US4770714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent mixture containing 2,2,2-trifluoroethanol for use as a cleaning composition
Assignee: Kali Chemie AG
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Filing: 1987-03-16
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Granted: 1988-09-13
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Expires: 2007-03-16
Abstract
Abstract Solvent mixtures of 2,2,2,-trifluoroethanol and halogenated hydrocarbons containing 1 to 3 carbon atoms or polyfluorinated aromatic hydrocarbons in a weight ratio of from 1:90 to 99:1, and optional additive alcohols and/or stabilizers, and uses of such mixtures in cleaning processes, vapor degreasing, removal of adsorbed water from the surfaces of solid objects, and as working fluids for a Rankine process or heat pump.
Inventors
- 👤 Hans Buchwald
- 👤 Boreslaus Raschkowski
- 👤 Dieter Singer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:02
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02809; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K5/045; C11; C11D; C11D7/00; C11D7/50; C11D7/5004; C11D7/5018; C23G5/02803; C23G5/02806; C23G5/032; C09K2205/00; C09K2205/10; C09K2205/102; C09K2205/12; C09K2205/122
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
57 words
An azeotrope-like cleaning composition which consists essentially of 2,2,2-trifluoroethanol and 1,1,2-trichlorotrifluoroethane(=R113) or trichlorofluoromethane(=R11) wherein the 1,1,2-trichlorotrifluoroethane content is from 86 to 90 weight percent and the 2,2,2-trifluoroethanol content is from 10 to 14 weight percent, or the trichlorofluoromethane content is from 94 to 98 weight percent and the 2,2,2-trifluoroethanol content is from 2 to 6 weight percent.
Claim 2
Dependent Claim
57 words
An azeotrope-like cleaning composition which consists essentially of 2,2,2-trifluoroethanol and 1,1,2-trichlorotrifluoroethane(=R113) or trichlorofluoromethane(=R11) wherein the 1,1,2-trichlorotrifluoroethane content is from 86 to 90 weight percent and the 2,2,2-trifluoroethanol content is from 10 to 14 weight percent, or the trichlorofluoromethane content is from 94 to 98 weight percent and the 2,2,2-trifluoroethanol content is from 2 to 6 weight percent.
Claim 3
Dependent Claim
40 words
An azeotrope-like cleaning composition according to claim 1, having a boiling range of from about 42° to about 45° C. and consisting essentially of from 10 to 14 weight percent of 2,2,2-trifluoroethanol and 86 to 90 weight percent of 1,1,2-trichlorotrifluoroethane.
Claim 4
Dependent Claim
15 words
An azeotrope-like cleaning composition according to claim 2, which contains 11.9±0.2 weight percent of 2,2,2-trifluoroethanol.
Claim 5
Dependent Claim
41 words
An azeotrope-like cleaning composition according to claim 1, having a boiling range of from about 21° to about 24° C. and consisting essentially of from 2 to 6 weight percent of 2,2,2-trifluoroethanol and from 94 to 98 weight percent of trichlorofluoromethane.
Claim 6
Dependent Claim
15 words
An azeotrope-like cleaning composition according to claim 4, which contains 4.0±0.2 weight percent of 2,2,2-trifluoroethanol.
Claim 7
Independent Claim
108 words
A method of removing resin fluxes containing polar components from solid objects which comprises treating said objects with a cleaning composition consisting essentially of: (a) 50 to 100 weight percent with respect to the total composition of a mixture of 2,2,2-trifluoroethanol and a halogenated hydrocarbon selected from the group consisting of 1,1,2-trichlorotrifluoroethane(=R113), trichlorofluoromethane(=R11) and tetrachloro-1,2-difluoroethane(=R112), wherein the weight ratio of 2,2,2-trifluoroethanol to said halogenated hydrocarbon in said mixture is from 1:50 to 1:1.5; (b) 0 to 50 weight percent with respect to the total composition of C 1 -C 4 alkyl alcohol, and (c) 0 to 6 weight percent with respect to the total composition of a stabilizer.
Claim 8
Independent Claim
108 words
A method of removing resin fluxes containing polar components from solid objects which comprises treating said objects with a cleaning composition consisting essentially of: (a) 50 to 100 weight percent with respect to the total composition of a mixture of 2,2,2-trifluoroethanol and a halogenated hydrocarbon selected from the group consisting of 1,1,2-trichlorotrifluoroethane(=R113), trichlorofluoromethane(=R11) and tetrachloro-1,2-difluoroethane(=R112), wherein the weight ratio of 2,2,2-trifluoroethanol to said halogenated hydrocarbon in said mixture is from 1:50 to 1:1.5; (b) 0 to 50 weight percent with respect to the total composition of C 1 -C 4 alkyl alcohol, and (c) 0 to 6 weight percent with respect to the total composition of a stabilizer.
Claim 9
Dependent Claim
30 words
A method according to claim 6, wherein in said cleaning composition the 2,2,2-trifluoroethanol content of mixture (a) is from 2 to 14 weight percent with respect to said mixture (a).
Claim 10
Dependent Claim
43 words
A method according to claim 6, wherein said cleaning composition consists essentially of an azeotrope-like mixture of 2,2,2-trifluoroethanol and 1,1,2-trichlorotrifluoroethane having a boiling range of from about 42° to about 45° C. and which contains from 10 to 14 weight percent of 2,2,2-trifluoroethanol.
Claim 11
Dependent Claim
43 words
A method according to claim 6, wherein the cleaning composition consists essentially of an azeotrope-like mixture of 2,2,2-trifluoroethanol and trichlorofluoromethane having a boiling range of from about 21° to about 24° C. and which contains from 2 to 6 weight percent of 2,2,2-trifluoroethanol.
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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) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |