the dichlorotrifluoroethanes boils at about 29.64° C.±0.3° C. at 760 mm Hg.
Claim 10
Dependent Claim
68 words
Azeotrope-like compositions consisting essentially of 1,1-dichloro-1-fluoroethane, dichlorotrifluoroethane selected from the group consisting of 1, 2-dichloro-1,2,2-trifluoroethane, 1,1-dichloro-2,2,2-trifluoroethane or mixtures thereof and methanol wherein the composition with 1,2-dichloro-1,2,2-trifluoroethane boils at about 29.70° C.±0.3° C. at 760 mm Hg, the composition with 1,1-dichloro-2,2,2-trifluoroethane boils at about 29.58° C.±0.3° C. at 760 mm Hg and the composition with mixtures of the dichlorotrifluoroethanes boils at about 29.64° C.±0.3° C. at 760 mm Hg.
Claim 11
Dependent Claim
20 words
Azeotrope-like compositions consisting essentially of 1,1-dichloro-1-fluoroethane, 1,2-dichloro-1,2,2-trifluoroethane and methanol which boil at about 29.70° C.±3° C. at 760 mm Hg.
Claim 12
Dependent Claim
20 words
Azeotrope-like compositions consisting essentially of 1,1-dichloro-1-fluoroethane, 1,2-dichloro-1,2,2-trifluoroethane and methanol which boil at about 29.70° C.±3° C. at 760 mm Hg.
Claim 13
Dependent Claim
20 words
Azeotrope-like compositions consisting essentially of 1,1-dichloro-1-fluoroethane, 1,1-dichloro-2,2,2-trifluoroethane and methanol which boil at about 29.58° C.±0.3° C. at 760 mm Hg.
Claim 14
Dependent Claim
20 words
Azeotrope-like compositions consisting essentially of 1,1-dichloro-1-fluoroethane, 1,1-dichloro-2,2,2-trifluoroethane and methanol which boil at about 29.58° C.±0.3° C. at 760 mm Hg.
Claim 15
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 1.
Claim 16
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 2.
Claim 17
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 3.
Claim 18
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 4.
Claim 19
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 5.
Claim 20
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 6.
Claim 21
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 7.
Claim 22
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 8.
Claim 23
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 9.
Claim 24
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 10.
References Cited (Backward Citations)
US3957530A
Cited
US4816174A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
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