EP0450855A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Solvent cleaning of articles
Assignee: 3M Co
•
Filing: 1991-03-27
•
Granted: —
•
Expires: 2011-03-27
Abstract
Abstract Low molecular weight, fluorine-containing ethers of boiling point 20°C to 120°C are used in solvent cleaning applications.
Inventors
- 👤 Neil Winterton
- 👤 David George Mcbeth
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 23:43
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/22; C11D7/26; C11D7/261; C11D7/50; C11D7/5004; C11D7/5018; C11D7/5036; C11D7/504; C11D7/5063; C23; C23G; C23G5/00; C23G5/02; C23G5/032; C11D7/28
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
39 words
A process for cleaning articles which comprises contacting the articles with a solvent composition comprising a low molecular weight fluorine-containing ether of boiling point in the range of about 20°C to about 120°C, or the vapour thereof or both
Claim 2
Dependent Claim
19 words
A process for cleaning article/s as claimed in Claim 1 wherein the ether contains at least 3 carbon atoms.
Claim 3
Dependent Claim
15 words
A process for cleaning articles as claimed in Claim 1 carried out at elevated temperature.
Claim 4
Dependent Claim
26 words
A process for cleaning articles as claimed in Claim 1 wherein the said ether has a boiling point in the range of from 25°C to 80°C.
Claim 5
Dependent Claim
15 words
A process as claimed in Claim 1 wherein the solvent composition further comprises a co-solvent.
Claim 6
Dependent Claim
20 words
A process as claimed in Claim 5 wherein the co-solvent is a lower alkanol having up to 4 carbon atoms.
Claim 7
Dependent Claim
17 words
A process as claimed in Claim 6 wherein the ether and the alcohol form an azeotropic mixture.
Claim 8
Dependent Claim
11 words
A solvent composition as defined in any one of Claims 5-7.
Claim 9
Dependent Claim
42 words
A solvent cleaning composition is claimed in Claim 8 wherein the low molecular weight fluorine containing ether of boiling point in the range of about 20°C to about 120°C is at least 2-chloro-1,1,12-trifluoroethyl methyl ether, tetrafluoroethyl methyl ether, or tetrafluoroethyl ethyl ether.
Claim 10
Dependent Claim
27 words
A solvent cleaning composition as claimed in Claim 9 in the form of an azeotrope wherein the co-solvent is at least one of methanol, ethanol or 1,1,2-trichloro-1,2,2-trifluoroethane.
References Cited (Backward Citations)
No citation records indexed.
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