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US4961870A
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Azeotrope-like compositions of 1,1,2-trichloro-1,2,2-trifluoroethane,1,2-dichloroethylene, and alkanol having 3 to 7 carbon atoms
Assignee: Honeywell International Inc
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Filing: 1989-12-14
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Granted: 1990-10-09
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Expires: 2009-12-14
Abstract
Abstract Azeotrope-like compositions comprising 1,1,2-trichloro-1,2,2-trifluoroethane; 1,2-dichloroethylene; and alkanol having 3 to 7 carbon atoms have utility as degreasing agents and as solvents in a variety of industrial cleaning applications including cold cleaning and defluxing a printed circuit boards.
Inventors
- 👤 Kane D. Cook
- 👤 Chien C. Li
- 👤 Rajat S. Basu
- 👤 David P. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:11
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5081; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02809; C23G5/02812; C23G5/02816; C23G5/02819; C23G5/02854; C23G5/02861; C23G5/0288
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
42 words
Azeotrope-like compositions comprising from about 55 to about 70 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane; from about 30 to about 42 weight pe rcent trans-1,2-dichloroethylene; and from about 0.01 to about 3.0 weight percent 2-methyl-2-propanol which boil at about 44.5° C at 760 mm Hg.
Claim 2
Dependent Claim
42 words
Azeotrope-like compositions comprising from about 55 to about 70 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane; from about 30 to about 42 weight pe rcent trans-1,2-dichloroethylene; and from about 0.01 to about 3.0 weight percent 2-methyl-2-propanol which boil at about 44.5° C at 760 mm Hg.
Claim 3
Dependent Claim
40 words
The azeotrope-like compositions of claim 3 consisting essentially of from about 58 to about 67 weight percent said 1,1,2-trichloro-1,2,2-trifluoroethane; from about 33 to about 41 weight percent said trans-1,2-dichloroethylene; and from about 0.01 to about 1.0 weight percent said 2-methyl-2-propanol.
Claim 4
Dependent Claim
43 words
Azeotrope-like compositions consisting essentially of from about 55 to about 70 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane; from about 30 to about 42 weight percent trans-1,2-dichloroethylene; and from about 0.01 to about 3.0 weight percent 3-pentanol which boil at about 45.1° C. at 760 mm Hg.
Claim 5
Dependent Claim
43 words
Azeotrope-like compositions consisting essentially of from about 55 to about 70 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane; from about 30 to about 42 weight percent trans-1,2-dichloroethylene; and from about 0.01 to about 3.0 weight percent 3-pentanol which boil at about 45.1° C. at 760 mm Hg.
Claim 6
Dependent Claim
40 words
The azeotrope-like compositions of cliam 8 consisting essentially of from about 58 to about 67 weight percent said 1,1,2-trichloro-1,2,2-trifluoroethane; from about 33 to about 41 weight percent said trans-1,2-dichloroethylene; and from about 0.01 to about 1.0 weight percent said 3-pentanol.
Claim 7
Dependent Claim
40 words
The azeotrope-like compositions of cliam 8 consisting essentially of from about 58 to about 67 weight percent said 1,1,2-trichloro-1,2,2-trifluoroethane; from about 33 to about 41 weight percent said trans-1,2-dichloroethylene; and from about 0.01 to about 1.0 weight percent said 3-pentanol.
Claim 8
Dependent Claim
35 words
Stabilized azeotrope-like compositions consisting essentially of the azeotrope-like compositions of claim 3 and effective stabilizing amounts of a lower 1,2-epoxy alkane and at least one of a lower alkoxyphenol, phosphite ester, and lower cyclic alkene.
Claim 9
Dependent Claim
36 words
Stabilized azeotrope-like compositions consisting of essentially of the azeotrope-like compositions of claim 5 and effective stabilizing amounts of a lower 1,2-epoxy alkane and at least one of a lower alkoxyphenol, phosphite ester, and lower cyclic alkene.
Claim 10
Dependent Claim
35 words
Stabilized azeotrope-like compositions consisting essentially of the azeotrope-like compositions of claim 8 and effective stabilizing amounts of a lower 1,2-epoxy alkane and at least one of a lower alkoxyphenol, phosphite ester, and lower cyclic alkene.
Claim 11
Dependent Claim
33 words
Stabilized azeotrope-like compositions comprising the azeotrope-like compositions of claim 10 and effective stabilizing amounts of a lower 1,2-epoxy alkane and at least one of a lower alkoxyphenol, phosphite ester, and lower cyclic alkene.
Claim 12
Dependent Claim
19 words
A method of cleaning a solid surface which comprises treating said surface with said azeotrope-like composition of claim 3.
Claim 13
Dependent Claim
19 words
A method of cleaning a solid surface which comprises treating said surface with said azeotrope-like composition of claim 5.
Claim 14
Dependent Claim
19 words
A method of cleaning a solid surface which comprises treating said surface with said azeotrope-like composition of claim 8.
Claim 15
Dependent Claim
19 words
A method of cleaning a solid surface which comprises treating said surface with said azeotrope-like composition of claim 10.
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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) | 1993-10-08 | 1994-04-09 | 1994-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-08 | 1998-04-09 | 1998-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-08 | 2002-04-09 | 2002-10-09 | $7700.00 | Window Closed / Lapsed |