US4189397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of 1,1,1-trichloroethane compositions against metal-induced decomposition with a polyalkylene glycol monoalkyl ether
Assignee: Imperial Chemical Industries Ltd
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Filing: 1977-12-15
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Granted: 1980-02-19
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Expires: 1997-12-15
Abstract
Abstract 1,1,1-trichloroethane is stabilised against metal-induced decomposition by incorporating a polyalkylene glycol monoalkyl ether.
Inventors
- 👤 Christopher S. Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:14
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02854; C23G5/02861; C23G5/02877; C07; C07C; C07C17/00; C07C17/38; C07C17/42
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
57 words
A stabilised solvent composition consisting essentially of 1,1,1-trichloroethane with a stabilising amount of from 0.01% to 5% by weight of a stabiliser which is a polyalkylene glycol monoalkyl ether of formula ##STR2## where R is an alkyl group containing 1 to 4 carbon atoms, R' is hydrogen or a methyl group and n is 2 or 3.
Claim 2
Dependent Claim
57 words
A stabilised solvent composition consisting essentially of 1,1,1-trichloroethane with a stabilising amount of from 0.01% to 5% by weight of a stabiliser which is a polyalkylene glycol monoalkyl ether of formula ##STR2## where R is an alkyl group containing 1 to 4 carbon atoms, R' is hydrogen or a methyl group and n is 2 or 3.
Claim 3
Dependent Claim
15 words
A composition as claimed in claim 1 wherein the stabiliser is diethylene glycol monoalkyl ether.
Claim 4
Dependent Claim
15 words
A composition as claimed in claim 2 wherein the stabiliser is diethylene glycol monomethyl ether.
Claim 5
Dependent Claim
15 words
A composition as claimed in claim 2 wherein the stabiliser is diethylene glycol monoethyl ether.
Claim 6
Dependent Claim
16 words
A composition stabilised as claimed in claim 2 wherein the stabiliser is diethylene glycol monobutyl ether.
Claim 7
Dependent Claim
26 words
A composition as claimed in claim 1 wherein the stabiliser is present in an amount in the range 0.2% to 5% by weight of the solvent.
Claim 8
Dependent Claim
19 words
A composition as claimed in claim 6 wherein the range is 0.2% to 2% by weight of the solvent.
Claim 9
Dependent Claim
41 words
A composition as claimed in claim 1 in which there is also incorporated a stabilising amount of at least one additional stabiliser selected from the group consisting of organic nitrates, nitriles, nitroalkanes, epoxides, cyclic ethers, amines, alcohols, pyrrole and substituted pyrroles.
Claim 10
Dependent Claim
29 words
A composition as claimed in claim 8 in which the at least one additional stabiliser is present in an amount not greater than 3% by weight of the 1,1,1-trichloroethane.
Claim 11
Dependent Claim
29 words
A method of inhibiting decomposition of 1,1,1-trichloroethane due to the presence of metals which comprises incorporating in said 1,1,1-trichloroethane a polyalkylene glycol monoalkyl ether as described in claim 1.
Claim 12
Dependent Claim
32 words
The method of claim 10 further comprising incorporating at least one additional stabiliser selected from the group consisting of organic nitrates, nitriles, nitroalkanes, epoxides, cyclic ethers, amines, alcohols, pyrrole, and substituted pyrroles.
Claim 13
Dependent Claim
25 words
A method of degreasing metal and other articles which comprises bringing the articles into contact with the stabilised solvent composition as described in claim 11.
Claim 14
Dependent Claim
34 words
The method of claim 12 wherein said solvent composition includes at least one additional stabiliser selected from the group consisting of organic nitrates, nitriles, nitroalkanes, epoxides, cyclic ethers, amines, alcohols, pyrrole, and substituted pyrroles.
References Cited (Backward Citations)
US2371644A
Cited
GB892286A
Cited
US3074890A
Cited
GB930973A
Cited
US3128315A
Cited
US3269953A
Cited
DE1936987U
Cited
NL6919493A
Cited
DE2002284A1
Cited
US3701627A
Cited
US3957893A
Cited
US4056403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-18 | 1983-08-20 | 1984-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-18 | 1987-08-20 | 1988-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-18 | 1991-08-20 | 1992-02-19 | $7700.00 | Window Closed / Lapsed |