Patent US5114609A successfully refreshed from Google Patents.
US5114609A
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Cleaning compositions
Assignee: Kali Chemie AG
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Filing: 1990-01-04
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Granted: 1992-05-19
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Expires: 2010-01-04
Abstract
Abstract Improved cleaning compositions are disclosed based on fluorochlorohydrocarbons, alkanols and at least one ester selected from the group consisting of methyl propionate, ethyl propionate and ethyl acetate. The compositions may optionally contain additional additives and are highly suitable for industrial cleaning processes or for vapor degreasing, for example, particularly for removing resin soldering fluxes containing high amounts of activator.
Inventors
- 👤 Hans Buchwald
- 👤 Boleslaus Raschkowski
- 👤 Dieter Singer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:44
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/22; C11D7/26; C11D7/261; C11D7/5004; C11D7/5018; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5086; C11D7/266; C11D7/28
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
71 words
A composition consisting essentially of from 97.5 to 89.0 wt-% of a fluorochlorohydrocarbon with 1 or 2 carbon atoms selected from the group consisting of trichlorofluoromethane, the tetrachlorodifluoroethanes, the trichlorotrifluoroethanes, the dichlorotrifluoroethanes, and the dichloromonofluoroethanes, from 2.0 to 8.0 wt-% of an alkanol with 1 to 4 carbon atoms, and from 0.5 to 3 wt-% of an ester selected from the group consisting of ethyl propionate, methyl propionate and ethyl acetate.
Claim 2
Dependent Claim
71 words
A composition consisting essentially of from 97.5 to 89.0 wt-% of a fluorochlorohydrocarbon with 1 or 2 carbon atoms selected from the group consisting of trichlorofluoromethane, the tetrachlorodifluoroethanes, the trichlorotrifluoroethanes, the dichlorotrifluoroethanes, and the dichloromonofluoroethanes, from 2.0 to 8.0 wt-% of an alkanol with 1 to 4 carbon atoms, and from 0.5 to 3 wt-% of an ester selected from the group consisting of ethyl propionate, methyl propionate and ethyl acetate.
Claim 3
Dependent Claim
22 words
A composition according to claim 1, wherein said fluorochlorohydrocarbon has a boiling point in the range from 20° C. to 120° C.
Claim 4
Dependent Claim
33 words
A compositions according to claim 1, wherein said fluorochlorohydrocarbon with 1 to 2 carbon atoms is selected from the group consisting of trichlorofluoromethane (R11), 1,1,2,2-tetrachloro-1,2-difluoroethane (R112), 1,1,2-trichloro-1,2,2-trifluoroethane (R113), 1,1-dichloro-2,2,2-trifluoroethane (R123), and 1,1-dichloro-1-fluoroethane (R141b).
Claim 5
Dependent Claim
24 words
A composition according to claim 1, wherein said alkanol is selected from the group consisting of methanol, ethanol, isopropanol, n-propanol, n-butanol, sec.-butanol and tert.-butanol.
Claim 6
Dependent Claim
20 words
A composition according to claim 4, wherein said alkanol is selected from the group consisting of methanol, ethanol and isopropanol.
Claim 7
Dependent Claim
35 words
A composition according to claim 1, consisting of essentially of an azeotropic mixture of about 94.2 wt-% 1,1,2-trichloro-1,2,2-trifluoroethane (R113), 3.5 wt-% ethanol and 2.3 wt-% ethyl acetate having a boiling point of approximately 44.3° C.
Claim 8
Dependent Claim
25 words
A composition according to claim 1, further containing from about 0.01 to 5 wt-% of a stabilizer, relative to the total weight of the composition.
Claim 9
Dependent Claim
22 words
A composition according to claim 7, containing from about 0.05 to 1 wt-% stabilizer, relative to the total weight of the composition.
Claim 10
Dependent Claim
21 words
A composition according to claim 7, wherein said stabilizer is selected from the group consisting of nitroalkanes, alkylene oxides and alkynols.
Claim 11
Dependent Claim
17 words
A method of cleaning an article comprising contacting said article with a composition according to claim 1.
Claim 12
Dependent Claim
21 words
A method according to claim 10, whereins said contacting is effected by immersing the article to be cleaned in said composition.
Claim 13
Dependent Claim
18 words
A method according to claim 10, wherein said contacting is effected by spraying said composition on the article.
Claim 14
Dependent Claim
25 words
A method of vapor degreasing an article comprising subjecting an article to be vapor degreased to the vapors of a composition according to claim 1.
Claim 15
Dependent Claim
38 words
A method of removing soldering flux or soldering flux residue from the surface of a printed circuit board contaminated therewith, said method comprising contacting the surface of said printed circuit board with a composition according to claim 1.
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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) | 1995-05-19 | 1995-11-18 | 1996-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-19 | 1999-11-18 | 2000-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-19 | 2003-11-18 | 2004-05-19 | $7700.00 | Window Closed / Lapsed |