Solvent compositions comprising unsaturated fluorinated hydrocarbons
View Patent ↗Disclosed is a method for removing residue from a surface comprising: contacting the surface with a composition comprising at least one unsaturated fluorinated hydrocarbon selected from the group consisting of compounds having the formula E- or Z—R 1 CH═CHR 2 , wherein R 1 and R 2 are, independently, C 1 to C 6 perfluoroalkyl groups, or C 1 to C 6 hydrofluoroalkyl groups, and recovering the surface from the composition.
1. A method for removing residue from a surface comprising:
(a) contacting the surface with a composition consisting essentially of an unsaturated fluorinated hydrocarbon having the formula E- or Z—R 1 CH═CHR 2 , wherein R 1 is C 2 F 5 CF 2 and R 2 is (CF 2 ) 3 CF 3 ,
(b) recovering the surface from the composition.
2. A solvent composition consisting essentially of unsaturated fluorinated hydrocarbon having the formula R 1 CH═CHR 2 , wherein R 1 is C 2 F 5 CF 2 and R 2 is (CF 2 ) 3 CF 3 .
3. The composition of claim 2 , wherein said composition further consists essentially of a propellant.
4. The composition of claim 3 , wherein said aerosol propellant is selected from the group consisting of air, nitrogen, carbon dioxide, difluoromethane (CF 2 H 2 , HFC-32), trifluoromethane (CF 3 H, HFC-23), difluoroethane (CHF 2 CH 3 , HFC-152a), trifluoroethane (CH 3 CF 3 , HFC-143a; or CHF 2 CH 2 F, HFC-143), tetrafluoroethane (CF 3 CH 2 F, HFC-134a; or CF 2 HCF 2 H, HFC-134), pentafluoroethane (CF 3 CF 2 H, HFC-125), and hydrocarbons, such as propane, butanes, or pentanes, or dimethyl ether.
5. The method of claim 1 wherein said composition further consists essentially of an aerosol propellant.
6. The method of claim 1 wherein said composition further consists essentially of a surfactant.
7. The method of claim 1 wherein said composition further consists essentially of a co-solvent.
8. The method of claim 1 , wherein the contacting is accomplished by vapor degreasing.
9. The method of claim 8 , wherein the vapor degreasing is performed by:
(i) boiling the composition; and
(ii) exposing the article to vapors of the boiling cleaning composition.
10. The method of claim 1 , wherein the contacting is accomplished by immersing the article in said composition, wherein the composition is at a temperature greater than ambient or room temperature.
11. The method of claim 10 , wherein the composition is at a temperature of about the boiling point of the composition.
12. The method of claim 10 comprising, after immersing the article in the composition, the further step of immersing the article in the composition, wherein the composition is at a temperature lower than that of the first immersing step.
13. The method of claim 12 , wherein the composition in the second immersing step is at ambient or room temperature.
14. The method of claim 12 comprising, after the second immersing step, the further steps of boiling the composition and exposing the article to vapors of the boiling composition.
15. The method of claim 1 , wherein the composition is at ambient or room temperature.
16. The method of claim 1 , wherein the contacting is accomplished by wiping the article with an object soaked in the composition.
17. A method for depositing a fluorolubricant on a surface comprising:
(a) combining a fluorolubricant and a solvent, said solvent consisting essentially of an unsaturated fluorinated hydrocarbon having the formula E- or Z—R 1 CH═CHR 2 , wherein R 1 is C 2 F 5 CF 2 and R 2 is (CF 2 ) 3 CF 3 ,
(b) contacting the combination of lubricant-solvent with the surface; and
(c) evaporating the solvent from the surface to form a fluorolubricant coating on the surface.
18. The method of claim 17 , wherein the surface is that of a semiconductor material, metal, metal oxide, vapor deposited carbon, or glass.
19. The method of claim 18 , wherein the surface is that of a magnetic medium.
20. The method of claim 19 , wherein the magnetic medium is a computer disk.
21. The method of claim 17 , wherein the contacting step is accomplished by dipping or immersing the surface in a bath comprising the fluorolubricant.
22. The method of claim 17 , wherein the contacting step is accomplished by spraying or spin coating the surface with the fluorolubricant.
23. The method of claim 17 , wherein the fluorolubricant concentration in the lubricant-solvent combination is from about 0.02 weight percent to about 0.5 weight percent.
24. The method of claim 17 , wherein the evaporating step is accomplished at a temperature of from about 10° C. to about 40° C.
25. The method of claim 17 , wherein the fluorolubricant comprises a perfluoropolyether.
26. The method of claim 17 , wherein the fluorolubricant is selected from the group consisting of perfluoropolyethers and mixtures thereof.
27. A process for removing at least a portion of water from the surface of a wetted substrate, said process comprising:
a) contacting the substrate with the composition of claim 1 , wherein the composition further consists essentially of a surfactant, and then
b) removing the substrate from contact with said composition.
28. The composition of claim 2 , wherein said composition further consists essentially of a surfactant.